CN204024592U - Bruising shut-in valve in down-hole for well cementation - Google Patents
Bruising shut-in valve in down-hole for well cementation Download PDFInfo
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- CN204024592U CN204024592U CN201420509961.0U CN201420509961U CN204024592U CN 204024592 U CN204024592 U CN 204024592U CN 201420509961 U CN201420509961 U CN 201420509961U CN 204024592 U CN204024592 U CN 204024592U
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Abstract
Well cementation described in the utility model relates to the valve gear of a kind of well or well with down-hole bruising shut-in valve.The utility model comprises the housing of hollow, and housing upper end is provided with internal thread, and lower end is provided with external screw thread, is also provided with the sliding sleeve of hollow and the valve seat of an end opening in housing; Sliding sleeve is fixed in the atrium of valve seat movably, on its sidewall, one way valve is installed; Valve seat is fixedly connected with housing, and offers circulation port on its sidewall.Compared with prior art, the utility model can thoroughly be closed shaft bottom in the time of well cementing impact pressure, effectively prevent that cement paste from blowing back into sleeve pipe and causing the generation of staying cement plug accident, can prevent again desilting or landwaste deposition obstruction circulation canal in drilling fluid, the technical need that can fully meet cementing operation operation, is widely used in the well cementing operation of all kinds of prospect pits, horizontal well, deep-well, Holes of Complicated Wells.
Description
Technical field
The utility model relates to the valve gear of a kind of well or well.
Background technology
In the cementing operation operation process of oil drilling at present; conventionally can prevent that cement paste from flowing backwards with casing float collar float shoe; once float collar float plug disabler, will directly cause cement paste to blow back in sleeve pipe and form cement plug, even can cause whole well to be scrapped when serious.There is at present a kind of casing shut-in valve for cementing operation (number of patent application: ZL201010266105.3), mainly by body, close cover, circulation overcoat forms, outer the putting of circulation is evenly equipped with circulation port, closes between cover and circulation overcoat and seals by "O"-ring.But this invention has following deficiency: first, when plug promotes to close cover while being moved downward to outside circulation that the circulation port that puts has just been closed, liquid between plug and circulation overcoat is just trapped in an airtight space, because liquid cannot be compressed, closing cover cannot continue to move down, because circulation port can not be covered completely, thus close unreliable; Secondly, because the outer sleeving inner space of circulation is less, and circulation port horizontal direction on its sidewall offers, and easily causes circulation canal obstruction in the time there is sand or landwaste deposition in drilling fluid, therefore, the reliability of this invention can not fully meet the technical need of cementing operation operation.
Summary of the invention
The utility model aims to provide a kind of well cementation down-hole bruising shut-in valve, it can prevent drilling fluid decline sand or landwaste deposition obstruction circulation canal, after cementing operation, reliably close sleeve bottom, effectively prevent that cement paste from blowing back in sleeve pipe, guarantees fully to meet the technical need of cementing operation operation.
Bruising shut-in valve in down-hole for well cementation described in the utility model, comprises the housing of hollow, and housing upper end is provided with internal thread, and lower end is provided with external screw thread, is also provided with the sliding sleeve of hollow and the valve seat of an end opening in housing; Sliding sleeve is fixed in the atrium of valve seat movably, on its sidewall, one way valve is installed; Valve seat is fixedly connected with housing, and offers circulation port on its sidewall.
Preferably, valve seat is fixedly connected with housing by valve pocket, in valve pocket, is provided with and cuts off, and the part cutting off is fixedly connected with sliding sleeve, and sliding sleeve is fixed in the cavity of valve seat movably.
More preferably, valve seat is bowl-shape, and sliding sleeve is tubular.
More preferably, the down-hole bruising shut-in valve use that is connected with bunch tube for well cementation.
Compared with prior art, the utility model can thoroughly be closed shaft bottom in the time of well cementing impact pressure, effectively prevent that cement paste from blowing back into sleeve pipe and causing the generation of staying cement plug accident, can prevent again desilting or landwaste deposition obstruction circulation canal in drilling fluid, the technical need that can fully meet cementing operation operation, is widely used in the well cementing operation of all kinds of prospect pits, horizontal well, deep-well, Holes of Complicated Wells.
Brief description of the drawings
Fig. 1 be embodiment mono-partly cut open figure.
To be embodiment mono-partly cut open figure after plug being pressed into Fig. 2.
In figure: 1-housing, 2-sliding sleeve, 3-valve pocket, 4-valve seat, 5-cuts off, 6-one way valve, 7-circulation port.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described further.
As shown in Figure 1, the utility model comprise housing 1, sliding sleeve 2, valve pocket 3, valve seat 4, cut off 5, one way valve 6; Housing 1 is tubular structure, and internal thread is established on top, and external screw thread is established in bottom; Valve pocket 3 is tubular structure, is fixed on housing 1 internal upper part by screw thread; Sliding sleeve 2 is tubular structure, is fixed on valve pocket 3 inside by cutting off 5, and its underpart outer wall has groove, holds one way valve 6 in groove, and its upper end sidewall has through hole; Valve seat 4 is bowl structure, is positioned at valve pocket 3 bottoms in housing 1, the uniform circulation port 7 of its sidewall surrounding; Between described valve pocket 3 and sliding sleeve 2 and housing 1, seal by sealing ring.The utility model is the use that is connected with bunch tube.
While using this utility model, the internal thread rotation on housing 1 top is connected to casing string bottom, housing 1 lower external thread is connected to casing float collar top, complete while carrying out circulation of drilling fluid and cementing job after casing job, liquid stream can flow downwards smoothly through the circulation port 7 on sliding sleeve 2 inner chambers and valve seat 4.Because valve seat 4 is a bowl assembling structure, space is larger in it, and the circulation port of its sidewall 7 surpasses side-lower and open, and desilting and landwaste pass through more smoothly, are difficult for resulting in blockage; After cementing operation completes, be pressed into plug and replace while starching to bruising, plug promotes sliding sleeve 2 and cuts off and cut off 5 and move down, because the one way valve 6 of sliding sleeve lower end outer wall has the effect of one-way sealing, so then the liquid between plug and valve seat 4 can discharge by the circulation port of valve seat 4 sidewalls by the gap between sliding sleeve 2 and valve seat 4 and through one way valve 6 smoothly, until valve seat 4 inner faces are touched in sliding sleeve 2 lower ends; As shown in Figure 2, now fluid course is closed, one way valve 6 between valve seat 4 inwalls and sliding sleeve 2 plays one-way sealing effect, and cement paste cannot the circulation port 7 on valve seat 4 passes back in sleeve pipe and forms cement plug, can guarantee to meet thus the demand of cementing operation operation.
Claims (4)
1. cement the well with down-hole bruising shut-in valve, comprise the housing (1) of hollow, housing (1) upper end is provided with internal thread, and lower end is provided with external screw thread, it is characterized in that being also provided with in housing (1) sliding sleeve (2) of hollow and the valve seat (4) of an end opening; Sliding sleeve (2) is fixed in the atrium of valve seat (4) movably, and one way valve (6) is installed on its sidewall; Valve seat (4) is fixedly connected with housing (1), and on its sidewall, offers circulation port (7).
2. bruising shut-in valve in down-hole for well cementation as claimed in claim 1, it is characterized in that valve seat (4) is fixedly connected with housing (1) by valve pocket (3), in valve pocket (3), be provided with and cut off (5), a part that cuts off (5) is fixedly connected with sliding sleeve (2), and sliding sleeve (2) is fixed in the cavity of valve seat (4) movably.
3. bruising shut-in valve in down-hole for well cementation as claimed in claim 2, is characterized in that valve seat (4) is for bowl-shape, and sliding sleeve (2) is tubular.
4. bruising shut-in valve in down-hole for the well cementation as described in claim 1 or 2 or 3, is characterized in that described well cementation down-hole bruising shut-in valve is the use that is connected with bunch tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509961.0U CN204024592U (en) | 2014-09-05 | 2014-09-05 | Bruising shut-in valve in down-hole for well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420509961.0U CN204024592U (en) | 2014-09-05 | 2014-09-05 | Bruising shut-in valve in down-hole for well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204024592U true CN204024592U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201420509961.0U Active CN204024592U (en) | 2014-09-05 | 2014-09-05 | Bruising shut-in valve in down-hole for well cementation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257243A (en) * | 2015-10-20 | 2016-01-20 | 中国石油天然气股份有限公司 | Well cementing bump pressure shut-in sliding sleeve device |
| CN109751013A (en) * | 2019-01-08 | 2019-05-14 | 青岛鑫源晟石油科技有限公司 | One kind can bore sizing collar |
| CN110878680A (en) * | 2019-10-28 | 2020-03-13 | 大庆石油管理局有限公司 | Casing pipe lowering pressure-building one-way valve |
| CN112253045A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Sliding sleeve type impacting seat |
| CN117211729A (en) * | 2023-11-06 | 2023-12-12 | 中国石油集团渤海钻探工程有限公司 | Touch and press well closing ball seat |
-
2014
- 2014-09-05 CN CN201420509961.0U patent/CN204024592U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257243A (en) * | 2015-10-20 | 2016-01-20 | 中国石油天然气股份有限公司 | Well cementing bump pressure shut-in sliding sleeve device |
| CN109751013A (en) * | 2019-01-08 | 2019-05-14 | 青岛鑫源晟石油科技有限公司 | One kind can bore sizing collar |
| CN109751013B (en) * | 2019-01-08 | 2023-11-03 | 青岛鑫源晟石油科技有限公司 | Drillable classifying hoop |
| CN110878680A (en) * | 2019-10-28 | 2020-03-13 | 大庆石油管理局有限公司 | Casing pipe lowering pressure-building one-way valve |
| CN112253045A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Sliding sleeve type impacting seat |
| CN117211729A (en) * | 2023-11-06 | 2023-12-12 | 中国石油集团渤海钻探工程有限公司 | Touch and press well closing ball seat |
| CN117211729B (en) * | 2023-11-06 | 2024-01-26 | 中国石油集团渤海钻探工程有限公司 | Touch and press well closing ball seat |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |