CN202469088U - Underground check valve for oil gas drilling - Google Patents

Underground check valve for oil gas drilling Download PDF

Info

Publication number
CN202469088U
CN202469088U CN2012200972654U CN201220097265U CN202469088U CN 202469088 U CN202469088 U CN 202469088U CN 2012200972654 U CN2012200972654 U CN 2012200972654U CN 201220097265 U CN201220097265 U CN 201220097265U CN 202469088 U CN202469088 U CN 202469088U
Authority
CN
China
Prior art keywords
valve
spool
valve core
valve seat
return spring
Prior art date
Application number
CN2012200972654U
Other languages
Chinese (zh)
Inventor
都振川
管志川
蒋莉
李绪锋
刘永旺
燕金华
周继坤
许玉强
玄令超
张洪宁
Original Assignee
中国石油化工股份有限公司
中国石化集团胜利石油管理局钻井工程技术公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国石油化工股份有限公司, 中国石化集团胜利石油管理局钻井工程技术公司 filed Critical 中国石油化工股份有限公司
Priority to CN2012200972654U priority Critical patent/CN202469088U/en
Application granted granted Critical
Publication of CN202469088U publication Critical patent/CN202469088U/en

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Abstract

The utility model relates to underground equipment for oil gas drilling, in particular to an underground check valve for oil gas drilling. The technical scheme is as follows: the underground check valve mainly consists of a valve body, a valve core pressing sleeve, a sealing assembly, a valve core, a return spring and a valve seat, wherein the top and bottom of the valve body are both provided with a connection thread; the outer side of the valve core pressing sleeve is of a trapezoidal thread structure, a runner and a center hole are arranged at the middle of the valve core pressing sleeve, and the valve core pressing sleeve is mounted at the top end of the valve body; the sealing assembly is compacted and positioned in the valve body by the valve core pressing sleeve and matched with the valve core; the valve seat is mounted at the bottom of an inner cavity of the valve body; and the return spring is arranged at the bottom of the valve core and mounted between the valve seat and the valve core. The underground check valve provided by the utility model has the beneficial effects that the return spring is away from a channel of high-speed flowing drilling fluid, and the limiting of the valve core is realized through the match between the upper step surface of the valve seat and the lower step surface of the valve core, thus the overpressure damage of the return spring is prevented, and the working life of the easily-damaged return spring is effectively prolonged.

Description

Oil/gas drilling is used the down-hole safety check

Technical field

The utility model relates to a kind of oil/gas drilling and uses underground equipment, and particularly a kind of oil/gas drilling is used the down-hole safety check, in the oil/gas drilling process, prevent the pit shaft inner fluid along drill string inside to well head backflow.

Background technique

At present, as interior blowout prevention instrument, at normal drilling well circulation time, wash the down-hole safety check open and realize normal circulation by drilling fluid with the down-hole safety check for the situ of drilling well multiselect.In case drilling fluid stops circulation time, automatic, the quick closedown of safety check ability, thus reach the purpose that prevents that the pit shaft inner fluid from refluxing.Guarantee the down-hole safety check safe and reliable with have the key in enough life-spans and be: guarantee that 1. sealing system is reliable; 2. avoid the inner member erosion; 3. safety check switch resetting-mechanism is flexible.

Summary of the invention

The purpose of the utility model is exactly the above-mentioned defective that exists to existing technology; Provide a kind of oil/gas drilling to use the down-hole safety check; Can avoid effectively that the key components and parts erosion is serious, Returnning spring mechanism collapse and sealing are prone to the problem that lost efficacy; And simple in structure, be convenient to manufacturing, installation, maintenance, switch is flexible.

Its technological scheme is: mainly be made up of valve body, spool gland, seal assembly, spool, Returnning spring, valve seat, valve body all has connecting thread up and down, and the spool gland outside is the trapezoidal thread structure; There are runner and center hole in the centre, is installed on the top of valve body, and seal assembly is compressed by the spool gland and is positioned in the valve body; Cooperate with spool; Valve seat is installed on the body cavity bottom, and the bottom of described spool is provided with Returnning spring, and Returnning spring is installed between valve seat and the spool.

Above-mentioned spool by last axle, lower shaft, and conical surface forms, last center hole that is installed on the spool gland is interior, lower shaft is installed in the valve seat, conical surface cooperates with seal assembly.

The beneficial effect of the utility model is: Returnning spring is away from swiftly flowing drilling fluid passage; And realized the spacing of spool through the cooperation of valve seat upside step surface spool leave from office terrace; Prevent the generation of the overvoltage damage of Returnning spring, effectively increased the operating life of easily damaged parts Returnning spring.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is plan views of the valve seat of the utility model;

Among the last figure: valve body 1, spool gland 2, seal assembly 3, spool 4, Returnning spring 5, valve seat 6.

Embodiment

In conjunction with accompanying drawing 1-2, the utility model is done further to describe:

The utility model mainly is made up of valve body 1, spool gland 2, seal assembly 3, spool 4, Returnning spring 5, valve seat 6; Valve body 1 all has connecting thread up and down; Spool gland 2 outsides are the trapezoidal thread structure, and there are runner and center hole in the centre, are installed on the top of valve body 1; Be used to locate seal assembly 3, spool 4 placed in the middle, the drilling fluid flow channels is provided simultaneously; Seal assembly 3 is compressed by spool gland 2 and is positioned in the valve body 1, cooperates with spool 4, and valve seat 6 is installed on valve body 1 intracavity bottom, and the bottom of described spool 4 is provided with Returnning spring 5, and Returnning spring 5 is installed between valve seat 6 and the spool 4.

Wherein, spool 4 by last axle, lower shaft, and conical surface forms, last center hole that is installed on spool gland 2 is interior, lower shaft is installed in the valve seat 6, conical surface cooperates with seal assembly 3.

Basic principle is: when the turn on pump circulation time is carried out on ground; The power of drilling fluid forces spool descending; The Returnning spring pressurized; The conical surface of spool separates with seal assembly, forms the drilling fluid flow channels, and this moment, drilling fluid was through the annular space of annular space, spool and valve body between runner, the spool conical surface and the seal assembly of spool gland and the drilling fluid flow channels normal circulation of valve seat outer end; When the termination of pumping of ground, drilling fluid no longer includes power, Returnning spring provides elastic force to make spool up, the conical surface of spool contacts with seal assembly is tight, the sealing of drilling fluid flow channels, thus realize preventing the purpose of the backflow of drilling fluid.

Claims (2)

1. an oil/gas drilling is used the down-hole safety check; It is characterized in that: mainly form by valve body (1), spool gland (2), seal assembly (3), spool (4), Returnning spring (5), valve seat (6); Valve body (1) all has connecting thread up and down, and spool gland (2) outside is the trapezoidal thread structure, and there are runner and center hole in the centre; Be installed on the top of valve body (1); Seal assembly (3) is compressed by spool gland (2) and is positioned in the valve body (1), cooperates with spool (4), and valve seat (6) is installed on valve body (1) intracavity bottom; The bottom of described spool (4) is provided with Returnning spring (5), and Returnning spring (5) is installed between valve seat (6) and the spool (4).
2. oil/gas drilling according to claim 1 is used the down-hole safety check; It is characterized in that: described spool (4) by last axle, lower shaft, and conical surface form; Last axle is installed in the center hole of spool gland (2), lower shaft is installed in the valve seat (6), and conical surface cooperates with seal assembly (3).
CN2012200972654U 2012-03-15 2012-03-15 Underground check valve for oil gas drilling CN202469088U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012200972654U CN202469088U (en) 2012-03-15 2012-03-15 Underground check valve for oil gas drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012200972654U CN202469088U (en) 2012-03-15 2012-03-15 Underground check valve for oil gas drilling

Publications (1)

Publication Number Publication Date
CN202469088U true CN202469088U (en) 2012-10-03

Family

ID=46917247

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012200972654U CN202469088U (en) 2012-03-15 2012-03-15 Underground check valve for oil gas drilling

Country Status (1)

Country Link
CN (1) CN202469088U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899801A (en) * 2014-04-22 2014-07-02 张筱秋 Perpendicular welding joint copper alloy five-plate flow guiding one-way valve
CN103899797A (en) * 2014-04-22 2014-07-02 张筱秋 Hoop connector six-plate diversion vertical one-way valve made of titanium alloy
CN104989852A (en) * 2015-07-01 2015-10-21 宁波博技机械有限公司 Integrated liquefied gas filling opening (valve) capable of being quickly dismounted inside
CN106917893A (en) * 2015-12-28 2017-07-04 中国石油天然气股份有限公司 One kind blocks pressure valve
CN106949264A (en) * 2016-01-06 2017-07-14 中石化石油工程技术服务有限公司 A kind of underground check-valves

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103899801A (en) * 2014-04-22 2014-07-02 张筱秋 Perpendicular welding joint copper alloy five-plate flow guiding one-way valve
CN103899797A (en) * 2014-04-22 2014-07-02 张筱秋 Hoop connector six-plate diversion vertical one-way valve made of titanium alloy
CN104989852A (en) * 2015-07-01 2015-10-21 宁波博技机械有限公司 Integrated liquefied gas filling opening (valve) capable of being quickly dismounted inside
CN106917893A (en) * 2015-12-28 2017-07-04 中国石油天然气股份有限公司 One kind blocks pressure valve
CN106917893B (en) * 2015-12-28 2019-01-18 中国石油天然气股份有限公司 A kind of blocking pressure valve
CN106949264A (en) * 2016-01-06 2017-07-14 中石化石油工程技术服务有限公司 A kind of underground check-valves
CN106949264B (en) * 2016-01-06 2019-12-13 中石化石油工程技术服务有限公司 Underground check valve

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20150929

Address after: 100728 No. 22 North Street, Chaoyang District, Beijing, Chaoyangmen

Patentee after: Sinopec Corp.

Patentee after: SINOPEC OILFIELD SERVICE CORPORATION

Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No.

Patentee before: Sinopec Corp.

Patentee before: Shengli Petroleum Management Bureau Drilling Engineering Company of China Petrochemical Corporation

C41 Transfer of patent application or patent right or utility model