CN113700522A - Gas extraction process method of lower screen pipe while drilling and matched lower screen pipe drill bit - Google Patents
Gas extraction process method of lower screen pipe while drilling and matched lower screen pipe drill bit Download PDFInfo
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- CN113700522A CN113700522A CN202111031316.3A CN202111031316A CN113700522A CN 113700522 A CN113700522 A CN 113700522A CN 202111031316 A CN202111031316 A CN 202111031316A CN 113700522 A CN113700522 A CN 113700522A
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- screen pipe
- sieve tube
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- 238000005553 drilling Methods 0.000 title claims abstract description 97
- 238000000605 extraction Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000003245 coal Substances 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000003566 sealing material Substances 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011152 fibreglass Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000002893 slag Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a gas extraction process method of a screen pipe while drilling, which comprises the following steps: drilling a hole to penetrate through the working face to a roadway II on the other side by using a drilling machine of a roadway I on one side of the coal seam working face through a drill rod and a drill bit for conventional drilling, and forming a drilled hole; replacing a drill bit for conventional drilling with a lower sieve tube drill bit, wherein two ends of the lower sieve tube drill bit are respectively connected with the drill rod and the adapter, the other end of the adapter is connected with a plurality of sieve tubes which are connected in sequence, the lower sieve tube drill bit is driven by the drilling machine to rotate and return to the roadway I, and meanwhile, the lower sieve tube drill bit brings the sieve tubes which are connected in sequence to a drilling orifice of the roadway I through the adapter; and removing the sieve tubes at the drilling hole openings of the roadway I and the roadway II, and sealing the hole sealing sections of the roadway I and the roadway II by using hole sealing materials. The invention also provides a matched lower sieve tube drill bit. The process method and the lower screen pipe drill bit solve the problems that deformation and collapse after drilling construction affect coal extraction and the lower screen pipe is not easy to feed.
Description
Technical Field
The invention relates to the technical field of coal gas extraction, in particular to a gas extraction process method of a lower sieve tube while drilling and a matched lower sieve tube drill bit.
Background
Gas is an important disaster-causing hidden danger in the coal mining process. At present, the gas existing in the coal body of a working face is continuously extracted by generally adopting a mode of constructing coal bed bedding holes, so that the effects of permeability increasing and outburst elimination are achieved.
In the traditional extraction process, long drill holes which do not penetrate through a coal seam are respectively constructed along the coal seam in roadways on two sides of a working face, hole sealing is respectively carried out at the hole openings of the two drill holes, a gas extraction pipeline and an extraction pump station are respectively connected, gas in the coal seam is extracted, extraction drill holes are respectively constructed on two sides of the roadway, and the engineering quantity is large; after the construction of the bedding hole is finished, in the process of extraction, due to the influence of ground stress and mining, deformation, collapse and other phenomena easily occur in a drill hole, and the extraction effect is influenced; the other type is a sieve tube arranged at the same side of the outside of the drill rod, and the problems of complex construction process and high requirement on the wear resistance of the sieve tube exist.
Disclosure of Invention
The invention aims to provide a method for extracting gas by using a lower screen pipe while drilling and a matched lower screen pipe drill bit, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a gas extraction process method of a screen pipe while drilling comprises the following steps:
the method comprises the following steps: drilling a hole to penetrate through the working face to a roadway II on the other side by using a drilling machine of a roadway I on one side of the coal seam working face through a drill rod and a drill bit for conventional drilling, and forming a drilled hole;
step two: replacing a conventional drilling bit as a lower sieve tube drilling bit, wherein two ends of the lower sieve tube drilling bit are respectively connected with the drill rod and the adapter, and the other end of the adapter is connected with a plurality of sieve tubes which are sequentially connected;
step three: the drilling machine drives a lower sieve tube drill bit to rotate and retreat to a roadway I, meanwhile, the lower sieve tube drill bit brings a plurality of sieve tubes which are sequentially connected to a drilling orifice of the roadway I through an adapter, and meanwhile, water is injected into a drill rod and the lower sieve tube drill bit through a high-pressure pump station to achieve jet flow deslagging;
step four: removing the sieve tube at the drilling hole opening positions of the roadway I and the roadway II, sealing hole sealing sections of the roadway I and the roadway II by using hole sealing materials, embedding a gas extraction pipe in the middle of the hole sealing materials of the roadway I and/or the roadway II, wherein one end of the gas extraction pipe extends into the sieve tube, the other end of the gas extraction pipe is connected with a gas extraction main pipeline, and the gas extraction main pipeline is additionally connected with an extraction pump station;
step five: and repeating the first step to the fourth step to finish the multi-group extraction drilling construction and hole sealing continuous extraction of the working face.
Furthermore, the drilling machine is a directional drilling machine, the drill bit for conventional drilling is a screw drill bit, the drill rod is a directional drill rod, and the drill rod penetrates through the whole coal seam working face through construction directional drilling.
Furthermore, the sieve tube is made of PVC, PE hard plastics, glass fiber reinforced plastics or iron pipes.
Further, the outer diameter of the sieve tube is smaller than the maximum outer diameter of the lower sieve tube drill bit, and the maximum outer diameter of the lower sieve tube drill bit is smaller than the maximum outer diameter of the conventional drill bit for drilling.
Furthermore, the adapter can also be a bearing with a flange plate, and the lower sieve tube drill bit and the sieve tube can rotate relatively after being connected through the bearing with the flange plate.
And furthermore, a drilling machine for jacking pipes is arranged on one side of the roadway II to provide assistance for rotation and movement of the sieve pipe and the lower sieve pipe drill bit.
The invention also provides a matched lower screen pipe drill bit of the process method for extracting the gas of the lower screen pipe while drilling, which comprises a drill rod connecting section, drill bit gear teeth, a drill bit jet hole, a drill bit body and an end connector; the drill bit body is arranged at the tail end of the drill rod connecting section, at least 3 groups of drill bit gear teeth are distributed on the drill bit body, a plurality of groups of drill bit jet holes are uniformly distributed on the drill rod connecting section along the circumferential direction, a downward convex end connector is arranged at the center of the bottom end face of the drill bit body, the end connector is of an annular boss structure, an internal thread is arranged on the annular boss, and the internal thread is used for being connected with a rotary joint so as to be connected with a sieve pipe.
Furthermore, the drill rod connecting section is in a hollow cylinder shape, and an internal thread is arranged at the top end of the hollow cylinder.
Furthermore, the bottom surface of the end connector is provided with 4 bolts for connecting with a bearing with a flange plate.
Furthermore, 4 groups of drill bit jet holes are arranged, and every two drill bit jet holes vertically distributed from top to bottom form a group.
Compared with the prior art, the invention has the beneficial effects that: the method for extracting the gas by drilling the coal body and arranging the sieve tube while drilling and the drill bit for the lower sieve tube perform coal body extraction by adopting a mode of drilling through the coal body and arranging the sieve tube while drilling, solves the problems that the coal body extraction is influenced by deformation and collapse after drilling construction and the lower sieve tube is difficult to feed.
Drawings
The invention is further described with reference to the following figures and detailed description.
FIG. 1 is a schematic view of a conventional drilling operation according to the present invention;
FIG. 2 is a schematic view of the present invention while drilling a lower screen;
FIG. 3 is a schematic view of hole sealing extraction of the gas extraction pipe embedded in the middle of hole sealing materials of a roadway I;
FIG. 4 is a schematic diagram of hole sealing extraction of the gas extraction pipe embedded in the middle of hole sealing materials of a roadway I and a roadway II;
FIG. 5 is a schematic view of a lower screen bit of the present invention;
FIG. 6 is a schematic bottom view of FIG. 5;
in the figure: 101. a drilling machine; 102. a drill stem; 103. conventional drill bits for drilling; 104. drilling; 105. a high pressure pump station; 201. a screen pipe lower drill bit; 2011. a drill rod connection section; 2012. the teeth of the drill bit; 2013. a drill jet hole; 2014. a bit body; 2015. an end connector; 301. an adapter; 302. a screen pipe; 303. a hole sealing section; 304. a gas extraction pipe; 305. a gas extraction main pipeline; 306. and pumping a pumping station.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1-3, a method for extracting gas by using a screen pipe while drilling comprises the following steps:
the method comprises the following steps: utilizing a drilling machine 101 of a roadway I on one side of a coal seam working surface to construct a drill hole through a drill rod 102 and a drill bit 103 for conventional drilling to penetrate the working surface to a roadway II on the other side, and forming a drill hole 104;
step two: replacing a conventional drilling bit 103 into a lower sieve tube bit 201, wherein two ends of the lower sieve tube bit 201 are respectively connected with the drill rod 102 and the adapter 301, and the other end of the adapter 301 is connected with a plurality of sieve tubes 302 which are sequentially connected;
step three: the drilling machine 101 drives the lower sieve tube drill bit 201 to rotate and retreat to a roadway I, meanwhile, the lower sieve tube drill bit 201 brings a plurality of sieve tubes 302 which are sequentially connected to an orifice of a drill hole 104 of the roadway I through an adapter 301, and meanwhile, water is injected into the drill rod 102 and the lower sieve tube drill bit 201 through the high-pressure pump station 105, so that jet flow slag discharge is realized;
step four: removing the screen pipe 302 at the orifice position of the drill hole 104 of the roadway I and the roadway II, sealing the sealing sections 303 of the roadway I and the roadway II by using sealing materials, embedding a gas extraction pipe 304 in the middle of the sealing material on one side of the roadway I or the roadway II (the gas extraction pipe 304 is embedded in the middle of the sealing material on one side of the roadway I shown in FIG. 3, and the gas extraction pipe 304 is embedded in the middle of the sealing material on one side of the roadway II shown in the figure), wherein one end of the gas extraction pipe 304 extends into the screen pipe 302, the other end of the gas extraction pipe is connected with a gas extraction main pipeline 305, and the gas extraction main pipeline 305 is additionally connected with an extraction pump station 306;
step five: and repeating the first step to the fourth step to finish the multi-group extraction drilling construction and hole sealing continuous extraction of the working face.
When the distance between the working faces is long, the drilling machine 101 is a directional drilling machine, the conventional drilling bit 103 is a screw drill bit, the drill rod 102 is a directional drill rod, and the whole coal seam working face is penetrated through the construction directional drilling hole 104.
The construction mode of the drilling hole 104 can adopt water drilling to remove slag or air drilling to remove slag.
The sieve tube 302 is a sieve tube commonly used in mines, and in order to reduce the influence of the sieve tube 302 on a coal cutter in the working face extraction process, the sieve tube 302 is made of PVC, PE hard plastics, glass fiber reinforced plastics or iron pipes.
Preferably, the outer diameter of the screen 302 is designed to be smaller than the maximum outer diameter of the lower screen bit 201, since the borehole 104 is deformed after the conventional drill bit 103 is used, so that the resistance during the pull-back process is relatively small. The maximum outer diameter of the lower screen drill bit 201 is smaller than the maximum outer diameter of the conventional drill bit 103, so that no reaming is required during the third step of retraction, and the resistance of the drilling machine 101 is low.
The adapter 301 may also be replaced by a bearing with a flange (conventional structure, not shown in the drawings), and the lower screen pipe bit 201 and the screen pipe 302 are connected through the bearing with the flange to realize relative rotation; by adopting the connection mode of the bearing with the flange plate, the drill rod 102 can rotate in the retraction process without driving the sieve tube 302 to rotate, otherwise, the drill rod rotates together, and the requirement on the torque of the drilling machine is higher.
Preferably, a drilling machine (not shown) for jacking pipes can be arranged on one side of the roadway II to provide assistance for rotation and movement of the screen pipe 302 and the lower screen pipe drill bit 201.
Example 2
The difference from the embodiment 1 is that the fourth step is specifically as follows: the screen pipe 302 at the orifice position of the drill hole 104 of the roadway I and the roadway II is removed, hole sealing materials are used for sealing hole sealing sections 303 of the roadway I and the roadway II, a gas extraction pipe 304 (shown in figure 4) is embedded in the middle of the hole sealing materials on one side of the roadway I and the roadway II, one end of the gas extraction pipe 304 extends into the screen pipe 302, the other end of the gas extraction pipe is connected with a gas extraction main pipeline 305, and the gas extraction main pipeline 305 is further connected with an extraction pump station 306.
Example 3
Referring to fig. 5 to 6, the invention simultaneously provides a matched lower screen drill bit of the method for extracting gas from a lower screen while drilling in embodiments 1 and 2, which includes a drill rod connecting section 2011, drill bit gear teeth 2012, a drill bit jet hole 2013, a drill bit body 2014 and an end connector 2015; bit body 2014 sets up the end of drilling rod linkage segment 2011 it has six groups of drill bit teeth of a cogwheel 2012 to distribute on the bit body 201 there are multiunit drill bit jet hole 2013 along circumferencial direction evenly distributed on the drilling rod linkage segment 204, bit body 201 center is equipped with the through-hole bit body 201 bottom face center through-hole department downwardly extending is equipped with end connection head 2015, end connection head 2015 is annular boss structure, and is equipped with the internal thread at annular boss.
The drill rod connecting section 2011 is in a hollow cylinder shape, an internal thread is arranged at the top end of the hollow cylinder, and the drill rod 102 is connected with the lower sieve tube drill bit 201 through the internal thread of the drill rod connecting section 2011.
The bottom surface of end connection 2015 is equipped with 4 bolts for be connected with the bearing of taking the ring flange, lower screen pipe drill 201 links to each other with screen pipe 302 through the bearing of taking the ring flange and realizes relative rotation.
The drill bit jet holes 2013 are totally provided with 4 groups, every two drill bit jet holes 2013 which are vertically distributed up and down are a group, and the drill bit jet holes 2013 are used for discharging slag in a jet manner.
Preferably, a high-pressure nozzle is arranged in the drill bit jet hole 2013, and in the withdrawal process in the step three, high-pressure water is injected to realize secondary coal breaking and slag discharging of jet flow;
the invention relates to a gas extraction process method of a screen pipe while drilling and a screen pipe pushing drill bit, which are used for extracting coal by adopting a mode of drilling through a coal body and drilling a screen pipe, and solve the problems that the coal extraction is influenced by deformation and collapse after drilling construction and the screen pipe is difficult to feed in, compared with the method of drilling the screen pipe while drilling in a drill rod, the method has the advantages of no influence of the inner diameter of the drill rod and large size of the screen pipe, compared with the method of drilling the screen pipe while drilling on the same side outside the drill rod in the prior art (the screen pipe is drilled on the same side outside the drill rod while drilling, after a certain distance needs to be drilled, the drilling is stopped, the connection part of the drill pipe with an orifice is disassembled, the screen pipe penetrates through the drill rod and is connected with the screen pipe inside, the process is difficult to realize, the drill rod needs to be aligned and connected again, the drilling of the whole process and the screen pipe pushing are interfered with each other, the process is very complicated, besides, the screen pipe rubs the inner wall, the sieve tube needs to have higher wear resistance), has the advantages of low requirement on sieve tube material and simple process, and provides a means for continuous and effective extraction of gas existing in the coal body of the working face.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for extracting gas by using a screen pipe while drilling is characterized by comprising the following steps:
the method comprises the following steps: drilling a hole to penetrate through the working face to a roadway II on the other side by using a drilling machine of a roadway I on one side of the coal seam working face through a drill rod and a drill bit for conventional drilling, and forming a drilled hole;
step two: replacing a conventional drilling bit as a lower sieve tube drilling bit, wherein two ends of the lower sieve tube drilling bit are respectively connected with the drill rod and the adapter, and the other end of the adapter is connected with a plurality of sieve tubes which are sequentially connected;
step three: the drilling machine drives a lower sieve tube drill bit to rotate and retreat to a roadway I, meanwhile, the lower sieve tube drill bit brings a plurality of sieve tubes which are sequentially connected to a drilling orifice of the roadway I through an adapter, and meanwhile, water is injected into a drill rod and the lower sieve tube drill bit through a high-pressure pump station to achieve jet flow deslagging;
step four: removing the sieve tube at the drilling hole opening positions of the roadway I and the roadway II, sealing hole sealing sections of the roadway I and the roadway II by using hole sealing materials, embedding a gas extraction pipe in the middle of the hole sealing materials of the roadway I and/or the roadway II, wherein one end of the gas extraction pipe extends into the sieve tube, the other end of the gas extraction pipe is connected with a gas extraction main pipeline, and the gas extraction main pipeline is additionally connected with an extraction pump station;
step five: and repeating the first step to the fourth step to finish the multi-group extraction drilling construction and hole sealing continuous extraction of the working face.
2. The process method for gas extraction while drilling with the screen pipe as claimed in claim 1, wherein the drilling machine is a directional drilling machine, the drill bit for conventional drilling is a screw drill bit, the drill rod is a directional drill rod, and the whole coal seam working face is penetrated through construction of the directional drilling.
3. The process method for gas extraction while drilling of the screen pipe as recited in claim 1, wherein the screen pipe is made of PVC, PE rigid plastic, glass fiber reinforced plastic or iron pipe.
4. The process method for extracting gas while drilling of the lower sieve tube as recited in claim 1, wherein the outer diameter of the sieve tube is smaller than the maximum outer diameter of the lower sieve tube drill bit, and the maximum outer diameter of the lower sieve tube drill bit is smaller than the maximum outer diameter of a conventional drill bit for drilling.
5. The process method for gas extraction while drilling of the lower screen pipe as recited in claim 1, wherein the adapter can also be a bearing with a flange, and the drill bit of the lower screen pipe and the screen pipe can rotate relatively after being connected through the bearing with the flange.
6. The process method for gas extraction while drilling with the screen pipe being lowered as claimed in claim 1, wherein a drilling machine for jacking pipes is arranged on one side of the roadway II to provide assistance for rotation and movement of the screen pipe and a drill bit of the screen pipe being lowered.
7. The matched lower screen pipe drill bit of the process method for extracting the gas by drilling the lower screen pipe according to any one of the claims 1 to 6, which is characterized by comprising a drill rod connecting section, drill bit gear teeth, a drill bit jet hole, a drill bit body and an end connector; the drill bit body is arranged at the tail end of the drill rod connecting section, at least 3 groups of drill bit gear teeth are distributed on the drill bit body, a plurality of groups of drill bit jet holes are uniformly distributed on the drill rod connecting section along the circumferential direction, a downward convex end connector is arranged at the center of the bottom end face of the drill bit body, the end connector is of an annular boss structure, and an internal thread is arranged on the annular boss.
8. The matched lower sieve tube drill bit of the process method for extracting gas while drilling of the lower sieve tube of claim 7, wherein the drill rod connecting section is in the shape of a hollow cylinder, and an internal thread is arranged at the top end of the hollow cylinder.
9. The matched lower screen pipe drill bit of the while-drilling lower screen pipe gas extraction process method according to claim 7, wherein 4 bolts are arranged on the bottom surface of the end connector and used for being connected with a bearing with a flange plate.
10. The matched lower screen pipe drill bit of the while-drilling lower screen pipe gas extraction process method according to claim 7, wherein the drill bit jet holes are arranged in 4 groups, and every two drill bit jet holes vertically distributed up and down are a group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031316.3A CN113700522B (en) | 2021-09-03 | 2021-09-03 | Gas extraction process method for lower screen pipe while drilling and matched lower screen pipe drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111031316.3A CN113700522B (en) | 2021-09-03 | 2021-09-03 | Gas extraction process method for lower screen pipe while drilling and matched lower screen pipe drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113700522A true CN113700522A (en) | 2021-11-26 |
| CN113700522B CN113700522B (en) | 2023-09-22 |
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| CN202111031316.3A Active CN113700522B (en) | 2021-09-03 | 2021-09-03 | Gas extraction process method for lower screen pipe while drilling and matched lower screen pipe drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045640A (en) * | 2022-06-27 | 2022-09-13 | 中煤科工集团西安研究院有限公司 | Device and method for pulling screen pipe in opposite directions through penetrating drilled holes |
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| WO2004072434A2 (en) * | 2003-02-07 | 2004-08-26 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
| US20090107675A1 (en) * | 2007-10-03 | 2009-04-30 | Tesco Corporation | Liner Drilling and Cementing System Utilizing a Concentric Inner String |
| CN105863512A (en) * | 2016-04-13 | 2016-08-17 | 中煤科工集团西安研究院有限公司 | Coal mine underground broken soft coal seam ladder pipe-tracing compound directional drilling pore-forming device and method |
| CN108425698A (en) * | 2018-03-19 | 2018-08-21 | 中煤科工集团西安研究院有限公司 | Coal mine down-hole tunnel tunnels method for treating flour dust |
| CN214035761U (en) * | 2020-12-22 | 2021-08-24 | 山西开源益通矿业科技工程有限公司 | This coal seam large aperture gas drainage system |
-
2021
- 2021-09-03 CN CN202111031316.3A patent/CN113700522B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004072434A2 (en) * | 2003-02-07 | 2004-08-26 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
| US20090107675A1 (en) * | 2007-10-03 | 2009-04-30 | Tesco Corporation | Liner Drilling and Cementing System Utilizing a Concentric Inner String |
| CN105863512A (en) * | 2016-04-13 | 2016-08-17 | 中煤科工集团西安研究院有限公司 | Coal mine underground broken soft coal seam ladder pipe-tracing compound directional drilling pore-forming device and method |
| CN108425698A (en) * | 2018-03-19 | 2018-08-21 | 中煤科工集团西安研究院有限公司 | Coal mine down-hole tunnel tunnels method for treating flour dust |
| CN214035761U (en) * | 2020-12-22 | 2021-08-24 | 山西开源益通矿业科技工程有限公司 | This coal seam large aperture gas drainage system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045640A (en) * | 2022-06-27 | 2022-09-13 | 中煤科工集团西安研究院有限公司 | Device and method for pulling screen pipe in opposite directions through penetrating drilled holes |
| CN115045640B (en) * | 2022-06-27 | 2024-03-22 | 中煤科工集团西安研究院有限公司 | Device and method for penetrating through borehole and opposite-pulling lower screen pipe |
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| Publication number | Publication date |
|---|---|
| CN113700522B (en) | 2023-09-22 |
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