CN111021995B - A mechanical pumping water drainage gas production wellhead pressurization process string - Google Patents
A mechanical pumping water drainage gas production wellhead pressurization process string Download PDFInfo
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- CN111021995B CN111021995B CN201911312792.5A CN201911312792A CN111021995B CN 111021995 B CN111021995 B CN 111021995B CN 201911312792 A CN201911312792 A CN 201911312792A CN 111021995 B CN111021995 B CN 111021995B
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- pressure valve
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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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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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
- E21B43/34—Arrangements for separating materials produced by the well
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
本发明属于气田增产设备技术领域，公开了一种机抽排水采气井口增压工艺管柱，包括自上而下依次设置且密封连接的内工作筒、外工作筒和套管；套管靠近外工作筒的一端上设置与内工作筒内部连通的连通管线，连通管线上设置第一单向定压阀；内工作筒上设置排气管线，排气管线上设置第二单向定压阀；外工作筒上设置排水管线，排水管线上设置第三单向定压阀；套管内部设置下眼管、抽油泵和油管，外工作筒内部设置上眼管，油管内部设置抽油杆，内工作筒内部设置活塞和光杆。通过井下抽油泵机抽排水，井口通过内、外工作筒加压采气，实现气液分离，采出井筒积液有利于地层出气，同时减少地面气液分离装置，提高低产气量高产水气井生产效率和利用率。
The invention belongs to the technical field of gas field production increase equipment, and discloses a mechanical pumping and drainage gas production wellhead pressurization process pipe column, comprising an inner working cylinder, an outer working cylinder and a casing which are arranged in sequence from top to bottom and are sealed and connected; a connecting pipeline connected to the inner working cylinder is arranged on one end of the casing close to the outer working cylinder, and a first one-way constant pressure valve is arranged on the connecting pipeline; an exhaust pipeline is arranged on the inner working cylinder, and a second one-way constant pressure valve is arranged on the exhaust pipeline; a drainage pipeline is arranged on the outer working cylinder, and a third one-way constant pressure valve is arranged on the drainage pipeline; a lower eye pipe, a pumping pump and an oil pipe are arranged inside the casing, an upper eye pipe is arranged inside the outer working cylinder, a pumping rod is arranged inside the oil pipe, and a piston and a polished rod are arranged inside the inner working cylinder. Through the downhole pumping and drainage, the wellhead is pressurized to produce gas through the inner and outer working cylinders, so as to achieve gas-liquid separation, and the extraction of wellbore liquid is conducive to the formation gas, while reducing the ground gas-liquid separation device, and improving the production efficiency and utilization rate of low gas production and high water production gas wells.
Description
Technical Field
The invention belongs to the technical field of gas field production increasing equipment, and relates to a mechanical pumping drainage gas production wellhead supercharging process tubular column.
Background
With the increase of the natural gas consumption in China, more and more hypotonic and ultra-hypotonic gas wells are put into production, with the increase of development time, the output of the gas well is reduced, and meanwhile, water is discharged from the underground stratum irregularly or continuously, so that the gas well is flooded and cannot be produced. The gas well drainage can be continuous drainage or intermittent drainage, and the period and the drainage amount of the intermittent drainage are not clear; the drainage may be in liquid or foam form.
At present, a foam discharging method, a gas lifting method and the like are adopted to restore the production of a gas well. However, the foam discharging method requires continuous addition of foam discharging agent, and has high production cost; the gas lift valve has more faults and more maintenance procedures, and meanwhile, the gas quantity is required to be more than 1000 square/day, so that the normal production of the gas field and the utilization rate of the gas well are seriously affected.
Disclosure of Invention
The invention aims to overcome the defect that a hypotonic and ultra-hypotonic gas well in the prior art can be flooded due to drainage, and provides a pumping drainage gas production wellhead supercharging process tubular column.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a pumping drainage gas production wellhead supercharging process pipe column comprises an inner working cylinder, an outer working cylinder and a sleeve which are sequentially arranged from top to bottom and are in sealing connection; one end of the inner working cylinder is positioned in the outer working cylinder, and one end of the outer working cylinder is positioned in the sleeve; a communication pipeline communicated with the inside of the inner working cylinder is arranged at one end of the sleeve close to the outer working cylinder, a first one-way constant pressure valve is arranged on the communication pipeline, an exhaust pipeline is arranged on the inner working cylinder, a second one-way constant pressure valve is arranged on the exhaust pipeline, and a drainage pipeline is arranged on the outer working cylinder; a third one-way constant pressure valve is arranged on the drain pipe line; the lower perforated pipe, the oil pump and the oil pipe are arranged in the sleeve, and the lower perforated pipe is sequentially connected with the oil pump, the oil pipe and the outer working cylinder; an upper hole pipe is arranged in the outer working cylinder, one end of the upper hole pipe is connected with the inner wall of one end of the outer working cylinder connected with the oil pipe, and the other end of the upper hole pipe is connected with the inner working cylinder; the oil pipe is internally provided with a sucker rod, and the inner working cylinder is internally provided with a piston and a polished rod; one end of the sucker rod is connected with the inner plunger of the oil pump, the other end of the sucker rod penetrates through the upper eye tube to be connected with one side of the piston, the other side of the piston is connected with one end of the polish rod, and the other end of the polish rod extends out of the inner working cylinder and is connected with the end part of the inner working cylinder in an airtight manner.
The invention is further improved in that:
the end part of one end of the outer working cylinder, which is positioned in the sleeve, is provided with a tapered section, and the end part of the tapered section is connected with the oil pipe and the upper hole pipe.
The communication pipeline comprises a three-way pipeline and a sleeve gas inlet pipeline, the first end of the three-way pipeline is internally communicated with the sleeve gas inlet pipeline, a first gate valve is arranged at the second end of the three-way pipeline, the third end of the three-way pipeline is internally communicated with the inner working cylinder through the sleeve gas inlet pipeline, a second gate valve is arranged at the third end of the three-way pipeline, and the first one-way constant pressure valve is arranged on the sleeve gas inlet pipeline.
And a third gate valve is arranged on one side, far away from the inner working cylinder, of the second one-way constant pressure valve on the exhaust pipe line, and a fourth gate valve is arranged on one side, far away from the outer working cylinder, of the third one-way constant pressure valve on the drain pipe line.
The length of the pipeline between the first one-way constant pressure valve and the second one-way constant pressure valve and the inner working cylinder is smaller than 3cm.
The first gate valve and the second gate valve are in threaded connection with a three-way pipeline, the first one-way constant pressure valve is in threaded connection with a sleeve gas inlet pipeline, the second one-way constant pressure valve and the third gate valve are in threaded connection with an exhaust pipeline, and the third one-way constant pressure valve and the fourth gate valve are in threaded connection with a drainage pipeline.
The polish rod is connected with the end part of the inner working cylinder in an airtight manner through a packing box.
The sleeve is connected with the outer working cylinder through a flange.
The inner working cylinder is in threaded connection with the outer working cylinder.
Compared with the prior art, the invention has the following beneficial effects:
The pumping and draining gas production wellhead supercharging process pipe column of the invention pumps and drains water through the underground oil pump machine, the wellhead is provided with an inner working cylinder, an outer working cylinder and a sleeve, a sucker rod is arranged in an oil pipe, a piston and a polished rod are arranged in the inner working cylinder, one end of the sucker rod is connected with an inner plunger of the oil pump, the other end of the sucker rod penetrates through the upper eye pipe to be connected with one side of the piston, the other side of the piston is connected with one end of the polished rod, the other end of the polished rod extends out of the inner working cylinder and is connected with the end part of the inner working cylinder in an airtight manner, thereby forming a plunger pump, pressurizing gas production is realized through the plunger pump, gas-liquid separation is realized, thus, the accumulated liquid (stratum water) of a shaft is produced, the gas production of stratum is facilitated, and the ground gas-liquid separation device is reduced. The communicating pipe is provided with a first one-way constant pressure valve, so that gas well gas is ensured to smoothly enter the inner working cylinder, and meanwhile, the plunger piston of the inner working cylinder is ensured not to return into the gas well sleeve when the gas is compressed. The exhaust pipe line is provided with a second one-way constant pressure valve to prevent the gas in the exhaust pipe line from flowing back, and the working efficiency of the exhaust pipe line is influenced by the gas compressibility of the inner working cylinder. A third one-way constant pressure valve is arranged on the drain pipe line; the liquid in the drainage pipeline is prevented from flowing back due to high back pressure, and the working efficiency of the oil pump is prevented from being influenced. By adopting the oil pumping unit and the oil well pump to carry out drainage gas production and gas-liquid separation, the energy of the oil pumping unit is fully utilized, and compared with the traditional drainage gas production process, the device has the advantages of simple structure, convenient operation and wide range, and improves the production efficiency and the utilization rate of the high-yield water gas well with the gas yield lower than 1000m 3/d, such as a hypotonic gas well and an ultra-hypotonic gas well.
Further, a tapered section is arranged at one end part of the outer working cylinder, which is positioned in the sleeve, and the end part of the tapered section is connected with the oil pipe and the upper hole pipe; the volume of the outer working cylinder is increased, and the application range of the device is enlarged.
Further, the communication pipeline comprises a tee pipeline and a sleeve gas inlet pipeline, and an interface is reserved through the tee pipeline structure, so that external gas can be conveyed through the interface when the device is needed to be used.
Further, the first one-way constant pressure valve and the second one-way constant pressure valve are as close to the inner working cylinder as possible, and the length of the pipeline is generally smaller than 3cm, so that the efficiency of the whole device is prevented from being reduced due to backflow of the pipeline gas.
Further, the polish rod is connected with the end part of the inner working cylinder in an airtight manner through a packing box; the oil extraction sealing mechanism is fully utilized to prevent the repeated friction between the end part of the inner working cylinder and the polish rod from leaking gas.
Further, the sleeve is connected with the outer working cylinder through the flange, and the structure of the sleeve and the original gas production tree is kept, so that the device can conveniently replace the existing device.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Wherein: 1-a sleeve; 2-upper eye tube; 3-a first gate valve; 4-a second gate valve; 5-flanges; 6-an inner working cylinder; 7-a sleeve gas inlet pipeline; 8-an outer working cylinder; 9-a first one-way constant pressure valve; 10-packing box; 11-polish rod; 12-a second one-way constant pressure valve; 13-a third gate valve; 14-a third one-way constant pressure valve; 15-fourth gate valve; 16-a piston; 17-ground; 18-lower eye tube; 19-an oil pump; 20-oil pipe; 21-sucker rod.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, the pumping drainage gas production wellhead supercharging process pipe column comprises a sleeve 1, an upper eye pipe 2, an inner working cylinder 6, a sleeve gas inlet pipeline 7, an outer working cylinder 8, a packing box 10, a polished rod 11, a piston 16, a lower eye pipe 18, an oil pump 19, an oil pipe 20, an oil pumping rod 21, an exhaust pipeline and a drainage pipeline.
The upper end of the sleeve 1 is connected with the side wall of an outer working cylinder 8 for pressurizing a water and gas production well head through a flange 5, one end of the outer working cylinder 8 is positioned inside the sleeve 1, a sleeve gas port is formed in the sleeve 1 and is connected with the first end of a three-way pipeline, a first gate valve 3 is arranged at the second end of the three-way pipeline, the third end of the three-way pipeline is communicated with one end of a sleeve gas inlet pipeline 7, a second gate valve 4 is arranged at the third end of the three-way pipeline, and the first gate valve 3 and the second gate valve 4 are in threaded connection with the three-way pipeline.
The other end of the sleeve gas inlet pipeline 7 is communicated with the inside of the inner working cylinder 6, a first one-way constant pressure valve 9 is arranged on the sleeve gas inlet pipeline 7, and the first one-way constant pressure valve 9 is in threaded connection with the sleeve gas inlet pipeline 7. The end of the inner working cylinder 6, which is far away from the sleeve gas inlet pipeline 7, stretches into the outer working cylinder 8, the end part of the end of the inner working cylinder 6, which is positioned at the inner part of the outer working cylinder 8, is connected with the inner wall of the outer working cylinder 8 through the upper eye pipe 2, the inner working cylinder 6 is in threaded connection with the upper eye pipe 2, the upper eye pipe 2 is in threaded connection with the inner wall of the outer working cylinder 8, an exhaust port is arranged at the outer end of the inner working cylinder 6, an exhaust pipeline is connected with the exhaust port, a second one-way constant pressure valve 12 and a third gate valve 13 are sequentially arranged on the exhaust pipeline, the second one-way constant pressure valve 12 is positioned between the third gate valve 13 and the inner working cylinder 6, one end part of a polished rod 11, which penetrates through the inner working cylinder 6, is positioned at the outer end of the outer working cylinder 8, is connected with a piston 16, which is positioned at the inner working cylinder 6, the end part of the polished rod 11 is connected with the inner working cylinder 6 through a packing box 10, the piston 16 is in airtight connection with the inner wall of the inner working cylinder 6, and the piston 16 can axially move inside the inner working cylinder 6. Wherein, the first one-way constant pressure valve 9 and the second one-way constant pressure valve 12 are as close to the inner working cylinder 6 as possible, and generally the length of the pipeline between the first one-way constant pressure valve 9 and the second one-way constant pressure valve 12 and the inner working cylinder 6 is less than 3cm, so as to prevent the efficiency of the whole device from being reduced due to the backflow of pipeline gas and the elastic expansion of the gas of the inner working cylinder.
The outer working cylinder 8 is located the outside one end of sleeve pipe 1 and offers the outlet, and the drain pipe is connected with the outlet and sets gradually third one-way constant pressure valve 14 and fourth gate valve 15 on the drain pipe, and third one-way constant pressure valve 14 is located between fourth gate valve 15 and the outer working cylinder 8, and third one-way constant pressure valve 14 and fourth gate valve 15 all with drain pipe threaded connection. The end of the outer working cylinder 8 at one end outside the sleeve 1 is in threaded connection with the side wall of the inner working cylinder 6, the end of the outer working cylinder 8 at one end inside the sleeve 1 is provided with a tapered section, the tapered section is in threaded connection with one end of an oil pipe 20, the other end of the oil pipe 20 is connected with a lower hole pipe 18 through an oil pump 19, and the oil pipe 20 and the lower hole pipe 18 are both positioned inside the sleeve 1. One end of the sucker rod 21 is connected with the piston 16, the other end passes through the outer working cylinder 8 and the oil pipe 20 to be connected with an inner plunger of the oil pump 19, the inner plunger comprises a fixed valve and a traveling valve, and the sucker rod 21 is in threaded connection with the piston 16 and the inner plunger of the oil pump 19.
The working principle and the working process of the device are as follows, and the device is divided into an upper stroke part and a lower stroke part:
Upstroke: the polished rod 11 drives the piston 16 to move upwards, gas well stratum water is discharged along with a downhole deep well pump, enters the outer working cylinder 8 through the upper hole pipe 2, part of water moves upwards along with the piston 16 and enters the inner working cylinder 6 for pressurizing a drainage gas production well head, and when the pressure of the outer working cylinder 8 is greater than the set pressure of the third one-way constant pressure valve 14, the shaft water opens the third one-way constant pressure valve 14 and enters the ground water flow Cheng Guanxian through the fourth gate valve 15; as the piston 16 moves upwards, the gas in the inner working cylinder 6 is compressed, and when the pressure is greater than the set pressure of the second one-way constant pressure valve 12, the gas opens the second one-way constant pressure valve 12 to enter a gas ground pipeline through the third gate valve 13; formation water enters the casing 1 along the formation 17, and enters the pump barrel of the oil pump 19 through the lower eye pipe 18 to open the fixed valve of the inner plunger of the oil pump 19.
The following stroke: the polished rod 11 drives the piston 16 to move downwards, the pressure of the inner working cylinder 6 is reduced, the gas well gas pressure is greater than the set pressure of the first one-way constant pressure valve 9, the gas opens the first one-way constant pressure valve 9 to enter the inner working cylinder 6, gas well water moves downwards along with the piston 16 and enters the inner working cylinder 6 through the upper eye tube 2 to enter the outer working cylinder 8, and when the pressure of the outer working cylinder 8 is greater than the set pressure of the third one-way constant pressure valve 14, the shaft water opens the third one-way constant pressure valve 14 to enter the ground water flow Cheng Guanxian through the fourth gate valve 15; the sucker rod 21 moves down, and opens the traveling valve of the inner plunger of the oil pump 19 to discharge formation water (wellbore fluid) that has entered the oil pump 19 in an upstroke into the oil pipe 20.
The pumping and draining water and gas production wellhead supercharging process pipe column of the invention pumps and drains water through the underground oil well pump, the wellhead is pressurized and produced by a plunger pump formed by the inner working cylinder 6 and the outer working cylinder 8, and gas-liquid separation is realized, thus the produced shaft dropsy is beneficial to stratum gas production, and meanwhile, a ground gas-liquid separation device is reduced, and the production efficiency and the utilization rate of low-gas-yield high-yield water gas wells such as low-permeability and ultra-low-permeability gas wells are improved.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312792.5A CN111021995B (en) | 2019-12-18 | 2019-12-18 | A mechanical pumping water drainage gas production wellhead pressurization process string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312792.5A CN111021995B (en) | 2019-12-18 | 2019-12-18 | A mechanical pumping water drainage gas production wellhead pressurization process string |
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| CN111021995A CN111021995A (en) | 2020-04-17 |
| CN111021995B true CN111021995B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911312792.5A Active CN111021995B (en) | 2019-12-18 | 2019-12-18 | A mechanical pumping water drainage gas production wellhead pressurization process string |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577209A (en) * | 2020-06-03 | 2020-08-25 | 中国石油天然气股份有限公司 | Pressurization device for mechanical pumping drainage gas production well mouth and pressurization method thereof |
| CN115788383B (en) * | 2023-02-03 | 2023-06-30 | 陕西万普隆油气技术服务有限公司 | Gas well suction bubble row integrated liquid discharging device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201412129Y (en) * | 2009-06-02 | 2010-02-24 | 中国石油天然气股份有限公司 | Gas recovery well machine liquid pumping and drainage gas recovery device |
| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
| CN105114043A (en) * | 2015-09-18 | 2015-12-02 | 中国海洋石油总公司 | System and method for increasing recovery ratio of water drainage and gas production by gas lift in deepwater gas field |
| CN211666694U (en) * | 2019-12-18 | 2020-10-13 | 中国石油天然气股份有限公司 | A mechanically pumped drainage wellhead pressurization process pipe string |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2917316A1 (en) * | 2015-11-02 | 2017-05-02 | Bejing Testwell Technology Co. Ltd. | Coalbed methane drainage and recovery equipment |
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- 2019-12-18 CN CN201911312792.5A patent/CN111021995B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201412129Y (en) * | 2009-06-02 | 2010-02-24 | 中国石油天然气股份有限公司 | Gas recovery well machine liquid pumping and drainage gas recovery device |
| CN104074494A (en) * | 2014-07-16 | 2014-10-01 | 檀长江 | Combined-type oil well casing gas recovery device |
| CN105114043A (en) * | 2015-09-18 | 2015-12-02 | 中国海洋石油总公司 | System and method for increasing recovery ratio of water drainage and gas production by gas lift in deepwater gas field |
| CN211666694U (en) * | 2019-12-18 | 2020-10-13 | 中国石油天然气股份有限公司 | A mechanically pumped drainage wellhead pressurization process pipe string |
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