CN214741254U - Forced drainage gas production device - Google Patents
Forced drainage gas production device Download PDFInfo
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- CN214741254U CN214741254U CN202121110107.3U CN202121110107U CN214741254U CN 214741254 U CN214741254 U CN 214741254U CN 202121110107 U CN202121110107 U CN 202121110107U CN 214741254 U CN214741254 U CN 214741254U
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Abstract
The utility model discloses a forced drainage gas production device belongs to natural gas technical field. The device includes: the device comprises a gas-liquid separator, an oil well pump, a blowout preventer and an oil pumping unit; a sleeve is arranged in the natural gas well; the blowout preventer is arranged at the wellhead of the natural gas well, the oil pumping unit is arranged on the ground, an oil pipe of the oil pumping unit enters the casing through the blowout preventer, the entering end of the oil pipe is connected with the outlet of the oil pumping pump, and the gas-liquid separator is arranged at the bottom of the casing; the gas-liquid separator includes: the working outer sleeve, the central pipe, the liquid inlet pipe and the spiral pipe; the spiral duct includes: an outer tube, a helical channel, and an inner tube. The utility model discloses in, vapour and liquid separator mainly adopts annular space gravity separation, spiral centrifugal separation and backward flow gravity separation principle, realizes the high-efficient separation of gas-liquid, and the guarantee oil-well pump does not take place the airlock, realizes oil pipe liquid production, and the gas production is held in the sleeve pipe annular space, and supporting high pressure blowout preventer simultaneously ensures safe operation, forces the flowing back through the oil-well pump, reduces the production pressure differential, lets the water flooded well regain newly-grown, resume output.
Description
Technical Field
The utility model relates to a natural gas technology field, in particular to force drainage gas production device.
Background
Natural gas is also buried in underground closed geological structures like crude oil, and some are stored at the same level as crude oil and some exist independently. For natural gas that is stored at the same level as the crude oil, it is produced along with the crude oil. For the single-phase gas only, the gas reservoir is called as a gas reservoir, and the exploitation method of the gas reservoir is very similar to that of crude oil and has special places.
The natural gas density is low and is 0.75-0.8 kg/cubic meter, so that the pressure of a shaft gas column to the bottom of the well is low; the natural gas has low viscosity, and the flow resistance in the stratum and the pipeline is low; and because of the large expansion coefficient, the elastic energy is also large. Therefore, natural gas extraction generally adopts a self-spraying mode. This is basically the same as self-injection oil recovery. However, because the pressure of the gas well is generally higher and natural gas belongs to flammable and explosive gas, the pressure bearing capacity and the sealing performance of the gas production wellhead device are much higher than those of the oil production wellhead device.
In the production of natural gas, the problem of liquid accumulation of a natural gas well occurs, and the liquid accumulation of the natural gas well refers to that when gas phase can not provide enough energy to enable liquid in a shaft to continuously flow out of a wellhead, the liquid accumulation of the natural gas well can increase the back pressure of a gas layer and limit the production capacity of the well, so that a forced drainage gas production device is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art problem, the utility model provides a force drainage gas production device. The technical scheme is as follows: the method comprises the following steps: the device comprises a gas-liquid separator, an oil well pump, a blowout preventer and an oil pumping unit;
a sleeve is arranged in the natural gas well; the blowout preventer is arranged at the wellhead of the natural gas well, the oil pumping unit is arranged on the ground, an oil pipe of the oil pumping unit enters the sleeve through the blowout preventer, the entering end of the oil pipe is connected with the outlet of the oil pumping pump, and the gas-liquid separator is arranged at the bottom of the sleeve;
the gas-liquid separator includes: the working outer sleeve, the central pipe, the liquid inlet pipe and the spiral pipe; the spiral duct includes: an outer tube, a helical channel and an inner tube;
the working outer sleeve is arranged at the bottom of the inner side of the sleeve, the outer pipe is arranged in the working outer sleeve, the inner pipe is arranged in the outer pipe, the spiral channel is arranged between the outer pipe and the inner pipe, the inner pipe is connected with an inlet of the oil pump, the liquid inlet pipe is connected with the bottom of the working outer sleeve, a liquid inlet hole is formed in the side wall of the liquid inlet pipe, the central pipe is arranged in the liquid inlet pipe, and the outer pipe is communicated; the bottom of the inner tube is communicated with a channel between the outer tube and the working outer sleeve.
Further, the working outer sleeve is connected with the liquid inlet pipe through an upper joint.
Further, the bottom of the liquid inlet pipe is connected with a lower joint.
Furthermore, the number of the liquid inlet holes is multiple.
Furthermore, a vent valve is arranged at the joint of the inner pipe and the oil well pump.
Further, the total length of the gas-liquid separator is 3600 mm.
Further, the maximum outer diameter of the gas-liquid separator is 114 mm.
Furthermore, the tee joint and the rubber gate of the blowout preventer are high-pressure tee joints and high-pressure rubber valves, and the high-pressure sealing pressure reaches 27 MPa.
The utility model provides a technical scheme's beneficial effect is: the utility model adopts the gas-liquid separator, oil pipe suction liquid production, sleeve annular gas production, well mouth blowout preventer and oil pumping unit drainage technology, thus achieving the purposes of high-efficiency low-cost liquid drainage, formation pressure conversion into gas output pressure, low cost safety guarantee, and the like; the gas-liquid separator mainly adopts the principles of annular gravity separation, spiral centrifugal separation and backflow gravity separation to realize high-efficiency gas-liquid separation, ensure that an oil well pump does not generate air lock, realize oil pipe suction and liquid production and sleeve annular gas production, and is matched with a high-pressure blowout preventer to ensure safe operation.
Drawings
Fig. 1 is a schematic structural diagram of a forced drainage gas production device provided by the present invention;
fig. 2 is a schematic structural diagram of a gas-liquid separator provided by the present invention.
Reference numerals: 1-a gas-liquid separator; 2-oil well pump; 3-a blowout preventer; 4-pumping unit; 5-natural gas wells; 6-a sleeve; 7-an oil pipe; 8, working outer sleeves; 9 a central tube; 10-a liquid inlet pipe; 11-an outer tube; 12-a helical channel; 13-an inner tube; 14-liquid inlet hole; 15-upper joint; 16-lower joint; 17-air release valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1-2, the forced drainage gas recovery device includes: the device comprises a gas-liquid separator 1, an oil well pump 2, a blowout preventer 3 and an oil pumping unit 4; a casing 6 is arranged in the natural gas well 5; the blowout preventer 3 is arranged at the wellhead of the natural gas well 5, the pumping unit 4 is arranged on the ground, an oil pipe 7 of the pumping unit 4 enters the casing 6 through the blowout preventer 3, and the entering end of the oil pipe is connected with the outlet of the oil well pump 2, and the gas-liquid separator 1 is arranged at the bottom of the casing 6; the gas-liquid separator 1 includes: the working outer sleeve 8, the central pipe 9, the liquid inlet pipe 10 and the spiral pipe; the spiral duct includes: an outer tube 11, a spiral channel 12 and an inner tube 13; the working outer sleeve 8 is arranged at the bottom of the inner side of the sleeve 6, the outer pipe 11 is arranged in the working outer sleeve 8, the inner pipe 13 is arranged in the outer pipe 11, the spiral channel 12 is arranged between the outer pipe 11 and the inner pipe 13, the inner pipe 13 is connected with an inlet of the oil well pump 2, the liquid inlet pipe 10 is connected with the bottom of the working outer sleeve 8, a liquid inlet hole 14 is formed in the side wall of the liquid inlet pipe 10, the central pipe 9 is arranged in the liquid inlet pipe 10, and the outer pipe 11 is communicated; the bottom of the inner pipe 13 communicates with the annulus between the outer pipe 11 and the working envelope 8.
It should be noted that the forced drainage gas production device adopts the technologies of gas-liquid separator 1, oil pipe 7 pumping liquid production, casing 6 annulus gas production, wellhead blowout preventer 3 and oil pumping unit 4 drainage, etc., so as to achieve the purposes of efficient and low-cost liquid drainage, formation pressure conversion into gas output pressure, low cost safety guarantee, etc.; the gas-liquid separator 1 mainly adopts the principles of annular gravity separation, spiral centrifugal separation and backflow gravity separation to realize high-efficiency gas-liquid separation, ensure that the oil well pump 2 does not generate air lock, realize that the oil pipe 7 pumps and produces liquid, and the sleeve 6 produces gas in an annular space, and simultaneously, the high-pressure blowout preventer 3 is matched to ensure safe operation and forcibly discharge liquid through the oil well pump 2, reduce the production pressure difference and ensure that the flooded well recovers new growth and yield.
Further, the working jacket 8 is connected with the liquid inlet pipe 10 through an upper joint 15.
Further, the bottom of the liquid inlet pipe 10 is connected with a lower joint 16.
Further, the number of the liquid inlet holes 14 is plural.
Further, a vent valve 17 is arranged at the connection position of the inner pipe 13 and the oil well pump 2.
Further, the total length of the gas-liquid separator 1 is 3600 mm.
Further, the maximum outer diameter of the gas-liquid separator 1 was 114 mm. The liquid production amount of the applicable well is more than or equal to 23 m/d; the method is applicable to well casings:
and
furthermore, the three-way and rubber gate of the blowout preventer 3 are high-pressure three-way and high-pressure rubber valves, and the high-pressure sealing pressure reaches 27 MPa. The problem that blowout is out of control in the pumping process of the gas well can be well solved.
The utility model discloses a complete work flow can be: during the process that the gas-liquid mixed liquid flows downwards from the liquid inlet pipe 10 to the central pipe 9 during the upstroke of the oil well pump 2, part of large bubbles are separated from the mixed liquid and flow upwards, are discharged from the liquid inlet hole 14 and enter the annular space of the sleeve 6, and the 1 st separation, namely gravity separation, is completed; most of the small bubbles are carried by the liquid and continue to move upwards through the central tube 9, the liquid enters the spiral tube through the upper joint 15, the mixed liquid enters the spiral channel 12, the liquid and the gas simultaneously make circular motion along the axis, the gas with low density approaches to the axis and rises to the lower part of the air release valve 17, the liquid with high density is far away from the axis and approaches to the outer tube 11 to move upwards, and under the action of the suction force and the spiral force of the oil well pump 2, the liquid turns to an annular space between the outer tube 11 and the working outer sleeve 8, at the moment, the 2 nd separation, namely the spiral separation process, is completed, and most of the small bubbles in the mixed liquid are separated from the mixed liquid under the action of the spiral force; in the descending process of the mixed liquid between the outer pipe 11 and the working jacket 8 after 2 times of separation, the residual gas in the mixed liquid rises to the lower part of the air release valve 17 under the action of gravity, thus completing the 3 rd time of separation. The liquid after 3 times of thorough separation enters the oil well pump 2 through the central channel 13 of the spiral pipe, is pumped and is discharged from the oil pipe 7. In the down stroke of the oil well pump 2, the air release valve 17 is opened under the action of liquid feedback force, and the gas gathered at the lower part of the air release valve 17 is discharged from the air release valve 17 into the annular space of the sleeve 6.
It is worth explaining that the forced drainage gas production device is used for pumping, draining and producing gas for low-pressure low-yield wells, high-yield wells and water flooded wells, and external equipment is used for pumping water in the wells, so that the problems that liquid accumulation in the shafts and gas wells are low in energy and cannot normally produce gas can be effectively solved. The problem that the raw water flooded well cannot be exploited is solved, and the problems of low-pressure low-yield well, low high-yield well and frequent production stop and drainage operation are solved. Compared with other conventional water drainage technologies such as foam drainage, gas lift, velocity tube and the like, the forced water drainage and gas production device has the remarkable advantages of no-stop operation, large yield increase and the like. The liquid drainage gas production process is free of chemical addition, the ground treatment is environment-friendly and simple, the ground treatment cost is low, the gas well recovery rate can be greatly improved, normal ground gathering and transportation can be realized by means of the self energy of the gas well, gas and liquid are separately transported, the ground gathering and transportation pipe loss can be greatly reduced, and the operation cost is low.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A forced drainage gas production device is characterized by comprising: the device comprises a gas-liquid separator (1), an oil well pump (2), a blowout preventer (3) and an oil pumping unit (4);
a sleeve (6) is arranged in the natural gas well (5); the blowout preventer (3) is arranged at the wellhead of the natural gas well (5), the oil pumping unit (4) is arranged on the ground, an oil pipe (7) of the oil pumping unit (4) enters the casing (6) through the blowout preventer (3), one entering end of the oil pipe is connected with an outlet of the oil well pump (2), and the gas-liquid separator (1) is arranged at the bottom of the casing (6);
the gas-liquid separator (1) comprises: the working outer sleeve (8), the central pipe (9), the liquid inlet pipe (10) and the spiral pipe; the spiral duct includes: an outer tube (11), a spiral channel (12) and an inner tube (13);
the working outer sleeve (8) is arranged at the bottom of the inner side of the sleeve (6), the outer pipe (11) is arranged in the working outer sleeve (8), the inner pipe (13) is arranged in the outer pipe (11), the spiral channel (12) is arranged between the outer pipe (11) and the inner pipe (13), the inner pipe (13) is connected with an inlet of the oil well pump (2), the liquid inlet pipe (10) is connected with the bottom of the working outer sleeve (8), a liquid inlet hole (14) is formed in the side wall of the liquid inlet pipe (10), the central pipe (9) is arranged in the liquid inlet pipe (10), and the outer pipe (11) is communicated; the bottom of the inner pipe (13) is communicated with the annular space between the outer pipe (11) and the working outer sleeve (8).
2. A forced water drainage gas production unit according to claim 1, characterized in that the working jacket (8) is connected with the liquid inlet pipe (10) by means of an upper joint (15).
3. A forced water drainage gas production device according to claim 1, wherein a lower joint (16) is connected to the bottom of the liquid inlet pipe (10).
4. A forced water drainage gas production device according to claim 1, wherein the number of the liquid inlet holes (14) is plural.
5. A forced water drainage gas production device according to claim 1, wherein a gas release valve (17) is arranged at the connection of the inner pipe (13) and the oil well pump (2).
6. A forced water drainage gas production device according to claim 1, wherein the total length of the gas-liquid separator (1) is 3600 mm.
7. A forced drainage gas recovery device according to claim 1, characterized in that the maximum outer diameter of the gas-liquid separator (1) is 114 mm.
8. A forced water drainage gas production device according to claim 1, wherein the tee joint and rubber gate of the blowout preventer (3) are high-pressure tee joint and high-pressure rubber valves, and the high-pressure sealing pressure reaches 27 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121110107.3U CN214741254U (en) | 2021-05-24 | 2021-05-24 | Forced drainage gas production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121110107.3U CN214741254U (en) | 2021-05-24 | 2021-05-24 | Forced drainage gas production device |
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| Publication Number | Publication Date |
|---|---|
| CN214741254U true CN214741254U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121110107.3U Expired - Fee Related CN214741254U (en) | 2021-05-24 | 2021-05-24 | Forced drainage gas production device |
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| CN (1) | CN214741254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153243A (en) * | 2021-05-24 | 2021-07-23 | 陕西胜鼎泰能源服务有限公司 | Forced drainage gas production device |
-
2021
- 2021-05-24 CN CN202121110107.3U patent/CN214741254U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153243A (en) * | 2021-05-24 | 2021-07-23 | 陕西胜鼎泰能源服务有限公司 | Forced drainage gas production device |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 03-301, 9 / F, South Building, phase II of Taiwei smart chain, No. 8, Tangyan South Road, Xi'an, Shaanxi 710000 Patentee after: Shaanxi shengdingtai Energy Service Co.,Ltd. Address before: Room 22104-x453, 21 / F, unit 2, building 1, Liangli business complex building, Gaoxin 4th Road, high tech Zone, Xi'an City, Shaanxi Province, 710065 Patentee before: Shaanxi shengdingtai Energy Service Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211116 |