CN112943346B - Three-dimensional gas extraction mechanism for complex rock stratum - Google Patents
Three-dimensional gas extraction mechanism for complex rock stratum Download PDFInfo
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- CN112943346B CN112943346B CN202110125183.XA CN202110125183A CN112943346B CN 112943346 B CN112943346 B CN 112943346B CN 202110125183 A CN202110125183 A CN 202110125183A CN 112943346 B CN112943346 B CN 112943346B
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- extraction
- pipe
- drill bit
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention discloses a complex rock stratum gas three-dimensional extraction mechanism, which comprises: the auxiliary drill bit is arranged at one end of the extraction pipe, and the fixed pipe is arranged at the other end of the extraction pipe; the extraction pipe comprises an extraction head, connecting pipes and extraction cavities, a plurality of connecting pipes are arranged in the extraction pipe, the connecting pipes divide the extraction pipe to form a plurality of extraction cavities, furthermore, the auxiliary drill bit comprises a driving drill bit and a hole expanding drill bit, the driving drill bit is installed at one end of the extraction pipe, the hole expanding drill bit is installed between the driving drill bit and the extraction pipe, the hole expanding drill bit is of a structure with a narrow side and a wide side in the cross section, and one end of the hole expanding drill bit, close to the driving drill bit, is a narrow part.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to a complex rock stratum gas three-dimensional extraction mechanism.
Background
For the gas in the coal seam, after the gas is extracted to a certain degree, the content of the gas in the coal seam is reduced, if the high power is reused for concentrated extraction, a great deal of resources are wasted, and if the power is only reduced, namely the extraction power is simply controlled according to the gas concentration, the gas is difficult to extract at low power.
Along with the situation that coal mine gas disaster accidents are severe day by day, the coal bed geological environment has great influence on the directional drilling technology, and the coal bed geological conditions in China are complex, the complex rock stratum gas three-dimensional extraction mechanism is provided, and is wider in coverage range and stable in extraction effect compared with a common gas extraction device.
Disclosure of Invention
In order to solve the problems, the invention provides a complex rock stratum gas three-dimensional extraction mechanism which is characterized by comprising the following components: the auxiliary drill bit is arranged at one end of the extraction pipe, and the fixed pipe is arranged at the other end of the extraction pipe; the extraction pipe comprises an extraction head, connecting pipes and an extraction cavity, a plurality of connecting pipes are arranged in the extraction pipe and divide the extraction pipe to form a plurality of extraction cavities,
further, preferably, the auxiliary drill bit comprises a driving drill bit and a hole expanding drill bit, wherein the driving drill bit is installed at one end of the extraction pipe, the hole expanding drill bit is installed between the driving drill bit and the extraction pipe, the hole expanding drill bit is of a structure with a section which is narrow at one side and wide at the other side, and one end of the hole expanding drill bit, close to the driving drill bit, is a narrow part.
Further, preferably, the fixed pipe comprises a plugging block arranged between the fixed pipe and the extraction pipe.
Further, preferably, the fixed pipe further comprises a conveying pipeline, wherein the conveying pipeline penetrates through the inside of the fixed pipe to be connected with the extraction pipe.
Further, preferably, the extraction heads are distributed on the outer wall of the extraction pipe and comprise a fixing part, a collection head, a lifting and contracting rod and a gas pipe, wherein one end of the fixing part is installed on the side wall of the extraction pipe, and the other end of the fixing part is connected with the collection head through the gas pipe; the fixing part is provided with a telescopic rod on two sides of the gas conveying pipe, the bottom of the telescopic rod is arranged on the surface of the fixing part, and a piston rod of the telescopic rod is fixed on the side wall of the collecting head.
Further, as an optimization, one end of the gas pipe is connected with the collecting head, the other end of the gas pipe is connected with the fixing part, the extraction head further comprises an installation block, the installation block is embedded into the groove of the fixing part, a motor is installed in the installation block, and a blade is installed on a rotating shaft of the motor; meanwhile, the mounting block is provided with a channel.
Preferably, a sleeve is arranged outside the telescopic rod and between the fixing part and the collecting head, the sleeve is sleeved outside the telescopic rod, and the sleeve and the gas conveying pipe are made of elastic materials.
Compared with the prior art, the invention has the beneficial effects that:
according to the determination of the gas concentration of the coal bed, drilling and extraction are carried out at a proper position, the auxiliary drill bit is arranged to facilitate the extraction mechanism to go deep into the coal bed, the telescopic extraction head is arranged, and the telescopic extraction head is controlled by the telescopic rod to extend into the coal bed with high gas content for extraction, so that the gas acquisition efficiency is improved;
in order to improve the extraction efficiency, the tail end of the gas transmission pipe is provided with a blade driven by a motor, the blade rotates to form negative pressure, and the extraction efficiency is increased through the negative pressure.
Drawings
FIG. 1 is a schematic structural diagram of a three-dimensional gas extraction mechanism for a complex rock stratum
FIG. 2 is a schematic structural diagram of a complex rock stratum gas three-dimensional extraction mechanism;
FIG. 3 is a schematic structural diagram of a complex rock stratum gas three-dimensional extraction mechanism;
FIG. 4 is a schematic view of a construction of a drainage head;
reference numerals: 10-extracting pipe; 11-extraction head; 1101-a fixed part; 1102-pick heads; 1103-a telescopic rod; 1104-a mounting block; 1105-a blade; 1106-electric machine; 1107-a channel; 1108-gas conveying pipe; 1109-sleeve; 12-a connecting tube; 13-pumping out the cavity; 20-an auxiliary drill bit; 21-a drive-in bit; 22-a reamer bit; 30-a fixed tube; 31-a blocking block; 32-a delivery line; 4-coal seam.
Detailed Description
The invention provides a complex rock stratum gas three-dimensional extraction mechanism which is characterized by comprising the following components: the device comprises an extraction pipe 10, an auxiliary drill bit 20 and a fixed pipe 30, wherein the auxiliary drill bit 20 is installed at one end of the extraction pipe 10, and the fixed pipe 30 is installed at the other end of the extraction pipe; the extraction pipe 10 comprises an extraction head 11, connecting pipes 12 and extraction cavities 13, a plurality of connecting pipes 12 are arranged in the extraction pipe 10, the connecting pipes 12 separate the inner pipe of the extraction pipe 10 to form a plurality of extraction cavities 13,
the auxiliary drill bit 20 comprises a driving drill bit 21 and a hole expanding drill bit 22, wherein the driving drill bit 21 is installed at one end of the extraction pipe 10, the hole expanding drill bit 22 is installed between the driving drill bit 21 and the extraction pipe 10, the hole expanding drill bit 22 is of a structure with a narrow side and a wide side, and one end, close to the driving drill bit 21, of the hole expanding drill bit is a narrow part.
The fixed pipe 30 comprises a plugging block 31 arranged between the fixed pipe 30 and the extraction pipe 10, an extraction channel is plugged by the plugging block, and gas is dispersed to a working space to cause an accident.
The fixed pipe 30 further comprises a conveying pipeline 32, wherein the conveying pipeline 32 penetrates through the inside of the fixed pipe 30 to be connected with the extraction pipe 10, and gas is conveyed through the conveying pipeline and conveyed to a designated storage container.
The extraction heads 11 are distributed on the outer wall of the extraction pipe 10, each extraction head 11 comprises a fixing part 1101, a collection head 1102, a telescopic rod 1103 and an air conveying pipe 1108, one end of each fixing part 1101 is installed on the side wall of the extraction pipe 10, and the other end of each fixing part 1101 is connected with the collection head 1102 through the air conveying pipe 1108; two sides of the gas conveying pipe 1108 are provided with lifting rods 1103 on the fixing portion 1101, the bottoms of the lifting rods 1103 are installed on the surface of the fixing portion 1101, piston rods of the lifting rods 1103 are fixed on the side wall of the collecting head 1102, and the collecting head extends into a coal seam with high gas content for extraction through the telescopic extraction head and the lifting rod control, so that the gas collection efficiency is improved.
One end of the gas transmission pipe 1108 is connected with the collecting head 1102, the other end of the gas transmission pipe 1108 is connected with the fixing part 1101, the extraction head 11 further comprises an installation block 1104, the installation block 1104 is embedded into a groove of the fixing part 1101, a motor 1106 is installed inside the installation block 1104, and blades 1105 are installed on the rotating shaft of the motor 1106; meanwhile, the mounting block 1104 is provided with a channel 1107 which is provided with a blade driven by a motor, the blade rotates to form negative pressure, and the extraction efficiency is increased by the negative pressure.
Outside the telescopic rod 1103, be equipped with sleeve 1109 between fixed part 1101 and the collection head 1102, the telescopic rod 1103 outside is located to the sleeve 1109 cover, and wherein, sleeve 1109, gas-supply pipe 1108 are made for elastic material, set up like this, can be so that telescopic rod when flexible, sleeve, gas-supply pipe simultaneous extension shorten.
In the specific implementation, the complex rock stratum gas three-dimensional extraction mechanism,
according to the distribution characteristics of the overlying rock fracture field of the goaf of the working face of the complex rock and the migration rule of the pressure-relief gas, the hole distribution parameters of the high-position near-horizontal directional long drill hole of the goaf of the working face of the complex rock for three-dimensional extraction of the pressure-relief gas of the overlying rock are determined.
Drilling the coal seam according to the measured gas content of the coal seam, extending an extraction mechanism into the drilled hole of the coal seam, and extracting gas:
the extraction drill hole is further enlarged through an auxiliary drill bit and then is smoothly connected into an extraction pipe, a plugging block is plugged at the opening of the drill hole, then, the blades in the extraction head are driven by a motor to rotate to form negative pressure, gas enters the gas pipe through a plurality of inlets of the extraction head and enters an extraction cavity through the gas pipe, the gas in the extraction cavity is continuously collected, and the gas is extracted into a container for storing the gas through a conveying pipeline by an air extractor arranged outside.
When the gas near the extraction head is extracted to a certain degree, the acquisition head is pushed to a far position through the telescopic rod, and the second round of extraction is carried out.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. Complicated rock stratum gas three-dimensional drainage mechanism, characterized by includes: the device comprises an extraction pipe (10), an auxiliary drill bit (20) and a fixed pipe (30), wherein the auxiliary drill bit (20) is installed at one end of the extraction pipe (10), and the fixed pipe (30) is installed at the other end of the extraction pipe; the extraction pipe (10) comprises an extraction head (11), connecting pipes (12) and extraction cavities (13), wherein the connecting pipes (12) are arranged in the extraction pipe (10), and the connecting pipes (12) separate the inner pipes of the extraction pipe (10) to form the extraction cavities (13); the extraction heads (11) are distributed on the outer wall of the extraction pipe (10),
the extraction head (11) comprises a fixing part (1101), a collection head (1102), a lifting and contracting rod (1103) and an air conveying pipe (1108), one end of the fixing part (1101) is installed on the side wall of the extraction pipe (10), and the other end of the fixing part is connected with the collection head (1102) through the air conveying pipe (1108);
lifting and contracting rods (1103) are arranged on the two sides of the gas conveying pipe (1108), the bottom of each lifting and contracting rod (1103) is installed on the surface of the corresponding fixing part (1101), and a piston rod of each lifting and contracting rod (1103) is fixed to the side wall of the corresponding collecting head (1102); one end of the gas pipe (1108) is connected with the collecting head (1102), the other end is connected with the fixing part (1101), the extraction head (11) also comprises an installation block (1104), the installation block (1104) is embedded into the groove of the fixing part (1101),
a motor (1106) is installed in the installation block (1104), and a blade (1105) is installed on the rotating shaft of the motor (1106);
meanwhile, the mounting block (1104) is provided with a channel (1107).
2. The three-dimensional complex rock stratum gas extraction mechanism according to claim 1, wherein the auxiliary drill bit (20) comprises a driving drill bit (21) and a hole expanding drill bit (22), the driving drill bit (21) is installed at one end of the extraction pipe (10), the hole expanding drill bit (22) is installed between the driving drill bit (21) and the extraction pipe (10), the hole expanding drill bit (22) is of a structure with a section being one narrow side and one wide side, and one end of the hole expanding drill bit (22) close to the driving drill bit (21) is a narrow part.
3. The complex rock stratum gas stereoscopic extraction mechanism according to claim 1, wherein the fixed pipe (30) comprises a plugging block (31) arranged between the fixed pipe (30) and the extraction pipe (10).
4. The complex rock stratum gas stereoscopic extraction mechanism is characterized in that the fixed pipe (30) further comprises a conveying pipeline (32), wherein the conveying pipeline (32) penetrates through the inside of the fixed pipe (30) and is connected with the extraction pipe (10).
5. The complex rock stratum gas stereoscopic extraction mechanism as claimed in claim 1, wherein a sleeve (1109) is arranged outside the telescopic rod (1103) between the fixing portion (1101) and the collecting head (1102), the sleeve (1109) is sleeved outside the telescopic rod (1103),
wherein, the sleeve (1109) and the air pipe (1108) are made of elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125183.XA CN112943346B (en) | 2021-01-29 | 2021-01-29 | Three-dimensional gas extraction mechanism for complex rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125183.XA CN112943346B (en) | 2021-01-29 | 2021-01-29 | Three-dimensional gas extraction mechanism for complex rock stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112943346A CN112943346A (en) | 2021-06-11 |
| CN112943346B true CN112943346B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110125183.XA Active CN112943346B (en) | 2021-01-29 | 2021-01-29 | Three-dimensional gas extraction mechanism for complex rock stratum |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978172A (en) * | 1989-10-26 | 1990-12-18 | Resource Enterprises, Inc. | Gob methane drainage system |
| CN102134965B (en) * | 2011-01-25 | 2012-01-18 | 煤炭科学研究总院西安研究院 | Long positioned drill hole drilling tool for extracting gas from coal seam roof and construction method thereof |
| CN108868740B (en) * | 2018-04-28 | 2021-09-14 | 中国矿业大学 | Cave pressure relief mining simulation test method for tectonic coal in-situ coal bed gas horizontal well |
| CN109113786B (en) * | 2018-10-12 | 2023-09-08 | 安徽理工大学 | Gas extraction device capable of withdrawing drill rod |
| CN210217827U (en) * | 2019-07-27 | 2020-03-31 | 山西实瑞达管业有限公司 | Auxiliary device for inserting drilling extraction pipeline |
| CN211422602U (en) * | 2019-11-22 | 2020-09-04 | 谢明慧 | Underground gas extraction device with higher safety factor |
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2021
- 2021-01-29 CN CN202110125183.XA patent/CN112943346B/en active Active
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| CN112943346A (en) | 2021-06-11 |
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