CN102140901A - High pressure resistant drilled hole sealing method - Google Patents

High pressure resistant drilled hole sealing method Download PDF

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Publication number
CN102140901A
CN102140901A CN2011101232892A CN201110123289A CN102140901A CN 102140901 A CN102140901 A CN 102140901A CN 2011101232892 A CN2011101232892 A CN 2011101232892A CN 201110123289 A CN201110123289 A CN 201110123289A CN 102140901 A CN102140901 A CN 102140901A
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CN
China
Prior art keywords
sealing
pressure resistant
grouting pipe
boring
ball valve
Prior art date
Application number
CN2011101232892A
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Chinese (zh)
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CN102140901B (en
Inventor
翟成
林柏泉
张萌博
李全贵
Original Assignee
中国矿业大学
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Application filed by 中国矿业大学 filed Critical 中国矿业大学
Priority to CN2011101232892A priority Critical patent/CN102140901B/en
Publication of CN102140901A publication Critical patent/CN102140901A/en
Application granted granted Critical
Publication of CN102140901B publication Critical patent/CN102140901B/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like

Abstract

The invention relates to a high pressure resistant drilled hole sealing method. The method comprises the following steps of: inserting a first grouting pipe into a constructed drilled hole; pouring a high pressure resistant sealing material I with a grouting thickness L3 into a position which is 27 to 29m away from the top of the drilled hole by using the first grouting pipe, and after pouring, closing a ball valve; inserting a second grouting pipe with the depth of 1 to 2m, a third grouting pipe with the depth of 5 to 6m, and a return pipe which is positioned at the top of the drilled hole and has the depth of 2 to 3m into the dilled hole respectively; pouring a high pressure resistant sealing material II with a grouting thickness of L1 into the hole mouth of the drilled hole by using the second grouting pipe and sealing the hole, and after pouring, closing the ball valve; and after the high pressure resistant sealing materials at the front and rear sections in the drilled hole are solidificated, pouring compound polyurethane into an interlayer formed by blocking of the two sections of high-intensity sealing materials by using the third grouting pipe until the interlayer with the thickness L2 is filled, and closing a third ball valve and a fourth ball valve. The method is simple, and easy to operate, and has a good effect.

Description

A kind of high pressure resistant borehole sealing method
Technical field
The present invention relates to a kind of high pressure resistant borehole sealing method, be particularly useful for the sealing of borings such as coal mine down-hole drilling explosion aperture high pressure sealing, boring high-pressure hydraulic pressure break sealing of hole, blasting boreholes, pressure measurement boring, firedamp taking-out discharging drilling, coal-bed flooding boring and tunnel piercing, underground and underwater pouring system.
Technical background
The China Mine Geological complicated condition, high gas layer accounts for 50%-70%, and high gas low air permeability coal seam account for wherein about 70%.In order to improve the gas permeability of low air permeability coal seam, it is anti-reflection that technology such as the down-hole coal bed high-pressure hydraulic pressure break of normal employing, deep hole loosening blasting are carried out release to coal body, these technology all need be holed in the coal seam, make the coal body crack increase by the energy that injects the generation of water under high pressure or explosive charge, improve gas permeability of coal seam.One of them technical barrier high pressure sealing problem of holing exactly, for example the high-pressure hydraulic pressure break is implemented in the coal seam, in order to form effective crack network in coal body inside, coal seam for buried depth 1000m, the sealability of boring need be born the above hydraulic pressure of 30MPa, otherwise boring occurs leaking and influences fracturing effect.Because the coal and rock intensity lower (especially in soft rock stratum and coal seam) around the down-hole drilling, often there is microfissure around the boring, this situation has increased the difficulty of sealing, for quality and the pressure break success rate that guarantees fracturing, and must exploitation high pressure borehole sealing technology.The domestic materials such as cement mortar, hole packer, foamed polyurethane that generally adopt carry out borehole sealing at present, but in implementation process, tend to occur the phenomenon of the tight or sealing material insufficient strength of borehole sealing, cause water under high pressure leakage or high energy gas energy to discharge along borehole axial, be difficult to loosening to the effective release of formation of coal body around the boring, the coal body gas permeability changes little.
Summary of the invention
Technical problem: the objective of the invention is to overcome the deficiency in the prior art, provide that a kind of method is simple, the high pressure resistant borehole sealing method of processing ease.
Technical scheme: high pressure resistant borehole sealing method of the present invention comprises the steps:
A. in the boring of finishing of constructing, insert first Grouting Pipe;
B. be that I slip casting thickness L is injected at 27~29m place through first Grouting Pipe to drilling depth 3The I high-pressure resistant sealing material, close ball valve after having annotated;
C. in boring respectively insertion depth be 1~2m second Grouting Pipe, the 3rd Grouting Pipe that the degree of depth is 5~6m, be positioned at the boring top and the degree of depth is the return pipe of 2 ~ 3m;
D. inject II slip casting thickness L by second Grouting Pipe at drilling orifice 1The II high-pressure resistant sealing material carry out sealing of hole, close ball valve after having annotated;
E. after two sections high-pressure resistant sealing material solidifies before and after in waiting to hole, inject composite polyurethane by the 3rd Grouting Pipe to intercepting in the interlayer that forms, until being full of compartment thickness L by two sections high strength encapsulants 2, close the 3rd ball valve, the 4th ball valve.
To be compressive resistance freeze material greater than the expansive cement of 30MPa to described high strength encapsulant; Described I, II slip casting thickness L 3, L 1Be 1 ~ 2m; Be equipped with the presbyopia of 0.5 ~ 1m on all Grouting Pipe front end tube walls; Described flexible material is a composite polyurethane.
Beneficial effect: the present invention adopts the multistage sealing medium of " hard ~ soft ~ hard " to seal in the borehole sealing process according to " strong and weak strong " structure control mechanics effect.The hard medium in two has guaranteed the intensity of borehole sealing, the energy that the soft-medium at middle part then makes explosion produce absorbs to a certain extent and acts on every side on the coal body, the sealability of boring can be born the above hydraulic pressure of 30MPa, can solve the problem that the boring compressive resistance is not enough, borehole sealing is not tight, the sealing of hole position can't be confirmed.Its method is simple, processing ease, has practicality widely.
Description of drawings
Fig. 1 is a drilling and sealing method schematic diagram of the present invention
Among the figure: 1-1-first Grouting Pipe, 1-2-second Grouting Pipe, 1-3-the 3rd Grouting Pipe, 2-1-endoporus encapsulant, the outer hole of 2-2-encapsulant, 3-flexible material, 4-boring, 5-return pipe; 6-1-first ball valve, 6-2-second ball valve, 6-3-the 3rd ball valve, 6-4-the 4th ball valve.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
High pressure resistant borehole sealing method of the present invention is at first in the coal seam more than the construction depth 40m, insert the first Grouting Pipe 1-1 in the boring of finishing 4 of constructing of aperture φ 113mm; Is that I slip casting thickness L is injected at 27~29m place through the first Grouting Pipe 1-1 to boring 4 degree of depth 3Be the I high-pressure resistant sealing material 2-1 of 1 ~ 2m, to be compressive resistance freeze material greater than the expansive cement of 30MPa to the encapsulant of anti-high strength 2-1.I slip casting thickness L 3Close ball valve 6-1 after having annotated; In boring 4 respectively insertion depth be the second Grouting Pipe 1-2, the degree of depth of 1~2m be 5~6m the 3rd Grouting Pipe 1-3, be positioned at boring 4 tops and the degree of depth is the return pipe 5 of 2 ~ 3m, be equipped with the presbyopia of 0.5 ~ 1m on all Grouting Pipe front end tube walls.Inject II slip casting thickness L in the aperture of boring 4 by the second Grouting Pipe 1-2 1The II high-pressure resistant sealing material 2-2 that is 1 ~ 2m carries out sealing of hole, II slip casting thickness L 1Close ball valve 6-2 after having annotated; Two sections I slip casting thickness L before and after waiting to hole in 4 3, II slip casting thickness L 1After the high-pressure resistant sealing material layer solidifies, by the 3rd Grouting Pipe 1-3 to intercept the interlayer L that forms by two sections high strength encapsulants 2The middle flexible material 3 that injects composite polyurethane is until the compartment thickness L that is full of 24 ~ 26m 2, in return pipe 5, flow out slurries, show compartment thickness L 2Be full of, close the 3rd ball valve 6-3, the 4th ball valve 6-4 this moment, high pressure resistant borehole sealing finishes.

Claims (5)

1. a high pressure resistant borehole sealing method is characterized in that comprising the steps:
A. insert first Grouting Pipe (1-1) in the boring of finishing to constructing (4);
B. be that I slip casting thickness L is injected at 27~29m place through first Grouting Pipe (1-1) to boring (4) degree of depth 3I high-pressure resistant sealing material (2-1), close ball valve (6-1) after having annotated;
C. in boring (4) respectively insertion depth be 1~2m second Grouting Pipe (1-2), the 3rd Grouting Pipe (1-3) that the degree of depth is 5~6m, be positioned at boring (4) top and the degree of depth is the return pipe (5) of 2 ~ 3m;
D. inject II slip casting thickness L in boring (4) aperture by second Grouting Pipe (1-2) 1II high-pressure resistant sealing material (2-2) carry out sealing of hole, close ball valve (6-2) after having annotated;
E. after two sections high-pressure resistant sealing material solidifies before and after treating in the boring (4), inject flexible material (3) by the 3rd Grouting Pipe (1-3) to intercepting in the interlayer that forms, until being full of compartment thickness L by two sections high strength encapsulants 2, close the 3rd ball valve (6-3), the 4th ball valve (6-4).
2. high pressure resistant borehole sealing method according to claim 1 is characterized in that: to be compressive resistance freeze material greater than the expansive cement of 30MPa to described high strength encapsulant.
3. high pressure resistant borehole sealing method according to claim 1 is characterized in that: described I, II slip casting thickness L 3,L 1Be 1 ~ 2m.
4. high pressure resistant borehole sealing method according to claim 1 is characterized in that: the presbyopia that all has 0.5 ~ 1m on described all Grouting Pipe front end tube walls.
5. high pressure resistant borehole sealing method according to claim 1 is characterized in that: described flexible material (3) is a composite polyurethane.
CN2011101232892A 2011-05-13 2011-05-13 High pressure resistant drilled hole sealing method CN102140901B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2011101232892A CN102140901B (en) 2011-05-13 2011-05-13 High pressure resistant drilled hole sealing method
PCT/CN2012/073193 WO2012155696A1 (en) 2011-05-13 2012-03-28 High-pressure resistant drilled hole sealing method

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CN102140901A true CN102140901A (en) 2011-08-03
CN102140901B CN102140901B (en) 2013-11-20

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
CN102287163A (en) * 2011-09-08 2011-12-21 重庆市能源投资集团科技有限责任公司 Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole
CN102434194A (en) * 2011-09-30 2012-05-02 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
CN102628345A (en) * 2012-04-23 2012-08-08 中国矿业大学 Sealing method of high sealing quasi-horizontal drilling hole
CN102628352A (en) * 2012-04-23 2012-08-08 中国矿业大学 Multi-section fixed point hydraulic fracturing method
CN102704986A (en) * 2012-06-26 2012-10-03 河北同成矿业科技有限公司 Pressure-controlled hole sealing method for gas drainage hole
CN102747980A (en) * 2012-07-18 2012-10-24 中国矿业大学 Expansion type multi-grade pressurized rapid hole sealing technology
CN102787820A (en) * 2012-08-24 2012-11-21 中煤科工集团重庆研究院 Hole sealing and drilling method for downhole gas extraction in coal mine
WO2012155696A1 (en) * 2011-05-13 2012-11-22 中国矿业大学 High-pressure resistant drilled hole sealing method
CN102913183A (en) * 2012-10-26 2013-02-06 河南理工大学 Multifunctional pneumatic sealing device and matched sealing process thereof
CN102913184A (en) * 2012-10-26 2013-02-06 河南理工大学 Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier
CN103133028A (en) * 2013-03-12 2013-06-05 河南理工大学 Underground coal seam hydrofracture crack oriented developing method
CN103195390A (en) * 2013-04-10 2013-07-10 山西潞安环保能源开发股份有限公司 Mining-coal bed nearly horizontal gas extraction borehole sealing method
CN103362548A (en) * 2013-07-09 2013-10-23 淮南矿业(集团)有限责任公司 Grouting device
CN103742115A (en) * 2013-12-18 2014-04-23 中国矿业大学 Underground coal mine fracture sealing device and method
CN104265237A (en) * 2014-09-03 2015-01-07 安徽理工大学 Gas extraction hole sealing method
CN104763372A (en) * 2015-02-12 2015-07-08 中国矿业大学 Pretreatment method for improving compactness of coal seam water injection hole
CN106246135A (en) * 2016-08-31 2016-12-21 重庆松藻煤电有限责任公司 A kind of quickly pocket type filter press seal aperture apparatus and method
CN106837406A (en) * 2016-11-28 2017-06-13 田成林 A kind of coal seam with gas multistage anti-reflection method
CN111894655A (en) * 2020-06-24 2020-11-06 中国矿业大学 Low-temperature fluid quick-freezing ice blocking method for gas extraction drill hole

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CN105952414A (en) * 2016-05-17 2016-09-21 太原理工大学 Oil shale in situ heat injection exploitation drilling well cementation method

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WO2012155696A1 (en) * 2011-05-13 2012-11-22 中国矿业大学 High-pressure resistant drilled hole sealing method
CN102287163B (en) * 2011-09-08 2013-09-11 重庆市能源投资集团科技有限责任公司 Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole
CN102287163A (en) * 2011-09-08 2011-12-21 重庆市能源投资集团科技有限责任公司 Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole
CN102434194B (en) * 2011-09-30 2015-03-11 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
CN102434194A (en) * 2011-09-30 2012-05-02 神华集团有限责任公司 Gas drainage drill hole structure formed in coal layer and method for fabricating same
CN102628345A (en) * 2012-04-23 2012-08-08 中国矿业大学 Sealing method of high sealing quasi-horizontal drilling hole
CN102628352A (en) * 2012-04-23 2012-08-08 中国矿业大学 Multi-section fixed point hydraulic fracturing method
CN102628352B (en) * 2012-04-23 2014-07-16 中国矿业大学 Multi-section fixed point hydraulic fracturing method
CN102628345B (en) * 2012-04-23 2014-07-16 山西潞安环保能源开发股份有限公司 Sealing method of high sealing quasi-horizontal drilling hole
CN102704986A (en) * 2012-06-26 2012-10-03 河北同成矿业科技有限公司 Pressure-controlled hole sealing method for gas drainage hole
CN102747980A (en) * 2012-07-18 2012-10-24 中国矿业大学 Expansion type multi-grade pressurized rapid hole sealing technology
CN102787820B (en) * 2012-08-24 2015-07-01 中煤科工集团重庆研究院有限公司 Hole sealing and drilling method for downhole gas extraction in coal mine
CN102787820A (en) * 2012-08-24 2012-11-21 中煤科工集团重庆研究院 Hole sealing and drilling method for downhole gas extraction in coal mine
CN102913183B (en) * 2012-10-26 2015-11-04 河南理工大学 Multifunctional pneumatic power hole sealing device and the hole-sealing technology supporting with it
CN102913183A (en) * 2012-10-26 2013-02-06 河南理工大学 Multifunctional pneumatic sealing device and matched sealing process thereof
CN102913184B (en) * 2012-10-26 2015-05-27 河南理工大学 Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier
CN102913184A (en) * 2012-10-26 2013-02-06 河南理工大学 Secondary composite high-pressure grouting and sealing process of gas drainage drilling artificial separation barrier
CN103133028A (en) * 2013-03-12 2013-06-05 河南理工大学 Underground coal seam hydrofracture crack oriented developing method
CN103195390A (en) * 2013-04-10 2013-07-10 山西潞安环保能源开发股份有限公司 Mining-coal bed nearly horizontal gas extraction borehole sealing method
CN103195390B (en) * 2013-04-10 2015-08-05 山西潞安环保能源开发股份有限公司 The nearly horizontal mash gas pumping drilling encapsulating method in this coal seam a kind of
CN103362548A (en) * 2013-07-09 2013-10-23 淮南矿业(集团)有限责任公司 Grouting device
CN103362548B (en) * 2013-07-09 2016-02-03 淮南矿业(集团)有限责任公司 Provisions for grouting
CN103742115A (en) * 2013-12-18 2014-04-23 中国矿业大学 Underground coal mine fracture sealing device and method
CN103742115B (en) * 2013-12-18 2016-03-23 中国矿业大学 A kind of coal mine underground fracturing sealing device and method
CN104265237A (en) * 2014-09-03 2015-01-07 安徽理工大学 Gas extraction hole sealing method
CN104763372A (en) * 2015-02-12 2015-07-08 中国矿业大学 Pretreatment method for improving compactness of coal seam water injection hole
CN106246135A (en) * 2016-08-31 2016-12-21 重庆松藻煤电有限责任公司 A kind of quickly pocket type filter press seal aperture apparatus and method
CN106246135B (en) * 2016-08-31 2018-09-28 重庆能投渝新能源有限公司 A kind of quick pocket type filtering pressure hole sealing device and method
CN106837406A (en) * 2016-11-28 2017-06-13 田成林 A kind of coal seam with gas multistage anti-reflection method
CN111894655A (en) * 2020-06-24 2020-11-06 中国矿业大学 Low-temperature fluid quick-freezing ice blocking method for gas extraction drill hole

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