CN109281641B - Layered gas production pipe column assembly and gas production device with same - Google Patents
Layered gas production pipe column assembly and gas production device with same Download PDFInfo
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- CN109281641B CN109281641B CN201710592591.XA CN201710592591A CN109281641B CN 109281641 B CN109281641 B CN 109281641B CN 201710592591 A CN201710592591 A CN 201710592591A CN 109281641 B CN109281641 B CN 109281641B
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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
- E21B43/14—Obtaining from a multiple-zone well
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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
- E21B43/121—Lifting well fluids
Abstract
The invention provides a layered gas production pipe column assembly and a gas production device with the same, wherein the layered gas production pipe column assembly comprises: the sleeve pipe extends into the two gas production layers, and the inner part of the sleeve pipe is communicated with each gas production layer; the double-pipe packer is arranged in the sleeve and positioned between the two gas production layers to separate the two gas production layers; the drainage pipe column penetrates through the double-pipe packer and is communicated with each gas production layer, a plunger pump is arranged in the drainage pipe column, and the plunger pump can discharge liquid in each gas production layer; the gas production pipe column for gas production penetrates through the double-pipe packer, the inlet of the gas production pipe column is communicated with the gas production layer on the lower layer, and the inlet of the gas production pipe column is closer to the double-pipe packer relative to the inlet on the lower part of the drainage pipe column; the gas in the upper gas layer of the two gas production layers is discharged through the annular space between the sleeve and the drainage pipe column and between the two gas production layers, and the gas in the lower gas layer of the two gas production layers is discharged through the gas production pipe columns. The invention effectively solves the problem of gas exploitation in high-low pressure stratified oil-gas wells in the prior art.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a layered gas production pipe column assembly and a gas production device with the same.
Background
The conventional gas well and coal bed gas well adopt the combined liquid drainage gas production technology which requires that the stratum pressures of all gas layers are similar or have little difference. However, when the heterogeneity of each gas layer is strong and the pressure difference between the gas layers is large, the simultaneous exploitation of multiple gas layers will cause the interference of layer systems, which will affect the normal production. For a gas field with multiple gas layers, in order to meet the requirements of layered pressure test, layered well repair and layered mining of the multiple gas layers and achieve the aims of improving the yield of a single well and achieving the comprehensive development effect, the implementation of the layered mining of different pipe column structures is an effective technological measure. The layered mining can avoid the interlayer contradiction, is beneficial to increasing the utilization degree and the reserve utilization degree of the layer system, and furthest exerts the layered production potential of the gas well.
At present, the layered gas production process at home and abroad mainly comprises an oil casing separate production process, a single oil pipe multilayer separate production process and a double-pipe layered gas production process, but only layered gas production can be realized, and the production efficiency is lower. For example, if water is present in the hydrocarbon well, the water can form a barrier to the hydrocarbons in the hydrocarbon well, affecting production efficiency.
Disclosure of Invention
The invention mainly aims to provide a layered gas production pipe column assembly and a gas production device with the same, and aims to solve the problem of gas production in a layered oil and gas well in the prior art.
To achieve the above object, according to one aspect of the present invention, there is provided a stratified gas production string assembly including: the sleeve extends into the two gas production layers and is communicated with each gas production layer; the double-pipe packer is arranged in the sleeve and is positioned between the two gas production layers so as to separate the two gas production layers; the drainage pipe column penetrates through the double-pipe packer and is communicated with each gas production layer, a plunger pump is arranged in the drainage pipe column, and the plunger pump can discharge liquid in each gas production layer; the gas production pipe column is used for producing gas, the gas production pipe column penetrates through the double-pipe packer, an inlet of the gas production pipe column is communicated with a gas production layer on the lower layer, and the inlet of the gas production pipe column is closer to the double-pipe packer relative to an inlet of the drainage pipe column; the gas in the upper gas layer of the two gas production layers is discharged through the annular space between the sleeve and the drainage pipe column and between the two gas production layers, and the gas in the lower gas layer of the two gas production layers is discharged through the gas production pipe columns.
Further, the drainage pipe column comprises a first drainage pipe column and a second drainage pipe column, the second drainage pipe column is arranged on the double-pipe packer in a penetrating mode, the lower port of the first drainage pipe column is communicated with the gas production layer on the upper layer, the lower port of the second drainage pipe column is communicated with the gas production layer on the lower layer, and the lower port of the first drainage pipe column is connected with the upper port of the second drainage pipe column to form a liquid inlet structure between the first drainage pipe column and the second drainage pipe column.
Further, the drainage pipe column also comprises a first one-way valve which can be communicated from the outside of the drainage pipe column to the inside of the drainage pipe column in a one-way mode, and the first one-way valve is arranged at the liquid inlet structure.
Furthermore, the drain pipe column also comprises a second one-way valve which can be communicated from the lower part of the second drain pipe column to the upper part of the second drain pipe column in a one-way mode, and the second one-way valve is arranged at the lower port of the second drain pipe column.
Furthermore, the drainage pipe column also comprises a sieve pipe, the upper end of the sieve pipe is connected with the lower port of the second drainage pipe column, and the second check valve is close to the upper port of the second drainage pipe column relative to the sieve pipe.
Furthermore, be provided with a plurality of sieve meshes on the circumference lateral wall of screen pipe, the drainage tubular column still includes the end cap, and the head setting is in order to carry out the shutoff with the lower port of screen pipe at the lower extreme of screen pipe.
Furthermore, the plunger pumps comprise two plunger pumps which are respectively arranged in the first drainage pipe column and the second drainage pipe column; the plunger pump is a sub-pumping mixing outlet pump, an upper pump of the sub-pumping mixing outlet pump is arranged in the first drainage pipe column, and a lower pump of the sub-pumping mixing outlet pump is arranged in the second drainage pipe column.
Furthermore, the gas production string comprises a gas production string main body and an oil pipe nipple, the oil pipe nipple is arranged on the double-pipe packer, and the lower end of the gas production string main body is inserted into the double-pipe packer and communicated with the oil pipe nipple.
Further, the gas production string further comprises a sealing structure, and the sealing structure is arranged at the lower end of the gas production string main body to seal a gap between the gas production string main body and the oil pipe nipple.
According to another aspect of the invention there is provided a gas production apparatus comprising a stratified gas production tubing string assembly as described above and a dual wellhead assembly connected to the stratified gas production tubing string assembly.
By applying the technical scheme of the invention, when the layered gas production pipe column assembly is adopted for gas production, the liquid in each gas production layer is discharged, so that the gas blocked in the liquid is easy to produce, the gas production efficiency of the multilayer gas production layers is greatly improved, and particularly when the gas amount in the gas production layers is less, the gas production efficiency is high, and the effect is more obvious. The technical scheme of the invention effectively solves the problem of gas exploitation in high-low pressure stratified oil-gas wells in the prior art.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a first embodiment of a stratified gas production string assembly according to the present invention.
Wherein the figures include the following reference numerals:
10. a sleeve; 20. a double-pipe packer; 30. a drain string; 31. a first drain string; 32. a second drain string; 33. a first check valve; 34. a second one-way valve; 35. a plunger pump; 36. a screen pipe; 37. a plug; 40. a gas production string; 41. a gas production string main body; 42. an oil pipe nipple; 43. and (5) sealing the structure.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
As shown in fig. 1, the stratified gas production pipe column assembly of the first embodiment includes: a casing 10, a double packer 20, a drain string 30 and a gas production string 40 for producing gas. The sleeve 10 extends into two gas production layers, and the sleeve 10 is communicated with each gas production layer. A dual packer 20 is disposed within the casing 10 between the two gas production zones to separate the two gas production zones. The water drainage pipe column 30 penetrates through the double-pipe packer 20 and is communicated with each gas production layer, a plunger pump 35 is arranged in the water drainage pipe column 30, and liquid in each gas production layer can be drained by the plunger pump 35. The gas production string 40 passes through the double packer 20, the inlet of the gas production string 40 is communicated with the gas production zone of the lower layer, and the inlet of the gas production string 40 is closer to the double packer 20 than the inlet of the drainage string 30. The gas in the upper gas layer of the two gas production layers is discharged through the annular space between the sleeve 10 and the drainage pipe column 30 and the gas production pipe column 40, and the gas in the lower gas layer of the two gas production layers is discharged through the gas production pipe column 40.
By applying the technical scheme of the first embodiment, when the layered gas production pipe column assembly is adopted for gas production, liquid in each gas production layer is discharged, so that gas blocked in the liquid is easy to produce, the gas production efficiency of the multilayer gas production layers is greatly improved, and particularly when the gas amount in the gas production layers is small, the gas production efficiency is high, and the effect is more obvious. The technical scheme of this embodiment has solved the gas exploitation problem in the layering oil gas well among the prior art effectively.
As shown in fig. 1, in the technical solution of the first embodiment, the drainage string 30 includes a first drainage string 31 and a second drainage string 32, the second drainage string 32 is inserted into the double-pipe packer 20, a lower port of the first drainage string 31 is communicated with an upper gas production layer, a lower port of the second drainage string 32 is communicated with a lower gas production layer, and a lower port of the first drainage string 31 is connected with an upper port of the second drainage string 32 to form a liquid inlet structure therebetween. The liquid inlet structure is arranged so that the liquid in the upper gas layer can be discharged through the first drain pipe column 31. The second drainage pipe column 32 is arranged to realize that the liquid in the lower gas layer is drained to the first drainage pipe column 31 through the second drainage pipe column 32 and then is drained through the first drainage pipe column 31.
As shown in fig. 1, in the first embodiment, the drain column 30 further includes a first check valve 33 that can be communicated from the outside of the drain column 30 to the inside of the drain column 30 in a one-way manner, and the first check valve 33 is disposed at the liquid inlet structure. The provision of the first check valve 33 prevents the liquid in the upper gas layer from flowing into the first drain column 31 and then flowing back to the outside of the first drain column 31. The first check valve 33 is disposed at the liquid inlet structure, so that the drain column 30 is compact in structure and does not need to be separately provided with other structures.
As shown in fig. 1, in the first embodiment, the drain column 30 further includes a second check valve 34 capable of one-way communication from the lower portion of the second drain column 32 to the upper portion of the second drain column 32, and the second check valve 34 is disposed at the lower port of the second drain column 32. The second check valve 34 is arranged so that the liquid in the lower gas layer does not flow back out of the second drain string 32 after entering the second drain string 32.
As shown in fig. 1, in the first embodiment, the drain string 30 further includes a screen 36, an upper end of the screen 36 is connected to a lower port of the second drain string 32, and the second check valve 34 is close to the upper port of the second drain string 32 relative to the screen 36. The provision of the screen 36 prevents large particles of the gas-descending formation from entering the interior of the second drain string 32 and even into the plunger pump 35 and damaging the plunger pump 35.
As shown in fig. 1, in the first technical solution of the embodiment, a plurality of sieve holes are arranged on the circumferential side wall of the sieve tube 36, and the drain pipe column 30 further includes a plug 37, wherein the plug 37 is arranged at the lower end of the sieve tube 36 to plug the lower port of the sieve tube 36. Due to the arrangement of the plug 37, objects at the bottom of the lower gas layer enter the second drainage pipe column 32, and the circumferential side wall of the sieve tube 36 is provided with a structure with a plurality of sieve holes, so that liquid enters the sieve tube 36 from the circumferential direction, and therefore, fewer particles enter the second drainage pipe column 32.
As shown in fig. 1, in the first embodiment, the plunger pump 35 is a separate pumping and mixing pump, an upper pump of the separate pumping and mixing pump is disposed in the first drain pipe column 31, and a lower pump of the separate pumping and mixing pump is disposed in the second drain pipe column 32. The arrangement of the separate pumping and mixing pump enables one pump to realize upper and lower layer gas production, and the structure is convenient to install and low in processing cost.
As shown in fig. 1, in the technical solution of the first embodiment, the gas production string 40 includes a gas production string main body 41 and a tubing nipple 42, the tubing nipple 42 is disposed on the double packer 20, and the lower end of the gas production string main body 41 is inserted into the double packer 20 and is communicated with the tubing nipple 42. The arrangement of the structure facilitates the maintenance of the gas production string 40. For example, when the column body 41 is damaged, the column body 41 may be replaced by detaching the column body 41.
As shown in fig. 1, in the first technical solution of the embodiment, the gas production string 40 further includes a sealing structure 43, and the sealing structure 43 is disposed at the lower end of the gas production string main body 41 to seal a gap between the gas production string main body 41 and the tubing nipple 42. The seal 43 is provided so that no leakage occurs at the connection between the production string body 41 and the tubing nipple 42.
The difference between the solution of the second embodiment and the first embodiment is that the plunger pumps 35 include two plunger pumps 35, and the two plunger pumps 35 are respectively disposed in the first drain pipe column 31 and the second drain pipe column 32. The two plunger pumps 35 are arranged so that the two plunger pumps 35 can independently pump the liquid in the upper air layer and the lower air layer.
The stratified production tubing string assembly of example two comprises: a casing 10, a double packer 20, a drain string 30 and a gas production string 40 for producing gas. The sleeve 10 extends into two gas production layers, and the sleeve 10 is communicated with each gas production layer. A dual packer 20 is disposed within the casing 10 between the two gas production zones to separate the two gas production zones. The water drainage pipe column 30 penetrates through the double-pipe packer 20 and is communicated with each gas production layer, a plunger pump 35 is arranged in the water drainage pipe column 30, and liquid in each gas production layer can be drained by the plunger pump 35. The gas production string 40 passes through the double packer 20, the inlet of the gas production string 40 is communicated with the gas production zone of the lower layer, and the inlet of the gas production string 40 is closer to the double packer 20 than the inlet of the drainage string 30. The gas in the upper gas layer of the two gas production layers is discharged through the annular space between the sleeve 10 and the drainage pipe column 30 and the gas production pipe column 40, and the gas in the lower gas layer of the two gas production layers is discharged through the gas production pipe column 40.
By applying the technical scheme of the second embodiment, when the layered gas production pipe column assembly is adopted for gas production, liquid in each gas production layer is discharged, so that gas blocked in the liquid is easy to produce, the gas production efficiency of the multilayer gas production layers is greatly improved, and particularly when the gas amount in the gas production layers is small, the gas production efficiency is high, and the effect is more obvious. The technical scheme of this embodiment has solved the gas exploitation problem in the high low pressure layering oil gas well among the prior art effectively.
In the second technical solution of the embodiment, the drainage pipe column 30 includes a first drainage pipe column 31 and a second drainage pipe column 32, the second drainage pipe column 32 is arranged on the double-pipe packer 20 in a penetrating manner, a lower port of the first drainage pipe column 31 is communicated with a gas production layer on an upper layer, a lower port of the second drainage pipe column 32 is communicated with a gas production layer on a lower layer, and a lower port of the first drainage pipe column 31 and an upper port of the second drainage pipe column 32 are sleeved with each other and form a liquid inlet structure therebetween. The liquid inlet structure is arranged so that the liquid in the upper gas layer can be discharged through the first drain pipe column 31. The second drainage pipe column 32 is arranged to realize that the liquid in the lower gas layer is drained to the first drainage pipe column 31 through the second drainage pipe column 32 and then is drained out of the shaft through the first drainage pipe column 31.
In the second technical solution, the drain string 30 further includes a first check valve 33 capable of one-way flowing from the outside of the drain string 30 to the inside of the drain string 30, and the first check valve 33 is disposed at the liquid inlet structure. The provision of the first check valve 33 prevents the liquid in the upper gas layer from flowing into the first drain column 31 and then flowing back to the outside of the first drain column 31. The first check valve 33 is disposed at the liquid inlet structure, so that the drain column 30 is compact in structure and does not need to be separately provided with other structures.
In the second technical solution, the drain column 30 further includes a second check valve 34 capable of one-way communication from the lower portion of the second drain column 32 to the upper portion of the second drain column 32, and the second check valve 34 is disposed at the lower port of the second drain column 32. The second check valve 34 is arranged so that the liquid in the lower gas layer does not flow back out of the second drain string 32 after entering the second drain string 32.
In the second embodiment, the drain string 30 further includes a screen 36, the upper end of the screen 36 is connected to the lower port of the second drain string 32, and the second check valve 34 is close to the upper port of the second drain string 32 relative to the screen 36. The provision of the screen 36 prevents large particles of the gas-descending formation from entering the interior of the second drain string 32 and even into the plunger pump 35 and damaging the plunger pump 35.
In the second technical solution of the embodiment, a plurality of sieve holes are arranged on the circumferential side wall of the sieve tube 36, and the drain pipe column 30 further includes a plug 37, wherein the plug 37 is arranged at the lower end of the sieve tube 36 to plug the lower port of the sieve tube 36. Due to the arrangement of the plug 37, objects at the bottom of the lower gas layer enter the second drainage pipe column 32, and the circumferential side wall of the sieve tube 36 is provided with a structure with a plurality of sieve holes, so that liquid enters the sieve tube 36 from the circumferential direction, and therefore, fewer particles enter the second drainage pipe column 32.
In the second technical scheme of the embodiment, the gas production string 40 comprises a gas production string main body 41 and an oil pipe nipple 42, the oil pipe nipple 42 is arranged on the double-pipe packer 20, and the lower end of the gas production string main body 41 is inserted into the double-pipe packer 20 and is communicated with the oil pipe nipple 42. The arrangement of the structure facilitates the maintenance of the gas production string 40. For example, when the column body 41 is damaged, the column body 41 may be replaced by lifting up and detaching the column body 41.
In the second technical solution of the embodiment, the gas production string 40 further includes a sealing structure 43, and the sealing structure 43 is disposed at the lower end of the gas production string main body 41 to seal a gap between the gas production string main body 41 and the tubing nipple 42. The seal 43 is provided so that no leakage occurs at the connection between the production string body 41 and the tubing nipple 42.
The present application further provides a gas production apparatus comprising a dual tubing wellhead assembly connected to the stratified gas production tubing string assembly, connecting and sealing the drainage tubing string 30, the gas production tubing string 40 and the casing 10, and isolating them into 3 independent spaces. The layered gas production pipe column assembly is the layered gas production pipe column assembly.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation 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 above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A stratified gas production string assembly, comprising:
the sleeve (10) extends into two gas production layers, and the interior of the sleeve (10) is communicated with each gas production layer;
a dual packer (20), said dual packer (20) being disposed within said casing (10) and between two of said gas producing zones to isolate said two gas producing zones;
the drainage pipe column (30) penetrates through the double-pipe packer (20) and is communicated with each gas production layer, a plunger pump (35) is arranged in the drainage pipe column (30), and the plunger pump (35) can discharge liquid in each gas production layer;
the gas production string (40) is used for producing gas, the gas production string (40) penetrates through the double-pipe packer (20), the inlet of the gas production string (40) is communicated with the gas production layer of the lower layer, and the inlet of the gas production string (40) is closer to the double-pipe packer (20) relative to the inlet of the lower part of the drainage string (30);
and gas in the upper gas layer of the two gas production layers is discharged through an annulus between the sleeve (10) and the drainage pipe column (30) and between the gas production pipe columns (40), and gas in the lower gas layer of the two gas production layers is discharged through the gas production pipe columns (40).
2. The stratified gas production pipe column assembly according to claim 1, wherein the drainage pipe column (30) comprises two upper and lower parts, namely a first drainage pipe column (31) and a second drainage pipe column (32), the second drainage pipe column (32) is arranged on the double-pipe packer (20) in a penetrating manner, the lower port of the first drainage pipe column (31) is communicated with the gas production layer on the upper layer, the lower port of the second drainage pipe column (32) is communicated with the gas production layer on the lower layer, and the lower port of the first drainage pipe column (31) is connected with the upper port of the second drainage pipe column (32) to form a liquid inlet structure between the two.
3. A stratified gas production string assembly according to claim 2, wherein the drain string (30) further comprises a first non-return valve (33) being one-way passable from outside the drain string (30) to inside the drain string (30), the first non-return valve (33) being provided at the liquid intake structure.
4. A stratified gas production string assembly according to claim 2, wherein the drain string (30) further comprises a second one-way valve (34) being one-way communicable from a lower portion of the second drain string (32) to an upper portion of the second drain string (32), the second one-way valve (34) being provided at a lower port of the second drain string (32).
5. A stratified production string assembly according to claim 4, wherein the drain string (30) further comprises a screen (36), the upper end of the screen (36) being connected to the lower port of the second drain string (32), and the second one-way valve (34) being adjacent the upper port of the second drain string (32) relative to the screen (36).
6. A stratified gas production string assembly according to claim 5, wherein the screen (36) is provided with a plurality of screen holes in its circumferential side wall, the drainage string (30) further comprising a plug (37), the plug (37) being provided at the lower end of the screen (36) to plug the lower port of the screen (36).
7. A stratified gas production string assembly according to claim 1, wherein the gas production string (40) comprises a gas production string body (41) and a tubing nipple (42), the tubing nipple (42) being provided on the dual packer (20), the lower end of the gas production string body (41) being inserted into the dual packer (20) and communicating with the tubing nipple (42).
8. A stratified gas production string assembly according to claim 7, wherein the gas production string (40) further comprises a sealing structure (43), the sealing structure (43) being provided at the lower end of the gas production string body (41) to seal a gap between the gas production string body (41) and the tubing nipple (42).
9. A gas production installation comprising a stratified gas production string assembly and a dual-barrelled wellhead assembly connected to the stratified gas production string assembly, wherein the stratified gas production string assembly is as claimed in any one of claims 1 to 8.
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| CN201710592591.XA CN109281641B (en) | 2017-07-19 | 2017-07-19 | Layered gas production pipe column assembly and gas production device with same |
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| CN110017138A (en) * | 2019-05-08 | 2019-07-16 | 中国科学院武汉岩土力学研究所 | Air water multilayer sampling method and device in a kind of drilling |
| CN113550720B (en) * | 2021-09-23 | 2021-12-21 | 中煤科工集团西安研究院有限公司 | Multi-source coal-based gas layered pressure control independent metering drainage and mining device and method |
| CN116422019B (en) * | 2023-06-14 | 2023-09-01 | 西安荣达石油工程有限公司 | Petroleum logging gas sample dust filtering device |
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| CN1169502A (en) * | 1996-06-21 | 1998-01-07 | 窦宏恩 | Method for eliminating effect of gas and water while extracting crude oil |
| CN2866812Y (en) * | 2005-10-18 | 2007-02-07 | 中国石油天然气股份有限公司 | Natural gas well separate fracturing merging-layer extracting integral tubelar column |
| RU2477367C1 (en) * | 2011-09-07 | 2013-03-10 | Открытое акционерное общество "Пермнефтемашремонт" | Method of simultaneous stage operation and pumping of two formations with one well, and device for its implementation |
| CN104879097A (en) * | 2015-06-12 | 2015-09-02 | 中国海洋石油总公司 | Gas well production string provided with double parallel pipes |
| CN104989325B (en) * | 2015-06-12 | 2017-10-13 | 中国海洋石油总公司 | A kind of method using two-tube gas well liquid loading tubing string gas production arranged side by side |
| CN105649578B (en) * | 2016-01-29 | 2018-11-13 | 西南石油大学 | Coal bed gas straight well bilayer separate pressure production method and its device |
| CN205618138U (en) * | 2016-05-03 | 2016-10-05 | 北京泰斯特威尔技术有限公司 | Double -barrelled negative pressure drainage gas production equipment |
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