CN101319604B - Inverse squeezing tie-back sealing plug - Google Patents
Inverse squeezing tie-back sealing plug Download PDFInfo
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- CN101319604B CN101319604B CN2008101125723A CN200810112572A CN101319604B CN 101319604 B CN101319604 B CN 101319604B CN 2008101125723 A CN2008101125723 A CN 2008101125723A CN 200810112572 A CN200810112572 A CN 200810112572A CN 101319604 B CN101319604 B CN 101319604B
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- backward extrusion
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- cement
- cementing
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Abstract
The invention relates to the technical field of oil well drilling and cementing, in particular to a backward extrusion tied-back sealing plug used for oil well cementing. To overcome the problems of long well cementing time and high cost produced by oil well leakage in the prior art, the invention provides a backward extrusion tied-back sealing plug used for oil well cementing which comprises a backward extrusion plug, a tapered sub and a tied-back plug; the tapered sub connects the backward extrusion plug and the tied-back plug; the backward extrusion plug is provided with a through hole; the tied-back plug is provided with a seal groove; the seal groove is provided with an O-shaped gasket. The invention realize two processes with one device, i.e. the invention can be taken as a remedial measure after the cement injected into a stern tube for well cementing is leaked for backward extrusion of the cement so as to cement the leakage wells; and when a tail tube hanger fails to work, the backward extrusion plug can be taken out to realize the positive circulation cement injection process; in addition, the plug has simple structure, is convenient in construction and has very good economic benefit.
Description
Technical field
The present invention relates to oilwell drilling cementing technology field, be specifically related to a kind of inverse squeezing tie-back sealing plug.
Background technology
In oilfield explorating developing process, one of the biggest problem that often runs into is a down-hole leakage problem, during the absorption well well cementation; Imappropriate like technical measures; Cement paste leakage will take place in the cementing operation process, causes low the returning of cement paste and does not reach Geological Engineering requirement, oil, gas, effectively packing of water layer; Inter-layer fluid is scurried mutually, can't carry out well stimulations such as normal oil-gas mining and acid fracturing.More serious is that cement paste gets into payzone in a large number, will stop up (or permanent obstruction) gas channel, and oil-gas Layer is caused great infringement, oil well productivity is reduced, even cause scrapping of oil gas well.So, say that to a certain extent the success or failure of absorption well well cementation not only can influence the oil gas well capacity, and will be related to the exploitation of oil gas and the discovery of new oil gas field.
The thinking that solves the well cementation leakage normally reduces the casing annulus equal yield density, makes it be lower than formation fracture pressure, and the method that is adopted has low-density cement mortar well cementation, stage cementing well cementation etc.It is more general that the cementing method of low-density cement mortar is used; But there are many deficiencies in the research of low-density cement mortar and application: the mortar architecture poor stability, and free liquid content is big, and fluid loss is big; Compressive strength is lower; And along with the further reduction of cement slurry density, this limitation is more and more outstanding, and the reliability with stimulation work such as later stage acid fracturing is reduced; The well cementation of employing stage cementing, working procedure is complicated, and high to site tissue and equipment requirements, construction risk is bigger, and all there is the problem that the well cementation time is long, expense is high in these two kinds of method well cementation.
Summary of the invention
In order to overcome in the prior art for solving the problem that the well cementation time is long, expense is high that the oil well leakage produces; The present invention provides a kind of inverse squeezing tie-back sealing plug; Both can be implemented in and carried out the direct circulation cementing job when extension hanger breaks down; Can when leakage takes place in the drilling liner cementing cementing, carry out the anti-cement squeeze work of annular space again simultaneously.
The technical scheme that the present invention adopts is: a kind of inverse squeezing tie-back sealing plug, comprise anti-shove joint head, reducing pipe nipple, tieback plug, and the reducing pipe nipple couples together anti-shove joint head and tieback plug; Said anti-shove joint head is provided with through hole; Said tieback plug is provided with sealed groove, is provided with the O RunddichtringO in the sealed groove.
Compared with prior art, advantage of the present invention is following:
The present invention can realize two kinds of technologies of a kind of device completion; Remedial measure after missing during promptly as the drilling liner cementing cementing can realize that anti-squeezing off plays the purpose of absorption well well cementation, and extension hanger is when breaking down; Anti-shove joint head is taken off and can realize direct circulation cementing technology; And it is simple in structure, and easy construction has very strong economic benefit.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is done detailed description.
Referring to Fig. 1, the present invention is a kind of inverse squeezing tie-back sealing plug, comprises anti-shove joint head 1, reducing pipe nipple 2, tieback plug 3, and reducing pipe nipple 2 couples together anti-shove joint head 1 with tieback plug 3; Said anti-shove joint head 1 is provided with through hole 4; Said tieback plug is provided with sealed groove 5, is provided with the O RunddichtringO in the sealed groove.
The specific embodiment of the present invention is divided two kinds of situation:
1, do not have leakage and extension hanger when breaking down when the down-hole, like the tieback assembly seal failure, anti-shove joint head is backed out, the remaining part of plug inserts in the extension hanger tieback tube, realizes tieback and sealing, and cement still can direct circulation get into the shaft bottom;
When 2, leakage takes place in the drilling liner cementing cementing, cause oil reservoir to lose envelope, adopt anti-squeezing off technology, will instead squeeze the tieback sealing plug and insert in the tieback tube, after the pitching, cement can only get into annular space from through hole, from top to bottom the sealing borehole wall.
Simple in structure, the easy construction of the present invention, a device can be realized two kinds of functions, has very strong economic benefit.
Should be noted that; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. inverse squeezing tie-back sealing plug, it is characterized in that: comprise anti-shove joint head, reducing pipe nipple, tieback plug, the reducing pipe nipple couples together anti-shove joint head and tieback plug; Said anti-shove joint head is provided with through hole; Said tieback plug is provided with sealed groove, is provided with the O RunddichtringO in the sealed groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101125723A CN101319604B (en) | 2008-05-23 | 2008-05-23 | Inverse squeezing tie-back sealing plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101125723A CN101319604B (en) | 2008-05-23 | 2008-05-23 | Inverse squeezing tie-back sealing plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319604A CN101319604A (en) | 2008-12-10 |
| CN101319604B true CN101319604B (en) | 2012-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101125723A Active CN101319604B (en) | 2008-05-23 | 2008-05-23 | Inverse squeezing tie-back sealing plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101319604B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120071A (en) * | 2016-02-25 | 2017-09-01 | 中国石油化工股份有限公司 | Tieback plug |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120080B (en) * | 2016-02-25 | 2019-07-09 | 中国石油化工股份有限公司 | Tieback assembly |
| CN107120092A (en) * | 2016-02-25 | 2017-09-01 | 中国石油化工股份有限公司 | Tail pipe remedies cementing method and its tieback assembly |
| CN107120091A (en) * | 2016-02-25 | 2017-09-01 | 中国石油化工股份有限公司 | Tieback assembly |
| CN107227943B (en) * | 2017-07-21 | 2023-07-28 | 中国石油天然气集团有限公司 | Tieback insertion cementing assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2182876Y (en) * | 1994-04-05 | 1994-11-16 | 新疆石油管理局钻井公司 | Conjunction head for two stage cementing |
| EP0870898A1 (en) * | 1997-04-09 | 1998-10-14 | Soletanche Bachy France | Method for injection treatment of a formation of little deformability and sleeve for use with the method |
| CN201196058Y (en) * | 2008-05-23 | 2009-02-18 | 安东石油技术（集团）有限公司 | Inverted-extrusion tie-back seal plug used for oil well cementing |
-
2008
- 2008-05-23 CN CN2008101125723A patent/CN101319604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2182876Y (en) * | 1994-04-05 | 1994-11-16 | 新疆石油管理局钻井公司 | Conjunction head for two stage cementing |
| EP0870898A1 (en) * | 1997-04-09 | 1998-10-14 | Soletanche Bachy France | Method for injection treatment of a formation of little deformability and sleeve for use with the method |
| CN201196058Y (en) * | 2008-05-23 | 2009-02-18 | 安东石油技术（集团）有限公司 | Inverted-extrusion tie-back seal plug used for oil well cementing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120071A (en) * | 2016-02-25 | 2017-09-01 | 中国石油化工股份有限公司 | Tieback plug |
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| Publication number | Publication date |
|---|---|
| CN101319604A (en) | 2008-12-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20081210 Assignee: Tianjin An Dong petroleum machinery Manufacturing Co., Ltd Assignor: Anton Oilfield Services (Group) Ltd. Contract record no.: 2014990000952 Denomination of invention: Inverse squeezing tie-back sealing plug Granted publication date: 20120822 License type: Exclusive License Record date: 20141224 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |