CN112523724A - Downhole casing gas-releasing device - Google Patents
Downhole casing gas-releasing device Download PDFInfo
- Publication number
- CN112523724A CN112523724A CN202011514180.7A CN202011514180A CN112523724A CN 112523724 A CN112523724 A CN 112523724A CN 202011514180 A CN202011514180 A CN 202011514180A CN 112523724 A CN112523724 A CN 112523724A
- Authority
- CN
- China
- Prior art keywords
- flow passage
- valve body
- release valve
- air release
- channel
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000000178 monomer Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 16
- 239000003921 oil Substances 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Check Valves (AREA)
Abstract
An air bleeder for a downhole casing. Mainly solves the problem that the existing constant-pressure air release device is exposed and easy to damage. The method is characterized in that: an air release valve body (1) is fixed on the outer wall of the oil pipe hanger (6), the interior of the air release valve body (1) is axially divided into an upper cavity and a lower cavity which are respectively a flow passage E (11) and a flow passage A (7), the flow passage E (11) and the flow passage A (7) are connected through a flow passage C (9), a float (4) is arranged in the flow passage A (7), and a flow passage B (8) is formed in the outer wall of the air release valve body (1) at the upper end of the float (4); the upper part of the flow passage C (9) is provided with a sealing ball (3), the inside of the flow passage E (11) is provided with a weighting rod (2), and the flow passage E (11) is communicated with the inside of the oil pipe hanger (6) through a flow passage D (10). The underground casing air bleeder is lowered to an underground annular space along with an underground pipe column in the operation process, and is prevented from being damaged due to exposure.
Description
Technical Field
The invention relates to the field of oil fields, in particular to an underground casing gas release device.
Background
At present, the liquid in the casing of the oil field can release crude oil associated gas (natural gas) in the oil extraction process, and in order to reduce unnecessary loss generated in the casing emptying process, the associated gas in the casing annulus is discharged into the oil pipe by a constant-pressure air bleeder to be collected and transported during production. The existing constant-pressure air release device basically performs constant-pressure discharge at a ground combined wellhead, and has the defects that the constant-pressure air release device is exposed and is easy to be damaged manually, natural gas is easy to leak due to failure, and certain harm is caused to the environment.
Disclosure of Invention
In order to overcome the defect that the existing constant-pressure air bleeder is exposed and is easy to damage, the invention provides the underground casing air bleeder.
The technical scheme of the invention is as follows: the utility model provides a casing air bleeder in pit, includes tubing hanger, its characterized in that: an air release valve body is fixed on the outer wall of the oil pipe hanger, the inner part of the air release valve body is axially divided into an upper cavity and a lower cavity which are respectively an overflow channel E and an overflow channel A, the overflow channel E is connected with the overflow channel A through an overflow channel C, a floater is arranged in the overflow channel A, and an overflow channel B is arranged on the outer wall of the air release valve body at the upper end of the floater; the upper part of the flow passage C is provided with a sealing ball, a weighting rod is arranged in the flow passage E, and the flow passage E is communicated with the inside of the oil pipe hanger through a flow passage D.
The bottom of the overflowing channel A is open, a limit pin is connected to the side wall of the air release valve body, and the limit pin is located at the bottom of the floater.
And an ejector rod is arranged at the upper end of the floater, and the diameter of the ejector rod is smaller than the inner diameter of the overflowing channel C.
The air release valve body is formed by connecting an upper monomer and a lower monomer.
The upper part of the flow passage C is provided with a conical surface, and the sealing ball is matched with the conical surface.
The invention has the following beneficial effects: by adopting the scheme, the air bleeder is placed into the underground annular space along with the underground pipe column in the operation process, so that the constant-pressure discharge of the casing associated gas can be realized, the device can be prevented from being exposed and damaged artificially, and the natural gas is prevented from being discharged into the air to pollute the environment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a sectional view taken along line B-B in FIG. 1
In the figure, 1-a gas release valve body, 2-a weighting rod, 3-a sealing ball, 4-a floater, 5-a limiting pin, 6-an oil hanger, 7-a flow passage A, 8-a flow passage B, 9-a flow passage C, 10-a flow passage D.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 and 2, the downhole casing gas release device comprises an oil pipe hanger 6, wherein a gas release valve body 1 is fixed on the outer wall of the oil pipe hanger 6, the gas release valve body 1 is cylindrical and is axially fixed on the oil pipe hanger 6, and for the convenience of processing and installation, the gas release valve body 1 can be formed by connecting an upper monomer and a lower monomer. The interior of the relief valve body 1 is divided into an upper cavity and a lower cavity which are respectively an overflow channel E11 and an overflow channel A7, and the overflow channel E11 and the overflow channel A7 are connected through an overflow channel C9. The upper part of the overflowing channel C9 is provided with a conical surface, the upper part of the conical surface is provided with a sealing ball 3, and the sealing ball 3 is matched with the conical surface to seal the overflowing channel C9. The bottom of the overflowing channel A7 is opened, a floater 4 is arranged in the overflowing channel A7, and the outer wall of the air release valve body 1 at the upper end of the floater 4 is provided with an overflowing channel B8. Be connected with spacing pin 5 on the lateral wall of relief valve body 1, and spacing pin 5 is located float 4 bottom, can prevent that float 4 from dropping by in the relief valve body 1. And the upper end of the floater 4 is provided with a top rod, and the diameter of the top rod is smaller than the inner diameter of the overflowing channel C9, so that the top rod can extend upwards from the overflowing channel C9, and the sealing ball 3 is jacked up. The inside of the flow-through channel E11 is provided with a weighting rod 2, the weighting rod 2 is positioned at the upper part of the sealing ball 3, and the flow-through channel E11 is communicated with the inside of the tubing hanger 6 through a flow-through channel D10.
When the pressure of associated gas (natural gas) in the annular space of the sleeve reaches a set pressure value, the buoyancy at the moment is larger than the weight of the weighting rod 2, the floater 4 moves upwards in the overflowing channel A7 along the axial direction under the action of the buoyancy, the ejector rod at the end part jacks up the sealing ball 3 and the weighting rod 2 through the overflowing channel C9, at the moment, the overflowing channel B8, the overflowing channel C9, the overflowing channel E11 and the overflowing channel D10 are opened, and the associated gas enters the oil pipe through the overflowing channel B8, the overflowing channel A7, the overflowing channel C9, the overflowing channel E11 and the overflowing channel D10 in sequence, so that the constant-pressure discharge of the associated gas is realized. Along with the discharge of associated gas, the pressure difference between two ends of the float 4 is reduced, when the pressure difference between two ends of the float 4 is smaller than the weight of the weighting rod 2, the weighting rod 2 presses the sealing ball 3 to descend along the axial direction under the action of gravity, the overflowing channel C9 is closed, the associated gas outside the overflowing channel B8 stops deflating, and when the pressure of the associated gas in the casing annulus outside the overflowing channel B8 reaches the design value again, the actions are repeated, and the next deflating process is carried out again.
Claims (5)
1. A downhole casing gas release device comprises a tubing hanger (6), and is characterized in that: an air release valve body (1) is fixed on the outer wall of the oil pipe hanger (6), the interior of the air release valve body (1) is axially divided into an upper cavity and a lower cavity which are respectively a flow passage E (11) and a flow passage A (7), the flow passage E (11) and the flow passage A (7) are connected through a flow passage C (9), a float (4) is arranged in the flow passage A (7), and a flow passage B (8) is formed in the outer wall of the air release valve body (1) at the upper end of the float (4); the upper part of the flow passage C (9) is provided with a sealing ball (3), a weighting rod (2) is arranged in the flow passage E (11), and the flow passage E (11) is communicated with the inside of the oil pipe hanger (6) through a flow passage D (10).
2. A downhole casing gas release device according to claim 1, wherein: the overflow channel A (7) is provided with an opening at the bottom, the side wall of the air release valve body (1) is connected with a limit pin (5), and the limit pin (5) is positioned at the bottom of the floater (4).
3. A downhole casing gas release device according to claim 2, wherein: and the upper end of the floater (4) is provided with a push rod, and the diameter of the push rod is smaller than the inner diameter of the overflowing channel C (9).
4. A downhole casing gas release device according to claim 3, wherein: the air release valve body (1) is formed by connecting an upper monomer and a lower monomer.
5. A downhole casing gas release device according to claim 4, wherein: the upper part of the overflowing channel C (9) is provided with a conical surface, and the sealing ball (3) is matched with the conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011514180.7A CN112523724A (en) | 2020-12-21 | 2020-12-21 | Downhole casing gas-releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011514180.7A CN112523724A (en) | 2020-12-21 | 2020-12-21 | Downhole casing gas-releasing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112523724A true CN112523724A (en) | 2021-03-19 |
Family
ID=75001942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011514180.7A Pending CN112523724A (en) | 2020-12-21 | 2020-12-21 | Downhole casing gas-releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112523724A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563299Y (en) * | 2002-08-07 | 2003-07-30 | 大庆油田有限责任公司 | Underwell casing gas discharge valve |
| CN203285389U (en) * | 2013-04-23 | 2013-11-13 | 中国石油天然气股份有限公司 | Deflation valve capable of releasing downhole casing pipe and achieving well backwashing |
| CN204387463U (en) * | 2015-01-02 | 2015-06-10 | 刘旭光 | Outlet valve on a kind of automobile |
| CN208106383U (en) * | 2018-04-24 | 2018-11-16 | 王绪辉 | Producing well energy-saving air release valve |
| CN209212539U (en) * | 2018-09-07 | 2019-08-06 | 中国石油天然气股份有限公司 | Weighting type ball-and-seat |
| CN214118154U (en) * | 2020-12-21 | 2021-09-03 | 大庆市博胜石油设备有限公司 | Downhole casing gas-releasing device |
-
2020
- 2020-12-21 CN CN202011514180.7A patent/CN112523724A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2563299Y (en) * | 2002-08-07 | 2003-07-30 | 大庆油田有限责任公司 | Underwell casing gas discharge valve |
| CN203285389U (en) * | 2013-04-23 | 2013-11-13 | 中国石油天然气股份有限公司 | Deflation valve capable of releasing downhole casing pipe and achieving well backwashing |
| CN204387463U (en) * | 2015-01-02 | 2015-06-10 | 刘旭光 | Outlet valve on a kind of automobile |
| CN208106383U (en) * | 2018-04-24 | 2018-11-16 | 王绪辉 | Producing well energy-saving air release valve |
| CN209212539U (en) * | 2018-09-07 | 2019-08-06 | 中国石油天然气股份有限公司 | Weighting type ball-and-seat |
| CN214118154U (en) * | 2020-12-21 | 2021-09-03 | 大庆市博胜石油设备有限公司 | Downhole casing gas-releasing device |
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