Patent Publication Number: US-11639638-B2

Title: Combination tubular handler and power swivel unit

Description:
BACKGROUND 
     Field of the Disclosure 
     This disclosure generally relates to machines, tools, systems, and the like used in the oil and gas industry for combining the functions of a pipe handler and a power swivel. More specifically, the disclosure relates to a single unit for moving individual tubulars and separately moving a power swivel and various other items or equipment to or from a rig floor. 
     Background of the Disclosure 
     When drilling for oil or gas, a wellbore is typically drilled using a drill bit attached to the lower end of a “drill string.” The process of drilling a well typically includes a series of drilling, tripping, casing and cementing, and repeating as necessary. The process of doing well servicing on a previously drilled, completed, and producing well uses many of the same operations although rotation is only required for operations such as milling out a packer and/or sometimes for drilling the well deeper.  FIG.  1    shows a simplified view of a conventional drilling operation  100 . A derrick  102  (or drilling rig) is configured to rotate a drill string  104  that has a drill bit  106  disposed at a lower end of the drill string  104 , typically using a power swivel/top drive  110  and associated equipment. The power swivel/top drive  110  rotates the string  104  and the drill bit  106  to do drilling or milling work downhole in the wellbore  108   
     Near the derrick  102 , a plurality of tubular members  103   a  are often stored on a pipe rack(s)  112 . The pipe rack  112  is relatively near the ground, and substantially below the rig floor  115 . Therefore, tubulars  103 ,  103   a  must be transported to the rig floor  115  joint by joint for use in drilling or servicing operations. 
     Pipe handling systems are utilized to transport the tubular  103  from the pipe rack  112  and present the tubular  103  to rig floor  115  for use by rig floor personnel. Such pipe handling systems are commonly available from rental companies, well servicing or drilling companies, and the like. These systems are typically known as pipe handlers or hydraulic catwalks. 
     Before such handling equipment, handling of tubulars  103   a  has long been a problem when moving a tubular from a horizontal position on the catwalk  113 , up an inclined ramp or V-door  114 , to the rig floor in the derrick  102  where rig floor personnel can latch on with an elevator and raise the pipe to a vertical position. Additional men along with crude and dangerous handling procedures such as cables and winching have been required to move the tubular  103  to the angular position at the rig floor for use by rig floor personnel. Accidents and injuries have been commonplace. 
     Currently, many variations of pipe handling systems exist which are much safer. However, no system exists which combines the functions of a power swivel with a pipe handler. Currently, separate pipe handling and power swivel systems must be bought or rented, requiring two hauls to the rig site and taking up two equipment spaces at the rig site. The use of separate pipe handler and power swivel means twice as many service companies, twice as much equipment, twice as many people, twice as much space used, and inefficient use of rig time. 
     No mobile single system currently exists which may allow for coordinating the movement of a tubular to an angular presentation at a rig floor, threadably engaging the tubular at an adjustable angle with a power swivel, and for lifting the tubular to a vertical position, then rotating into the preceding joint of pipe. 
     Similarly, if company policy does not allow power swivel rotation into the pipe connection, this machine may be equipped with a pipe push and rotate function, which allows threadable engagement with the power swivel without power swivel rotation. 
     Additionally, an unsafe condition exists for moving a power swivel to a rig floor from its transport trailer. This work has been done typically by using two men and two winch lines with the power swivel in between, an obviously unsafe and dangerous condition. This combination machine easily and safely moves the power swivel from its transport position to the rig floor using the pipe handler controls and without men using winch lines. 
     Additionally, a need exists to store the power swivel out of the way when it is not in use. This is done with a remote-controlled hydraulic swivel rack which moves the power swivel to an out of the way position where it remains safely on its rack. 
     Additionally, this movable hydraulic storage rack is designed so that the power swivel always rests in the hydraulic storage rack in one of two positions when not in use on the rig. That is, in its transport position and in its storage position. When in road transport position, the arrangement allows the pipe handler to lift the power swivel up and out of the rack for easy and safe transport to the rig floor. 
     Additionally, a need exists for safely transporting unrelated items and equipment from the ground to the rig floor. The trough of this unit may be arranged with hooks, shackles, chain, basket, mounts, etc to allow the safe temporary attachment of such items for transport to or from the rig floor. This eliminates men carrying items up stairs and eliminates men using winches and cables. This usage also moves such items to an open space on the rig floor with out handrails in the way. 
     A need exists, therefore, for a combination tubular handling system and a power swivel to provide a rig site space saving solution, a rapid and safe pipe handling solution, a rapid and safe solution to transport the power swivel to and from the rig floor, a rapid and safe solution to transport various unrelated items and equipment to and from the rig floor, a power swivel tilt function allowing tilting the power swivel to a preset angle matching the pipe angle for rapid and safe spinup of the threaded connection against a soft low torque backup, and an alternate pipe rotation solution if power swivel rotation is not allowed. 
     The ability to increase efficiency and save operational time and expense while increasing safety leads to considerable competition in the marketplace. Achieving any ability to save time, or ultimately cost, while increasing safety leads to an immediate competitive advantage. Thus, there is a need in the art for a pipe handling system that saves time and increases safety. 
     SUMMARY 
     Embodiments of the present disclosure pertain to a combination tubular and power swivel handler, and may sometimes be referred to simply as a ‘combination unit’ or ‘unit’. The equipment of the combination unit may be mounted on a trailer or other form of support frame, skid, chassis, etc. 
     Embodiments of the disclosure pertain to a combination tubular handler and power swivel unit coupled with a trailer; and a power swivel movingly disposed on the trailer. The tubular handler may have one or more of: a trough assembly; a raising leg movingly coupled with the trough assembly; and a following leg coupled with an end of the trough assembly. 
     The unit may have a transport mechanism configured to facilitate transfer of a tubular to the trough assembly. The transport mechanism may include one or more movable arms extending from the unit, to pick up or deliver a tubular from a pipe rack. The transport mechanism may have a pipe kicker(s) in association therewith which may be disposed in the trough assembly. 
     The unit may have a hose reel comprising a set of one or more hoses; an engine, and a pump(s) disposed on the trailer. One or more of the hoses may be in fluid communication with the pumps and the power swivel. The trough assembly may be configured to lift the power swivel off the swivel rack of the trailer for separate delivery of both the power swivel and at least one tubular to a height. In aspects, the height may be in a height range between and including 4 feet to 100 feet. 
     The main lifting arm may include a trough housing with a first slider coupled with a first housing side of the trough housing, and a second slider coupled with a second housing side of the trough housing. The raising leg may have a first leg guide rail movingly engaged with the first slider. The raising leg may have a second leg guide rail movingly engaged with the second slider. The raising leg may have an at least one row of selector holes proximately disposed in either of the first leg guide rail or the second leg guide rail. 
     The support frame may have a power swivel support rack configured to move from a raised transport position to a lowered storage position. The combination unit may have an at least one operator station operably configured to control an at least one of the tubular handler, the power swivel, and combinations thereof. 
     The raising leg may be configured to move in a raising leg angle range between and including 0 degrees to 175 degrees. The trough assembly may include a skate configured with a platform for resting an end of a tubular thereon. A portion of the skate (or the platform) may be configured to push and rotate the tubular as it sits in the trough assembly. In aspects, the trough assembly may be configured to grip and/or rotate the tubular. 
     Embodiments of the unit may be provided to push and rotate the tubular as it sits in the trough assembly. 
     The unit may include an at least one fluid source or reservoir disposed on the support frame and in fluid communication with each of the pump and the power swivel. 
     Other embodiments of the disclosure pertain to a drilling system that may include a derrick, mast, or other comparable structure. The derrick may have a rig floor elevated to a height from ground level. The height may be between and including 5 feet and 100 feet. 
     There may be a tubular source proximate to the derrick, and comprising an at least one tubular. The source may be a pipe rack having the at least one tubular thereon. 
     The system may include a combination unit having a trailer or support frame; a power swivel movingly disposed on the trailer; and a tubular handler coupled with the trailer. The tubular handler may include a trough assembly; and a raising leg movingly coupled with the trough assembly. The tubular handler may have a following leg pivotably coupled with an end of the trough assembly. 
     The combination unit may include a transport mechanism configured to facilitate transfer of the at least one tubular to the trough assembly from the tubular source. The unit may have a hose reel comprising a plurality of hoses. There may be an engine and pumps disposed on the trailer or support frame. 
     The trough assembly may be configured to lift the power swivel off the swivel support rack of the trailer or support frame for delivery of the power swivel to the rig floor. 
     The trough assembly may include a main lifting arm having a first end configured for a trough to extend therefrom. The tubular may lay or otherwise be disposed within the trough. The end of the lifting arm assembly may include a second end of the trough. 
     The trough assembly may include a trough housing with a first slider coupled with a first housing side of the trough housing. The main trough may include a second slider coupled with a second housing side of the trough housing. The raising leg may include a first leg guide rail movingly engaged with the first slider. The raising leg may include a second leg guide rail movingly engaged with the second slider. 
     The support frame may include a powered support rack for a power swivel configured to move from a lowered position to a raised position, and from the raised position to the lowered position. The trailer or support frame may include a gooseneck trailer hitch. The engine and pump(s) may be disposed on the gooseneck. 
     The unit may include an at least one fluid source disposed on the support frame and in fluid communication with each of the pump and the power swivel. In aspects, the hose reel may be disposed on the support frame and underneath the first end of the trough assembly (e.g., when the trough assembly is in its lowered position). 
     Embodiments of the present disclosure pertain to a combination tubular and power swivel handler, and may sometimes be referred to simply as a ‘combination unit’ or ‘unit’. The equipment of the combination unit may be mounted on a platform (or other form of support frame, chassis, etc.), which may be in the form of a trailer or a skid. 
     The tubular may be a pipe, and the power swivel may be any form of driver or power rotation device. In an alternative to handling the power swivel, the combination unit may be used to handle other components, such as tools or other pieces of equipment. 
     The support frame may be in the form of a trailer or a skid. The support frame may be configured to be towed by a vehicle, and may have wheels, outriggers, and a towing hitch. The outriggers may be configured to be retracted or extended as necessary. When the support frame is positioned as desired, the outriggers may be extended to secure the unit in a level and substantially fixed position. 
     The combination unit may have or include a power swivel, a transfer mechanism, a tubular handler, and an operator station(s) for controlling one or more of the tubular handler, the power swivel, and the transfer mechanism. In embodiments, the power swivel may have a tilt function or mechanism with adjustable maximum and minimum tilt positions. 
     The combination unit may thus have the tubular handler and the power swivel together on a single trailer or support frame, and thereby may only require or utilize a single footprint near the rig (saving valuable space). 
     Automation of repetitive tasks with this handler may provide rapid and safe presentation of tubulars to the rig floor which minimizes the need for personnel to have “hands on” equipment or tubulars, thus increasing the safety of operations. Further, the flexibility of being able to use either the tubular handler or the power swivel, or both together, may improve equipment utilization rates, improve safety, and save time, and therefore reduce overall cost, and increase profitability for users (such as rental or service companies). 
     The power swivel may be movingly disposed on a power swivel support rack. The power swivel support rack may be configured to have the power swivel thereon during travel to a rig site. 
     In embodiments, the power swivel may be in fluid communication (directly or indirectly) with a hose reel and a pump(s) for fluid supply. The hose reel may have a plurality of hoses in fluid communication with a hydraulic pump(s). The plurality of hoses may include two main power hoses, one case drain hose, and one pressure hose (for the tilt cylinder). The plurality of hoses may be extended and retracted (unrolled and rolled up) from the hose reel. The tilt cylinder, like any double acting hydraulic cylinder, may utilize two hoses for powering to extend and retract. Alternatively there may be circuit that uses a hose or tube onboard the power swivel in communication with a low pressure hydraulic fluid source configured to tilt the power swivel back to vertical. 
     There may be a power swivel control panel for remotely controlling the power swivel (including the tilt function) from the unit. In embodiments, the power swivel control panel may be relocated to the rig floor where the rig operator may conveniently and safely control the power swivel. 
     Tubular handling functions provided via the combination unit may include one or more of the following, but are not limited to the following: a transfer mechanism may be provided to transfer the tubular to and from a tubular source, such as a pipe rack; tubular loading arms may be arranged to support transfer of the tubular on a slight grade toward or away from a trough assembly; an indexing mechanism may be arranged to index one tubular at a time into the pipe handler trough while holding back the other joints; a trough assembly may be configured to raise and lower a tubular to a desired position; a skate may be powered (e.g., hydraulically) to push a tubular or a joint of pipe up the trough to a convenient extension for use by rig floor personnel, where the tubular may be threadably engaged by the power swivel. 
     Alternatively the pipe may be rotatable by the skate and/or trough assembly to threadably engage the non-rotating power swivel. 
     Still other embodiments pertain to a combination tubular handler and power swivel unit that may include any of: a support frame; a power swivel movingly disposed on the support frame; a tubular handler coupled with the support frame; and a transport mechanism configured to facilitate transfer of an at least one tubular to the trough assembly. 
     The tubular handler may include a trough assembly. The trough assembly may include a main trough having a first end configured for a secondary trough to extend therefrom; and a skate configured with a platform for resting an end of a tubular thereon. 
     There may be a raising leg movingly coupled with the trough assembly, the raising leg configured with a first guide rail. There may be a following leg pivotably coupled with an end of the trough assembly. There may be a transport mechanism configured to facilitate transfer of an at least one tubular to the trough assembly. 
     The trough assembly may be configured to lift the power swivel for delivery of the power swivel a height. An underside of the main trough may be configured with a trough housing. 
     Embodiments herein pertain to a method of using a combination tubular and power swivel handling unit. The method may include one or more steps discussed herein, and need not be in any specific order. The method may include the step of providing a combination unit proximate a drilling or service rig. The combination unit may be any of the embodiments described herein or as otherwise claimed. The combination unit may be towed to a rig site with a vehicle, and may be positioned as desired near a source of tubulars. 
     The method may include the step of securing the combination unit to be substantially level and stationary with a plurality of outriggers. Outriggers may be configured to be extended or retracted as needed by various known means. The method may include the step of raising the power swivel for engagement by an elevator suspended from a traveling block of the rig. In aspects, the method may include using the combination unit to raise the power swivel unit to the drilling rig floor for attachment to the traveling block. 
     There may be cabling, hoses, and the like on the combination unit and attached to the power swivel. There may be a drawworks, cable, elevator, and traveling block on the rig, which may also be attached to the power swivel. In aspects, the power swivel may be attached to the end of the tubular handler and transported thereby to the rig floor for attachment to the elevator and traveling block. 
     The method may include the step of transferring the tubular via the transfer mechanism to the tubular handler. In embodiments, the transfer mechanism may include a plurality of powered arms, which may be positional to have a slight grade toward or away from the tubular handler (to facilitate movement of tubulars via gravity). The combination unit may include a kicker or indexing mechanism. The tubular handler may include a trough assembly configured to receive the tubular. 
     The method may include the step of presenting the tubular to the rig floor using the tubular handler. The tubular handler may be operable to raise the trough assembly and push the tubular therefrom until the tubular is presented at a desired angle, a desired height, and a desired extension at the rig floor. The tubular handler may be operable to receive the tubular or the power swivel from the rig floor, and lower the trough assembly to a level position. 
     The method may include the step of threadably engaging the tubular with the power swivel (e.g., upon delivery to the rig floor). Upon presentation of the tubular, the power swivel may be used to threadably engage the tubular and lift it safely and rapidly to a vertical position, ready for drilling. 
     Alternatively, the method may include the trough having the ability to rotate the pipe onto the thread of the tilted non-rotating power swivel. 
     These and other embodiments, features and advantages will be apparent in the following detailed description and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A full understanding of embodiments disclosed herein is obtained from the detailed description of the disclosure presented herein below, and the accompanying drawings, which are given by way of illustration only and are not intended to be limitative of the present embodiments, and wherein: 
         FIG.  1    is a side view of a process diagram of a conventional drilling operation for an oil and gas production system; 
         FIG.  2 A  shows a top view of a combination hydraulic catwalk and power swivel according to embodiments of the disclosure; 
         FIG.  2 B  shows a side view of the combination hydraulic catwalk and power swivel according to embodiments of the disclosure; 
         FIG.  2 C  shows a side view of the combination hydraulic catwalk and power swivel with the hydraulic catwalk partially raised according to embodiments of the disclosure; 
         FIG.  2 D  shows a side view of the combination hydraulic catwalk and power swivel with the hydraulic catwalk presenting a tubular to a platform according to embodiments of the disclosure; 
         FIG.  3 A  shows a side view of the power swivel tilted away from a substantially vertical position according to embodiments of the disclosure; 
         FIG.  3 B  shows a side cross-sectional view of a tilt cylinder assembly according to embodiments of the disclosure; 
         FIG.  4 A  shows a side view of a hydraulic hose reel assembly according to embodiments of the disclosure; 
         FIG.  4 B  shows a rotated view of the hydraulic hose reel assembly according to embodiments of the disclosure; 
         FIG.  5 A  shows an isometric front view of a working operation system using having a combination handling unit in a first position according to embodiments of the disclosure; 
         FIG.  5 B  shows an isometric front view of the combination handling unit of  FIG.  5 A  in an intermediate position according to embodiments of the disclosure; 
         FIG.  5 C  shows an isometric front view of the combination handling unit of  FIG.  5 A  having another intermediate position with an extended telescoping trough according to embodiments of the disclosure; 
         FIG.  5 D  shows an isometric front side view of the combination handling unit of  FIG.  5 A  in a delivery position where a tubular and a power swivel are presented to a rig floor according to embodiments of the disclosure; 
         FIG.  5 E  shows an isometric view of the combination handling and transport unit of  FIG.  5 A  in a delivery position where a power swivel is engaged with a tubular on the unit according to embodiments of the disclosure; 
         FIG.  6 A  shows a close-up isometric view of a power swivel disposed on a support rack of a combination handling unit according to embodiments of the disclosure; 
         FIG.  6 B  shows close-up isometric view of the support rack moved to a raised position according to embodiments of the disclosure; 
         FIG.  6 C  shows a close-up side view of the power swivel lifted off the support rack according to embodiments of the disclosure; 
         FIG.  7 A  shows an underside view of a trough assembly coupled with a raising leg according to embodiments of the disclosure; and 
         FIG.  7 B  shows underside view of the trough assembly of  FIG.  7 A  according to embodiments of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Regardless of whether presently claimed herein or in another application related to or from this application, herein disclosed are novel apparatuses, units, systems, and methods that pertain to improved handling of tubulars, details of which are described herein. 
     Embodiments of the present disclosure are described in detail with reference to the accompanying Figures. In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, such as to mean, for example, “including, but not limited to . . . ”. While the disclosure may be described with reference to relevant apparatuses, systems, and methods, it should be understood that the disclosure is not limited to the specific embodiments shown or described. Rather, one skilled in the art will appreciate that a variety of configurations may be implemented in accordance with embodiments herein. 
     Although not necessary, like elements in the various figures may be denoted by like reference numerals for consistency and ease of understanding. Numerous specific details are set forth in order to provide a more thorough understanding of the disclosure; however, it will be apparent to one of ordinary skill in the art that the embodiments disclosed herein may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description. Directional terms, such as “above,” “below,” “upper,” “lower,” “front,” “back,” etc., are used for convenience and to refer to general direction and/or orientation, and are only intended for illustrative purposes only, and not to limit the disclosure. 
     Connection(s), couplings, or other forms of contact between parts, components, and so forth may include conventional items, such as lubricant, additional sealing materials, such as a gasket between flanges, PTFE between threads, and the like. The make and manufacture of any particular component, subcomponent, etc., may be as would be apparent to one of skill in the art, such as molding, forming, press extrusion, machining, or additive manufacturing. Embodiments of the disclosure provide for one or more components to be new, used, and/or retrofitted to existing machines and systems. 
     Various equipment may be in fluid communication directly or indirectly with other equipment. Fluid communication may occur via one or more transfer lines and respective connectors, couplings, valving, piping, and so forth. Fluid movers, such as pumps, may be utilized as would be apparent to one of skill in the art. 
     Numerical ranges in this disclosure may be approximate, and thus may include values outside of the range unless otherwise indicated. Numerical ranges include all values from and including the expressed lower and the upper values, in increments of smaller units. As an example, if a compositional, physical or other property, such as, for example, molecular weight, viscosity, melt index, etc., is from 100 to 1,000. it is intended that all individual values, such as 100, 101, 102, etc., and sub ranges, such as 100 to 144, 155 to 170, 197 to 200, etc., are expressly enumerated. It is intended that decimals or fractions thereof be included. For ranges containing values which are less than one or containing fractional numbers greater than one (e.g., 1.1, 1.5, etc.), smaller units may be considered to be 0.0001, 0.001, 0.01, 0.1, etc. as appropriate. These are only examples of what is specifically intended, and all possible combinations of numerical values between the lowest value and the highest value enumerated, are to be considered to be expressly stated in this disclosure. Numerical ranges are provided within this disclosure for, among other things, the relative amount of reactants, surfactants, catalysts, etc. by itself or in a mixture or mass, and various temperature and other process parameters. 
     Terms 
     The term “connected” as used herein may refer to a connection between a respective component (or subcomponent) and another component (or another subcomponent), which may be fixed, movable, direct, indirect, and analogous to engaged, coupled, disposed, etc., and may be by screw, nut/bolt, weld, and so forth. Any use of any form of the terms “connect”, “engage”, “couple”, “attach”, “mount”, etc. or any other term describing an interaction between elements is not meant to limit the interaction to direct interaction between the elements and may also include indirect interaction between the elements described. 
     The term “fluid” as used herein may refer to a liquid, gas, slurry, single phase, multi-phase, pure, impure, etc. and is not limited to any particular type of fluid such as hydrocarbons. 
     The term “fluid connection”, “fluid communication,” “fluidly communicable,” and the like, as used herein may refer to two or more components, systems, etc. being coupled whereby fluid from one may flow or otherwise be transferrable to the other. The coupling may be direct, indirect, selective, alternative, and so forth. For example, valves, flow meters, pumps, mixing tanks, holding tanks, tubulars, separation systems, and the like may be disposed between two or more components that are in fluid communication. 
     The term “pipe”, “conduit”, “line”, “tubular”, or the like as used herein may refer to any fluid transmission means, and may (but need not) be tubular in nature. 
     The term “composition” or “composition of matter” as used herein may refer to one or more ingredients, components, constituents, etc. that make up a material (or material of construction). Composition may refer to a flow stream of one or more chemical components. 
     The term “skid” as used herein may refer to one or more pieces of equipment operable together for a particular purpose. For example, a ‘catwalk-power swivel skid’ may refer to one or more pieces of equipment operable together to provide or facilitate presenting a tubular to a derrick. A skid may be mobile, portable, or fixed. Although ‘skid’ may refer to a modular arrangement of equipment, as used herein may be mentioned merely for a matter of brevity and simple reference, with no limitation meant. Thus, skid may be comparable or analogous to zone, system, subsystem, and so forth. 
     The term “skid mounted” as used herein may refer to one or more pieces operable together for a particular purpose that may be associated with a frame- or skid-type structure. Such a structure may be portable or fixed. 
     The term “engine” as used herein may refer to a machine with moving parts that converts power into motion, such as rotary motion. The engine may be powered by a source, such as internal combustion. 
     The term “motor” as used herein may be analogous to engine. The motor may be powered by a source, such as electricity, pneumatic, or hydraulic. 
     The term “pump” as used herein may refer to a mechanical device suitable to use an action such as suction or pressure to raise or move liquids, compress gases, and so forth. ‘Pump’ can further refer to or include all necessary subcomponents operable together, such as impeller (or vanes, etc.), housing, drive shaft, bearings, etc. Although not always the case, ‘pump’ may further include reference to a driver, such as an engine and drive shaft. Types of pumps include gas powered, hydraulic, pneumatic, and electrical. 
     The term “utility fluid” as used herein may refer to a fluid used in connection with the operation of a heat generating device, such as a lubricant or water. The utility fluid may be for heating, cooling, lubricating, or other type of utility. ‘Utility fluid’ may also be referred to and interchangeable with ‘service fluid’ or comparable. 
     The term “mounted” as used herein may refer to a connection between a respective component (or subcomponent) and another component (or another subcomponent), which may be fixed, movable, direct, indirect, and analogous to engaged, coupled, disposed, etc., and may be by screw, nut/bolt, weld, and so forth. 
     The term “power swivel” as used herein may refer to a type of equipment used on a service rig or drilling rig, mainly to facilitate rotational operations. A power swivel may be powered, such as hydraulically or electrically, for handling or rotating tubulars, and may also act as a channel for drilling fluid. It also supports the weight of the drill string of pipe safely over men&#39;s heads. as used herein may refer to any driver machine or device suitable and known to one of ordinary skill in the art to impart work, typically in the form of suspending and rotating pipe. A power swivel or a top drive is an example of such a driver. A power swivel known to one of skill as being an alternative to and different from a rotary table. 
     The term “tubular handler” as used herein may refer to a mechanism, assembly, system, combination of equipment, and so forth for handling a pipe. For example, a tubular handler may have an elevator with an inclined ramp, and a chain drive skate mechanism designed to raise or lower a tubular. 
     The term “handling”, “handle”, “handler”, and the like, as used herein may refer to use of a machine (or a unit having a combination of machines, components, parts, etc.) to handle, move, deliver, present, transport, convey, etc. an object. For example, the combination unit of the present disclosure may handle a tubular, which may encompass the loading of the tubular into the unit, and then delivery of the tubular to a destination (such as a derrick for use in a workstring). The opposite may also be included. For example, the tubular may be removed from the workstring and loaded onto the unit from a rig floor, lowered to ground level, and delivered back to a tubular source. 
     The term “transfer mechanism” as used herein may refer to a mechanism for moving an object from a first position, such as a source, to a second position, such as within the combination unit. 
     Referring now to  FIGS.  2 A- 2 D  together, a top view of a combination hydraulic catwalk and power swivel; a side view of the combination hydraulic catwalk and power swivel; a side view of the combination hydraulic catwalk and power swivel with the hydraulic catwalk partially raised according to embodiments of the disclosure; and a side view of the combination hydraulic catwalk and power swivel with the hydraulic catwalk presenting a tubular to a platform according to embodiments of the disclosure, illustrative of embodiments disclosed herein, are shown. 
       FIGS.  2 A- 2 D  show a drilling operation  200  that utilizes a combination unit  201  that may be configured with a platform or other form of support structure  213  with various components attached thereon, including for transport. The platform  213  may be a trailer or a skid system configured to be towed or otherwise transported to a site for use. The unit  201  may have a tow hitch  221  or comparable form of coupler, which may be configured to facilitate transport or moving. The platform  213  may be configured with one or more outriggers or legs  219 , which may help secure or hold the unit  201  in a substantially immovable fashion. 
     The combination unit  201  may have a power swivel  210  and associated components. The power swivel  210  may be (movingly) located on one side of a center (axis) line  224  of the platform  213 . Associated components may include a hose reel  227 , a hydraulic fluid tank  228 , and a pump and engine  225 . In embodiments, a power swivel operator station  222   b  may be detachably secured to the platform  213 . The power swivel operator station  222   b  may be placed adjacent a rig operator station (not shown here) to allow a rig personnel (such as an operator, e.g.,  216 ) to control the power swivel  210 . 
     In embodiments, the unit  201  may have an operator station  222   a  for operating a pipe handling system  223 . The pipe handler  223  and a pipe loader  212  may be secured to or otherwise coupled with the unit  201 . The handler  223  and/or the pipe loader  212  may be disposed opposite centerline  208  from the power swivel  210  and associated components. In embodiments, the pipe loader  212  may include one or more pipe support arms  230  that extend(s) outward from the platform  213 . The pipe support arms  230  may have a slight grade to allow tubulars  203  to roll toward a trough  229 . The pipe loader  212  may include a pipe indexing mechanism  231  to index one tubular  203  (of a plurality of tubulars  203   a ) at a time into the trough  229 . 
     The trough  229  may be a v-shaped structure to center the tubular  203 . The trough  229  may have a pusher or skate  232  operatively and movingly associated therewith. As such, the skate  232  may be operable to push the tubular  203 , or a portion of the trough  229  in order to present the tubular  203  to the rig floor  215  (or the proximate area of the system  200  to which the tube string may be made up). 
     The pipe handler  223  may be configured with a mechanism or other suitable configuration to lift the trough  229  (or an end of the trough  229   a ) to present or bring the tubular  203  to the drilling rig  202 . The pipe handler may also or alternatively include a mechanism to lift the trough  229  (or end  229   b ) in order to adjust an angle of presentation of the tubular  203 . When presented to the rig  202  (or rig floor  215 ), the tubular  203  may be engaged (e.g., threadingly) by the power swivel  210 , lifted off the trough  229 , and then moved to a vertical position for engagement (making up) with another tubular (not shown here). The tubular  203  and/or power swivel  210  may be presented or otherwise positioned at an angle (with respect to a reference axis, such as a vertical  255   a  or a horizontal  255   b ). 
     The trough  229  may have a first end  229   b  and a second end  229   c , with the first end  229   b  being most proximate to the rig  202 . The trough  229  may have the trough end  229   b  partially or completely raised. The other end  229   c  of the trough  229  may also be raised. 
     The power swivel  210  may be operatively attached to a traveling block of the rig  202 . The pusher or skate  232  may extend or otherwise move the tubular  203  and present it to the rig  202 . The power swivel  210  may have a stem  234  for threadably engaging the tubular  203 . The traveling block of the rig  202  may then be raised to lift the tubular  203 . 
     Referring now to  FIGS.  3 A- 3 B  together, a side view of a power swivel tilted away from a vertical orientation, and a side cross-sectional view of a tilt cylinder assembly usable with the power swivel of  FIG.  3 A , illustrative of embodiments disclosed herein, are shown. 
       FIGS.  3 A- 3 B  show a power swivel  310  may have a tilt cylinder assembly  336  configured to extend a cylinder  337  (via piston  343 ). The power swivel  310  may have a normal or vertical orientation, which is typically the orientation for making up a tubular connection. Thus, the power swivel  310  may have a swivel axis  305  parallel to a vertical or other reference axis ( 255   a ,  FIG.  2 D ). 
     However, the power swivel  310  may tilt away from a vertical position, including its full range of motion or extension from the cylinder  337 . When the cylinder  337  retracts (via motion of piston  343 ), the power swivel  310  may be rotated toward a vertical position to be repositioned at a desired vertical angle. The tilt cylinder assembly  336  may control tilting of the power swivel  310  about a center point  336   a  to a tilt angle  335 . The full extension of the cylinder  337  may be adjusted to control the tilt angle  335 . In embodiments, the tilt angle  335  may be a preset tilt angle. The power swivel may have a power swivel axis  310   a . The tilt angle  335  may be the amount of angle between an original reference axis  305  and a range of movement of a stem  334 . 
     The assembly  336  may include a tilt plate  338  that may further include a tilt plate clevis  340 . In embodiments the cylinder  337  of the assembly  336  may be hydraulic. In this respect, the cylinder  337  on one end may include a piston rod  341 . 
     Extension of the tilt cylinder assembly  336  may be adjusted by using a threaded rod  342  coupled with the piston rod  341 . The threaded rod  342  may be engaged (such as threadingly) with the piston rod  341 , which may be extended and retracted via the cylinder  337 . The full rotational range may be adjusted by manipulating the extended length of the threaded rod  342 . 
     The threaded rod  342  may adjustably extend from the cylinder  337 , in that the threaded rod  342  may be threaded into or out of the cylinder  337 , as the threads may engage the piston rod  341 . As such, the tilt cylinder assembly  336  may operate to tilt the power swivel  310 . In embodiments, the tilt cylinder assembly  336  may engage a connecting means on a side opposite the tilt plate  338 . The threaded rod  342  may adjust various distances into and away from the piston rod  341 , thus adjusting the maximum tilt angle. The cylinder piston  343  may be disposed in the cylinder  337 , and may be connected to the piston rod  341 . The cylinder piston  343  may be used to extend or retract the piston rod  341 . 
     The tilt cylinder assembly  336  may include a cylinder attachment  339 , such as a bail attachment clevis, may connect the cylinder  337  to the connecting means. The cylinder may include one or more ports coupled with a fluid source. For example, there may be an extend or inlet port  344   a  for receiving a utility fluid into the cylinder  337 , allowing the fluid to act on and move the piston  343  to extend the piston rod  341 . The cylinder  337  may also have a retract port  344   b  for receiving fluid into the cylinder  337  on an opposite side of the piston  343 , whereby the fluid may push on the piston  343  in an opposite direction, and thus the piston rod  341  may retract into the cylinder  337 , at least in part. 
     The tilt cylinder assembly  336  may include a tilt plate clevis  340 , which may be secured to the threaded rod  343 , opposite the cylinder  337 . The tilt plate clevis  340  may couple the tilt plate  338  with the assembly  336 . There may be a pin  345  configured to secure the tilt plate clevis  340  movably to the tilt plate  338 . 
     In embodiments, a pneumatic remote control panel may be used and may contain meters and gauges for operating the power swivel on the rig. The pneumatic remote control panel may control power swivel tilting while keeping the operator a safe distance from the power swivel&#39;s moving components. 
     Referring now to  FIGS.  4 A and  4 B  together, a side view of a hydraulic hose reel assembly, and a rotated view of the hydraulic hose reel assembly of  FIG.  4 A , illustrative of embodiments disclosed herein, are shown. 
       FIGS.  4 A- 4 B  show the hose reel  427  may be hydraulic whereby the hose reel is coupled or in fluid communication with (directly or indirectly) a (hydraulic) fluid source (not shown here) (and/or other sources, such as an oil tank), and configured to provide or otherwise distribute the fluid to other components in fluid communication therewith. The reel  427  may have a first wheel  417 , a second wheel  418 , a drum  446  (which may be mounted between the wheels  417 ,  418 ), a ring gear  447  secured to the drum  446 , a pinion gear  448  (which may be coupled with the ring gear  447 ), and a reel drive motor  450  (which may be connected to the pinion gear  448 ). The reel  427  may include a plurality of ports, such as ports  449   a, b, c  configured for the flow of fluid therethrough. 
     In embodiments, the drive motor  450  may operably connect to the pinion gear  448 , thereby rotating the pinion  448  engaging with the ring gear  447 , and thereby rotating the wheels  417 ,  418  and drum  446 . 
     The hose reel assembly  427  may include a plurality of fluid flow pathways. In embodiments, a power swivel (e.g.,  210 ) may utilize a novel fluid flow path or circuit to retract to a vertical position, which may reduce the number of needed hoses from five in a typical installation, to four, thus simplifying the reel arrangement. 
     The hose reel  427  may have a plurality of hoses therewith, which may be coupled with a fluid source(s), other components, and so forth, whereby fluid flow may be provided thereby to anything in fluid communication with the hose reel  427 . There may be a first hose  456   a  and a second hose  456   b  in fluid communication with a rotational mechanism such as a hydraulic motor of a component coupled therewith, such as the power swivel. There may be a third hose  456   c  in fluid communication with a drain of the rotational mechanism of the component, as well as a fourth hose  456   d  in fluid communication with the component for supplying fluid to tilt the component. 
     Referring now to  FIGS.  5 A- 5 E  together, an isometric front view of a combination tubular and power swivel handling unit in a first position, an isometric front view of the combination unit of  FIG.  5 A  in an intermediate position, an isometric front view of the combination unit of  FIG.  5 A  having another intermediate position with an extended telescoping trough, an isometric front side view of the combination handling and transport unit of  FIG.  5 A  in a delivery position where a tubular and a power swivel are presented to a rig floor, and an isometric front view of a power swivel of a drill rig coupled with a tubular delivered to the drill rig from a combination unit, illustrative of embodiments disclosed herein, are shown. 
       FIGS.  5 A- 5 E  show a drilling operation or system  500  having the combination tubular and power swivel handling unit  501 . While referred to as ‘drilling’, the working operation or system  500  is not meant to be limited, as there are a number of instances and operations where the unit  501  may be used. 
     The combination unit  501  may be operated or otherwise used in a manner to provide, control, facilitate, etc. handling and transport of one or more components. In embodiments, the unit  501  may provide delivery of either a tubular  503  or a power swivel  510  to a rig or derrick  502 . While it need not be exactly the same, the unit  501  may be assembled, run, and operated as described herein and in other embodiments (such as for unit  201 , and so forth), and as otherwise understood to one of skill in the art. 
     Components of the unit  501  may be arranged by, disposed on, or otherwise coupled with a trailer or support frame  513 , and as otherwise understood to one of skill in the art. Thus, the unit  501  may be comparable or identical in aspects, function, operation, components, etc. as that of other unit embodiments disclosed herein (e.g.,  201 ). Similarities may not be discussed for the sake of brevity. 
     Associated or auxiliary equipment including automation, controllers, piping, hosing, valves, wiring, nozzles, pumps, gearing, tanks, etc. may be shown only in part, or may not be shown or described, as one of skill in the art would have an understanding of coupling the components of the unit  501  for operation thereof. For example, a pump (with engine)  525  may be in fluid communication with one or more sources, such as a fluid tank, with the unit  501  (or its components) being in fluid communication with a discharge of the pump (such as via a manifold, piping, tubing, etc.). All components of the unit  501  requiring power or automation may be provided with wiring, tubing, piping, etc. in order to be operable therefore. 
     The unit  501  may be used with and part of the drilling system  500 . As such, the system  500  may include the derrick  502  configured with suitable components to rotate a drill string  504 . The drill string  504  may be rotated with the driver  510 , typically a top drive or power swivel type mechanism (with associated elevator, drive frame, drawworks, etc.). 
     The unit  501  may be positioned proximate the derrick  502 , whereby the unit  501  may be operated in manner to deliver one or more tubulars  503   a  and other equipment (such as driver  510 ) to and from a rig floor or working platform  515 . The plurality of tubulars  503   a  may be transferred to and from a tubular source  512  via the unit  501  (typically one at a time). The tubular source  512  may include a pipe rack  512   a  having the plurality of tubulars  503   a  thereon. The unit  501  may have a transfer mechanism  597  to accommodate the transfer of the tubular  503  to and from the unit  501 . 
     To any extent embodiments herein are described for the transfer of tubulars and equipment to the derrick  502 , one of skill would appreciate that as a job or operation is finished or otherwise at a stopping point, the tubulars  503   a  may be removed (e.g., from the wellbore) in a similar albeit opposite manner, and thus the unit  501  operable to transfer tubulars  503   a  back to the source  512  and the power swivel  510  back to a support rack  551 . Accordingly, the unit  501  may be configured with a mechanism or kicker (not shown here) to initiate transfer of tubulars  503   a  therefrom. 
     The support rack  551  may be movingly coupled with the support frame  513 , and also operably engaged with a power source (such as a hydraulically movable piston/rod). Thus, the support rack  551  may be moved from a first or lowered position to a second or raised position. In embodiments, the first position may have an angle of rotation of 45 degrees to 120 degrees from the second position. 
     The transfer mechanism  597  may include a plurality of tubular handling arms  530   a,b . The tubular handling arms  530   a,b  may be movingly coupled with the support frame  513 , and also operably engaged with a power source (such as a hydraulically movable piston/rod). The handling arms  530   a,b  may be positional to have a (slight) grade one way or another to allow the tubular(s)  503  to roll toward or away from a trough assembly  598 , as may be applicable. 
     The trough assembly  598  may include a soft low torque pipe grabber to hold pipe against spinup torque of a power swivel if so used. 
     The unit  501  may be configured with one or more movable outriggers, extensions, legs etc.  519  coupled with the support  513 , which may help secure or hold the unit  501  in a substantially immovable fashion. 
     The combination unit  501  may have the power swivel  510  movingly disposed thereon. That is, the power swivel  510  may be positioned within the power swivel support or rack  551 . One or more components operatively associated (and connected, directly or indirectly) with the power swivel  510  may include any of a hose reel  527 , a fluid tank(s) (not shown here), and a pump and engine  525 . There may be one or more hoses  556  coupled between the power swivel  510  and the hose reel  527 . The hose reel  527  may be configured with an amount of tension to aid or facilitate rolling up and unrolling of the hoses  556 . Any or all of the hoses  556  may be of sufficient length to accommodate moving the power swivel  510  to a height h. 
     Referring briefly to  FIGS.  6 A,  6 B, and  6 C  together, a close-up isometric view of a power swivel disposed on a support rack of a combination unit, a close-up isometric view of the support rack moved to a raised position, and a close-up side view of the power swivel lifted off the support rack, illustrative of embodiments disclosed herein, are shown. 
       FIGS.  6 A- 6 C  together show a combination tubular and power swivel handler unit  501  may have a support frame  513  with one or more components coupled therewith, including movingly. For example, the combination unit  501  may have a trough assembly  598  (associated with a tubular handler) movingly coupled with the support frame  513 . The combination unit  501  may also have a power swivel support rack  551  movingly coupled with the support frame  513 . The power swivel support rack  551  may be movable from a first or lowered position ( FIG.  6 A ) to a second or raised position ( FIG.  6 B ). 
     There may be a hose reel  527  disposed on the unit  501 . The hose reel may be disposed underneath an end  529   b  of the trough assembly  598 . The hose reel  527  may have a set of hoses, such as one or more hoses  556 . Any of the hoses  556  may be also coupled with the power swivel  510 , such that the power swivel  510  may be in fluid communication with the hose reel  527 , as well as a fluid source. The hose reel  527  may be configured for the hose  556  to readily unroll therefrom as the power swivel  510  is raised (and vice versa). 
     The support rack  551  may include one or more movable support rack arms  568 . As shown here, there may be two support rack arms  568 , each arm  568  being coupled with a respective powered (such as hydraulic) support rack piston/rod assembly  569 . A rod  570  of the assembly  569  may be extendable/retractable therefrom corresponding to movement of the arm  568 . 
     While not limited to any particular way of resting on the support rack  551 , the power swivel  510  may have one or more support posts  567  extending therefrom. The support posts  567  may be configured to reside within a post receptacle  571  on the end of the support rack arm  568 . 
     As the trough assembly  598  is raised by a raising leg  552 , driver lifting hooks  557  may engage the support posts  567 , and thus raise the power swivel from the support rack  551 . The power swivel  510  may then be delivered to the derrick ( 502 ,  FIG.  5 E ), including with hoses  556  coupled therewith. The unit  501  may accomplish in reverse the delivery of the power swivel  510  from the derrick to the support rack  551  (including with hoses  556  rolling up back around hose reel  527 ). 
     Returning again to  FIGS.  5 A- 5 E , the unit  501  may include an operator station  522 . As the unit  501  may combine functionality, one of skill would appreciate that all operations associated with operating the tubular handler  526  (including operation of the trough assembly  598 ) and transfer mechanism  597 , as well as operation of the power swivel  510  (including while on the derrick  502 ), may be accomplished by personnel  516  via the operator station  522 , without need for other operator stations. The station  522  may be detachably secured to the support  513 . Alternatively, a separate remote control panel placed on the rig floor for the rig operator&#39;s control of power swivel  510 . 
     The tubular handler  526  and transfer mechanism  597  may be movingly secured to or otherwise coupled with the support frame  513 . The transfer mechanism  597  may include an indexing mechanism (not viewable here) to index one tubular  503  (of a plurality of tubulars  503   a ) at a time into the trough assembly  598 . 
     The trough assembly  598  may include a main trough  529 . The trough assembly  598  may have a portion thereof (such as an end  529   a ) configured for lifting the power swivel  510  off the rack  551 . 
     The trough assembly  598  may have a carrier trough  529   a  movingly engaged with the main lifting arm  529 . For example, the trough  529   a  may be telescopingly movable with respect to the main lifting arm  529 , thereby providing additional length to which the trough assembly  529  may reach. In embodiments, the trough  529   a  may extend between and including 0 feet and 50 feet out from the main trough  529 . 
     Movement of the secondary trough  529   a  may be via a sprocket and chain mechanism, rollers, and so forth, which may be powered in a manner known to one of skill in the art. The trough  529   a  may have one or more lifting hooks  557  configured to lift the power swivel  510  from the rack  551  (and vice versa). The trough  529   a  may have soft low torque backup for the power swivel  510  (including while in a tilted position) into box connection of the tubular(s)  503 . 
     Alternatively, a grabber function may be added to a power swivel to safely react the spinup torque applied by the power swivel. 
     Although not limited to any particular shape other than what might otherwise be suitable to hold the tubular  503 , either of the troughs  529 ,  529   a  may be a general v-shaped structure (in lateral cross-section), which may be useful to center the tubular  503 . The trough assembly  598  may have a pusher or skate  532  operatively and movingly associated therewith. As such, the skate  532  may be operable to push the tubular  503  (or a portion of either troughs  529 ,  529   a ) in order to present the tubular  503  to the rig floor  515  (or the proximate area of the system  500  to which the string  504  may be made up). As such, the skate  532  may be movable via a sprocket and chain mechanism, rollers, and so forth, which may be powered in a manner known to one of skill in the art. 
     Spinup function may be used for powered spinup of the tubular  503  onto the pin (or stem) of the power swivel or without rotating serve as a backup against the spinup torque supplied by the power swivel. 
     The skate  532  may be part of an assembly configured to include a spin-up function. Accordingly there may be a device hinged atop a skate frame arranged with one or more jaw protrusions attached to a body allowing vertical motion within the “vertical center plane” of the trough such that when a connected actuator urges the body down upon a tubular so delivered to the trough center plane by a pipe handling system, said jaw protrusions on either side of said tubular, arranged to fit or hydraulically adjustable to fit the OD of various sized tubulars, will clamp on said tubular to provide a “backup” or reactive/resisting torque when said tubular is rotated by a powered rotating device such as a power swivel or hydraulic pipe wrench when said powered rotary device is used to apply a low spinup torque to a threaded connection of a tubular laying in a trough. 
     The tubular handler  526  may be configured with a mechanism or other suitable configuration to lift the trough assembly  598  (including an end of the trough  529   c ) to present or bring the tubular  503  to the drilling rig  502 . As shown here, there may be a raising leg  552  movingly (such as slidingly) coupled with the trough  529 . The raising leg  552  may be powered by a raising leg piston  596 . As the raising leg piston  596  is powered, a raising leg piston rod  596   a  may extend therefrom and raise the raising leg  552 , which results in raising of the trough  529 . 
       FIG.  5 A  shows the trough assembly  598  in a first or lowered position  599   a , where the piston rod  596   a  is retracted;  FIGS.  5 B and  5 C  show the trough assembly  598  in a raised intermediate position(s)  599   b ,  599   c ;  FIG.  5 D  shows the trough assembly  598  in a delivery position  599   d . It would be appreciated that the delivery position  599   d  need not include the trough  529  moved to its highest position and/or the secondary trough  529   a  extended therefrom. Thus, the delivery position  599   d  may be tantamount to that of any intermediate position of the trough/trough assembly  529 / 598 . 
     The raising leg  552  may be movingly (e.g., pivotably) coupled with the support frame  513 , such as seen at first leg connection point  595   a . The raising leg  552  may be movingly (e.g., slidingly) coupled with the trough  529 , such as seen at second leg connection point  595   b . A plurality of connection points are possible, whereby the raising leg  552  may be coupled with the frame support  513  at two or more points and/or may be coupled with the trough  529  at two or more points. 
     Referring briefly to  FIGS.  7 A and  7 B  together, an underside view of a trough assembly coupled with a raising leg, and an underside view of the trough assembly, in accordance with embodiments herein, are shown. 
       FIGS.  7 A and  7 B  show The trough assembly  598  may have a portion thereof coupled with a raising leg  552 . As shown in the figures, an underside  529   d  of the trough  529  may have a trough housing  563 . From the trough housing  563 , there may be an at least one bullet slider  564   a  (or just ‘slider’) extending therefrom. In embodiments, there may be a first slider  564   a  and a second slider  564   b . While not limited to any particular shape, the sliders  564   a,b  may be configured to slidingly engage within a guide rail(s)  562  of the raising leg  552 . 
     As shown, the raising leg  552  may slidingly engage with the trough assembly  598  on a first leg side  552   a  and a second leg side  552   b.    
     Each of the sides  552   a,b  may be configured with respective guide rails  562 . The guide rail  562  may be configured with a ratchet structure  566 , which may include alternating crest  566   a  and trough  566   b  structure. A locking dog  565  may be configured to navigate or move through the ratchet  566  in a first direction over each adjacent crest/trough, but is locked from moving in the opposite direction. It follows that the raising leg  552  and trough assembly  598  may slidingly move with respect to each other in the first direction, but may not in the opposite direction (unless and until the locking dog  565  is released/moved). 
     The locking dog  565  may be or include an assembly having have a spring-loaded (Rod-side) hydraulic cylinder that with pressure, which may be suitable to overcome a spring force and release the dog from engagement with the ratchet structure  566 . 
     For example, extension of a cylinder by hydraulic pressure may release the dog  565 . As such, loss of pressure may allow a rod-side spring to retract a cylinder and engage the latch on any crest/trough of the ratchet  566  (not shown here). 
     In embodiments dog  565  (or assembly) may include a dog-latch upper extension in contact with the selector pin  559 , which by initial contact force may engage the dog  565  just before the slider(s) contacted the pin  559 . 
     Any of the raising leg sides  552   a,b  may also be configured with a set or row of selector pin holes  558 . An end  559   a  of a selector pin(s)  559  may be pushed or otherwise disposed through the pin holes  558 . The end  559   a  may be of suitable shape, length, etc. to be a mechanical stop to the respective slider  564   a,b  (see partial view of  FIG.  6 B ) at connection point  595   b.    
     Returning again to  FIGS.  5 A- 5 E , once the sliders ( 564   a,b ,  FIG.  6 A ) hit a selector pin  559  (disposed within an least one hole of a row of selector holes  558 ), the raising leg  552  may continue to lift the trough  529 , as well as following leg  553 . While not meant to be limited, the raising leg  552  may have a raising leg range of motion in a range of about 0 degrees (generally  FIG.  5 A ) to about 130 degrees (generally  FIG.  5 D ) with respect to a horizontal axis  555   b . The raising leg  552  may be moved to a raising leg angle in a suitable manner whereby the trough assembly  598  may reach the rig floor  515  at a height h. The height h may be in a height range of about 5 feet to about 100 feet. 
     The position of the selector pin  559  may be readily and easily changed to accommodate different elevation requirements. The position of the selector pin  559  may be changed while the tubular handler  526  is in the lowered or first position. 
     The tubular handler  526  may also or alternatively include a mechanism to lift the trough  529  (or end  529   b ) in order to adjust an angle of presentation of the tubular  503 . Thus, the angle of presentation may vary (compare elevation of end  529   b  in  FIG.  5 A  to  FIG.  5 D ). 
     An angle of presentation  535   a  of the tubular  503  may be substantially parallel to a tilt angle  535  of the driver  510 .  FIG.  5 E  illustrates the driver  510  coupled with a travelling block  554  (of a derrick  502 ) may have a driver axis  510   a . As a driver stem  534  of the driver  510  may be tilted, the driver stem  534  may be presented at the driver tilt angle  535  (such as with reference to a vertical axis  555   a ) for mating with a tubular  503 . 
     In a similar manner, the tubular  503  may have a (longitudinal) axis  503   b . The tubular may be presented (delivered) via the trough assembly  529  to personnel  516  on a rig floor  515  of the derrick  502 . The tubular  503  may be presented with the angle of presentation of the tubular  535   a . While it need not be exact, the driver angle  535  and the angle of presentation  535   a  may be (substantially) parallel. 
     The following leg  553  may have movingly (e.g., pivotably) coupled with the support frame  513 , such as seen at first following leg connection point  594   a . The following leg  553  may be movingly (e.g., pivotably) coupled with the trough  529 , such as seen at second following leg connection point  594   b . A plurality of connection points are possible, whereby the following leg  553  may be coupled with the frame support  513  at two or more points and/or may be coupled with the trough  529  at two or more points (such as on each side of the following leg  553 ). 
     While not meant to be limited, the following leg  553  may have a following leg range of motion in a range of about 0 degrees (generally  FIG.  5 A ) to about 130 degrees (generally  FIG.  5 D ) with respect to the horizontal axis  555   b . The following leg  553  may be moved to a following leg angle in a suitable manner whereby the trough assembly  598  may reach the rig floor  515  at the height h, and also the desired presentation angle may be achieved. 
     Once delivered, the driver  510  may be operatively attached to a traveling block or other suitable component(s)  554  of the rig  502 . The pusher or skate  532  may extend or otherwise move the tubular  503  and present it to the rig  502 . The driver  510  may have a stem  534  for threadably engaging the tubular  503 . The traveling block  554  of the rig  502  may then be raised to lift the tubular  503 . When presented to the rig  502  (or rig floor  505 ), the tubular  503  may be engaged (e.g., threadingly) by the driver  510 , lifted off the trough  529 , and then moved to a vertical position for engagement (making up) with another tubular (not shown here). 
     Advantages 
     Embodiments of a combination pipe handling and power swivel unit provide for a unique tubular handling unit that brings many benefits including safety, speed, and economic benefit. 
     This unit may be height adjustable without dangerous pinning, and may reach rig floors as high as forty feet without an extension. For spin up, a power swivel may automatically move to a same preset angle as the tubular laying in handler. Spin up torque may be backed up by a soft hydraulic tubular backup device. 
     Alternatively, if power swivel rotation is not desired by customer, the pipe handler may provide pipe rotation onto the pin of the non-rotating power swivel. 
     The unit may safely move the power swivel (or other tools, devices, components, etc.) to and from a rig floor, without the need for winching. The unit may move a control panel and control umbilical to personnel on the rig floor. Therefore, the need for climbing stairs and man-carrying a panel is mitigated or eliminated. When the power swivel is not in use, it may move to an out of the way park position. 
     Embodiments herein may reduce liability up to 50% by eliminating the need for additional personnel, as only one driver, truck, trailer, etc. need be used instead of two. And height adjustment required for various rig floor heights requires no dangerous pinning. 
     Other advantages herein may include less initial cost than separated, conventional pipe handler and power swivel units. Synergistically there may be less operating cost than two separate units (e.g., savings from labor, fuel, insurance, etc.), as well as less maintenance and storage cost than two separate units (only one trailer, engine, hydraulic system, etc.), space saving (only one footprint at rig site), and reduced environmental impact (one unit, one hydraulic system, one engine, etc. 
     Still other advantages include time savings, range of pipe length without extensions (tubular length capacity to 48′—no extension required), handling upwards of 2000 lb joints of pipe up to 5½″ casing without adjustment, and flexible usage (service companies may offer either/both power swivel or tubular handling services with one unit). 
     Even a small savings in drilling or servicing time of individual wells results in an enormous savings on an annual basis. 
     While preferred embodiments of the disclosure have been shown and described, modifications thereof may be made by one skilled in the art without departing from the spirit and teachings of the disclosure. The embodiments described herein are exemplary only and are not intended to be limiting. Many variations and modifications of the embodiments disclosed herein are possible and are within the scope of the disclosure. Where numerical ranges or limitations are expressly stated, such express ranges or limitations should be understood to include iterative ranges or limitations of like magnitude falling within the expressly stated ranges or limitations. The use of the term “optionally” with respect to any element of a claim is intended to mean that the subject element is required, or alternatively, is not required. Both alternatives are intended to be within the scope of the claim. Use of broader terms such as comprises, includes, having, etc. should be understood to provide support for narrower terms such as consisting of, consisting essentially of, comprised substantially of, and the like. 
     Accordingly, the scope of protection is not limited by the description set out above but is only limited by the claims which follow, that scope including all equivalents of the subject matter of the claims. Each and every claim is incorporated into the specification as an embodiment of the present disclosure. Thus, the claims are a further description and are an addition to the preferred embodiments of the present disclosure. The inclusion or discussion of a reference is not an admission that it is prior art to the present disclosure, especially any reference that may have a publication date after the priority date of this application. The disclosures of all patents, patent applications, and publications cited herein are hereby incorporated by reference, to the extent they provide background knowledge; or exemplary, procedural or other details supplementary to those set forth herein.