CN212837709U - Oil well associated gas recovery device - Google Patents
Oil well associated gas recovery device Download PDFInfo
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- CN212837709U CN212837709U CN202020596183.9U CN202020596183U CN212837709U CN 212837709 U CN212837709 U CN 212837709U CN 202020596183 U CN202020596183 U CN 202020596183U CN 212837709 U CN212837709 U CN 212837709U
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- 239000003129 oil well Substances 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 description 8
- 238000005086 pumping Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an oil well associated gas recovery unit, include: the gas-casing pipeline is connected to a gas well casing pipe at a wellhead and is provided with a first valve; the oil outlet pipeline is connected to one side of the upper end of the oil pipe of the wellhead, and a second valve is arranged on the oil outlet pipeline and is a constant-pressure check valve with an opening direction back to the oil pipe; the casing gas inlet pipeline is provided with a third valve, one end of the casing gas inlet pipeline is connected between the first valve and the gas well casing pipe on the casing gas pipeline, the other end of the casing gas inlet pipeline is connected between the oil pipe and the second valve on the oil outlet pipeline, and the third valve is a check valve with an opening direction facing the oil outlet pipeline. The utility model discloses an oil well associated gas recovery unit can improve oil well associated gas rate of recovery and utilization ratio, can reach high-quality resource recycle and energy saving and emission reduction's purpose.
Description
Technical Field
The utility model belongs to the technical field of the associated gas is retrieved, concretely relates to oil well associated gas recovery unit.
Background
At present, the development of low permeability oil reservoirs has low single-well liquid amount, oil wells often intermittently discharge liquid, water content rises along with the extension of the exploitation time of the oil wells, associated gas of the oil wells is less and less, and how to effectively recycle the associated gas develops methods such as a constant pressure vent valve, underground oil gas mixed pumping and the like, but the constant pressure vent valve of an oil collecting pipeline cannot be opened due to the insufficient pressure of the associated gas because of small gas amount; the underground oil-gas mixed pumping construction is complex and has the requirement on the sleeve, and the aim of effectively recovering the associated gas cannot be met.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is an object of the present invention to provide an oil well associated gas recovery device for overcoming the above problems or at least partially solving or alleviating the above problems.
The utility model provides an oil well associated gas recovery unit, include:
the gas casing pipeline is connected to a gas well casing of a wellhead, and a first valve is arranged on the gas casing pipeline;
the oil outlet pipeline is connected to one side of the upper end of an oil pipe of a wellhead, a second valve is arranged on the oil outlet pipeline, and the second valve is a constant-pressure check valve with an opening direction back to the oil pipe;
the gas-casing inlet pipeline is provided with a third valve, one end of the gas-casing inlet pipeline is connected to the gas-casing pipeline, the first valve is connected to the gas-casing pipeline, the other end of the gas-casing inlet pipeline is connected to the oil outlet pipeline, the oil pipe is connected to the second valve, and the third valve is a check valve with an opening facing the oil outlet pipeline.
The utility model discloses optional characteristic below still having.
Optionally, the first valve is a gate valve or a constant pressure bleed valve.
Optionally, a fourth valve is arranged on the oil outlet pipeline, and the fourth valve is a gate valve.
Optionally, a fifth valve is arranged on the sleeve gas inlet pipeline, and the fifth valve is a gate valve.
Optionally, the casing gas inlet line includes a first inclined section, a second inclined section and a third inclined section, the first inclined section is connected with the casing gas line, the third inclined section is connected with the oil outlet line, two ends of the second inclined section are connected between the first inclined section and the third inclined section, and one end of the second inclined section connected with the third inclined section is higher than one end of the first inclined section.
Optionally, the third valve is disposed on the third sloped section.
Optionally, the fifth valve is disposed on the first angled section.
The utility model has the advantages that:
the oil well associated gas recovery device of the utility model communicates the gas well casing pipe of the oil well mouth with the oil outlet pipeline through the sleeve gas inlet pipeline and the third valve, when the oil pumping unit drives the polish rod to move downwards, the liquid amount in the oil pipe is insufficient to form a low-pressure cavity, the associated gas opens the third valve to enter the oil production pipeline and the oil pipe low-pressure cavity, when the oil pumping unit drives the polish rod to move upwards, the liquid amount in the oil pipe is compressed to form a high-pressure oil-gas mixture, and the high-pressure oil-gas mixture opens the second valve on the oil outlet pipeline to enter the oil collecting; therefore, the oil well associated gas is mixed, collected and transported, the recovery rate and the utilization rate of the oil well associated gas are improved, and the purposes of high-quality resource recycling, energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic view of the overall structure of an embodiment of the oil-well associated gas recovery device of the present invention.
In the above figures: 1 set of gas pipeline; 2 gas well casing; 3 a first valve; 4, an oil outlet line; 5, oil pipe; 6 a second valve; 7 sets of gas inlet pipelines; 701 a first inclined section; 702 a second inclined section; 703 a third inclined segment; 8 a third valve; 9 a fourth valve; 10 a fifth valve; 11 a polish rod.
The present invention will be described in further detail with reference to the accompanying drawings and examples;
Detailed Description
Example 1
Referring to fig. 1, an embodiment of the present invention provides an oil well associated gas recovery device, including: the gas-casing pipeline 1 is connected to a gas well casing 2 at a wellhead, and the gas-casing pipeline 1 is provided with a first valve 3; the oil outlet pipeline 4 is connected to one side of the upper end of an oil pipe 5 of a wellhead, a second valve 6 is arranged on the oil outlet pipeline 4, and the second valve 6 is a constant-pressure check valve with an opening direction back to the oil pipe 5; the casing gas inlet pipeline 7 is provided with a third valve 8, one end of the casing gas inlet pipeline 7 is connected between the first valve 3 and the gas well casing 2 on the casing gas pipeline 1, the other end of the casing gas inlet pipeline is connected between the oil pipe 5 and the second valve 6 on the oil outlet pipeline 4, and the third valve 8 is a check valve with an opening direction facing the oil outlet pipeline 4.
When a first valve 3 on the casing gas pipeline 1 is opened, associated gas in a gas well casing 2 enters the casing gas pipeline 1, if the pressure of the associated gas in the gas well casing 2 is insufficient, the first valve 3 needs to be closed, when a polished rod 11 connected with an oil well pump is dragged by the oil pumping unit to move downwards, a low-pressure cavity is formed in an oil pipe 5, and the associated gas enters the low-pressure cavity of the oil pipe through a casing gas inlet pipeline 7 and a second valve 6 serving as a constant-pressure check valve; when the oil pumping unit drags the polish rod 11 connected with the oil well pump to move upwards, the liquid amount in the oil pipe 5 is compressed to form a high-pressure oil-gas mixture, and the high-pressure oil-gas mixture enters the oil collecting pipeline through the oil outlet pipeline 4 and the second valve 6, so that associated gas is recycled.
Example 2
Referring to fig. 1, on the basis of embodiment 1, the first valve 3 is a gate valve or a constant pressure relief valve.
When the first valve 3 is used as a gate valve, the casing gas pipeline 1 is completely closed after the first valve 3 is closed, and the associated gas in the gas well casing 2 can only pass through the casing gas inlet pipeline 7 and the third valve 8; when the first valve 3 is positioned at the constant-pressure gas release valve, and the pressure of the associated gas in the gas well casing 2 is greater than the gas release pressure of the first valve 3, the associated gas can rush the first valve 3 to enter the gas sleeve pipeline 1 to be collected.
Example 3
Referring to fig. 1, in addition to embodiment 1, a fourth valve 9 is provided on the flowline 4, and the fourth valve 9 is a gate valve.
The fourth valve 9 is a gate valve, and when the fourth valve 9 is closed, the downstream pipeline can be maintained, and the oil outlet pipeline 4 can be completely closed after the production of the oil well is stopped.
Example 4
Referring to fig. 1, in embodiment 1, a fifth valve 10 is disposed on the sheath gas inlet line 7, and the fifth valve 10 is a gate valve.
After the fifth valve 10 is closed, the casing gas inlet line 7 can be repaired, and if the oil well no longer recovers oil-associated gas, the fifth valve 10 is closed to completely close the casing gas inlet line 7.
Example 5
Referring to fig. 1, in embodiment 1, the casing gas inlet line 7 includes a first slope section 701, a second slope section 702, and a third slope section 703, the first slope section 701 is connected to the casing gas line 1, the third slope section 703 is connected to the flow line 4, both ends of the second slope section 702 are connected between the first slope section 701 and the third slope section 703, and one end of the second slope section 702 connected to the third slope section 703 is higher than one end of the first slope section 701.
Example 6
Referring to fig. 1, on the basis of embodiment 4, a third valve 8 is provided on the third incline section 703.
The third valve 8 is a check valve with a downward opening, and is arranged on the third inclined section 703 close to the oil outlet pipeline 4, so that liquid pumped out from the oil pipe 5 can be prevented from entering the casing gas inlet pipeline 7, and maintenance of the casing gas inlet pipeline 7 is facilitated.
Example 7
Referring to fig. 1, in embodiment 4, a fifth valve 10 is provided on a first slope section 701.
The fifth valve 10 is a gate valve and is arranged on the first inclined section 701 close to the sleeve gas pipeline 1, and when the sleeve gas inlet pipeline 7 is used at ordinary times, associated gas condensate passes through the fifth valve 10, so that the associated gas condensate is kept lubricated and is not easy to block.
Example 8
The utility model discloses an oil well companion gas recovery unit is in the actual work process: when the pumping unit drives the polished rod 11 to move downwards, a low-pressure cavity is formed in the oil pipe 5, so that associated gas in the gas well casing 2 enters the oil outlet pipeline 4 through the casing gas inlet pipeline 7 and the check valve third valve 8 on the casing gas inlet pipeline 7; when the pumping unit drives the polished rod 11 to move upwards, the liquid amount in the oil pipe 5 is compressed to form high-pressure oil-gas mixture, and the high-pressure oil-gas mixture enters the oil collecting pipeline through the second valve 6 of the constant-pressure check valve on the oil outlet pipeline 4.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (7)
1. An oil well associated gas recovery device, comprising:
the gas sleeving pipeline (1), the gas sleeving pipeline (1) is connected to a gas well casing (2) of a wellhead, and a first valve (3) is arranged on the gas sleeving pipeline (1);
the oil outlet pipeline (4) is connected to one side of the upper end of an oil pipe (5) of a wellhead, a second valve (6) is arranged on the oil outlet pipeline (4), and the second valve (6) is a constant-pressure check valve with an opening direction back to the oil pipe (5);
cover gas inlet line (7), be provided with third valve (8) on cover gas inlet line (7), the one end of cover gas inlet line (7) is connected on cover gas pipeline (1) first valve (3) with between gas well sleeve pipe (2), the other end is connected on oil outlet line (4) oil pipe (5) with between second valve (6), third valve (8) are opening direction orientation the check valve of oil outlet line (4).
2. The oil-well associated gas recovery device according to claim 1, wherein the first valve (3) is a gate valve or a constant pressure vent valve.
3. An oil associated gas recovery device according to claim 1, wherein a fourth valve (9) is arranged on the oil outlet pipeline (4), and the fourth valve (9) is a gate valve.
4. An oil-well associated gas recovery device according to claim 1, wherein a fifth valve (10) is arranged on the casing gas inlet pipeline (7), and the fifth valve (10) is a gate valve.
5. The oilfield associated gas recovery apparatus according to claim 4, wherein the casing gas inlet line (7) comprises a first slanted section (701), a second slanted section (702), and a third slanted section (703), the first slanted section (701) is connected to the casing gas line (1), the third slanted section (703) is connected to the flowline (4), both ends of the second slanted section (702) are connected between the first slanted section (701) and the third slanted section (703), and one end of the second slanted section (702) connected to the third slanted section (703) is higher than one end of the first slanted section (701).
6. An oil well associated gas recovery device according to claim 5, wherein said third valve (8) is arranged on said third slanted section (703).
7. An oil well associated gas recovery device according to claim 5, wherein said fifth valve (10) is provided on said first inclined section (701).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596183.9U CN212837709U (en) | 2020-04-20 | 2020-04-20 | Oil well associated gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596183.9U CN212837709U (en) | 2020-04-20 | 2020-04-20 | Oil well associated gas recovery device |
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| Publication Number | Publication Date |
|---|---|
| CN212837709U true CN212837709U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020596183.9U Active CN212837709U (en) | 2020-04-20 | 2020-04-20 | Oil well associated gas recovery device |
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| CN (1) | CN212837709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472727A (en) * | 2020-04-20 | 2020-07-31 | 中国石油天然气股份有限公司 | Oil well associated gas recovery device and associated gas recovery method |
-
2020
- 2020-04-20 CN CN202020596183.9U patent/CN212837709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472727A (en) * | 2020-04-20 | 2020-07-31 | 中国石油天然气股份有限公司 | Oil well associated gas recovery device and associated gas recovery method |
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