Expansion pipe reinforcing tool for one-trip expansion and salvage of tubular column

Abstract

The utility model belongs to the technical field of petroleum equipment, and discloses an expansion and salvage one-trip tubular column expansion pipe reinforcing tool which comprises an expansion pipe, a bottom plug assembly and a central pipe, an expansion cone is arranged in the expansion pipe and can move in the axial direction of the expansion pipe, and a clamping groove is formed in the expansion pipe; the bottom plug assembly comprises a bottom plug pipe and a supporting pipe, the bottom plug pipe is inserted into the expansion pipe, the bottom plug pipe is sleeved with a clamping spring, the bottom plug pipe opens the clamping spring to enable the clamping spring to be arranged in the clamping groove, and the clamping spring can move in the axial direction of the bottom plug pipe and retract; the supporting pipe is sleeved outside the bottom plug pipe through the shear pin and supports the snap spring; one end of the bottom plugging pipe away from the expansion cone is plugged; the first end of the central pipe is connected to the expansion cone, the second end of the central pipe is plugged with an oil pulling rod, and a fishing ring is arranged on the oil pulling rod; a liquid inlet hole is formed in the central pipe; therefore, expansion and salvage integrated operation can be completed through one-time drilling, the construction period is short, the speed is high, and the efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum equipment technical field especially relates to a kind of expansion, fishing one trip pipe string expansion pipe reinforcing tool. BACKGROUND

[0002] Expansion pipe technology has gradually matured, and is widely used in each link of drilling and completion by each oil field, wherein bottom plug plays the function of establishing pressure cavity in expansion operation, and traditional bottom plug is aluminum alloy material, which can be removed by grinding shoe after expansion operation. The widely used bottom plug is fishable bottom plug, which is fished out by fishable bottom plug after the completion of expansion operation. The two kinds of bottom plugs have the disadvantages of long construction cycle, slow speed and low efficiency. SUMMARY

[0003] The utility model discloses a kind of expansion, fishing one trip pipe string expansion pipe reinforcing tool, solve the disadvantages of long construction cycle, slow speed and low efficiency.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] Expansion, fishing one trip pipe string expansion pipe reinforcing tool, comprising:

[0006] Expansion pipe, expansion cone is arranged in the expansion pipe, the expansion cone can move axially along the expansion pipe to expand the expansion pipe, a clamping slot is arranged in the expansion pipe, and the clamping slot is located below the expansion cone.

[0007] Bottom plug assembly, the bottom plug tube is partially inserted into the expansion pipe, the bottom plug tube is sleeved with a clamping spring, the bottom plug tube can expand the clamping spring, so that the clamping spring is arranged in the clamping slot, the support tube is sleeved outside the bottom plug tube and connected with the bottom plug tube through a shear pin, the support tube supports the clamping spring to prevent the clamping spring from moving, when the clamping spring moves out of the clamping slot along with the expansion cone, the clamping spring can move axially along the bottom plug tube and retract, and the end of the bottom plug tube away from the expansion cone is connected with a plugged oil pipe.

[0008] Center tube, the first end of the center tube is connected to the expansion cone, the second end of the center tube is plugged with a pull oil rod, and a fishing collar capable of abutting against the bottom plug tube is arranged on the pull oil rod, a liquid inlet hole is arranged on the center tube, and the liquid inlet hole communicates the gap between the bottom plug tube and the center tube.

[0009] In some embodiments, the first inclined surface is arranged on the side wall of the expansion cone close to the clamping slot, and the first inclined surface gradually approaches the bottom plug tube from the groove bottom to the groove opening.

[0010] In some embodiments, the bottom plug pipe is provided with a second inclined surface, which gradually approaches the expansion pipe from one end of the expansion cone to the other end of the expansion cone.

[0011] In some embodiments, the bottom plug pipe comprises a bottom plug seat pipe and a bottom plug joint, the bottom plug joint is partially inserted into the bottom plug seat pipe, and the second inclined surface is arranged on the bottom plug seat pipe; the shear pin is connected to the bottom plug joint.

[0012] In some embodiments, the bottom plug joint is provided with a first abutting step, and the fishing collar can abut against the first abutting step.

[0013] In some embodiments, the support pipe is provided with a guide groove extending in the axial direction thereof, the bottom plug seat pipe is provided with a threaded hole, the bottom plug joint is provided with an embedding groove in the same direction as the guide groove, and the threaded hole is screwed with a positioning pin.

[0014] In some embodiments, the end of the bottom plug pipe is connected with a tubing coupling, the tubing coupling is connected with a tubing pipe, and the end of the tubing pipe away from the expansion cone is sealed with a bottom sealing seat to seal the bottom plug pipe.

[0015] In some embodiments, the outer wall of the bottom plug pipe is provided with a second abutting step, which is arranged below the support pipe to support the support pipe after the shear pin is broken.

[0016] In some embodiments, the expansion cone is connected with an upper joint for connecting an external lifting pipe.

[0017] In some embodiments, sealing rings are arranged between the expansion cone and the expansion pipe and between the bottom plug pipe and the expansion pipe.

[0018] The utility model discloses the beneficial effects of:

[0019] The bottom plug pipe is fixed in the clamping groove of the expansion pipe through the clamping spring, and the bottom plug pipe is fixed by the clamping spring supported and opened by the bottom plug pipe, and the support pipe for supporting the clamping spring is arranged on the bottom plug pipe, so as to limit the movement of the clamping spring and avoid the movement of the clamping spring along the bottom plug pipe, thereby retracting and separating from the clamping groove and maintaining stability; when the central pipe enters the liquid through the liquid inlet hole, the liquid gradually enters the gap between the bottom plug pipe and the central pipe, the hydraulic pressure increases, the expansion cone moves, the expansion pipe expands, and the expansion cone completely moves out of the expansion pipe; then the expansion cone can be lifted by force, the oil rod abuts against the bottom plug pipe, the shear pin is sheared under the action of the bottom plug pipe and the clamping spring, the clamping spring loses the abutment of the support pipe, the clamping spring moves and retracts along the bottom plug pipe and moves out of the clamping groove, so that the bottom plug assembly and the central pipe are lifted and moved out. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the expansion and fishing tool for one trip pipe string of the utility model;

[0021] Figure 2 is Figure 1 the enlarged view of A in the middle;

[0022] Figure 3 is a schematic view of the bottom plug assembly in the utility model;

[0023] Figure 4 is a schematic view of the expansion cone in the process of expanding the expansion pipe in the utility model;

[0024] Figure 5 is a schematic view of the expansion cone in the process of expanding the expansion pipe in the utility model;

[0025] in the figure:

[0026] 1, expansion pipe; 11, clamping groove; 12, first inclined surface; 2, expansion cone; 3, bottom plug assembly; 31, bottom plug pipe; 311, bottom plug seat pipe; 312, bottom plug joint; 313, second inclined surface; 314, first abutting step; 315, guide groove; 316, embedding groove; 317, positioning pin; 318, second abutting step; 32, support pipe; 4, clamping spring; 5, shearing pin; 6, center pipe; 61, liquid inlet hole; 7, oil rod; 8, fishing collar; 9, oil pipe joint; 10, oil pipe; 20, upper joint; 30, sealing ring; 40, oil rod joint; 50, bottom sealing seat. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0028] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.

[0030] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0031] As shown in Figures 1 to 5 The utility model provides a kind of expansion, fishing one trip pipe column expansion pipe 1 reinforcing tool, it includes expansion pipe 1, bottom plug assembly 3 and center tube 6, expansion pipe 1 is provided with expansion cone 2, expansion cone 2 can be moved axially along expansion pipe 1, to expand expansion pipe 1, expansion pipe 1 is provided with clamping slot 11, clamping slot 11 is below expansion cone 2;Bottom plug assembly 3 includes bottom plug tube 31 and support tube 32, bottom plug tube 31 is partially inserted in expansion pipe 1, bottom plug tube 31 is sleeved with clamping spring 4, bottom plug tube 31 can open clamping spring 4, so that clamping spring 4 is arranged in clamping slot 11, support tube 32 is sleeved on the outside of bottom plug tube 31, and is connected bottom plug tube 31 by shear pin 5, support tube 32 supports clamping spring 4, to prevent clamping spring 4 from moving;When clamping spring 4 moves out of clamping slot 11 along with expansion cone 2, clamping spring 4 can be moved axially along bottom plug tube 31 and retract;Bottom plug tube 31 is connected with the oil pipe 10 of plugging away from expansion cone 2;The first end of center tube 6 is connected on expansion cone 2, the second end of center tube 6 is plugged with pull oil rod 7, and fishing ring 8 capable of abutting bottom plug tube 31 is arranged on pull oil rod 7;Center tube 6 is provided with liquid inlet hole 61, and liquid inlet hole 61 is communicated with the gap between bottom plug tube 31 and center tube 6.

[0032] The bottom plug pipe 31 is fixed in the clamping groove 11 arranged on the expansion pipe 1 by the snap spring 4, and the snap spring 4 is supported by the support pipe 32 arranged on the bottom plug pipe 31 to fix the bottom plug pipe 31, so as to limit the movement of the snap spring 4 and avoid the snap spring 4 moving along the bottom plug pipe 31 to retract and disengage from the clamping groove 11, thereby maintaining stability; when the center pipe 6 is filled with liquid through the liquid inlet hole 61, the center pipe 6 is blocked by the oil rod 7, and the liquid gradually enters the gap between the bottom plug pipe 31 and the center pipe 6, so that the hydraulic pressure increases and the expansion cone 2 is moved to expand the expansion pipe 1 until the expansion cone 2 is completely moved out of the expansion pipe 1; then the expansion cone 2 can be lifted by force, the oil rod 7 is abutted against the bottom plug pipe 31, the shear pin 5 is sheared under the action of the bottom plug pipe 31 and the snap spring 4, the snap spring 4 loses the abutment of the support pipe 32, the snap spring 4 is moved out of the clamping groove 11 and retracts along the bottom plug pipe 31, so as to move out of the bottom plug assembly 3 and the center pipe 6 by lifting.

[0033] As shown in Figure 1 some embodiments, sealing rings 30 are arranged between the expansion cone 2 and the expansion pipe 1 and between the bottom plug pipe 31 and the expansion pipe 1, so as to avoid liquid leakage and ensure normal pressure increase to abut against the expansion cone 2.

[0034] It should be noted that the liquid inlet hole 61 is located below the expansion cone 2, so that the liquid used for pressure increase can flow into the gap between the center pipe 6 and the bottom plug pipe 31 through the liquid inlet hole 61 to continuously increase the pressure and abut against the expansion cone 2.

[0035] As shown in Figure 2 some embodiments, the bottom plug pipe 31 is provided with a second inclined surface 313, which gradually approaches the expansion pipe 1 from one end away from the expansion cone 2 to one end close to the expansion cone 2, so that when the snap spring 4 moves along the axial direction of the bottom plug pipe 31 from one end away from the expansion cone 2 to one end close to the expansion cone 2, the snap spring 4 can be gradually expanded and clamped into the clamping groove 11; at this time, the snap spring 4 is abutted against the support pipe 32 and cannot retract in the opposite direction, so as to be fixed to synchronously fix the bottom plug pipe 31.

[0036] As shown in Figure 2 some embodiments, in order to facilitate the snap spring 4 to move out of the clamping groove 11 along with the expansion cone 2, the side wall of the clamping groove 11 close to the expansion cone 2 is provided with a first inclined surface 12, which gradually approaches the bottom plug pipe 31 from the groove bottom to the groove opening, so that when the snap spring 4 loses the support of the support pipe 32, the snap spring 4 is extruded by the first inclined surface 12 and moves along the second inclined surface 313, so as to retract and move the snap spring 4 out of the clamping groove 11 and disengage from the expansion pipe 1.

[0037] As shown in Figure 2 and Figure 3As shown, specifically, the bottom plug pipe 31 comprises a bottom plug seat pipe 311 and a bottom plug joint 312, the bottom plug joint 312 is partially inserted into the bottom plug seat pipe 311 and is threadedly connected with the bottom plug seat pipe 311; a second inclined surface 313 is arranged on the bottom plug seat pipe 311 and the snap spring 4 is arranged on the bottom plug seat pipe 311; and the shear pin 5 is arranged on the bottom plug joint 312, so that the support pipe 32 is connected with the bottom plug joint 312 through the shear pin 5. More specifically, the support pipe 32 is provided with a guide groove 315 extending along the axial direction of the support pipe 32, the bottom plug joint 312 is further provided with an embedding groove 316 corresponding to the guide groove 315 and extending in the same direction, and the bottom plug seat pipe 311 is provided with a threaded hole, so that after the bottom plug seat pipe 311, the bottom plug joint 312 and the support pipe 32 are installed, the positioning pin 317 threadedly connected with the threaded hole from one side of the support pipe 32 can be rotated after the snap spring 4 is arranged in the clamping groove 11, so as to prevent the thread of the bottom plug seat pipe 311 and the bottom plug joint 312 from being loosened.

[0038] As shown in Figure 3 some embodiments, the outer wall of the bottom plug pipe 31 is provided with a second abutting step 318, which is arranged below the support pipe 32 at intervals, so that after the shear pin 5 is broken, the first inclined surface 12 abuts against the snap spring 4, the snap spring 4 moves and abuts against the support pipe 32, the support pipe 32 moves until the second abutting step 318, and the movement of the snap spring 4 is limited, so as to avoid excessive movement of the snap spring 4. In order to ensure the upward movement of the bottom plug assembly 3, the bottom plug joint 312 is further provided with a first abutting step 314, and the fishing collar 8 abuts against the first abutting step 314 after the upward movement of the expansion cone 2, so that the fishing collar 8 can be lifted, the snap spring 4 is pressed by the first inclined surface 12, and the shear pin 5 is sheared under the action of the snap spring 4 abutting against the support pipe 32.

[0039] As shown in Figure 1 some embodiments, the center pipe 6 is connected with the oil rod coupling 40 at the end away from the expansion cone 2, and the oil rod 7 is connected with the oil rod coupling 40. In addition, the bottom plug joint 312 is connected with the oil pipe coupling 9, the oil pipe coupling 9 is connected with the oil pipe 10, and the oil pipe 10 is connected with the bottom plug seat 50 at the end away from the expansion cone 2, so as to seal the bottom plug pipe 31.

[0040] As shown in Figure 1 some embodiments, the expansion cone 2 is further connected with the upper joint 20, and the external lifting pipe is connected through the upper joint 20, so as to lift the expansion cone 2 after the expansion movement and the completion of the expansion. Exemplarily, the expansion cone 2 and the upper joint 20 can be but are not limited to threadedly connected.

[0041] The working process is briefly described as follows:

[0042] As shown in Figure 1 , Figure 4 and Figure 5As shown, after the expansion, fishing and one-trip pipe string expansion pipe 1 assembly is completed, the upper connector 20 is connected to the lifting pipe to the designated position downhole, and then the liquid injection is pressed, and since the lower end of the center pipe 6 is blocked by the pull rod 7, the injected liquid enters the gap between the center pipe 6 and the bottom plug seat pipe 311 through the liquid inlet hole 61 of the center pipe 6, and since the tubing 10 is blocked by the bottom plug seat 50, the pressure will continue to increase, and then the expansion cone 2 is pushed up and moved up, at this time the lifting pipe can be lifted with the expansion cone 2, the expansion cone 2 and the bottom connected pull rod 7 are lifted together during the expansion of the expansion cone 2, and the expansion cone 2 expands the expansion pipe 1 during the upward movement, and the expansion operation is completed. After the expansion is completed, the hydraulic pressure disappears, the lifting pipe is continuously lifted, the fishing ring 8 of the pull rod 7 is abutted to the first abutment step 314, so that during the lifting process, the bottom plug connector 312 is continuously stressed upward, the support pipe 32 is moved upward with the bottom plug connector 312 under the action of the shear pin 5, but the snap spring 4 is clamped at the second inclined surface 313, with the increase of the lifting force, the shear pin 5 is cut off, the bottom plug connector 312 drives the bottom plug seat pipe 311 to move upward, and the support pipe 32 moves downward after being abutted to the first inclined surface 12 with the snap spring 4, the snap spring 4 is retracted during the movement, and finally the support pipe 32 is abutted to the second abutment step 318 and no longer moves, the support pipe 32 abuts the snap spring 4 to disengage the clamping groove 11, and moves out of the expansion pipe 1 with the lifting; so that one-trip drilling can complete the expansion and fishing integrated operation, the construction period is short, the speed is fast, and the efficiency is higher.

[0043] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An expandable, fishing, and running in one tubular string expansion tool, characterized in that, The utility model provides a kind of bottom plug assembly and expansion pipe, including: Expansion pipe (1), expansion cone (2) is arranged in the expansion pipe (1), expansion cone (2) can be moved axially along the expansion pipe (1), to expand the expansion pipe (1), clamping groove (11) is arranged in the expansion pipe (1), clamping groove (11) is below expansion cone (2); Bottom plug assembly (3), bottom plug assembly (3) includes bottom plug pipe (31) and support pipe (32), bottom plug pipe (31) is partially inserted in the expansion pipe (1), bottom plug pipe (31) is sleeved with clamping spring (4), bottom plug pipe (31) can prop open clamping spring (4), so that clamping spring (4) is arranged in clamping groove (11), support pipe (32) is sleeved on the outside of bottom plug pipe (31), and bottom plug pipe (31) is connected by shearing pin (5), support pipe (32) supports clamping spring (4), to prevent clamping spring (4) from moving;When clamping spring (4) moves out of clamping groove (11) along with expansion cone (2), clamping spring (4) can be moved axially along bottom plug pipe (31) and retract;Bottom plug pipe (31) is connected with blocked tubing (10) away from expansion cone (2) one end; Center pipe (6), the first end of center pipe (6) is connected to expansion cone (2), the second end of center pipe (6) is blocked with pull oil rod (7), and fishing ring (8) capable of abutting bottom plug pipe (31) is arranged on pull oil rod (7);Center pipe (6) is provided with liquid inlet hole (61), and the gap between bottom plug pipe (31) and center pipe (6) is communicated.

2. The expandable, fishing, run-in-the-hole, tubular- reinforcement tool of claim 1, wherein, The side wall of clamping groove (11) near expansion cone (2) is provided with first inclined plane (12), and the first inclined plane (12) gradually approaches bottom plug pipe (31) from groove bottom to groove mouth.

3. The expandable, fishing, run-in-the-hole, tubular- reinforcement tool of claim 1, wherein, Bottom plug pipe (31) is provided with second inclined plane (313), and the second inclined plane (313) gradually approaches expansion pipe (1) from one end away from expansion cone (2) to one end close to expansion cone (2).

4. The expandable, fishing, run-in-the-hole, tubular- reinforcement tool of claim 3, wherein, Bottom plug pipe (31) includes bottom plug seat pipe (311) and bottom plug connector (312), bottom plug connector (312) is partially inserted into bottom plug seat pipe (311), and second inclined plane (313) is arranged on bottom plug seat pipe (311);Shearing pin (5) is connected to bottom plug connector (312).

5. The expandable, fishing, run-in-the-hole, tubular- reinforcement tool of claim 4, wherein, First abutting step (314) is arranged in bottom plug connector (312), and fishing ring (8) can abut on first abutting step (314).

6. The expandable, fishing, run-in-the-hole, tubular- reinforcement tool of claim 4, wherein, Support pipe (32) is provided with guide groove (315) extending along its axial direction, bottom plug seat pipe (311) is provided with screw hole, bottom plug connector (312) is provided with embedding groove (316) in the same direction with guide groove (315), and screw hole is screwed with positioning pin (317).

7. An expandable, fishing, run-in-tubular, expansion-tubing, reinforcement tool according to any of claims 1-6, characterized in that, The end of the bottom plug pipe (31) is connected with a tubing coupling (9), the tubing coupling (9) is connected with the tubing (10), and the tubing (10) is sealed with a bottom sealing seat (50) at the end away from the expansion cone (2) to seal the bottom plug pipe (31).

8. An expandable, fishing, run-in-tubular, expandable tubular reinforcement tool according to any of claims 1-6, characterized in that, A second abutting step (318) is arranged on the outer wall of the bottom plug pipe (31) and is arranged below the support pipe (32) at intervals to support the support pipe (32) after the shear pin (5) is broken.

9. An expandable, fishing, run-in-tubular, expandable tubular reinforcement tool according to any of claims 1-6, characterized in that, An upper joint (20) is connected to the expansion cone (2) and is used to connect an external lift pipe.

10. An expandable, fishing, run-in-tubular, expandable tubular reinforcement tool according to any of claims 1-6, characterized in that, Sealing rings (30) are arranged between the expansion cone (2) and the expansion pipe (1) and between the bottom plug pipe (31) and the expansion pipe (1).

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