CN113513290B - Same-well reinjection drainage gas production method and tubular column - Google Patents
Same-well reinjection drainage gas production method and tubular column Download PDFInfo
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- CN113513290B CN113513290B CN202010272834.3A CN202010272834A CN113513290B CN 113513290 B CN113513290 B CN 113513290B CN 202010272834 A CN202010272834 A CN 202010272834A CN 113513290 B CN113513290 B CN 113513290B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 83
- 239000012530 fluid Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000009471 action Effects 0.000 description 9
- 230000005484 gravity Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
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- 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
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Abstract
The invention relates to a method for reinjection, drainage and gas production in the same well and a tubular column. The method comprises the steps that under the water-producing gas layer, a cannula sealing cylinder and a bridge joint are sequentially connected under an oil pipe, and the bridge joint enables at least one side under the cannula sealing cylinder to be provided with an opening communicated with the water-producing gas layer; a lower packer is set between the cannula sealing cylinder and the cannula, and is used for sealing the reinjection layer and the water producing gas layer; the liquid level switch valve is positioned on the water-gas producing layer. According to the invention, water produced by the air layer is directly injected into the low-pressure layer, so that the ground treatment is not required, the water production is not required to be consumed, and no extra operation cost is required; the liquid level in the well can be always kept at the lowest state, so that the gas layer productivity can be exerted to the greatest extent.
Description
Technical Field
The invention relates to the field of petroleum engineering gas production, in particular to a drainage gas production method and a tubular column.
Background
The water flooding is caused by the formation water outlet in the gas reservoir exploitation process, so that the production pressure difference of the gas reservoir is reduced, and the yield of the gas reservoir is reduced. At present, the measures of foam drainage, speed pipe, plunger gas lift, pumping and the like are adopted to drain water and produce gas, the technology is relatively mature, and the aims are to drain water stored at the bottom of the well to the ground, reduce bottom hole pressure and recover gas layer yield. However, various drainage and gas production processes generally consume energy, increase investment and operation cost, and are not beneficial to environmental protection.
In view of this, the inventors of the present invention have provided a method and a pipe string for gas production by reinjection, drainage and drainage in the same well, which can achieve gas production without draining water out of the ground when applied to a suitable reinjection layer, and can reduce the cost or investment of drainage to the maximum extent, reduce the influence of flooding on productivity to the maximum extent, and greatly improve the production potential of the gas layer.
Disclosure of Invention
The invention aims to provide a method for back injection and gas production in the same well and a tubular column, which are used for directly injecting water produced by a gas layer into a low-pressure layer in the well, and water is not discharged out of the ground, so that the cost or investment of water discharge consumption is reduced to the maximum extent, and the production potential of a gas layer is improved to the maximum extent.
In order to achieve the above object, the present invention provides a string for producing gas by reinjection, drainage and drainage in the same well, which is applied to a condition that a reinjection layer is positioned below a water-producing gas layer, the string comprising: oil pipe, sleeve pipe, upper packer, liquid level switch valve and lower packer,
the oil pipe is concentrically arranged in the casing, the periphery of the oil pipe close to the lower part is sealed with the casing through an upper packer,
the liquid level switch valve is arranged in the sleeve, below the oil pipe and on the reinjection layer, the periphery of the liquid level switch valve is sealed with the sleeve through a lower packer, and the lower packer is used for sealing the reinjection layer and the water and gas producing layer.
The same well reinjection drainage gas production pipe column, wherein the liquid level switch valve comprises a valve seat and a hollow ball positioned above the valve seat.
The same well reinjection drainage gas production pipe column, wherein the liquid level switch valve further comprises a spring, the lower end of the spring is fixed in the valve seat, and the hollow ball is arranged at the upper end of the spring.
The invention also provides a same-well reinjection drainage gas production method, which adopts the same-well reinjection drainage gas production pipe column applied to the working condition that the reinjection layer is positioned below the water production gas layer, and comprises the following steps:
(1) Setting a sleeve;
(2) The lower packer and the liquid level switch valve are put into the sleeve, and the lower packer is set between the gas layer and the reinjection layer;
(3) And (3) the upper packer and the oil pipe are put into the casing, and the upper packer is set on the gas layer.
The invention also provides a same-well reinjection drainage gas production pipe column which is applied to the working condition that a water-gas producing layer is positioned below a reinjection layer, wherein the pipe column comprises: oil pipe, sleeve pipe, liquid level switch valve, lower packer, cannula sealing cylinder and bridge joint,
the oil pipe is concentrically arranged in the sleeve;
the lower part of the oil pipe is connected with an insertion pipe, the lower part of the insertion pipe is inserted into an insertion pipe sealing cylinder, the lower part of the insertion pipe sealing cylinder is connected with a bridge joint, and the bridge joint enables at least one side of the lower part of the insertion pipe sealing cylinder to be provided with an opening communicated with a water generating gas layer;
a lower packer is set between the cannula sealing cylinder and the cannula, and the lower packer is used for packing a reinjection layer and a water producing gas layer;
the liquid level switch valve is positioned in the sleeve, below the oil pipe and on the water producing gas layer, and is positioned below the bridge joint and communicated with the sleeve.
The same well reinjection drainage gas production pipe column is characterized in that the liquid level switch valve is provided with a valve core, a valve body and a liquid hole, the valve body is a hollow annular valve body and is sleeved on the valve core, and the liquid hole is positioned on the valve core and is opened or closed by the valve body.
The same well reinjection drainage gas production pipe column is characterized in that a stop structure is arranged below the valve body on the valve core.
The same well reinjection drainage gas production pipe column is characterized in that the periphery of the oil pipe and the casing are sealed and isolated through an upper packer.
The invention also provides a same-well reinjection drainage gas production method which is applied to the same-well reinjection drainage gas production pipe column under the working condition of the reinjection layer, wherein the method comprises the following steps:
(1) Setting a sleeve;
(2) The lower packer, the cannula sealing cylinder, the bridge joint and the liquid level switch valve are put into the sleeve, the lower packer is set between the gas layer and the reinjection layer, and the liquid level switch valve is positioned below the gas layer;
(3) And (3) the oil pipe and the cannula are lowered into the sleeve, and the cannula is inserted into the cannula sealing cylinder to form a seal.
In the same-well reinjection drainage gas production method, an upper packer is put in the step (3), and the upper packer is positioned between an oil pipe and a casing.
In summary, the beneficial effects of the invention are as follows:
(1) According to the invention, water produced by the air layer is directly injected into the low-pressure layer, so that the ground treatment is not required, the water production is not required to be consumed, and no extra operation cost is required;
(2) The invention can always maintain the liquid level in the well at the lowest state, thereby bringing the productivity of the gas layer into play.
Drawings
FIG. 1 is a schematic view of a lower drainage gas production column with upper injection when the liquid level is above the liquid level switch valve;
FIG. 2 is a schematic view of the upper and lower drainage gas production string when the liquid level is below the liquid level switch valve;
FIG. 3 is a schematic view of the production string when the liquid level is above the liquid level switch valve;
FIG. 4 is a schematic view of the production string when the liquid level is below the liquid level switch valve;
fig. 5 is a cross-sectional view of a cannula seal cartridge and bridge fitting in a configuration of a lower injection upper drainage gas production string.
Reference numerals illustrate:
1-taking an upper injection and lower drainage pipe column; 11-an oil pipe; 12-sleeve; 13-upper packer; 14-a liquid level switch valve; 141-valve seat; 142-hollow spheres; 143-a spring; 15-lower packer;
2-lower production and injection upper drainage pipe column; 21-an oil pipe; 22-sleeve; 23-upper packer; 24-liquid level switch valve; 25-lower packer; 26-intubation; 27-a cannula seal cartridge; 28-bridge fitting.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
The invention aims to solve the problems of excessive laminated liquid and water production near a well shaft and a well bottom of a gas well, and the choice of a reinjection layer is also important in the same well reinjection drainage gas production method and the pipe column for injecting the underground accumulated liquid into the reinjection layer (namely a low-pressure water layer). Specifically, the choice of reinjection layer is mainly to choose the stratum with low stratum pressure, good permeability, thicker stratum thickness and stable interlayer with the stratum. The stratum pressure of the reinjection layer is lower than the stratum pressure, and meanwhile, the permeability is good, so that the water produced by the stratum can flow into the reinjection layer; the purpose of thicker formations is to have more space to store the reinjected water; the interlayer is stabilized with the gas layer to prevent channeling with the gas layer, thereby resulting in ineffective reinjection. The specific stratum selection needs to be combined with the water body size, physical parameters and the like to carry out simulation calculation, and the technology is very mature in the field of oil reservoir engineering.
The same well reinjection comprises two modes of injection from top to bottom and injection from bottom according to the position relation of the reinjection layer and the water-producing gas layer, wherein the water-producing gas layer is located above the reinjection layer, and the water-producing gas layer is located below the reinjection layer.
Based on the knowledge in the art, the invention provides a method for reinjection, drainage and gas production in the same well and a tubular column.
First embodiment
The first embodiment is directed to a condition in which the reinjection layer is located below the water-producing gas layer. According to fig. 1 and 2, schematic diagrams of the upper injection and lower drainage gas production pipe column are shown when the liquid level is higher than and lower than the liquid level switch valve respectively. The pipe column in the first embodiment is a drainage gas production pipe column 1 with upper and lower injection, and mainly comprises: oil pipe 11, casing 12, upper packer 13, liquid level switch valve 14 and lower packer 15.
The oil pipe 11 is concentrically arranged in the casing 12, and the periphery of the oil pipe 11 close to the lower part is sealed with the casing 12 through the upper packer 13.
The liquid level switch valve 14 is positioned inside the sleeve 12 and below the oil pipe 11, and the space between the periphery of the liquid level switch valve 14 and the sleeve 12 is sealed by a lower packer 15.
Wherein, the packer seals the gas layer and the reinjection layer, the liquid level switch valve 14 is the switch of controlling the reinjection layer, and the pipe column above the gas layer is a conventional gas production pipe column.
Wherein the liquid level switching valve 14 includes a valve seat 141 and a hollow ball 142 positioned above the valve seat 141. The liquid level switch valve is used for controlling the liquid level to be automatically opened and closed, and the principle is that the liquid level switch valve is controlled to be opened and closed by utilizing the buoyancy difference of liquid and gas to the hollow sphere. When the hollow ball 142 of the liquid level switch valve 14 is submerged by liquid, the valve body is kept in an open state due to the buoyancy of the hollow ball, as shown in fig. 1, when the liquid level descends, the hollow ball 142 loses buoyancy when being in gas, and descends under the action of gravity and falls on the sealing conical surface of the valve seat 142, so that the liquid level switch valve 14 is closed, as shown in fig. 2.
The specific design of the liquid level switch valve can be determined according to the density of the liquid, the pressure, the volume and the weight of the hollow sphere, and the spring 143 can be matched to adjust the force if necessary. Specifically, the lower end of the spring 143 is fixed in the valve seat 141, and the hollow ball 142 is seated on the upper end (free end) of the spring 143. The spring is used for balancing and adjusting the difference value of buoyancy, valve ball gravity and pressure.
Second embodiment
A second embodiment is directed to a gas production method employing a water-injection-on-water-off-gas production string, comprising the steps of:
(1) Running the sleeve 12;
(2) The lower packer 15 is lowered into the sleeve 12 together with the liquid level switch valve 14, and the lower packer 15 is set between the gas layer and the reinjection layer;
(3) An upper packer 13 is lowered into the casing 12 with the tubing 11, the upper packer 13 being set in the gas formation.
The working principle of the embodiment is as follows: the upper packer 13 and the lower packer 15 seal the gas layer and the reinjection layer, the liquid level switch valve 14 is a switch for controlling the reinjection layer, and the pipe column above the gas layer is a conventional gas production pipe column. The water in the air layer enters the shaft along with the air, naturally separates under the action of gravity, the air upwards enters the oil pipe 12 to extract the ground, the water automatically flows downwards into the lower reinjection layer (the reinjection layer pressure is lower than the air layer pressure), when the liquid level is lower than the liquid level switch valve 14, the hollow ball 142 is not subjected to the action of buoyancy, the elastic piece 143 is downwards pressed until the hollow ball 143 seals the valve seat 141 under the action of gravity, namely the liquid level switch valve 14 is automatically closed, and the waste caused by the air entering the reinjection layer is prevented (as shown in fig. 2). When the water produced by the gas layer rises to the liquid level above the liquid level switch valve 14, the hollow ball 142 floats upwards under the buoyancy effect, and the liquid level switch valve 14 is automatically opened, so that the liquid level in the shaft is kept at a lower level, the production pressure difference of the gas layer can be kept at the maximum, and the potential of the gas layer can be exerted to the maximum extent.
Third embodiment
The third embodiment is directed to the condition that the reinjection layer is located above the water and gas producing layer. According to fig. 3-5, there are shown schematic diagrams of the lower injection upper drainage gas production column when the liquid level is above and below the liquid level switch valve, and cross-sectional views of the cannula sealing cylinder and the bridge joint, respectively. The pipe column in the third embodiment is a drainage gas production pipe column 2 on the lower production, which mainly comprises: oil pipe 21, sleeve 22, upper packer 23, liquid level switch valve 24, lower packer 25, cannula 26, cannula seal cartridge 27, and bridge fitting 28.
The oil pipe 21 is concentrically arranged inside the casing 22. The lower part of the oil pipe 21 is connected with the cannula 26, the cannula sealing cylinder 27 is inserted below the cannula 26, the bridge joint 28 is connected below the cannula sealing cylinder 27, and at least one side below the cannula sealing cylinder 27 is provided with an opening 281 by the bridge joint 28 for enabling gas in a water and gas producing layer to sequentially enter the cannula sealing cylinder 27, the cannula 26 and the oil pipe 21 through the bridge joint 28.
A lower packer 25 is set between the cannula seal cartridge 27 and the cannula 22 for sealing the reinjection layer from the water producing gas layer.
The level switch valve 24 is located below the bridge fitting and communicates with the sleeve 22. Specifically, the liquid level switch valve 24 has a valve core 241, a valve body 242, and a liquid hole 243, wherein the valve body 242 is a hollow annular valve body and is sleeved on the valve core 241. When the fluid level in the well is kept high, so that the valve body 242 is submerged in the fluid, the buoyancy keeps the valve body 242 open upwards (the fluid hole 243 is opened), and when the fluid level in the well is kept low, the valve body 242 is exposed to the gas, so that the valve body 242 descends under the action of gravity, and the fluid passage is closed (the fluid hole 243 is closed).
Preferably, a stop structure (not shown) is disposed below the valve body 242 on the valve core 241, and the valve body 242 is limited by the stop structure when it descends to a certain height, so as to avoid the valve body 242 from being separated from the valve core 241.
The specific design of the liquid level switch valve can be determined according to the density, pressure and volume and weight of the liquid valve body.
More preferably, the oil pipe 21 is sealed between the periphery and the casing 22 by an upper packer 23.
Fourth embodiment
A fourth embodiment is directed to a gas production method employing a lower production, upper drainage gas production string, comprising the steps of:
(1) Running sleeve 22;
(2) Lower packer 25, together with cannula seal cartridge 27, bridge fitting 28, and fluid level switch valve 24, is lowered into sleeve 22, lower packer 25 is set between the gas formation and the reinjection layer, and fluid level switch valve 24 is positioned below the gas formation;
(3) Tubing 21 and cannula 26 are lowered into cannula 22 and cannula 26 is inserted into cannula seal cartridge 27 to form a seal.
Preferably, the upper packer 23 may be lowered together in step (3), with the upper packer 23 being located between the tubing 21 and the casing 22 (the upper packer 23 may be eliminated as the case may be).
The working principle of the embodiment is as follows: the lower packer 25 seals the gas layer and the reinjection layer, water in the gas layer enters the sleeve pipe along with the gas, naturally separates under the action of gravity, the gas sequentially enters the cannula sealing cylinder 27, the cannula 26 and the oil pipe 22 upwards through the bridge joint 28, then the ground is mined, water in the gas layer is deposited at the bottom of the well under the action of gravity, and the water upwards enters the reinjection layer through the liquid level switch valve 24 downwards under the action of the pressure difference between the production layer and the reinjection layer (the pressure of the reinjection layer is lower than that of the gas layer). The bridge joint 28 is connected with the cannula sealing cylinder 27, and the cannula sealing cylinder 27 and the cannula 26 are matched to form a seal. The bridge fitting functions to cross the flow paths of the gas and water without interference. The liquid level switch valve 24 is used for passing water and not passing gas, so that the liquid level in the shaft is kept at a low level, the productivity of the gas layer is maximized, and the liquid level switch valve 24 also uses the buoyancy difference of the liquid and the gas to the valve control to control the opening and closing of the valve body 242. When the fluid level in the well is kept high, so that the valve body 242 is submerged in the fluid, the buoyancy keeps the valve body 242 open upwards (the fluid hole 243 is opened), and when the fluid level in the well is kept low, the valve body 242 is exposed to the gas, so that the valve body 242 descends under the action of gravity, and the fluid passage is closed (the fluid hole 243 is closed).
In summary, the invention provides a method and a pipe column for producing gas by reinjection, drainage and gas production in the same well, which are used for directly injecting gas layer produced water into a low-pressure layer in the well, designing two pipe columns of upper and lower production injection according to the position of the low-pressure layer, and keeping the liquid level at the minimum all the time by using a liquid level switch valve and no longer draining water out of the ground, thereby reducing the cost or investment of drainage consumption to the maximum extent and improving the production potential of the gas layer to the maximum extent.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (7)
1. The utility model provides a with well reinjection drainage gas production tubular column, its operating mode that is applied to reinjection layer and is located the water gas production layer below, its characterized in that, the tubular column includes: oil pipe, sleeve pipe, upper packer, liquid level switch valve and lower packer,
the oil pipe is concentrically arranged in the casing, the periphery of the oil pipe close to the lower part is sealed with the casing through an upper packer,
the liquid level switch valve is positioned in the sleeve, below the oil pipe and on the reinjection layer, the periphery of the liquid level switch valve is sealed with the sleeve through a lower packer, and the lower packer is used for sealing the reinjection layer and the water-producing gas layer;
the liquid level switch valve can control the on-off of the reinjection layer and the water and gas producing layer according to the height of the liquid level;
the liquid level switch valve comprises a valve seat and a hollow ball positioned above the valve seat;
the liquid level switch valve further comprises a spring, the lower end of the spring is fixed in the valve seat, and the hollow ball is arranged at the upper end of the spring.
2. A method of producing gas by co-well reinjection drainage, which uses the co-well reinjection drainage gas production string according to claim 1, characterized in that the method comprises the following steps:
(1) Setting a sleeve;
(2) The lower packer and the liquid level switch valve are put into the sleeve, and the lower packer is set between the water producing gas layer and the reinjection layer;
(3) And (3) the upper packer and the oil pipe are put into the casing, and the upper packer is set on the water and gas producing layer.
3. The utility model provides a with well reinjection drainage gas production tubular column, its operating mode that is applied to and produces water gas layer and lie in reinjection layer below, its characterized in that, the tubular column includes: oil pipe, sleeve pipe, liquid level switch valve, lower packer, cannula sealing cylinder and bridge joint,
the oil pipe is concentrically arranged in the sleeve;
the lower part of the oil pipe is connected with an insertion pipe, the lower part of the insertion pipe is inserted into an insertion pipe sealing cylinder, the lower part of the insertion pipe sealing cylinder is connected with a bridge joint, and the bridge joint enables at least one side of the lower part of the insertion pipe sealing cylinder to be provided with an opening communicated with a water generating gas layer;
a lower packer is set between the cannula sealing cylinder and the cannula, and the lower packer is used for packing a reinjection layer and a water producing gas layer;
the liquid level switch valve is positioned in the sleeve, below the oil pipe and on the water producing gas layer, and is positioned below the bridge joint and communicated with the sleeve;
the liquid level switch valve can control the on-off of the reinjection layer and the water and gas producing layer according to the height of the liquid level;
the liquid level switch valve is provided with a valve core, a valve body and a liquid hole, wherein the valve body is a hollow annular valve body and is sleeved on the valve core, and the liquid hole is positioned on the valve core and is opened or closed by the valve body.
4. A co-well reinjection drainage gas production string according to claim 3, characterized in that a stop structure is arranged on the valve core below the valve body.
5. The string of co-well reinjection, drainage and production according to claim 3 or 4, wherein the outer periphery of the oil pipe and the casing are sealed by an upper packer.
6. A method of producing gas by co-well reinjection drainage, which employs the co-well reinjection drainage gas production string according to any one of claims 3 to 5, characterized in that the method comprises the steps of:
(1) Setting a sleeve;
(2) The lower packer, the cannula sealing cylinder, the bridge joint and the liquid level switch valve are put into the sleeve, the lower packer is set between the water producing gas layer and the reinjection layer, and the liquid level switch valve is positioned below the water producing gas layer;
(3) And (3) the oil pipe and the cannula are put into the cannula, and the cannula is inserted into the cannula sealing cylinder to form a seal.
7. The method of producing gas by co-well reinjection drainage according to claim 6, wherein in the step (3), an upper packer is simultaneously put in, and the upper packer is located between the oil pipe and the casing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010272834.3A CN113513290B (en) | 2020-04-09 | 2020-04-09 | Same-well reinjection drainage gas production method and tubular column |
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| CN202010272834.3A CN113513290B (en) | 2020-04-09 | 2020-04-09 | Same-well reinjection drainage gas production method and tubular column |
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| CN113513290B true CN113513290B (en) | 2023-05-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2197377C (en) * | 1997-02-12 | 2006-01-31 | Horst Simons | Method and apparatus for hydrocarbon production and water disposal |
| US7195070B2 (en) * | 2004-07-15 | 2007-03-27 | Weatherford/Lamb, Inc. | Method and apparatus for downhole artificial lift system protection |
| NO325857B1 (en) * | 2005-12-12 | 2008-08-04 | Shore Tec Consult As | Method and apparatus for separating and injecting water from a water- and hydrocarbon-containing effluent down into a production well |
| CN107989594A (en) * | 2016-10-26 | 2018-05-04 | 中国石油化工股份有限公司 | A kind of down-hole multilevel separation sucker rod pump same well production-injection method and tubing string |
| CN207568582U (en) * | 2017-08-31 | 2018-07-03 | 中国石油化工股份有限公司 | A kind of beam pumping unit compact downhole oil-water separation device |
| CN108590623B (en) * | 2018-03-19 | 2020-12-01 | 中国石油天然气股份有限公司 | Same-well reinjection process pipe column and method |
| CN109296351B (en) * | 2018-12-10 | 2021-09-17 | 胜利油田胜利泵业有限责任公司 | Water-gas separation system for extraction and injection in same well by using electric submersible pump |
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