CN207194872U - One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas - Google Patents
One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas Download PDFInfo
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- CN207194872U CN207194872U CN201720939398.4U CN201720939398U CN207194872U CN 207194872 U CN207194872 U CN 207194872U CN 201720939398 U CN201720939398 U CN 201720939398U CN 207194872 U CN207194872 U CN 207194872U
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- dredging
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Abstract
The utility model belongs to coalbed gas in coal mine area and adopts well technical field, is specifically that one kind adopts well construction using high-pressure fluid dredging L-type coal bed gas.In order to improve the problem of coal bed gas adopts well extraction ability, well is adopted including L-type, L-type is adopted and is provided with screen casing inside well, pressure gauge is set at the well head of screen casing, screen casing is connected by high pressure tubing string with compressor, compressor is connected with fluid reservoir, and the outside that L-type adopts well horizontal segment is provided with sleeve pipe, and sleeve pipe connects through minery with goaf.The utility model has the advantages of effect is similar, cost is relatively low, safe and reliable.
Description
Technical field
The utility model belongs to coalbed gas in coal mine area and adopts well technical field, is specifically that one kind utilizes high-pressure fluid dredging L
Type coal bed gas adopts well construction.
Background technology
Coal bed gas is adopted well and put into operation after a period of time, and with the digging in colliery, stratum has different degrees of sedimentation, coal seam
Crack can be blocked by coal dust or other impurity, hinder coal bed gas parsing and migration, coal bed gas is adopted well capacity reduction.In addition,
Stratum water penetration is into cracks in coal seam, it is impossible to discharge in time, can also block coal bed gas and adopt well.Well production is adopted in reduction, it is impossible to
The gas of effective extraction working face, the colliery digging to the colliery later stage bring very big potential safety hazard.In order to be preferably colliery
Service, improve coal bed gas and adopt well extraction ability, need to try every possible means the cracks in coal seam dredging of blocking.Coal adopts country altogether with coal bed gas
Key lab develops correlation technique.
The content of the invention
The utility model is in order to improve the problem of coal bed gas adopts well extraction ability, there is provided one kind is dredged using high-pressure fluid
L-type coal bed gas adopts well construction.
The utility model takes following technical scheme：One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas, wraps
Include L-type and adopt well, L-type is adopted and screen casing is provided with inside well, and pressure gauge is set at the well head of screen casing, and screen casing passes through high pressure tubing string and pressure
Contracting machine is connected, and compressor is connected with fluid reservoir, and the outside that L-type adopts well horizontal segment is provided with sleeve pipe, and sleeve pipe passes through minery
Connected with goaf.
The length that described L-type adopts well horizontal segment is less than or equal to 1000m.
Deposited in fluid reservoir for clear water.Dredged with clear water, with the digging in colliery, stratum has different degrees of
Sedimentation, cracks in coal seam can be blocked by coal dust or other impurity.Clear water is pressed into by coal bed gas well using high pressure pump truck, by the coal of blocking
Slabbing gap is dredged again, and then coal bed gas is adopted well and resumed production ability.
Deposited in fluid reservoir for nitrogen.Dredged with nitrogen, when stratum water penetration is into cracks in coal seam, position is relatively low
Place be easy to ponding, ponding row does not go out, and will block cracks in coal seam, the coal bed gas that working face loss comes can not pass through
Discharge in crack.At this time, it may be necessary to after nitrogen is compressed with compressor, enter pit shaft through high pressure tubing string, the ponding at low-lying place dispelled,
Again cracks in coal seam is dredged, coal bed gas is adopted well and resumes production.
Compared with prior art, the utility model has the advantages that：The high-pressure fluid of use can be according to actual stifled
Reason is filled in, reasonably selects the fluid media (medium)s such as water, nitrogen, improves dredging effect.The utility model needs well Joint Implementation up and down, leads to
Borehole observation high-pressure fluid direction of advance is crossed, can tentatively judge to dredge effect, and at down-hole coal excavation face roof can pass through
It is artificial to manufacture the effect for press, reaching and reducing L-type well horizontal segment crustal stress, improve dredging chance of success.The utility model and coal
Layer fracturing technique is compared, and has the advantages of effect is similar, cost is relatively low, safe and reliable.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
1- mineries in figure, 2- goafs, 3- sleeve pipes, 4- coal seams, 5- screen casings, 6- fluid reservoirs, 7- compressors, 8- are high
Pressure pipe post.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 1, a kind of adopt well construction using high-pressure fluid dredging L-type coal bed gas, including L-type adopts well 9, L-type
To adopt the inside of well 9 and be provided with screen casing 5, pressure gauge is set at the well head of screen casing 5, screen casing 5 is connected by high pressure tubing string 8 with compressor 7,
Compressor 7 is connected with fluid reservoir 6, and the outside that L-type adopts the horizontal segment of well 9 is provided with sleeve pipe 3, and sleeve pipe 3 is through minery 1 with adopting
Dead zone 2 connects.
The length that described L-type adopts the horizontal segment of well 9 is less than or equal to 1000m.
Scheme one, deposit in fluid reservoir 6 for clear water.
Scheme two, deposit in fluid reservoir 6 for nitrogen.
Concrete operation step is as follows：
1. opening adopts well well head, connection high pressure tubing string 8 adopts screen casing 5 in the well head of well 9, the well head of screen casing 5 with L-type
The pressure gauge that place's installation range is 0-3.2MPa.
2. for fluid reservoir 6 by compressor 7, the adjustment rotating speed of compressor 7 is 1800r/min, makes outlet pressure stability extremely
More than 17Bar, rate of flow of fluid 30m3/min.The horizontal segment residual length 0-1000m of well 9 is adopted according to L-type, it is determined that when tentatively dredging
Between 20-40min.
3. observing well head pressure change during preliminary dredging, pressure is higher before dredging, and pressure gradually decreases down 0Bar after dredging.
If pressure does not decline during preliminary dredging, the rotating speed of compressor 7 is improved to 1900r/min, improves outlet pressure, rate of flow of fluid
35m3/ more than min, dredging time 20min or so.
4. dredging should change high-power compressor when ineffective, or wait weight after underground coal mine coal-face roof weighting
Newly carry out dredging operation.
5. should carry out adopting the work of well extraction equipment test-run a machine immediately after dredging, avoid cracks in coal seam again by coal dust or other
Impurity blocks.
Although the utility model is described in detail with reference to the foregoing embodiments, come for those skilled in the art
Say, it can still be modified to the technical scheme described in foregoing embodiments, or which part technical characteristic is entered
Row equivalent substitution, all within the spirit and principles of the utility model, any modification, equivalent substitution and improvements made etc., all should
Within the scope of protection of the utility model.
Claims (4)
1. one kind adopts well construction using high-pressure fluid dredging L-type coal bed gas, it is characterised in that：Well is adopted including L-type（9）, L-type
Adopt well（9）Inside is provided with screen casing（5）, screen casing（5）Well head at set pressure gauge, screen casing（5）Pass through high pressure tubing string（8）With pressure
Contracting machine（7）Connection, compressor（7）With fluid reservoir（6）Connection, L-type adopt well（9）The outside of horizontal segment is provided with sleeve pipe（3）,
Sleeve pipe（3）Through minery（1）With goaf（2）Connection.
2. according to claim 1 adopt well construction using high-pressure fluid dredging L-type coal bed gas, it is characterised in that：It is described
L-type adopt well（9）The length of horizontal segment is less than or equal to 1000m.
3. according to claim 2 adopt well construction using high-pressure fluid dredging L-type coal bed gas, it is characterised in that：Fluid
Holding vessel（6）Middle storage for clear water.
4. according to claim 2 adopt well construction using high-pressure fluid dredging L-type coal bed gas, it is characterised in that：Fluid
Holding vessel（6）Middle storage for nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720939398.4U CN207194872U (en) | 2017-07-31 | 2017-07-31 | One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720939398.4U CN207194872U (en) | 2017-07-31 | 2017-07-31 | One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207194872U true CN207194872U (en) | 2018-04-06 |
Family
ID=61799569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720939398.4U Active CN207194872U (en) | 2017-07-31 | 2017-07-31 | One kind adopts well construction using high-pressure fluid dredging L-type coal bed gas |
Country Status (1)
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| CN (1) | CN207194872U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441533A (en) * | 2018-10-25 | 2019-03-08 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of underground solves to adopt the stifled method of L-type well water |
| CN111022109A (en) * | 2019-12-24 | 2020-04-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for extracting gas in closed goaf |
| CN111236874A (en) * | 2020-03-31 | 2020-06-05 | 应急管理部信息研究院 | Method for cutting ground coal bed gas well casing pipe underground |
-
2017
- 2017-07-31 CN CN201720939398.4U patent/CN207194872U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441533A (en) * | 2018-10-25 | 2019-03-08 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of underground solves to adopt the stifled method of L-type well water |
| CN111022109A (en) * | 2019-12-24 | 2020-04-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for extracting gas in closed goaf |
| CN111236874A (en) * | 2020-03-31 | 2020-06-05 | 应急管理部信息研究院 | Method for cutting ground coal bed gas well casing pipe underground |
| CN111236874B (en) * | 2020-03-31 | 2022-07-22 | 应急管理部信息研究院 | Method for cutting ground coal bed gas well casing pipe underground |
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