Patent Publication Number: US-11021944-B2

Title: Well construction communication and control

Description:
BACKGROUND OF THE DISCLOSURE 
     In the drilling of oil and gas wells, drilling rigs are used to create a well by drilling a wellbore into a formation to reach oil and gas deposits (e.g., hydrocarbon deposits). During the drilling process, as the depth of the wellbore increases, so does the length and weight of the drillstring. A drillstring may include sections of drill pipe, a bottom hole assembly, and other tools for creating a well. The length of the drillstring may be increased by adding additional sections of drill pipe as the depth of the wellbore increases. Various components of a drilling rig can be used to advance the drillstring into the formation. 
     SUMMARY OF THE DISCLOSURE 
     This summary is provided to introduce a selection of concepts that are further described below in the detailed description. This summary is not intended to identify indispensable features of the claimed subject matter, nor is it intended for use as an aid in limiting the scope of the claimed subject matter. 
     The present disclosure introduces an apparatus including a processing system having a processor and a memory including computer program code. The processing system is operable to implement an arbiter. The arbiter is operable to receive commands from one or more non-prioritized actors and one or more prioritized actors, and repeatedly issue an earliest received, non-issued command received from the one or more non-prioritized actors. Execution of an immediately preceding issued command is completed or is terminated by a sending actor of the immediately preceding issued command before a subsequent earliest received, non-issued command is issued. The arbiter is also operable to issue a command received from one of the one or more prioritized actors upon receipt of the command received from one of the one or more prioritized actors. Issuance of the command received from the one of the one or more prioritized actor is operable to interrupt issuance and execution of a command received from the one or more non-prioritized actors. The commands from the one or more non-prioritized actors and the one or more prioritized actors are issued to one or more equipment controllers operable to control equipment of a well construction system. 
     The present disclosure also introduces an apparatus including a network of a well construction system, and a first processing system communicatively coupled to the network and having a processor and a memory including computer program code. The first processing system is operable to generate one or more job plans based on conditions of the well construction system, and to transmit the one or more job plans through the network. The apparatus also includes a second processing system communicatively coupled to the network and having a processor and a memory including computer program code. The first processing system is operable to implement a human-machine interface (HMI), and the HMI is operable to transmit through the network an HMI command based on user input into the HMI. The apparatus also includes a third processing system communicatively coupled to the network and having a processor and a memory including computer program code. The first processing system is operable to receive the one or more job plans, and generate job commands based on the one or more job plans. The first processing system is also operable to implement an arbiter. The arbiter is operable to receive the job commands and the HMI command, and to repeatedly issue an earliest received, non-issued one of the job commands. Execution of an immediately preceding issued job command is completed or is terminated by the third processing system based on the one or more job plans before a subsequent earliest received, non-issued one of the job commands is issued. The arbiter is also operable to issue the HMI command upon receipt of the HMI command. Issuance of the HMI command is operable to interrupt issuance and execution of the job commands. The job commands and the HMI command are issued to one or more equipment controllers operable to control equipment of the well construction system. 
     The present disclosure also introduces a method including operating a processing system having a processor and a memory including computer program code. Operating the processing system includes operating an arbiter. Operating the arbiter includes receiving commands from one or more non-prioritized actors and one or more prioritized actors. Operating the arbiter also includes repeatedly issuing an earliest received, non-issued command received from the one or more non-prioritized actors. Execution of an immediately preceding issued command is completed or is terminated by a sending actor of the immediately preceding issued command before a subsequent earliest received, non-issued command is issued. Operating the arbiter also includes issuing a command received from one of the one or more prioritized actors upon receipt of the command received from one of the one or more prioritized actors. Issuance of the command received from the one of the one or more prioritized actor is operable to interrupt issuance and execution of a command received from the one or more non-prioritized actors. The commands from the one or more non-prioritized actors and the one or more prioritized actors are issued to one or more equipment controllers operable to control equipment of a well construction system. 
     The present disclosure also introduces a method including operating a first processing system communicatively coupled to a network and having a processor and a memory including computer program code. Operating the first processing system includes executing one or more job plans based on conditions of a well construction system, and transmitting the one or more job plans through the network. The method also includes operating a second processing system communicatively coupled to the network and having a processor and a memory including computer program code. Operating the first processing system includes operating an HMI, and operating the HMI includes transmitting through the network an HMI command based on user input into the HMI. The method also includes operating a third processing system communicatively coupled to the network and having a processor and a memory including computer program code. Operating the first processing system includes receiving the one or more job plans, generating job commands based on the one or more job plans, and operating an arbiter. Operating the arbiter includes receiving the job commands and the HMI command, and repeatedly issuing an earliest received, non-issued one of the job commands. Execution of an immediately preceding issued job command is completed or is terminated by the third processing system based on the one or more job plans before a subsequent earliest received, non-issued one of the job commands is issued. Operating the arbiter also includes issuing the HMI command upon receipt of the HMI command. Issuance of the HMI command is operable to interrupt issuance and execution of the job commands. The job commands and the HMI command are issued to one or more equipment controllers operable to control equipment of the well construction system. 
     These and additional aspects of the present disclosure are set forth in the description that follows, and/or may be learned by a person having ordinary skill in the art by reading the material herein and/or practicing the principles described herein. At least some aspects of the present disclosure may be achieved via means recited in the attached claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure is understood from the following detailed description when read with the accompanying figures. It is emphasized that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. 
         FIG. 1  is a schematic view of at least a portion of an example implementation of apparatus according to one or more aspects of the present disclosure. 
         FIG. 2  is a schematic view of at least a portion of an example implementation of apparatus according to one or more aspects of the present disclosure. 
         FIG. 3  is a schematic view of at least a portion of an example implementation of apparatus according to one or more aspects of the present disclosure. 
         FIG. 4  is a flow-chart diagram of at least a portion of an example implementation of a method according to one or more aspects of the present disclosure. 
         FIG. 5  is a flow-chart diagram of at least a portion of an example implementation of a method according to one or more aspects of the present disclosure. 
         FIG. 6  is a flow-chart diagram of at least a portion of an example implementation of a method according to one or more aspects of the present disclosure. 
         FIG. 7  is a schematic view of at least a portion of an example implementation of apparatus according to one or more aspects of the present disclosure. 
         FIG. 8  is a schematic view of at least a portion of an example implementation of apparatus according to one or more aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     It is to be understood that the following disclosure provides many different embodiments, or examples, for implementing different features of various embodiments. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for simplicity and clarity, and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. 
     Systems and methods and/or processes according to one or more aspects of the present disclosure may be used or performed in connection with well construction at a wellsite, such as construction of a wellbore to obtain hydrocarbons (e.g., oil and/or gas) from a formation, including drilling the wellbore. For example, some aspects of the present disclosure may be described in the context of drilling a wellbore in the oil and gas industry, although one or more aspects of the present disclosure may also or instead be used in other systems. Various subsystems used in constructing the wellsite may have sensors and/or controllable components that are communicatively coupled to one or more equipment controllers (ECs). An EC can include a programmable logic controller (PLC), an industrial computer, a personal computer based controller, a soft PLC, the like, and/or an example controller configured and operable to (1) perform sensing of an environmental status and/or (2) control equipment. Sensors and various other components may transmit sensor data and/or status data to an EC, and controllable components may receive commands from an EC to control operations of the controllable components. One or more aspects disclosed herein may permit communication between ECs of different subsystems through virtual networks and/or a common data bus. Sensor data and/or status data may be communicated between ECs of different subsystems through virtual networks and a common data bus. Additionally, a coordinated controller can implement control logic to issue commands to various ones of the ECs through the virtual networks and common data bus to thereby control operations of one or more controllable components. Additional details of example implementations are described below. A person having ordinary skill in the art will readily understand that one or more aspects of systems and methods and/or processes disclosed herein may be used in other contexts, including other systems. 
       FIG. 1  is a schematic view of at least a portion of an example implementation of a well construction system  100  operable to drill a wellbore  104  into a subsurface formation  102  at a wellsite in accordance with one or more aspects of the present disclosure. A drillstring  106  penetrates the wellbore  104  and includes a bottom hole assembly (BHA)  108  that comprises or is mechanically and hydraulically coupled to a drill bit  110 . The well construction system  100  includes a mast  114  (a portion of which is depicted in  FIG. 1 ) extending from a rig floor  112  that is erected over the wellbore  104 . A top drive  116  is suspended from the mast  114  and is detachably, mechanically, and hydraulically coupled to the drillstring  106 . The top drive  116  provides a rotational force (e.g., torque) to drive rotational movement of the drillstring  106  when advancing the drillstring  106  into the formation  102  to form the wellbore  104 . 
     The top drive  116  is suspended from the mast  114  via hoisting equipment. The hoisting equipment includes a traveling block  118  with a hook or other means  120  for mechanically coupling the traveling block  118  to the top drive  116 . The hoisting equipment also includes a crown block  122  attached to the mast  114 , a drawworks  124  anchored to the rig floor  112  and comprising a drum  125 , a deadline anchor  126  attached to the rig floor  112 , and a drill line  128  extending from the deadline anchor  126 , around the crown block  122  and the traveling block  118 , and to the drawworks  124  where the excess length is spooled around the drum  125 . The portion of the drill line  128  extending from the deadline anchor  126  to the crown block  122  is referred to as the deadline  130  (a portion of which being depicted in  FIG. 1  in phantom). 
     The crown block  122  and the traveling block  118  collectively comprise a system of pulleys or sheaves around which the drill line  128  is reeved. The drawworks  124  comprises the drum  125  and an engine, motor, or other prime mover (not shown). The drawworks  124  may also comprise a control system and/or one or more brakes, such as a mechanical brake (e.g., a disk brake), an electrodynamic brake, and/or the like, although the prime mover and/or control system may instead provide the braking function. The prime mover of the drawworks  124  drives the drum  125  to rotate and reel in the drill line  128 , which causes the traveling block  118  and the top drive  116  to move upward away from the rig floor  112 . The drawworks  124  can reel out the drill line  128  by a controlled rotation of the drum  125  using the prime mover and control system, and/or by disengaging the prime mover (such as with a clutch) and disengaging and/or operating one or more brakes to control the release of the drill line  128 . Unreeling the drill line  128  from the drawworks  124  causes the traveling block  118  and the top drive  116  to move downward toward the rig floor  112 . 
     Implementations within the scope of the present disclosure include land-based rigs, as depicted in  FIG. 1 , as well as offshore implementations. In offshore implementations, the hoisting equipment may also include a motion or heave compensator between the mast  114  and the crown block  122  and/or between the traveling block  118  and the hook  120 , among other possible additional components. 
     The top drive  116  includes a drive shaft  132 , a pipe handling assembly  134  with an elevator  136 , and various other components not shown in  FIG. 1 , such as a prime mover and a grabber. The drillstring  106  is mechanically coupled to the drive shaft  132  (e.g., with or without a sub saver between the drillstring  106  and the drive shaft  132 ). The prime mover drives the drive shaft  132 , such as through a gearbox or transmission, to rotate the drive shaft  132  and, therefore, the drillstring  106 . The pipe handling assembly  134  and the elevator  136  permit the top drive  116  to handle tubulars (e.g., single, double, or triple stands of drill pipe and/or casing) that are not mechanically coupled to the drive shaft  132 . The grabber includes a clamp that clamps onto a tubular when making up and/or breaking out a connection of a tubular with the drive shaft  132 . A guide system (e.g., rollers, rack-and-pinion elements, and/or other mechanisms) may include a guide  140  affixed or integral to the mast  114 , and a dolly  138  integral to or otherwise carried with the top drive  116  up and down the guide  140 . The guide system may provide torque reaction, such as to prevent rotation of the top drive  116  while the prime mover is rotating the drive shaft  132 . The guide system may also or instead aid in maintaining alignment of the top drive  116  with an opening  113  in the rig floor  112  through which the drillstring  106  extends. 
     A drilling fluid circulation system circulates oil-based mud (OBM), water-based mud (WBM), and/or other drilling fluid to the drill bit  110 . A pump  142  delivers drilling fluid through, for example, a discharge line  144 , a standpipe  146 , and a hose  148  to a port  150  of the top drive  116 . The drilling fluid is then conducted through the drillstring  106  to the drill bit  110 , exiting into the wellbore  104  via ports in the drill bit  110 . The drilling fluid then circulates upward through an annulus  152  defined between the outside of the drillstring  106  and the wall of the wellbore  104  (or the wall of casing installed in the wellbore  104 , if applicable). In this manner, the drilling fluid lubricates the drill bit  110  and carries formation cuttings up to the surface as the drilling fluid is circulated. 
     At the surface, the drilling fluid may be processed for recirculation. For example, the drilling fluid may flow through a blowout preventer  154  and a bell nipple  156  that diverts the drilling fluid to a return flowline  158 . The return flowline  158  may direct the drilling fluid to a shale shaker  160  that removes at least large formation cuttings from the drilling fluid. The drilling fluid may then be directed to reconditioning equipment  162 , such as may remove gas and/or finer formation cuttings from the drilling fluid. The reconditioning equipment  162  can include a desilter, a desander, a degasser, and/or other components. 
     After treatment by the reconditioning equipment  162 , the drilling fluid may be conveyed to one or more mud tanks  164 . Intermediate mud tanks may also be used to hold drilling fluid before and/or after the shale shaker  160  and/or various ones of the reconditioning equipment  162 . The mud tank(s)  164  can include an agitator to assist in maintaining uniformity (e.g., homogeneity) of the drilling fluid contained therein. A hopper (not depicted) may be disposed in a flowline between the mud tank(s)  164  and the pump  142  to disperse an additive, such as caustic soda, in the drilling fluid. 
     A catwalk  166  can be used to convey tubulars from a ground level to the rig floor  112 . The catwalk  166  has a horizontal portion  167  and an inclined portion  168  that extends between the horizontal portion  167  and the rig floor  112 . A skate  169  may be positioned in a groove and/or other alignment means in the horizontal and inclined portions of the catwalk  166 . The skate  169  can be driven along the groove by a rope, chain, belt, and/or other pulley system (not depicted), thereby pushing tubulars up the inclined portion  168  of the catwalk  166  to a position at or near the rig floor  112  for subsequent engagement by the elevator  136  of the top drive  116  and/or other pipe handling means. However, other means for transporting tubulars from the ground to the rig floor  112  are also within the scope of the present disclosure. One or more pipe racks (not shown) may also adjoin the horizontal portion  167  of the catwalk  166 , and may include or operate in conjunction with a tubular delivery unit and/or other means for transferring tubulars to the horizontal portion  167  of the catwalk  166  in a mechanized and/or automated manner. 
     An iron roughneck  170  is also disposed on the rig floor  112 . The iron roughneck  170  comprises a spinning system  172  and a torque wrench comprising a lower gripper  174  and an upper gripper  176 . The iron roughneck  170  is moveable (e.g., in a translation movement  178 ) to approach the drillstring  106  (e.g., for making up and/or breaking out a connection of the drillstring  106 ) and to move clear of the drillstring  106 . The spinning system  172  applies low-torque spinning to threadedly engage or disengage a threaded connection between tubulars of the drillstring  106 , and the torque wrench applies a higher torque to ultimately make up or initially break out the threaded connection. 
     Manual, mechanized, and/or automated slips  180  are also disposed on and/or in the rig floor  112 . The drillstring  106  extends through the slips  180 . In mechanized and/or automated implementations of the slips  180 , the slips  180  can be actuated between open and closed positions. In the open position, the slips  180  permit advancement of the drillstring  106  through the slips  180 . In the closed position, the slips  180  clamp the drillstring  106  to prevent advancement of the drillstring  106 , including with sufficient force to support the weight of the drillstring  106  suspended in the wellbore  104 . 
     To form the wellbore  104  (e.g., “make hole”), the hoisting equipment lowers the top drive  116 , and thus the drillstring  106  suspended from the top drive  116 , while the top drive  116  rotates the drillstring  106 . During this advancement of the drillstring  106 , the slips  180  are in the open position, and the iron roughneck  170  is clear of the drillstring  106 . When the upper end of the tubular in the drillstring  106  that is made up to the top drive  116  nears the slips  180 , the hoisting equipment ceases downward movement of the top drive  116 , the top drive  116  ceases rotating the drillstring  106 , and the slips  180  close to clamp the drillstring  106 . The grabber of the top drive  116  clamps the upper portion of the tubular made up to the drive shaft  132 . The drive shaft  132  is driven via operation of the prime mover of the top drive  116  to break out the connection between the drive shaft  132  and the drillstring  106 . The grabber of the top drive  116  then releases the tubular of the drillstring  106 , and the hoisting equipment raises the top drive  116  clear of the “stump” of the drillstring  106  extending upward from the slips  180 . 
     The elevator  136  of the top drive  116  is then pivoted away from the drillstring  106  towards another tubular extending up through the rig floor  112  via operation of the catwalk  166 . The elevator  136  and the hoisting equipment are then operated to grasp the additional tubular with the elevator  136 . The hoisting equipment then raises the additional tubular, and the elevator  136  and the hoisting equipment are then operated to align and lower the bottom end of the additional tubular to proximate the upper end of the stump. 
     The iron roughneck  170  is moved  178  toward the drillstring  106 , and the lower gripper  174  clamps onto the stump of the drillstring  106 . The spinning system  172  then rotates the suspended tubular to engage a threaded (e.g., male) connector with a threaded (e.g., female) connector at the top end of the stump. Such spinning continues until achieving a predetermined torque, number of spins, vertical displacement of the additional tubular relative to the stump, and/or other operational parameters. The upper gripper  176  then clamps onto and rotates the additional tubular with a higher torque sufficient to complete making up the connection with the stump. In this manner, the additional tubular becomes part of the drillstring  106 . The iron roughneck  170  then releases the drillstring  106  and is moved  178  clear of the drillstring  106 . 
     The grabber of the top drive  116  then grasps the drillstring  106  proximate the upper end of the drillstring  106 . The drive shaft  132  is moved into contact with the upper end of the drillstring  106  and is rotated via operation of the prime mover to make up a connection between the drillstring  106  and the drive shaft  132 . The grabber then releases the drillstring  106 , and the slips  180  are moved into the open position. Drilling may then resume. 
       FIG. 1  also depicts a pipe handling manipulator (PHM)  182  and a fingerboard  184  disposed on the rig floor  112 , although other implementations within the scope of the present disclosure may include one or both of the PHM  182  and the fingerboard  184  located elsewhere or excluded. The fingerboard  184  provides storage (e.g., temporary storage) of tubulars  194 , such that the PHM  182  can be operated to transfer the tubulars  194  from the fingerboard  184  for inclusion in the drillstring  106  during drilling or tripping-in operations, instead of (or in addition to) from the catwalk  166 , and similarly for transferring tubulars  194  removed from the drillstring  106  to the fingerboard  184  during tripping-out operations. 
     The PHM  182  includes arms and clamps  186  collectively operable for grasping and clamping onto a tubular  194  while the PHM  182  transfers the tubular  194  to and from the drillstring  106 , the fingerboard  184 , and the catwalk  166 . The PHM  182  is movable in at least one translation direction  188  and/or a rotational direction  190  around an axis of the PHM  182 . The arms of the PHM  182  can extend and retract along direction  192 . 
     The tubulars  194  conveyed to the rig floor  112  via the catwalk  166  (such as for subsequent transfer by the elevator  136  and/or the PHM  182  to the drillstring  106  and/or the fingerboard  184 ) may be single joints and/or double- or triple-joint stands, such as may be assembled prior to being fed onto the catwalk  166 . In other implementations, the catwalk  166  may include means for making/breaking the multi-joint stands. 
     The multi-joint stands may also be made up and/or broken out via cooperative operation of two or more of the top drive  116 , the drawworks  124 , the elevator  136 , the catwalk  166 , the iron roughneck  170 , the slips  180 , and the PHM  182 . For example, the catwalk  166  may position a first joint (drill pipe, casing, etc.) to extend above the rig floor  112  or another orientation where the joint can be grasped by the elevator  136 . The top drive  116 , the drawworks  124 , and the elevator  136  may then cooperatively transfer the first joint into the wellbore  104 , where the slips  180  may retain the first joint. The catwalk  166  may then position a second joint that will be made up with the first joint. The top drive  116 , the drawworks  124 , and the elevator  136  may then cooperatively transfer the second joint to proximate the upper end of the first joint extending up from the slips  180 . The iron roughneck  170  may then make up the first and second joints to form a double stand. The top drive  116 , the drawworks  124 , the elevator  136 , and the slips  180  may then cooperatively move the double stand deeper into the wellbore  104 , and the slips  180  may retain the double stand such that an upper end of the second joint extends upward. If the contemplated drilling, casing, or other operations are to utilize triple stands, the catwalk  166  may then position a third joint to extend above the rig floor  112 , and the top drive  116 , the drawworks  124 , and the elevator  136  may then cooperatively transfer the third joint to proximate the upper end of the second joint extending up from the slips  180 . The iron roughneck  170  may then make up the second and third joints to form a triple stand. The top drive  116  (or the elevator  136 ) and the drawworks  124  may then cooperatively lift the double or triple stand out of the wellbore  104 . The PHM  182  may then transfer the stand from the top drive  116  (or the elevator  136 ) to the fingerboard  184 , where the stand may be stored until retrieved by the PHM  182  for the drilling, casing, and/or other operations. This process of assembling stands may generally be performed in reverse to disassemble the stands. 
     A power distribution center  196  is also at the wellsite. The power distribution center  196  includes one or more generators, one or more AC-to-DC power converters, one or more DC-to-AC power inverters, one or more hydraulic systems, one or more pneumatic systems, the like, or a combination thereof. The power distribution center  196  can distribute AC and/or DC electrical power to various motors, pumps, and other components of the well construction system  100 . Similarly, the power distribution center  196  can distribute pneumatic and/or hydraulic power to various components of the well construction system  100 . Components of the power distribution center  196  can be centralized in the well construction system  100  or can be distributed among several locations within the well construction system  100 . 
     A control center  198  is also at the wellsite. The control center  198  houses one or more processing systems of a network of the well construction system  100 . Details of the network of the well construction system  100  are described below. Generally, various equipment of the well construction system  100 , such as the drilling fluid circulation system, the hoisting equipment, the top drive  116 , the PHM  182 , the catwalk  166 , etc., can have various sensors and controllers to monitor and control the operations of that equipment. Additionally, the control center  198  can receive information regarding the formation and/or downhole conditions from modules and/or components of the BHA  108 . 
     The BHA  108  can comprise various components with various capabilities, such as measuring, processing, and storing information. The BHA  108  may include a telemetry device  109  for communications with the control center  198 . The BHA  108  shown in  FIG. 1  is depicted as having a modular construction with specific components in certain modules. However, the BHA  108  may be unitary, or select portions thereof may be modular. The modules and/or components therein may be positioned in a variety of configurations within the BHA  108 . 
     For example, the BHA  108  may comprise one or more measurement-while-drilling (MWD) modules  200  that may include tools operable to measure wellbore trajectory, wellbore temperature, wellbore pressure, and/or other example properties. The BHA  108  may comprise one or more logging-while-drilling (LWD) modules  202  that may include tools operable to measure formation parameters and/or fluid properties, such as resistivity, porosity, permeability, sonic velocity, optical density, pressure, temperature, and/or other example properties. The BHA  108  may comprise one or more sampling-while-drilling (SWD) modules  204  for communicating a formation fluid through the BHA  108  and obtaining a sample of the formation fluid. The SWD module(s)  204  may comprise gauges, sensor, monitors and/or other devices that may also be utilized for downhole sampling and/or testing of a formation fluid. 
     A person having ordinary skill in the art will readily understand that well construction systems other than the example depicted in  FIG. 1  may include more, less, and/or different equipment than as described herein and/or depicted in the figures, but may still be within the scope of the present disclosure. Additionally, various equipment and/or systems of the well construction systems within the scope of the present disclosure may include more, less, and/or different equipment than as described herein and/or depicted in the figures. For example, various engines, motors, hydraulics, actuators, valves, or the like that are not described herein and/or depicted in the figures may be included in other implementations of equipment and/or systems also within the scope of the present disclosure. The well construction systems within the scope of the present disclosure may also be implemented as land-based rigs or offshore rigs. 
     The equipment and/or systems of well construction systems within the scope of the present disclosure may be transferrable via land-based movable vehicles, such as trucks and/or trailers. For example, the mast  114 , the PHM  182  (and associated frame), the drawworks  124 , the fingerboard  184 , the power distribution center  196 , the control center  198 , the mud tanks  164  (and associated pump  142 , shale shaker  160 , and reconditioning equipment  162 ), and the catwalk  166 , among other examples, may each be transferrable by a separate truck and trailer combination. Some of the equipment and/or systems may be collapsible to accommodate transfer on a trailer. For example, the mast  114 , the fingerboard  184 , the catwalk  166 , and/or other equipment and/or systems may be telescopic, folding, and/or otherwise collapsible. Other equipment and/or systems may be collapsible by other techniques, or may be separable into subcomponents for transportation purposes. 
       FIG. 2  is a schematic view of at least a portion of another example implementation of a well construction system  250  operable to drill a wellbore  104  into a subsurface formation  102  at a wellsite in accordance with one or more aspects of the present disclosure. Some of the components and operation of those components are common (as indicated by usage of common reference numerals) between the well construction systems  100  and  250  of  FIGS. 1 and 2 , respectively. Hence, description of the common components may be omitted here for brevity, although a person of ordinary skill in the art will readily understand the components and their operation in the well construction system  250  of  FIG. 2 . 
     A swivel  256  and kelly  254  are suspended from the mast  114  via the hoisting equipment. The hook  120  mechanically couples with the swivel  256 , although other means for coupling the traveling block  118  with the swivel  256  are also within the scope of the present disclosure. The kelly  254  is detachably mechanically coupled to the drillstring  106 . A kelly spinner is between the kelly  254  and the swivel  256 , although not specifically illustrated. The kelly  254  extends through an opening  253  through a master bushing (not specifically depicted) in the rig floor  112  and a kelly bushing  258  that engages the master bushing and the kelly  254 . The rig floor  112  includes a rotary table that includes the master bushing and a prime mover. The prime mover of the rotary table, through the master bushing and the kelly bushing  258 , provides a rotational force to drive rotational movement of the drillstring  106  to form the wellbore  104 . 
     Similar to as described above with respect to  FIG. 1 , the pump  142  delivers drilling fluid through, for example, the discharge line  144 , the standpipe  146 , and the hose  148  to a port  257  of the swivel  256 . The drilling fluid is then conducted through the kelly  254  and the drillstring  106  to the drill bit  110 . 
     Although not illustrated, tongs, a cathead, and/or a spinning wrench or winch spinning system may be used for making up and/or breaking out connections of tubulars. A winch spinning system may include a chain, rope, or the like that is driven by a winch. The spinning wrench or winch spinning system may be operable for applying low-torque spinning to make up and/or break out a threaded connection between tubulars of the drillstring  106 . For example, with a winch spinning system, a human roughneck can wrap a chain around a tubular, and the chain is pulled by the winch to spin the tubular to make up and/or break out a connection. The tongs and cathead can be used to apply higher torque to make up and/or break out the threaded connection. For example, a human roughneck can manually apply tongs to tubulars, and the cathead mechanically coupled to the tongs (such as by chains) can apply a high torque to make up and/or break out the threaded connection. 
     Removable slips may be used in securing the drillstring  106  when making up and/or breaking out a connection. For example, a human operator may place the slips between the drillstring  106  and the rig floor  112  and/or the master bushing of the rotary table to suspend the drillstring  106  in the wellbore  104  during make up and/or break out. 
     To form the wellbore  104  (e.g., “make hole”), the hoisting equipment lowers the drillstring  106  while the prime mover of the rotary table rotates the drillstring  106  via the master bushing and kelly bushing  258 . During this advancement of the drillstring  106 , removable slips are removed from the opening  253 , and the tongs are clear of the drillstring  106 . When the upper end of the kelly  254  nears the kelly bushing  258  and/or rig floor  112 , the hoisting equipment ceases downward movement of the kelly  254 , and the rotary table ceases rotating the drillstring  106 . The hoisting equipment raises the kelly  254  until the upper end of the drillstring  106  protrudes from the master bushing and/or rig floor  112 , and the slips are placed in the opening  253  between the drillstring  106  and the master bushing and/or rig floor  112  to clamp the drillstring  106 . When the kelly  254  is raised, a flange at the bottom of the kelly  254  can grasp the kelly bushing  258  to clear the kelly bushing  258  from the master bushing. Human operators can then break out the connection between the kelly  254  and the drillstring  106  using the tongs and cathead for applying a high torque, and the prime mover of the rotary table can cause the drillstring  106  to rotate to spin out of the connection to the kelly  254 , for example. 
     A tubular may be positioned in preparation to being made up to the kelly  254  and the drillstring  106 . For example, a tubular may be manually transferred to a mouse hole in the rig floor  112 . Other methods and systems for transferring a tubular may be used. 
     With the connection between the drillstring  106  and the kelly  254  broken out, the hoisting equipment maneuvers the kelly  254  into a position such that a connection between the kelly  254  and the tubular projecting through the mouse hole can be made up. Operators can then make up the connection between the kelly  254  and the tubular by spinning the kelly  254  with the kelly spinner and by using the tongs and cathead. The hoisting equipment then raises and maneuvers the kelly  254  and attached tubular into a position such that a connection between the attached tubular and drillstring  106  can be made up. Operators can then make up the connection between the tubular and the drillstring  106  by clamping one of the tongs to the tubular and spinning the kelly  254  with the kelly spinner and by using the tongs and cathead. The slips are then removed from the opening  253 , and the drillstring  106  and kelly  254  are lowered by the hoisting equipment until the drill bit  110  engages the one or more subsurface formations  102 . The kelly bushing  258  engages the master bushing and the kelly  254 . Drilling may then resume. 
     A power distribution center  196  and control center  198  are also at the wellsite as described above. The control center  198  houses one or more processing systems of a network of the well construction system  250 . Details of the network of the well construction system  250  are described below. Generally, various equipment of the well construction system  250 , such as the drilling fluid circulation system, the hoisting equipment, the rotary table, etc., can have various sensors and controllers to monitor and control the operations of that equipment. Additionally, the control center  198  can receive information regarding the formation and/or downhole conditions from modules and/or components of the BHA  108 . The BHA  108  can comprise various components with various capabilities, such as measuring, processing, and storing information, as described above. 
     A person having ordinary skill in the art will readily understand that a well construction system may include more or fewer equipment than as described herein and/or depicted in the figures. Additionally, various equipment and/or systems of the example implementation of the well construction system  250  depicted in  FIG. 2  may include more or fewer equipment. For example, various engines, motors, hydraulics, actuators, valves, or the like that were not described above and/or depicted in  FIG. 2  may be included in other implementations of equipment and/or systems also within the scope of the present disclosure. 
     Additionally, the well construction system  250  of  FIG. 2  may be implemented as a land-based rig or on an offshore rig. One or more aspects of the well construction system  250  of  FIG. 2  may be incorporated in and/or omitted from a land-based rig or an offshore rig. Such modifications are within the scope of the present disclosure. 
     One or more equipment and/or systems of the well construction system  250  of  FIG. 2  may be transferrable via a land-based movable vessel, such as a truck and/or trailer. For example, the mast  114 , the drawworks  124 , the fingerboard  184 , the power distribution center  196 , the control center  198 , mud tanks  164  (and associated pump  142 , shale shaker  160 , and reconditioning equipment  162 ), and/or other examples may each be transferrable by a separate truck and trailer combination. Some of the equipment and/or systems may be collapsible to accommodate transfer on a trailer. For example, the mast  114 , the fingerboard  184 , and/or other equipment and/or systems may be telescopic, folding, and/or otherwise collapsible. Other equipment and/or systems may be collapsible by other techniques, or may be separable into subcomponents for transportation purposes. 
     The well construction systems  100  and  250  of  FIGS. 1 and 2 , respectively, illustrate various example equipment and systems that may be incorporated in a well construction system. Various other example well construction systems may include another combination of equipment and systems described with respect to the well construction systems  100  and  250  of  FIGS. 1  and  2 , respectively, and may omit some equipment and/or systems and/or include additional equipment and/or systems not specifically described herein. Such well construction systems are within the scope of the present disclosure. 
       FIG. 3  is a schematic view of at least a portion of an example implementation of an operations network  300  according to one or more aspects of the present disclosure. The physical network used to implement the operations network  300  of  FIG. 3  can have a network topology, such as a bus topology, a ring topology, a star topology, and/or mesh topology, among other examples also within the scope of the present disclosure. The operations network  300  can include one or more processing systems, such as one or more network appliances (like a switch or other processing system), that are configured to implement various virtual networks, such as virtual local area networks (VLANs). Additionally, the operations network  300  can include one or more processing systems, such as one or more network appliances (like a switch or other processing system), that are configured with an intrusion detection system (IDS) to monitor traffic across the operations network  300 , such as may be in respective virtual networks. The IDS can alert personnel to potential cyber security breaches that may occur on the operations network  300 . 
     The operations network  300  includes a configuration manager  302 , which may be a software program instantiated and operable on one or more processing systems, such as one or more network appliances. The configuration manager  302  may be a software program written in and compiled from a high-level programming language, such as C/C++ or the like. As described in further detail below, the configuration manager  302  is operable to translate communications from various communications protocols to a common communication protocol and make the communications translated to the common communication protocol available through a common data bus, and vice versa. The common data bus may include an application program interface (API) of the configuration manager  302  and/or a common data virtual network (VN-DATA) implemented on one or more processing systems, such as network appliances like switches. 
     The configuration manager  302  can have predefined classes for objects to implement the translations of communication. Instantiated objects in the configuration manager  302  for subsystems can be used to receive communications from the subsystems according to respective (and possibly different) communication protocols implemented by the subsystems, and to translate the communications to a common protocol, which is made available on the common data bus, and vice versa. The classes can define objects at the subsystem level (e.g., drilling control system, drilling fluid circulation system, cementing system, etc.), the equipment level (e.g., top drive, drawworks, drilling fluid pump, etc.), and/or the data level (e.g., type of commands, sensor data, and/or status data). Hence, an object can be instantiated for each instance of a subsystem, equipment, and/or data type depending on how the class of the object was defined. Further, the classes can define objects based on the communication protocols to be implemented by the subsystems. Hypothetically, assuming two subsystems that are identical except that each implements a different communication protocol, the configuration manager  302  may instantiate objects for the subsystems from different classes that were defined based on the different communication protocols. Objects can be instantiated at set-up of the operations network  300  and/or by dynamically detecting ECs and/or subsystems. 
     As will become apparent from description below, using a configuration manager, such as the configuration manager  302  in  FIG. 3 , may permit simpler deployment of subsystems in a well construction system and associated communications equipment, for example. The use of a software program compiled from a high-level language may permit deployment of an updated version of a configuration manager when an additional, previously undefined subsystem is deployed, which may alleviate deployment of physical components associated with the configuration manager (e.g., when adding equipment/subsystems to the well construction system). Further, applications that access data from the configuration manager (e.g., through the common data bus) can be updated through a software update when new data becomes available by the addition of a new subsystem, such that the updated application can consume data generated by the new subsystem. 
     One or more processing systems of the operations network  300 , such as one or more switches and/or other network appliances, are configured to implement one or more subsystem virtual networks (e.g., VLANs), such as a first subsystem virtual network (VN-S1)  304 , a second subsystem virtual network (VN-S2)  306 , and an Nth subsystem virtual network (VN-SN)  308  as illustrated in  FIG. 3 . More or fewer subsystem virtual networks may be implemented. The subsystem virtual networks (e.g., VN-S1  304 , VN-S2  306 , and VN-SN  312 ) are logically separate from each other. The subsystem virtual networks can be implemented according to the IEEE 802.1Q standard, another standard, or a proprietary implementation. Each subsystem virtual network can implement communications with the EC(s) of the respective subsystem based on various protocols, such as an Ethernet-based network protocol (such as ProfiNET, OPC, OPC/UA, Modbus TCP/IP, EtherCAT, UDP multicast, Siemens S7 communication, or the like), a proprietary communication protocol, and/or another communication protocol. Further, the subsystem virtual networks can implement publish-subscribe communications. The subsystem virtual networks can implement the same protocol, each subsystem virtual network can implement a different protocol, or a combination therebetween. 
     In the example depicted in  FIG. 3 , a first control subsystem (S1)  310 , a second control subsystem (S2)  312 , and an N th  control subsystem (SN)  314  are various control subsystems of a well construction system. Example subsystems include a drilling fluid circulation system (which may include mud pumps, valves, fluid reconditioning equipment, etc.), a rig control system (which may include hoisting equipment, drillstring rotary mover equipment (such as a top drive and/or rotary table), a PHM, a catwalk, etc.), a managed pressure drilling system, a cementing system, a rig walk system, etc. A subsystem may include a single piece of equipment, or may include multiple pieces of equipment that, for example, that are jointly used to perform one or more functions. Each subsystem includes one or more ECs, which may control equipment of the subsystem and/or receive sensor and/or status data from sensors and/or equipment of the subsystem. In the example depicted in  FIG. 3 , the S1  310  includes a first S1 EC (EC-S1-1)  318 , a second S1 EC (EC-S1-2)  320 , a third S1 EC (EC-S1-3)  322 , and a fourth S1 EC (EC-S1-4)  324 . The S2  312  includes a first S2 EC (EC-S2-1)  326  and a second S2 EC (EC-S2-2)  328 . The SN  314  includes a first SN EC (EC-SN-1)  330 , a second SN EC (EC-SN-2)  332 , and a third SN EC (EC-SN-3)  334 . Other numbers of control subsystems may be implemented, and other numbers of ECs may be used in each control subsystem. Some example control subsystems are described below following description of various aspects of  FIG. 3 . 
     Each EC can implement logic to monitor and/or control one or more sensors and/or one or more controllable components of the respective subsystem. Each EC can include logic to interpret a command and/or other data, such as from one or more sensors or controllable components, and to communicate a signal to one or more controllable components of the subsystem to control the one or more controllable components in response to the command and/or other data. Each EC can also receive a signal from one or more sensors, and can reformat the signal (e.g., from an analog signal to a digital signal) into interpretable data. The logic for each EC can be programmable, such as compiled from a low-level programming language, such as described in IEC 61131 programming languages for PLCs, structured text, ladder diagram, functional block diagrams, functional charts, or the like. 
     As also illustrated in the example depicted in  FIG. 3 , a downhole system (DH)  316  is an example sensor system of the well construction system. The DH  316  includes surface equipment  336  that is communicatively coupled to a bottom hole assembly (BHA) on a drillstring (e.g., the BHA  108  of the drillstring  106  in  FIGS. 1 and 2 ). The surface equipment  336  receives (e.g., via telemetry equipment) data from the BHA, such as data relating to conditions in the wellbore, conditions of the subterranean formation  102 , and/or conditions/parameters of components of the BHA, among other examples. The surface equipment  336  in this example does not control operations of equipment. Other sensor subsystems may also or instead be included in the operations network  300 . 
     The operations network  300  includes a coordinated controller  338 , which may be a software program instantiated and operable on one or more processing systems, such as one or more network appliances. The coordinated controller  338  may be a software program written in and compiled from a high-level programming language, such as C/C++ or the like. The coordinated controller  338  can control operations of subsystems and communications as described in further detail below. 
     The operations network  300  also includes one or more human-machine interfaces (HMIs), such as the HMI  340  in the example implementation depicted in  FIG. 3 . The HMI  340  may be, comprise, or be implemented by one or more processing systems with a keyboard, a mouse, a touchscreen, a joystick, one or more control switches or toggles, one or more buttons, a track-pad, a trackball, an image/code scanner, a voice recognition system, a display device (such as a liquid crystal display (LCD), a light-emitting diode (LED) display, and/or a cathode ray tube (CRT) display), a printer, speaker, and/or other examples. A human operator may use the HMI  340  for entry of commands to the coordinated controller  338 , and the HMI  340  may permit visualization or other sensory perception of various data, such as sensor data, status data, and/or other example data. The HMI may be a part of a control subsystem, and may issue commands through a subsystem virtual network to one or more of the ECs of that subsystem virtual network without using the coordinated controller  338 . Each HMI can be associated with and control a single or multiple subsystems. An HMI may also or instead control an entirety of the system that includes each subsystem. 
     The operations network  300  also includes a historian  342 , which may be a database maintained and operated on one or more processing systems, such as database devices, for example. The historian  342  may be distributed across multiple processing systems and/or may be maintained in memory, which can include external storage, such as a hard disk or drive. The historian  342  may access sensor data and/or status data, which is stored and maintained in the historian  342 . 
     The operations network  300  further includes one or more process applications  344 , which may each or collectively be a software program instantiated and operable on one or more processing systems, such as one or more server devices and/or other network appliances. The process applications  344  may each be a software program written in and compiled from a high-level programming language, such as C/C++ or the like. The process applications  344  may analyze data and output one or more job plans to the coordinated controller  338 , and/or may monitor data that is accessible and/or consumed from the common data bus. An example of the process applications  344  can include a drilling operation plan, and another example can include a cementing operation plan. Various job plans can be self-contained, or can refer to one or more other plans. 
     Processing systems that process data for control of various subsystems can have resources dedicated for such processing. For example, the one or more processing systems on which the coordinated controller  338  operates, the one or more processing systems on which the configuration manager  302  operates, the one or more processing systems that are configured to implement the virtual networks, and/or other processing systems may have resources dedicated to processing and communicating commands and/or sensor and/or status data used to determine appropriate commands to issue. By dedicating resources in this manner, control of processes in the well construction system may be real-time. Other communications and processing may be may be handled in a non-real-time manner without using dedicated resources. 
     Referring to communications within the operations network  300 , each EC within a control subsystem can communicate with other ECs in that control subsystem through the subsystem virtual network for that control subsystem (e.g., through processing systems configured to implement the subsystem virtual network). Sensor data, status data, and/or commands from an EC in a subsystem can be communicated to another EC within that subsystem through the subsystem virtual network for that subsystem, for example, which may occur without intervention of the coordinated controller  338 . As an example from the example operations network  300  depicted in  FIG. 3 , EC-S1-1  318  can communicate sensor data, status data, and/or commands to EC-S1-3  322  via VN-S1  304 , and vice versa, without intervention of the coordinated controller  338 . Other ECs within a subsystem can similarly communicate through their respective subsystem virtual network. 
     Communications from a subsystem virtual network to another processing system outside of that subsystem and respective subsystem virtual network can be translated from the communications protocol used for that subsystem virtual network to a common protocol (e.g., data distribution service (DDS) protocol or other examples) by the configuration manager  302 . The communications that are translated to a common protocol may also be available to other processing systems via the common data bus, for example. Sensor data and/or status data from the control subsystems (e.g., S1  310 , S2  312 , and SN  314 ) may be available (e.g., directly available) for consumption by ECs of different subsystems, the coordinated controller  338 , the HMI  340 , the historian  342 , and/or the process applications  344  via the common data bus. ECs may also communicate sensor data and/or status data to another EC in another subsystem via the common data bus. For example, if a sensor in the S1  310  communicates a signal to the EC-S1-1  318 , and the data generated from that sensor is also used by the EC-S2-1  326  in the S2  312  to control one or more controllable components of the S2  312 , the sensor data can be communicated from the EC-S1-1  318  via the VN-S1  304 , the common data bus, and the VN-S2  306  to the EC-S2-1  326 . Other ECs within various subsystems can similarly communicate sensor data and/or status data through the common data bus to one or more other ECs in different subsystems. Similarly, for example, if one or more of the process applications  344  consume data generated by a sensor coupled to the EC-S1-1  318  in the S1  310 , the sensor data can be communicated from the EC-S1-1  318  via the VN-S1  304  and the common data bus, where the one or more process applications  344  can access and consume the sensor data. 
     Similarly, communications from a sensor subsystem (e.g., the DH  316 ) can be translated from the communications protocol used for that sensor subsystem to the common protocol by the configuration manager  302 . The communications that are translated to a common protocol can be made available to other processing systems via the common data bus, for example. Similar to above, sensor data and/or status data from the sensor subsystem may be available (e.g., directly available) for consumption by ECs of control subsystems, the coordinated controller  338 , the HMI  340 , the historian  342 , and/or the process applications  344  via the common data bus. 
     The coordinated controller  338  can also implement logic to control operations of the well construction system. The coordinated controller  338  can monitor various statuses of components and/or sensors and can issue commands to various ECs to control the operation of the controllable components within one or more subsystems. Sensor data and/or status data can be monitored by the coordinated controller  338  via the common data bus, and the coordinated controller  338  can issue commands to one or more ECs via the respective subsystem virtual network of the EC. 
     The coordinated controller  338  can implement logic to generate commands based on a job plan from one or more process applications  344 , and to issue those commands to one or more ECs in one or more subsystems. The one or more process applications  344  may communicate a generalized command to the coordinated controller  338 , such as through the common data bus. The generalized command may include an intended general operation (e.g., drilling into a formation) and defined constraints of parameters that can affect the operation. For example, the defined constraints for a drilling operation may include a desired function of rate of penetration (ROP) of the drilling related to a top drive revolutions per minute (RPM) and weight on bit (WOB). The coordinated controller  338  may interpret the generalized command and translate it to specified commands (that are interpretable by appropriate ECs) that are then issued to ECs to control various controllable components. 
     The coordinated controller  338  can further monitor the status of various equipment and/or sensor data to optimize operations of equipment of subsystems based on the status and/or sensor data that is fed back. By feeding back and monitoring data of the environment of the well construction, the coordinated controller  338  can continuously update commands to account for a changing environment. For example, if the ROP is greater or less than anticipated by the plan, the coordinated controller  338  can calculate and issue commands to increase or decrease one or both of top drive RPM and WOB. 
     Similarly, one or more of the process applications  344  can monitor status and/or sensor data available through the common data bus to monitor a progression of an operation, and/or to update a job plan based on a changing environment. If the operation progresses as planned within the various constraints, for example, the process applications  344  may not update the job plan and can permit operations to continue based on the job plan that is being implemented. If the operation progresses differently from what was planned, which may be indicated by the status and/or sensor data, the process applications  344  may alter the job plan and communicate the altered job plan to the coordinated controller  338  for implementation. 
       FIG. 4  is a flow-chart diagram of at least a portion of an example implementation of a method ( 400 ) for controlling operations of a well construction system according to one or more aspects of the present disclosure. The method ( 400 ) may be performed by, utilizing, or otherwise in association with one or more features depicted in one or more of  FIGS. 1-3  described above, one or more features depicted in  FIGS. 7 and/or 9  described below, and/or one or more features otherwise within the scope of the present disclosure. However, for the sake of simplicity, the method ( 400 ) is described below in the context of the example implementation depicted in  FIG. 3  and/or otherwise described above, and a person having ordinary skill in the art will recognize that the following description of the method ( 400 ) is also applicable or readily adaptable for operations networks other than the example operations network  300  depicted in  FIG. 3 . 
     The method ( 400 ) may include developing ( 402 ) a job plan, such as by one or more of the process applications  344 . The job plan may be developed ( 402 ) based on geological and/or geophysical data measured or otherwise believed to be descriptive of the target formation(s) of the well being constructed, and/or one or more geological, geophysical, and/or engineering databases. The developed ( 402 ) job plan may include details pertaining to the trajectory of the well, the mud to be used during drilling, casing design, drill bits, BHA components, and the like. 
     The method ( 400 ) includes implementing ( 404 ) the job plan, such as by the coordinated controller  338  as described above. Implementing ( 404 ) the job plan may comprise operating (and/or causing the operation of) the well construction system to form the well according to the developed ( 402 ) job plan. The operation details (e.g., WOB, top drive RPM, mud flow rate, etc.) may be determined during the development ( 402 ) and/or implementation ( 404 ) of the job plan. 
     The method ( 400 ) also includes monitoring ( 406 ) status and/or sensor data, such as by one or more of the process applications  344  and the coordinated controller  338 , as the job operations continue. The method ( 400 ) also includes determining ( 408 ) whether the implementation of the job plan should be updated based on the monitored ( 406 ) status and/or sensor data. The coordinated controller  338  may perform the determination ( 408 ). The determination ( 410 ) may be based on one or more indications in (or derived from) the monitored ( 406 ) status and/or sensor data that the operations are deviating from an intended progression of the job plan implementation ( 404 ), and/or that the initial job plan implementation ( 404 ) was faulty in light of new data. If the determination ( 408 ) is that the implementation will not be updated, operations continue while monitoring ( 406 ) the status and/or sensor data, such as by the coordinated controller  338 . If the determination ( 408 ) is that the implementation will be updated, the existing job plan implementation ( 404 ) is updated ( 409 ) based on the monitored ( 406 ) status and/or sensor data, such as by the coordinated controller  338 . The status and/or sensor data monitoring ( 406 ) and job operations then continue. 
     The method ( 400 ) also comprises determining ( 410 ) whether the job plan should be updated based on the monitored ( 406 ) status and/or sensor data. One or more of the process applications  344  may perform the determination ( 410 ). The determination ( 410 ) may be based on one or more indications in (or derived from) the monitored ( 406 ) status and/or sensor data that the operations are deviating from an anticipated progression of the job plan, and/or that the initially developed ( 402 ) job plan was faulty in light of new data. If the determination ( 410 ) is that the job plan will not be updated, operations continue while monitoring ( 406 ) the status and/or sensor data, such as by one or more of the process applications  344 . If the determination ( 410 ) is that the job plan will be updated, the job plan is updated (based on the monitored ( 406 ) status and/or sensor data) and implemented ( 411 ), such as by one or more of the process applications  344 . The status and/or sensor data monitoring ( 406 ) and job operations then continue. The method ( 400 ) may continue until the initially developed ( 402 ) or updated ( 411 ) job plan is completed. 
     Developing a job plan may be calculation intensive, and may thus be developed over a longer period of time, which may not be real-time to the operations. The coordinated controller  338  (e.g., the one or more processing systems on which the coordinated controller  338  operates) may have resources (e.g., processing resources) dedicated to control of various systems, which permit such control to be real-time (e.g., within a known, determinable period of time). Further, the implementation may be updated by simpler processes, which may permit real-time updates to the implementation. The real-time updates may permit optimized control of operations being implemented by a job plan. 
     The coordinated controller  338  can control issuance of commands to ECs generated in response to an actor outside of the ECs&#39; respective subsystem virtual networks. Thus, for example, the HMI  340  can issue a command to one or more ECs in a subsystem through the common data bus under the control of the coordinated controller  338  and through the subsystem virtual network of that subsystem. For example, a user may input commands through the HMI  340  to control an operation of a subsystem. Commands to an EC of a subsystem from an actor outside of that subsystem may be prohibited in the operations network  300  without the coordinated controller  338  processing the command. The coordinated controller  338  can implement logic to determine whether a given actor (e.g., the HMI  340  and/or process applications  344 ) can cause a command to be issued to a given EC in a subsystem. 
     The coordinated controller  338  can implement logic to arbitrate commands that would control the operation of a particular equipment or subsystem, such as when there are multiple actors (e.g., job plans and/or HMIs) attempting to cause commands to be issued to the same equipment or subsystem at the same time. The coordinated controller  338  can implement an arbiter (e.g., logic) to determine which of conflicting commands from HMIs and/or job plans to issue to an EC. For example, if a first job plan attempts to have a command issued to the EC-SN-1  330  to increase a pumping rate of a pump, and a second job plan simultaneously attempts to have a command issued to the EC-SN-1  330  to decrease the pumping rate of the same pump, the arbiter of the coordinated controller  338  can resolve the conflict and determine which command is permitted to be issued. Additionally, as an example, if two HMIs issue conflicting commands simultaneously, the coordinated controller  338  can determine which command to prohibit and which command to issue. 
     The arbiter of the coordinated controller  338  may operate using a hybrid first in, first served and prioritization scheme. For example, the first command that is issued is permitted to operate to completion or until the actor that caused the command to be issued terminates the execution of that command. In some examples, a single, self-contained job plan that is to be executed alone without the execution of another job plan can generally be implemented without generating conflicting commands. However, a job plan may refer to another job plan, which may result in conflicting commands being generated. For example, a job plan for a cementing process can refer to a job plan for a drilling process in order to operate a pump, and by executing the job plan for the cementing process that refers to the job plan for the drilling process, multiple conflicting commands may be generated for the pump by operation of the two job plans. The arbiter handles these commands by permitting the first command that is generated by one of the job plans to be completed or until the generating job plan terminates the first command, even though a second subsequent and conflicting command is generated by the other of the job plans. The second command is placed in a queue until the first command is completed or terminated by its generating job plan, and then the arbiter permits the second command to be issued and executed. 
     Some actors within the operations network  300  may be assigned a priority that permits those actors to interrupt operations and/or commands regardless of the current state of the process. For example, an HMI can be assigned a high priority that permits a command from the HMI to interrupt an operation and/or command that is being executed. The command from the HMI may be executed, despite the current state of the process, until the command is completed or terminated by the sending HMI. After the command from the HMI has been executed, the process may return to its previous state or restart based on new conditions on which the job plan and/or implementation of the job plan is based. 
       FIG. 5  is a flow-chart diagram of at least a portion of an example implementation of a method ( 500 ) for controlling operations of a well construction system, including implementing an arbiter, according to one or more aspects of the present disclosure. The method ( 500 ) may be performed by, utilizing, or otherwise in association with one or more features depicted in one or more of  FIGS. 1-3  described above, one or more features depicted in  FIGS. 7 and/or 9  described below, and/or one or more features otherwise within the scope of the present disclosure. However, for the sake of simplicity, the method ( 500 ) is described below in the context of the example implementation depicted in  FIG. 3  and/or otherwise described above, and a person having ordinary skill in the art will recognize that the following description of the method ( 500 ) is also applicable or readily adaptable for operations networks other than the example operations network  300  depicted in  FIG. 3 . Also, as described in more detail below, the method ( 500 ) may not flow linearly as illustrated in  FIG. 5 . 
     The method ( 500 ) includes receiving ( 502 ) one or more commands generated from one or more non-prioritized actors. For example, an arbiter can receive one or more commands that have been generated from one or more job plans, which may be non-prioritized. The method ( 500 ) includes issuing ( 504 ) the earliest received, non-issued command. For example, the arbiter can effectively queue commands from non-prioritized actors, and the first command received from a non-prioritized actor is the first command that is issued by the arbiter. The method ( 500 ) comprises executing ( 506 ) the issued command until the command is completed or terminated by the sending actor. The execution ( 506 ) of the issued command may be a discrete, instantaneous function by equipment, a function performed by equipment over a defined duration, a function performed by equipment until defined conditions are met (which may be indicated by the sending actor), and/or other example means of execution. The method ( 500 ) then loops back to issuing ( 504 ) the earliest received, non-issued command. During the issuance ( 504 ) and the execution ( 506 ), commands can continue to be received ( 502 ) from one or more non-prioritized actors, which commands are queued for issuance. Hence, the receiving ( 502 ), issuing ( 504 ), and executing ( 506 ) may implement a first in, first served type of queue. 
     During the receiving ( 502 ), issuing ( 504 ), and executing ( 506 ), the method ( 500 ) includes receiving ( 508 ) a command from a prioritized actor. The receipt ( 508 ) of a command from a prioritized actor interrupts the flow of the receiving ( 502 ), issuing ( 504 ), and executing ( 506 ) commands from non-prioritized actors, and hence, the command from the prioritized actor has priority over commands from non-prioritized actors. Example prioritized actors can include HMIs or others. The method ( 500 ) includes issuing ( 510 ) the command received from the prioritized actor, and executing ( 512 ) the issued command until the command is completed or terminated by the sending actor. The execution ( 512 ) of the issued command may be a discrete, instantaneous function by equipment, a function performed by equipment over a defined duration, a function performed by equipment until defined conditions are met (which may be indicated by the sending actor), and/or other example means of execution. 
     After the execution ( 512 ) of the command received ( 508 ) from the prioritized actor, the method ( 500 ) may resume at various instances. For example, after the execution ( 512 ), the method ( 500 ) may resume at the instance where the receipt ( 508 ) of the command from the prioritized actor interrupted the flow of the receiving ( 502 ), issuing ( 504 ), and executing ( 506 ) one or more commands received from one or more non-prioritized actors. Additionally, the execution ( 512 ) of the command received ( 508 ) from the prioritized actor can change conditions at the wellsite to an extent that non-prioritized actors withdraw previously sent commands and begin sending commands that are updated in response to the conditions that changed as a result of the execution ( 512 ) of the command from the prioritized actor. Thus, the method ( 500 ) may resume at receiving ( 502 ) one or more commands from one or more non-prioritized actors regardless of the instance when the receipt ( 508 ) of the command from the prioritized actor occurred. 
     In some examples of the implementation of the example method ( 500 ) of  FIG. 5 , the arbiter receives ( 502 ,  508 ) and issues ( 504 ,  510 ) the commands, which commands may be received from other logic of the coordinated controller  338  that implements one or more job plans received from one or more process applications  344 . The arbiter can determine which commands the coordinated controller  338  is to issue to one or more ECs, and the ECs may execute ( 506 ,  512 ) the commands by controlling various equipment of the well construction system at the wellsite, for example. Other components and/or processing systems can implement various operations in other examples. 
     By permitting different subsystems to communicate as described above, a single clock may be used to synchronize multiple clocks of the processing systems of the operations network  300 . For example, the coordinated controller  338  may periodically synchronize the clock of its one or more processing systems with a clock of a Global Positioning System (GPS) or other system. The coordinated controller  338  may then cause clocks of other processing systems of the operations network  300  to be synchronized with the clock of the coordinated controller  338 . This synchronization process permits time stamps of, e.g., commands and sensor and/or status data to be synchronized to a single clock. This may permit improved control, in that conversion between clocks may be obviated for issuance of commands, for example. Further, data stored and maintained on the historian  342 , for example, may be interpreted more easily by personnel. 
     When an additional subsystem is added to the operations network  300 , and/or when an additional EC is added to an existing subsystem of the operations network  300 , such that the new subsystem and/or EC is connected to the physical network, the configuration manager  302  may automatically instantiate one or more respective objects of the predefined classes corresponding to the new subsystem and/or EC to permit communications to and from the new subsystem and/or EC to be communicated through the common data bus. For example, after the operations network  300  is initiated and begins operation, a new (albeit predefined in the configuration manager  302 ) EC may subsequently be connected to the physical network of the operations network  300 . The new EC may be for new equipment that is to become part of an existing subsystem, for equipment of a new subsystem, and/or for other situations. For example, a new EC for a new pump may be added to an existing drilling fluid circulation system, or a new EC for equipment may be added to create a new cementing system, among other examples. When the EC becomes connected to the physical network, the EC can communicate its presence through the physical network, such as by a multicast or broadcast message. The configuration manager  302  can receive the communication and, based on this communication (and possibly subsequent communications with the EC), the configuration manager  302  can instantiate a new object based on the type of equipment and/or subsystem with which the EC is used. After this object is instantiated, the EC can communicate through the common data bus to communicate sensor and/or status data to the common data bus and/or to receive commands through the common data bus. 
     The new subsystem and/or EC can be segmented into an existing virtual network or in a newly created virtual network. For example, during the set-up of the operations network  300 , various unused ports of switches and/or other network appliances may be mapped to various virtual networks (e.g., VLANs), some of which virtual networks may be used upon initiating the operations network  300 , and some of which may be allocated for future use upon initiating the operations network  300 . The new EC can be connected to a previously unused port that is mapped to a virtual network that is in use for an existing subsystem for the EC to become part of that subsystem, or the new EC can be connected to a previously unused port that is mapped to a virtual network that was allocated for future use to create a new subsystem. In other example implementations, other segmentation techniques may be used, such as dynamic domain segmentation. 
       FIG. 6  is a flow-chart diagram of at least a portion of an example implementation of a method ( 600 ) for connecting an EC (and/or similarly for connecting a subsystem) to an existing network of a well construction system according to one or more aspects of the present disclosure. The method ( 600 ) includes connecting ( 602 ) the EC to the physical network of the operations network  300 . As described above, connecting ( 602 ) the EC can include connecting the EC to an existing port of a network appliance of the operations network  300 , which may be configured to implement a virtual network. 
     The method ( 600 ) then includes announcing ( 604 ), by the EC (or another data processing system, such as one implementing a gateway when used in a different network), its presence on the physical network. The EC can announce ( 604 ) its presence by transmitting a multicast message, broadcast message, and/or other communication through the physical network. The configuration manager  302  receives the communication from the EC announcing ( 604 ) its presence, and then, the method ( 600 ) includes handshaking ( 606 ) between the EC and the configuration manager  302 . The handshaking ( 606 ) can establish a communication channel between the EC and the configuration manager  302  and can further permit the EC to identify itself, such as including a type of equipment and/or subsystem with which the EC is associated. For example, the EC may establish that it is associated with a new pump that is to be a part of the existing drilling fluid circulation system. 
     The method ( 600 ) includes determining ( 608 ) whether the EC is authorized to be on the operations network  300 . This may be part of the handshaking ( 606 ) between the EC and the configuration manager  302 . The determination ( 608 ) may be based on one or more conditions. Example conditions that may cause the EC to be unauthorized can include that the EC and/or its associated equipment may not be recognizable by the configuration manager  302 ; addition of the EC and/or its associated equipment may exceed a specified number of ECs and/or associated equipment permitted for a subsystem; operating conditions of the well construction system may prohibit addition of the EC and/or its associated equipment; failure by the EC to transmit an authorization certificate accepted by the configuration manager; and/or other example conditions. If the determination ( 608 ) is that the EC is not authorized, the method ( 600 ) includes sending ( 610 ) an alert from the configuration manager  302 . The alert can be to personnel devices to alert the personnel of an unauthorized device being connected to the operations network  300  and/or to one or more processing systems, such as one or more network appliances, to lock the EC out of the operations network  300 . Other actions can also or instead be taken in response to the EC not being authorized. 
     If the determination ( 608 ) is that the EC is authorized, the method ( 600 ) includes instantiating ( 612 ) an object for the EC by the configuration manager  302 . The object can correspond to a type of subsystem, control data, and/or sensor and/or status data with which the EC is associated, for example. The object can be in various forms, and can contain various information. Further, the object can be instantiated based on the protocol that the EC implements for communications. For example, translations of communications may differ depending on the protocol implemented between the configuration manager  302  and the EC. The configuration manager  302  may include predefined classes for instantiating various objects depending on the protocol used to communicate with the EC. With the object instantiated ( 612 ), the method ( 600 ) includes communicating ( 614 ) with the EC via the common data bus using the object to translate communications between the common data bus and the EC. For example, the EC can communicate sensor and/or status data to the common data bus using the object, which data can be consumed by, e.g., the coordinated controller  318 , process applications  320 , etc., and can receive commands from, e.g., the coordinated controller  318  through the common data bus using the object. 
     By dynamically detecting ECs and/or subsystems, various ECs and/or subsystems may be added to the well construction system more easily and transparent to job plan(s) and/or the coordinated controller. This may permit simpler deployment of the well construction system while being able to maintain robust communications and rich data throughout the network. 
     Other configurations of an operations network are also within the scope of the present disclosure. Different numbers of ECs, different numbers of subsystems and subsystem virtual networks, and different physical topologies and connections are also within the scope of the present disclosure. Additionally, other example implementations may include or omit an HMI and/or a historian, for example. 
     As an example subsystem, a drilling fluid circulation system can incorporate one or more ECs that control one or more controllable components. Controllable components in the drilling fluid circulation system may include one or more pumps (e.g., pump  142  in  FIGS. 1 and 2 ), a shale shaker (e.g., shale shaker  160 ), a desilter, a desander, a degasser (e.g., reconditioning equipment  162 ), a hopper, various valves that may be on pipes and/or lines, and other components. For example, a pump may be controllable by an EC to increase/decrease a pump rate by increasing/decreasing revolutions of a prime mover driving the pump, and/or to turn the pump on/off. Similarly, a shale shaker may be controllable by an EC to increase/decrease vibrations of a grating, and/or to turn on/off the shale shaker. A degasser may be controllable by an EC to increase/decrease a pressure in the degasser by increasing/decreasing revolutions of a prime mover of a vacuum pump of the degasser, and/or to turn on/off the degasser. A hopper may be controllable by an EC to open/close a valve of the hopper to control the release of an additive (e.g., caustic soda) into a pipe and/or line through which drilling fluid flows. Further, various relief valves, such as a relief discharge value on a discharge line of a drilling fluid pump, a relief suction valve on an intake or suction line of a drilling fluid pump, or the like, may be controllable by an EC to be opened/closed (such as to relieve pressure). The controllable components may be controlled by a digital signal and/or analog signal from an EC. A person of ordinary skill in the art will readily envisage other example controllable components in a drilling fluid circulation system and how such components would be controllable by an EC, which are also within the scope of the present disclosure. 
     The drilling fluid circulation system may also incorporate one or more ECs that receive one or more signals from one or more sensors that are indicative of conditions in the drilling fluid circulation system. The one or more ECs that control one or more controllable components may be the same as, different from, or a combination therebetween of the one or more ECs that receive signals from sensors. Example sensors may include various flow meters and/or pressure gauges that may be fluidly coupled to various lines and/or pipes through which drilling fluid flows, such as the discharge line of a drilling fluid pump, the standpipe, the return line, the intake line of the drilling fluid pump, around various equipment, and/or the like. Using flow meters and/or pressure gauges, flow rates and/or pressure differentials may be determined that can indicate a leak in equipment, that a clog in equipment has occurred, that the formation has kicked, that drilling fluid is being lost to the formation, or the like. Various tachometers can be on various pumps and/or prime movers to measure speed and/or revolutions, such as of a drilling fluid pump, a vacuum pump of a degasser, a motor of an agitator of a mud tank, or the like. The tachometers can be used to measure the health of the respective equipment. A pressure gauge can be on the degasser to measure a pressure within the degasser. The degasser may operate at a predetermined pressure level to adequately remove gas from drilling fluid, and a pressure reading from a pressure gauge can be fed back to control the pressure within the degasser. A pit volume totalizer can be in one or more mud tanks to determine an amount of drilling fluid held by the mud tanks, which can indicate a leak in equipment, that a clog in equipment has occurred, that the formation has kicked, that drilling fluid is being lost to the formation, or the like. A viscometer can be along the circulation to measure viscosity of the drilling fluid, which can be used to determine remedial action, such as adding an additive to the drilling fluid at a hopper. Signals from such sensors can be sent to and received by one or more ECs, which can then transmit the sensor data to the common data bus and/or use the data to responsively control controllable components, for example. The signals from the sensor that are received by an EC may be a digital signal and/or analog signal. A person of ordinary skill in the art will readily envisage other example sensors in a drilling fluid circulation system and how such components would be coupled to an EC, which are also within the scope of the present disclosure. 
     As another example, a rig control system may incorporate one or more ECs that control one or more controllable components. Controllable components of the hoisting equipment may include a prime mover of the drawworks, one or more brakes, and others. For example, a prime mover of the drawworks may be controllable by an EC to increase/decrease a revolution rate of the prime mover of the drawworks, and/or to turn the prime mover on/off. A mechanical (and/or electronic) brake may be controllable by an EC to actuate the brake (e.g., a caliper and pad assembly) to clamp/release a brake disk of the drawworks, for example. 
     Controllable components in the drillstring rotary mover equipment may include a prime mover (e.g., including the top drive  116  in  FIG. 1  and/or the rotary table depicted in  FIG. 2 ), a gearbox and/or transmission, a pipe handler assembly and/or grabber, a kelly spinner, a torque wrench, mechanized and/or automated slips, and/or others. For example, the prime mover may be controllable by an EC to increase/decrease a revolution rate of the prime mover, and/or to turn the prime mover on/off. The gearbox and/or transmission may be controllable by an EC to set and/or change a gear ratio between the prime mover and the drive shaft or master bushing. The pipe handler assembly and/or grabber can be controllable by an EC to move the pipe handler assembly and/or grabber for receiving, setting, clasping, and/or releasing a tubular. The kelly spinner can be controllable by an EC to rotate a kelly when making up or breaking out a connection between the kelly and the drillstring. The torque wrench can be controllable by an EC to clamp and twist a tubular to make up a connection between the drive shaft and the tubular. The mechanized and/or automated slips can be controllable by an EC to open/close the slips. 
     The controllable components may be controlled by a digital signal and/or analog signal from an EC. A person of ordinary skill in the art will readily envisage other example controllable components in a rig control system and how such components would be controllable by an EC, which are also within the scope of the present disclosure. 
     The rig control system may also incorporate one or more ECs that receive one or more signals from one or more sensors that are indicative of conditions in the rig control system. The one or more ECs that control one or more controllable components may be the same as, different from, or a combination therebetween of the one or more ECs that receive signals from sensors. As some examples of sensors, a crown saver can be in a drawworks to determine and indicate when an excessive amount of drilling line has been taken in by the drawworks. An excessive amount of drilling line being taken in can damage hoisting equipment, such as by a traveling block impacting a crown block, and the signal from the crown saver can be fed back to indicate when the drawworks should cease taking in drilling line. A WOB sensor can be included on the traveling block, drawworks, deadline, other components/lines, and/or combinations thereof. The signal from the WOB sensor can be fed back to determine if too much or too little weight is on the bit of the drillstring, and in response, to determine whether to take in or reel out, respectively, drilling line. Further, a tachometer can be on a prime mover of the drawworks to measure speed and/or revolutions. The tachometer can be used to measure the health of the prime mover. 
     As further examples of sensors, various tachometers can be on the prime mover and/or drive shaft or master bushing of drillstring rotary mover equipment, and can be used to determine a rate of rotation of the respective prime mover and/or drive shaft or master bushing. A torque-on-bit sensor can be in a BHA. Various pressure gauges can be coupled to hydraulic systems used for the pipe handler assembly and/or grabber, the torque wrench, the slips, and/or other components. 
     Signals from such sensors can be sent to and received by one or more ECs, which can then transmit the sensor data to the common data bus and/or use the data to responsively control controllable components, for example. The signals from the sensor that are received by an EC may be a digital signal and/or analog signal. A person of ordinary skill in the art will readily envisage other example sensors in a rig control system and how such components would be coupled to an EC, which are also within the scope of the present disclosure. 
     A person of ordinary skill in the art will readily understand other example subsystems that may be in a well construction system, and that such other subsystems are also within the scope of the present disclosure. Such other subsystems may include a managed pressure drilling system, a cementing system, and/or a rig walk system, among other examples. A person of ordinary skill in the art will readily understand example EC(s), controllable component(s), and/or sensor(s) that can be used in these additional example systems. Additionally, a person of ordinary skill in the art will readily understand other example equipment and components that may be included in or omitted from example subsystems described herein. 
       FIG. 7  is a schematic view of at least a portion of an example implementation of a first processing system  700  according to one or more aspects of the present disclosure. The first processing system  700  may execute example machine-readable instructions to implement at least a portion of the configuration manager, coordinated controller, virtual networks, HMI, and/or historian described herein. 
     The first processing system  700  may be or comprise, for example, one or more processors, controllers, special-purpose computing devices, industrial computers, servers, personal computers, internet appliances, PLCs, and/or other types of computing devices. Moreover, while it is possible that the entirety of the first processing system  700  shown in  FIG. 7  is implemented within one device, e.g., in the control center  198  of  FIGS. 1 and 2 , it is also contemplated that one or more components or functions of the first processing system  700  may be implemented across multiple devices, some or an entirety of which may be at the wellsite and/or remote from the wellsite of the well construction systems  100  and  250  of  FIGS. 1 and 2 , respectively. 
     The first processing system  700  comprises a processor  712  such as, for example, a general-purpose programmable processor. The processor  712  may comprise a local memory  714 , and may execute program code instructions  732  present in the local memory  714  and/or in another memory device. The processor  712  may execute, among other things, machine-readable instructions or programs to implement the configuration manager, coordinated controller, process applications, and/or virtual networks described herein, for example. The programs stored in the local memory  714  may include program instructions or computer program code that, when executed by an associated processor, permit, cause, and/or embody implementation of the configuration manager, the coordinated controller, the virtual networks, an HMI, the process applications, and/or the historian as described herein. The processor  712  may be, comprise, or be implemented by one or more processors of various types operable in the local application environment, and may include one or more general-purpose processors, special-purpose processors, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), processors based on a multi-core processor architecture, and/or other processors. Examples of the processor  712  may include one or more INTEL microprocessors, microcontrollers from the ARM and/or PICO families of microcontrollers, and/or embedded soft/hard processors in one or more FPGAs, among other examples. 
     The processor  712  may be in communication with a main memory  717 , such as via a bus  722  and/or other communication means. The main memory  717  may comprise a volatile memory  718  and a non-volatile memory  720 . The volatile memory  718  may be, comprise, or be implemented by a tangible, non-transitory storage medium, such as random access memory (RAM), static random access memory (SRAM), synchronous dynamic random access memory (SDRAM), dynamic random access memory (DRAM), RAMBUS dynamic random access memory (RDRAM), and/or other types of random access memory devices. The non-volatile memory  720  may be, comprise, or be implemented by a tangible, non-transitory storage medium, such as read-only memory (ROM), flash memory, and/or other types of memory devices. One or more memory controllers (not shown) may control access to the volatile memory  718  and/or the non-volatile memory  720 . 
     The first processing system  700  may also comprise an interface circuit  724  in communication with the processor  712 , such as via the bus  722 . The interface circuit  724  may be, comprise, or be implemented by various types of standard interfaces, such as an Ethernet interface, a universal serial bus (USB) interface, a third generation input/output (3GIO) interface, a wireless interface, a BLUETOOTH interface, and/or a cellular interface, among other examples. One or more ECs (e.g., EC  740  through EC  742  as depicted) are communicatively coupled to the interface circuit  724 , such as when the first processing system  700  is implemented as a network appliance, such as a switch, in the operations network. The interface circuit  724  may permit communications between the first processing system  700  and one or more ECs by one or more communication protocols, such as an Ethernet-based network protocol (such as ProfiNET, OPC, OPC/UA, Modbus TCP/IP, EtherCAT, UDP multicast, Siemens S7 communication, and/or others), a proprietary communication protocol, and/or another communication protocol. The interface circuit  724  may also comprise a communication device such as a modem or network interface card to facilitate exchange of data with external computing devices via a network, such as via Ethernet connection, digital subscriber line (DSL), telephone line, coaxial cable, cellular telephone system, and/or satellite, among other examples. 
     One or more input devices  726  may be connected to the interface circuit  724  and permit a user to enter data and/or commands for utilization by the processor  712 . Each input device  726  may be, comprise, or be implemented by one or more instances of a keyboard, a mouse, a touchscreen, a joystick, a control switch or toggle, a button, a track-pad, a trackball, an image/code scanner, and/or a voice recognition system, among other examples. 
     One or more output devices  728  may also be connected to the interface circuit  724 . The output device  728  may be, comprise, or be implemented by a display device, such as an LCD, an LED display, and/or a CRT display, among other examples. The interface circuit  724  may also comprise a graphics driver card to permit use of a display device as one or more of the output devices  728 . One or more of the output devices  728  may also or instead be, comprise, or be implemented by one or more instances of an LED, a printer, a speaker, and/or other examples. 
     The one or more input devices  726  and the one or more output devices  728  connected to the interface circuit  724  may, at least in part, enable the HMI described above with respect to  FIG. 3 . The input device(s)  726  may permit entry of commands to the coordinated controller, and the output device(s)  728  may permit visualization or other sensory perception of various data, such as sensor data, status data, and/or other example data. 
     The first processing system  700  may also comprise a mass storage device  730  for storing machine-readable instructions and data. The mass storage device  730  may be connected to the processor  712 , such as via the bus  722 . The mass storage device  730  may be or comprise a tangible, non-transitory storage medium, such as a floppy disk drive, a hard disk drive, a compact disk (CD) drive, and/or digital versatile disk (DVD) drive, among other examples. The program code instructions  732  may be stored in the mass storage device  730 , the volatile memory  718 , the non-volatile memory  720 , the local memory  714 , a removable storage medium (such as a CD, a DVD, and/or another external storage medium  734  connected to the interface circuit  724 ), and/or another storage medium. 
     The modules and/or other components of the first processing system  700  may be implemented in accordance with hardware (such as in one or more integrated circuit chips, such as an ASIC), or may be implemented as software or firmware for execution by a processor. In the case of software or firmware, the implementation can be provided as a computer program product including a computer readable medium or storage structure containing computer program code (i.e., software or firmware) for execution by the processor. 
       FIG. 8  is a schematic view of at least a portion of an example implementation of a second processing system  800  according to one or more aspects of the present disclosure. The second processing system  800  may execute example machine-readable instructions to implement at least a portion of an EC as described herein. 
     The second processing system  800  may be or comprise, for example, one or more processors, controllers, special-purpose computing devices, servers, personal computers, internet appliances, and/or other types of computing devices. Moreover, while it is possible that the entirety of the second processing system  800  shown in  FIG. 8  is implemented within one device, it is also contemplated that one or more components or functions of the second processing system  800  may be implemented across multiple devices, some or an entirety of which may be at the wellsite and/or remote from the wellsite of the well construction systems  100  and  250  of  FIGS. 1 and 2 , respectively. 
     The second processing system  800  comprises a processor  810  such as, for example, a general-purpose programmable processor. The processor  810  may comprise a local memory  812 , and may execute program code instructions  840  present in the local memory  812  and/or in another memory device. The processor  810  may execute, among other things, machine-readable instructions or programs to implement logic for monitoring and/or controlling one or more components of a well construction system. The programs stored in the local memory  812  may include program instructions or computer program code that, when executed by an associated processor, enable monitoring and/or controlling one or more components of a well construction system. The processor  810  may be, comprise, or be implemented by one or more processors of various types operable in the local application environment, and may include one or more general-purpose processors, special-purpose processors, microprocessors, DSPs, FPGAs, ASICs, processors based on a multi-core processor architecture, and/or other processors. 
     The processor  810  may be in communication with a main memory  814 , such as via a bus  822  and/or other communication means. The main memory  814  may comprise a volatile memory  816  and a non-volatile memory  818 . The volatile memory  816  may be, comprise, or be implemented by a tangible, non-transitory storage medium, such as RAM, SRAM, SDRAM, DRAM, RDRAM, and/or other types of random access memory devices. The non-volatile memory  818  may be, comprise, or be implemented by a tangible, non-transitory storage medium, such as ROM, flash memory, and/or other types of memory devices. One or more memory controllers (not shown) may control access to the volatile memory  816  and/or the non-volatile memory  818 . 
     The second processing system  800  may also comprise an interface circuit  824  in communication with the processor  810 , such as via the bus  822 . The interface circuit  824  may be, comprise, or be implemented by various types of standard interfaces, such as an Ethernet interface, a USB interface, a peripheral component interconnect (PCI) interface, and a 3GIO interface, among other examples. One or more other processing system  850  (e.g., the first processing system  700  of  FIG. 7 ) are communicatively coupled to the interface circuit  824 . The interface circuit  824  can enable communications between the second processing system  800  and one or more other processing system (e.g., a network appliance, the processing system of the configuration manager  302 , or another processing system in  FIG. 3 ) by enabling one or more communication protocols, such as an Ethernet-based network protocol (such as ProfiNET, OPC, OPC/UA, Modbus TCP/IP, EtherCAT, UDP multicast, Siemens S7 communication, and/or others), a proprietary communication protocol, and/or another communication protocol. 
     One or more input devices  826  may be connected to the interface circuit  824  and permit a user to enter data and/or commands for utilization by the processor  810 . Each input device  826  may be, comprise, or be implemented by one or more instances of a keyboard, a mouse, a touchscreen, a joystick, a control switch or toggle, a button, a track-pad, a trackball, an image/code scanner, and/or a voice recognition system, among other examples. 
     One or more output devices  828  may also be connected to the interface circuit  824 . The output device  828  may be, comprise, or be implemented by a display device, such as an LCD and/or an LED display, among other examples. The interface circuit  824  may also comprise a graphics driver card to enable use of a display device as one or more of the output devices  828 . One or more of the output devices  828  may also or instead be, comprise, or be implemented by one or more instances of an LED, a printer, a speaker, and/or other examples. 
     The second processing system  800  may comprise a shared memory  830  in communication with the processor  810 , such as via the bus  822 . The shared memory  830  may be, comprise, or be implemented by a tangible, non-transitory storage medium, such as RAM, SRAM, SDRAM, DRAM, RDRAM, and/or other types of random access memory devices. 
     The second processing system  800  may comprise one or more analog input (AI) interface circuits  832 , one or more digital input (DI) interface circuits  834 , one or more analog output (AO) interface circuits  836 , and/or one or more digital output (DO) interface circuits  838 , each of which may be in communication with the shared memory  830 . The AI interface circuit  832  may include one or multiple inputs, and may convert an analog signal received on an input into digital data useable by the processor  810 , for example. The DI interface circuit  834  may include one or multiple inputs, and may receive a discrete signal (e.g., on/off signal), which may be useable by the processor  810 . The AI interface circuit  832  and the DI interface circuit  834  are communicatively coupled to the shared memory  830 , where the AI interface circuit  832  and DI interface circuit  834  can cache and/or queue input data and from which the processor  810  can access the data. The inputs of the AI interface circuit  832  and the DI interface circuit  834  are communicatively coupled to outputs of various sensors (e.g., analog output sensor  852  and digital output sensor  854 ), devices, components, etc., in a well construction system. The AI interface circuit  832  and the DI interface circuit  834  can be used to receive, interpret, and/or reformat sensor data and monitor the status of one or more components, such as by receiving analog signals and discrete signals, respectively, of the various sensors, devices, components, etc., in the well construction system. 
     The AO interface circuit  836  may include one or multiple outputs to output analog signals, which may be converted from digital data provided by the processor  810  and temporarily stored in the shared memory  830 , for example. The DO interface circuit  838  may include one or multiple outputs, and can output a discrete signal (e.g., on/off signal), which may be provided by the processor  810  and temporarily stored in the shared memory  830 , for example. The AO interface circuit  836  and the DO interface circuit  838  are communicatively coupled to the shared memory  830 . The outputs of the AO interface circuit  836  and the DO interface circuit  838  are communicatively coupled to inputs of various devices, components, etc., such as one or more analog input controllable components  856  and/or one or more digital input controllable components  858 , in a well construction system. The AO interface circuit  836  and the DO interface circuit  838  can be used to control the operation of one or more components, such as by providing analog signals and discrete signals, respectively, to the various devices, components, etc., in the well construction system. 
     The second processing system  800  may also comprise a mass storage device  839  for storing machine-readable instructions and data. The mass storage device  839  may be connected to the processor  810 , such as via the bus  822 . The mass storage device  839  may be or comprise a tangible, non-transitory storage medium, such as a floppy disk drive, a hard disk drive, a CD drive, and/or DVD drive, among other examples. The program code instructions  840  may be stored in the mass storage device  839 , the volatile memory  816 , the non-volatile memory  818 , the local memory  812 , a removable storage medium, such as a CD or DVD, and/or another storage medium. 
     The modules and/or other components of the second processing system  800  may be implemented in accordance with hardware (such as in one or more integrated circuit chips, such as an ASIC), or may be implemented as software or firmware for execution by a processor. In the case of software or firmware, the implementation can be provided as a computer program product including a computer readable medium or storage structure containing computer program code (i.e., software or firmware) for execution by the processor. 
     In view of the entirety of the present disclosure, including the figures and the claims, a person having ordinary skill in the art will readily recognize that the present disclosure introduces an apparatus comprising a processing system comprising a processor and a memory including computer program code, wherein the processing system is operable to implement an arbiter, and wherein the arbiter is operable to: (A) receive commands from one or more non-prioritized actors and one or more prioritized actors; (B) repeatedly, issue an earliest received, non-issued command received from the one or more non-prioritized actors, wherein execution of an immediately preceding issued command is completed or is terminated by a sending actor of the immediately preceding issued command before a subsequent earliest received, non-issued command is issued; and (C) issue a command received from one of the one or more prioritized actors upon receipt of the command received from one of the one or more prioritized actors, wherein issuance of the command received from the one of the one or more prioritized actor is operable to interrupt issuance and execution of a command received from the one or more non-prioritized actors. The commands from the one or more non-prioritized actors and the one or more prioritized actors are issued to one or more equipment controllers operable to control equipment of a well construction system. 
     The one or more non-prioritized actors may include one or more job plans. 
     One of the non-prioritized actors may include a first job plan, and one of the prioritized actors may include a second job plan. 
     The one or more prioritized actors may include one or more HMIs. 
     The arbiter may be operable to cancel, before or at completion of execution of the command received from the one of the one or more prioritized actors, commands received before issuance of the command received from the one of the one or more prioritized actors. 
     The arbiter may be operable to return, at completion of execution of the command received from the one of the one or more prioritized actors, to the issuance and execution of the command received from the one or more non-prioritized actors at which the issuance of the command received from the one of the one or more prioritized actors interrupted. 
     The processing system may be operable to: receive one or more job plans from one or more process applications operating on one or more other processing system; generate commands based on the one or more job plans; and communicate the commands based on the one or more job plans to the arbiter, wherein the commands based on the one or more job plans may be commands from one or more non-prioritized actors. The processing system may be further operable to: receive one or more updated job plans from the one or more process applications operating on the one or more other processing system, wherein the one or more updated job plans may be based on execution of the command received from the one of the one or more prioritized actors; cancel commands communicated to the arbiter before the execution of the command received from the one of the one or more prioritized actors; generate commands based on the one or more updated job plans; and communicate the commands based on the one or more updated job plans to the arbiter. 
     The equipment of the well construction system may be selected from the group consisting of equipment of a drilling rig control system, equipment of a drilling fluid circulation system, equipment of a managed pressure drilling system, equipment of a cementing system, and equipment of a rig walk system. 
     The present disclosure also introduces an apparatus comprising: (A) a network of a well construction system; (B) a first processing system communicatively coupled to the network and comprising a processor and a memory including computer program code, wherein the first processing system is operable to: (i) generate one or more job plans based on conditions of the well construction system; and (ii) transmit the one or more job plans through the network; (C) a second processing system communicatively coupled to the network and comprising a processor and a memory including computer program code, wherein the first processing system is operable to implement an HMI, wherein the HMI is operable to transmit through the network an HMI command based on user input into the HMI; and (D) a third processing system communicatively coupled to the network and comprising a processor and a memory including computer program code. The first processing system is operable to: (A) receive the one or more job plans; (B) generate job commands based on the one or more job plans; and (C) implement an arbiter operable to: (i) receive the job commands and the HMI command; (ii) repeatedly, issue an earliest received, non-issued one of the job commands, wherein execution of an immediately preceding issued job command is completed or is terminated by the third processing system based on the one or more job plans before a subsequent earliest received, non-issued one of the job commands is issued; and (iii) issue the HMI command upon receipt of the HMI command, wherein issuance of the HMI command is operable to interrupt issuance and execution of the job commands. The job commands and the HMI command are issued to one or more equipment controllers operable to control equipment of the well construction system. 
     The arbiter may be operable to cancel, before or at completion of execution of the HMI command, job commands received before issuance of the HMI command. 
     The arbiter may be operable to return, at completion of execution of the HMI command, to the issuance and execution of the job commands at which the issuance of the HMI command interrupted. 
     The first processing system may be operable to update the one or more job plans based on the execution of the HMI command, and to transmit the one or more updated job plans through the network, and the third processing system may be operable to receive the one or more updated job plans, cancel job commands communicated to the arbiter before the execution of the HMI command, and generate job commands based on the one or more updated job plans. 
     The equipment of the well construction system may be selected from the group consisting of equipment of a drilling rig control system, equipment of a drilling fluid circulation system, equipment of a managed pressure drilling system, equipment of a cementing system, and equipment of a rig walk system. 
     The present disclosure also introduces a method comprising operating a processing system comprising a processor and a memory including computer program code, wherein operating the processing system comprises operating an arbiter, and wherein operating the arbiter comprises: (A) receiving commands from one or more non-prioritized actors and one or more prioritized actors; (B) repeatedly issuing an earliest received, non-issued command received from the one or more non-prioritized actors, wherein execution of an immediately preceding issued command is completed or is terminated by a sending actor of the immediately preceding issued command before a subsequent earliest received, non-issued command is issued; and (C) issuing a command received from one of the one or more prioritized actors upon receipt of the command received from one of the one or more prioritized actors, wherein issuance of the command received from the one of the one or more prioritized actor is operable to interrupt issuance and execution of a command received from the one or more non-prioritized actors. The commands from the one or more non-prioritized actors and the one or more prioritized actors are issued to one or more equipment controllers operable to control equipment of a well construction system. 
     The one or more non-prioritized actors may include one or more job plans. 
     The one or more prioritized actors may include one or more HMIs. 
     Operating the arbiter may comprise cancelling, before or at completion of execution of the command received from the one of the one or more prioritized actors, commands received before issuance of the command received from the one of the one or more prioritized actors. 
     Operating the arbiter may comprise returning, at completion of execution of the command received from the one of the one or more prioritized actors, to the issuance and execution of the command received from the one or more non-prioritized actors at which the issuance of the command received from the one of the one or more prioritized actors interrupted. 
     Operating the processing system may comprise: receiving one or more job plans from one or more process applications operating on one or more other processing system; generating commands based on the one or more job plans; and communicating the commands based on the one or more job plans to the arbiter, wherein the commands based on the one or more job plans may be commands from one or more non-prioritized actors. Operating the processing system may further comprise: receiving one or more updated job plans from the one or more process applications operating on the one or more other processing system, wherein the one or more updated job plans may be based on execution of the command received from the one of the one or more prioritized actors; cancelling commands communicated to the arbiter before the execution of the command received from the one of the one or more prioritized actors; generating commands based on the one or more updated job plans; and communicating the commands based on the one or more updated job plans to the arbiter. 
     The equipment of the well construction system may be selected from the group consisting of equipment of a drilling rig control system, equipment of a drilling fluid circulation system, equipment of a managed pressure drilling system, equipment of a cementing system, and equipment of a rig walk system. 
     The present disclosure also introduces a method comprising: (A) operating a first processing system communicatively coupled to a network and comprising a processor and a memory including computer program code, wherein operating the first processing system comprises: (i) executing one or more job plans based on conditions of a well construction system; and (ii) transmitting the one or more job plans through the network; (B) operating a second processing system communicatively coupled to the network and comprising a processor and a memory including computer program code, wherein operating the first processing system comprises operating an HMI, and wherein operating the HMI comprises transmitting through the network an HMI command based on user input into the HMI; and (C) operating a third processing system communicatively coupled to the network and comprising a processor and a memory including computer program code, wherein operating the first processing system comprises: (i) receiving the one or more job plans; (ii) generating job commands based on the one or more job plans; and (iii) operating an arbiter comprising: (a) receiving the job commands and the HMI command; (b) repeatedly issuing an earliest received, non-issued one of the job commands, wherein execution of an immediately preceding issued job command is completed or is terminated by the third processing system based on the one or more job plans before a subsequent earliest received, non-issued one of the job commands is issued; and (c) issuing the HMI command upon receipt of the HMI command, wherein issuance of the HMI command is operable to interrupt issuance and execution of the job commands. The job commands and the HMI command are issued to one or more equipment controllers operable to control equipment of the well construction system. 
     Operating the arbiter may comprise cancelling, before or at completion of execution of the HMI command, job commands received before issuance of the HMI command. 
     Operating the arbiter may comprise returning, at completion of execution of the HMI command, to the issuance and execution of the job commands at which the issuance of the HMI command interrupted. 
     Operating the first processing system may comprise updating the one or more job plans based on the execution of the HMI command, and transmitting the one or more updated job plans through the network, and operating the third processing system may comprise receiving the one or more updated job plans, cancelling job commands communicated to the arbiter before the execution of the HMI command, and generating job commands based on the one or more updated job plans. 
     The equipment of the well construction system may be selected from the group consisting of equipment of a drilling rig control system, equipment of a drilling fluid circulation system, equipment of a managed pressure drilling system, equipment of a cementing system, and equipment of a rig walk system. 
     The foregoing outlines features of several embodiments so that a person having ordinary skill in the art may better understand the aspects of the present disclosure. A person having ordinary skill in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same functions and/or achieving the same benefits of the embodiments introduced herein. A person having ordinary skill in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure. 
     The Abstract at the end of this disclosure is provided to permit the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.