CN105114030B - A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling - Google Patents
A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling Download PDFInfo
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- CN105114030B CN105114030B CN201510515514.5A CN201510515514A CN105114030B CN 105114030 B CN105114030 B CN 105114030B CN 201510515514 A CN201510515514 A CN 201510515514A CN 105114030 B CN105114030 B CN 105114030B
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- sealing
- pressure
- hole
- slurries
- gas pumping
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- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 78
- 239000002002 slurry Substances 0.000 title claims abstract description 54
- 238000005086 pumping Methods 0.000 title claims abstract description 40
- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007569 slipcasting Methods 0.000 claims abstract description 30
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 239000013589 supplement Substances 0.000 claims abstract description 6
- 229920001971 elastomer Polymers 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 31
- 229920002635 polyurethane Polymers 0.000 claims description 16
- 239000004814 polyurethane Substances 0.000 claims description 16
- 239000004615 ingredient Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 3
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims description 3
- 229910052912 lithium silicate Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229940080314 sodium bentonite Drugs 0.000 claims description 3
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000009955 starching Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000011049 filling Methods 0.000 abstract description 3
- 239000003566 sealing material Substances 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229940092782 bentonite Drugs 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000023753 dehiscence Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011405 expansive cement Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling, semifluid sealing material is injected in the confined space of two sections of expansion plugging materials formation with certain pressure by grouting pump, continue slip casting for a period of time after filling sealing of hole sections, until its internal slurries reaches certain pressure, stop slip casting；Then preliminary extraction is carried out to the high concentration gas in drilling using extraction pipeline, while the pressure change inside slurries is monitored by the pressure measurement hollow rubber ball being built in before injection hole sealing in sealing of hole section in real time, and pressure reading is obtained by the U-tube positioned at aperture being attached thereto；Once internal pressure drops to the pressure of triggering slurries supplement, then start to supplement slurries into sealing of hole section, until reaching required pressure again.The slurries for the semifluid shape that this method is simple and convenient to operate, the mobility under constant pressure is extremely strong can actively block the crack newly developed around drilling at any time, improve sealing of hole effect, have wide applicability.
Description
Technical field
The present invention relates to a kind of method for sealing of mash gas pumping drilling, suitable for stope, crossdrift see at coal, coal road
Deng the sealing of the firedamp taking-out discharging drilling in place, the sealing of aqueous drilling is particularly suitable for.
Background technology
Gas pumping be prevent coal mine gas disaster accident essential measure, gas drainage borehole sealing quality and effectively
The extraction cycle determines the effect of mine gas extraction, and gas pumping rate be weigh extracting result important parameter it
One, therefore effective hole sealing technology of gas drainage borehole is to improve the vital link of extraction rate.Gas pumping initial stage its
Concentration is generally higher, can achieve the desired results, but with the continuity of gas drainage system, effective stress, desorption gas,
Under the comprehensive functions such as negative pressure of suction, extraction borehole wall-rock crack is developed rapidly, extended, and deforming destruction and occurs a large amount of secondary
Crack, sealing of hole sections expand crack with the wall of a borehole or its country rock and form " gas leakage " passage, cause extraction later stage aperture extraction negative pressure anxious
Play declines, and reduces gas pumping effect, and shortens drilling effective extraction cycle, seriously affects coal bed gas extraction rate.Pin
A large amount of newborn porous dehiscence gaps are constantly produced to the country rock that drills during the especially aqueous coal bed gas extraction in coal seam, cause to draw out methane
The technical barriers such as concentration is low, effective extraction cycle is short, traditional method for sealing (including expansive cement mortar, yellow mud etc.)
It can only disposably be blocked for the crack produced around drilling, and block slurries and be frozen into the drilling of high humility
Shape needs to wait longer time, influences the normal duration；After sealing material solidification it is general as the shrinkage of itself and
Borehole space is set not to be completely filled up, so as to cause Fractured zone to be difficult to effectively block, drilling gas leakage is serious, and airtight quality is poor；
The crack around drilling is blocked using secondary hole sealing technology on the basis of a sealing of hole, not only takes work consuming, but also will
Special secondary hole sealing equipment is purchased, increases production cost.To solve the sealing problem of aqueous mash gas pumping drilling, there is an urgent need to
A kind of effective method for sealing.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, present invention offer one kind is easy to operate, cost is low
Aqueous mash gas pumping drilling encapsulating method honest and clean, that borehole sealing effect can be increased substantially.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling, includes the following steps：
(1) position that sealing of hole sections left and right ends are corresponded in gas pumping pipe bundlees a polyurethane sealing of hole bag respectively, passes through
The polyurethane sealing of hole bag of left end bundles Grouting Pipe and pvc pipe with gas pumping pipe, and the left end of Grouting Pipe and pvc pipe is equal
Positioned at the left side of the polyurethane sealing of hole bag of left end, the right end of Grouting Pipe and pvc pipe is respectively positioned between two polyurethane sealing of hole bags；
The left end of pvc pipe connects a U-tube, and the right end of pvc pipe connects a hollow pressure measurement ball；
(2) after mash gas pumping drilling drills pore-forming, the gas pumping pipe that will be handled through step (1) is sent into gas pumping
Designated position in drilling, U-tube bottom is downward；The injection observation liquid in U-tube, in hollow pressure measurement ball no pressure situation
Under, the observation liquid level of both sides is consistent in U-tube；
(3) the polyurethane sealing of hole bag reaction expansion of sealing of hole sections left and right ends, finally so that sealing of hole sections form sealing space, beats
The slip casting tube valve in Grouting Pipe is opened, semifluid slurries are injected into sealing of hole sections, up to the observation liquid level of both sides in U-tube
Difference in height reaches the stopping slip casting height of setting, closes slip casting tube valve；
(4) when the observation liquid level difference of both sides in U-tube reaches the beginning slip casting height of setting, slip casting is opened
Tube valve, until the observation liquid level difference of both sides reaches the stopping slip casting height of setting in U-tube；Repeat step, is protected
Hydraulic pressure in card sealing of hole sections is remained in a constant pressure limit.
Preferably, the hollow appreciable minimum pressure of pressure measurement ball is 0.1MPa, and hollow pressure measurement ball can be felt
The maximum pressure known is 4MPa.Sealing of hole sections entoplasm liquid pressure range is 0~3Mpa, in order at the same time ensure measure height pressure when
Pressure measurement precision, selects the higher hollow pressure measurement ball of susceptibility as in slurries, and is higher by slurries highest pressure-bearing about
The maximum pressure measurement limit of the 1Mpa as hollow pressure measurement ball, to ensure that hollow pressure measurement ball can still be protected when pressure-bearing is larger
Hold pressure measurement precision.
Preferably, after opening slip casting tube valve, semifluid slurries will be injected with the pressure of 2~3MPa into sealing of hole sections.When
When slurries pressure-bearing is injected, if pressure is too small, slurries can not deeply block borehole wall crack；If pressure is too big, drilling can be extruded
Hole wall and sealing of hole sections both ends plugging material, easily cause borehole failure.It is final to determine to starch when choosing 2~3MPa as injection slurries
The pressure section of liquid pressure-bearing.
Preferably, the stopping slip casting of the setting highly for both sides observation liquid level difference reach 200~
210mm, the beginning slip casting of the setting highly reach 150~160mm for the observation liquid level difference of both sides.U-tube two
When side liquid level is equal, liquid level is 150mm, and left side liquid level often raises 10mm, and pressure increases 0.5Mpa in hole, when hole internal pressure
It is strong when be 0~0.5Mpa, and when liquid level is 150~160mm, hole entoplasm hydraulic pressure is insufficient by force, starts supplement slurries；When in hole
When pressure is 2.5~3Mpa, and when liquid level is 200~210mm, hole entoplasm hydraulic pressure reaches by force predetermined pressure, stops slip casting.
Preferably, the semifluid slurries are non-condensable, inorganic semifluid sealing of hole slurries.As a kind of inorganic material
Material, will not produce heat, non-condensable, viscid state can cause slurries in the work of pressure during stirring, injection
Fill hole wall crack at any time under.
Preferably, the semifluid slurries are the mixture of major ingredient, auxiliary material and water, and wherein major ingredient is sodium bentonite and height
The mixing of ridge soil, auxiliary material is sodium metasilicate, mixing more than lithium metasilicate, silica, one or both of sodium chloride, major ingredient with
The quality of auxiliary material and be 1 with the mass ratio of water：8~12.Bentonite and kaolin can keep the moisture of slurries not to be lost in, and
There is certain lubricating action, be conducive to slurries and penetrate into filled opening.Auxiliary material effect, which essentially consists in, makes slurry volume keep necessarily
Volume, and good hydrophily, will not produce segregation phenomenon.Material-water ratio is maintained at 1：8~12, the thick dilution of slurries is most suitable at this time
Preferably permeate closure hole wall crack.
Preferably, the semifluid slurries are not dehydrated all the time within the whole service life cycle of mash gas pumping drilling.For
The crack produced around gas extraction hole during mash gas extraction can be blocked in real time, and slurries must keep mobility at the moment.
Beneficial effect：The non-condensable constant pressure slurries method for sealing of mash gas pumping drilling provided by the invention, to drill in into
During row sealing, the sealing of hole slurries of semifluid shape are injected with certain pressure, one section of pressure injection of band is continued to after filling confined space
Time, stops the pressure threshold value of slip casting until reaching prompting.The sealing of hole slurries noted are in a kind of state of opposite constant pressure all the time,
So once the crack newly developed around occurs in drilling, slurries molecule can actively permeate, and cram crack automatically, and isolation gas leakage is led to
Road, reduces the entrance of air, so as to improve gas extraction concentration.And during whole extraction, the slurries in sealing of hole sections begin
It is not dehydrated eventually, semi-fluid condition is kept, so being particularly suitable for blocking aqueous gas drilling.Present method solves gas pumping mistake
Newborn crack is difficult to the problem of closure in journey, its method is simple, effect easy to operate, being remarkably improved gas pumping, has pole
Good promotional value.
Brief description of the drawings
Fig. 1 is the implementation schematic diagram of the present invention；
In figure：1-mash gas pumping drilling, 2-sealing of hole sections, 3-gas pumping pipe, 4-Grouting Pipe, 5-hollow pressure measurement rubber
Glueballs, 6-U-tube, 7-pvc pipe, 8-polyurethane sealing of hole bag, 9-gas pumping tube valve, 10-slip casting tube valve, 11-
Semifluid slurries, 12-gas, 13 cracks group.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling, by grouting pump with certain pressure by semifluid
Sealing material is injected in the confined space that two sections of expansion plugging materials are formed, and continues slip casting for a period of time after filling sealing of hole sections, directly
Reach certain pressure to its internal slurries, stop slip casting；Then the high concentration gas in drilling is carried out using extraction pipeline
Preliminary extraction, while the pressure measurement hollow rubber ball by being built in before injection hole sealing in sealing of hole section is monitored inside slurries in real time
Pressure change, and pressure reading is obtained by the U-tube positioned at aperture being attached thereto；Once internal pressure drops to triggering
The pressure of slurries supplement, then start to supplement slurries into sealing of hole section, until reaching required pressure again.This method is specifically wrapped
Include following steps：
(1) position that 2 left and right ends of sealing of hole sections are corresponded in gas pumping pipe 3 bundlees a polyurethane sealing of hole bag 8 respectively, leads to
The polyurethane sealing of hole bag 8 for crossing left end bundles Grouting Pipe 4 and pvc pipe 7 with gas pumping pipe 3, Grouting Pipe 4 and pvc pipe 7
Left end be respectively positioned on left end polyurethane sealing of hole bag 8 left side, the right end of Grouting Pipe 4 and pvc pipe 7 is respectively positioned on two polyurethane sealings
Between hole bag 8；The left end of pvc pipe 7 connects a U-tube 6, and the right end of pvc pipe 7 connects a hollow pressure measurement ball 5；It is hollow
5 appreciable minimum pressure of pressure measurement ball is 0.1MPa, and hollow 5 appreciable maximum pressure of pressure measurement ball is 4MPa；
(2) conventionally construct in the drill site of tunnel mash gas pumping drilling 1, when mash gas pumping drilling 1 is drilled pore-forming
After, the gas pumping pipe 3 that will be handled through step (1) is sent into designated position in mash gas pumping drilling 1, and 6 bottom of U-tube is downward；
The injection observation liquid in U-tube 6, in the case of hollow 5 no pressure of pressure measurement ball, the observation liquid water of both sides in U-tube 6
It is flat highly consistent；As shown in Figure 1；
(3) the reaction expansion of polyurethane sealing of hole bag 8 of 2 left and right ends of sealing of hole sections, finally so that the formation sealing of sealing of hole sections 2 is empty
Between, the slip casting tube valve 10 in Grouting Pipe 4 is opened, semifluid slurries 11 will be injected with the pressure of 2~3MPa into sealing of hole sections 2,
Until the observation liquid level difference of both sides reaches stopping slip casting height (the observation liquid level of both sides of setting in U-tube 6
Difference in height reaches 200~210mm), close slip casting tube valve 10；
(4) when the observation liquid level difference of both sides in U-tube 6 reaches the beginning slip casting height (sight of both sides of setting
Survey liquid level difference and reach 150~160mm) when, slip casting tube valve 10 is opened, up to the observation liquid of both sides in U-tube 6
Difference in level reaches the stopping slip casting height of setting；Repeat step 4, ensures that the hydraulic pressure in sealing of hole sections 2 remains at one
In constant pressure limit.
The semifluid slurries 11 are non-condensable, inorganic semifluid sealing of hole slurries, by the mixing of major ingredient, auxiliary material and water
Into wherein major ingredient is sodium bentonite and kaolinic mixing, and auxiliary material is sodium metasilicate, in lithium metasilicate, silica, sodium chloride
The quality of one or more kinds of mixing, major ingredient and auxiliary material and be 1 with the mass ratio of water：8~12；The semifluid slurries 11
It is not dehydrated all the time within the whole service life cycle of mash gas pumping drilling 1.
The above is only the 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 also should
It is considered as protection scope of the present invention.
Claims (4)
- A kind of 1. non-condensable constant pressure slurries method for sealing of mash gas pumping drilling, it is characterised in that：Include the following steps：(1) a polyurethane sealing of hole bag (8) is bundled respectively in the position of corresponding sealing of hole sections (2) left and right ends of gas pumping pipe (3), Grouting Pipe (4) and pvc pipe (7) are bundled with gas pumping pipe (3) by the polyurethane sealing of hole bag (8) of left end, slip casting The left end of pipe (4) and pvc pipe (7) is respectively positioned on the left side of the polyurethane sealing of hole bag (8) of left end, Grouting Pipe (4) and pvc pipe (7) Right end is respectively positioned between two polyurethane sealing of hole bags (8)；The left end of pvc pipe (7) connects a U-tube (6), the right side of pvc pipe (7) One hollow pressure measurement ball (5) of end connection；(2) after mash gas pumping drilling (1) drills pore-forming, the gas pumping pipe (3) that will be handled through step (1) is sent into gas pumping Borehole (1) interior designated position, U-tube (6) bottom is downward；The injection observation liquid in U-tube (6), in hollow pressure measurement rubber In the case of ball (5) no pressure, the observation liquid level of U-tube (6) interior both sides is consistent；(3) polyurethane sealing of hole bag (8) the reaction expansion of sealing of hole sections (2) left and right ends, finally so that sealing of hole sections (2) formation sealing is empty Between, the slip casting tube valve (10) in Grouting Pipe (4) is opened, to the interior injection semifluid slurries (11) of sealing of hole sections (2), until U-tube (6) the observation liquid level difference of interior both sides reaches the stopping slip casting height of setting, closes slip casting tube valve (10)；(4) when the observation liquid level difference of U-tube (6) interior both sides reaches the beginning slip casting height of setting, slip casting is opened Tube valve (10), until the observation liquid level difference of U-tube (6) interior both sides reaches the stopping slip casting height of setting；Repeat Step (4), ensures that the hydraulic pressure in sealing of hole sections (2) is remained in a constant pressure limit；When U-tube both sides liquid level is equal, liquid level is 150mm, and left side liquid level often raises 10mm, and pressure increases in hole 0.5Mpa, when pressure is 0~0.5Mpa in hole and when liquid level difference is 150~160mm, hole entoplasm hydraulic pressure is insufficient by force, opens The supplement that begins slurries；When pressure is 2.5~3Mpa in hole and when liquid level difference is 200~210mm, hole entoplasm hydraulic pressure reaches by force Predetermined pressure, stops slip casting；The semifluid slurries (11) are non-condensable, inorganic semifluid sealing of hole slurries, and the semifluid slurries (11) are in gas It is not dehydrated all the time in the whole service life cycle of extraction borehole (1).
- 2. the non-condensable constant pressure slurries method for sealing of mash gas pumping drilling according to claim 1, it is characterised in that：The sky Heart pressure measurement ball (5) appreciable minimum pressure is 0.1MPa, and the appreciable maximum pressure of hollow pressure measurement ball (5) is 4MPa。
- 3. the non-condensable constant pressure slurries method for sealing of mash gas pumping drilling according to claim 1, it is characterised in that：Open note After starching tube valve (10), semifluid slurries (11) will be injected with the pressure of 2~3MPa into sealing of hole sections (2).
- 4. the non-condensable constant pressure slurries method for sealing of mash gas pumping drilling according to claim 1, it is characterised in that：Described half Fluid slurry (11) is the mixture of major ingredient, auxiliary material and water, and wherein major ingredient is for sodium bentonite and kaolinic mixing, auxiliary material Mixing more than one or both of sodium metasilicate, lithium metasilicate, silica, sodium chloride, the quality and water of major ingredient and auxiliary material Mass ratio is 1：8~12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510515514.5A CN105114030B (en) | 2015-08-20 | 2015-08-20 | A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling |
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| CN201510515514.5A CN105114030B (en) | 2015-08-20 | 2015-08-20 | A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling |
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| CN105114030B true CN105114030B (en) | 2018-05-08 |
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| CN204476353U (en) * | 2015-02-06 | 2015-07-15 | 河南工程学院 | A kind of mash gas pumping drilling plugging device |
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