CN218816309U

CN218816309U - Removal device for catheter

Info

Publication number: CN218816309U
Application number: CN202223024515.4U
Authority: CN
Inventors: 张锐; 杨恒涛; 胥豪; 张辉; 刘晗; 陈锐
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: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-04-07
Anticipated expiration: 2032-11-14

Abstract

The utility model provides a remove device for pipe, including placing the broken unit in the pipe, it includes rotary tool to and the biasing mechanism of setting on rotary tool, rotary tool can rotate under the effect of external force, thereby cooperates the solid matter outside the broken pipe of biasing mechanism, places the first unit of removing in the pipe, and it can form the perforation in the pipe, thereby outwards discharges the solid matter, places the second in the pipe and removes the unit, and it can cut the pipe and shift out it. The utility model discloses can demolish work stage by stage to the pipe to can satisfy the requirement of complicated operating mode operation in the pit, with the work of removing of accomplishing the pipe.

Description

Removal device for catheter

Technical Field

The utility model relates to an oil and gas field well drilling field specifically relates to a remove device for pipe.

Background

Currently, the production of hydrocarbons in reservoirs is typically performed by drilling a well using a conductor (conductor includes steel pipe, tubing, casing, liner). The conduits can be run sequentially into the wellbore and the diameter of the conduit closest to the surface is greater than the diameter of the conduit longitudinally down the wellbore. The axial length of a larger diameter conduit limits the axial length of a subsequently run smaller diameter conduit due to the overlap that occurs when running multiple lengths of conduit. In addition, after the first length of tubing has been run into the wellbore, cement must be pumped into both the annulus between the tubing and the wellbore and the annulus between adjacent tubing to fix the layers of tubing to the surrounding formation.

When the reservoir exploitation enters the later stage, the production operation has already emptied the reservoir of the reservoir, and the oil well at the moment has no recoverable economic benefit any more. It is therefore common practice to provide a pressure barrier (including a cement plug) in the wellbore between the underlying reservoir and the bottom surface, however, providing a pressure barrier necessitates removing a portion of the conduit. However, since the conduit has been previously fixed by cement, the removal work of the conduit is very difficult, and much labor, material and time are required.

CN111216182B discloses a pipe cutting device, which comprises a bod, be equipped with the cavity that runs through about in the middle of the organism, be equipped with the recess on the cavity diapire, cavity left side upper end is equipped with first movable chamber, first movable chamber upper end wall fixed mounting has the rotating electrical machines, rotating electrical machines lower extreme power is connected with first screw rod, first screw rod normal running fit first movable chamber diapire, threaded connection has the fly leaf on the first screw rod, fly leaf sliding fit first movable intracavity wall, the first movable rod of fly leaf fixedly connected with, first movable rod lower extreme stretches into fixedly connected with fixture block in the cavity, first movable rod sliding fit the cavity with wall body between the first movable chamber.

The above devices, while capable of cutting a catheter, still have some problems that are difficult to overcome. One is that it is difficult to perform complicated operations downhole due to the large volume of the device. Secondly, because all pack the cement layer between the pipe of all levels in the pit shaft, consequently the device is difficult to the requirement of the borehole operating mode operation that satisfies to the removal work of unable pipe.

Accordingly, it would be desirable in the art to provide a removal device for a catheter that addresses the above-described difficulties in removing the catheter.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a remove device for pipe, it can loop through crushing unit, first removal unit and second and remove the unit and realize the work of demolising stage by stage to the pipe to can satisfy the requirement of complicated operating mode operation in the pit with the removal work of accomplishing the pipe.

According to the present invention there is provided a removal device for a catheter, comprising a crushing unit for placement into a catheter, comprising a rotary tool in the form of a cylinder, and a biasing mechanism provided on said rotary tool, said rotary tool being configured to be rotatable under an external force to cooperate with said biasing mechanism to crush solid matter outside the catheter,

a first removal unit for placement into the conduit, configured to form perforations in the conduit after the solid matter has been broken up, thereby discharging the solid matter outwardly,

a second removal unit for placement into the conduit capable of cutting and removing the conduit after the solid matter has been discharged.

In one embodiment, the biasing mechanism includes a first biasing member and a second biasing member alternately sleeved outside the rotary tool along the axial direction, and the first biasing member and the second biasing member are both configured into an annular structure.

In one embodiment, the first offset member and the second offset member are circumferentially offset.

In one embodiment, the biasing mechanism further includes a plurality of elastic members disposed in the rotary tool through slots, and a free end of each elastic member is fixedly connected to the first end of the second biasing member.

In one embodiment, the biasing mechanism further comprises a piston mechanism disposed within the rotary tool through a through slot, a first end of the piston mechanism extending radially into the chamber of the rotary tool, a second end fixedly connected to a second end of the second biasing member,

the piston mechanism is configured to urge the second biasing member radially outward against the resilient force of the resilient member under the action of an external force, thereby allowing the second end of the second biasing member to abut the inner surface of the conduit to expand the conduit radially outward.

In one embodiment, the piston mechanism includes a first piston portion and a second piston portion, wherein a diameter of the second piston portion is larger than a diameter of the first piston portion, and the first piston portion and the second piston portion are each sealingly connected to an inner peripheral surface of the through groove.

In one embodiment, a radially outwardly extending step is formed at the junction of the through slot and the first piston portion for limiting the travel of the second piston portion.

In one embodiment, the first removal unit includes a circulation tool in the form of a column, perforation tools disposed at both ends of the circulation tool, and packers disposed in the middle of the circulation tool, wherein the perforation tools are configured to form first and second perforations spaced apart in the axial direction of the conduit.

In one embodiment, the perforation tool comprises at least one of a jet perforating gun, a bullet perforating gun, a chemical cutter, a mechanical cutter, and a plasma cutter.

In one embodiment, the second removal unit comprises a cutting tool for cutting the guide tube, and a lifting tool connected to the cutting tool for moving the guide tube out of the well.

Compared with the prior art, the utility model has the advantages of: the utility model discloses can loop through broken cell, first removal unit and second and remove the unit and realize the work of demolising stage by stage to the pipe to can satisfy the requirement of complicated operating mode operation in the pit in order to accomplish the work of removing of pipe. Furthermore, the utility model discloses still carry out crushing work with the solid matter outside the pipe through first biasing piece and second biasing piece to can accomplish the removal work to the pipe more easily in subsequent work.

Drawings

The invention will be described in detail below with reference to the attached drawings, in which:

figure 1 schematically shows the structure of a removal device for catheters according to the invention;

figure 2 is a cross-sectional cut-away view of a second biasing member in a removal device for a catheter according to the present invention;

fig. 3 schematically shows the structure of a first removing unit in a removing device for a catheter according to the present invention.

In the drawings, like parts are given like reference numerals. The figures are not drawn to scale.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the following description is made in further detail with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

Fig. 1 schematically shows the structure of a removal device for catheters according to the invention.

As shown in fig. 1, according to a first aspect of the invention, a removal device for a catheter is proposed, mainly comprising a crushing unit 1. The crushing unit 1 comprises a rotating tool 11 which can be plunged into the conduit 6 and a biasing mechanism 12. Wherein the rotary tool 11 is configured as a hollow cylindrical structure. The biasing mechanism 12 is sleeved outside the rotary tool 11 and can rotate along with the rotary tool 1.

According to one embodiment of the present invention, the rotating tool 11 is configured to be rotatable under the influence of an external force, thereby engaging the biasing mechanism 12 to perform a crushing operation on the fixed material 5 outside the conduit 6. The content of which is described below.

According to the present invention, the biasing mechanism 12 includes a first biasing member 121 and a second biasing member 122, both configured as a ring structure. The first biasing members 121 and the second biasing members 122 are alternately arranged on the rotary tool 11 in the circumferential direction. According to an embodiment of the present invention, the second biasing member 122 is configured to be radially movable by an external force, thereby urging both the first biasing member 121 and the second biasing member 122 to abut against the inner circumferential surface of the guide tube 6. This helps to break up the solid matter 5 outside the conduit 6 sufficiently later.

Preferably, the first biasing member 121 and the second biasing member 122 are equidistantly distributed. Therefore, the first biasing member 121 and the second biasing member 122 can be made to have the same force when the first biasing member 121 and the second biasing member 122 abut on the inner peripheral surface of the guide pipe 6, so that the force of the rotary tool 11 is balanced to ensure that the rotary tool 11 can be in a stable state.

In one embodiment, the first offset member 121 is circumferentially offset from the second offset member 122. For example, the first biasing member 121 is disposed in an opposite direction to the second biasing member 122. Therefore, the first biasing member 121 and the second biasing member 122 can have the same stress environment and can offset each other, thereby ensuring that the rotary tool 11 can be in a stable operation state.

In another embodiment, the first biasing member 121 is provided in two and the second biasing member 122 is provided in one. The three biasing members are circumferentially formed with an angle of 120 ° therebetween, so that the first biasing member 121 and the second biasing member 122 also have a stress environment capable of offsetting each other, thereby ensuring that the rotary tool 11 can be in a stable operation state.

According to the present invention, the biasing mechanism 12 further comprises a plurality of elastic members 2 disposed in the rotary tool 11 through the engaging grooves 21. Preferably, the elastic member 2 is a spring. The free end of each elastic member 2 is fixedly connected to the first end of the second biasing member 122, thereby allowing the second biasing member 122 to move radially inward or radially outward. The contents of which are described below.

According to an embodiment of the present invention, when the elastic member 2 moves radially inward along with the second biasing member 122, the elastic member 2 is in a contracted state and the second biasing member 122 will abut against the inner peripheral surface of the guide tube 6. When the spring 2 moves outwards with the second biasing member 122, the spring 2 is in a resilient state and the second biasing member 122 will return to a position coaxial with the rotating tool 11, thereby facilitating subsequent removal of the crushing unit 1 from the conduit 6.

In one embodiment, the pockets 21 are disposed radially inside the rotary tool 11, and the pockets 21 do not communicate with the cavity 111 of the rotary tool 11. The card slots 21 are provided in plural and in accordance with the number of the elastic members 2. The locking slot 21 can accommodate the elastic member 2 and provide a certain protection function and a certain movement space for the elastic member 2.

According to the present invention, the biasing means 12 further comprises a piston means 3 arranged in the rotary tool 11 through a through slot 31. The piston means 3 extends radially into the chamber 111 of the rotary tool 11 at a first end and is fixedly connected to a second end of the second biasing member 122 at a second end. Thus, the second biasing member 122 can move radially inward or radially outward by the piston mechanism 3. The contents of which are described below.

According to an embodiment of the present invention, the piston mechanism 3 is configured to urge the second biasing member 122 to move radially outward against the elastic force of the elastic member 2 under the action of an external force, so that the second end of the second biasing member 122 abuts against the inner surface of the conduit 6, and the first biasing member 121 abuts against the inner surface of the conduit 6 under the driving of the second biasing member 122. Thereby, the guide tube 6 is expanded radially outward by the first and

second biasing members

121 and 122, so that the rotary driving rotary tool 11 can more easily perform the crushing work of the fixed matter 5 outside the guide tube 6 in the subsequent process. It will be readily appreciated that the external force is applied to the chamber 111 of the rotary tool 11 to urge the first piston portion 32 (described below) within the rotary tool 11 radially outwardly to bring the entire second biasing member 122 radially outwardly into abutment with the inner peripheral surface of the guide tube 6.

It will be readily appreciated that when the external force applied to the piston mechanism 3 is removed, the piston mechanism 3 will be reset by the elastic force of the elastic member 2, thereby urging the second biasing member 122 to be reset to a position coaxial with the rotary tool 11.

In one embodiment, the through slot 31 is disposed radially inside the rotary tool 11, and the through slot 31 communicates with the chamber 111 of the rotary tool 11, thereby facilitating application of an external force to the piston mechanism 3 to urge the second biasing member 122 radially outward.

According to the invention, the piston means 3 comprises a first piston part 32 with a smaller diameter and a second piston part 33 with a larger diameter. That is, the diameter of the second piston portion 33 is larger than the diameter of the first piston portion 32. Further, the outer circumferential surfaces of the first piston portion 32 and the second piston portion 33 are sealingly connected to the inner circumferential surface of the through groove 31, so that the external force can be sufficiently received to overcome the elastic force of the elastic member 2 and urge the second biasing member 122 radially outwardly.

In one embodiment, the first piston portion 32 extends partially from the through slot 31 into the chamber 111 of the rotary tool 11. Thus, when the piston mechanism 3 is subjected to an external force from within the chamber 111 of the rotary tool 11, the first piston portion 32 is able to move from a first position within the chamber 111 to a second position within the through slot 31, thereby urging the second biasing member 122 to move radially outwardly, further urging the first biasing member 121 into abutment with the second biasing member 122 and the inner peripheral surface of the conduit 6.

According to an embodiment of the present invention, a step 311 extending radially outward is formed at the junction of the through groove 31 and the first piston portion 32. The step 311 can limit the moving stroke of the second piston portion 33. Specifically, when the external force applied to the piston mechanism 3 disappears, the piston mechanism 3 will move radially inward by the elastic force of the elastic member 2, and therefore, the second piston portion 33 will abut against the step 311 in the axial direction, thereby limiting the moving stroke of the piston mechanism 3.

Compared with the prior art, the device has smaller integral volume, thereby being more easily inserted into the guide pipe 6 for crushing and removing. In addition, because all pack between the pipe at different levels in the pit shaft has the cement layer, consequently, the utility model discloses an earlier the breakage with remove the outer solid matter 5 of pipe 6 and demolish the mode of pipe 6 again to can satisfy the requirement of operating mode operation in the pit, further realize the work of removing of pipe.

Fig. 3 schematically shows the structure of the first removing unit 4 in the removing device for the catheter according to the present invention. According to the present invention, the removal device for a catheter mainly comprises a first removal unit 4. The first removal unit 4 includes a circulation tool 41 in the form of a cylinder, a perforation tool (not shown), and a packer 42. Wherein perforation tools are provided at both ends of the circulation tool 41 for forming perforations in the conductor tube 6. A packer 42 is provided in the middle of the circulation tool 41 for setting in the conduit 6.

According to one embodiment of the invention, the first removal unit 4 is configured to be lowered into the conduit 6 and, after the solid matter 5 outside the conduit 6 has been broken, first a first perforation 61 and a second perforation 62 spaced apart are made on the shaft of the conduit 6 by means of the perforation tool, then the circulation tool 41 is set in the conduit 6 by means of the packer 42, and finally the second perforation 62 is pumped with fluid by means of the circulation tool 41, so that the broken solid matter 5 is discharged outwards through the first perforation 61.

In one embodiment, the perforation tools include, but are not limited to, jet perforation guns, bullet perforation guns, chemical cutters, mechanical cutters, and plasma cutters. The perforation tool is capable of forming first 61 and second 62 spaced perforations in the conduit 6 to facilitate subsequent removal of solid matter 5 out of the conduit 6.

According to the present invention, the removal device for the catheter mainly comprises a second removal unit (not shown). The second removing unit includes a cutting tool (not shown) and a lifting tool (not shown). The second removal unit is configured to be lowered into the conductor pipe 6 and, after the solid matter 5 outside the conductor pipe 6 has been completely removed, to cut the conductor pipe 6 by means of a cutting tool and then to remove the cut conductor pipe 6 out of the well by means of a hoisting tool.

According to the present invention, in one embodiment, the bearing seat 7 is disposed in both the first biasing member 121 and the second biasing member 122, so as to effectively improve the rotation efficiency of the first biasing member 121 and the second biasing member 122, and further effectively enhance the crushing capability of the solid material 5 outside the conduit 6.

According to a second aspect of the present invention, a method for removing a catheter with a removal device for a catheter as described above is proposed, comprising the following three stages.

The first stage of removing the catheter with the removal device is described below.

First, the crushing unit 1 is lowered into the conduit 6.

Then, an external force is applied to the piston mechanism 3 in the rotary tool 11 to cause the second biasing member 122 to move radially. Specifically, the crushing unit 1 causes the second biasing member 122 to move radially outward against the elastic force of the elastic member 2 by the piston mechanism 3, so that both the first biasing member 121 and the second biasing member 122 abut against the inner circumferential surface of the guide pipe 6. Thereby, the guide tube 6 is expanded radially outward by the first and

second biasing members

121 and 122.

Thereafter, an external force is applied to the rotating tool 11 to cause it to rotate. Specifically, the crushing unit 1 is moved in the circumferential direction by turning the rotary tool 11, thereby causing the first and

second biasing members

121, 122 to move in the circumferential direction. Whereby the first and

second biasing members

121 and 122 break the solid matter 5 outside the duct 6 in its entirety during the rotation.

Finally, the breaking unit 1 is taken out of the duct 6.

The second stage of removing the catheter with the removal device is described below.

First, the first removal unit 4 is lowered into the conduit 6.

Then, the first removing unit 4 forms the first and second perforations 61 and 62 spaced apart in the axial direction of the guide tube 6 by the perforation tool.

The first removal unit 4 then sets the circulation tool 41 in the conduit by means of the packer 42.

Thereafter, fluid is pumped through the circulation means 41 into the second perforations 62, thereby causing the broken up solid matter 5 outside the conduit 6 to be expelled outwardly through the first perforations 61.

Finally, the first removal unit 4 is taken out of the duct 6.

The third stage of removing the catheter with the removal device is described below.

First, the second removal unit is lowered into the conduit 6.

Then, the second removing unit cuts the catheter 6 in the circumferential direction by the cutting tool.

Thereafter, the second removal unit moves the cut catheter 6 out of the well by means of a hoisting tool.

Finally, the second removal unit is taken out of the catheter 6, thereby completing the removal work of the catheter.

The utility model provides a remove device for pipe, it can loop through crushing unit 1, first removal unit 4 and second and remove the unit and realize the work of demolising stage by stage to pipe 6 to can satisfy the requirement of complicated operating mode operation in the pit with the removal work of accomplishing the pipe. In addition, the present invention also performs the crushing operation on the solid matter 5 outside the conduit 6 by the first and

second biasing members

121 and 122, so that the removal operation of the conduit 6 can be more easily performed in the subsequent operation.

The above are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or variations within the scope of the present disclosure, and such changes or variations are intended to be covered by the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A removal device for a catheter, comprising:

a crushing unit (1) for placement into a conduit (6), comprising a rotating tool (11) in the form of a cylinder, and a biasing mechanism (12) arranged on said rotating tool (11), said rotating tool (11) being configured to be rotatable under the influence of an external force so as to cooperate with said biasing mechanism (12) to crush solid matter (5) outside the conduit (6),

a first removal unit (4) for placement into the conduit (6) configured to form perforations in the conduit (6) after the solid matter (5) has been broken up, thereby discharging the solid matter (5) outwards,

-a second removal unit for placing into the duct (6) capable of cutting and removing the duct (6) after the solid matter (5) has been discharged.

2. The removal device for catheters according to claim 1, characterized in that said biasing means (12) comprise a first biasing member (121) and a second biasing member (122) axially alternatively sleeved outside said rotating tool (11), said first biasing member (121) and said second biasing member (122) each being configured in an annular configuration.

3. The removal device for catheters according to claim 2, characterized in that said first offset (121) is circumferentially offset from said second offset (122).

4. The removal device for catheters according to claim 3, characterized in that said biasing means (12) further comprises a plurality of elastic elements (2) arranged inside said rotating tool (11) through a bayonet slot (21), the free end of each of said elastic elements (2) being fixedly connected to the first end of said second biasing element (122).

5. The removal device for catheters according to claim 4, characterized in that said biasing means (12) further comprises piston means (3) arranged in said rotary tool (11) through a through slot (31), said piston means (3) having a first end extending radially into a chamber (111) of said rotary tool (11) and a second end fixedly connected to a second end of said second biasing member (122),

the piston mechanism (3) is configured to urge the second biasing member (122) radially outwardly against the elastic force of the elastic member (2) under the action of an external force, thereby allowing the second end of the second biasing member (122) to abut against the inner surface of the guide tube (6) to expand the guide tube (6) radially outwardly.

6. The removal device for catheters according to claim 5, characterized in that said piston means (3) comprises a first piston portion (32) and a second piston portion (33), wherein the diameter of said second piston portion (33) is larger than the diameter of said first piston portion (32), said first piston portion (32) and said second piston portion (33) each being sealingly connected with the inner peripheral surface of said through slot (31).

7. The removal device for conduits according to claim 6, characterized in that a step (311) extending radially outwards is formed at the junction of the through slot (31) and the first piston portion (32) for limiting the stroke of movement of the second piston portion (33).

8. The removal device for conduits according to claim 7, wherein the first removal unit (4) comprises a circulation tool (41) in the form of a cylinder, perforation tools disposed at both ends of the circulation tool (41), and a packer (42) disposed in the middle of the circulation tool (41), wherein the perforation tools are configured to form first and second perforations (61, 62) spaced apart in the axial direction of the conduit (6).

9. The removal device for a catheter of claim 8, wherein the perforation tool comprises at least one of a jet perforation gun, a bullet perforation gun, a chemical cutter, a mechanical cutter, and a plasma cutter.