CN101881149A - Heat injection drilling and sealing method of heating coalbed - Google Patents
Heat injection drilling and sealing method of heating coalbed Download PDFInfo
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- CN101881149A CN101881149A CN201010203706XA CN201010203706A CN101881149A CN 101881149 A CN101881149 A CN 101881149A CN 201010203706X A CN201010203706X A CN 201010203706XA CN 201010203706 A CN201010203706 A CN 201010203706A CN 101881149 A CN101881149 A CN 101881149A
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Abstract
The invention discloses a heat injection drilling and sealing method of a heating coalbed, and relates to the hole sealing of underground heat injection coalbed methane exploitation. The invention solves the problems that the prior art does not have the heat insulation function, and a hole sealing pipe is not easy to be dismantled and recycled. The invention has the following steps that: 1, a flange is arranged at one end of a top metal pipe, the other end thereof is provided with external threads, and internal threads which are matched with the top metal pipe are arranged on a top plastic pipe; 2, the top metal pipe is screwed into the top plastic pipe; 3, a second metal pipe is connected with the top metal pipe, and the second metal pipe is inserted into the top metal pipe; 4, a double-layered pipe is inserted into a drilling hole, the third step is repeated, the metal pipe is connected with the plastic pipe until reaching the designed depth; 5, a baffle is installed between a tail-end metal pipe and a tail-end plastic pipe, thermal insulation material is filled between the flange and the baffle; and 6, the well-installed double-layered pipe is fully inserted into the drilling hole, cement paste is injected between the plastic pipe and the drilling hole, so the hole sealing is completed. The invention is applicable to the hole sealing of underground horizontal drilling.
Description
Technical field
The present invention relates to be used for the method for sealing that mine coal seam is holed by a kind of heat injection of injecting superheated water or high-temperature vapour heating coal seam.
Background technology
Patent application 200910073743.0 (method of aboveground and underground combined heat injection coal bed gas extraction) and patent application 200810079794.X (method of pumping coalbed gas by heating coal bed) have proposed by injecting high-temperature steam or overheated steam to the coal seam, the method for heating coal seam enhanced recovery coal bed gas.Above-mentioned two patent applications have only proposed to adopt double-deck annulus line to carry out sealing of hole to heat injection boring, and do not provide the concrete structure of double-deck annulus line and concrete method for sealing.Mine coal seam boring at present only uses the metal tube of mono-layer tube or plastic pipe to carry out sealing of hole, does not have heat insulation function, can not be used to carry high temperature fluid.Simultaneously, in order to carry high-pressure fluid, when using the boring of metal tube envelope,, influence mechanical coal mining because hole sealing tube is difficult for being removed and reclaiming.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of heat injection drilling and sealing method that heats the coal seam is provided, solve prior art and adopt the mono-layer tube method for sealing not have heat insulating function, can not be used to carry high temperature fluid, and hole sealing tube is difficult for the problem that is removed and reclaims.
The present invention is achieved through the following technical solutions:
A kind of heat injection drilling and sealing method that heats the coal seam, it is characterized in that: the concrete steps of described method for sealing are as follows:
1) flange is set, other end threading at a end than the top metal tube of top plastics pipe range 1000mm; The internal thread that processing cooperates with top metal tube external screw thread in the top of heavy wall plastics pore.
2) the top metal tube is screwed in the top plastic pipe, form two-layer pipe.
3) utilize flange that second metal tube closely is connected with the top metal tube, the resistant to elevated temperatures sealing mat of lining is installed in second plastic pipe outside the metal tube then, and is inserted in the top plastic pipe between the flange, and two plastic pipe plug-in mounting places stick with glue knot.
4) bimetallic tube is stretched in the boring, outside the aperture, repeated for the 3rd step, connect metal tube and plastic pipe, till reaching projected depth.
5) baffle plate is installed endways between metal tube and the terminal plastic pipe, with the heat-barrier material filling of the space between flange and the baffle plate.
6) mounted bimetallic tube is all stretched in the boring, adopt known grouting behind shaft or drift lining method between plastic pipe and boring, to inject cement paste, finish sealing of hole.
A kind of employed double-deck hole sealing tube of heat injection drilling and sealing method that heats the coal seam, it is characterized in that: a kind of double thermal insulation pipe that described double-deck hole sealing tube is made up of the metal tube of the plastic pipe of plurality of outer-layer and some internal layers, adopt flange to connect between the adjacent metal pipe of internal layer, adopt the plug-in mounting mode to connect between the outer field adjacent plastic pipe, the length of top plastic pipe is shorter than the length of top metal tube, the length of terminal plastic pipe is shorter than the length of terminal metal tube, remaining plastic pipe and metal tube are isometric, the internal diameter of plastic pipe is slightly larger than the external diameter of metal tube flange, be threaded between top plastic pipe and the top metal tube, a baffle plate, the heat-barrier material filling of the space between flange and the baffle plate are installed between terminal plastic pipe and the terminal metal tube.
The present invention compared with prior art not only can successfully be transferred to the appointed area, and after being used to complete, metal tube can also reclaim with the fluid of HTHP and isolation on every side, can not influence the normal mechanical coal mining simultaneously.The present invention is applicable to the sealing of hole of down-hole horizontal boring.
Description of drawings
Fig. 1 is a kind of schematic diagram that heats the heat injection drilling and sealing method in coal seam.
The invention will be further described by embodiment below in conjunction with accompanying drawing.
The specific embodiment
As shown in Figure 1,
A kind of method for sealing that heats coal seam heat injection boring, its concrete steps are as follows:
1) after the coal bed drilling moulding, be that 58mm, external diameter are that 78mm, length are that the top plastic pipe 5-1 of 3m extend in the coal bed drilling 7 that internal diameter is 110mm with internal diameter, plastic pipe 5-1 termination, top internal diameter is 28mm, and processing is about the internal thread of 200mm.
2) be that 22mm, external diameter are that 28mm, length are the external screw threads that metal tube 4-1 end, the top processing of 4m is about 200mm with internal diameter, and extend among the top plastic pipe 5-1, be connected with the internal thread of top plastic pipe 5-1, make metal tube give prominence to plastic pipe 1m like this, the flange after being convenient to connects and installs.
3) be connected with the flange 3 of the 52mm external diameter metal tube 4 that top metal tube 4-1 and another root specification 4m of the same race is long.
4) be a bit larger tham another root plastic pipe of top plastic pipe 5-1 external diameter with external diameter and top plastic pipe 5-1 pegs graft, the about 20mm of grafting length, the ledge of grafting and 7 gaps of leaving 6mm of holing.
5) use the same method and successively metal tube 4 is connected with plastic pipe 5, use 25 separately, connecting total length is 200m.
6) baffle plate 1 is installed endways between metal tube 4-2 and the terminal plastic pipe 5-2, with heat-barrier material 2 fillings of the space between flange 3 and the baffle plate 1.
7) method that adopts slip casting is with plastic pipe and the filling of boring inwall, and the slip casting zone is the join domain of whole tubing, and the boring scope of slip casting process assurance 200m is all used the slurries filling.
After heat injection is finished, take out the charges between flange 3 and the baffle plate 1, rotating metallic pipe 4 unclamps top metal tube 4-1 and to be threaded from top plastic pipe 5-1, extract metal tube, takes the flange connection successively apart, takes out all metal tubes, finishes the recovery of metal tube.
A kind of employed double-deck hole sealing tube of heat injection drilling and sealing method that heats the coal seam, a kind of double thermal insulation pipe of forming by the metal tube 4 of the plastic pipe 5 of plurality of outer-layer and some internal layers, adopt flange 3 to connect between the adjacent metal pipe 4 of internal layer, adopt the plug-in mounting mode to connect between the outer field adjacent plastic pipe 5, the length of top plastic pipe 5-1 is shorter than the length of top metal tube 4-1, the length of terminal plastic pipe 5-2 is shorter than the length of terminal metal tube 4-2, remaining plastic pipe and metal tube are isometric, the internal diameter of plastic pipe is slightly larger than the external diameter of metal tube flange 3, be threaded between top plastic pipe 5-1 and the top metal tube 4-1, a baffle plate 1 is installed, heat-barrier material 2 fillings of the space between flange 3 and the baffle plate 1 between terminal plastic pipe 5-2 and the terminal metal tube 4-2.
Claims (2)
1. heat injection drilling and sealing method that heats the coal seam, it is characterized in that: the concrete steps of described method for sealing are as follows:
1) at a end flange (3), other end threading are set than the top metal tube (4-1) of the long 1000mm of top plastic pipe (5-1); The internal thread that processing cooperates with top metal tube (4-1) external screw thread in hole, the top of heavy wall plastic pipe (5-1).
2) top metal tube (4-1) is screwed in the top plastic pipe (5-1), form two-layer pipe.
3) utilize flange (3) that second metal tube (4) closely is connected with top metal tube (4-1), the resistant to elevated temperatures sealing mat of lining between the flange (3), then second plastic pipe (5) is installed in outside the metal tube (4), and be inserted in the top plastic pipe (5-1), two plastic pipe plug-in mounting places stick with glue knot.
4) bimetallic tube is stretched in the boring (7), outside the aperture, repeated for the 3rd step, connect metal tube (4) and plastic pipe (5), till reaching projected depth.
5) between metal tube (4-2) and the terminal plastic pipe (5-2) baffle plate (1) is installed endways, with heat-barrier material (2) filling of the space between flange (3) and the baffle plate (1).
6) mounted bimetallic tube is all stretched in the boring (7), adopt known grouting behind shaft or drift lining method between plastic pipe (5) and boring (7), to inject cement paste (6), finish sealing of hole.
2. according to the employed double-deck hole sealing tube of the described method for sealing of claim 1, it is characterized in that: a kind of double thermal insulation pipe that described double-deck hole sealing tube is made up of the metal tube (4) of the plastic pipe (5) of plurality of outer-layer and some internal layers, adopt flange (3) to connect between the adjacent metal pipe (4) of internal layer, adopt the plug-in mounting mode to connect between the outer field adjacent plastic pipe (5), the length of top plastic pipe (5-1) is shorter than the length of top metal tube (4-1), the length of terminal plastic pipe (5-2) is shorter than the length of terminal metal tube (4-2), remaining plastic pipe (5) is isometric with metal tube (4), the internal diameter of plastic pipe (4) is slightly larger than the external diameter of flange (3), be threaded between top plastic pipe (5-1) and the top metal tube (4-1), between terminal plastic pipe (5-2) and the terminal metal tube (4-2) baffle plate (1) is installed, is used heat-barrier material (2) filling between flange (3) and the baffle plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010203706XA CN101881149B (en) | 2010-06-17 | 2010-06-17 | Heat injection drilling and sealing method of heating coalbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010203706XA CN101881149B (en) | 2010-06-17 | 2010-06-17 | Heat injection drilling and sealing method of heating coalbed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101881149A true CN101881149A (en) | 2010-11-10 |
| CN101881149B CN101881149B (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010203706XA Expired - Fee Related CN101881149B (en) | 2010-06-17 | 2010-06-17 | Heat injection drilling and sealing method of heating coalbed |
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| Country | Link |
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| CN (1) | CN101881149B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612640A (en) * | 2015-01-12 | 2015-05-13 | 中国矿业大学 | Underground coal mine drilling, heat injection and hole sealing integration method |
| CN108915648A (en) * | 2018-06-29 | 2018-11-30 | 徐州工程学院 | A kind of encapsulating method suitable for high temperature nitrogen injection coal bed drilling |
| CN110219636A (en) * | 2019-06-19 | 2019-09-10 | 山东科技大学 | A kind of coal underground gasifying furnace note exhaust drilled tunnel heat insulating and sealing method for blocking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378050A (en) * | 1981-01-28 | 1983-03-29 | Tatevosian Ruben A | Arrangement for full hole drilling |
| US20030173081A1 (en) * | 2001-10-24 | 2003-09-18 | Vinegar Harold J. | In situ thermal processing of an oil reservoir formation |
| CN201173109Y (en) * | 2008-03-31 | 2008-12-31 | 尚广玉 | Heat insulation compensation apparatus for thick oil steam injection exploitation |
| CN201202491Y (en) * | 2008-06-03 | 2009-03-04 | 铁岭兵山煤业设备仪器制造有限公司 | Pressure expanding seal hole gas extractor |
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
-
2010
- 2010-06-17 CN CN201010203706XA patent/CN101881149B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378050A (en) * | 1981-01-28 | 1983-03-29 | Tatevosian Ruben A | Arrangement for full hole drilling |
| US20030173081A1 (en) * | 2001-10-24 | 2003-09-18 | Vinegar Harold J. | In situ thermal processing of an oil reservoir formation |
| CN201173109Y (en) * | 2008-03-31 | 2008-12-31 | 尚广玉 | Heat insulation compensation apparatus for thick oil steam injection exploitation |
| CN201202491Y (en) * | 2008-06-03 | 2009-03-04 | 铁岭兵山煤业设备仪器制造有限公司 | Pressure expanding seal hole gas extractor |
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612640A (en) * | 2015-01-12 | 2015-05-13 | 中国矿业大学 | Underground coal mine drilling, heat injection and hole sealing integration method |
| CN104612640B (en) * | 2015-01-12 | 2017-08-29 | 中国矿业大学 | A kind of coal mine down-hole drilling heat injection and sealing of hole integral method |
| CN108915648A (en) * | 2018-06-29 | 2018-11-30 | 徐州工程学院 | A kind of encapsulating method suitable for high temperature nitrogen injection coal bed drilling |
| CN108915648B (en) * | 2018-06-29 | 2020-10-13 | 徐州工程学院 | Sealing method suitable for high-temperature nitrogen injection coal seam drilling |
| CN110219636A (en) * | 2019-06-19 | 2019-09-10 | 山东科技大学 | A kind of coal underground gasifying furnace note exhaust drilled tunnel heat insulating and sealing method for blocking |
| CN110219636B (en) * | 2019-06-19 | 2021-04-02 | 山东科技大学 | Heat-insulation closed plugging method for injection and exhaust drilling channel of underground coal gasification furnace |
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| Publication number | Publication date |
|---|---|
| CN101881149B (en) | 2012-11-21 |
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Granted publication date: 20121121 Termination date: 20130617 |