CN111794716A - Underground associated gas pressure buffering device and method - Google Patents
Underground associated gas pressure buffering device and method Download PDFInfo
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- CN111794716A CN111794716A CN202010664672.8A CN202010664672A CN111794716A CN 111794716 A CN111794716 A CN 111794716A CN 202010664672 A CN202010664672 A CN 202010664672A CN 111794716 A CN111794716 A CN 111794716A
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- pressure
- piston
- gas
- baffle
- associated gas
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 36
- 239000003921 oil Substances 0.000 description 13
- 229930195733 hydrocarbon Natural products 0.000 description 9
- 239000004215 Carbon black (E152) Substances 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 230000008093 supporting effect Effects 0.000 description 7
- 239000003129 oil well Substances 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- -1 methyl hydrocarbon Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Landscapes
- 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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an underground associated gas pressure buffering device and method, and the technical scheme is as follows: the sealing device comprises a shell and an air pressure device, wherein a base is fixedly installed at the bottom of the shell, the air pressure device is fixedly installed on the right side of the base, a piston is connected to the inner wall of the air pressure device in a sliding mode, the bottom of the piston is fixedly connected with the base through a return spring, a spring rod is fixedly connected to the right side of the piston, a baffle is fixedly connected to the right side of the spring rod, and a second sealing strip is bonded to the bottom of the baffle: the piston is pushed by gas-liquid pressure, the spring rod is pushed by the piston, the baffle is pushed by the spring rod, a gap is formed at the interface of the baffle and the high-pressure cavity, high-pressure gas and liquid flow to the low-pressure cavity from the gap, the reset spring rebounds when the pressure is normal, the piston is pulled back, and the piston drives the baffle to close the interface of the high-pressure cavity, so that the automatic pressure removal effect is achieved.
Description
Technical Field
The invention relates to the technical field of oilfield equipment, in particular to an underground associated gas pressure buffering device and method.
Background
Associated gas, usually natural gas coexisting with petroleum, the associated gas is a combustible mixture composed of hydrocarbon gas mainly comprising low molecular saturated hydrocarbon and a small amount of non-hydrocarbon gas in subsurface porous stratum, and is in the gaseous form of petroleum, most of the associated gas mainly comprises methyl hydrocarbon, ethane, propane and the like, and also comprises a small amount of ammonia gas, sulfur dioxide, hydrogen sulfide and other gaseous compounds according to the oil production theory of organic hydrocarbon formation, organic matter evolution can generate liquid hydrocarbon and gaseous hydrocarbon, the gaseous hydrocarbon is either dissolved in the liquid hydrocarbon or exists in the upper part of the oil-gas reservoir in the gas cap state, both of the gaseous hydrocarbons are called oil field associated gas or associated gas, from the oil extraction work point of view, the natural gas produced during the oil field or oil reservoir is referred to as oil field gas produced along with crude oil coexisting, and the oil is produced simultaneously with the crude oil, wherein the associated gas is usually volatile part of the crude oil and exists on the oil-bearing stratum in the form of oil gas, the oil and gas in the crude oil stratum are in different proportions, even if the oil and gas sources in the same oil field are not necessarily the same, they are collected in the same rock reservoir by different ways and through different processes.
The prior art has the following defects: some existing oil wells have a large amount of associated gas, so that the gas pressure at the bottom of the well is large, the oil well pump and the one-way valve can be impacted by large gas pressure, the one-way valve cannot be closed when the traveling valve descends, and the oil well cannot be flooded directly.
Therefore, the invention is necessary to invent a downhole associated gas pressure buffer device.
Disclosure of Invention
Therefore, the invention provides a device and a method for buffering associated gas pressure in a well.
In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides an associated gas atmospheric pressure buffer in pit, includes shell and pneumatic means, shell bottom fixed mounting base, base right side fixed mounting pneumatic means, pneumatic means inner wall sliding connection piston, reset spring fixed connection base is passed through to the piston bottom, piston right side fixed connection spring beam, spring beam right side fixed connection baffle, baffle bottom bonding sealing strip two.
Preferably, two groups of grooves are formed in each end of the shell, rubber expansion rings are fixedly sleeved on the surfaces of the grooves, and four groups of the rubber expansion rings are arranged.
Preferably, the right end of the inner wall of the shell is fixedly provided with a supporting rod, the center of the supporting rod is fixedly provided with a bearing, and the right side of the bearing is sleeved with the turbofan.
Preferably, the outer wall of the air pressure device and the inner wall of the shell form a high-pressure cavity.
Preferably, the inner wall of the shell and the right side of the baffle form a low-pressure cavity.
Preferably, the surface of the piston is bonded with a first sealing strip.
Preferably, the right end of the inner wall of the shell is fixedly provided with a supporting rod, the center of the supporting rod is fixedly provided with a bearing, the bearing is sleeved with the center of a worm, and the surface of the worm is welded with a helical blade.
The invention provides a using method of an underground associated gas pressure buffering device, which comprises the following steps:
firstly, sleeving a rubber expansion ring (110) on the surface of a shell (100), placing an air pressure buffering device in an associated gas pipeline (170), and dividing the associated gas pipeline (170) into a high-pressure area and a low-pressure area by the air pressure buffering device;
secondly, when the pressure in high pressure district is too big, gas-liquid pressure promotes piston (230), piston (230) promote spring lever (250), spring lever (250) promote baffle (260), baffle (260) and high-pressure chamber (280) kneck form the gap, high-pressure gas-liquid flows to low-pressure chamber (150) from the gap, reset spring (220) kick-backs when pressure is normal, pull back piston (230), piston (230) drive baffle (260) close high-pressure chamber (280) interface, high-pressure gas-liquid passes through turbofan (130), it is rotatory to drive turbofan (130), can effectively change the direction of gas-liquid flow motion when gas-liquid flow strikes turbofan (130), reduce the speed of gas-liquid flow motion, reduce the influence to the check valve.
The invention has the beneficial effects that:
1. the inner wall of the air pressure device is connected with a piston in a sliding mode, the bottom of the piston is fixedly connected with a base through a reset spring, the right side of the piston is fixedly connected with a spring rod, the right side of the spring rod is fixedly connected with a baffle, a sealing strip II is bonded to the bottom of the baffle, the piston is pushed by air-liquid pressure, the piston pushes the spring rod, the spring rod pushes the baffle, a gap is formed at the position of the baffle and a high-pressure cavity interface, high-pressure air and liquid flow to a low-pressure cavity from the gap, the reset spring rebounds when the pressure is normal, the piston;
2. casing inner wall right-hand member fixed mounting bracing piece, bracing piece central point puts the fixed mounting bearing, turbofan is cup jointed on the bearing right side, it is specific, the bracing piece has limiting displacement to the bearing, the bracing piece has a supporting role to turbofan, the bearing has an installation effect to turbofan, when associated gas flows to low-pressure chamber from high-pressure chamber, it rotates turbofan to respond to the different production stream speed differences of pressure, the rotatory direction that changes the gas-liquid flow motion of turbofan, effectively improve the pressure loss that the gas-liquid flows and reachs the pump barrel, thereby reach and reduce the influence of gas-liquid flow to the check valve, have the effect that does not rely on any power.
Drawings
FIG. 1 is a schematic view of a planer structure according to embodiment 1 of the present invention;
FIG. 2 is a schematic elevation view of the structure of embodiment 1 of the present invention;
FIG. 3 is a perspective view of embodiment 1 of the present invention;
FIG. 4 is a schematic front view of embodiment 2 of the present invention;
in the figure: 100 casing, 110 rubber expansion ring, 115 groove, 120 support rod, 130 turbo fan, 140 bearing, 150 low pressure cavity, 160 scroll bar, 165 spiral blade, 170 associated gas pipeline, 200 air pressure device, 210 base, 220 return spring, 230 piston, 240 seal I, 250 spring rod, 260 baffle, 270 seal II, 280 high pressure cavity.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
Referring to the accompanying drawings 1-3, the downhole associated gas air pressure buffering device provided by the invention comprises a shell 100 and an air pressure device 200, wherein a base 210 is fixedly installed at the bottom of the shell 100, the base 210 is in a cross shape and has the effect of facilitating associated gas to enter a high pressure cavity 280, the air pressure device 200 is fixedly installed at the right side of the base 210, the base 210 has a supporting effect on the air pressure device 200, a piston 230 is slidably connected to the inner wall of the air pressure device 200, the bottom of the piston 230 is fixedly connected to the base 210 through a return spring 220, the return spring 220 stretches a piston 230, a spring rod 250 is fixedly connected to the right side of the piston 230, the piston 230 has a propelling effect on the spring rod 250, a piston core of the piston 230 is processed by high-quality forged steel, a piston rubber is made of nitrile rubber and has heat, oil and water resistant effects, and the root is reinforced by multiple, The oil well has the advantages that the oil well has chemical resistance and abrasion resistance and has the effect of long service life under the oil well condition, the baffle 260 is fixedly connected to the right side of the spring rod 250, the spring rod 250 has the propelling effect on the baffle 260, the bottom of the baffle 260 is bonded with the second sealing strip 270, and the second sealing strip 270 has the sealing effect on the baffle 260;
furthermore, two groups of grooves 115 are respectively formed at two ends of the outer shell 100, the surfaces of the grooves 115 are fixedly sleeved with the rubber expansion rings 110, the rubber expansion rings 110 are provided with four groups, specifically, the grooves 115 have a limiting effect on the rubber expansion rings 110, each rubber expansion ring 110 is composed of an outer ring, a middle expansion ring and an inner ring, the outer ring and the inner ring are common elastic sealing rings, the center of the middle expansion ring is provided with a ring bubble structure, two sides of the middle expansion ring are hollow rings, the outer side of the ring is sealed, the inner side of the ring is open, the outer ring and the inner ring are divided into two parts and are arranged in a ring bubble knot of the middle expansion ring, the gas-liquid leakage between the outer wall of the outer shell 100 and the inner wall of the associated gas pipeline 170 is;
further, a support rod 120 is fixedly mounted at the right end of the inner wall of the casing 100, a bearing 140 is fixedly mounted at the center of the support rod 120, the right side of the bearing 140 is sleeved with the turbofan 130, specifically, the support rod 120 has a limiting effect on the bearing 140, the support rod 120 has a supporting effect on the turbofan 130, the bearing 140 has a mounting effect on the turbofan 130, the turbofan 130 does not rotate by any power, when associated gas flows from the high-pressure cavity 280 to the low-pressure cavity 150, a flow speed difference is generated according to different pressures to rotate the turbofan 130, the rotation of the turbofan 130 changes the moving direction of the gas-liquid flow, the pressure loss of the gas-liquid flow reaching the pump barrel is effectively improved, and therefore the influence of the gas-liquid flow on the one;
further, the outer wall of the air pressure device 200 and the inner wall of the housing 100 form a high pressure cavity 280, specifically, the high pressure cavity 280 is communicated with a high pressure air passage of the associated gas pipeline 170, and the high pressure cavity 280 has a flow guiding function;
further, a low pressure chamber 150 is formed between the inner wall of the housing 100 and the right side of the baffle 260, specifically, the baffle 260 has the function of blocking gas-liquid circulation, and the low pressure chamber 150 has the function of releasing gas-liquid pressure;
further, the surface of the piston 230 is adhered with a first sealing strip 240, and particularly, the first sealing strip 240 has a sealing function to prevent gas and liquid from leaking.
The using process of the invention is as follows: when the present invention is used, workers in the field need to sleeve the rubber expansion ring 110 on the surface of the housing 100, place the air pressure buffer device in the associated gas pipeline 170, the associated gas pipeline 170 is divided into a high pressure region and a low pressure region by the air pressure buffer device, when the pressure in the high pressure region is too high, the air-liquid pressure pushes the piston 230, the piston 230 pushes the spring rod 250, the spring rod 250 pushes the baffle 260, a gap is formed at the interface between the baffle 260 and the high pressure cavity 280, the high pressure air-liquid flows from the gap to the low pressure cavity 150, the return spring 220 rebounds when the pressure is normal, the piston 230 is pulled back, the piston 230 drives the baffle 260 to close the interface of the high pressure cavity 280, the high pressure air-liquid passes through the turbofan 130, and drives the turbofan 130 to rotate, when the air-liquid flow impacts the turbofan 130, the moving direction of the air-liquid flow can be.
Example 2:
referring to the specification and the attached fig. 4, the downhole associated gas air pressure buffering device of the embodiment further comprises a scroll 160 and a helical blade 165;
furthermore, a support rod 120 is fixedly installed at the right end of the inner wall of the housing 100, a bearing 140 is fixedly installed at the center position of the support rod 120, the bearing 140 is sleeved at the center position of the scroll 160, and a spiral blade 165 is welded on the surface of the scroll 160.
The implementation scenario is specifically as follows: those skilled in the art will need to replace the turbofan 130 with the scroll bar 160 and the helical blades 165 in using the present invention.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. An associated gas atmospheric pressure buffer device in pit, includes shell (100) and atmospheric pressure device (200), its characterized in that: the utility model provides a sealing strip is fixed on the casing (100) bottom fixed mounting base (210), base (210) right side fixed mounting pneumatic means (200), pneumatic means (200) inner wall sliding connection piston (230), reset spring (220) fixed connection base (210) are passed through to piston (230) bottom, piston (230) right side fixed connection spring beam (250), spring beam (250) right side fixed connection baffle (260), baffle (260) bottom bonding sealing strip two (270).
2. The downhole associated gas pressure buffer device of claim 1, wherein: two groups of grooves (115) are formed in two ends of the shell (100), rubber expansion rings (110) are fixedly sleeved on the surfaces of the grooves (115), and four groups of rubber expansion rings (110) are arranged.
3. The downhole associated gas pressure buffer device of claim 1, wherein: the support rod (120) is fixedly installed at the right end of the inner wall of the shell (100), the bearing (140) is fixedly installed at the center position of the support rod (120), and the right side of the bearing (140) is sleeved with the turbofan (130).
4. The downhole associated gas pressure buffer device of claim 1, wherein: the outer wall of the air pressure device (200) and the inner wall of the shell (100) form a high-pressure cavity (280).
5. The downhole associated gas pressure buffer device of claim 1, wherein: the inner wall of the shell (100) and the right side of the baffle (260) form a low-pressure cavity (150).
6. The downhole associated gas pressure buffer device of claim 1, wherein: the surface of the piston (230) is adhered with a first sealing strip (240).
7. The downhole associated gas pressure buffer device of claim 1, wherein: the support rod (120) is fixedly installed at the right end of the inner wall of the shell (100), the bearing (140) is fixedly installed at the central position of the support rod (120), the bearing (140) is sleeved with the central position of the worm (160), and the spiral blade (165) is welded on the surface of the worm (160).
8. A method of using the downhole associated gas pressure buffer device of any one of claims 1-7, wherein: the method comprises the following steps:
firstly, sleeving a rubber expansion ring (110) on the surface of a shell (100), placing an air pressure buffering device in an associated gas pipeline (170), and dividing the associated gas pipeline (170) into a high-pressure area and a low-pressure area by the air pressure buffering device;
secondly, when the pressure in high pressure district is too big, gas-liquid pressure promotes piston (230), piston (230) promote spring lever (250), spring lever (250) promote baffle (260), baffle (260) and high-pressure chamber (280) kneck form the gap, high-pressure gas-liquid flows to low-pressure chamber (150) from the gap, reset spring (220) kick-backs when pressure is normal, pull back piston (230), piston (230) drive baffle (260) close high-pressure chamber (280) interface, high-pressure gas-liquid passes through turbofan (130), it is rotatory to drive turbofan (130), can effectively change the direction of gas-liquid flow motion when gas-liquid flow strikes turbofan (130), reduce the speed of gas-liquid flow motion, reduce the influence to the check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664672.8A CN111794716A (en) | 2020-07-10 | 2020-07-10 | Underground associated gas pressure buffering device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664672.8A CN111794716A (en) | 2020-07-10 | 2020-07-10 | Underground associated gas pressure buffering device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111794716A true CN111794716A (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010664672.8A Withdrawn CN111794716A (en) | 2020-07-10 | 2020-07-10 | Underground associated gas pressure buffering device and method |
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| CN (1) | CN111794716A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027796A (en) * | 2021-04-26 | 2021-06-25 | 江苏赛夫特防爆电气有限公司 | Large-diameter explosion-proof type axial flow fan for ship |
| CN113106880A (en) * | 2021-04-24 | 2021-07-13 | 李文超 | Reverse supporting device for bridge gap repair and implementation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650169U (en) * | 2010-02-05 | 2010-11-24 | 江苏工业学院 | Rod pumping well mouth back pressure reducing device |
| CN204114258U (en) * | 2014-07-28 | 2015-01-21 | 凯迈（洛阳）气源有限公司 | A kind of pressure relief valve |
| CN204113233U (en) * | 2014-09-24 | 2015-01-21 | 延长油田股份有限公司定边采油厂 | A kind of down-hole associated gas atmospheric buffer device |
| CN205714121U (en) * | 2016-06-14 | 2016-11-23 | 甘德顺 | Natural gas well start stop apparatus |
| RU2705654C1 (en) * | 2019-03-06 | 2019-11-11 | Игорь Александрович Малыхин | Method to reduce pressure of associated oil gas in annular space of production oil wells |
-
2020
- 2020-07-10 CN CN202010664672.8A patent/CN111794716A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650169U (en) * | 2010-02-05 | 2010-11-24 | 江苏工业学院 | Rod pumping well mouth back pressure reducing device |
| CN204114258U (en) * | 2014-07-28 | 2015-01-21 | 凯迈（洛阳）气源有限公司 | A kind of pressure relief valve |
| CN204113233U (en) * | 2014-09-24 | 2015-01-21 | 延长油田股份有限公司定边采油厂 | A kind of down-hole associated gas atmospheric buffer device |
| CN205714121U (en) * | 2016-06-14 | 2016-11-23 | 甘德顺 | Natural gas well start stop apparatus |
| RU2705654C1 (en) * | 2019-03-06 | 2019-11-11 | Игорь Александрович Малыхин | Method to reduce pressure of associated oil gas in annular space of production oil wells |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106880A (en) * | 2021-04-24 | 2021-07-13 | 李文超 | Reverse supporting device for bridge gap repair and implementation method thereof |
| CN113027796A (en) * | 2021-04-26 | 2021-06-25 | 江苏赛夫特防爆电气有限公司 | Large-diameter explosion-proof type axial flow fan for ship |
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