CN201292815Y - Floating shoes for cementing oil well - Google Patents
Floating shoes for cementing oil well Download PDFInfo
- Publication number
- CN201292815Y CN201292815Y CN 200820218853 CN200820218853U CN201292815Y CN 201292815 Y CN201292815 Y CN 201292815Y CN 200820218853 CN200820218853 CN 200820218853 CN 200820218853 U CN200820218853 U CN 200820218853U CN 201292815 Y CN201292815 Y CN 201292815Y
- Authority
- CN
- China
- Prior art keywords
- piston
- spring
- well
- oil well
- seal
- 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.)
- Expired - Fee Related
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 9
- 238000007667 floating Methods 0.000 title description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 239000004568 cement Substances 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 9
- 239000002002 slurry Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a float shoe used for the well cementation in an oil well, which comprises a body, a piston baffle plate, a seal piston, a spring and a spring base, wherein the spring base is arranged in the body, the spring is arranged above the body, the seal piston is arranged above the spring, a seal rubber ring is arranged on the surface of the seal piston, and the piston baffle plate is arranged above the seal piston. The utility model has reasonable design, simple structure, convenient use and reliable operation, can improve the instantaneity and the reliability of the sealing during the well cementation operation of the oil well, realize instantaneous sealing and achieve the goal of no cement plug at the bottom of the well after the well cementation and also avoid the delay of the operation time caused by the reversal cement slurry and the brought potential safety hazard.
Description
Technical field:
The utility model relates to a kind of downhole tool that is used for the well cementing operation of field produces well, belongs to oil drilling completion tool class.
Background technology:
At present, normally used float shoe adopts glueballs floating seal mode during the well cementing operation of field produces well, and this kind sealing means lacks sealing instantaneity, the time that causes cement paste to have to return.Simultaneously, before well cementation,, because the hydraulic blow of drilling fluid makes the sealing performance of glueballs be damaged, and the space that cement paste is had return, often after well cementing operation, can cause the adverse consequences that stays cement plug through circulation.To this, when finding that cement paste returns phenomenon after the on-the-spot well cementation, adopting usually builds the pressure, and the mode with fixed attention of waiting is handled, and has so both delayed the time of well cementing operation, also has potential safety hazard.
The utility model content:
Thereby the purpose of this utility model be to provide a kind of can be in the oil well cementing operation process with sealing and instantaneity effectively in conjunction with the oil well cementing float shoe that after well cementation, does not stay cement plug.
For achieving the above object, the utility model is achieved in that this kind well cementation is made up of body, piston baffle, packed-piston, O-ring seal, spring, spring pedestal with float shoe, its structure assembled relation is as follows: be provided with spring pedestal in the body, its top is provided with spring, the spring top is provided with packed-piston, the packed-piston surface is provided with O-ring seal, and the top is provided with piston baffle.During use, the mode of this kind float shoe body and screwed connection is assembled in the completion casing lower end, and as requested down to the precalculated position.In the well cementing operation process, hydraulic pressure makes intrinsic seal descending, exposes the side opening of circulation up and down of body middle part and bottom, constitutes circulation canal.When well cementation finished, it is up that spring promotes packed-piston, and circulation canal is blocked, and realizes instantaneous sealing, returns to stop cement paste, thereby reach the purpose that cement plug is not stayed in the shaft bottom.
The utility model is reasonable in design, simple in structure, easy to use, reliable operation, utilize it can in the oil well cementing operation process, improve the instantaneity and the reliability of sealing, realize instantaneous sealing, reach the purpose that cement plug is not stayed in shaft bottom, well cementation back, can also avoid returning the potential safety hazard that delays the activity duration and bring because of cement paste.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment:
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 float shoe body 1, piston baffle 2, packed-piston 3, O-ring seal 4, spring 5, spring pedestal 6.Wherein, body 1 is one " U " shape body, and its upper end is uncovered, and lower end closed is respectively equipped with cocycle through hole 7 and following circulation through hole 8 on middle part and the lower sides.Piston baffle 2 is the annular sheet body that an external diameter and body 1 internal diameter match.Packed-piston 3 is the solid cylinder that a diameter and body 1 internal diameter match, and which is provided with O-ring seal 4.Spring pedestal 6 is the cylinder that a diameter and body 1 internal diameter match, and its center is provided with through hole 9.
Claims (2)
1, a kind of oil well cementing float shoe, form by body (1), piston baffle (2), packed-piston (3), O-ring seal (4), spring (5), spring pedestal (6), it is characterized in that: be provided with spring pedestal (6) in the body (1), its top is provided with spring (5), spring (5) top is provided with packed-piston (3), packed-piston (3) surface is provided with O-ring seal (4), and the top is provided with piston baffle (2).
2, oil well cementing float shoe according to claim 1 is characterized in that, body (1) is one " U " shape body, and its upper end is uncovered, and lower end closed is respectively equipped with cocycle through hole (7) and following circulation through hole (8) on middle part and the lower sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820218853 CN201292815Y (en) | 2008-11-03 | 2008-11-03 | Floating shoes for cementing oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820218853 CN201292815Y (en) | 2008-11-03 | 2008-11-03 | Floating shoes for cementing oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201292815Y true CN201292815Y (en) | 2009-08-19 |
Family
ID=41006291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200820218853 Expired - Fee Related CN201292815Y (en) | 2008-11-03 | 2008-11-03 | Floating shoes for cementing oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201292815Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695897A (en) * | 2015-03-16 | 2015-06-10 | 中煤特殊凿井有限责任公司 | Well pipe grouting check device |
| CN108343419A (en) * | 2017-06-16 | 2018-07-31 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification drill holes foot guard structure and construction method |
| CN111155964A (en) * | 2020-03-10 | 2020-05-15 | 何华 | A exempt from to bore stopper cementing ware for oil development |
| CN115110916A (en) * | 2022-07-25 | 2022-09-27 | 中国石油化工股份有限公司 | Pressure-adjustable vortex tube |
-
2008
- 2008-11-03 CN CN 200820218853 patent/CN201292815Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695897A (en) * | 2015-03-16 | 2015-06-10 | 中煤特殊凿井有限责任公司 | Well pipe grouting check device |
| CN104695897B (en) * | 2015-03-16 | 2017-05-31 | 中煤特殊凿井有限责任公司 | A kind of well casing slip casting non-return device |
| CN108343419A (en) * | 2017-06-16 | 2018-07-31 | 新疆国利衡清洁能源科技有限公司 | A kind of underground coal gasification drill holes foot guard structure and construction method |
| CN108343419B (en) * | 2017-06-16 | 2024-04-05 | 新疆国利衡清洁能源科技有限公司 | Underground coal gasification drilling bottom protection structure and construction method |
| CN111155964A (en) * | 2020-03-10 | 2020-05-15 | 何华 | A exempt from to bore stopper cementing ware for oil development |
| CN115110916A (en) * | 2022-07-25 | 2022-09-27 | 中国石油化工股份有限公司 | Pressure-adjustable vortex tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20111103 |