CN103015946A - Hole-drilling and hole-sealing method for gas extraction - Google Patents
Hole-drilling and hole-sealing method for gas extraction Download PDFInfo
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- CN103015946A CN103015946A CN2012105733300A CN201210573330A CN103015946A CN 103015946 A CN103015946 A CN 103015946A CN 2012105733300 A CN2012105733300 A CN 2012105733300A CN 201210573330 A CN201210573330 A CN 201210573330A CN 103015946 A CN103015946 A CN 103015946A
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Abstract
The invention discloses a hole-drilling and hole-sealing method for gas extraction. The hole-drilling and hole-sealing method comprises the following steps of: (1) binding hole-sealing bags on a gas extraction pipe at intervals, and enabling an injection pipe to pass through the hole-sealing bags, wherein a discharge hole of the injection pipe is positioned among the hole-sealing bags; (2) opening a partition device in each hole-sealing bag to enable two components of a foam material I in the hole-sealing bag to converge together, and then conveying the hole-sealing bags and the gas extraction pipe into a gas extraction drill hole together; and (3) after the foam material I in the hole-sealing bags is subjected to foam forming and curing, forming a sealing section between the hole-sealing bags, injecting a double-component mixed solution of a uniformly-mixed foam material II to the sealing section by the injection pipe, and finishing the hole-sealing operation after the foam material II is subjected to foam forming and curing. According to the invention, the hole-sealing bags with low cost play a role of baffle plates, so that the cost of manufacturing a hole-sealing baffle plate is saved; and the hole-drilling and hole-sealing method is simpler and more convenient to operate, thereby being more economic and practical and having wide application prospect.
Description
Technical field
The present invention relates to mash gas pumping drilling hole sealing technology field, relate in particular to a kind of mash gas pumping drilling method for sealing.
Background technology
Coal extraction gas is a kind of energy resources of high-quality, and according to statistics, China's coal-mine district mash gas extraction total amount in 2010 is 7,500,000,000 m nearly
3, but directly utilize the mash gas extraction total amount that 2,300,000,000 m are only arranged
3, utilization rate only is about 31%, a large amount of mash gas extractions are directly discharged, and have both caused the wasting of resources, also atmospheric environment are polluted (the gas main component is methane, and its greenhouse effect are 21 times of carbon dioxide).Causing a large amount of gas resources is that the coal extraction gas density is low by one of directly emptying major reason, utilizes cost high.And cause the low main cause of a large amount of coal extraction gas densities to be extraction borehole sealing of hole weak effect, there is gas leakage.Increase along with China's energy demand growing tension and energy-saving and emission-reduction pressure, the coal extraction gas utilization will become the effective means of effective this situation of alleviation, according to China's coal bed gas (coal mine gas) development and use " 12 " planning, 2015, national underground gas extraction amount reached 14,000,000,000 m
3Utilization rate reaches 60%, realize this goal, when increasing the mine gas extraction amount, also need improve gas extraction concentration, promote mash gas extraction and utilize quality, realize zero-emission, therefore, study from extraction borehole hole-sealing technology and method, it is significant to form efficient mash gas pumping drilling hole-sealing technology method.
Publication number is that the Chinese patent literature of CN102022093A discloses a kind of response type foam sealed hole system; This sealing of hole system comprises hole-sealing sealing device, hole-sealing sealing device comprises intrusion pipe and at least two sealing of hole baffle plates, the gas pumping pipe passes sealing of hole baffle plate plate face and is fixedly connected with it, between the sealing of hole baffle plate at two ends, form seal section, the intrusion pipe feeding mouth is communicated in the injection device nozzle, and seal section is connected with the intrusion pipe discharging opening; When using this sealing of hole system to carry out the sealing of hole operation, by intrusion pipe the response type foam AB component mixed liquor that mixes is injected in the seal section that forms between the sealing of hole baffle plate, then utilize the preshaped relative confined space of foaming and intumescing filling of response type foam self, reach sealing effectiveness.But the problem that this response type foam sealed hole system and method for sealing thereof exist is: the sealing of hole baffle plate high cost of its use, and complicated operation, and economical and practical not in the practical operation under coal mine.
Summary of the invention
In view of this, the invention provides a kind of mash gas pumping drilling method for sealing, this method for sealing sealing of hole is effective, can guarantee that extraction borehole is air tight, and cost is lower, operates easier.
Mash gas pumping drilling method for sealing of the present invention comprises the steps:
1) the hole sealing bag interval is bundled on the gas pumping pipe, simultaneously intrusion pipe is passed hole sealing bag, the discharging opening of intrusion pipe is between hole sealing bag; The bag of described hole sealing bag middle part is provided with separating device to be opened/closed, and separating device is divided into two parts of mutual isolation with bag, and corresponding two kinds of components that fill the expanded material I one by one in two parts bag;
2) separating device of hole sealing bag is opened, made that two kinds of components of expanded material I are flowed to together in the hole sealing bag, together send in the mash gas pumping drilling with being about to hole sealing bag and gas pumping pipe;
3) after the expanded material I foaming of hole sealing bag solidifies, form seal section between the hole sealing bag, inject in the seal sections by two component mixed liquors of intrusion pipe with the expanded material II that mixes, after expanded material II foaming solidifies, finish sealing of hole and operate.
Further, described expanded material I is the hole-opening foaming material.
Further, described separating device is the clips that is held on the bag external surface.
Beneficial effect of the present invention is: the present invention adopts hole sealing bag with low cost to substitute the sealing of hole baffle plate, expanded material I foaming in the hole sealing bag, and finally burst bag, fill up between gas pumping pipe and the mash gas pumping drilling hole wall, formation is similar to the structure of " baffle plate ", injecting frothing material II in the seal section that forms between " baffle plate " at last, the expanded material II extrusion packing that expands in seal section reaches sealing effectiveness.
The present invention utilizes hole sealing bag with low cost to play the effect of " baffle plate ", saved the cost of making the sealing of hole baffle plate, and operation is also easier, and is therefore practical more economically, has broad application prospects; Hole sealing depth of the present invention and length can be regulated arbitrarily according to actual needs, can satisfy under the coal mine along all kinds of mash gas pumping drilling sealing of holes such as coal bed drilling, layer-through drilling, goaf extraction boreholes.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is the schematic diagram of method for sealing phase I of the present invention;
Fig. 2 is the schematic diagram of method for sealing second stage of the present invention;
Fig. 3 is the structural representation of hole sealing bag.
The specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.
Mash gas pumping drilling method for sealing of the present invention comprises the steps:
1) hole sealing bag 1 interval is bundled on the gas pumping pipe 2, simultaneously intrusion pipe 3 is passed hole sealing bag 1, the discharging opening of intrusion pipe 3 is between hole sealing bag 1, as shown in Figure 1; The bag of described hole sealing bag 1 middle part is provided with separating device 11 to be opened/closed, and separating device 11 is divided into two parts of mutual isolation with bag, and corresponding two kinds of components that fill the expanded material I one by one in two parts bag, as shown in Figure 3;
2) separating device 11 of hole sealing bag 1 is opened, made that two kinds of components of expanded material I are flowed to together in the hole sealing bag 1, together send in the mash gas pumping drilling 4 with being about to hole sealing bag 1 and gas pumping pipe 2;
3) the expanded material I foaming of hole sealing bag 1 solidifies, as shown in Figure 2, the expanded material I of hole sealing bag 1 is finally burst bag, fill up between gas pumping pipe 2 and mash gas pumping drilling 4 hole walls, formation is similar to the structure of " baffle plate ", form seal section between the hole sealing bag 1, inject in the seal sections by two component mixed liquors of intrusion pipe 3 with the expanded material II that mixes, expanded material II foaming solidifies, extrusion packing expands in seal section, reach sealing effectiveness, finish the sealing of hole operation.
Among the present invention, described expanded material I is the hole-opening foaming material; Most pores are interconnected in the hole-opening foaming material, can see through air, therefore when the injecting frothing material II, the air in the seal section can be discharged by the pore of expanded material I, make the extrusion packing of expanded material II in seal section more closely knit, reach more excellent sealing effectiveness; Expanded material I and expanded material II can be various pairs of component chemical blowing materials, such as dual-component polyurethane expanded material etc.
Among the present invention, described separating device 11 is preferably the clips that is held on the bag external surface; Certainly, separating device also can be other form of structure to be opened/closed, is self hot pressing isolation strip at bag middle part such as: separating device, washes self hot pressing isolation strip open by the extruding bag during use.
The present invention utilizes hole sealing bag with low cost to play the effect of " baffle plate ", saved the cost of making the sealing of hole baffle plate, and operation is also easier, and is therefore practical more economically, has broad application prospects; Hole sealing depth of the present invention and length can be regulated arbitrarily according to actual needs, can satisfy under the coal mine along all kinds of mash gas pumping drilling sealing of holes such as coal bed drilling, layer-through drilling, goaf extraction boreholes.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by invention has been described with reference to the preferred embodiments of the present invention, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.
Claims (3)
1. a mash gas pumping drilling method for sealing is characterized in that: comprise the steps:
1) hole sealing bag (1) interval is bundled on the gas pumping pipe (2), simultaneously intrusion pipe (3) is passed hole sealing bag (1), the discharging opening of intrusion pipe (3) is positioned between the hole sealing bag (1); The bag of described hole sealing bag (1) middle part is provided with separating device to be opened/closed (11), and separating device (11) is divided into two parts of mutual isolation with bag, and corresponding two kinds of components that fill the expanded material I one by one in two parts bag;
2) separating device of hole sealing bag (1) is opened, two kinds of components of expanded material I in the hole sealing bag (1) are flowed to together, together send in the mash gas pumping drilling (4) with being about to hole sealing bag (1) and gas pumping pipe (2);
3) after the expanded material I foaming of hole sealing bag (1) solidifies, hole sealing bag forms seal section between (1), inject in the seal sections by two component mixed liquors of intrusion pipe (3) with the expanded material II that mixes, after expanded material II foaming solidifies, finish the sealing of hole operation.
2. mash gas pumping drilling method for sealing according to claim 1, it is characterized in that: described expanded material I is the hole-opening foaming material.
3. mash gas pumping drilling method for sealing according to claim 1 and 2 is characterized in that: described separating device (11) is for being held on the clips of bag external surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105733300A CN103015946A (en) | 2012-12-26 | 2012-12-26 | Hole-drilling and hole-sealing method for gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105733300A CN103015946A (en) | 2012-12-26 | 2012-12-26 | Hole-drilling and hole-sealing method for gas extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103015946A true CN103015946A (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105733300A Pending CN103015946A (en) | 2012-12-26 | 2012-12-26 | Hole-drilling and hole-sealing method for gas extraction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790546A (en) * | 2014-02-14 | 2014-05-14 | 河南理工大学 | Gas pre-pumping drilled hole coal dust backfill sealing method |
| CN111502591A (en) * | 2020-05-14 | 2020-08-07 | 白宝源 | Gas drainage drilling hole sealing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006053896A1 (en) * | 2004-11-18 | 2006-05-26 | Shell Internationale Research Maatschappij B.V. | Method of sealing an annular space in a wellbore |
| CN102022093A (en) * | 2010-12-10 | 2011-04-20 | 煤炭科学研究总院重庆研究院 | Reactive type foamy hole sealing system |
| CN201843572U (en) * | 2010-11-07 | 2011-05-25 | 山东浩珂矿业工程有限公司 | Bag type hole-sealing device |
| CN202325385U (en) * | 2011-12-02 | 2012-07-11 | 中煤科工集团重庆研究院 | Hole sealing bag with magnetic stirring function |
| CN102678084A (en) * | 2012-05-31 | 2012-09-19 | 中煤科工集团重庆研究院 | Cylindrical hole sealing bag |
-
2012
- 2012-12-26 CN CN2012105733300A patent/CN103015946A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006053896A1 (en) * | 2004-11-18 | 2006-05-26 | Shell Internationale Research Maatschappij B.V. | Method of sealing an annular space in a wellbore |
| CN201843572U (en) * | 2010-11-07 | 2011-05-25 | 山东浩珂矿业工程有限公司 | Bag type hole-sealing device |
| CN102022093A (en) * | 2010-12-10 | 2011-04-20 | 煤炭科学研究总院重庆研究院 | Reactive type foamy hole sealing system |
| CN202325385U (en) * | 2011-12-02 | 2012-07-11 | 中煤科工集团重庆研究院 | Hole sealing bag with magnetic stirring function |
| CN102678084A (en) * | 2012-05-31 | 2012-09-19 | 中煤科工集团重庆研究院 | Cylindrical hole sealing bag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790546A (en) * | 2014-02-14 | 2014-05-14 | 河南理工大学 | Gas pre-pumping drilled hole coal dust backfill sealing method |
| CN111502591A (en) * | 2020-05-14 | 2020-08-07 | 白宝源 | Gas drainage drilling hole sealing device |
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| CB02 | Change of applicant information |
Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Applicant after: China Coal Science and Industry Group Chongqing Research Institute Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Applicant before: China Coal Science and Industry Group Chongqing Research Institute |
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Application publication date: 20130403 |