CN202954792U - Anti-blocking filtering screen pipe assembly of coal-bed gas well - Google Patents
Anti-blocking filtering screen pipe assembly of coal-bed gas well Download PDFInfo
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- CN202954792U CN202954792U CN 201220568089 CN201220568089U CN202954792U CN 202954792 U CN202954792 U CN 202954792U CN 201220568089 CN201220568089 CN 201220568089 CN 201220568089 U CN201220568089 U CN 201220568089U CN 202954792 U CN202954792 U CN 202954792U
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Abstract
The utility model discloses an anti-blocking filtering screen pipe assembly of a coal-bed gas well. The screen pipe assembly comprises a rubber screen pipe; a nylon pad net and a metal screen are sequentially coated on the outer side of the rubber screen pipe; and an upper joint and a lower joint are respectively connected with the upper end and the lower end of the rubber screen pipe. The anti-blocking filtering screen pipe assembly of the coal-bed gas well can efficiently prevent the screen pipe from being blocked, fully prolong the service life of the screen pipe, improve filtering effect and fully meet the need of continuous and stable production of the coal-bed gas well, so that problems, caused by screen pipes being blocked, of failure in operation and examination of the well and the pump are reduced, the production cost can be reduced and production effectiveness can be improved.
Description
Technical field
The utility model relates to a kind of coal bed gas well block-proof type filter sieve tube assembly, and it is applicable to the coal bed gas well array and adopts production.
Background technology
The screen casing that coal bed gas well is used at present all is arranged on filter screen or filter core on metallic framework, screen casing enters the intake of pump barrel as liquid, once filter screen or filter core are stopped up by coal dust, liquid can't enter pump barrel also just can't produce water, and this situation once to occur will be irreversible, only have by pump detection and workover flow string all out cleaned or changes screen casing and resume production.Coal bed gas well makes methane gas obtain desorb and passes through the production casing output by continuously carrying out drainage and step-down, once stop producing water, coal seam water will be assembled in sleeve pipe so, and liquid level will raise naturally, consequently the coal seam back pressure raises, and methane gas can not the desorb output.
In addition, if change suitable screen pack, at most also can only the proper extension screen casing filter net jam cycle, can not fundamentally solve the screen casing blockage problem.
Therefore, in order to overcome above-mentioned defect, be necessary to develop coal bed gas well block-proof type filter sieve tube assembly of the present utility model.
The utility model content
The purpose of this utility model is, a kind of coal bed gas well block-proof type filter sieve tube assembly is provided, it can effectively prevent that screen casing from stopping up, can fully extend screen casing application life, improve filter effect, can meet the continual and steady needs of producing of coal bed gas well fully, thereby reduced, because of what coal dust stopped up that screen casing causes, stop the well pump detection and workover, can reduce production costs, 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 block-proof type filter sieve tube assembly, described screen assembly comprises the rubber screen casing, and the outside of rubber screen casing is coated with nylon cushion net and metal screen successively, and the upper and lower end of rubber screen casing is connected with respectively upper and lower joint.
Coal bed gas well block-proof type filter sieve tube assembly as above, described metal screen is 30 order stainless steel filtering nets.
Coal bed gas well block-proof type filter sieve tube assembly as above, described nylon cushion net is 8 order nylon cushion nets.
Coal bed gas well block-proof type filter sieve tube assembly as above, the top of described screen assembly is connected with the flat box cupling, and below is connected with the screen casing plug.
Characteristics of the present utility model and advantage are:
1, it is replaced by screen casing steel body skeleton of the prior art in the rubber screen casing of the present embodiment, there is flexible rubber screen pipe and there is self-cleaning function, when screen pack stops up, the elastic characteristic self possessed by the rubber screen casing realizes that screen casing does contraction, expansion action, the coal dust that makes to be attached on filter screen is broken away from filter screen, make the screen casing screen pack from new recovery passage and filtering function, that is to say, this screen assembly can effectively avoid coal dust to stop up screen casing, has avoided examining pump because of the well that stops that coal dust obstruction screen casing causes.
2, reduce production costs.
3, extend pump detection period, realize continuous and stable production.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, in below describing embodiment, the accompanying drawing of required use is briefly described, 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 of coal bed gas well block-proof type filter sieve tube assembly of the present utility model.
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.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of coal bed gas well block-proof type filter sieve tube assembly the utility model proposes, it comprises rubber screen casing 1, and the outside of rubber screen casing 1 is coated with nylon cushion net 2 and metal screen 3 successively, and the upper and lower end of rubber screen casing 1 is connected with respectively upper and lower joint 4,5.
In the present embodiment, because rubber screen casing 1 is to adopt rubber to make, rubber tube is provided with a plurality of boring, utilize rubber to there are flexible characteristics, the screen assembly of the present embodiment in use for some time, when filter screen is almost blocked, when its feed liquor amount is less than the amount of pumping into, rubber screen casing 1 is the meeting shrinkage strain under the effect of suction, when plunger stops up suction, on whole screen assembly, remaining a small amount of passage can continue to the interior feed flow of rubber screen casing 1, the needs that reset to meet the rubber screen tubular elastic, and the coal dust that such contraction and expansion make to be attached on screen pack just can break away from filter screen, make filter screen again recover passage and filtering function.Therefore, use the screen assembly of the present embodiment can significantly extend pump detection period, can meet the continual and steady needs of producing of coal bed gas well fully, thereby reduce cost of production, improved the production timeliness.Wherein, due to larger boring being arranged on rubber screen casing 1, directly clad metal filter screen 3 can cause the metal screen breakage because of unbalance stress, and 2, nylon cushion net has played the effect of balanced support, protection metal screen 3.
The coal bed gas well block-proof type filter sieve tube of the present embodiment is particularly suitable for the vertical well fracture well, because the type coal bed gas well pulverized coal particle is tiny, can carry out effective sorting to coal dust by the screen casing filter screen, realizes high efficiency filter.
According to an embodiment of the present utility model, described metal screen 3 can be 30 order stainless steel filtering nets.The coal dust gathered is filtered and precipitation test can obtain, and 30 purpose metal screens 3 comparatively are applicable to doing the screen casing screen pack, by selecting rational filter screen density, can improve filter effect, extend the filter cycle of screen casing.
In addition, described nylon cushion net 2 can be 8 order nylon cushion nets.
According to an embodiment of the present utility model, the top of described screen assembly is connected with flat box cupling 6, and below is connected with screen casing plug 7.Screen casing plug 4 can be starting taper formula screen casing plug.
Described rubber screen casing 1 its size can be for example external diameter ∮ 70mm * internal diameter ∮ 54mm * long 2820mm.The external diameter of starting taper formula screen casing plug can be ∮ 89mm.The overall length of screen assembly for example can be 3000mm.
The effect of the present embodiment is as follows:
(1) pass through trying out of 1 year 28 mouthfuls of well, the filtration coal dust of the coal bed gas well block-proof type filter sieve tube assembly of the present embodiment is respond well, and the trial employment period stops up screen casing without a bite well because of coal dust or holddown causes stopping well or inspection pump.
(2) on market existing every filter sieve tube price 3000.00 yuan of left and right; 4500.00 yuan, pottery screen casing.
The coal bed gas well block-proof type filter sieve tube assembly of the present embodiment only needs 2800.00 yuan.
Once, the pump detection and workover expense is 25000.00 yuan to the every inspection pump of coal bed gas well, and by twice inspection pump calculating every year on average, it is 50000.00 yuan that every mouthful of well is saved the pump detection and workover expense in 1 year.
If coal bed gas well will recover gas production before after examining pump at every turn, need one month at least, three months at most, every month, the cost of production of every mouthful of well (contained the electricity charge, labour cost etc.) 20000.00 yuan of left and right
As can be seen from the above data, use the coal bed gas well array of the screen assembly of the present embodiment to adopt tubing string, every mouthful of well at least can save production cost more than 70000.00 yuan every year.
The foregoing is only several embodiment of the present utility model, 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 (5)
1. a coal bed gas well block-proof type filter sieve tube assembly, is characterized in that, described screen assembly comprises the rubber screen casing, and the outside of rubber screen casing is coated with nylon cushion net and metal screen successively, and the upper and lower end of rubber screen casing is connected with respectively upper and lower joint.
2. coal bed gas well block-proof type filter sieve tube assembly according to claim 1, is characterized in that, described metal screen is 30 order stainless steel filtering nets.
3. coal bed gas well block-proof type filter sieve tube assembly according to claim 1 and 2, is characterized in that, described nylon cushion net is 8 order nylon cushion nets.
4. coal bed gas well block-proof type filter sieve tube assembly according to claim 1 and 2, is characterized in that, the top of described screen assembly is connected with the flat box cupling, and below is connected with the screen casing plug.
5. coal bed gas well block-proof type filter sieve tube assembly according to claim 4, is characterized in that, described screen casing plug is starting taper formula screen casing plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568089 CN202954792U (en) | 2012-10-31 | 2012-10-31 | Anti-blocking filtering screen pipe assembly of coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568089 CN202954792U (en) | 2012-10-31 | 2012-10-31 | Anti-blocking filtering screen pipe assembly of coal-bed gas well |
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| Publication Number | Publication Date |
|---|---|
| CN202954792U true CN202954792U (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568089 Expired - Lifetime CN202954792U (en) | 2012-10-31 | 2012-10-31 | Anti-blocking filtering screen pipe assembly of coal-bed gas well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821483A (en) * | 2014-03-06 | 2014-05-28 | 贵州盘江煤层气开发利用有限责任公司 | Special anti-blocking type filter sieve tube for drainage of coal-bed gas well |
| CN111514675A (en) * | 2020-05-08 | 2020-08-11 | 张航 | Filtering structure for ventilation of coal mine |
-
2012
- 2012-10-31 CN CN 201220568089 patent/CN202954792U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821483A (en) * | 2014-03-06 | 2014-05-28 | 贵州盘江煤层气开发利用有限责任公司 | Special anti-blocking type filter sieve tube for drainage of coal-bed gas well |
| CN103821483B (en) * | 2014-03-06 | 2016-04-27 | 贵州盘江煤层气开发利用有限责任公司 | The special block-proof type filter sieve tube of a kind of coal bed gas well mining |
| CN111514675A (en) * | 2020-05-08 | 2020-08-11 | 张航 | Filtering structure for ventilation of coal mine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130529 |
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| CX01 | Expiry of patent term |