CN107542425A - A kind of selective cementing unit - Google Patents
A kind of selective cementing unit Download PDFInfo
- Publication number
- CN107542425A CN107542425A CN201610479182.4A CN201610479182A CN107542425A CN 107542425 A CN107542425 A CN 107542425A CN 201610479182 A CN201610479182 A CN 201610479182A CN 107542425 A CN107542425 A CN 107542425A
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- payzone
- well
- inner tube
- outer tube
- 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.)
- Pending
Links
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 7
- 239000011083 cement mortar Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000011229 interlayer Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses a kind of selective cementing unit, belongs to well cementation completion tool technical field in oil and gas wells in oil fields engineering.It includes sleeve pipe inner tube 3, sleeve pipe outer tube 4, and its sleeve pipe inner tube 3, the upper end of sleeve pipe outer tube 4 are equipped with upper slider 2 and upper diaphragm valve 1, lower slider 5 and lower diaphragm valve 6 are housed in sleeve pipe inner tube 3, the lower end of sleeve pipe outer tube 4.The present invention uses double-layer sleeve structure, cementing slurry can bypass payzone by sleeve pipe interlayer, realize the purpose for the selectivity well cementation that payzone is not cemented the well, payzone is cemented the well up and down, increase payzone drainage area, avoid injury of the cement mortar to payzone, be advantageous to improve oil gas well production, its technique is simple, workload is small, without construction risk, breaches the implementation bottleneck of existing selective cementing technology.
Description
Technical field
The present invention relates to a kind of selective cementing unit, belongs to well cementation completion tool technical field in oil and gas wells in oil fields engineering.
Background technology
Foreign countries just promote the use of inner tube method in the nineties in last century and realize selectivity well cementation, i.e. payzone section sieve tube completion, and payzone section uses well cementing of cement up and down, and compared with the well cementation of full well, payzone gun perforation process, sand production rate reduces, output increased.Although the technology realizes the technical goal selectively cemented the well, but enforcement difficulty is big, technique is cumbersome, each step is required for calculating precisely, it is more plus uncertain factor, than if desired for quantitative displacing, the underground folding of multiple valves, interior piping tool itself sequence reliability etc., construction risk is both increased, success rate and total completion time can not ensure.
The content of the invention
The present invention provides a kind of selective cementing unit, and technique is simple, and well cementation success rate is high, and well cementation section quality is good.
What the present invention was realized in：The present invention includes sleeve pipe inner tube, sleeve pipe outer tube, and its sleeve pipe inner tube, sleeve pipe outer tube upper end are equipped with upper slider and upper diaphragm valve, lower slider and lower diaphragm valve are housed in sleeve pipe inner tube, sleeve pipe outer tube lower end.The operation principle of the present invention：The present invention is serially connected on well cementing casing pipe post and arrives payzone position down, carry out building the pressure in sleeve pipe first, the upper slider of the present invention and lower isolation volume expansion, well above and below payzone is kept apart, during well cementation, interlayer that cement mortar is flowed between sleeve pipe inner tube, sleeve pipe outer tube from lower part borehole by lower diaphragm valve, around payzone, then top hole is flowed back to by upper diaphragm valve, has been achieved in that the purpose for the selectivity well cementation that payzone is not cemented the well, payzone is cemented the well up and down.The length of the present invention can adjust according to payzone segment length.
The present invention uses double-layer sleeve structure, cementing slurry can bypass payzone by internal and external casing interlayer, realize the purpose selectively cemented the well, increase payzone drainage area, avoid injury of the cement mortar to payzone, be advantageous to improve oil gas well production, its technique is simple, workload is small, without construction risk, breaches the implementation bottleneck of existing selective cementing technology.
Brief description of the drawings
Fig. 1 is structure principle chart of the present invention.
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings：The present invention includes sleeve pipe inner tube 3, sleeve pipe outer tube 4, and its sleeve pipe inner tube 3, the upper end of sleeve pipe outer tube 4 are equipped with upper slider 2 and upper diaphragm valve 1, lower slider 5 and lower diaphragm valve 6 are housed in sleeve pipe inner tube 3, the lower end of sleeve pipe outer tube 4.The operation principle of the present invention：The present invention is serially connected on well cementing casing pipe post and arrives payzone position down, carry out building the pressure in sleeve pipe first, the upper slider 2 and lower slider 5 of the present invention expands, well above and below payzone is kept apart, during well cementation, interlayer that cement mortar is flowed between sleeve pipe inner tube 3, sleeve pipe outer tube 4 from lower part borehole by lower diaphragm valve 6, around payzone, top hole is flowed back to by upper diaphragm valve 1, has been achieved in that the purpose for the selectivity well cementation that payzone is not cemented the well, payzone is cemented the well up and down.The length of the present invention can adjust according to payzone segment length.
The present invention can increase payzone drainage area, avoid injury of the cement mortar to payzone, be advantageous to improve oil gas well production, while payzone still uses cement mortar sealing up and down, it is ensured that interlayer is not altered.The present invention is the development trend of well cementation completion mode, suitable for the well cementation of any oil reservoir, especially suitable for sensible reservoir, fractured reservoir.Present invention process is simple, workload is small, without construction risk, breaches the implementation bottleneck of existing selective cementing technology.
Claims (1)
- A kind of 1. selective cementing unit, including sleeve pipe inner tube (3), sleeve pipe outer tube (4), it is characterized in that being equipped with upper slider (2) and upper diaphragm valve (1) in sleeve pipe inner tube (3), sleeve pipe outer tube (4) upper end, lower slider (5) and lower diaphragm valve (6) are housed in sleeve pipe inner tube (3), sleeve pipe outer tube (4) lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610479182.4A CN107542425A (en) | 2016-06-28 | 2016-06-28 | A kind of selective cementing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610479182.4A CN107542425A (en) | 2016-06-28 | 2016-06-28 | A kind of selective cementing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107542425A true CN107542425A (en) | 2018-01-05 |
Family
ID=60961771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610479182.4A Pending CN107542425A (en) | 2016-06-28 | 2016-06-28 | A kind of selective cementing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542425A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979591A (en) * | 2018-09-14 | 2018-12-11 | 大港油田集团有限责任公司 | A kind of two-tube overflow means |
| CN110439477A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | A kind of double combination casing of plastic mismatch |
| CN112593894A (en) * | 2020-12-24 | 2021-04-02 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
Citations (5)
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|---|---|---|---|---|
| AU4499400A (en) * | 1999-04-30 | 2000-11-17 | Frank's International, Inc. | Method and multi-purpose apparatus for control of fluid in wellbore casing |
| CN101307679A (en) * | 2008-04-15 | 2008-11-19 | 中国石化集团胜利石油管理局石油开发中心 | Thin interlayer steam injection thermal production well mixing-proof well completion process |
| CN201671591U (en) * | 2009-12-18 | 2010-12-15 | 中国石油天然气集团公司 | Concentric tube winding reservoir cementing tool |
| CN104343413A (en) * | 2013-08-09 | 2015-02-11 | 胜利油田胜机石油装备有限公司 | Top well cementation method and device for self-communicated double-process screen pipe |
| CN205858270U (en) * | 2016-06-28 | 2017-01-04 | 胜利油田胜机石油装备有限公司 | A kind of selectivity cementing unit |
-
2016
- 2016-06-28 CN CN201610479182.4A patent/CN107542425A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4499400A (en) * | 1999-04-30 | 2000-11-17 | Frank's International, Inc. | Method and multi-purpose apparatus for control of fluid in wellbore casing |
| CN101307679A (en) * | 2008-04-15 | 2008-11-19 | 中国石化集团胜利石油管理局石油开发中心 | Thin interlayer steam injection thermal production well mixing-proof well completion process |
| CN201671591U (en) * | 2009-12-18 | 2010-12-15 | 中国石油天然气集团公司 | Concentric tube winding reservoir cementing tool |
| CN104343413A (en) * | 2013-08-09 | 2015-02-11 | 胜利油田胜机石油装备有限公司 | Top well cementation method and device for self-communicated double-process screen pipe |
| CN205858270U (en) * | 2016-06-28 | 2017-01-04 | 胜利油田胜机石油装备有限公司 | A kind of selectivity cementing unit |
Non-Patent Citations (1)
| Title |
|---|
| 王建华;刘杰;张进;: "页岩气开发钻完井技术探讨", 探矿工程(岩土钻掘工程), no. 10 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979591A (en) * | 2018-09-14 | 2018-12-11 | 大港油田集团有限责任公司 | A kind of two-tube overflow means |
| CN110439477A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | A kind of double combination casing of plastic mismatch |
| CN110439477B (en) * | 2019-07-18 | 2021-09-28 | 中国石油天然气集团有限公司 | Double-layer combined sleeve with mismatched strength |
| CN112593894A (en) * | 2020-12-24 | 2021-04-02 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
| CN112593894B (en) * | 2020-12-24 | 2022-06-03 | 山西晋城无烟煤矿业集团有限责任公司 | Multi-purpose multi-stage discontinuous well cementation method for preventing pollution of production layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |