CN2509317Y - Cementing rubber plug for oil well plugging operation - Google Patents
Cementing rubber plug for oil well plugging operation Download PDFInfo
- Publication number
- CN2509317Y CN2509317Y CN 01251139 CN01251139U CN2509317Y CN 2509317 Y CN2509317 Y CN 2509317Y CN 01251139 CN01251139 CN 01251139 CN 01251139 U CN01251139 U CN 01251139U CN 2509317 Y CN2509317 Y CN 2509317Y
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- China
- Prior art keywords
- valve
- oil well
- oil
- utility
- cementing
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- 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
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Abstract
The utility model relates to a cementing rubber plug for oil well plugging operation, which consists of an upper impact joint 1, a rubber cup 2, a central tube 3, a valve housing, a valve seat 5 and a valve 6. The device is simple in structure, easy to be manufactured and reliable in work, thus using the utility model in the grouting and water block operation of the oil well can effectively prevent grout from leaking into a hydrocarbon zone, thereby being favorable to improving construction success ratio and water block effect and being favorable to dissemination and application.
Description
The utility model relates to a kind of downhole tool that is used for the oilwell water shutoff workover treatment.
The injecting cement in oil well water blockoff is a kind of technical measures that often adopt in the oilfield exploitation later stage.Traditional cementing shutoff method is at first to carry out well-flushing, when the flushing liquor that enters oil well and the flushing liquor that returns producing well reach in a basic balance, and cementing in the oil well again, the anti-circulation well cleanup of upper lifting pipe post then, closing well is waited with fixed attention.This cementing water-plugging technology is to be suitable for effectively for being in exploitation mid-early stage strata pressure than higher oil well, but then inapplicable for arriving the middle and later periods stratum of recovering the oil serious oil reservoir in debt.This is because strata pressure is low, during well-flushing leakage serious, not only waste flushing fluid but also flushing fluid and bleed and can pollute and the injury oil-gas Layer behind the stratum.For the oil gas well that individually stressor layer is low especially, flushing fluid squeeze in the well what just leakage what, can't set up circulation at all, the cement that the injects into well stratum of also bleeding is repeated sometimes to inject all block up for several times and is not lived, and causes repetition and invalid construction.Then can block the seepage flow pore throat on stratum behind the cement setting in the oil-gas Layer of bleeding, cause the oil-gas Layer permeability decrease, have a strong impact on oil well output and ordinary production thereof.
The purpose of this utility model is to provide a kind of cement stratum of bleeding that can prevent in the injecting cement in oil well water-blocking operation oil-gas Layer to be polluted the oilwell water shutoff operation cementing plug of injury.
The utility model is to realize like this.This kind cementing plug is made up of top pressed joint, glue bowl, central tube, valve bonnet, valve seat and valve ball, its structure and assembled relation are as follows: central tube is set with three grades of glue bowls outward, its upper end is hinged with a top pressed joint with screw thread, the lower end is connected with valve seat with screw thread, valve ball is housed in the valve seat, and its inner headed face step top is provided with valve bonnet.During the injecting cement in oil well water-blocking operation, at first this device is assembled in the lower end precalculated position between G.I.H top producing zone and the bottom plugged zone is housed on the cementing tubing string of plug; Then, with clear water or formation water as prepad fluid turn on pump well-flushing to meeting the requirements; Then, inject cement paste, beat displacement fluid cement paste is headed in the well on the plug; Behind the cemented up, till upper lifting pipe post direct flushing is extremely qualified; At last, trip out the cementing tubing string, and well is waited with fixed attention.
The utility model is simple in structure, is easy to processing and manufacturing, and reliable operation utilizes it can effectively prevent the cement paste oil-gas Layer of bleeding in the injecting cement in oil well water-blocking operation, helps improving construction success rate and water plugging effect, is suitable for and applies.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is and the matching used cementing plug of the utility model structural representation.
Below in conjunction with accompanying drawing enforcement of the present utility model is illustrated.
As shown in the figure, the utility model is made up of top pressed joint 1, glue bowl 2, central tube 3, valve bonnet 4, valve seat 5 and valve ball 6.Wherein, pressed joint 1 is the change snapping head that a upper/lower terminal is the inner oil tube button.Wrist bowl 2 is hollow bowl bodies, makes of oil resistant rubber.Central tube 3 has 2 " oil pipes of pin thread respectively for upper and lower end.Valve bonnet 4 is for having the circular steel shim of a plurality of uniform through holes.Valve seat 5 is the pipe that a upper end is processed with the oil pipe internal thread, and its inner headed face thread segment below has one the valve bonnet step is set, and the bottom has one to put the conical surface that valve ball is used.Valve ball 6 is a diameter 1
1/ 2 " stainless steel ball.Matching used cementing plug is the hollow plug that a bottom surface is obstructed, the periphery bottom is evenly equipped with a plurality of side openings.
Claims (1)
1, a kind of oilwell water shutoff operation cementing plug, form by top pressed joint (1), glue bowl (2), central tube (3), valve bonnet (4), valve seat (5) and valve ball (6), it is characterized in that, the outer 3 grades of glue bowls (2) that are set with of central tube (3), its upper end is hinged with a top pressed joint (1) with screw thread, the lower end is connected with valve seat (5) with screw thread, and valve ball (6) is housed in the valve seat (5), and its inner headed face step top is provided with valve bonnet (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01251139 CN2509317Y (en) | 2001-10-23 | 2001-10-23 | Cementing rubber plug for oil well plugging operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01251139 CN2509317Y (en) | 2001-10-23 | 2001-10-23 | Cementing rubber plug for oil well plugging operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2509317Y true CN2509317Y (en) | 2002-09-04 |
Family
ID=33661143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01251139 Expired - Fee Related CN2509317Y (en) | 2001-10-23 | 2001-10-23 | Cementing rubber plug for oil well plugging operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2509317Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412313C (en) * | 2006-09-05 | 2008-08-20 | 北京华油鼎力兴科技发展有限公司 | Plug-free cement filling method for well fixing |
| CN101482001B (en) * | 2008-01-11 | 2012-05-23 | 中国石油化工股份有限公司 | Rubber plug system used for drilling liner cementing of horizontal well |
| CN103603628A (en) * | 2013-12-11 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN104420859A (en) * | 2013-09-11 | 2015-03-18 | 国际壳牌研究有限公司 | Method To Underdisplace Hydraulic Fractures In Horizontal Or Deviated Well |
| CN107816364A (en) * | 2016-09-13 | 2018-03-20 | 卢泉生 | A kind of method for combining closure draining coal seam gas |
-
2001
- 2001-10-23 CN CN 01251139 patent/CN2509317Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412313C (en) * | 2006-09-05 | 2008-08-20 | 北京华油鼎力兴科技发展有限公司 | Plug-free cement filling method for well fixing |
| CN101482001B (en) * | 2008-01-11 | 2012-05-23 | 中国石油化工股份有限公司 | Rubber plug system used for drilling liner cementing of horizontal well |
| CN104420859A (en) * | 2013-09-11 | 2015-03-18 | 国际壳牌研究有限公司 | Method To Underdisplace Hydraulic Fractures In Horizontal Or Deviated Well |
| CN104420859B (en) * | 2013-09-11 | 2019-08-06 | 国际壳牌研究有限公司 | Drive method of the proppant moved in horizontal well or inclined shaft into fluid power fracturing fracture |
| CN103603628A (en) * | 2013-12-11 | 2014-02-26 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN103603628B (en) * | 2013-12-11 | 2017-01-18 | 中国石油集团川庆钻探工程有限公司 | Injecting-plugging method during under-well work |
| CN107816364A (en) * | 2016-09-13 | 2018-03-20 | 卢泉生 | A kind of method for combining closure draining coal seam gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |