CN109488265B - Oil extraction device and method for controlling oil layer pressure by double-layer oil pipe - Google Patents
Oil extraction device and method for controlling oil layer pressure by double-layer oil pipe Download PDFInfo
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- CN109488265B CN109488265B CN201811074907.7A CN201811074907A CN109488265B CN 109488265 B CN109488265 B CN 109488265B CN 201811074907 A CN201811074907 A CN 201811074907A CN 109488265 B CN109488265 B CN 109488265B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Fats And Perfumes (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of oil extraction engineering, belongs to an oil extraction device and method for controlling oil layer pressure by a double-layer oil pipe, and solves the problem of pressure interference among large-span oil layers (300-850 m). The oil pumping unit comprises a casing (1), an oil pumping rod (2), an oil pipe I (3), an oil pipe variable buckle (4), a sieve pipe I (5), an oil pipe II (3 '), a slip packer (6), an oil pipe III (3 '), a plunger (7), a pump cylinder (8), a sieve pipe II (5 ') and a plug (9). According to the invention, an annular space is formed by the casing (1) and the oil pipe II (3'), the upper oil layer fluid enters the well through the annular space and the sieve pipe I (5), and the fluid in the annular space applies a certain pressure to the upper oil layer, so that the upper oil layer is ensured to be produced within a reasonable pressure range. The invention has the advantages of adjusting the pressure interference between oil layers, being suitable for oil wells with sand production on the upper layer and massive gas production on the lower layer, and the like.
Description
The technical field is as follows: the invention relates to the technical field of oil extraction engineering, and belongs to an oil extraction device and method for controlling oil layer pressure by a double-layer oil pipe.
Background art: aiming at the large oil layer span (300-850 m) of some oil fields, if a general oil extraction method is adopted, the pressure requirement of only one oil layer can be met, namely: if the pressure of the upper oil layer is met, the pressure difference of the lower oil layer (the difference between the pressure of the oil layer and the pressure of a liquid column on the oil layer) is small, and the yield of the lower oil layer is small or the lower oil layer does not flow out; if the pressure of the lower oil layer is met, the difference of the upper oil layer is too large, a large amount of crude oil in the upper oil layer can be degassed, a gas cone is generated, and the liquid production amount is influenced. In recent years, some layered oil extraction methods are put into field use, but are only suitable for oil well exploitation with oil layer span below 300m, so that an oil extraction device and method for controlling oil layer pressure by a double-layer oil pipe are researched, pressure control is carried out on a large-span oil layer, production of each oil layer under reasonable pressure is ensured, oil layer productivity is fully exerted, layered oil extraction is realized, and single-well liquid production capacity is improved.
The invention content is as follows: the invention aims to provide an oil extraction device and method for controlling oil layer pressure by a double-layer oil pipe, which are used for eliminating pressure interference between large-span oil layers (300-850 m) and realizing layered oil extraction.
The specific technical content of the invention is as follows: an oil extraction device with double layers of oil pipes for controlling oil layer pressure consists of a sleeve, a sucker rod, an oil pipe I, an oil pipe variable buckle, a sieve pipe I, an oil pipe II, a slip packer, an oil pipe III, a plunger, a pump cylinder, a sieve pipe II and a plug; the upper end of an oil pipe variable thread in the sleeve is connected with a first oil pipe thread, the lower end of the oil pipe variable thread is connected with a first sieve pipe thread, a first sieve pipe thread is connected with a second oil pipe thread and a slip type packer in sequence, a third oil pipe thread is connected with a pump cylinder, a second sieve pipe thread and a plug in sequence, a plunger is connected with a sucker rod thread, and the slip type packer is seated on the lower portion of the bottom of the upper oil layer.
The oil extraction method of the oil extraction device for controlling the oil layer pressure by using the double-layer oil pipe comprises the following steps:
a. firstly, sequentially connecting a slip packer, an oil pipe II with a preset length and a sieve pipe I in a threaded manner and then putting the oil pipe II and the sieve pipe I into a sleeve;
b. secondly, connecting the oil pipe III with the pump cylinder, the sieve pipe II and the plug thread in sequence, and feeding the oil pipe III from the inside of the sieve pipe I;
c. connecting an oil pipe III and the sieve tube I with the lower end screw thread of the oil pipe variable thread respectively, and connecting the oil pipe I with the upper end screw thread of the oil pipe variable thread;
d. setting the slip packer at the lower part of the bottom boundary of the upper oil layer;
e. connecting the plunger with the screw thread of the sucker rod, and putting the plunger into the pump barrel through the oil pipe;
f. the upper and lower oil layer fluids are lifted to the ground through the up-and-down reciprocating motion of the plunger in the pump cylinder.
Compared with the prior art, the invention has the following advantages:
1) the invention can reduce the pressure interference between large span oil layers, ensure that the upper and lower oil layers produce within a reasonable pressure range, give full play to the productivity of the oil layers, realize the layered oil production and improve the liquid production capacity of a single well.
2) The invention is more suitable for the oil well with sand production on the upper layer and large gas production on the lower layer, and the submergence degree of the lower layer can be directly recorded through liquid level testing.
3) The invention effectively improves the stress condition of the oil pipe and improves the operation reliability of the system.
Description of the drawings: FIG. 1 is a schematic view of a process column of the present invention.
The specific implementation mode is as follows: the invention will be further described with reference to the accompanying drawings in which: an oil extraction device with double oil pipes for controlling oil layer pressure consists of a sleeve 1, a sucker rod 2, an oil pipe I3, an oil pipe variable buckle 4, a sieve pipe I5, an oil pipe II 3 ', a slip packer 6, an oil pipe III 3 ', a plunger 7, a pump cylinder 8, a sieve pipe II 5 ' and a plug 9; wherein the upper end of an oil pipe variable thread 4 in the sleeve 1 is connected with a first oil pipe 3 threads, the lower end of the oil pipe variable thread 4 is connected with a first sieve pipe 5 threads, a first sieve pipe 5, a second oil pipe 3 ' and a slip type packer 6 are sequentially connected with threads, a third oil pipe 3 ' is sequentially connected with a pump cylinder 8, a second sieve pipe 5 ' and a plug 9, a plunger 7 is connected with a sucker rod 2 threads, and the slip type packer 6 is seated on the lower part of the bottom of an upper oil layer.
The oil extraction method of the oil extraction device for controlling the oil layer pressure by using the double-layer oil pipe comprises the following steps:
a. firstly, a slip type packer 6, an oil pipe II 3' with a preset length and a sieve pipe I5 are sequentially connected into a casing 1 in a threaded manner;
b. secondly, connecting the oil pipe three 3 'with the pump cylinder 8, the sieve tube two 5' and the plug 9 in turn, and running in from the inside of the sieve tube one 5;
c. respectively connecting an oil pipe three 3' and a sieve pipe one 5 with the lower end of the oil pipe variable buckle 4 in a threaded manner, and connecting the oil pipe one 3 with the upper end of the oil pipe variable buckle 4 in a threaded manner;
d. setting the slip packer 6 at the lower part of the bottom boundary of the upper oil layer;
e. the plunger 7 is connected with the sucker rod 2 by screw threads and is lowered into the pump barrel 8 through the first oil pipe 3;
f. the upper and lower reservoir fluids are lifted to the surface by the up-and-down reciprocating motion of the plunger 7 in the pump cylinder 8.
Claims (2)
1. The utility model provides a double-deck oil pipe controls oil recovery device of oil layer pressure which characterized in that: the oil pumping unit comprises a casing (1), an oil pumping rod (2), an oil pipe I (3), an oil pipe variable buckle (4), a sieve pipe I (5), an oil pipe II (3 '), a slip packer (6), an oil pipe III (3 '), a plunger (7), a pump cylinder (8), a sieve pipe II (5 ') and a plug (9); the upper end of an oil pipe variable buckle (4) in the sleeve (1) is connected with a first oil pipe (3) in a threaded manner, the lower end of the oil pipe variable buckle (4) is connected with a first sieve pipe (5) in a threaded manner, the first sieve pipe (5) is connected with a second oil pipe (3 ') and a slip type packer (6) in a threaded manner in sequence, a third oil pipe (3 ') is connected with a pump cylinder (8), the second sieve pipe (5 ') and a plug (9) in a threaded manner in sequence, a plunger (7) is connected with a sucker rod (2) in a threaded manner, and the slip type packer (6) is sealed at the lower part of the bottom of an upper oil layer in a sitting.
2. A method of recovering oil using an oil recovery device for controlling oil layer pressure using a dual tubing of claim 1, comprising: the method comprises the following steps:
a. firstly, a slip type packer (6), an oil pipe II (3') with a preset length and a sieve pipe I (5) are sequentially screwed and connected into a casing (1);
b. secondly, the oil pipe III (3 ') is connected with the pump barrel (8), the sieve pipe II (5') and the plug (9) in a threaded manner in sequence and is lowered from the inside of the sieve pipe I (5);
c. respectively connecting an oil pipe III (3') and a sieve pipe I (5) with the screw thread at the lower end of the oil pipe variable buckle (4), and connecting the oil pipe I (3) with the screw thread at the upper end of the oil pipe variable buckle (4);
d. setting the slip packer (6) at the lower part of the bottom boundary of the upper oil layer;
e. the plunger (7) is connected with the sucker rod (2) by screw thread and is lowered into the pump barrel (8) through the oil pipe I (3);
f. the upper and lower oil layer fluids are lifted to the ground through the up-and-down reciprocating motion of the plunger (7) in the pump cylinder (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074907.7A CN109488265B (en) | 2018-09-14 | 2018-09-14 | Oil extraction device and method for controlling oil layer pressure by double-layer oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074907.7A CN109488265B (en) | 2018-09-14 | 2018-09-14 | Oil extraction device and method for controlling oil layer pressure by double-layer oil pipe |
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| Publication Number | Publication Date |
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| CN109488265A CN109488265A (en) | 2019-03-19 |
| CN109488265B true CN109488265B (en) | 2021-03-09 |
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Citations (10)
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| WO1998025005A1 (en) * | 1996-12-02 | 1998-06-11 | Kelley & Sons Group International, Inc. | Method and apparatus for increasing fluid recovery from a subterranean formation |
| CN1510249A (en) * | 2002-12-23 | 2004-07-07 | 北京海能海特石油科技发展有限公司 | Completion system of oil and gas wells with regulatably controlling flows of formation fluid or filled fluid in divided sections |
| CN1564902A (en) * | 2001-09-07 | 2005-01-12 | 国际壳牌研究有限公司 | Adjustable well screen assembly |
| CN2718257Y (en) * | 2004-04-10 | 2005-08-17 | 辽河石油勘探局 | Inforced double-runner oil producing device by layer |
| CN103573230A (en) * | 2012-07-24 | 2014-02-12 | 思达斯易能源技术(集团)有限公司 | Selective mining process and equipment thereof |
| CN203452758U (en) * | 2013-07-19 | 2014-02-26 | 中国石油天然气股份有限公司 | ASP flooding multi-layered double-layered tube eccentric separate injection device for separate injection well |
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| CN204457683U (en) * | 2014-12-15 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of pumpingh well cross-layer divides device for picking |
| CN205117312U (en) * | 2015-11-10 | 2016-03-30 | 中国石油化工股份有限公司 | CO2 drives gas -tight technology tubular column |
| CN206309359U (en) * | 2016-11-18 | 2017-07-07 | 中国石油天然气股份有限公司 | Small interlayer water plugging string |
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| US9494000B2 (en) * | 2011-02-03 | 2016-11-15 | Halliburton Energy Services, Inc. | Methods of maintaining sufficient hydrostatic pressure in multiple intervals of a wellbore in a soft formation |
-
2018
- 2018-09-14 CN CN201811074907.7A patent/CN109488265B/en active Active
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| WO1998025005A1 (en) * | 1996-12-02 | 1998-06-11 | Kelley & Sons Group International, Inc. | Method and apparatus for increasing fluid recovery from a subterranean formation |
| CN1564902A (en) * | 2001-09-07 | 2005-01-12 | 国际壳牌研究有限公司 | Adjustable well screen assembly |
| CN1510249A (en) * | 2002-12-23 | 2004-07-07 | 北京海能海特石油科技发展有限公司 | Completion system of oil and gas wells with regulatably controlling flows of formation fluid or filled fluid in divided sections |
| CN2718257Y (en) * | 2004-04-10 | 2005-08-17 | 辽河石油勘探局 | Inforced double-runner oil producing device by layer |
| CN103573230A (en) * | 2012-07-24 | 2014-02-12 | 思达斯易能源技术(集团)有限公司 | Selective mining process and equipment thereof |
| CN203452758U (en) * | 2013-07-19 | 2014-02-26 | 中国石油天然气股份有限公司 | ASP flooding multi-layered double-layered tube eccentric separate injection device for separate injection well |
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| CN204457683U (en) * | 2014-12-15 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of pumpingh well cross-layer divides device for picking |
| CN205117312U (en) * | 2015-11-10 | 2016-03-30 | 中国石油化工股份有限公司 | CO2 drives gas -tight technology tubular column |
| CN206309359U (en) * | 2016-11-18 | 2017-07-07 | 中国石油天然气股份有限公司 | Small interlayer water plugging string |
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| CN109488265A (en) | 2019-03-19 |
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