CN215292423U

CN215292423U - Secondary blowout prevention tool

Info

Publication number: CN215292423U
Application number: CN202120636390.7U
Authority: CN
Inventors: 梁伟成; 梁闯
Original assignee: Liaoning Xinhua Instruments Co ltd
Current assignee: Liaoning Xinhua Instruments Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-12-24
Anticipated expiration: 2031-03-30

Abstract

The utility model relates to a secondary blowout prevention tool, which comprises an upper joint, an outer sleeve, an outer valve, a lower joint and a valve core seat, wherein the upper part of the valve core seat is sleeved with a valve core, the main body of the valve core seat is sleeved with a spring, and the outer valve sleeve is arranged in the outer sleeve and is fixedly connected with the outer valve seat through a second-stage shearing pin; an inner valve and a valve plug are arranged in the outer valve, and the inner valve is sleeved in the outer valve and fixedly connected with the outer valve through a primary shearing pin; the valve plug is connected with an inner hole of the outer valve, a valve ball is arranged between the valve plug and the inner valve, and the valve ball and the inner hole of the inner valve form linear sealing; the lower part of the outer valve is in threaded connection with a clamp spring seat, and a clamp spring is embedded between the clamp spring seat and the outer sleeve; the device can play a role in releasing the packer, can form a well washing channel through action when a well is required to be washed, and simultaneously has the functions of play and lower blowout prevention, so that green operation and construction are guaranteed.

Description

Secondary blowout prevention tool

Technical Field

The utility model relates to an oil well equipment specifically relates to a secondary prevents spouting instrument.

Background

In the oil extraction process of the oil pumping well, the requirements of production safety and production process and the environmental protection law also strictly stipulate that the oil extraction and operation can not influence the environment to cause pollution.

In the prior operation process, the lower part of the lowest stage packer is provided with a plug or a one-way valve, a pipe column provided with the plug can play a role in blowout prevention and can not realize well washing although the pipe column can play a role in blowout prevention and can not play a role in blowout prevention.

Disclosure of Invention

In order to compensate the not enough of above-mentioned prior art, the utility model aims at providing a secondary prevents spouting instrument can play the effect of release packer, can form the well-flushing passageway through the action when needs well-flushing again, still has simultaneously, prevents spouting the effect down, guarantees green operation construction.

The utility model aims at realizing the secondary blowout prevention tool by the following technical proposal, which comprises an upper joint, an outer sleeve, an outer valve, a lower joint and a valve core seat, wherein an inner hole at the lower end of the outer sleeve is connected with the lower joint; the upper portion of the valve core seat is sleeved with a valve core, the main body of the valve core seat is sleeved with a spring, and the technical key points are as follows:

the outer valve sleeve is arranged in the outer sleeve and is fixed through a secondary shearing pin; an inner valve and a valve plug are arranged in the outer valve, and the inner valve is sleeved in the outer valve and fixed through a primary shearing pin; the valve plug is connected with an inner hole of the outer valve, a valve ball is arranged between the valve plug and the inner valve, and the valve ball and the inner hole of the inner valve form linear sealing;

the lower part of the outer valve is in threaded connection with a clamp spring seat, and a clamp spring is embedded between the clamp spring seat and the outer sleeve; the inner hole at the lower part of the outer sleeve is provided with tooth-shaped teeth, and after the clamp spring seat descends, the tooth-shaped teeth on the clamp spring are meshed with the tooth-shaped teeth on the outer sleeve;

the valve core seat is connected with the inner hole of the lower connector, and the valve core is arranged inside the clamp spring seat.

Further, top connection and overcoat internal thread connection, overcoat lower extreme internal thread connection lower clutch, valve core case and lower clutch threaded connection, the flat gasket of hexagonal head bolt fixedly connected with is passed through on valve core case top.

The utility model has the advantages that:

(1) the device is used for preventing oil and water from overflowing from the wellhead in the oil pipe during operation, so that environmental pollution and unnecessary loss are caused, and green and environment-friendly operation construction is guaranteed.

(2) The device has the characteristics of reliable structure, convenient use and the like, and has the biggest characteristic that the device is connected to the lower end of the last-stage packer, so that the device can play a role in releasing the packer, can form a well washing channel through action when a well is required to be washed, and simultaneously has the functions of preventing blowout downwards and ensuring green and environment-friendly operation construction.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The specific names of the structures in fig. 1 are: the valve comprises an upper connector 1, an outer sleeve 2, tooth type teeth II 2-1, a valve plug 3, a valve ball 4, a secondary shearing pin 5, an inner valve 6, an outer valve 7, a primary shearing pin 8, a clamp spring seat 9, a hexagonal bolt 10, a flat gasket 11, a clamp spring 12, tooth type teeth I12-1, a valve core 13, a valve core seat 14, a spring 15 and a lower connector 16.

Detailed Description

Referring to fig. 1, the specific structure of this embodiment is that, the secondary blowout tool includes an upper joint 1, an outer sleeve 2, an outer valve 7, a lower joint 16, and a valve core seat 14, where the upper joint 1 is in threaded connection with the outer sleeve 2, the lower end of the outer sleeve 2 is in threaded connection with the lower joint 16, a valve core 13 is sleeved on the upper portion of the valve core seat 14, and a spring 15 is sleeved on the main body of the valve core seat 14;

the outer valve 7 is arranged in the outer sleeve 2 and is fixedly connected with the outer sleeve 2 through a secondary shearing pin 5; an inner valve 6 and a valve plug 3 are arranged inside the outer valve 7, and the inner valve 6 is sleeved inside the outer valve 7 and is fixedly connected with the outer valve 7 through a primary shearing pin 8; the valve plug 3 is in threaded connection with the outer valve 7, a valve ball 4 is arranged between the valve plug 3 and the inner valve 6, the valve ball 4 is fixed at the upper end of an inner hole of the inner valve 6 by the valve plug 3, and the valve ball 4, the valve plug 3 and the inner hole of the inner valve 6 form linear sealing;

the lower part of the outer valve 7 is in threaded connection with a clamp spring seat 9, and a clamp spring 12 is embedded between the clamp spring seat 9 and the outer sleeve 2; an inner hole at the lower part of the outer sleeve 2 is provided with a tooth-shaped tooth II 2-1, and the tooth-shaped tooth I12-1 on the snap spring 12 is meshed with the tooth-shaped tooth II 2-1 on the outer sleeve 2;

the valve core seat 14 is in threaded connection with the lower joint 16, and the top end of the valve core seat 14 is fixedly connected with a flat gasket 11 through a hexagonal head bolt 10; the upper end of the spring 15 supports the valve core 13, and the lower end supports the valve core seat 14; the valve core 13 is arranged inside the clamp spring seat 9.

The working principle of the utility model is that;

this instrument uses with the packer is supporting, installs the secondary additional at the lower extreme of one-level packer and prevents spouting the instrument, can guarantee all to reach when the packer normally sits to seal and prevent spouting the effect, down to the predetermined position after, suppress in the oil pipe, when releasing the packer, promote one-level deblocking pin 8 of internal valve 6 descendingly and cut, valve ball 4 and internal valve 6 cooperation. The internal valve 6 is closed in forward direction during forward injection, and the internal valve 6 is opened in reverse direction during reverse well flushing. And when the pipe column is lifted, the pipe is continuously pressed, the second-stage unsealing pin 5 is sheared off, and the final valve is closed.

The utility model discloses a work characteristics:

(1) when the well is lowered, the first-level unsealing pin 8 fixes the inner valve 6 on the outer valve 7. The valve plug 3 is in threaded connection with the outer valve 7 to form a line seal with the valve ball 4, and the valve ball 4 and the inner valve 6 form a line seal. The valve plug 3, the valve ball 4 and the internal valve 6 form a plug assembly, so that liquid does not flow out of the oil pipe when the well is lowered.

(2) The secondary blowout prevention tool adopts two-stage deblocking pins, each stage independently works and is sheared, and the shearing of the next-stage deblocking pin is not influenced.

(3) When the oil pipe is lifted, after the oil pipe is internally pressed, the outer valve 7 descends together with the inner valve 6, and the tooth-shaped teeth 12-1 on the snap spring 12 are meshed with the tooth-shaped teeth 2-1 on the outer sleeve 2. The clamp spring seat 12 and the outer valve 7 are connected through threads and synchronously descend, and the spring 13 always props against the valve core 13 through elasticity, so that the clamp spring seat 12 and the valve core 13 form linear sealing.

Claims

1. The secondary blowout prevention tool comprises an upper joint, a jacket, an outer valve, a lower joint and a valve core seat, wherein an inner hole at the lower end of the jacket is connected with the lower joint; the upper portion of the valve core seat is sleeved with the valve core, and the main body of the valve core seat is sleeved with a spring, and the valve core seat is characterized in that: the outer valve sleeve is arranged in the outer sleeve and is fixedly connected with the outer sleeve through a secondary shearing pin; the inner valve is arranged in the outer valve and is fixedly connected with the outer valve through a primary shearing pin; the valve plug is connected with an inner hole of the outer valve, a valve ball is arranged between the valve plug and the inner valve, and the valve ball and the inner hole of the inner valve form linear sealing; the lower part of the outer valve is in threaded connection with a clamp spring seat, a clamp spring is embedded between the clamp spring seat and the outer sleeve, and the clamp spring is provided with tooth-shaped teeth; the inner hole at the lower part of the outer sleeve is provided with tooth-shaped teeth, and after the clamp spring seat descends, the tooth-shaped teeth on the clamp spring are meshed with the tooth-shaped teeth of the inner hole at the lower part of the outer sleeve; the valve core seat is connected with the inner hole of the lower connector, and the valve core is arranged inside the clamp spring seat.

2. The secondary blow out prevention tool of claim 1, wherein: the upper joint is in threaded connection with the outer sleeve, the lower end of the outer sleeve is in threaded connection with the lower joint, the valve core seat is in threaded connection with the lower joint, and the top end of the valve core seat is fixedly connected with a flat gasket through a hexagonal head bolt.