CN201778759U - Underground tubing-casing annulus pressure-reducing device - Google Patents
Underground tubing-casing annulus pressure-reducing device Download PDFInfo
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- CN201778759U CN201778759U CN2010205060699U CN201020506069U CN201778759U CN 201778759 U CN201778759 U CN 201778759U CN 2010205060699 U CN2010205060699 U CN 2010205060699U CN 201020506069 U CN201020506069 U CN 201020506069U CN 201778759 U CN201778759 U CN 201778759U
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- tube
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Abstract
The utility model discloses an underground tubing-casing annulus pressure-reducing device which comprises an oil tube collar, a central tube, an adjusting compression ring, a seal ring, a spring, an annular check valve, an annular valve seat and an outer working barrel; the annular valve seat, the annular check valve, the spring, the seal ring and the adjusting compression ring are arranged inside the outer working barrel and outside the central tube in sequence; and the outer working barrel is fixed outside the central tube through welding. The utility model can reduce the tubing-casing annulus pressure of an oil well and improve the efficiency of an oil pumping system of the oil well, has strong reliability and can be widely applied to oil production.
Description
One, technical field
The utility model relates to a kind of oil exploitation underground pressure reducing device, particularly a kind of downhole oil collar pressure device of dropping from the air.
Two, background technology
At present, oil field high gas-oil ratio (HGOR) well is produced and extensively to be adopted collar piping vent valve flow process to reclaim the isolated natural gas in down-hole in the crude oil process, and reduces pressure in the oil jacket annular space with this, improves the oil pumping pump efficiency.This venting flow process mainly is made up of ball-and-seat and control valve, can realize the sleeve pipe bleed, but actual use easily exists winter low temperature environment venting flow process to freeze stifled shortcoming, freezing can influence venting flow process operating efficiency after stifled, even can't realize oil jacket annular space bleed, greatly reduce down-hole oil pumping system efficient, also bring very big inconvenience to production management.
Three, summary of the invention
The purpose of this utility model provides the airborne pressure device of a kind of downhole oil collar, it can avoid and overcome the shortcoming and defect that exists in the prior art effectively, solve the difficult problem that oil jacket annular space bleed is subjected to the ground environment temperature difference influence, improve down-hole oil pumping system efficient.
The technical scheme that its technical problem that solves the utility model adopts is: the airborne pressure device of the downhole oil collar is made up of tubing coupling, central tube, adjusting pressure ring, sealing ring, spring, annular ball-and-seat, ring-shaped valve seats and outer working tube.Described outer working tube is interior, central tube is installed ring-shaped valve seats, annular ball-and-seat, spring, sealing ring and adjusting pressure ring outward in turn, and described outer working tube solid welding is outside central tube.
Wherein, described central tube middle part is provided with outer step, and step top is provided with at least two uniform inside and outside intercommunicating pores.Described outer working tube bottom is provided with at least one intercommunicating pore.Described adjusting pressure ring and outer working tube link by screw thread.
The utility model compared with prior art has the following advantages:
1, can reduce the interior pressure of downhole oil cover annular space, improve oil pumping system efficient.
2, rational in infrastructure simple, sealing load height, good reliability.
Four, description of drawings
Accompanying drawing is the utility model structural representation.
Five, the specific embodiment
Consult accompanying drawing, a kind of downhole oil collar pressure device of dropping from the air comprises tubing coupling 1, central tube 2, regulates pressure ring 3, sealing ring 4, spring 5, annular ball-and-seat 6, ring-shaped valve seats 7 and outer working tube 8 form.Central tube 2 is outer, install ring-shaped valve seats 7, annular ball-and-seat 6, spring 5, sealing ring 4 in turn and regulate pressure ring 3 in the outer working tube 8, and outer working tube 8 solid weldings are outside central tube 2.Central tube 2 middle parts are provided with outer step, and step top is provided with at least two uniform inside and outside intercommunicating pores, and outer working tube 8 bottoms are provided with an intercommunicating pore at least, regulate pressure ring 3 and outer working tube 8 and link by screw thread.
During use the airborne pressure device of the downhole oil collar is connected with well mouth of oil well vicinity oil pipe, because the downhole oil temperature is higher, so the utility model can not freeze stifled because of the ambient temperature reduction, pressure in the oil jacket annular space hour annular ball-and-seat 6 seals by deadweight and spring 5 effects, preventing to produce liquid in pipe pours in down a chimney, when the pressure in the oil jacket annular space is big, annular ball-and-seat 6 can be opened and make that gas-liquid enters in the oil pipe in the oil jacket annular space, annular ball-and-seat 6 is opened pressure reduction can be by regulating the pressure ring 3 preceding adjusting of going into the well, realize that the oil jacket annular pressure keeps zone of reasonableness, improves the oil well oil-pumping system effectiveness.
Claims (3)
1. the airborne pressure device of the downhole oil collar, comprise tubing coupling, central tube, adjusting pressure ring, sealing ring, spring, annular ball-and-seat, ring-shaped valve seats and outer working tube composition, described outer working tube is interior, central tube is installed ring-shaped valve seats, annular ball-and-seat, spring, sealing ring and adjusting pressure ring outward in turn, and described outer working tube solid welding is outside central tube.
2. the downhole oil collar according to claim 1 pressure device of dropping from the air is characterized in that described central tube middle part is provided with outer step, and step top is provided with at least two uniform inside and outside intercommunicating pores, is provided with at least one intercommunicating pore bottom the described outer working tube.
3. the downhole oil collar according to claim 1 pressure device of dropping from the air is characterized in that described adjusting pressure ring and outer working tube link by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205060699U CN201778759U (en) | 2010-08-23 | 2010-08-23 | Underground tubing-casing annulus pressure-reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205060699U CN201778759U (en) | 2010-08-23 | 2010-08-23 | Underground tubing-casing annulus pressure-reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778759U true CN201778759U (en) | 2011-03-30 |
Family
ID=43791972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205060699U Expired - Fee Related CN201778759U (en) | 2010-08-23 | 2010-08-23 | Underground tubing-casing annulus pressure-reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778759U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
| CN104213871A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Downhole casing pressure air release valve of thickened oil horizontal well and pressure regulating method |
| CN105840184A (en) * | 2016-06-14 | 2016-08-10 | 西安石油大学 | Annular space pressure monitoring and control device and method for deep sea seafloor wellhead |
| CN108843272A (en) * | 2018-06-19 | 2018-11-20 | 中国海洋石油集团有限公司 | Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure |
| US11215032B2 (en) | 2020-01-24 | 2022-01-04 | Saudi Arabian Oil Company | Devices and methods to mitigate pressure buildup in an isolated wellbore annulus |
-
2010
- 2010-08-23 CN CN2010205060699U patent/CN201778759U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213871A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Downhole casing pressure air release valve of thickened oil horizontal well and pressure regulating method |
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
| CN104196491B (en) * | 2014-08-20 | 2016-07-06 | 何富全 | Oil water well hydraulic power-assisted oil jacket technique intercommunicating device |
| CN105840184A (en) * | 2016-06-14 | 2016-08-10 | 西安石油大学 | Annular space pressure monitoring and control device and method for deep sea seafloor wellhead |
| CN105840184B (en) * | 2016-06-14 | 2022-11-29 | 西安石油大学 | Device and method for monitoring and controlling annulus pressure of deep sea seabed wellhead |
| CN108843272A (en) * | 2018-06-19 | 2018-11-20 | 中国海洋石油集团有限公司 | Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure |
| CN108843272B (en) * | 2018-06-19 | 2020-06-30 | 中国海洋石油集团有限公司 | Recoverable pressure relief tool for releasing annular confining pressure and well completion well structure |
| US11215032B2 (en) | 2020-01-24 | 2022-01-04 | Saudi Arabian Oil Company | Devices and methods to mitigate pressure buildup in an isolated wellbore annulus |
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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: 20110330 Termination date: 20110823 |