CN201050335Y - Self-locking rubber plug combination for well cementing and completion - Google Patents

Self-locking rubber plug combination for well cementing and completion Download PDF

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Publication number
CN201050335Y
CN201050335Y CNU2007201393408U CN200720139340U CN201050335Y CN 201050335 Y CN201050335 Y CN 201050335Y CN U2007201393408 U CNU2007201393408 U CN U2007201393408U CN 200720139340 U CN200720139340 U CN 200720139340U CN 201050335 Y CN201050335 Y CN 201050335Y
Authority
CN
China
Prior art keywords
self
locking
mandrel
plug
rubber
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CNU2007201393408U
Other languages
Chinese (zh)
Inventor
胡国强
翟亚峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Original Assignee
Drilling Technology Research Institute of Xinjiang Petroleum Administration
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 Drilling Technology Research Institute of Xinjiang Petroleum Administration filed Critical Drilling Technology Research Institute of Xinjiang Petroleum Administration
Priority to CNU2007201393408U priority Critical patent/CN201050335Y/en
Application granted granted Critical
Publication of CN201050335Y publication Critical patent/CN201050335Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a self-locking rubber stopper for the cementing completion operation, which is primarily composed of an oil resistant rubber (1), an upper rubber stopper mandrel (2), a sealing element (3), an oil resistant rubber wing group (4), a lower rubber stopper mandrel (5) and a lock bracket. The rubber wing group (4) on the rubber stopper mandrel (5) is adapted with a groove on the surface inside the lock bracket. The utility model is simple in structure, in which the centralization capacity is excellent when the self-locking rubber stopper is in the self-locking with the lock bracket and the self-locking is reliable. The oil resistant rubber wing group is adopted in the self-locking part, so that the elastic-plastic deformation characteristic of rubber can be fully utilized to ensure the reliable sealing between the self-locking rubber stopper and the lock bracket after the self-locking.

Description

A kind of solid completion self-locking plug combination
Technical field
The utility model relates to the solid completion downhole tool of oil gas well, particularly a kind of self-locking plug instrument.
Background technology
The self-locking plug is that the oil gas well is solid, a kind of instrument commonly used in the completion, and its main effect is exactly to be used to replace liquid in the well, and realizes self-locking.Self-locking plug commonly used generally all is to carry out self-locking with opening pawl ring, when the self-locking plug entered lock, opening pawl ring easy deformation misaligned self-locking plug and lock, thereby might cause sealing actual effect between self-locking plug and the lock, thereby reduce cementing quality.
Summary of the invention
For solving above-mentioned self-locking plug seal failure problem, the technical solution adopted in the utility model is for mainly being made up of self-locking plug and lock two parts, wherein self-locking plug assembly mainly is made up of oil resistant rubber 1, top cement plug mandrel 2, seal 3, the oil resistant rubber group wing 4, bottom plug mandrel 5, between top cement plug mandrel 2 and the bottom plug mandrel 5 with being threaded, sulfuration has one group of rubber group wing 4 on the bottom plug mandrel 5, there are two annular grooves top cement plug mandrel 2 lower ends, and seal 3 places in the groove of top cement plug mandrel 2; There is external screw thread the lock lower end, has on its inner peripheral surface and the suitable groove of the self-locking plug mandrel 3 top cement plug group wings.
Advantage of the present utility model is: simple in structure, good to neutrality when self-locking plug and lock carry out self-locking, self-locking is reliable; Adopt the oil resistant rubber group wing from latching segment, the elastic-plastic deformation characteristic that can make full use of rubber guarantees that the sealing between the self-locking plug and lock is reliable after the self-locking.
Description of drawings
Fig. 1 is the utility model self-locking plug structural representation;
Fig. 2 is the utility model lock structural representation;
Fig. 3 is the utility model self-locking plug and lock fit structure schematic diagram.
The specific embodiment
The utility model is described in more detail below in conjunction with accompanying drawing.This modular assembly mainly is made up of self-locking plug and lock two parts, self-locking plug assembly mainly is made up of oil resistant rubber 1, top cement plug mandrel 2, seal 3, the oil resistant rubber group wing 4, bottom plug mandrel 5 as shown in Figure 1, between top cement plug mandrel 2 and the bottom plug mandrel 5 with being threaded, sulfuration has one group of rubber group wing 4 on the bottom plug mandrel 5, there are two annular grooves top cement plug mandrel 2 lower ends, and seal 3 places in the groove of top cement plug mandrel 2.
Have on the lock inner peripheral surface as shown in Figure 2 and the suitable groove of the self-locking plug mandrel 3 top cement plug group wings, there is external screw thread its lower end.
Operating principle of the present utility model: self-locking plug lock is placed in the pipe string down to the precalculated position, pressing down the self-locking plug with displacement fluid makes it descending, when the self-locking plug arrives the lock position, the rubber group wing 4 on its plug mandrel 5 enters in the groove suitable in the lock as shown in Figure 3, its lower end is blocked by the step surface in the lock, stops its continuation descending.When removing the downforce of self-locking plug, the self-locking plug is subjected to the thrust that liquid makes progress, and the oil resistant rubber group wing 4 on the plug mandrel 5 is subjected to stopping of lock inner peripheral surface upper groove end face at this moment, has stoped the self-locking plug up, thereby has reached the purpose of plug self-locking.

Claims (1)

1. solid completion self-locking plug combination, mainly form by self-locking plug assembly and lock, it is characterized in that: self-locking plug assembly mainly is made up of oil resistant rubber (1), top cement plug mandrel (2), seal (3), the oil resistant rubber group wing (4), bottom plug mandrel (5), between top cement plug mandrel (2) and the bottom plug mandrel (5) with being threaded, bottom plug mandrel (5) is gone up sulfuration one group of rubber group wing (4), there are two annular grooves top cement plug mandrel (2) lower end, and seal (3) places in the groove of top cement plug mandrel (2); There is external screw thread the lock lower end, has on its inner peripheral surface and the suitable groove of self-locking plug mandrel (3) the top cement plug group wing (4).
CNU2007201393408U 2007-02-13 2007-02-13 Self-locking rubber plug combination for well cementing and completion Expired - Fee Related CN201050335Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007201393408U CN201050335Y (en) 2007-02-13 2007-02-13 Self-locking rubber plug combination for well cementing and completion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007201393408U CN201050335Y (en) 2007-02-13 2007-02-13 Self-locking rubber plug combination for well cementing and completion

Publications (1)

Publication Number Publication Date
CN201050335Y true CN201050335Y (en) 2008-04-23

Family

ID=39336819

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007201393408U Expired - Fee Related CN201050335Y (en) 2007-02-13 2007-02-13 Self-locking rubber plug combination for well cementing and completion

Country Status (1)

Country Link
CN (1) CN201050335Y (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979821A (en) * 2010-11-13 2011-02-23 中国石油集团西部钻探工程有限公司 Self-locking cementing stopper combination device
CN105756615A (en) * 2014-12-16 2016-07-13 中国石油化工股份有限公司 Rubber plug assembly combining device
CN106837238A (en) * 2016-12-21 2017-06-13 中国石油天然气股份有限公司 A kind of self-locking plug
CN113756588A (en) * 2021-09-30 2021-12-07 中冶建工集团有限公司 Masonry bar planting method free of drilling

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101979821A (en) * 2010-11-13 2011-02-23 中国石油集团西部钻探工程有限公司 Self-locking cementing stopper combination device
CN101979821B (en) * 2010-11-13 2013-11-13 中国石油集团西部钻探工程有限公司 Self-locking cementing stopper combination device
CN105756615A (en) * 2014-12-16 2016-07-13 中国石油化工股份有限公司 Rubber plug assembly combining device
CN105756615B (en) * 2014-12-16 2018-05-29 中国石油化工股份有限公司 Rubber plug component set composite
CN106837238A (en) * 2016-12-21 2017-06-13 中国石油天然气股份有限公司 A kind of self-locking plug
CN106837238B (en) * 2016-12-21 2019-05-07 中国石油天然气股份有限公司 A kind of self-locking rubber plug
CN113756588A (en) * 2021-09-30 2021-12-07 中冶建工集团有限公司 Masonry bar planting method free of drilling

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20081212

Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000

Patentee after: Western Drilling Kelamayi Drilling Technology Institute

Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000

Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration

ASS Succession or assignment of patent right

Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST

Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG

Effective date: 20081212

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080423

Termination date: 20160213