CN212296260U

CN212296260U - Underground anti-reverse device

Info

Publication number: CN212296260U
Application number: CN202021010568.9U
Authority: CN
Inventors: 王志亮; 黄壮; 陈锟; 方永; 何宇航; 黄剑; 夏成宇
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-01-05
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to an underground anti-reversion device; belongs to the technical field of oil and gas well drilling. Comprises an outer tube, a sleeve, a guide sleeve, an upper joint and a lower joint; the top connection is installed to the one end screw thread of outer tube, installs center tube A through sleeve and uide bushing screw thread in the inboard outer tube of top connection, has center tube B through supporting disk and bearing movable mounting in the inboard outer tube of end cover, center tube A and center tube B sliding connection, center tube B one end extend to the end cover outer end, extend to the center tube B end screw thread of end cover outer end and install the lower clutch. The anti-reverse device solves the problem that the drilling tool can be reversed under the conditions that the existing high-pressure pump is overloaded during operation or the pressure at the bottom of the well is overlarge through the matching of the connecting pin and the pin hole, so that the structure in the high-pressure pump can be damaged.

Description

Underground anti-reverse device

Technical Field

The utility model relates to an underground anti-reversion device; belongs to the technical field of oil and gas well drilling.

Background

In recent years, with the innovation of technology and the rapid progress of society, the oil exploitation industry in China is developed unprecedentedly, so that the exploitation amount and the exploitation rate of many conventional oil and gas resources are greatly improved, but the quantity of the conventional oil and gas resources is limited, so people have to look to the field of unconventional oil and gas resources. However, due to the extremely high requirements of unconventional oil and gas resources on exploitation equipment and exploitation technology and the complex geological conditions in China, a plurality of technical problems are not solved, so that the exploitation becomes extremely difficult. Moreover, a technical problem generally exists at present: in the drilling process, because the upper drill string and the lower drill string can store energy, when the high-pressure pump is overloaded in operation or the bottom pressure is overlarge, the drill string can suddenly release the stored energy after the operation of the drilling tool is stopped, so that the drilling tool is reversed, and if the problem is not solved, the drill strings can be tripped and the structure of the drilling tool can be damaged due to repeated reversal of the drilling tool; therefore, an anti-reversion device is urgently needed; so as to prevent the drill strings from tripping and avoid damaging the structure of the drill strings.

Disclosure of Invention

The utility model aims to provide a: the anti-reverse device is simple in structure and easy to operate, and can effectively prevent tripping between drill strings under the condition of sudden pump stop or overload and reduce damage to the structure of the anti-reverse device.

The technical scheme of the utility model is that:

an anti-reverse device comprises an outer pipe, a sleeve, a guide sleeve, an upper joint and a lower joint; the method is characterized in that: an upper joint is installed at one end of the outer pipe in a threaded mode, and an end cover is installed at the other end of the outer pipe in a threaded mode; center tube A is installed through sleeve and uide bushing screw thread in the inboard outer tube of top connection, has center tube B through supporting disk and bearing movable mounting in the inboard outer tube of end cover, center tube A and center tube B sliding connection, center tube B one end extend to the end cover outer end, extend to the center tube B end screw thread of end cover outer end and install the lower clutch.

The central tube A is in threaded connection with the guide sleeve, and the guide sleeve is in threaded connection with the sleeve and the outer tube respectively.

The supporting disk is in threaded connection with the outer pipe, and the supporting disk is in sliding connection with the center pipe B.

The central tube A is in a shape of a Chinese character 'zhong', an outer flange A is arranged on the circumference of the central tube A, and pressure transmission holes are uniformly distributed on the circumference of the outer flange A.

Liquid flow holes are uniformly distributed on the circumference of the central pipe A on one side of the outer flange; the liquid flow hole is communicated with a central hole of the central pipe A, and the central hole of the central pipe A is a reducing throttling hole.

A central tube spring is arranged on the circumference of the central tube A on the other side of the outer flange through a spring compression ring; the spring press ring is connected with the central pipe A in a sliding mode.

The inner wall of the outer pipe is provided with an inner flange, assembling holes are correspondingly formed in the circumference of the inner flange and the pressure transfer holes, and connecting pins are arranged in the assembling holes through pin springs.

An outer flange B is arranged on the circumference of the central tube B, and pin holes are formed in the circumference of the outer flange B corresponding to the assembling holes; the connecting pin is intermittently inserted into and connected with the pin hole.

Liquid flow pressure transmission holes are uniformly distributed on the circumference of the central tube B on one side of the outer flange B and are communicated with a central hole of the central tube B, and the central hole of the central tube B is a throttling diameter hole.

The beneficial effects of the utility model reside in that:

the anti-reverse device is simple in structure and good in practicability, and can effectively prevent emergencies through the matching of the connecting pin and the pin hole, and solve the problem that a drilling tool can be reversed under the conditions of overload operation of the existing high-pressure pump or overlarge pressure at the bottom of a well, so that tripping can be generated between drill strings and the problem of damage to the structure of the drilling tool is solved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the outer tube of the present invention;

fig. 3 is a schematic structural view of an outer flange a of the present invention;

fig. 4 is a schematic structural diagram of the center tube B of the present invention.

In the figure: 1. the outer tube, 2, the sleeve, 3, the uide bushing, 4, the top connection, 5, the lower clutch, 6, the end cover, 7, center tube A, 8, outer flange A, 9, pass the pressure hole, 10, the liquid flow hole, 11, the spring clamping ring, 12, the center tube spring, 13, the inner flange, 14, the pilot hole, 15, the connecting pin, 16, the supporting disk, 17, the bearing, 18, center tube B, 19, outer flange B, 20, the cotter hole, 21, the liquid stream passes the pressure hole.

Detailed Description

The anti-reverse device comprises an outer pipe 1, a sleeve 2, a guide sleeve 3, an upper joint 4 and a lower joint 5; an upper joint 4 is installed at one end of the outer pipe 1 through threads, and an end cover 6 is installed at the other end of the outer pipe 1 through threads; a central pipe A7 is installed in the outer pipe 1 on the inner side of the upper joint 4 through the sleeve 2 and the guide sleeve 3 in a threaded mode, the central pipe A7 is connected with the guide sleeve 3 in a threaded mode, and the guide sleeve 3 is connected with the sleeve 2 and the outer pipe 1 in a threaded mode respectively. The central tube A7 is in a shape of Chinese character 'zhong', an outer flange A8 is arranged on the circumference of the central tube A7, and pressure transmission holes (tubes) 9 are uniformly distributed on the circumference of the outer flange A8. Liquid flow holes 10 are uniformly distributed on the circumference of the central pipe A7 on one side of the outer flange A8; the liquid flow hole 10 is communicated with the central hole of the central pipe A7, and the central hole of the central pipe A7 is a reducing orifice.

A central pipe spring 12 is arranged on the circumference of the central pipe A7 on the other side of the outer flange A8 through a spring pressing ring 11; the spring pressing ring 11 is connected with the central pipe A8 in a sliding mode.

An inner flange 13 is arranged on the inner wall of the outer tube 1, an assembly hole 14 is arranged on the circumference of the inner flange 13 corresponding to the pressure transfer hole 9, and a connecting pin 15 is arranged in the assembly hole 14 through a pin spring.

A center pipe B18 is movably installed in the outer pipe 1 on the inner side of the end cover 6 through a support plate 16 and a bearing 17, the support plate 16 is in threaded connection with the outer pipe 1, and the support plate 16 is in sliding connection with a center pipe B18. The center tube B18 is T-shaped; an outer flange B19 is arranged on the circumference of the central pipe B18, and a pin hole 20 is arranged on the circumference of the outer flange B19 corresponding to the assembly hole 14; the connecting pin 15 is intermittently inserted into the pin hole 20. Liquid flow pressure transmission holes 21 are uniformly distributed on the circumference of the central pipe B18 on one side of the outer flange B19, the liquid flow pressure transmission holes 21 are communicated with a central hole of the central pipe B18, and the central hole of the central pipe B18 is a throttling diameter hole.

The center tube A7 is connected with the center tube B18 in a sliding way, one end of the center tube B18 extends to the outer end of the end cover 6, and the lower joint 5 is installed at the end of the center tube B18 which extends to the outer end of the end cover 6 in a threaded way. The central tube B18 and the end cap 6 are provided with sealing rings to ensure sliding seal therebetween.

The anti-reverse device realizes axial limit on a central pipe A7 through the matching of the inner flange 13 and the guide sleeve 3; the central pipe B18 can rotate circumferentially through a bearing 17, and when the anti-reverse device works, the anti-reverse device is connected with a drill string through an upper connector 4 and is connected with a drilling tool through a lower connector 5, and during the working process; drilling fluid enters through the upper connector 4 and then acts on the drilling tool through the guide sleeve 3, the central pipe A7, the central pipe B18 and the lower connector 5, and normal drilling is achieved. The method specifically comprises the following steps: under the normal drilling condition, drilling fluid enters the anti-reverse device through the upper joint 4 under the action of pump pressure, and the central hole of the central pipe A7 is a reducing orifice; the center hole of the center tube B18 is a throttle diameter hole. The pressure boosting effect is achieved, after drilling fluid enters a center hole of the center pipe A7, part of the drilling fluid enters an annular space between the guide sleeve 3 and the outer flange A8 through the fluid flow hole 10, along with continuous entering of the drilling fluid, the drilling fluid presses the connecting pin 15 through the pressure transfer hole 9 to enable the connecting pin 15 to extend out of the assembling hole 14, and the connecting pin 15 presses the pin spring to enable the pin spring to store energy in the process. At the same time; a part of drilling fluid entering a central hole of the center pipe B18 enters an annular space between the support plate 16 and the outer flange B19 through the fluid flow pressure transmission hole 21, so that the center pipe B18 is pressed to move leftwards, in the process, the center pipe B18 pushes the spring pressing ring 11 to move leftwards, and the spring pressing ring 11 simultaneously presses the center pipe spring 12 to store energy; while the center tube B18 moved leftward, the center tube B18 gradually inserted into the center tube a 7; center tube B18 forms a full butt joint with the center tube a7 center hole and the connecting pin 15 is progressively inserted into the pin hole 20 forming an insert connection. The outer pipe 1 drives the central pipe A7 and the central pipe B18 to rotate in the circumferential direction, so that the lower joint 5 drives the drilling tool connected to the lower joint to rotate in the circumferential direction, and normal drilling is realized.

When the pump is suddenly stopped or the drilling tool is overloaded, the bottom hole fluid pressure and the reaction torque act, the drilling tool can reversely rotate, so that the lower joint 5 reversely rotates, the central pipe B18 is driven to reversely rotate, and the upper tool can be damaged; when the anti-reverse device suddenly stops the pump or the drilling tool is overloaded, the connecting pin 15 loses pressure and the pin spring resets; the insertion connection state of the connection pin 15 and the pin hole 20 is released while being acted by the center tube spring 12. The central tube B18 is pushed to move rightwards, so that the reverse rotation of the drilling tool can only drive the central tube B18 to rotate reversely, and the connecting pin 15 loses pressure and the pin spring is reset; the insertion connection state of the connecting pin 15 and the pin hole 20 is released, and at this time, the central tube B18 can only realize idle rotation, so that the problem of damage to the upper tool caused by the overall reverse rotation of the anti-reverse device is effectively prevented, and meanwhile, the economic loss is reduced and the drilling efficiency is improved.

The anti-reverse device is simple in structure and good in practicability, and can effectively prevent emergencies through the matching of the connecting pin 15 and the pin hole 20, so that the problems that a drilling tool is reversed under the conditions of overload operation of the existing high-pressure pump or overlarge pressure at the bottom of a well, tripping is generated between drill strings and the structure of the drilling tool is damaged are solved, and meanwhile, the anti-reverse device has the characteristic of convenience in maintenance or replacement of parts, and has great popularization value on reduction of production cost and improvement of working efficiency.

Claims

1. An anti-reverse device comprises an outer pipe (1), a sleeve (2), a guide sleeve (3), an upper joint (4) and a lower joint (5); the method is characterized in that: an upper joint is installed at one end of the outer pipe (1) in a threaded mode, and an end cover (6) is installed at the other end of the outer pipe (1) in a threaded mode; install center tube A through sleeve (2) and uide bushing (3) screw thread in outer tube (1) of top connection (4) inboard, there are center tube B (18) through supporting disk (16) and bearing (17) movable mounting in outer tube (1) of end cover (6) inboard, center tube A (7) and center tube B (18) sliding connection, center tube B (18) one end extend to end cover (6) outer end, center tube B (18) end screw thread that extends to end cover (6) outer end installs lower clutch (5).

2. An anti-reverse apparatus according to claim 1, characterized in that: the central tube A (7) is in threaded connection with the guide sleeve (3), and the guide sleeve (3) is in threaded connection with the sleeve (2) and the outer tube (1) respectively.

3. An anti-reverse apparatus according to claim 1, characterized in that: the supporting disc (16) is in threaded connection with the outer tube (1), and the supporting disc (16) is in sliding connection with the central tube B (18).

4. An anti-reverse apparatus according to claim 1, characterized in that: the central tube A (7) is in a shape of a Chinese character 'zhong', an outer flange A (8) is arranged on the circumference of the central tube A (7), and pressure transmission holes (9) are uniformly distributed on the circumference of the outer flange A (8).

5. An anti-reverse device according to claim 4, characterized in that: liquid flow holes (10) are uniformly distributed on the circumference of the central pipe A (7) on one side of the outer flange A (8); the liquid flow hole (10) is communicated with a central hole of the central pipe A (7), and the central hole of the central pipe A (7) is a reducing throttling hole.

6. An anti-reverse device according to claim 4, characterized in that: a central pipe spring (12) is arranged on the circumference of the central pipe A (7) on the other side of the outer flange A (8) through a spring pressing ring (11); the spring pressing ring (11) is connected with the central pipe A (7) in a sliding mode.

7. An anti-reverse apparatus according to claim 1, characterized in that: an inner flange (13) is arranged on the inner wall of the outer pipe (1), assembling holes (14) are formed in the circumference of the inner flange (13) corresponding to the pressure transfer holes (9), and connecting pins (15) are arranged in the assembling holes (14) through pin springs.

8. An anti-reverse apparatus according to claim 1, characterized in that: an outer flange B (19) is arranged on the circumference of the central pipe B (18), and pin holes (20) are formed in the circumference of the outer flange B (19) and correspond to the assembling holes (14); the connecting pin (15) is intermittently inserted into and connected with the pin hole (20).

9. An anti-reverse apparatus according to claim 8, wherein: liquid flow pressure transmission holes (21) are uniformly distributed on the circumference of the central pipe B (18) on one side of the outer flange B (19), the liquid flow pressure transmission holes (21) are communicated with a central hole of the central pipe B (18), and the central hole of the central pipe B (18) is a throttling reducing hole.