MX2011006793A

MX2011006793A - Setting tool for expandable liner hanger and associated methods.

Info

Publication number: MX2011006793A
Application number: MX2011006793A
Authority: MX
Inventors: Brock W Watson; Daniel K Moeller
Original assignee: Halliburton Energy Serv Inc
Priority date: 2008-12-23
Filing date: 2009-12-15
Publication date: 2011-07-20
Also published as: WO2010075062A1; EP2368014A1; SG172341A1; BRPI0918388A2; US20100155084A1; CN102482932A; CA2747436A1; AU2009330353A1

Abstract

A method of conveying an expandable liner hanger (18) in a well includes: conveying the hanger (18) into the well on a work string (22) with a setting tool (20) releasably secured to the hanger by an anchoring device (28); applying left-hand rotation to the work string (22); then lowering the work string, thereby releasing the anchoring device (28) and permitting the setting tool (20) to be retrieved from within the hanger. A method of setting a liner hanger (18) includes: forcing an expansion cone (66) through a hanger portion, thereby expanding the portion; and forcing another expansion cone (72) into another hanger portion, thereby expanding that portion. A method of setting an expandable liner hanger includes: lowering a liner (16) into the well; then connecting the hanger (18) and a setting tool lower section to the liner; then lowering the hanger (18) and the lower section into the well; and then connecting a setting tool upper section to the lower section.

Description

INSERTION TOOL FOR THE PIPE HOLDER AUXILIARY OF EXPANDABLE COATING AND ASSOCIATED METHODS TECHNICAL FIELD OF THE INVENTION The present invention relates generally to the equipment used and the operations performed in conjunction with an underground well and, in a manner described herein, particularly provides an insertion tool for a fastener of the auxiliary casing of expandable casing and associated methods .

BACKGROUND OF THE INVENTION The fasteners of the expandable auxiliary casing pipe are generally used to secure an auxiliary casing pipe within a casing or an auxiliary casing string previously inserted. These types of fasteners of the auxiliary casing pipe are typically inserted by expanding the fasteners of the casing auxiliary pipe radially outwardly in tight contact and sealed with the casing or the auxiliary casing string from the previous casing. Many of these fasteners in the auxiliary casing pipe are expanded using hydraulic pressure to leading to an expanding cone or wedge through the clamp of the auxiliary casing pipe, but other methods (such as mechanical straightening, explosive expansion, metal expansion with me, expansion with inflatable material, expansion powered by electromagnetic force, etc.).

The expansion process is typically executed by an insertion tool used to transport the fastener of the auxiliary casing pipe into a hole. The insertion tool is interconnected between a working string (for example, a tubular string, consisting of drill pipe or other continuous or segmented tubular elements) and the clamp of the auxiliary casing pipe.

If the clamp of the auxiliary cladding pipe is expanded using the hydraulic pressure, then the insertion tool is generally used to control the communication of the fluid pressure, and the flow to and from various parts of the clamp expansion mechanism of the clamp. auxiliary coating pipe, and between the working string and the auxiliary coating pipe. The insertion tool can also be used to control when and how the work string is released from the fastener of the auxiliary casing pipe, for example, after the expansion of the fastener of the auxiliary coating pipe, in emergency situations, or after a failed insertion of the fastener of the auxiliary coating pipe.

It is desired to minimize a thickness of the wall of the insertion tool and the fastener assembly of the auxiliary coating pipe, so that the equivalent circulating density (ECD) is reduced, and so that the assembly can be quickly transported inwardly. from the well.

Accordingly, it will be appreciated that improvements are needed in the art of the insert tools of the expandable auxiliary casing fasteners and the associated methods for installing expandable casing fasteners. These improvements may include improvements to reduce the ECD during operation in a trial period, to increase operational efficiency, the convenience of assembly and operation, improved functionality, etc., discussed or not discussed previously.

SUMMARY OF THE INVENTION In the practice of the principles of the present invention, a tool of insertion and the associated methods which solve at least one problem in the art. An example is described below in which the insertion tool uses multiple expansion cones to expand different parts of the fastener of the auxiliary coating pipe. Another example is described below in which the insertion tool is provided in multiple sections which are assembled while inserting the clamp of the auxiliary casing and the insertion tool into the well.

In one aspect, a method is provided for transporting a fastener of the expandable casing auxiliary tubing in an underground well. The method includes the steps of: transporting the fastener of the auxiliary casing pipe into the well in a work string with an insertion tool releasably secured to the fastener of the casing auxiliary pipe by an anchoring device; apply rotation towards the left hand to the work string; and then lowering the work string, thereby releasing the anchoring device and allowing the insertion tool to recover from the inside of the clamp of the auxiliary casing pipe.

In another aspect, a method for inserting a fastener of the auxiliary casing of an expandable casing in an underground pit which includes the steps of: forcing an expansion cone through a fastener part of the casing auxiliary pipe, thereby expanding the fastener part of the pipe auxiliary coating radially outward; and forcing another expansion cone to another part of the fastener of the auxiliary casing pipe, thereby expanding the second fastener part of the casing auxiliary pipe radially outwardly.

In yet another aspect, there is provided a method for inserting a fastener of the auxiliary casing of an expandable casing into an underground well which includes the steps of: lowering an auxiliary casing pipe into a well, then connecting the fastener of the pipe auxiliary coating and a lower section of an insertion tool to the auxiliary coating pipe; then lower the clamp of the auxiliary casing and the lower section into the well; and then connect a top section of the insertion tool to the lower section.

In a further aspect, a method is provided for inserting a fastener of the expandable auxiliary casing pipe into an underground pit which includes the stages of: applying a pressure differential between an internal flow conduit of an insertion tool and an annular space formed between the insertion tool and a hole, the pressure differential causing the insertion tool to begin to expand the fastener of the pipe auxiliary coating; and applying a pressing force to a bypass closure as a result of the pressure differential acting on a piston surface of the bypass closure, thereby causing the bypass seal to move and provide fluid communication between the bypass conduit. flow and annular space.

These and other features, advantages, benefits and objects of the present invention will be apparent to one of ordinary skill in the art under careful consideration of the detailed description of the representative embodiments of the invention below and the accompanying figures, in which the elements similar are indicated in the different figures using the same reference numbers.

BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a schematic view partly in cross section of a fastener insertion system of the auxiliary casing and methods associates that practice the principles of the present invention; FIGS. 2A-G are cross-sectional views of successive axial sections of a fastener insertion tool of the auxiliary casing and an expandable casing auxiliary fastener that can be used in the system and method of FIG. 1, the insertion tool and the fastener of the auxiliary casing pipe are illustrated in a test configuration; FIGS. 3A and B are cross-sectional views of parts of the insertion tool after a working string applies a compressive force and torque to the insertion tool in a release procedure; FIGS. 4A-H are cross-sectional views of the insertion tool at the end of the expansion procedure of the fastener of the auxiliary coating pipe; FIGS. 5A-C are cross-sectional views of the steps in an assembly procedure of the axial sections of the insertion tool during installation; FIG. 6 is a cross-sectional view of a clamping arrangement used to secure the parts of the insertion tool in relation to the other parts during the assembly procedure; Y FIGS. 7A and B are cross-sectional views of a shunt configuration that can be used in the insertion tool, the shunt is closed in FIG. 7A, and the derivation is open in FIG. 7B.

DETAILED DESCRIPTION OF THE INVENTION It should be understood that the different embodiments of the present invention described herein may be used in different orientations, such as inclined, inverted, horizontal, vertical, etc., and in different configurations, without departing from the principles of the present invention. The modalities are merely described as examples of useful applications of the principles of the invention, which is not limited to any of the specific details of these modalities.

In the following description of the representative embodiments of the invention, directional terms, such as "above", "below", "superior", "inferior", etc., are used for convenience with reference to the accompanying figures. In general, "above", "superior", "up" and similar terms refer to an address towards the surface of the earth along a hole, and "below," "below," "down," and similar terms refer to a direction that moves away from the surface of the earth along the hole.

A system for inserting a fastener of the auxiliary coating pipe 10 and an associated method are representatively illustrated in FIG. 1 which carry out the principles of the present invention. In this system 10, a coating string 12 is installed and cemented into a hole 14. It is now desired to install an auxiliary coating pipe 16 extending outwardly from a lower end of the coating string 12, for the purpose of of coating even more to hole 14 at greater depths.

It should be noted that, in this description, the terms "Auxiliary casing" and "casing" are used interchangeably to describe the tubular materials that are used to form protective liners in pits. Auxiliary coating lines and casing pipes may be made of any material (such as metals, plastics, composites, etc.), may be expanded or non-expanded as part of an installation process, and may be segmented or continuous. It is not necessary to cement in a hole an auxiliary casing or casing pipe. Any type of auxiliary coating pipe or casing can be used in accordance with the principles of the present invention.

As shown in FIG. 1, a fastener of the expandable cover auxiliary pipe 18 is used to seal and secure an upper end of the auxiliary facing pipe 16 near a lower end of the cover string 12. Alternatively, the fastener of the auxiliary facing pipe 18 could be used to seal and secure the upper end of the auxiliary casing pipe 16 over a window (not shown in FIG.1) formed through a sidewall of the casing string 12, with the auxiliary casing lining extending out through the window into a bifurcation or lateral hole. Accordingly, it will be appreciated that many different configurations and relative positions of the coating string 12 and the auxiliary coating pipe 16 are possible in accordance with the principles of the invention.

An insertion tool 20 is connected between the fastener of the auxiliary coating pipe 18 and a work st 22. The work st 22 is used to transport the insertion tool 20, the fastener the auxiliary coating pipe 18 and the auxiliary coating pipe 16 into the hole 14, driving the fluid pressure and flow, transmitting torque, tensile and compressive force, etc. The insertion tool 20 is used to facilitate the transportation and installation of the auxiliary coating pipe 16 and the fastener of the auxiliary coating pipe 18, in part using the torque, the tensile and compressive forces, the fluid pressure and flow, etc. delivered by the work st 22.

At this point, it should be specifically understood that the piples of the invention are not limited in any way to the details of the system 10 and the associated methods described herein. On the other hand, it should be clearly understood that the system 10, the methods, and the particular elements thereof (such as the insertion tool 20, the fastener of the auxiliary coating pipe 18, the auxiliary coating pipe 16, etc.) are only examples of a wide variety of configurations, alternatives, etc. which can incorporate the piples of the invention.

Refer now also to FIGS. 2A-G, cross-sectional detailed views of successive axial portions of the clamp of the auxiliary casing pipe 18 and the tool are representatively illustrated. of insert 20. FIGS. 2A-G represent a specific configuration of a fastener embodiment of the auxiliary coating pipe 18 and the insertion tool 20, but many other configurations and embodiments are possible without departing from the piples of the present invention.

The clamp of the auxiliary coating pipe 18 and the insertion tool 20 are shown in FIGS. 2A-G in the configuration in which they are transported into the hole 14. The working st 22 is attached to the insertion tool 20 in a threaded upper connection 24, and the auxiliary coating pipe 16 is attached to the fastener of the auxiliary coating pipe 18 in a lower threaded connection 26 when the complete assembly is transported into the hole 14.

The insertion tool 20 is releasably secured to the fastener of the auxiliary coating pipe 18 by means of an ancho device 28 (see FIG 2G) including the collars 30 coupled with profiles or cavities 32 formed in an outer casing 34 of the fastener of the auxiliary casing pipe. When operatively coupled with the cavities 32 and supported externally by a support sleeve 36, the collars 30 allow the transmission of torque and force axial between the insertion tool 20 and the fastener of the auxiliary coating pipe 18.

The ancho device 28 can be conveniently released at the end of the insertion operation as will be fully described below. Briefly, the working st 22 can be lowered after the fixing operation to thereby cause the support sleeve to move downward, so that the support sleeve stops supporting the collars 30 externally, allowing the tool of insert 20 is recovered from within the fastener of the auxiliary coating pipe 18.

In addition, the ancho device 28 can be released, even if the insertion tool 20 did not satisfactorily insert the fastener of the auxiliary coating pipe 18, rotating the working st 22 to the left (in the counterclockwise direction). when observed from the surface) and then moving down the work st.

The work st 22 is connected to a generally tubular inner mandrel assembly 44 through which the flow conduit 40 extends. The threaded connection 24 (between the work st 22 and the insertion tool 20) is at one end top of the mandrel assembly interior 44 (see FIG 2A).

The support sleeve 36 is part of the inner mandrel assembly 44, which prevents downward displacement relative to the assembly of the outer case 48 through detents or coupling members 38. However, if a downward force is applied to the a release sleeve 84 sufficient to cause the securing screws 46 to cut, the release sleeve is allowed to move downwards, releasing the members 38 from their engagement with the inner mandrel assembly 44, and the inner mandrel assembly (including the support sleeve 36) will move downwards, thus not supporting the collars 30 and allowing them to disengage from the cavities 32.

In FIGS. 3A and B, the parts of the insertion tool 20 are representatively illustrated after the inner mandrel 44 has moved downwardly relative to the assembly of the outer case 48. In FIG. 3A the securing screws 46 can be observed, together with the release sleeve 84 displaced downward, the decoupling of the members 38 from the inner mandrel assembly 44, and the manner in which the inner mandrel assembly is displaced downwardly. .

To apply the force directed downward to the sleeve of release 84, the work string 22 is used to rotate an upper connector housing 86 counterclockwise, and then move the connector housing downward. The inner lugs 88 formed in the connector housing 86 are coupled with a ratchet or J-groove profile 90 formed externally in the inner mandrel assembly 44.

Typically, the coupling between the lugs 88 and the J-groove profile 90 prevents downward displacement of the connector housing 86 relative to the inner mandrel assembly 44, but if the connector housing is first rotated in the opposite direction to the The clockwise so that the handles 88 enter an elongated portion of the J-slot profile 90, then the connector housing can be moved downward relative to the inner mandrel assembly. The connector housing 86 can then contact and apply a downward directed force to the release sleeve 84, thereby severing the securing screws 46, releasing the members 38, and allowing the inner mandrel assembly 44 to move downwardly in relationship with the assembly of the outer casing 48 as discussed above.

In FIG. 3B it can be seen that the collars 30 are no longer supported externally by the support sleeve 36.

The collars 30 can now be released from the cavities 32 by raising the inner mandrel assembly 44 (ie, by picking it up on the work string 22). The locking detents 50 prevent the support sleeve 36 from again supporting the collars 30 when the inner mandrel assembly 44 is raised.

It should be noted that the insertion tool 20 can be released from the fastener of the auxiliary coating pipe 18 at any time. For example, the anchoring device 28 could typically be released after the fastener of the auxiliary casing pipe is inserted into the casing string 12 (i.e., lowering the work string 22 to move down the support sleeve 36). , and then raising the working string to remove the insertion tool 20 from the fastener of the auxiliary coating pipe), or the anchoring device can be released as a contingency procedure in the event that the auxiliary coating pipe 16 is left stuck in the 14th hole (ie rotate the work string counterclockwise), then lower the work string to release the members 38 and move the support sleeve down, and then raise the string of work to remove the insertion tool 20 from the fastener of the pipe auxiliary coating).

Returning to FIGS. 2A-G, the insertion tool 20 is actuated to insert the fastener of the auxiliary coating pipe 18 by dropping or circulating a ball or other type of plug (not shown) in the flow conduit 40, so that the plug is coupled with the seal surface 92 (see FIG 2F) formed in the inner mandrel assembly 44. An elevated pressure is applied to the flow conduit 40 (via the inside of the work string 22) on top of the cap in this way increasing a pressure differential from the flow conduit to an exterior of the insertion tool 20. The exterior of the insertion tool 20 corresponds to an annular space 52 between the hole 14 (or the interior of the string of liner 12) and the working string 22, the insertion tool 20, the clamp of the auxiliary lining pipe 18 and the auxiliary lining pipe 16.

The high pressure differential is applied through three pistons 60 interconnected in the outer casing assembly 48 (see FIGS 2C and D). An upper side of each piston 60 is exposed to the pressure in the flow conduit 40 by means of the ports 62 in the inner mandrel 44, and a lower side of each piston is exposed to the pressure in the annular space 52 by means of 64 ports in the assembly of the outer casing 48.

A discharge device 70 is provided to discharge the flow conduit 40 into the annular space 52 if a pressure differential through the discharge device reaches a predetermined limit. The discharge device 70 is representatively illustrated in the figures as a rupture disk, but other types of discharge devices, pressure relief devices, etc. they can be used, if desired.

An expansion cone 66 is positioned at the lower end of the outer housing assembly 48. The expansion cone 66 is shown as a two-part element having a frustoconical surface 68 formed thereon which is led through the interior of the clamp of the auxiliary coating pipe 18 to externally expand the fastener of the auxiliary coating pipe. The term "expansion cone" as used herein is intended to encompass equivalent structures which may be known to those skilled in the art as wedges or straighteners, whether or not those structures include conical surfaces.

It should be noted that only a small upper portion of the fastener of the auxiliary casing pipe 18 overlaps the expansion cone 66. This configuration reduces advantageously the required outside diameter of the insertion tool 20 and the fastener assembly of the auxiliary coating pipe 18, thereby reducing the equivalent circulating density while there is circulation through the assembly, and allowing the assembly to be transported further. quickly into the well.

The pressure differential across the pistons 60 causes each of the pistons to exert downward pressure force on the expansion cone 66 via the remainder of the outer housing assembly 48. These combined pressure forces lead to the cone of expansion downwardly through the interior of the fastener of the auxiliary coating pipe 18, thereby expanding the fastener of the auxiliary coating pipe.

Although three of the pistons 60 are illustrated in the figures and described above, any larger or smaller number of pistons can be used. If a greater pressing force is needed for a particular configuration of the fastener of the auxiliary coating pipe / insertion tool, then more pistons 60 can be provided. A greater pressing force can also be obtained by increasing the piston surface of each one. of the pistons 60.

The insertion tool 20 and the fastener of the Liner auxiliary tubing 18 are representatively illustrated in FIGS. 4A-H after the clamp of the auxiliary casing pipe has expanded. It should be noted that the expansion cone 66 has moved downwardly through the clamp of the auxiliary casing pipe 18 to thereby expand the clamp of the casing auxiliary pipe radially outwardly.

In another important feature of the insertion tool 20, another expansion cone 72 is provided on an exterior of the assembly of the outer casing 48. This additional expansion cone 72 engages with an upper end 76 of the fastener of the auxiliary casing pipe. 18 at the end of the insertion process, in order to provide a smooth, elongated entry for subsequent access to the interior of the auxiliary coating pipe 16 after the insertion tool 20 is recovered. Once expanded by the cone 72, the upper end 76 of the fastener of the auxiliary coating pipe 18 has an inner diameter D greater than the inner diameter d of the fastener of the auxiliary coating pipe expanding by the lower expansion cone 66.

It should be noted that, when the housing assembly outer 48 has moved down a predetermined distance relative to the inner mandrel assembly 44, a bypass closure 94 will be contacted and moved downward by the outer housing assembly to thereby open the ports 74 and provide communication from fluids between the outside of the insertion tool 20 and an internal chamber 78 exposed to a bottom side of one of the pistons 60 (see FIGS.4E, 7A and 7B). Because the chamber 78 is also in communication with the ports 64 below the piston 60, this functions to equalize the pressure between the flow conduit 40 and the annular space 52 (or at least it provides a remarkable pressure drop at the surface to indicate that the insertion operation was satisfactorily completed).

An alternative way to displace the branch closure 94 downwardly is to sufficiently increase the pressure in the conduit 40 on the cap to cut one or more security screws 96. The branch closure 94 has an internal differential pressure area formed therein. which causes the sleeve to be pressed downward by the pressure differential from the conduit 40 into the annular space 52. Preferably, the security screw 96 is configured such that the pressure differential required to cut the security screw is greater than that required to displace the expansion cone 66 and sufficiently expand the fastener of the auxiliary coating pipe 18, but is less than the pressure differential required to open the discharge device 70.

The bypass closure 94, therefore, will move downwardly after the security screw 96 is cut, thus opening the ports 74. A pressure ring 98 will prevent the sleeve 94 from moving upwards to close the ports 74. In FIG. 7A, the branch closure 94 is shown before the security screw 96 was cut, and in FIG. 7B the bypass closure is represented after it moves down to open ports 74.

It should be noted that, if during a normal insertion operation, the assembly of the outer casing 48 moves down sufficiently far relative to the inner mandrel assembly 44, so that the assembly of the outer casing contacts and presses the closure of the casing. 94 downward, it is merely necessary to cut the security screw 96. Once the security screw 96 is cut, the pressure differential across the surface of the piston in the sleeve 94 will cause the sleeve to move downwards still more to open the port 74. In this way, the sleeve 94 opens a path of relatively large flow, and does so relatively quickly, thereby minimizing any erosive effect caused when the pressure in the flow conduit 40 equals the pressure in the annular space 52.

With the clamp of the auxiliary coating pipe 18 expanded as depicted in FIGS. 4A-H, the external seals 206 on the fastener of the auxiliary casing pipe 18 could now be sealedly and tightly coupled with the interior of the casing string 12 in the system of FIG. 1. The inner mandrel assembly 44 can now be moved downward (ie, by loosening the work string 22) to release the anchoring device 28 as described above. The insertion tool 20 can then be recovered from the well.

The insertion tool 20 is quite long when assembled, so, for purposes of handling, storage, convenient transportation, etc., the insertion tool includes features that allow it to be assembled when the auxiliary casing 16 is installed, the fastener of the auxiliary coating pipe 18 and the insertion tool within the hole 14. In particular, the separate sections of the outer housing assembly 48 and the inner mandrel assembly 44 can be connected together when the insertion tool 20 is installed.

In FIG. 5A it can be seen that the lower section 44a of the lower mandrel assembly and the lower section 48a of the outer housing assembly have been connected to the clamp of the auxiliary cladding pipe 18 in the upper part of the auxiliary cladding pipe 16. fastener of the auxiliary coating pipe 18 and the auxiliary coating pipe 16 are not visible in FIG. 5A, but it will be appreciated that they connect to the lower section of the insertion tool 20 as described above (e.g., with the collars 30 engaged in the cavities 32 and the expansion cone 66 received within the upper end of the fastener the auxiliary coating pipe).

The auxiliary casing pipe 16 and the clamp of the auxiliary casing pipe 18 have been lowered into the well, and the wedges 54 of a drill tower (not shown) now support the casing auxiliary pipe, the fastener of the pipe auxiliary coating, and the lower section of the insertion tool 20. A spacer block 56 supports a coupling 82 of the outer housing assembly 48a. This prevents the inner mandrel assembly 44a from moving downwardly relative to the outer housing assembly 48a, which could otherwise operate to release the device from anchoring 28. A lifting coupling 100 is temporarily connected to an upper end of the coupling 80a for use in raising the lower section of the insertion tool 20 and the fastener of the auxiliary coating pipe 18, so that they can be connecting to the auxiliary casing pipe 16 when it is suspended in the wedges 54.

Referring now also to FIG. 5B, it can be seen that the lifting coupling 100 has been removed, and an upper section 44b of the inner mandrel assembly and an upper section 48b of the outer housing assembly are now positioned to be connected to the lower section 44a of the mandrel assembly interior and the lower section of the outer shell assembly 48a. To connect these assemblies 44a, b and 48a, b, an upper coupling 80b in the inner mandrel assembly 44b is threaded onto the lower coupling 80a (at which time the inner mandrel assembly 44 is complete and can support the lower sections), then the spacer block 56 is removed, and an outer sleeve 102 is moved downward to connect with the sections of the outer casing.

Referring now also to FIG. 5C, the insertion tool 20 is illustrated after the lower and upper sections 44a, b of the mandrel assembly The interior and the lower and upper sections 48a, b of the outer housing assembly have been connected together, and the insertion tool is ready to be lowered into the hole. It should be noted that the coupling 80a, b joins the serrated ends of the lower and upper sections 44a, b of the inner mandrel assembly to thereby allow the torque to be transmitted through the inner mandrel assembly. It should further be noted that the outer sleeve 102 is secured to the upper section 48b of the outer housing with a threaded connection 104 and abuts a shoulder 106 in the coupling 82, so that the compressive force can be transmitted from the upper section of the outer shell assembly towards the lower section during the insertion process.

Referring now also to FIG. 6, a clamp 108 is used to secure the assembly of the outer casing 48 relative to the inner mandrel assembly 44 during the connection process shown in FIGS. 5B and C. The bracket 108 supports the upper section 48b of the outer housing assembly until it is connected to the lower section 48a of the outer housing assembly by the outer sleeve 102. After the two sections of the outer housing are connected to each other. assembly of the outer casing 48, the clamp 108 is removed, so as to allow the relative displacement between the outer casing assembly and the inner mandrel assembly 44, for example, during the insertion process or when the anchoring device 28 is released.

Providing the insertion tool 20 in multiple sections which can be assembled easily, quickly and conveniently when installing the insertion tool, the fastener of the auxiliary coating pipe 18 and the auxiliary coating pipe 16, the storage and the transportation of the insertion tool becomes more practical and economical. For example, separate sections of the insertion tool 20 can be more easily accommodated on trucks, boats or other standard shipping means, can be more easily lifted on an offshore derrick, can be more easily stored, can be assembled more easily, etc.

It can now be fully appreciated that the system 10, the insertion tool and the associated methods described above provide significant advances in the art of inserting fasteners of the expandable auxiliary casing. These advances include, but are not limited to, the use of the additional expansion cone 72 to elongate the upper end 76 of the pipe fastener. auxiliary coating 18, providing contingency release where a rotation in the counter-clockwise direction of the work string 22 followed by lowering the working string works to release the anchoring device 28, the bypass closure 94 which opens a large area of the flow rapidly, and the assembly of the upper and lower sections of the insertion tool as it is installed in the well.

The above description, in particular, provides a method for inserting a fastener of the auxiliary casing of expandable casing 18 into an underground well, with the method including the steps of: lowering an auxiliary casing pipe 16 into the well; then connecting the clamp of the auxiliary casing pipe 18 and a lower section 44a, 48a of the insertion tool 20 to the auxiliary casing pipe 16; then lowering the clamp of the auxiliary casing pipe 18 and the lower section 44a, 48a into the well; and then connecting an upper section 44b, 48b of the insertion tool 20 to the lower section 44a, 48a.

The step of connecting the upper section of the insertion tool 20 to the lower section of the insertion tool 20 may include connecting an upper section 48b of an assembly of the outer casing 48. to a lower section 48a of the assembly of the outer casing 48.

The step of connecting the upper section of the insertion tool 20 to the lower section of the insertion tool 20 may further include the step of connecting an upper section 44b of an inner mandrel assembly 44 to a lower section 44a of the mandrel assembly. interior 44 prior to the step of connecting the upper section 48b of the assembly of the outer casing 48 to the lower section 48a of the assembly of the outer casing 48.

The method can include the step of securing, so that it can be released, the upper section 48b of the assembly of the outer casing 48 to the upper section 44b of the inner mandrel assembly 44 before the step of connecting the upper section 48b of the assembly from the outer casing 48 to the lower section 48a of the assembly of the outer casing 48.

The method may further include the step of moving the outer casing assembly 48 relative to the inner mandrel assembly 44 to thereby expand the fastener of the casing auxiliary pipe 18.

The above description further provides a method for inserting a fastener of the expandable casing auxiliary pipe 18 into an underground well, with the method including the steps of: forcing a first expansion cone 66 through a first part of the fastener of the auxiliary coating pipe 18 (e.g., on seals 206), thereby expanding the first part radially outwardly; and forcing a second expansion cone 72 toward a second fastener portion of the auxiliary coating pipe 18 (eg, at the upper end 76), thereby expanding the second part radially outwardly.

The second part may be one end 76 of the fastener of the auxiliary casing pipe 18. The first and second expansion cones 66, 72 may be longitudinally spaced apart along an insertion tool 20 received in the fastener of the auxiliary pipe of coating 18.

The first step of forcing the first expansion cone 66 may include expanding the first part of the fastener of the auxiliary pipe 18 to a first internal dimension d, the second step of forcing the second expansion cone 72 may include expanding the second part of the fastener from the auxiliary pipe 18 to a second external dimension D, and the second internal dimension D may be greater than the first internal dimension d. The second internal dimension D can be formed by the second expansion cone 72 at one end 76 of the clamp of the auxiliary coating pipe 18.

The above description further discloses a method for inserting an expandable cover auxiliary pipe fastener 18 into an underground well, with the method including the steps of: applying a pressure differential between an interior flow conduit 40 of an insertion tool 20 and an annular space 52 formed between the insertion tool 20 and a hole 14, the pressure differential causing the insertion tool 20 to begin to expand the fastener of the auxiliary coating pipe 18; and applying a pressing force to a branch closure 94 as a result of the pressure differential acting on a piston surface of the branch closure 94, thereby causing the bypass closure to move and provide fluid communication between the conduit of flow 40 and annular space 52.

The step of applying the pressing force may include moving the outer housing assembly 48 relative to an inner mandrel assembly 44 of the insertion tool 20, thereby causing the assembly of the outer housing 48 to contact the closure of derivation 94.

The step of applying the pressing force may include increasing the pressing force to a predetermined level so as to cut a safety member 96.

The above description further discloses a method for conveying an expandable cover auxiliary pipe fastener 18 in an underground well, with the method including the steps of: transporting the fastener of the auxiliary facing pipe 18 into the well in a working string 22 with an insertion tool 20 sed, so that it can be released, to the fastener of the auxiliary coating pipe 18 by an anchoring device 28; apply rotation to the left hand to the work string 22; and then lowering the work string 22, thereby releasing the anchoring device 28 and allowing the insertion tool 20 to recover from the inside of the clamp of the auxiliary casing pipe 18.

The anchoring device 28 can ensure an inner mandrel assembly 44 of the insertion tool 20 in relation to the clamp of the auxiliary casing pipe 18. The step of applying rotation to the left hand can include rotation of the working string 22 in relation to the inner mandrel assembly 44.

The step of rotating the work string 22 in relation to the inner mandrel assembly 44 may include moving a handle 88 in a J 90 slot.

The step of lowering the work string 22 may include releasing a coupling member 38 that previously prevents displacement of the inner mandrel assembly 44 relative to the assembly of the outer housing 48.

Of course, a person skilled in the art could, under careful consideration of the above description of the representative embodiments of the invention, easily appreciate that many modifications, additions, substitutions, deletions, and other changes can be made to these specific embodiments, and such changes are within the scope of the principles of the present invention. Accordingly, it should be clearly understood that the foregoing detailed description has been given only by way of illustration and example, the spirit and scope of the present invention being limited only by the appended claims and their equivalents.

Claims

NOVELTY OF THE INVENTION Having described the present invention as above, it is considered as a novelty and, therefore, the content of the following is claimed as property: CLAIMS

1. A method for inserting a fastener of the auxiliary casing of expandable casing into an underground well, the method comprises the steps of: lowering an auxiliary coating pipe into the well; then connect the clamp of the auxiliary casing pipe and a lower section of an insertion tool to the casing auxiliary pipe; then lower the clamp of the auxiliary casing and the lower section into the well; and then connect a top section of the insertion tool to the lower section.

2. The method of claim 1, wherein the step of connecting the upper section of the insertion tool to the lower section of the insertion tool further comprises connecting an upper section of an assembly of the outer casing to the lower section of the insert assembly. the outer shell.

3. The method of claim 2, wherein the step of connecting the upper section of the insertion tool to the lower section of the insertion tool further comprises the step of connecting an upper section of an inner mandrel assembly to a lower section of the inner mandrel assembly before the step of connecting the upper section of the outer housing assembly to the lower section of the outer housing assembly.

4. The method of claim 3, further comprising the step of releasably securing the upper section of the outer casing assembly to the upper section of the inner mandrel assembly prior to the step of connecting the upper section of the casing assembly. assembly of the outer casing to the lower section of the outer casing assembly.

5. The method of claim 3, further comprising the step of moving the outer casing assembly relative to the inner mandrel assembly to thereby expand the fastener of the casing auxiliary pipe.

6. A method for inserting a fastener of the auxiliary casing pipe into an underground well, the method comprises the steps of: forcing a first expansion cone through a first part of the fastener of the auxiliary coating pipe, thereby expanding the first part radially outwardly; Y forcing a second expansion cone into a second part of the fastener of the auxiliary coating pipe, thereby expanding the second part radially outwardly.

7. The method of claim 6, wherein the second part is one end of the fastener of the auxiliary coating pipe.

8. The method of claim 6, wherein the first and second expansion cones are longitudinally separated along an insertion tool received in the fastener of the auxiliary casing pipe.

9. The method of claim 6, wherein the step of forcing the first expansion cone further comprises expanding the first fastener part of the auxiliary coating pipe to a first internal dimension, wherein the step of forcing the second expansion cone comprises expanding the second part of the clamp of the auxiliary casing pipe to a second internal dimension, and wherein the second internal dimension is greater than the first internal dimension.

10. The method of claim 9, wherein the second internal dimension is formed by the second expansion cone at one end of the fastener of the auxiliary coating pipe.

11. A method for inserting a fastener of the auxiliary casing pipe into an underground well, the method comprises the steps of: applying a pressure differential between an internal flow conduit of an insertion tool and an annular space formed between the insertion tool and a hole, the pressure differential causing the insertion tool to begin to expand the fastener of the auxiliary pipe of coating; Y applying a pressing force to a bypass closure as a result of the pressure differential acting on a piston surface of the bypass closure, thereby causing the bypass seal to move and provide fluid communication between the flow conduit and the annular space.

12. The method of claim 11, wherein the step of applying the pressing force further comprises displacing an assembly of the outer casing relative to an inner mandrel assembly of the insertion tool, thereby causing the assembly of the outer casing contact with the bypass closure.

13. The method of claim 11, wherein the step of applying the pressing force further comprises increasing the pressing force to a predetermined level in order to thereby sever a safety member.

14. A method for transporting a fastener from the auxiliary casing of an expandable casing in an underground well, the method comprises the steps of: transporting the fastener of the auxiliary casing pipe into the well in a work string with an insertion tool secured so that it can be released to the fastener of the casing auxiliary pipe by an anchoring device; apply rotation towards the left hand to the work string; Y then lower the work string, thereby releasing the anchoring device and allowing the insertion tool to recover from the inside of the clamp of the auxiliary casing pipe.

15. The method of claim 14, wherein the anchoring device ensures an inner mandrel assembly of the insertion tool in relation to the fastener of the auxiliary casing pipe, and wherein the step of applying rotation to the left hand comprises also rotate the work string in relation to the inner mandrel assembly.

16. The method of claim 15, wherein the step of rotating the working string relative to the inner mandrel assembly further comprises displacing a handle in a J-groove.

17. The method of claim 15, wherein the step of lowering the working string further comprises releasing a coupling member which previously prevents displacement of the inner mandrel assembly relative to the assembly of the outer casing.