CN202954747U - Drainage and production string of coal-bed gas well - Google Patents
Drainage and production string of coal-bed gas well Download PDFInfo
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- CN202954747U CN202954747U CN 201220569338 CN201220569338U CN202954747U CN 202954747 U CN202954747 U CN 202954747U CN 201220569338 CN201220569338 CN 201220569338 CN 201220569338 U CN201220569338 U CN 201220569338U CN 202954747 U CN202954747 U CN 202954747U
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Abstract
The utility model discloses a drainage and production string of coal-bed gas well. The drainage and production string of coal-bed gas well comprising a tubing assembly, a pump and a screen pipe arranged under a seam floor. The pump is connected under the tubing assembly, the screen pipe is connected under the pump, the tubing assembly is connected in a production casing, and the bottom of the screen pipe is blocked through a plug. The drainage and production string of coal-bed gas well has the advantages that the structure is simple, gas and water can be effectively separated without a gas anchor, the pump inspection circle can be largely prolonged, the need for continuous and stable production of the coal-bed gas well can be fully met, the production cost can be reduced, and the production aging can be increased.
Description
Technical field
The utility model relates to a kind of coal bed gas well array and adopts tubing string, it is by adjustment and combination to the flow string structure, can carry out in the down-hole efficient gas-water separation, can significantly extend pump detection period, can satisfy the continual and steady needs of producing of coal bed gas well fully, thereby reduced cost of production, improved the production timeliness.
Background technology
Traditional coal bed gas well flow string comprises the oil pipe component that connects successively from top to bottom, pump and screen casing, and gas anchor also need be installed in the top of screen casing.For the impact (air-resistance phenomenon) on tubular pump fixing valve of the methane gas that reduces output, need to the upper part, gas anchor (being used for gas-water separation) be installed at intake (screen casing).
Traditional coal bed gas well flow string is produced its separating effect of the well of tolerance more than 500 cubic metres daily very undesirable in actual use.The one, the standing valve of tubing pump is not closed completely by gases affect to cause leakage serious, the 2nd, be in all the time the compression and expansion state under the pressure that in pump chamber, gas produces and suction in the piston back-and-forth movement process, can not make to be full of liquid in pump chamber, the direct result that both causes is exactly not produce water.Coal bed gas well makes methane gas obtain desorb and passes through the production casing output by continuously carrying out drainage and step-down, in case tubing pump is draining effectively, coal seam water will be assembled in sleeve pipe so, liquid level will raise naturally, consequently the coal seam back pressure raises, and methane gas can not the desorb output.
The utility model content
The purpose of this utility model is, provide a kind of coal bed gas well array to adopt tubing string, it is by adjustment and combination to the flow string structure, can carry out in the down-hole efficient gas-water separation, can significantly extend pump detection period, can satisfy the continual and steady needs of producing of coal bed gas well fully, thereby reduce cost of production, improve the production timeliness.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
A kind of coal bed gas well array is adopted tubing string, and it comprises oil pipe component, and pump and be positioned at the screen casing of seat earth below, pump are connected to the oil pipe component lower end, and screen casing is connected to the below of pump, and described oil pipe component is connected to the inside of production casing, and the bottom of screen casing is stopped up with blocking piece.
Coal bed gas well array as above is adopted tubing string, described oil pipe component comprises oil pipe, and the outside of oil pipe is equipped with tubing centrilizer, is provided with sucker rod and oil pumping rod centering device in oil pipe, oil pumping rod centering device is connected to the outside of sucker rod, and the lower end of sucker rod connects the piston of said pump.
Coal bed gas well array as above is adopted tubing string, described oil pipe component also comprises data cable, described data cable is fixed on the outside of described oil pipe by cable card, tubing centrilizer, cable is positioned in the top of tubing centrilizer, the below of described oil pipe is provided with the PGS that cable connects, the lower end connecting sensor of data cable.
Coal bed gas well array as above is adopted tubing string, and described pump is tubing pump, and described blocking piece is female plug.
Characteristics of the present utility model and advantage are: it is simple in structure, do not need gas anchor can realize efficient gas-water separation yet, can significantly extend pump detection period, can satisfy the continual and steady needs of producing of coal bed gas well fully, thereby reduced cost of production, improved the production timeliness.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation that coal bed gas well array of the present utility model is adopted tubing string.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model proposes a kind of coal bed gas well array and adopt tubing string, it comprises oil pipe component 1, pump 2 and the screen casing 4 that is positioned at seat earth 3 belows, pump 2 is connected to the lower end of oil pipe component 1, screen casing 4 is connected to the below of pump 2, described oil pipe component 1 is connected to the inside of production casing 5, and the bottom of screen casing 4 is stopped up with blocking piece 6.
The row of the present embodiment adopts tubing string does not need gas anchor, be positioned at the below of seat earth 3 due to screen casing 4, for example be positioned at seat earth 3 following 10 meters, coal seam liquid Y enters gathering downwards naturally under Action of Gravity Field after production casing 5, and under the effect of pump 2, enter in oil pipe component 1 from screen casing 4; Methane gas G in the coal seam desorb enter production casing 5 rear on assemble, can not enter under Action of Gravity Field in screen casing 4, so just realized the purpose of gas-water separation.That is to say, the present embodiment be in the situation that also can thoroughly separate air water without gas anchor, thereby guaranteed the continuous and stable production of draining aerogenesis.
According to an embodiment of the present utility model, described oil pipe component 1 comprises oil pipe 1a, the outside of oil pipe 1a is equipped with tubing centrilizer 1b, tubing centrilizer 1b is used for avoiding the electronic pressure gauge data cable to wear and tear in the borehole wall, be provided with sucker rod 1c and oil pumping rod centering device 1d in oil pipe 1a, oil pumping rod centering device 1e is connected to the outside of sucker rod 1c, and the lower end of sucker rod 1c connects the piston 2a of the piston 2 of said pump.In the present embodiment, the coal seam liquid Y that enters screen casing 4 enters in oil pipe 1a by pump 2, and by sucker rod 1c, coal seam liquid Y is retracted to outside pit shaft.Wherein, coal seam liquid is mainly water, can contain a small amount of coal dust.
Described oil pipe component 1 also comprises data cable 1e, described data cable 1e is fixed on the outside of described oil pipe 1a by cable card 1f and tubing centrilizer 1b, cable card 1f is positioned at the top of tubing centrilizer 1b, the below of described oil pipe is provided with the PGS 1g that cable connects, the lower end connecting sensor 1g of data cable 1e.
Described pump 2 can be tubing pump, and described blocking piece 6 can be female plug.
In addition, the top of production casing 5 is provided with surface pipe 5a.
Advantage and the effect of the utility model embodiment are as follows:
1, can effectively carry out gas-water separation in the down-hole, avoid stopping well because of what gases affect caused.
2, simplify flow string, reduce production costs.
3, extend pump detection period, realize continuous and stable production.
4, the tubular column structure of the present embodiment is reasonable, and gas-water separation is respond well, through the experiment to 56 mouthfuls of wells, causes stopping well or inspection pump without a bite well because of gases affect.
5, on market, every gas anchor price is 3500.00 yuan, because the coal bed gas well flow string of the present embodiment does not need gas anchor, therefore, but 3500.00 yuan of every mouthful of well direct saving costs.
The every inspection pump of coal bed gas well once, pump detection and workover expense is 25000.00 yuan, calculates by twice inspection pump every year on average, it is 50000.00 yuan that every mouthful of well was saved the pump detection and workover expense in 1 year.
If gas production before coal bed gas well is examined and will be recovered after pump needs one month at least at every turn, three months at most, every month every mouthful of well cost of production in 20000.00 yuan of left and right (containing the electricity charge, labour cost etc.)
As can be seen from the above data, use the coal bed gas well array of the present embodiment to adopt tubing string, every mouthful of well can save production cost more than 70000.00 yuan every year at least.
The above is only several embodiment of the present utility model, and those skilled in the art can carry out various changes to the utility model embodiment according to application documents are disclosed, modification or combination and do not break away from spirit and scope of the present utility model.
Claims (4)
1. a coal bed gas well array is adopted tubing string, it is characterized in that, described tubing string comprises oil pipe component, pump and be positioned at the screen casing of seat earth below, pump are connected to the oil pipe component lower end, and screen casing is connected to the below of pump, described oil pipe component is connected to the inside of production casing, and the bottom of screen casing is stopped up with blocking piece.
2. coal bed gas well array according to claim 1 is adopted tubing string, it is characterized in that, described oil pipe component comprises oil pipe, the outside of oil pipe is equipped with tubing centrilizer, be provided with sucker rod and oil pumping rod centering device in oil pipe, oil pumping rod centering device is connected to the outside of sucker rod, and the lower end of sucker rod connects the piston of said pump.
3. coal bed gas well array according to claim 2 is adopted tubing string, it is characterized in that, described oil pipe component also comprises data cable, described data cable is fixed on the outside of described oil pipe by cable card, tubing centrilizer, cable is positioned in the top of tubing centrilizer, the below of described oil pipe is provided with the PGS that cable connects, the lower end connecting sensor of data cable.
4. the described coal bed gas well array of according to claim 1 to 3 any one is adopted tubing string, it is characterized in that, described pump is tubing pump, and described blocking piece is female plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220569338 CN202954747U (en) | 2012-10-31 | 2012-10-31 | Drainage and production string of coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220569338 CN202954747U (en) | 2012-10-31 | 2012-10-31 | Drainage and production string of coal-bed gas well |
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| Publication Number | Publication Date |
|---|---|
| CN202954747U true CN202954747U (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220569338 Expired - Lifetime CN202954747U (en) | 2012-10-31 | 2012-10-31 | Drainage and production string of coal-bed gas well |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397858A (en) * | 2013-07-24 | 2013-11-20 | 濮阳泰和油气工程有限公司 | Drainage and production combined sand washing machine for coal bed gas and method for applying drainage and production combined sand washing machine |
| CN104251136A (en) * | 2013-06-28 | 2014-12-31 | 中国石油天然气股份有限公司 | Method for determining coal bed gas well coal submergence |
| CN106884673A (en) * | 2017-02-25 | 2017-06-23 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN107100592A (en) * | 2017-05-12 | 2017-08-29 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
| CN110099868A (en) * | 2016-12-23 | 2019-08-06 | 埃尼股份公司 | For removing the device and method of hydrocarbon from water body |
-
2012
- 2012-10-31 CN CN 201220569338 patent/CN202954747U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251136A (en) * | 2013-06-28 | 2014-12-31 | 中国石油天然气股份有限公司 | Method for determining coal bed gas well coal submergence |
| CN104251136B (en) * | 2013-06-28 | 2017-03-15 | 中国石油天然气股份有限公司 | Method for determining coal bed gas well coal submergence |
| CN103397858A (en) * | 2013-07-24 | 2013-11-20 | 濮阳泰和油气工程有限公司 | Drainage and production combined sand washing machine for coal bed gas and method for applying drainage and production combined sand washing machine |
| CN103397858B (en) * | 2013-07-24 | 2015-11-04 | 濮阳泰和油气工程有限公司 | Coal bed gas extraction associating sand washing machine and application process |
| CN110099868A (en) * | 2016-12-23 | 2019-08-06 | 埃尼股份公司 | For removing the device and method of hydrocarbon from water body |
| CN110099868B (en) * | 2016-12-23 | 2022-03-25 | 埃尼股份公司 | Apparatus and method for removing hydrocarbons from a body of water |
| US11891314B2 (en) | 2016-12-23 | 2024-02-06 | Eni S.P.A. | Apparatus and method for removing hydrocarbons from a body of water |
| CN106884673A (en) * | 2017-02-25 | 2017-06-23 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN106884673B (en) * | 2017-02-25 | 2019-11-12 | 太原理工大学 | A kind of method that goaf coal bed gas pinpoints efficient extraction |
| CN107100592A (en) * | 2017-05-12 | 2017-08-29 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
| CN107100592B (en) * | 2017-05-12 | 2019-07-09 | 中国石油大学(华东) | Coal bed gas multi-machine interaction hydraulic-driven mining process system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130529 |