CN106761544B - A kind of coal mine gas drainage drilling fluids encapsulating method - Google Patents
A kind of coal mine gas drainage drilling fluids encapsulating method Download PDFInfo
- Publication number
- CN106761544B CN106761544B CN201611243361.4A CN201611243361A CN106761544B CN 106761544 B CN106761544 B CN 106761544B CN 201611243361 A CN201611243361 A CN 201611243361A CN 106761544 B CN106761544 B CN 106761544B
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- China
- Prior art keywords
- water injection
- injection pipe
- water
- sealing
- pressure
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Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The invention discloses a kind of coal mine gas drainage drilling fluids encapsulating methods, water injection pipe is installed in drainage tube, water injection pipe is equipped with the branch pipe closed across drainage tube and is equipped with check valve, one plug is installed respectively in extraction pipe surface and positioned at the two sides of check valve, water injection pipe is equipped with pressure gauge and main valve, and lumen loading has sealing fluid；Drainage tube is put into drilling, valve opening water filling closes main valve after pressure rises to certain pressure；Water injection pipe connects low pressure water source, persistently carries out the slow infiltration sealing of water flow to drilling, observes gas extraction concentration data daily.Method of the invention be based on " solid adhesive body, colloid sealing liquid body, liquid seal gas ", using can be cementing viscous fluid and water as sealing material replace conventional solid, effectively increase the compactness of sealing section, achieve the purpose that raising sealing of hole effect.
Description
Technical field
The present invention relates to coal mines to acquire field, relates in particular to a kind of coal mine gas drainage drilling fluids sealing side
Method.
Background technique
With the increase of coal mining depth, the gas problem of coal mine is also got worse.Especially high methane low-permeable
The gas control problem in coal seam, seriously restricts always the safety in production of coal mine.Currently, solving the gas during pit mining
Gush out with the most important means of outstanding problem, be exactly using gas drainage.However, during gas drainage, there is also
The various problems such as extraction concentration is low, effect is poor, the duration is short.One of those most important restraining factors be exactly drill it is close
Envelope ability directly restricts the extracting result of drilling.In order to improve the extracting result of drilling, extend drilling uses time, mesh
Using at most, effect the best way is exactly the method for sealing of " a two stifled notes " in preceding China, is usually perfused between two plugs
Be cement mortar.Although there is cement mortar some strength to bore since cement has the tendency that contraction after solidification
Crack will be generated at hole wall leads to gas leakage, drills particularly with small inclination, and the contraction of cement is inevitable to be generated greatly in drilling upper wall
Crack.In addition to this, mine can generally also use polyurethane sealing of hole, but due to polyurethane self property, sealing of hole for a period of time after,
It will lead to its deformation under the action of pressure on ground, and then lose the close contact in coal wall, gas leakage occurs, makes borehole failure.Return
It receives after summary, it can be seen that existing borehole sealing belongs to sealed solid, can not effectively seal the drilling certain normal direction ruler of wall surface
The hole crack of degree, the defect of various degrees, this makes to improve hole sealing technology principle and method seems very necessary.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of coal mine gas pumpings for realizing the drilling long-term extraction of high concentration gas
Borehole Fluid Sealing method.
Technical solution: in order to achieve the above-mentioned object of the invention, a kind of coal mine gas drainage of the invention is sealed with drilling fluids
Method includes the following steps:
(1) water injection pipe is installed in drainage tube, in the aperture of extraction tube wall and the branch pipe being connected to water injection pipe is installed, it is described
The tube wall of branch pipe and water injection pipe and drainage tube is tightly connected, and the branch tube end installs check valve；
(2) two plugs are installed in extraction pipe surface, described two plugs are respectively arranged in the two sides of branch pipe；Water injection pipe
Water injection end is equipped with pressure gauge and main valve；The main valve, water injection pipe, lumen loading any one or more in branch pipe have sealing
Fluid；
(3) drainage tube is put into drilling, opens main valve, note sealing fluid and water into drilling；
(4) after pressure gauge shows that the pressure in water injection pipe is raised slowly to label pressure, main valve is closed；
(5) water injection pipe connection is not higher than the low pressure water source of label pressure, and persistently to drilling, progress water flow is slow to seep sealing, daily
Observe gas extraction concentration data.
Further, the plug is boring hole packer or polyurethane, cement mortar filler.It selects and drills when plug
When with hole packer, the hole packer is conventionally known hole packer, and a hole packer can be selected when use, can also select multiple
Hole packer is applied in combination；When plug selects polyurethane, the polyurethane has centainly elastically-deformable gather to be conventionally known
Urethane material.
It is advanced optimized as of the invention, the main valve is ball valve.
Further, the sealing fluid includes the third solidifying, polyurethane, sodium carboxymethylcellulose, water-soluble pollopas
Any one.Sealing fluid is aqueous colloidal substance, is used to the material instead of conventional seals leak stopping, significantly improves leak stopping
Effect.
Label pressure of the present invention changes according to the difference that drilling size, leak stopping require, for majority of case
For, label pressure is usually no more than 1MPa, and in general in 0.5~0.8MPa, the cracking pressure of check valve must not be higher than mark
Pressure is remembered, generally in 0.2~0.4MPa.
The present invention be on the basis of the drilling and sealing methods such as the common cement of coal mine, polyurethane, " two stifled a note ", with
" solid adhesive body, colloid sealing liquid body, liquid seal gas " is dominant ideas, using can be cementing viscous fluid and water as sealing of hole
Material replaces conventional solid, achievees the purpose that improve sealing of hole effect.Compared to traditional sealed solid, fluid has solid not comparable
Quasi- property, under the action of high pressure, it is easier to enter minute fissure, block tiny leakage path.Meanwhile in drilling,
Cementing fluid plays the role of certain resilient support to the wall of a borehole, effectively increases the compactness of sealing section, reduces and continues
Act on the seepage discharge of static pressure water.Moreover, adjusting the pressure of static pressure water in time by investigating gas extraction concentration, it is close to reach dynamic
The effect of envelope.In conclusion the method is simple and easy, and it is easy to operate, gas pumping effect is effectively raised, is had extensive
Practicability.
Specific embodiment
Invention is further explained below.
A kind of coal mine gas drainage drilling fluids encapsulating method, includes the following steps:
(1) water injection pipe is installed in drainage tube, in the aperture of extraction tube wall and the branch pipe being connected to water injection pipe, branch pipe are installed
It is tightly connected with the tube wall of water injection pipe and drainage tube, branch tube end installs check valve, and the cracking pressure of check valve is 0.3MPa；
(2) two plugs are installed in extraction pipe surface, two plugs are respectively arranged in the two sides of branch pipe, and plug is boring
The fillers such as hole packer or polyurethane, cement mortar；The water injection end of water injection pipe is equipped with pressure gauge and ball valve；Ball valve, water injection pipe,
Any one or more lumen loadings has sealing fluid in branch pipe, and sealing fluid includes the third solidifying, polyurethane, carboxymethyl cellulose
Any one of sodium, water-soluble pollopas.Sealing fluid is aqueous colloidal substance, is used to instead of conventional seals leak stopping
Material significantly improves plugging effect；
(3) drainage tube is put into drilling, opens ball valve, note sealing fluid and water into drilling；
(4) when pressure gauge shows that the pressure in water injection pipe is raised slowly to 0.6MPa, ball valve is closed；
(5) water injection pipe connection is not higher than the low pressure water source of 0.6MPa, persistently slow to drilling progress water flow to seep sealing, sight daily
Gas extraction concentration data are examined, are expired until mash gas pumping drilling is on active service.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of coal mine gas drainage drilling fluids encapsulating method, it is characterised in that include the following steps:
(1) water injection pipe is installed in drainage tube, in the aperture of extraction tube wall and the branch pipe being connected to water injection pipe, the branch pipe are installed
It is tightly connected with the tube wall of water injection pipe and drainage tube, the branch tube end installs check valve；
(2) two plugs are installed in extraction pipe surface, described two plugs are respectively arranged in the two sides of branch pipe；The water filling of water injection pipe
End is equipped with pressure gauge and main valve；The main valve, water injection pipe, lumen loading any one or more in branch pipe have sealing to flow
Body；
(3) drainage tube is put into drilling, opens main valve, note sealing fluid and water into drilling；
(4) after pressure gauge shows that the pressure in water injection pipe is raised slowly to label pressure, main valve is closed；The unlatching pressure of check valve
Power must not be higher than label pressure；
(5) low pressure water source of the water injection pipe connection not higher than label pressure, persistently slow to drilling progress water flow to seep sealing, observation daily
Gas extraction concentration data.
2. according to the method described in claim 1, it is characterized by: the plug is boring hole packer or polyurethane, cement
Mortar filler.
3. according to the method described in claim 1, it is characterized by: the main valve is ball valve.
4. according to the method described in claim 1, it is characterized by: the sealing fluid includes the third solidifying, polyurethane, carboxymethyl fibre
Tie up any one of plain sodium, water-soluble pollopas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243361.4A CN106761544B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gas drainage drilling fluids encapsulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243361.4A CN106761544B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gas drainage drilling fluids encapsulating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761544A CN106761544A (en) | 2017-05-31 |
| CN106761544B true CN106761544B (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611243361.4A Active CN106761544B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gas drainage drilling fluids encapsulating method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108868871B (en) * | 2018-05-18 | 2024-03-29 | 河南能源化工集团研究总院有限公司 | Method for quickly balancing stress after hydraulic punching |
| CN109370515B (en) * | 2018-10-24 | 2020-05-29 | 中国矿业大学 | Mucus type hole sealing agent with internal doped scale particles and preparation and use method thereof |
| CN110617102A (en) * | 2019-10-08 | 2019-12-27 | 刘云山 | Method for quickly releasing gas in coal mine underground high-pressure water injection fracturing coal seam |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5161613A (en) * | 1991-08-16 | 1992-11-10 | Mobil Oil Corporation | Apparatus for treating formations using alternate flowpaths |
| US5833001A (en) * | 1996-12-13 | 1998-11-10 | Schlumberger Technology Corporation | Sealing well casings |
| CN101886531A (en) * | 2010-06-14 | 2010-11-17 | 阳泉煤业（集团）有限责任公司 | Drilling and sealing method for gas drainage from coal seam |
| CN102900396B (en) * | 2012-11-01 | 2014-12-10 | 中国矿业大学 | Method for integrally sealing and separating gas extraction drilled hole in coal seam |
| CN102996159B (en) * | 2012-12-03 | 2015-04-29 | 中国矿业大学 | Multiphase medium plugging device and method for gas extraction drill hole |
| CN103075128B (en) * | 2012-12-31 | 2015-07-29 | 中国矿业大学 | A kind of method for sealing of mash gas pumping drilling |
| CN103174428B (en) * | 2013-03-15 | 2015-10-28 | 金川集团股份有限公司 | A kind of applied chemistry slurries implement the method for grouting for water blocking to vertical shaft |
| CN203430472U (en) * | 2013-07-23 | 2014-02-12 | 蔡长辉 | Hole sealing device for rapidly sealing drill holes |
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