Patent Publication Number: US-11021932-B2

Title: Auto-bleeding setting tool and method

Description:
BACKGROUND 
     Technical Field 
     Embodiments of the subject matter disclosed herein generally relate to downhole tools for well operations, and more specifically, to an auto-bleeding setting tool used in a well for actuating an auxiliary tool. 
     Discussion of the Background 
     During well exploration, various tools are lowered into the well and placed at desired positions for plugging, perforating, or drilling the well. These tools are placed inside the well with the help of a conduit, e.g., a wireline, electric line, continuous coiled tubing, threaded work string, etc. However, these tools need to be activated or set in place. The force needed to activate such a tool is large, for example, in excess of 15,000 lbs. In some instances, such a large force cannot be supplied by the conduit noted above. 
     A pyrotechnic setting tool is commonly used in the industry to activate the tools noted above. For example, a Baker style E-4 wireline pressure setting tool utilizes an externally mounted, manually operated, rupture type disc in order to release the internal high pressure gas once the setting tool is returned to the surface. 
     This setting tool  100  is shown in  FIG. 1  and includes a firing head  102  that is connected to a pressure chamber  104 . The firing head  102  ignites a primary igniter  103 , which in turn ignites a power charge  106 , which generates a high pressure gas  108 . Note that a secondary igniter may be located between the primary igniter and the power charge to bolster the igniting effect of the primary igniter. 
     A cylinder  110  is attached, through a manual bleeder valve sub  105 , having a connection  105 A (e.g., threaded connection), to a housing  107  of the pressure chamber  104  and this cylinder fluidly communicates with the pressure chamber. Thus, when the power charge  106  burns, the high pressure gas  108  generated inside the pressure chamber  104  is guided into the cylinder  110 . A floating piston  112 , which is located inside the cylinder  110 , is pushed by the pressure of the gas  108  to the right in the figure. Oil  115 , stored in a first chamber  114  of the cylinder  110 , is pushed through a connector sub  116  and a metering orifice  117 , which are formed in a block  118  that is connected to the cylinder  110 , to a second chamber  120 , which is formed in a lower second cylinder  121 . A second piston  122  is located in the lower second cylinder  121 . Under the pressure exerted by the oil  115 , the piston  122  and a piston rod  124  move downstream while exerting a large force on a crosslink  126 , which transfers that force developed internally to moveable external crosslink sleeve  128 . A setting sleeve  131  for the wellbore tool  150  to be set is attached to the lower end of the crosslink sleeve  128 . The wellbore tool  150  is attached to the setting mandrel  133  by releasable means such as a partible stud, shear screws, etc. 
     Thus, when the setting tool is actuated, the setting sleeve  131  pushes components of the wellbore tool  150  to expand gripping members and a rubber packing while, at the same time, the setting mandrel  133  is holding the wellbore tool&#39;s interior body. When a predetermined force is reached, the releasing means fails, which frees the setting tool  100  for retrieval while the wellbore tool  150  is set. Note that cylinder  121  has the downstream end  130  sealed with a cylinder head  132  that allows the piston rod  124  to move downstream. 
     After the setting tool has been recovered to the surface, a large volume of pressurized gas  108  exists internally and must be bled away in order to clean and ready the setting tool for reuse. This high pressure gas  108  has comingled with the oil  115  used to stroke the wellbore tool, therefore rendering the oil too contaminated for reuse. Thus, this oil needs to be removed from the setting tool and be disposed of to prepare the setting tool for another use. To remove the high pressure gas and replace the contaminated oil, the entire setting tool must be disassembled and the parts cleaned and reassembled. This is not only time consuming, but also dangerous (bleeding the gas pressure off), especially at remote locations with improper faculties. 
     Relieving the high pressure gas  108  inside the pressure chamber  104  is not only dangerous to the health of the workers performing the task, because of the toxic gases left behind by the burning of the power charge, but is also a safety issue because the high pressure gas remaining inside the pressure chamber is high enough to injure the workers if its release procedure is not adhered to. 
     In this regard, note that the traditional setting tool  100  has a release valve  140  that is used for manually venting the high pressure gas from inside the pressure chamber. However, when the release valve  140  is improperly removed from the pressure chamber, the valve can become a flying projectile and injure the person removing it. For this reason, a dedicated removing procedure is put in place and also a safety sleeve is used to cover the release valve for relieving the pressure from the setting tool. 
     However, this procedure is cumbersome, time consuming and still, if a person misses any detail of the procedure, that person can get hurt by the release valve. Thus there is a need to create a safe method of automatically bleeding the high gas pressure from inside the setting tool while the setting tool is still inside the well bore. There is also a need to prevent comingling of the high pressure gas with the oil used to create the stroke motion of the setting tool. If these goals can be achieved, then once the setting tool is returned to the surface, all that would be required to do to return the setting tool to service is to wash out the ballistic power charge chamber, replace the expendables, and push the oil/piston back to their original position. Thus, there is a need for such an advanced setting tool. 
     SUMMARY 
     According to an embodiment, there is a setting tool for setting an auxiliary tool in a well. The setting tool includes a housing holding a floating piston assembly, an isolation valve assembly in fluid contact with an interior of the housing, and a frangible disc located to prevent a high-pressure gas to pass through a bore of the floating piston assembly. 
     According to another embodiment, there is a retrofitting kit for a setting tool for setting an auxiliary tool in a well. The retrofitting kit includes an isolation valve assembly to be located in a housing of the setting tool, and a floating piston assembly having a frangible disc. The frangible disc is located to prevent a pressured gas to move past the floating piston assembly into the housing. 
     According to still another embodiment, there is a method for shutting off a flow of oil and venting out a pressured gas from a setting tool. The method includes a step of lowering a setting tool into a well; a step of activating the setting tool so that a pressured gas is generated in the setting tool, and the pressured gas acts on a frangible disc that seals a bore of a floating piston assembly, where the disc prevents the pressured gas to move past the floating piston assembly; a step of translating an isolation valve assembly located in a housing of the setting tool to shut off a flow of oil; a step of opening a side port formed in the housing; and a step of breaking the frangible disc of the floating piston assembly to expel the pressured gas outside the housing, through the side port. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate one or more embodiments and, together with the description, explain these embodiments. In the drawings: 
         FIG. 1  illustrates a setting tool that needs to be retrieved to the surface for manually removing pressurized gas from inside; 
         FIG. 2  illustrates an auto-bleeding setting tool that also automatically shuts off an oil flow; 
         FIG. 3  illustrates a floating piston assembly that is part of the auto-bleeding setting tool; 
         FIG. 4  illustrates an isolation valve assembly that is also part of the auto-bleeding setting tool; 
         FIG. 5  illustrates the floating piston assembly and the isolation valve assembly placed inside a housing of the auto-bleeding setting tool; 
         FIG. 6  is a flowchart of a method for activating the auto-bleeding setting tool; 
         FIG. 7  illustrates the auto-bleeding setting tool when the floating piston assembly moves towards the isolation valve assembly; 
         FIG. 8  illustrates the auto-bleeding setting tool when the floating piston assembly has engaged the isolation valve assembly; 
         FIG. 9  illustrates the path of a pressured gas through the floating piston assembly; 
         FIG. 10  illustrates the path of the pressured gas through the isolation valve assembly; 
         FIG. 11  illustrates the auto-bleeding setting tool when deployed in a well; and 
         FIG. 12  is a flowchart of a method for actuating the auto-bleeding setting tool. 
     
    
    
     DETAILED DESCRIPTION 
     The following description of the embodiments refers to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. The following detailed description does not limit the invention. Instead, the scope of the invention is defined by the appended claims. The following embodiments are discussed, for simplicity, with regard to a setting tool. However, the embodiments discussed herein are also applicable to any tool in which a high-pressure gas is generated and then that high-pressure gas needs to be released outside the tool quickly and in efficient manner. 
     Reference throughout the specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with an embodiment is included in at least one embodiment of the subject matter disclosed. Thus, the appearance of the phrases “in one embodiment” or “in an embodiment” in various places throughout the specification is not necessarily referring to the same embodiment. Further, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. 
     According to an embodiment, an auto-bleeding setting tool has a floating piston assembly that separates the burnt gas (the gas that creates the residual unwanted pressure) from the oil that is used to set the wellbore device attached to the setting tool. The floating piston assembly incorporates a through bore that is temporally blocked by a frangible o-ring sealed disc that is held in place by a disc retainer. Placed inside the disc retainer is a rupture pin or bleed pin, which is held in a retarded position by two or more frangible shear screws. All elements of the floating piston assembly move as one when subjected to gas pressure produced by the burning pyrotechnic power charge. The floating piston assembly is placed inside a cylinder that is connected to the pressure chamber. The void space inside the cylinder, below the floating piston assembly, is filled with oil and the configuration of the floating piston assembly prevents the generated gas from comingling with the oil. The novel floating piston assembly can be retrofitted to an existing setting tool as now discussed. 
       FIG. 2  shows a setting tool  200  (for example, a Baker setting tool) that has been retrofitted with a retrofitting kit  202  that includes a floating piston assembly  220  and an isolation valve assembly  240 . All the other elements of the setting tool  200  may be the ones shown in  FIG. 1  and discussed above. Thus, their description is omitted herein. The floating piston assembly  220  is placed inside the upstream end of a housing  110 . In this application, the term “upstream” is used to indicate a direction toward the head of the casing and the term “downstream” is used to indicate a direction toward the toe of the well. The void space  114  below the floating piston assembly  220  is filed with a measured column of oil  115  or a similar hydraulic fluid and for this reason the void space  114  will be described as hydraulic chamber  114 . The floating piston assembly  220  and the isolation valve assembly  240  are now discussed in more detail with regard to  FIGS. 3 and 4 . 
       FIG. 3  shows the floating piston assembly  220  having a piston body  221 , a retainer nut  225  placed inside the body  221 , and a bleed pin  226  partially located inside the piston body  221  and the retainer nut  225 , and partially outside these elements. An outer portion of the retainer nut  225  is threaded, and it is configured to engage a mating thread  222  formed in the piston body  221 . The piston body  221  has a passage  228  that extends throughout the body. A frangible disc (e.g., made of metal)  223  is placed to close and seal the passage  228 , as illustrated in the figure. In one application, o-rings  224  may be located between the body  221  and disc  223  to prevent the high pressure gas and/or the oil to move past the disc. The retainer nut  225  holds the disc  223  in place inside the piston body  221 . The bleed pin  226  has a first end  226 A (or boss) that faces the disc  223 . In one embodiment, there is a small gap between the first end  226 A and the disc  223 . However, in another application, the first end  226 A is softly touching the disc  223 . 
     The bleed pin  226  has a second end  226 B, which is opposite to the first end  226 A. The second end  226 B has a partial bore  226 C extending longitudinally along the bleed pin and starting on a downstream face, and also has a port  226 D formed in a side of the bleed pin. Note that the partial bore  226 C does not extend through the entire bleed pin. The partial bore  226 C and the port  226 D fluidly communicate with each other. 
     The bleed pin  226  is attached to the retainer nut  225  with two or more breakable pins  227 . The bleed pin  226  has a shoulder  231  that mates with a corresponding shoulder  230  formed in the passage  228  of the piston body  221 , when the bleed pin moves towards the retainer nut. However, in the initial configuration shown in  FIG. 3 , the two shoulders  230  and  231  are separated from each other, so that a passage  232  is formed between them. Further passages  229  are formed in the piston body  221  so that the high pressure gas from the hydraulic chamber can move through the floating piston assembly  220 . 
     One or more o-rings  234  may be located on the outer part of the body  221  to seal an interface between the body and the housing  210 , when the floating piston assembly  220  is placed inside the housing. Note that the floating piston assembly  220  of  FIG. 3  is shown in  FIG. 2  as being located at the upstream end of the housing  210 . However, as will be discussed later, the floating piston assembly  220  will move downstream to engage the isolation valve assembly  240 . Also note that the housing  210  may include not only a cylinder, as shown in the figures, but one or more subs or other connecting parts. Also, the floating piston assembly  220  and the isolation valve assembly  240  may be located in any of these parts of the housing. 
     The isolation valve assembly  240  is now discussed with regard to  FIG. 4 . The isolation valve assembly  240  connects to and seals the downstream end of the housing  210  shown in  FIG. 2 . The isolation valve assembly  240  includes a connector body  441 , which is attached by threads  441 A to the housing  210 . The connection may be sealed with o-rings  410 . The body  441  has an internal bore  442  that extends through the entire body  441 . A sleeve insert  444  is provided inside the bore  442 . The sleeve insert  444  is attached with threads  444 A to the bore  442 . Thus, the sleeve insert  444  cannot move relative to the body  441 . In one embodiment, the body  441  is machined to replicate the sleeve  444  so that no additional sleeve is necessary. In this case, the body  441  and the sleeve  444  are formed as a single integral part. 
     Sleeve insert  444 , in turn, has its own bore  446  into which a moveable isolation valve  450  is located. The moveable isolation valve  450  is attached in  FIG. 4  to the sleeve insert  444  by one or more shear screw  448  (or any other breakable element) so that the sleeve insert  444  and the moveable isolation valve  450  do not initially move relative to each other, i.e., the moveable isolation valve  450 &#39;s movement is restrained. Two o-rings  455  are placed between the moveable isolation valve  450  and the sleeve insert  444  and the body  441  to straddle perpendicular ports  456  formed in the body  441 , i.e., to block a fluid to exit the isolation valve assembly  240  through the port  456 . However, the moveable isolation valve  450  has passages  458  and slots  460  that allow the fluid inside the bore  450 A, of the moveable isolation valve  450 , to move past the moveable isolation valve  450 , when the sleeve insert  444  is connected to the moveable isolation valve  450 . Note that slots  460  in  FIG. 4  fluidly communicate with passage  462 . The passage  458  formed at the downstream end  454  of the moveable isolation valve  450  fluidly communicate with a sealing bore  459  and a metering orifice  470  formed in the body  441 , at its downstream end. The sealing bore  459  and the metering orifice  470  are in fluid communication with the bore  442 . The sealing bore  459  has one or more o-rings  472  for sealing the sealing bore  459  when the moveable isolation valve  450  is moved downstream, as discussed later. The isolation valve  450  has an outer shoulder  480  that mates with an inner shoulder  482  of the insert  444 , so that a travel distance of the isolation valve  450  is limited, i.e., it is stopped when the two shoulders  480  and  482  are in contact with each other. 
     Oil  115  from the hydraulic chamber  104  (see  FIG. 2 ) enters the bore  450 A of the isolation valve  450  as shown in  FIG. 4 . When the isolation valve  450  is still attached to the sleeve insert  444 , the oil  115  can move through bore  450 A of the isolation valve  450 , then through ports  458  to the sealing bore  459 , metering orifice  470  and then to the second chamber  120 , that holds the second piston  122  (which is also shown in  FIG. 2 ) for actuating the wellbore tool  150 . However, this path would be automatically closed when the isolation valve  450  moves downstream relative to the body  441 , as discussed later. 
       FIG. 5  shows the setting tool  200  having the floating piston assembly  220  and the isolation valve assembly  240  both placed inside the housing  210 , and ready to be actuated. A method for actuating this setting tool  200  is now discussed with regard to  FIG. 6 . In step  600 , the setting tool  200  shown in  FIG. 5  is attached to a wellbore tool  150  (see  FIG. 2 ) and both elements are lowered into the well. The wellbore tool  150  may be a bridge plug or a packer. In step  602 , the setting tool is actuated by, for example, igniting the primary igniter  103 . The primary igniter  103  ignites the power charge  106  in the pressure chamber  104 . The high pressure gas  108  enters the passage  228  and forces the floating piston assembly  220  to move downstream, as illustrated in  FIG. 7 . This happens because the disc  223  prevents the high pressure gas  108  to move past the floating piston assembly  220 . As a result of this movement, the oil  115  in the hydraulic chamber  114  starts to be transferred downstream toward the second chamber  120 , along the isolating valve assembly  240 , though passages  458 , sealing bore  459 , and metering orifice  470 . Note that  FIG. 7  shows the floating piston assembly  220  being midway the setting tool stroke, and the hydraulic chamber  114  getting smaller. At this time the frangible disc  223  is still intact as the pressure applied to it is not enough to break it. For this reason, the floating piston assembly  220  is moving downstream and no high pressure gas  108  from the pressure chamber  104  comingles with the oil  115  in the hydraulic chamber  114 . 
     However, at a location approximately mid-way of the setting tool stroke, the burning power charge  106  will have produced enough gas pressure to fully set and release, in step  604 , from the wellbore tool  150 . The setting tool  200  stroke travel will continue to its design limit and the automatic oil flow shut-off begin to occur in step  606 . 
     As the floating piston assembly  220  continues to move downstream toward the isolation valve assembly  240 , the disc bleed pin  226  contained inside the floating piston body  221 , contacts and pushes against the upstream end of the isolation valve  250 . As the force and movement is increased, the frangible shear screw  448  (see  FIG. 4 ) connecting the sleeve insert  444  to the isolation valve  450  will shear (see parts  448 A and  448 B in  FIG. 8 ), which allows the isolation valve  450  to be pushed downstream inside the sleeve insert  444 . Note that the bleed pin  426  is held pinned inside the retainer nut  225  by two (or more) frangible shear screws  227  (see  FIG. 7 ). This is to ensure that the isolation valve  450  moves downstream while the bleed pin  226  remains fixed in place inside the floating piston assembly  220  at this stage. 
     As the isolation valve  450  is being pushed downstream inside the body  441  as illustrated in  FIG. 8 , the downstream end  454  and sealing o-ring  472  of the valve body  450  enter inside the sealing bore  459  and immediately and automatically stop the oil flow into the second chamber  120  of the lower second cylinder  121  as the most downstream part of the isolation valve  450  is machined to snugly fit inside the sealing bore  459 . However, in one embodiment, it is possible to machine the most downstream part of the valve isolation body to have a smaller outer diameter than the sealing bore  459 , so that oil  115  can still flow past the isolation valve  450  even if the internal gas pressure is being autobleed. At the same time, the two sealing o-rings  455  have moved downstream, uncovering the several perpendicular ports  456  located in the body  441 . The remaining oil  115  being forced downstream by the floating piston assembly  220  is vented to the wellbore through the several perpendicular ports  456 , i.e., outside the setting tool. Downstream movement of the isolation valve  450  ceases when the shoulder  480  of the valve contacts the shoulder  482  of the sleeve insert  444 . This means that the oil located in the second chamber  120  and downstream has not been contaminated by the high pressure gas  108 , while the small amount of oil that has been trapped above the second chamber  120  is being removed from the setting tool through the ports  456 . 
     As the gas pressure in the pressure chamber  104  continues to exert a downstream push force on the floating piston assembly  220 , the downstream end  226 B of the bleed pin  226  is still pushing on the now immovable isolation valve  450  (see  FIG. 8 ), so that enough force is created to shear the two (or more) frangible shear screws  227  linking the bleed pin  226  to the disc retainer  225  (see  FIG. 3 ). Continued downstream movement of the floating piston body  221  allows the trapped frangible disc  223  to be penetrated by the boss  226 A of the bleed pin  226  and the automatic bleed-off of the gas pressure begins in step  608 . In other words, the high pressure gas  108  is now allowed to travel through the floating piston assembly  220  and then partially through the isolation valve assembly  240  and then to exit through the ports  456  outside the housing  410  of the setting tool  200 . The floating piston assembly  220 &#39;s movement downstream ceases when the disc  223  is penetrated and shoulders  230  and  231  (see  FIG. 3 ) contact each other. 
     In this respect,  FIG. 8  illustrates the final positions of the floating piston assembly  220  and the isolation valve assembly  240  when auto-bleeding has occurred.  FIG. 9  illustrates the unblocked gas  108  flow through passage  228  and the passages  229 . Note that the disc  223  is broken in  FIG. 9  as the boss  226 A of the bleed pin  226  has moved past the disc.  FIG. 10  illustrates the unblocked gas  108  flow path through bore  450 A, port  460 , passage  462  inside the auto-bleeding setting tool  200  and out into the wellbore through port  456 . 
     The setting tool  200  discussed in the previous embodiments may be used in a well as now discussed with regard to  FIG. 11 .  FIG. 11  shows a well  1000  that was drilled to a desired depth H relative to the surface  1002 . A casing string  1100  protecting the wellbore  1040  has been installed and cemented in place. To connect the wellbore  1040  to a subterranean formation  1060  to extract the oil and/or gas, various stages of the casing need to be perforated and then fractured. To perforate and then fracture a given stage, a wellbore tool  1120  (for example, a plug) needs to be set up in the well to insulate the downstream stages. 
     The typical process of connecting the casing to the subterranean formation may include the following steps: (1) connecting the plug  1120 , which has a through port  1140  (known as a frac plug), to the setting tool  200 , (2) lowering the setting tool  200  and the plug  1120  into the well, (3) setting up the plug by actuating the setting tool, and (4) perforating a new stage  1170  above the plug  1120 . The step of perforating may be achieved with a gun string  1200  that is lowered into the well with a wireline  1220 . A controller  1240  located at the surface controls the wireline  1220  and also sends various commands along the wireline to actuate one or more gun assemblies of the gun string or the setting tool  200 , which is attached to the most distal gun assembly. 
     A traditional gun string  1200  includes plural carriers  1260  connected to each other by corresponding subs  1280 , as illustrated in  FIG. 11 . Each sub  1280  includes a detonator  1300  and a corresponding switch  1320 . The corresponding switch  1320  is actuated by the detonation of a downstream gun. When this happens, the detonator  1300  becomes connected to the through line, and when a command from the surface actuates the detonator  1300 , the upstream gun is actuated. When the most distal detonator is actuated, the power charge  106  from the setting tool  200  is ignited and the setting tool is actuated, as discussed with regard to  FIG. 6 . The setting tool  200  is engaged to the auxiliary tool  1120  (e.g., a plug in this embodiment) when the detonator is actuated. After the setting tool has been activated, and the pressurized gas has set up the plug  1120 , the pressurized gas from the setting tool is bled into the well, as discussed above with regard to the embodiments illustrated in  FIGS. 2-10 . After this or at the same time the setting tool  200  is retrieved from the plug  1120  as illustrated in  FIG. 11 , the operator of the gun string can start the fracturing process. Note that at this time, the oil in the setting tool has been insulated from the gas generated by the power charge, and the pressure accumulated in the pressure chamber has been vented out to the exterior of the setting tool. Thus, when the setting tool is brought to the surface, it is already vented and there is no gas under pressure that needs to be removed. Also to reset the setting tool it is much easier than before because the gas and oil did not comingle, and the oil  115  from the second chamber  120  can be reused as it has not been contaminated by the gas  108 . 
     The setting tool discussed above may be manufactured to have the configuration illustrated in the previous figures. However, one skilled in the art would understand that the novel features shown in the above figures may also be implemented retroactively into the existing setting tools. Thus, in one embodiment, the floating piston of a traditional setting tool may be replaced with the floating piston assembly  220  shown in  FIG. 3 . Further, a traditional setting tool may be modified to receive the isolation valve assembly  240 , which is shown in  FIG. 4 . Also note that the novel setting tool  200  shown in  FIG. 2  may still include the release valve  140  provided at the pressure chamber  104 , similar to the traditional setting tool  100  shown in  FIG. 1 . However, one skilled in the art would understand that the release valve  140  may be removed in the setting tool  200 . 
     A method for shutting-off the oil flow and bleeding off the gas in a setting tool, as illustrated above, is now discussed with regard to  FIG. 12 . The method includes a step  1200  of lowering a setting tool  200  into a well, a step  1202  of activating the setting tool  200  so that a pressured gas  108  is generated in the setting tool  200 , and the pressured gas  108  acts on a frangible disc  223  that seals a bore of a floating piston assembly  220 , to prevent the pressured gas  108  to move past the floating piston assembly  220 , a step  1204  of translating an isolation valve assembly  240  located in a housing  210  of the setting tool  200  to shut off a flow of oil, a step  1206  of opening a side port  456  formed in the housing  210 , and a step  1208  of breaking the frangible disc of the floating piston assembly  220  to expel the pressured gas  108  outside the housing, through the side port  456 . 
     The method may further include a step of translating the floating piston assembly along the housing under pressure from the pressured gas, to force a hydraulic liquid, which is stored between the floating piston assembly and the isolation valve assembly, to move past the isolation valve assembly, and/or a step of contacting the floating piston assembly with the isolation valve assembly, a step of pushing a moveable isolation valve of the floating piston assembly relative to a sleeve insert of the isolation valve assembly, to shut off the flow of the hydraulic liquid past the isolation valve assembly, and/or a step of further pushing the moveable isolation valve with the floating piston assembly so that a bleed pin of the floating piston assembly breaks from a connection with a body of the floating piston assembly and breaks the frangible disc to release the pressured gas outside the setting tool. 
     The disclosed embodiments provide methods and systems for automatically bleeding off a pressurized gas from a setting tool while located in a well and also shutting off a valve for preventing the pressurized gas to commingle with the oil used to actuated the setting tool. It should be understood that this description is not intended to limit the invention. On the contrary, the exemplary embodiments are intended to cover alternatives, modifications and equivalents, which are included in the spirit and scope of the invention as defined by the appended claims. Further, in the detailed description of the exemplary embodiments, numerous specific details are set forth in order to provide a comprehensive understanding of the claimed invention. However, one skilled in the art would understand that various embodiments may be practiced without such specific details. 
     Although the features and elements of the present exemplary embodiments are described in the embodiments in particular combinations, each feature or element can be used alone without the other features and elements of the embodiments or in various combinations with or without other features and elements disclosed herein. 
     This written description uses examples of the subject matter disclosed to enable any person skilled in the art to practice the same, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the subject matter is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims.