CN219826786U

CN219826786U - Combined one-way valve

Info

Publication number: CN219826786U
Application number: CN202320449783.6U
Authority: CN
Inventors: 赖伟华; 李良辉; 李江平; 庞瑞杰; 周茂勇; 刘建锋; 陈丹霞
Original assignee: Baiqin Energy Technology Huizhou Co ltd
Current assignee: Baiqin Energy Technology Huizhou Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-10-13
Anticipated expiration: 2033-03-09

Abstract

The utility model discloses a composite one-way valve, which comprises a composite ball seat, an upper joint and an outer sleeve, wherein the composite ball seat comprises a ball seat valve, a shearing ring and a leading head, the ball seat valve comprises a valve seat and a one-way valve, a channel is arranged in the valve seat, the one-way valve is arranged in the channel, a boss is arranged on the outer wall ring of the valve seat, the shearing ring is positioned on the boss, the ring width of the shearing ring is larger than the width of the boss, the leading head is sleeved outside the valve seat, and the leading head abuts the shearing ring on the boss; the upper joint is sleeved outside the valve seat, the upper joint is opposite to the guide head, and a shearing groove is formed in the inner wall ring of one end of the upper joint, which faces the guide head; the outer sleeve is sleeved outside the guide head and the upper joint, the part of the shearing ring exceeding the boss is positioned between the upper joint and the shearing groove, and one end of the guide head, which is far away from the ball seat valve, is exposed outside the outer sleeve; the valve seat and the one-way valve are combined, the shearing ring is adopted, the pressure shearing mode is used for enabling the composite ball seat to be separated from the upper joint and the outer sleeve, the drilling and milling procedures are omitted, all the drift diameters of the pipeline can be achieved, and the working efficiency is effectively improved.

Description

Combined one-way valve

Technical Field

The utility model relates to the field of petroleum and natural gas exploration and development, in particular to a composite one-way valve.

Background

In oil exploitation operation, the float shoe and the ball seat nipple are necessary tools for well cementation construction and are connected to a casing. The float shoe is connected with the ball seat nipple separately, and the float shoe is used for guiding the sleeve string to smoothly go down into the well, and the inside check valve structure of float shoe prevents that underground fluid and gas from entering the tubular column inside, after sending the tubular column to the preset position, drops into the sealing ball from the well head, reaches ball seat nipple position through the pumping sealing ball, makes mud circulation channel stifled dying, realizes sealed pressure holding effect.

In the prior art, the floating shoes and the ball seat pup joint are used as two independent tools, the two separate tools are required to be connected, the leakage points of the pipeline are increased along with the increase of the interfaces during installation and connection, and the installation time is prolonged; and the floating shoes and the ball seat nipple joint are required to be drilled and milled by a drilling tool after the completion of the running operation, so that the operation cost is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the composite one-way valve is provided.

In order to achieve the above purpose, the utility model provides a composite one-way valve, which comprises a composite ball seat, an upper joint and an outer sleeve, wherein the composite ball seat comprises a ball seat valve, a shearing ring and a leading head, the ball seat valve comprises a valve seat and a one-way valve, a channel is arranged in the valve seat, the one-way valve is arranged in the channel, a boss is arranged on the outer wall ring of the valve seat, the shearing ring is positioned on the boss, the ring width of the shearing ring is larger than the width of the boss, the leading head is sleeved outside the valve seat, and the leading head abuts the shearing ring on the boss; the upper joint is sleeved outside the valve seat, the upper joint is opposite to the guide head, and a shearing groove is formed in the inner wall ring of one end of the upper joint, which faces the guide head; the outer sleeve is sleeved outside the guide head and the upper joint, the part of the shearing ring exceeding the boss is positioned between the upper joint and the shearing groove, and one end of the guide head, which is far away from the ball seat valve, is exposed outside the outer sleeve.

According to one embodiment of the utility model, the valve seat comprises a ball seat and a one-way valve seat, the ball seat and the one-way valve seat are integrally formed, the boss is annularly arranged at one end of the ball seat close to the one-way valve seat, the upper joint sleeve is arranged outside the ball seat, the guide head sleeve is arranged outside the one-way valve seat, the outer diameter of the ball seat is larger than that of the one-way valve seat, the channel is arranged in the ball seat and the one-way valve seat in a penetrating manner, and the one-way valve is arranged in the one-way valve seat.

According to an embodiment of the utility model, the sealing ball is inserted into the channel, and the sealing ball seals the channel.

According to an embodiment of the present utility model, the inner surface of the ball seat is tapered, and the inner diameter of the ball seat is gradually reduced in a direction gradually approaching the one-way valve seat.

According to one embodiment of the utility model, the one-way valve comprises a mounting seat, a plug and a spring, wherein the mounting seat is clamped and fixed at one end of the one-way valve seat, the mounting seat is provided with a plurality of round holes, one end of the plug is inserted into the mounting seat, one end of the plug is abutted against the channel, and the spring is wound around the plug.

According to one embodiment of the utility model, the guide head comprises a cylinder and a head, wherein the head is arranged at one end of the cylinder, the head is leaked outside the outer sleeve, and the head is hemispherical or semi-elliptical; the head is provided with a plurality of overflow holes which are communicated with the inside of the cylinder.

According to one embodiment of the utility model, the fixing structure comprises a groove, a fixing hole and a fastening screw, wherein the groove is annularly arranged on the outer wall of the upper joint, the fixing hole is arranged on the outer sleeve, the fixing hole is opposite to the groove when the upper joint is connected with the outer sleeve, the fastening screw penetrates into the fixing hole, and one end of the fastening screw stretches into the groove.

According to one embodiment of the utility model, the sealing device further comprises a sealing ring, the sealing groove is formed in the outer wall of the upper joint in a surrounding mode, and the sealing ring is located in the sealing groove.

According to one embodiment of the utility model, the sealing ball, the valve seat, the plug, the mounting seat and the guide head are all made of soluble magnesium-aluminum alloy materials.

According to one embodiment of the utility model, the composite tee, upper joint and outer sleeve have the same central axis.

The utility model has the beneficial effects that the ball seat and the one-way valve seat are integrally formed, the risk of connecting leakage points is reduced, and the shearing ring is adopted to separate the composite ball seat from the upper joint and the outer sleeve in a pressure shearing mode, so that the drilling and milling process is avoided, and the working efficiency is effectively improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a perspective view of a composite check valve in an embodiment;

FIG. 2 is a cross-sectional view of a composite check valve in an embodiment;

fig. 3 is an enlarged view of a portion a in the embodiment;

FIG. 4 is a cross-sectional view of a valve seat in an embodiment;

FIG. 5 is an exploded view of the composite check valve in an embodiment;

fig. 6 is an enlarged view of part B in the embodiment;

fig. 7 is an enlarged view of a portion C in the embodiment.

Description of the reference numerals

1-a composite tee; 2-upper joint; 3-an outer sleeve; 4-a sealing ball; 5-a fixed structure; 6, a sealing ring; 11-ball seat valve; 12-a shear ring; 13-leading; 21-cutting slots; 22-sealing the groove; 51-groove; 52-fixing holes; 53-fastening screws; 111-valve seat; 112-a one-way valve; 131-a cylinder; 132-head; 1111-channel; 1112-boss; 1113-tee; 1114—one-way valve seat; 1121—a mount; 1122-a plug; 1123-a spring; 1321-overflow aperture; 11211-round holes.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The present embodiment provides a composite check valve, please refer to fig. 1, 2 and 3, wherein fig. 1 is a perspective view of the composite check valve, fig. 2 is a cross-sectional view of the composite check valve, and fig. 3 is an enlarged view of a portion a. The compound check valve in this embodiment includes compound ball seat 1, top connection 2 and outer sleeve 3, and in this embodiment, top connection 2 inside cavity, compound ball seat 1 is connected with top connection 2, and compound ball seat 1's inside is linked together with top connection 2's inside, and compound ball seat 1 is located with top connection 2 outside to outer sleeve 3 cover.

The composite ball seat 1 comprises a ball seat valve 11, a shearing ring 12 and a leading head 13, the ball seat valve 11 comprises a valve seat 111 and a one-way valve 112, a channel 1111 is arranged in the valve seat 111, the channel 1111 is communicated with the inside of the upper joint 2, and the one-way valve 112 is arranged in the channel 1111. The outer wall of the valve seat 111 is annularly provided with a boss 1112, the shearing ring 12 is positioned on the boss 1112, the ring width of the shearing ring 12 is larger than the width of the boss 1112, the leading head 13 is sleeved outside the valve seat 111, and the leading head 13 abuts the shearing ring 12 on the boss 1112; the upper joint 2 is sleeved outside the valve seat 111, and the upper joint 2 is opposite to the guide head 13. In this embodiment, the valve seat 111 is connected to one end of the upper joint 2, and is delimited by the boss 1112, one end of the valve seat 111 is located in the upper joint 2, the other end of the valve seat is leaked outside the upper joint 2, and the shear ring 12 is located on the boss 1112, so that the shear ring 12 is disposed around the valve seat 111. The guide head 13 is sleeved at one end of the ball seat valve 11 exposed out of the upper joint 2, threads are arranged at the joint of the valve seat 111 and the guide head 13, the valve seat 111 is fixedly connected with the guide head 13 through the threads, the shearing ring 12 is abutted to the boss 1112 at one end of the guide head 13 close to the upper joint 2, and the upper joint 2 and the guide head 13 are oppositely arranged.

With continued reference to fig. 2 and 3, a shear groove 21 is formed in the inner ring of the end of the upper joint 2 facing the guide head 13, the outer sleeve 3 is sleeved outside the guide head 13 and the upper joint 2, the part of the shear ring 12 beyond the boss 1112 is located between the upper joint 2 and the shear groove 21, and the end of the guide head 13 far away from the ball seat valve 11 is exposed outside the outer sleeve 3.

In this embodiment, the outer sleeve 3 is sleeved outside the leading head 13 and the upper joint 2, so that the surface of the whole composite check valve is smooth, and the lower operation is facilitated. The part of the shear ring 12 beyond the boss 1112 extends into the shear groove 21, that is, the shear ring 12 is located between the boss 1112 and the shear groove 21, the inner wall of the shear ring 12 abuts against the valve seat 111, and the outer wall of the shear ring 12 abuts against the upper joint 2, so that tension is formed, and the ball seat valve 11 and the guide head 13 are fixedly connected to the upper joint 2. After the composite one-way valve finishes the running operation, the set pressure is injected into the connected tubular column, the shearing ring 12 is sheared by the pressure, the ball seat valve 11 is separated from the upper joint 2, the whole ball seat valve 11 and the leading head 13 drop into the bottom of the well, and the purpose that all the drift diameters of the oil pipe can be recovered without drilling and milling is achieved.

Referring to fig. 4, fig. 4 is a cross-sectional view of a valve seat, the valve seat 111 includes a ball seat 1113 and a one-way valve seat 1114, the ball seat 1113 and the one-way valve seat 1114 are integrally formed, a boss 1112 is annularly arranged at one end of the ball seat 1113 close to the one-way valve seat 1114, an upper joint 2 is sleeved outside the ball seat 1113, a guide head 13 is sleeved outside the one-way valve seat 1114, and the outer diameter of the ball seat 1113 is larger than the outer diameter of the one-way valve seat 1114; in this embodiment, with the boss 1112 as a parting line, one end of the valve seat 111 close to the upper joint 2 is a ball seat 1113, one end of the valve seat 111 close to the leading head 13 is a one-way valve seat 1114, and when the composite ball seat 1 is connected with the upper joint 2, the ball seat 1113 is located in the upper joint 2, and the one-way valve seat 1114 is located in the leading head 13.

The passage 1111 extends through the ball seat 1113 and the check valve seat 1114 to communicate the two, and the check valve 112 is disposed within the check valve seat 1114.

The composite check valve in this embodiment further includes a sealing ball 4, and the sealing ball 4 is put into the channel 1111 to seal the channel 1111, so that the composite check valve can be pressed down at the wellhead.

The inner surface of the ball seat 1113 is tapered, and the inner diameter of the ball seat 1113 gradually decreases in a direction gradually approaching the check valve seat 1114; the diameter of the end of the ball seat 1113 adjacent to the one-way valve seat 1114 is smaller than the diameter of the sealing ball 4. When the sealing ball 4 is plunged into the tee 1113, the sealing ball 4 seals the channel 1111.

Referring to fig. 5, fig. 5 is an exploded view of the composite check valve. To achieve the unidirectional overcurrent effect, the unidirectional valve 112 includes a mounting seat 1121, a plug 1122 and a spring 1123, the mounting seat 1121 is clamped and fixed at one end of the unidirectional valve seat 1114, a plurality of round holes 11211 are formed in the mounting seat 1121, one end of the plug 1122 is inserted into the mounting seat 1121, the other end of the plug 1122 is abutted to the channel 1111, and the spring 1123 is wound around the plug 1122. During well flushing operation, liquid flows in from the upper joint 2, the hydraulic pressure pushes the plug 1122 in a direction away from the upper joint 2, at this time, the spring 1123 is compressed toward the mounting seat 1121, and the plug 1122 is out of contact with the channel 1111, so that the liquid flows in from the channel 1111 and flows out through the plurality of round holes 11211. The check valve 112 prevents backflow of water and mud in the well while preventing blowout during the down-hole process.

With continued reference to fig. 5, the leading head 13 includes a cylinder 131 and a head 132, the head 132 is disposed at one end of the cylinder 131, the head 132 is leaked outside the outer sleeve 3, and the head 132 is hemispherical or semi-elliptical; the head 132 is provided with a plurality of overflow holes 1321, the plurality of overflow holes 1321 are communicated with the inside of the cylinder 131, the overflow holes 1321 enable liquid to flow out, foreign matters can be prevented from entering the check valve 112, and the hemispherical or semi-elliptical structure of the head 132 enables the composite check valve to have certain buoyancy.

Referring to fig. 6, fig. 6 is an enlarged view of a portion B. The upper connector 2 is fixedly connected with the outer sleeve 3, the composite one-way valve further comprises a fixing structure 5, the fixing structure 5 comprises a groove 51, a fixing hole 52 and a fastening screw 53, the groove 51 is annularly arranged on the outer wall of the upper connector 2, the fixing hole 52 is arranged on the outer sleeve 3, when the upper connector 2 is connected with the outer sleeve 3, the fixing hole 52 is opposite to the groove 51, the fastening screw 53 penetrates into the fixing hole 52, and one end of the fastening screw 53 stretches into the groove 51. In this embodiment, the groove 51 is annularly disposed on the outer wall of the end, connected to the upper joint 2 and the outer sleeve 3, of the upper joint 2, the number of the fixing holes 52 and the fastening screws 53 is 4, the 4 fixing holes 52 are uniformly distributed on the outer sleeve 3 and are connected to the end, connected to the upper joint 2, of the outer sleeve 3, when the fixing holes 52 and the groove 51 are oppositely disposed, the 4 fastening screws 53 are respectively disposed in the 4 fixing holes 52 in a penetrating manner, and the end 52 of each fastening screw extends into the groove 51 and abuts against the groove 51, so that the upper joint 2 is fastened to the outer sleeve 3, and the risk that the outer sleeve 3 falls off from the upper joint 2 is reduced.

Referring to fig. 7, fig. 6 is an enlarged view of a portion C. The compound check valve of this embodiment still includes sealing washer 6, and the outer wall ring of top connection 2 is equipped with seal groove 22, and sealing washer 6 is located seal groove 22. In this embodiment, the number of sealing rings 6 and sealing grooves 22 is 2, two sealing grooves 22 are annularly arranged at one end of the upper joint 2 connected with the outer sleeve 3, and two sealing rings 6 are respectively positioned in the sealing grooves 22. The sealing ring 6 is used for preventing liquid leakage or seepage at the joint of the upper joint 2 and the outer sleeve 3.

In addition, the sealing ball 4, the valve seat 111, the mounting seat 1121, the plug 1122 and the leading head 13 are all made of magnesium-aluminum alloy materials, after the shearing ring 12 is sheared, the whole ball seat valve 11 and the leading head 13 fall into the bottom of the well, and under the chlorine radical solution with certain temperature and concentration, the sealing ball 4, the valve seat 111, the mounting seat 1121, the plug 1122 and the leading head 13 are completely dissolved, so that the bottom of the well space is not occupied, and in the later secondary exploitation, the salvaging is not needed, and the operation cost is saved.

The central axes of the composite ball seat 1, the upper joint 2 and the outer sleeve 3 are the same, so that the composite check valve is convenient to drop.

In the process of casing running, the leading head 13 is used for guiding the casing string to smoothly run into the well bore, and meanwhile the situation that the composite check valve is damaged due to scratch of the well wall and rock in the process of casing running is avoided. The check valve 112 can be used for forward well flushing, and can also prevent blowout, and prevent water and mud from being guided into the casing string during the well running process; when the casing string is lowered to a preset position in the well, the sealing ball 4 is led into the valve seat 111 from the wellhead along the pipe body, the channel 1111 is sealed, and then the set pressure is injected from the wellhead to build pressure in the casing. After the pressure is suppressed to a certain value, the shearing ring 12 is sheared by the pressure, the composite ball seat 1 is separated from the connection of the upper joint 2 and the outer sleeve 3 and falls to the bottom of the well, and at the moment, the drift diameter of the pipeline is restored to the maximum, so that the subsequent operation efficiency is improved. The dropped sealing ball 4, the leading head 13, the valve seat 111, the mounting seat 1121 and the plug 1122 are all made of magnesium-aluminum alloy materials, and are completely dissolved by chlorine radical solution reaching a certain temperature and concentration at the bottom of the well after dropping, so that salvaging is not needed in secondary exploitation, and the operation cost is saved.

The foregoing description is only illustrative of the utility model and is not to be construed as limiting the utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims

1. The utility model provides a combined type check valve, its characterized in that includes compound ball seat (1), top connection (2) and outer sleeve (3), compound ball seat (1) include ball seat valve (11), shearing ring (12) and guide head (13), ball seat valve (11) include disk seat (111) and check valve (112), be equipped with passageway (1111) in disk seat (111), check valve (112) are located in passageway (1111), the outer wall ring of disk seat (111) is equipped with boss (1112), shearing ring (12) are located on boss (1112), the ring width of shearing ring (12) is greater than the width of boss (1112), guide head (13) cover is located outside disk seat (111), just guide head (13) will shearing ring (12) butt on boss (1112); the upper joint (2) is sleeved outside the valve seat (111), the upper joint (2) is opposite to the guide head (13), and a shearing groove (21) is formed in the inner wall of one end, facing the guide head (13), of the upper joint (2); the outer sleeve (3) is sleeved outside the leading head (13) and the upper joint (2), the part of the shearing ring (12) exceeding the boss (1112) is positioned between the upper joint (2) and the shearing groove (21), and one end of the leading head (13) away from the ball seat valve (11) is exposed outside the outer sleeve (3).

2. The composite one-way valve according to claim 1, wherein the valve seat (111) comprises a ball seat (1113) and a one-way valve seat (1114), the ball seat (1113) and the one-way valve seat (1114) are integrally formed, the boss (1112) is arranged at one end of the ball seat (1113) close to the one-way valve seat (1114), the upper joint (2) is sleeved outside the ball seat (1113), the leading head (13) is sleeved outside the one-way valve seat (1114), the outer diameter of the ball seat (1113) is larger than the outer diameter of the one-way valve seat (1114), the channel (1111) is arranged in the ball seat (1113) and the one-way valve seat (1114) in a penetrating manner, and the one-way valve (112) is arranged in the one-way valve seat (1114).

3. A composite check valve according to claim 2, further comprising a sealing ball (4), said sealing ball (4) being thrown into said channel (1111), said sealing ball (4) sealing said channel (1111).

4. The composite check valve according to claim 2, wherein an inner surface of the ball seat (1113) is tapered, and an inner diameter of the ball seat (1113) is gradually reduced in a direction gradually approaching the check valve seat (1114).

5. The composite check valve according to claim 3, wherein the check valve (112) comprises a mounting seat (1121), a plug (1122) and a spring (1123), the mounting seat (1121) is clamped and fixed at one end of the check valve seat (1114), the mounting seat (1121) is provided with a plurality of round holes (11211), one end of the plug (1122) is inserted into the mounting seat (1121), the other end of the plug (1122) is abutted to the channel (1111), and the spring (1123) is wound around the plug (1122).

6. The composite one-way valve according to claim 1, wherein the leading head (13) comprises a cylinder (131) and a head (132), the head (132) is arranged at one end of the cylinder (131), the head (132) leaks out of the outer sleeve (3), and the head (132) is hemispherical or semi-elliptical; the head (132) is provided with a plurality of overflow holes (1321), and the overflow holes (1321) are communicated with the inside of the cylinder (131).

7. The composite check valve according to claim 1, further comprising a fixing structure (5), wherein the fixing structure (5) comprises a groove (51), a fixing hole (52) and a fastening screw (53), the groove (51) is annularly arranged on the outer wall of the upper joint (2), the fixing hole (52) is arranged on the outer sleeve (3), the fixing hole (52) is opposite to the groove (51) when the upper joint (2) is connected with the outer sleeve (3), the fastening screw (53) penetrates into the fixing hole (52), and one end of the fastening screw (53) stretches into the groove (51).

8. The composite check valve according to claim 1, further comprising a sealing ring (6), wherein a sealing groove (22) is annularly arranged on the outer wall of the upper joint (2), and the sealing ring (6) is located in the sealing groove (22).

9. The composite check valve according to claim 5, wherein the sealing ball (4), the valve seat (111), the mounting seat (1121), the plug (1122) and the nipple (13) are all made of a soluble magnesium aluminum alloy material.

10. A composite check valve according to claim 1, characterized in that the central axis of the composite ball seat (1), the upper joint (2) and the outer sleeve (3) are identical.