CN101280674B - Oil well cementing system with inverse squeezing and pouring functions - Google Patents
Oil well cementing system with inverse squeezing and pouring functions Download PDFInfo
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- CN101280674B CN101280674B CN2008101125719A CN200810112571A CN101280674B CN 101280674 B CN101280674 B CN 101280674B CN 2008101125719 A CN2008101125719 A CN 2008101125719A CN 200810112571 A CN200810112571 A CN 200810112571A CN 101280674 B CN101280674 B CN 101280674B
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- oil well
- tieback
- cementing system
- cementing
- well cementing
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Abstract
The invention relates to the technical field of drilling and cementing the oil well, in particular to an oil well cementing system with anti-squeeze function. Aiming at solving the problems of long time and high cost on well cementation in the prior art, which are caused by the oil well leakage, the invention provides an oil well cementing system with anti-squeeze function, which comprises a drill rod, a tieback canister, a liner hanger, a sleeve, a stage cementer and a tail pipe; the upper part of the tieback canister is provided with an anti-squeeze joint which is connected with the tieback canister by a tieback plug and is provided with through holes. The oil well cementing system realizes finishing two techniques with one device, that is, when leakage happens in the process of grouting tail pipe to cement the oil well, the oil well cementing system, as a remedial measure, can achieve the purpose of cementing the leaking well by anti-squeeze grouting; when the failure of the liner hanger occurs, the anti-squeeze joint is taken off and a positive cycle grouting technique is realized; moreover, the oil well cementing system has the advantages of simple structure and convenient construction and is of great economic benefits.
Description
Technical field
The present invention relates to oilwell drilling cementing technology field, be specifically related to a kind of oil well cementing system with inverse squeezing and pouring functions.
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 as 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 seriously cement paste enters 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, free liquid content is big, 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, the working procedure complexity requires height to site tissue and equipment, and 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 methods 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 invention provides a kind of oil well cementing system with inverse squeezing and pouring functions, 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 solution used in the present invention is: a kind of oil well cementing system with inverse squeezing and pouring functions, comprise drilling rod, tieback tube, extension hanger, sleeve pipe, stage cementing device, tail pipe, its special character is: described tieback tube top is provided with anti-shove joint head, and anti-shove joint head is connected with the tieback tube by the tieback plug; Described anti-shove joint head is provided with through hole.
Be provided with the reducing short circuit between above-mentioned anti-shove joint head and the tieback plug.
Above-mentioned 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 as follows:
The present invention can realize that a kind of device finishes two kinds of technologies, 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 direct circulation cementing technology can be realized, and it is simple in structure, easy construction, and have very strong economic benefit.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is done detailed description.
Referring to Fig. 1, the present invention is a kind of oil well cementing system with inverse squeezing and pouring functions, comprise drilling rod 1, tieback tube 2, extension hanger 3, sleeve pipe 4, stage cementing device 5, tail pipe 6, described tieback tube 2 tops are provided with anti-shove joint head 7, and anti-shove joint head 7 is connected with tieback tube 2 by tieback plug 8; Described anti-shove joint head 7 is provided with through hole 9.
Be provided with reducing short circuit 10 between above-mentioned anti-shove joint head 7 and the tieback plug 8.
Above-mentioned tieback plug 8 is provided with sealed groove 11, is provided with the O RunddichtringO in the sealed groove 11.
The specific embodiment of the present invention is in two kinds of situation:
When 1, 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 enter annular space from through hole, from top to bottom the sealing borehole wall;
2, do not have leakage and extension hanger when breaking down when the down-hole, as 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 enter the shaft bottom.
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 had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, 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 (3)
1. oil well cementing system with inverse squeezing and pouring functions, comprise drilling rod, tieback tube, extension hanger, sleeve pipe, stage cementing device, tail pipe, its special character is: described tieback tube top is provided with anti-shove joint head, and anti-shove joint head is connected with the tieback tube by the tieback plug; Described anti-shove joint head is provided with through hole.
2. a kind of oil well cementing system with inverse squeezing and pouring functions according to claim 1 is characterized in that: be provided with the reducing short circuit between described anti-shove joint head and the tieback plug.
3. a kind of oil well cementing system with inverse squeezing and pouring functions according to claim 1 is characterized in that: described 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 |
|---|---|---|---|
| CN2008101125719A CN101280674B (en) | 2008-05-23 | 2008-05-23 | Oil well cementing system with inverse squeezing and pouring functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101125719A CN101280674B (en) | 2008-05-23 | 2008-05-23 | Oil well cementing system with inverse squeezing and pouring functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101280674A CN101280674A (en) | 2008-10-08 |
| CN101280674B true CN101280674B (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101125719A Active CN101280674B (en) | 2008-05-23 | 2008-05-23 | Oil well cementing system with inverse squeezing and pouring functions |
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| CN (1) | CN101280674B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804690B (en) * | 2014-12-30 | 2018-08-21 | 新疆中核天山铀业有限公司 | In-situ leaching process drilling inverse water mud device |
| CN109267943B (en) * | 2017-07-17 | 2021-03-12 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Tieback tubular column |
| CN113803019B (en) * | 2020-06-15 | 2023-04-25 | 中国石油化工股份有限公司 | Well completion method and string for horizontal well |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725507Y (en) * | 2004-09-02 | 2005-09-14 | 中国石油化工股份有限公司 | Mechanical tail pipe suspension apparatus |
| CN201196059Y (en) * | 2008-05-23 | 2009-02-18 | 安东石油技术（集团）有限公司 | Oil well cementing system |
-
2008
- 2008-05-23 CN CN2008101125719A patent/CN101280674B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725507Y (en) * | 2004-09-02 | 2005-09-14 | 中国石油化工股份有限公司 | Mechanical tail pipe suspension apparatus |
| CN201196059Y (en) * | 2008-05-23 | 2009-02-18 | 安东石油技术（集团）有限公司 | Oil well cementing system |
Non-Patent Citations (2)
| Title |
|---|
| 王合林等.潜山井尾管反挤水泥固井工艺.《石油钻采工艺》.1999,第21卷(第3期),第45-48页. * |
| 陈光等.长庆苏25断块低压易漏失气井固井技术.《钻井液与完井液》.2007,第24卷(第2期),第50-52页. * |
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| CN101280674A (en) | 2008-10-08 |
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