CN218092963U

CN218092963U - A running tool for multilateral well tail pipe

Info

Publication number: CN218092963U
Application number: CN202221437625.0U
Authority: CN
Inventors: 唐洪林; 刘晗; 张辉; 杨春旭; 吴仲华; 陈勇; 陈锐; 赵宗锋; 任红; 张锐
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Current assignee: China Petroleum and Chemical Corp; Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-12-20
Anticipated expiration: 2032-06-09

Abstract

The utility model provides a running tool for multilateral well tail pipe, include: the pipe wall of the mandrel is provided with a flow guide hole; the steel ball can seal the inner cavity of the mandrel, so that the drilling fluid pressure in the inner cavity of the mandrel is transmitted to the outside through the diversion hole; the tail pipe is sleeved on the outer side of the mandrel in a clearance manner; and a fixing component for connecting the mandrel and the tail pipe, wherein the fixing component is sleeved between the mandrel and the tail pipe, the pressure in the inner cavity of the mandrel is transmitted to the fixing component through the flow guide hole, and the fixing component is constructed to be capable of being separated from the tail pipe in response to the pressure transmitted from the flow guide hole. The utility model discloses only need the bowling just once can accomplish the separation process of tail pipe, compact structure is succinct, and the reliability is high. Furthermore, the utility model discloses under the condition that the bowling hydraulic pressure became invalid, can also accomplish the process through mechanical rotation's mode, strengthen the utility model discloses a practical reliability.

Description

A running tool for multilateral well tail pipe

Technical Field

The utility model belongs to the technical field of the well completion of lateral well, specifically, relate to a send into instrument for lateral well tail pipe.

Background

The branch well technology is a novel drilling technology developed after directional well, side drilling and horizontal well technologies. The branch well technology can reduce the drilling cost and improve the comprehensive development benefit of the oil field; the production speed and the final recovery rate can be improved, the oil drainage mode of the oil and gas reservoir is improved, the reserve is increased, and the oil reservoir is easier to manage in the whole exploitation period of the oil field.

Liner cementing is an important link in the branch well technology, and is mainly characterized in that tools such as a hanger, a liner and the like are conveyed to a specified position underground through a drilling tool connected with a conveying tool, and then well cementing and cementing operations are carried out.

After the liner has been run into the desired location, it is necessary to separate the liner from the running tool to which it is connected for subsequent work to be performed. Chinese patent document CN104481438A discloses a multilateral well open hole anchoring tie-back completion process and a tail pipe running-in tool thereof, wherein the tool runs a tail pipe running-in tool, an open hole tie-back barrel, an open hole anchor, a bottom ball seat and a tail pipe completion string into a preset position in a well together, puts a first ball, presses back to open the open hole anchor, anchors the whole string in the well, continuously increases the pressure to ensure that the bottom ball seat is communicated again, and can establish circulation again; and then a second ball is put into the tail pipe running tool, the second ball is seated on the ball seat of the tail pipe running tool, pressure is suppressed, the tail pipe running tool is released, and the tail pipe running tool is taken out. The tool needs to shoot balls for multiple times to build pressure, the operation is complex, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems, the present invention is directed to a running tool for a tail pipe of a multilateral well, which enables the tail pipe to be quickly separated after the tail pipe reaches a designated position.

According to the utility model discloses, a running tool for branch's well tail pipe is provided, include:

the pipe wall of the mandrel is provided with a flow guide hole;

the steel ball can seal the inner cavity of the mandrel, so that the drilling fluid pressure in the inner cavity of the mandrel is transmitted to the outside through the flow guide hole;

the tail pipe is sleeved outside the mandrel in a clearance manner;

the fixing component is used for connecting the mandrel and the tail pipe, the fixing component is sleeved between the mandrel and the tail pipe, the pressure in the inner cavity of the mandrel is transmitted to the fixing component through the flow guide hole,

wherein the fixing assembly is configured to be disconnected from the tail pipe in response to pressure transmitted from the pilot hole.

In one embodiment, the fixing assembly comprises:

the slips are clamped with the tail pipe;

the pushing sleeve is arranged between the slips and the mandrel and used for radially abutting against the slips to enable the slips and the tail pipe to be kept in a clamping state;

a shear pin connecting the slip and the push sleeve,

the pushing sleeve is constructed to respond to the pressure transmitted by the diversion hole and cut off the shearing pin, so that the slip is axially and relatively displaced, the mutual abutting state is removed, and the slip and the tail pipe are further removed from being clamped.

In one embodiment, the fixing assembly further comprises a shear pin sleeve, an annular cavity is arranged on one side of the shear pin sleeve close to the mandrel,

the push sleeve is arranged in the annular cavity, sealing elements are arranged between the contact surfaces of the push sleeve, the shear pin sleeve and the mandrel,

the flow guide hole is communicated with the annular cavity,

the slips penetrate through the shear pin sleeve in the radial direction in a sliding mode.

In one embodiment, a first protrusion is arranged on the pushing sleeve, a second protrusion for abutting against the first protrusion is arranged on the slip, and the first protrusion and the second protrusion are configured to be mutually dislocated when the pushing sleeve and the slip are relatively axially displaced, so that the pushing sleeve and the slip are released from an abutting state.

In one embodiment, a ball seat is provided at the bottom end of the mandrel for sealing engagement with the steel ball.

In one embodiment, the tail pipe is provided with a thread at the lower end thereof for connecting with a downhole tool below, the tail pipe is provided with a groove on the inner wall thereof, the pipe wall of the mandrel is further provided with a one-way key capable of radially extending out of the region of the mandrel, the one-way key is configured to be capable of being matched with the groove, and when the one-way key rotates along with the mandrel towards one direction, the one-way key can be clamped in the groove so as to push the tail pipe to rotate together, so that the tail pipe is connected with the downhole tool below through the thread.

In one embodiment, the slips are fixedly connected with the tail pipe in the circumferential direction, the pushing sleeve is fixedly connected with the mandrel in the circumferential direction, and the one-way key is configured to be capable of contracting in the radial direction when rotating towards the other direction, so that clamping with the groove is released, the mandrel and the tail pipe are rotated relatively, the slips and the pushing sleeve are moved relatively, and a shearing pin is sheared.

In one embodiment, one side of the rotation direction of the one-way key is set to be a slope, the other side is set to be a plane, and a spring is radially arranged between the one-way key and the mandrel.

In one embodiment, a through hole is radially formed in the one-way key, a bolt is arranged in the through hole, and a thread for connecting with the mandrel is arranged at the tail end of the bolt.

In one embodiment, a loading sleeve, a thrust bearing and a joint are sleeved on the mandrel, the joint is arranged at the top of the mandrel, the loading sleeve is positioned below the joint, and the upper end face and the lower end face of the thrust bearing are respectively abutted with the joint and the loading sleeve.

Compared with the prior art, the method has the following advantages.

The utility model discloses only need the bowling just can accomplish the separation process of tail pipe once, compact structure is succinct, and the reliability is high.

Furthermore, the utility model discloses still be provided with one-way key and recess, under these cooperation between the two, can cut the shear pin through the mode of mechanical rotation to accomplish the separation process of tail pipe. Under the condition that the bowling hydraulic pressure became invalid, can also accomplish the process through the mode of mechanical rotation, strengthen the utility model discloses a practical reliability.

Drawings

The present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a schematic of a running tool for a lateral liner according to the present invention;

figure 2 shows a schematic of the structure of a running tool for the tail pipe of a multilateral well according to the invention when the tail pipe is released;

fig. 3 shows a schematic structural view of a one-way key according to the present invention;

fig. 4 shows a schematic diagram of the right-side structure of fig. 3.

In the figure: 1. a mandrel; 11. a first mandrel; 12. a second mandrel; 13. a third mandrel; 14. a flow guide hole; 2. a tail pipe; 21. a groove; 3. a fixing component; 31. slips; 314. a second protrusion; 32. a push sleeve; 321. a first protrusion; 33. shearing the pin; 34. a shear pin sleeve; 341. an annular cavity; 4. a steel ball; 41. a ball seat; 5. a one-way key; 51. a spring; 52. a through hole; 53. a bolt; 54. a protruding block; 55. a bevel; 56. a plane; 6. a loading sleeve; 7. a joint; 8. a thrust bearing; 9. a locking sleeve; 91. and a stop block.

In the present application, the drawings are schematic, merely illustrative of the principles of the invention, and are not drawn to scale.

Detailed Description

In the present application, the directional terms or qualifiers "upper" and "lower" used in the present application are all with reference to fig. 1. They are not intended to limit the absolute positions of the parts involved, but may vary from case to case.

FIG. 1 shows a schematic diagram of one embodiment of a running tool 100 for a lateral liner according to the present invention. As shown in fig. 1, a running tool 100 for a lateral liner includes a mandrel 1, a liner 2, a retainer assembly 3, and steel balls 4. The fixed component 3 is sleeved on the mandrel 1, and the tail pipe 2 is fixedly sleeved outside the fixed component 3. Specifically, in the present embodiment, the spindle 1 includes a first spindle 11, a second spindle 12, and a third spindle 13 integrally connected in this order from top to bottom. The fixing component 3 is sleeved on the first mandrel 11, and the lower end of the fixing component 3 is contacted with the upper end face of the second mandrel 12. By means of the arrangement, after the tail pipe 2 is sleeved on the fixing component 3, the tail pipe 2 cannot slide down from the lower part of the mandrel 1, and therefore the tail pipe 2 is fixed on the mandrel 1. A flow guide hole 14 is formed in the pipe wall of the first mandrel 11 in the area corresponding to the fixing component 3. When using the utility model discloses after putting tail pipe 2 to the assigned position, drop into the inside of mandrel 1 with steel ball 4, seal mandrel 1, the drilling fluid of pump injection can only flow the region at fixed subassembly 3 place through water conservancy diversion hole 14 in mandrel 1 this moment. The fixed assembly 3 is disconnected from the tail pipe 2 after being subjected to the pressure of the drilling fluid, so that the tail pipe 2 is lowered to a designated position.

In accordance with the present invention, in a particular embodiment, the securing assembly 3 includes a shear pin sleeve 34, a slip 31 and a push sleeve 32. The slips 31 and the pushing sleeve 32 are abutted against each other, one side of the slips 31 far away from the pushing sleeve 32 is clamped with the tail pipe 2, and one side of the pushing sleeve 32 far away from the slips 31 is abutted against the mandrel 1. The shear pin sleeve 34 is sleeved on the mandrel 1, an annular cavity 341 is arranged on one side of the shear pin sleeve 34 close to the mandrel 1, the pushing sleeve 32 is arranged in the annular cavity 341, and sealing elements are arranged on contact surfaces of the pushing sleeve 32, the mandrel 1 and the shear pin sleeve 34. The slips 31 are then slidably radially penetratingly disposed on the shear pin sleeve 34. At the same time, the push sleeve 32 and the shear pin sleeve 34 are fixedly connected by means of radially arranged shear pins 33, in such a way that the slips 31 and the push sleeve are fixedly connected. The flow guide holes 14 communicate the inner cavity of the mandrel 1 with the annular cavity 341. In this arrangement, pressure in the interior of the mandrel 1 can be transferred to the annular cavity 341 and move the push sleeve 32 downwardly relative to the shear pin sleeve 34 and slips 31, thereby cutting off the shear pin 33. As shown in fig. 2, after the shear pin 33 is broken, the push sleeve 32 continues to move until it is out of contact with the slips 31, so that the slips 31 can be radially contracted and the slips 31 are released from the engagement with the liner 2. The mandrel 1 may then be lifted up leaving the slips 31 in the designated positions.

In one embodiment, the slip 31 and tailpipe 2 are provided with cooperating notches and detents (not shown) on their interface. In this way a snap fit is formed.

In one embodiment, a second protrusion 311 is provided on the slip 31 and a first protrusion 321 is provided on the push sleeve 32. The first projection 321 and the second projection 311 abut against each other, and the slip 31 and the push sleeve 32 abut against each other. As shown in fig. 2, in this arrangement, the push sleeve 32 is moved axially relative to the slip 31 by a distance corresponding to one first projection 321, and the slip 31 and the push sleeve 32 are released from the abutment state by displacing the first projection 321 and the second projection 311 from each other.

In a particular embodiment, a ball seat 41 is provided by threading on the bottom end of the mandrel 1. The ball seat 41 extends into the inner cavity of the mandrel 1, and the diameter of the steel ball 4 is smaller than that of the inner cavity of the mandrel 1 and larger than the inner diameter of the ball seat 41. With the arrangement, the steel ball 4 can be plugged after being lowered into the ball seat 41 from the top of the mandrel 1, and the operation is simple.

In a preferred embodiment, a groove matching the shape of the steel ball 4 is provided on the top of the ball seat 41 to enhance the sealing effect.

In a preferred embodiment, the bottom of the tailpipe 2 is provided with a thread (not shown), by means of which the tailpipe 2 can be connected to a downhole tool (not shown) below.

In a particular embodiment, a one-way key 5 is provided on the second mandrel 12, sliding along its radial direction. A spring 51 is provided in the radial direction between the one-way key 5 and the second spindle 12. The one-way key 5 is allowed to contract and expand radially by providing a spring 51. As shown in fig. 3 and 4, the one-way key 5 is provided with a slope 55 on one side and a flat 56 on the other side in the circumferential direction of the second spindle 12. Meanwhile, a groove 21 for fitting with the one-way key 5 is provided on the inner wall of the tail pipe 2. In this arrangement, when the one-way key 5 rotates in the forward direction following the spindle 1, and the inclined surface 55 abuts against the inner wall of the tail pipe 2, the one-way key 5 can contract inward; when the one-way key 5 rotates reversely along with the mandrel 1 and the plane 56 abuts against the inner wall of the tail pipe 2, the one-way key 5 does not contract and drives the tail pipe 2 to rotate together.

It will be readily understood that the forward and reverse rotations are described herein only to distinguish between the two rotational directions and are not intended to specifically refer to forward and reverse directions.

Use the utility model discloses after putting into tail pipe 2 specified position in the pit, just can install tail pipe 2 on the downhole tool of below through the screw thread of tail pipe bottom through rotatory mandrel 1. As described above, when the spindle 1 is reversely rotated, the tail pipe 2 follows the spindle 1 to rotate together by the one-way key 5. In this way the purpose of securing the tailpipe 2 to the downhole tool below can be achieved.

According to the utility model discloses, through the mutual joint of structure of fixture block and draw-in groove between slips 31 and the tail pipe 2, not only can restrict axial relative movement, can also restrict axial relative movement. The push sleeve 32 can only move axially relative to the spindle 1 and cannot move axially relative to the spindle, and in particular, an axial guide groove (not shown) may be provided between the push sleeve 32 and the spindle 1, or other means known in the art may be used. With the above arrangement, after the tailpipe 2 is secured to the downhole tool below, the mandrel 1 is rotated in the forward direction, and the tailpipe 2 is not carried because the one-way key 5 is contracted when the mandrel 1 is rotated in the forward direction. At this time, the mandrel 1 is in a forward rotation state, the push sleeve 32 rotates along with the mandrel 1, the tail pipe 2 is connected with a downhole tool below in a fixed state, and the slips 31 and the shear pin sleeve 34 are also fixed. The mandrel 1 thus displaces the driving sleeve 32 and the shear pin sleeve 34 relative to each other, shearing the shear pin 33. This method of operation, as described above, can be used as a backup mode of operation. When the mode of bowling hydraulic pressure can't cut shear pin 33 because of the unexpected condition, can cut shear pin 33 through the mode of rotatory mandrel 1, thereby strengthen the utility model discloses a practicality and reliability.

In a particular embodiment, a locking sleeve 9 is provided on the third spindle 13 by means of a thread. The locking sleeve 9 is used to lock the one-way key 5 and prevent the one-way key 5 from sliding radially outward out of the limited range of the mandrel 1. Specifically, as shown in fig. 1 and 3, a stopper 91 is provided at the upper end of the locking sleeve 9, and a protruding block 54 is provided at both the upper and lower ends of the one-way key 5, the protruding block 54 at the upper end of the one-way key 5 is stopped by the spindle 1, and the protruding block 54 at the lower end of the one-way key 5 is stopped by the stopper 91 of the locking sleeve 9.

According to the utility model discloses, be provided with joint 7 through the thread tightening at the top of first mandrel 11 for connect other downhole tool, be convenient for rotatory mandrel 1. The upper part of the mandrel 1 is also sleeved with a loading sleeve 6 and a thrust bearing 8, the lower end of the loading sleeve 6 is abutted against the tail pipe 2, the upper end of the loading sleeve 6 is abutted against the thrust bearing 8, and the upper end of the thrust bearing 8 is abutted against the joint 7. The provision of the thrust bearing 8 makes it possible to rotate the spindle 1 more smoothly.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A running tool for a lateral liner, comprising:

the pipe wall of the mandrel (1) is provided with a flow guide hole (14);

the steel ball (4) can close the inner cavity of the mandrel (1) so that the drilling fluid pressure in the inner cavity of the mandrel (1) is transmitted to the outside through the diversion hole (14);

the tail pipe (2) is sleeved outside the mandrel (1) in a clearance manner;

a fixing component (3) for connecting the mandrel (1) and the tail pipe (2), wherein the fixing component (3) is sleeved between the mandrel (1) and the tail pipe (2), the pressure in the inner cavity of the mandrel (1) is transmitted to the fixing component (3) through a flow guide hole (14),

wherein the fixing component (3) is configured to be capable of being disconnected from the tail pipe (2) in response to the pressure transmitted from the pilot hole (14).

2. A running tool for a branch well liner according to claim 1, wherein the securing assembly (3) comprises:

slips (31) clamped with the tail pipe (2);

a pushing sleeve (32) arranged between the slips (31) and the mandrel (1) and used for radially abutting against the slips (31) so as to keep the slips (31) and the tail pipe (2) in a clamping state;

a shear pin (33) connecting the slips (31) and the push sleeve (32),

the pushing sleeve (32) is configured to respond to pressure transmitted by the diversion hole (14) and cut off the shearing pin (33), so that the shearing pin and the slip (31) are axially displaced relative to each other, the mutual abutting state is removed, and the clamping connection between the slip (31) and the tail pipe (2) is further removed.

3. A running tool for a lateral liner according to claim 2, wherein the fastening assembly further comprises a shear pin sleeve (34), an annular cavity (341) being provided at a side of the shear pin sleeve (34) adjacent to the mandrel (1),

the pushing sleeve (32) is arranged in the annular cavity (341), sealing elements are arranged between the contact surfaces of the pushing sleeve (32) and the shear pin sleeve (34) as well as the mandrel (1),

the flow guide hole (14) is communicated with the annular cavity (341),

the slips (31) are arranged on the shear pin sleeve (34) in a radially penetrating and sliding manner.

4. A running tool for a lateral liner according to claim 3, wherein a first projection (321) is provided on the push sleeve (32), and a second projection (314) is provided on the slip (31) for abutment with the first projection (321), the first and second projections being configured to be displaced from each other upon relative axial displacement of the push sleeve (32) and the slip (31) to release the push sleeve (32) and the slip (31) from abutment.

5. A running tool for a lateral liner according to any of claims 1 to 4, wherein a ball seat (41) for sealing engagement with the steel ball (4) is provided at the bottom end of the mandrel (1).

6. A running tool for a lateral well tail pipe according to any one of claims 2 to 4, characterized in that a screw thread for connecting with a downhole tool below is provided at the lower end of the tail pipe (2), a groove (21) is provided on the inner wall of the tail pipe (2), a one-way key (5) capable of radially extending out of the area of the mandrel (1) is further provided on the pipe wall of the mandrel (1), the one-way key (5) is configured to be capable of cooperating with the groove (21), and when the one-way key (5) rotates in one direction following the mandrel (1), the one-way key (5) can be stuck in the groove (21) to push the tail pipe (2) to rotate together, so that the tail pipe (2) is connected with the downhole tool below through the screw thread.

7. A running tool for a branch well liner according to claim 6, wherein the slips (31) are fixedly connected circumferentially to the liner (2), the push sleeve (32) is fixedly connected circumferentially to the mandrel (1), and the one-way key (5) is configured to contract radially when the one-way key (5) is rotated in the other direction, releasing the engagement with the groove (21), thereby causing relative rotation of the mandrel (1) and the liner (2) and relative movement of the slips (31) and the push sleeve (32), shearing off the shear pin (33).

8. A running tool for a branch well liner according to claim 7, characterized in that one side of the direction of rotation of the one-way key (5) is arranged as a bevel and the other side is arranged as a flat surface, and that a spring (51) is arranged radially between the one-way key (5) and the mandrel (1).

9. A running tool for a lateral liner according to claim 8, wherein a through hole (52) is radially provided in the one-way key (5), a bolt (53) is provided in the through hole (52), and the mandrel is threadedly connected to the rear end of the bolt (53).

10. The running tool for a lateral well tail pipe according to any one of claims 1 to 4, characterized in that a loading sleeve (6), a thrust bearing (8) and a joint (7) are sleeved on the mandrel (1), the joint (7) is arranged at the top of the mandrel (1), the loading sleeve (6) is positioned below the joint (7), and the upper end surface and the lower end surface of the thrust bearing (8) are respectively abutted to the joint (7) and the loading sleeve (6).