CN111006900A - Drilling and fixed-point sampling device for coal seam gas content testing and coal seam sampling method - Google Patents

Drilling and fixed-point sampling device for coal seam gas content testing and coal seam sampling method Download PDF

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Publication number
CN111006900A
CN111006900A CN201911353006.6A CN201911353006A CN111006900A CN 111006900 A CN111006900 A CN 111006900A CN 201911353006 A CN201911353006 A CN 201911353006A CN 111006900 A CN111006900 A CN 111006900A
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China
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sampling
drilling
sampling device
coal seam
gas content
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CN201911353006.6A
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CN111006900B (en
Inventor
李全贵
胡千庭
宋明洋
梁运培
邹全乐
闫发志
姜志忠
胡良平
张跃兵
刘乐
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Chongqing University
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Chongqing University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/04Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit

Abstract

The invention discloses a drilling fixed-point sampling device and a sampling method for coal seam gas content testing, wherein the sampling device comprises a pipe barrel 1, the front end and the rear end of the outer wall of the pipe barrel 1 are provided with connecting threads, the root part of each connecting thread is fixedly provided with a magnetic stop block 2 and a stop block 9 in a sealed manner, a pipe section between the magnetic stop block 2 and the stop block 9 is sleeved with a sliding sleeve assembly, the tail part of the sliding sleeve assembly is hermetically bonded with the stop block 9, the hollow part of the inner wall of the pipe barrel 1 is provided with a sampling cavity 7, and the pipe wall is provided with an orifice 3. The sampling method comprises the following steps: 1. installing a sampling device; 2. testing drilling of the drill hole; 3. sealing and sampling; 4. and (4) carrying out field desorption. The invention has the technical effects that: in the process of drilling, samples are directly collected at fixed points and are sealed, so that the gas is prevented from being greatly dissipated and lost, and the accuracy of testing the gas content of the coal bed gas is improved.

Description

Drilling and fixed-point sampling device for coal seam gas content testing and coal seam sampling method
Technical Field
The invention belongs to the technical field of coal mine safety, and particularly relates to a drilling fixed-point sampling device and a coal seam sampling method for coal seam gas content testing.
Background
The coal bed gas content is a basic parameter for mine gas extraction design and disaster forecast prediction, along with the gradual increase of coal mining depth in China, gas disasters seriously threaten the safety of coal mine workers, and the accurate measurement of the coal bed gas content can ensure the safety production of coal mines and the life safety of the coal mine workers; the gas coal seam extraction effect directly influences the accuracy of coal seam gas content determination, the long drill holes are used for pre-extraction, the extraction control area and the extraction range are obviously increased, but the gas content sampling test at the hole bottom positions of the long drill holes has larger errors, so that the mine extraction design and evaluation are seriously influenced.
The current devices and methods for sampling and testing the gas content of the coal sample at the bottom of the long drill hole by using a direct method are divided into two types: firstly, open sampling, such as directly drilling a coal bed core for sampling by a single-layer core tube and the like, wherein the sampling device and the sampling method have larger calculated gas content error due to overlong drill withdrawal and drill change time; and secondly, closed sampling is carried out, and coring and sealing operations are completed by using a complicated double-layer or multi-layer sleeve mechanical structure.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a drilling fixed-point sampling device for testing the coal seam gas content, which can realize fixed-point sampling in the drilling process of a drilled hole, avoid gas loss during drilling change and improve the accuracy of the measurement of the coal seam gas content of a mine. The invention also provides a coal seam sampling method using the sampling device.
In order to solve the technical problems:
the invention provides a drilling fixed-point sampling device for testing coal bed gas content, which comprises a pipe barrel, wherein the front end and the rear end of the outer wall of the pipe barrel are provided with connecting threads, the root of the connecting thread at the front end is fixedly provided with a magnetic stop block, the root of the connecting thread at the rear end is fixedly provided with a stop block, a pipe section between the magnetic stop block and the stop block is sleeved with a sliding sleeve assembly, the tail part of the sliding sleeve assembly is hermetically bonded with the stop block, a sampling cavity is arranged at the hollow part of the inner wall of the pipe barrel, the pipe wall of the sampling cavity is provided with an orifice, and the orifice is positioned on a.
The invention provides a coal seam sampling method using the sampling device, which comprises the following steps:
step 1, installing a sampling device: connecting the sampling device with a drill bit through a front-end connecting thread, connecting the front end with a first drill rod through the front-end connecting thread, and then starting drilling;
step 2, testing drilling: the drilling rod is supplied with air or water in a positive production mode, water or air with pressure sequentially passes through the drilling rod, the two one-way valves and the orifice of the sampling cavity, and coal rock stratum fragments drilled by the drill bit are flushed out of the drilled hole;
step 3, sealed sampling: the drill bit drives the sampling device to drill to reach a specified sampling position, air or water supply is stopped during sampling, the drilling is continuously rotated, so that the accumulated coal sample is filled into the sampling cavity, the drill rod is pulled out, the blocking rod is buckled on the wall of a drill hole to push the connecting sheet forwards, the iron ring sheet pulls the sleeve to move forwards to pass through an orifice of the sampling cavity, and the magnetic block pulls the iron ring sheet to seal the sampling cavity;
and 4, after sampling is finished, pulling out the drill rod, dismounting the sampling device, and connecting the underground desorption instrument to carry out field desorption.
Compared with the prior art, the invention has the following technical effects:
the coal sample collection device is simple and convenient to use, can directly collect samples at fixed points in the drilling process, is easy to match and connect with a drill rod and a drill bit, has the advantage of accurate sampling, can collect sufficient coal samples at the bottom of a hole through rotation, seals the coal samples in the sampling cavity under the mechanical action, can avoid large-scale dissipation and loss of gas, and improves the accuracy of testing the gas content of coal bed gas.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the sliding sleeve assembly;
FIG. 3 is a left side view of the sliding sleeve assembly;
FIG. 4 is a schematic diagram of borehole drilling;
FIG. 5 is a view of the sampling seal configuration of the present invention.
In the figure, 1, a tube; 2. a magnetic stopper; 3. an orifice; 4. a spring plate; 5. a gear lever; 6. a plastic folding cylinder; 7. a sampling cavity; 81. the front end is connected with a thread; 82. the rear end is connected with a thread; 9. a blocking block; 10. a one-way valve; 11. a rubber pad; 12. a joint shaft; 13. a sheet of iron rings; 14. a seal ring; 15. a sleeve; 16. a drill bit; 17. coal sample; 18. a first drill pipe.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in the present application, for the sake of clarity of description of the connection and position relationship of the components, the terms "front" and "rear" are used, where "front" refers to a position close to the drill bit, and "rear" refers to a position away from the drill bit and close to the drill rod.
As shown in figure 1, the invention comprises a pipe barrel 1, connecting threads are arranged at the front end and the rear end of the outer wall of the pipe barrel 1, a magnetic stop block 2 is fixedly arranged at the root of the connecting thread 81 at the front end, a stop block 9 is fixedly arranged at the root of the connecting thread 82 at the rear end, a sliding sleeve assembly is sleeved on a pipe section between the magnetic stop block 2 and the stop block 9, the tail part of the sliding sleeve assembly is hermetically bonded with the stop block 9, a sampling cavity 7 is arranged at the hollow part of the inner wall of the pipe barrel 1, an orifice 3 is arranged on the pipe wall of the sampling cavity 7, and the orifice 3 is positioned on a sliding section in. The front connecting thread 81 is used for connecting a drill bit, the rear connecting thread 82 is used for connecting a drill rod, and the sliding sleeve component is used for opening or closing the opening of the sampling cavity 7.
The sampling cavity 7 is a cavity formed by sealing two ends of a pipeline, and two end walls are respectively provided with a one-way valve 10.
As shown in fig. 2 and 3, the sliding sleeve assembly includes a sleeve 15, a plastic folding cylinder 6, a blocking rod 5 and an iron ring 13, the front end of the sleeve 15 is connected to the iron ring 13, the rear end of the sleeve is connected to the plastic folding cylinder 6, one end of the blocking rod 5 is connected to the iron ring 13 through a joint shaft 12, the blocking rod can rotate around the joint shaft, a semicircular elastic sheet 4 is embedded on the outer wall of the sleeve 15 close to the iron ring 13, the arc surface of the elastic sheet 4 supports the lower rod of the blocking rod 5, and the blocking rod extends outwards under the supporting of the elastic sheet.
4 gear rods are uniformly distributed on the gear rod 5 along the periphery of the sleeve 15; the sleeve 15 is a metal rubber composite pipe, the outer layer is metal, and the inner layer is rubber, so that the hole seam can be sealed conveniently.
As shown in fig. 1, a rubber pad 11 is attached to the side of the magnetic stopper 2 facing the sliding sleeve assembly, a groove is formed in the outer wall of the pipe barrel close to the magnetic stopper 2, a sealing ring 14 is embedded in the groove, and the iron ring piece 13 is pushed by the stopper rod to slide with the suction force of the magnetic stopper 2, can pass through the orifice 3 and the sealing ring 14 to extrude the rubber pad 11, and seals the sampling cavity 7. The orifice 3 is an elliptical hole.
The invention is a double-layer sleeve structure, and the sliding sleeve component slides relatively on the outer tube of the sampling cavity 7; in the sampling process, the drill bit drives the sampling device to reach a designated sampling position, air or water supply is stopped, the sampling device continues to rotate to enable the accumulated coal sample to be filled into the sampling cavity, the drill rod is pulled out, the blocking rod buckles the wall of the drill hole to push the sliding sleeve assembly forwards, and the magnetic stop block 2 attracts the iron ring piece 13 to enable the sampling cavity to be sealed; after sampling is finished, the underground desorption instrument is connected to carry out on-site desorption.
The coal seam sampling method using the sampling device comprises the following steps:
step 1, installing a sampling device: connecting the sampling device with a drill bit 16 through a front end connecting thread, connecting a first drill rod 18 through a rear end connecting thread, and then starting drilling;
step 2, testing drilling: as shown in fig. 4, the drill rod is supplied with air or water in positive production, and the water or air with pressure passes through the drill rod, the two one-way valves and the orifice of the sampling cavity in sequence to flush out the coal rock layer fragments drilled by the drill bit from the drill hole;
step 3, sealed sampling: the drill bit drives the sampling device to drill to reach a specified sampling position, in the sampling process, air or water supply is stopped, the drill rod is continuously rotated, the drill rod is drilled for 10cm, the piled coal sample 17 is poured into the sampling cavity, the drill rod is pulled out, the stop rod is buckled on the wall of the drill hole to push the connecting sheet forward, the iron ring sheet 13 pulls the sleeve 15 forward to pass through the orifice of the sampling cavity, and as shown in figure 5, the magnetic stop block 2 pulls the iron ring sheet 13 to seal the sampling cavity 7;
and 4, after sampling is finished, pulling out the drill rod, dismounting the sampling device, and connecting the underground desorption instrument to carry out field desorption.

Claims (6)

1. A drilling fixed-point sampling device for testing coal bed gas content comprises a pipe barrel (1) and is characterized in that: the front end and the rear end of the outer wall of the pipe barrel (1) are provided with connecting threads, the root of the front-end connecting thread (81) is fixedly provided with a magnetic stop block (2), the root of the rear-end connecting thread (82) is fixedly provided with a blocking block (9), a pipe section between the magnetic stop block (2) and the blocking block (9) is sleeved with a sliding sleeve assembly, the tail of the sliding sleeve assembly is hermetically bonded with the blocking block (9), the hollow part of the inner wall of the pipe barrel (1) is provided with a sampling cavity (7), the pipe wall of the sampling cavity (7) is provided with a hole opening (3), and the hole opening (3) is positioned on the sliding section in front of the sliding.
2. The drilling and spot sampling device for coal seam gas content testing of claim 1, wherein: two end walls of the sampling cavity (7) are respectively provided with a one-way valve (10).
3. The coal seam gas content testing, drilling and spot sampling device of claim 2, wherein: the sliding sleeve component comprises a sleeve (15), a plastic folding cylinder (6), a blocking rod (5) and an iron ring piece (13), the front end of the sleeve (15) is connected with the iron ring piece (13), the tail end of the sleeve is connected with the plastic folding cylinder (6), one end of the blocking rod (5) is connected onto the iron ring piece (13) through a joint shaft (12), a semicircular elastic sheet (4) is embedded on the outer wall of the sleeve (15) close to the iron ring piece (13), the cambered surface of the elastic sheet (4) supports the lower section rod of the blocking rod (5), and the blocking rod extends outwards under the elastic sheet support.
4. The coal seam gas content testing, drilling and spot sampling device of claim 3, wherein: 4 gear rods (5) are uniformly distributed along the periphery of the sleeve (15); the sleeve (15) is a metal rubber composite pipe, the outer layer is metal, and the inner layer is rubber.
5. The coal seam gas content testing, drilling and spot sampling device of claim 4, wherein: the side of the magnetic stop block (2) facing the sliding sleeve component is pasted with a rubber pad (11), the outer wall of the pipe barrel close to the magnetic stop block (2) is provided with a groove, and a sealing ring (14) is embedded in the groove.
6. A method of sampling a coal seam using the apparatus for drilling a spot sample for gas content testing of a coal seam according to any one of claims 1 to 5, comprising the steps of:
step 1, installing a sampling device: connecting a sampling device with a drill bit through a front-end connecting thread, connecting the front end connecting thread with a first drill rod, and then starting drilling;
step 2, testing drilling: the drilling rod is supplied with air or water in a positive production mode, water or air with pressure sequentially passes through the drilling rod, the two one-way valves and the orifice of the sampling cavity, and coal rock stratum fragments drilled by the drill bit are flushed out of the drilled hole;
step 3, sealed sampling: the drill bit drives the sampling device to drill to reach a specified sampling position, air or water supply is stopped during sampling, the drilling is continuously rotated, so that the accumulated coal sample is filled into the sampling cavity, the drill rod is pulled out, the blocking rod is buckled on the wall of a drill hole to push the connecting sheet forwards, the iron ring sheet pulls the sleeve to move forwards to pass through an orifice of the sampling cavity, and the magnetic block pulls the iron ring sheet to seal the sampling cavity;
and 4, after sampling is finished, pulling out the drill rod, dismounting the sampling device, and connecting the underground desorption instrument to carry out field desorption.
CN201911353006.6A 2019-12-25 2019-12-25 Drilling and fixed-point sampling device for coal seam gas content testing and coal seam sampling method Active CN111006900B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112362371A (en) * 2020-10-30 2021-02-12 山西晋煤集团技术研究院有限责任公司 Method for verifying reliability of gas content determination by long-distance closed coring process
CN112924223A (en) * 2021-03-25 2021-06-08 中国矿业大学 Drilling-sampling integrated device for fixed-point closed sampling of coal seam

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407019A (en) * 1993-09-24 1995-04-18 Venture Probe, Inc. Apparatus and method for environmental surveying for contaminants in alluvial materials and bedrock formations
CN200968911Y (en) * 2006-10-10 2007-10-31 山西新临钢钢铁有限公司 Casing tube air-proof coal fines sampling device
CN102103041A (en) * 2011-01-10 2011-06-22 河南理工大学 On-site sealed sampling device for coal bed gas
CN103115797A (en) * 2013-02-28 2013-05-22 中国矿业大学 Coal mine sealing and sampling device and application method thereof
RU2526962C1 (en) * 2013-06-18 2014-08-27 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук, ИУ СО РАН Method of determining gas kinetic characteristics of coal-bed
CN206458499U (en) * 2017-01-09 2017-09-01 史买林 Colliery extraction borehole sleeve pipe suspended and fixed device
CN206540716U (en) * 2017-03-02 2017-10-03 山西省地质矿产研究院 Gas content fixed point sampling device
CN207439763U (en) * 2017-11-28 2018-06-01 徐州市苏文机械设备制造有限公司 A kind of colliery coal-bed gas sample acquisitions device
CN109238768A (en) * 2018-08-24 2019-01-18 北京中联环建设工程管理有限公司 A kind of sampling system of project supervision
CN209182065U (en) * 2018-12-06 2019-07-30 郑州嵘昌集团实业有限公司 A kind of drilling coal sample sampler
CN209416755U (en) * 2018-12-17 2019-09-20 煤科集团沈阳研究院有限公司 One kind can closed device for fixed point sampling of coal bed
CN209673424U (en) * 2019-01-17 2019-11-22 安徽康达检测技术有限公司 A kind of solid particle sealed sampling device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407019A (en) * 1993-09-24 1995-04-18 Venture Probe, Inc. Apparatus and method for environmental surveying for contaminants in alluvial materials and bedrock formations
CN200968911Y (en) * 2006-10-10 2007-10-31 山西新临钢钢铁有限公司 Casing tube air-proof coal fines sampling device
CN102103041A (en) * 2011-01-10 2011-06-22 河南理工大学 On-site sealed sampling device for coal bed gas
CN103115797A (en) * 2013-02-28 2013-05-22 中国矿业大学 Coal mine sealing and sampling device and application method thereof
RU2526962C1 (en) * 2013-06-18 2014-08-27 Федеральное государственное бюджетное учреждение науки Институт угля Сибирского отделения Российской академии наук, ИУ СО РАН Method of determining gas kinetic characteristics of coal-bed
CN206458499U (en) * 2017-01-09 2017-09-01 史买林 Colliery extraction borehole sleeve pipe suspended and fixed device
CN206540716U (en) * 2017-03-02 2017-10-03 山西省地质矿产研究院 Gas content fixed point sampling device
CN207439763U (en) * 2017-11-28 2018-06-01 徐州市苏文机械设备制造有限公司 A kind of colliery coal-bed gas sample acquisitions device
CN109238768A (en) * 2018-08-24 2019-01-18 北京中联环建设工程管理有限公司 A kind of sampling system of project supervision
CN209182065U (en) * 2018-12-06 2019-07-30 郑州嵘昌集团实业有限公司 A kind of drilling coal sample sampler
CN209416755U (en) * 2018-12-17 2019-09-20 煤科集团沈阳研究院有限公司 One kind can closed device for fixed point sampling of coal bed
CN209673424U (en) * 2019-01-17 2019-11-22 安徽康达检测技术有限公司 A kind of solid particle sealed sampling device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张宏图 等: "煤层瓦斯含量测定定点取样方法研究进展", 《中国安全生产科学技术》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112362371A (en) * 2020-10-30 2021-02-12 山西晋煤集团技术研究院有限责任公司 Method for verifying reliability of gas content determination by long-distance closed coring process
CN112924223A (en) * 2021-03-25 2021-06-08 中国矿业大学 Drilling-sampling integrated device for fixed-point closed sampling of coal seam

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