CN111122238A - While-drilling fixed-point airtight sampling device and sampling method - Google Patents
While-drilling fixed-point airtight sampling device and sampling method Download PDFInfo
- Publication number
- CN111122238A CN111122238A CN202010122004.2A CN202010122004A CN111122238A CN 111122238 A CN111122238 A CN 111122238A CN 202010122004 A CN202010122004 A CN 202010122004A CN 111122238 A CN111122238 A CN 111122238A
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- core
- coring
- barrel
- ball valve
- sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/10—Formed core retaining or severing means
Abstract
The invention discloses a fixed-point airtight sampling device while drilling and a sampling method, the device comprises an outer coring barrel and a PDC opening and closing drill bit, a lower sealing device, an inner coring barrel and a middle coring barrel are sequentially sleeved in the outer coring barrel, one end of the lower sealing device is sleeved in the inner coring barrel, a desorption port is arranged in the middle of the lower sealing device, a hollow hexagon socket head cap screw is arranged in the desorption port, a rubber pad is arranged on one side of the hollow hexagon socket head cap screw, a stopping cavity is also integrally formed on the lower sealing device, a ball valve and a ball valve switch are arranged in the middle coring barrel, a ball valve sealing pad is arranged between the ball valve and the inner coring barrel, the lower sealing device is sleeved in the inner coring barrel, a fluted disc is arranged on: 1. installing a coring outer barrel; 2. coring a coal sample; 3. sealing the coal sample; the invention is convenient to disassemble and maintain, is very convenient to match and connect with various drilling machines, drilling tools, emulsion pumps, gas desorption instruments and other equipment, and is simple to operate in the coring process.
Description
Technical Field
The invention relates to the technical field of coal mine sampling, in particular to a fixed-point airtight sampling device while drilling and a sampling method.
Background
The gas disaster is one of the most main disasters of high gas mines and coal and gas outburst mines, and is also one of the main bottlenecks restricting the production of the gas disaster. The coal bed gas content is an important basic parameter in related fields such as mine gas disaster prevention and control, coal bed gas pre-drainage effect evaluation, coal bed gas resource evaluation and development and the like. Especially, the effect test after the coal seam gas is pre-extracted is highlighted, the gas content of the coal seam is relatively accurately and reliably measured, and the method is an important basis for realizing safe excavation on a working face. With the implementation of comprehensive outburst prevention measures of 'two four-in-one' and the increasing maturity of construction equipment and technology of kilometer directional drilling machines, directional long drilling large-area pre-extraction coal seam gas becomes an effective regional gas treatment technical approach. However, the deep hole sampling equipment and the technical research adapted to the deep hole sampling equipment become the main technical bottleneck for the popularization and the application of the technical measures for the area treatment.
The method has the advantages that ① drilling cutting sampling method is simple to operate and rapid to sample, but the biggest defect is that the obtained coal sample is low in purity, serious in sample mixing phenomenon and broken in coal sample, ② casing sampling method can really achieve fixed-point sampling, but the sampling time is far longer than (GB/T23250) 2009 regulation that the sampling time is not more than 5 min in the coal bed gas content underground direct measurement method, coal sample gas continuously escapes for a long time in the drill withdrawal process, loss amount is difficult to accurately calculate, ③ air pressure sampling method is only suitable for short-hole (within 100 m) rapid fixed-point sampling, negative pressure generated by compressed air injection is low when the coal bed gas content underground direct measurement method is deep in drilling, the coal sample is not enough to be taken out, the gas loss amount calculation method is complex due to the change of the coal sample desorption environment pressure in the sampling process, the ④ sealing sampling method can achieve sealed collection of the coal sample, but the existing sealing operation of the coal bed has the advantages of being low negative pressure injection, being injected by the fixed-point injection, the coal sample extraction method is not enough to be suitable for calculating the coal sample loss amount, the coal sample, the secondary drilling process is suitable for improving the research and development of the coal sample drilling process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the while-drilling fixed-point closed sampling device which can effectively improve the accuracy of measuring the gas content in the coal seam of the drilled hole.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a along with boring airtight sampling device of fixed point, includes coring outer tube, the PDC switching drill bit that passes through threaded connection with coring outer tube end, set up a plurality of stop gear on coring outer tube outer wall, stop gear includes spacing hole, spacing downthehole spacing pin that is equipped with, it is equipped with down sealing device, coring inner tube and coring well section of thick bamboo to overlap in proper order in the coring outer tube, a lower sealing device pot head is established in coring inner tube, be equipped with desorption mouth in the middle of the lower sealing device, be equipped with cavity hexagon socket head cap screw in the desorption mouth, cavity hexagon socket head cap screw one side is equipped with the rubber pad, the rubber pad is located the desorption mouth, still integrated into one piece has the capable chamber of ending on the sealing device down, the capable intracavity of; get and be provided with ball valve and ball valve switch in the core well section of thick bamboo, the ball valve with get and be provided with the ball valve between the core inner tube and seal up, the sealed cover is established in getting the core inner tube down, ball valve switch edge is provided with the fluted disc.
Further, a sealing ring is arranged between the outer ring of the lower sealing device and the inner ring of the coring inner cylinder.
Furthermore, a plurality of groups of fixing bolts are arranged between the coring outer cylinder and the coring middle cylinder.
Furthermore, a long circular tooth groove is arranged at the ball valve switch part and meshed with a fluted disc of the ball valve switch, and a plurality of flow guide grooves are axially arranged on the outer side cylinder wall of the coring middle cylinder.
Furthermore, the limiting mechanisms are at least two groups.
A sampling method of a while-drilling fixed-point closed sampling device is carried out according to the following steps:
s1: installing a coring outer cylinder, connecting the coring outer cylinder of claim 1 with a drill rod, and feeding into a drill hole.
S2: coring: use the water under high pressure to cut the first spacing pin of getting the core inner tube, get the core inner tube and wholly remove to PDC drill bit direction, push up "crossbeam" of PDC drill bit, it stretches outside the PDC drill bit to get the core drill bit, the in-process that gets the core inner tube and remove, it is rotatory on the fluted disc of the core middle tube to drive the gear, thereby open the ball valve, it is fixed behind the core section of thick bamboo to check the device, it impels along with the drill rod of drilling machine to get the core inner tube, it gets the coal core to drive to get the core drill bit, coal core extrusion water separation ball, get into in the core section of thick bamboo behind.
S3: sealing a coal sample: and (3) replacing high-pressure water, cutting off a second limit pin of the core taking barrel by using the high-pressure water, pushing the core taking inner barrel to move forwards by the high-pressure water, driving a fluted disc of a gear on the core taking inner barrel to rotate by the core taking inner barrel, changing the opening state of the ball valve into the closing state, and sealing the taken coal core in the core taking inner barrel to finish coal sample collection and sealing.
By adopting the technical scheme, the invention has the beneficial effects that:
the core taking device is convenient to disassemble and maintain, is very convenient to match and connect with various drilling machines, drilling tools, emulsion pumps, gas desorption instruments and other equipment, is simple to operate in the core taking process, and has the characteristic of accurately, completely and quickly extracting high-quality coal core samples at fixed points of the core pipes; meanwhile, the coal core can be cut off at the bottom of the hole through the rotation of a ball valve at the front end of the coring inner cylinder, the coal core is ensured to be completely sealed in the coring inner cylinder in time after coring, the desorption instrument is directly connected with the sampling device to complete underground desorption, the loss of gas loss is avoided to the maximum extent, and the accuracy of the direct determination of the gas content in the deep hole is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the PDC opening and closing drill bit 1, the coring outer cylinder 2, the coring middle cylinder 3, the fixing bolt 4, the water-proof ball 5, the coring drill bit 6, the upper sealing ring 7, the ball valve 8, the ball valve switch 9, the ball valve sealing gasket 10, the coring inner cylinder 11, the limiting mechanism 12, the limiting hole 121, the limiting pin 122, the lower sealing device 13, the rubber pad 14, the hollow hexagon socket head cap screw 15, the non-return device 16 and the cross beam 17.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments as follows:
therefore, the following detailed description of the embodiments of the present invention, provided in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention, and all other embodiments, which can be obtained by those skilled in the art based on the embodiments of the present invention without inventive faculty, are within the scope of the invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other, so that the specific meaning of the terms in the invention can be understood by those skilled in the art.
In conjunction with FIG. 1: the utility model provides a along with boring airtight sampling device of fixed point, includes to get core urceolus 2, with get core 2 terminal PDC switching drill bit 1 through threaded connection of urceolus, get and be equipped with a plurality of stop gear 12 on the outer wall of urceolus 2, stop gear includes spacing hole 121, spacing downthehole spacing pin 122 that is equipped with, it is equipped with down sealing device 13, gets core inner tube 11 and gets core middle tube 3 to cover in proper order in the urceolus 2 to get, 13 pot heads of lower sealing device are established in getting core inner tube 11, be equipped with desorption mouth in the middle of the lower sealing device 13, be equipped with cavity hexagon socket head cap screw 15 in the desorption mouth, cavity hexagon socket head screw 15 one side is equipped with rubber pad 14, rubber pad 14 is located analytic mouth, still integrated into one piece has the capable chamber of going on the lower sealing device 13; be provided with ball valve 8 and ball valve switch 9 in the core is well section of thick bamboo 3, ball valve 8 with get and be provided with the sealed pad 10 of ball valve between the core is well section of thick bamboo 3, go up sealing washer 7 and establish in getting core well section of thick bamboo 3, ball valve switch 9 edge is provided with the fluted disc.
In this embodiment, a seal ring is arranged between the outer ring of the lower sealing device 13 and the inner ring of the coring inner cylinder 11.
In this embodiment, a plurality of sets of fixing bolts 4 are arranged between the coring outer cylinder 2 and the coring middle cylinder 3.
In this embodiment, the ball valve switch 9 is provided with an oblong tooth socket, the oblong tooth socket is engaged with a fluted disc of the ball valve switch 9, and the outer side cylinder wall of the coring middle cylinder 3 is provided with a plurality of flow guide grooves along the axial direction.
In this embodiment, there are at least two sets of the limiting mechanisms 12.
A sampling method of a while-drilling fixed-point closed sampling device is carried out according to the following steps:
s1: installing a core barrel 2, connecting the core barrel 2 of claim 1 with a drill rod, and feeding into a drill hole.
S2: coring: use the water under high pressure to cut the first spacing pin of getting core inner tube 11, get core inner tube 11 and wholly remove to PDC drill bit direction, the crossbeam 17 of back-open PDC drill bit, it stretches outside the PDC drill bit to get core drill bit 6, the in-process that gets core inner tube 11 and remove, it is rotatory on getting core middle tube 3's fluted disc to drive the gear, thereby open ball valve 8, the back of the fixed core section of thick bamboo of taking of contrary device 16, it impels along with the drill rod to get core inner tube 11, it gets the coal core to drive to get core drill bit 6 to bore, coal core extrusion water-proof ball 5, through getting into behind the sealed ball valve 8 in the core section of thick bamboo.
S3: sealing a coal sample: the high-pressure water is replaced, the second limiting pin of the core taking barrel is cut off by the high-pressure water, the high-pressure water pushes the core taking inner barrel 11 to move forwards, the core taking inner barrel 11 drives the gear to rotate on the fluted disc of the core taking inner barrel 3, the ball valve 8 is changed from an open state to a closed state, the taken coal core is sealed in the core taking inner barrel 11, and coal sample collection and sealing are completed.
The core taking device is convenient to disassemble and maintain, is very convenient to match and connect with various drilling machines, drilling tools, emulsion pumps, gas desorption instruments and other equipment, is simple to operate in the core taking process, and has the characteristic of accurately, completely and quickly extracting high-quality coal core samples at fixed points of the core pipes; meanwhile, the coal core can be cut off at the bottom of the hole through the rotation of a ball valve at the front end of the coring inner cylinder, the coal core is ensured to be completely sealed in the coring inner cylinder in time after coring, the desorption instrument is directly connected with the sampling device to complete underground desorption, the loss of gas loss is avoided to the maximum extent, and the accuracy of the direct determination of the gas content in the deep hole is improved.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a along with boring airtight sampling device of fixed point, includes coring outer cylinder, the PDC switching drill bit that passes through threaded connection with coring outer cylinder end, its characterized in that, set up a plurality of stop gear on coring outer cylinder outer wall, stop gear includes spacing hole, be equipped with spacing pin in the spacing hole, it is equipped with down sealing device, coring inner tube and coring well tube to overlap in proper order in the coring outer cylinder, a lower sealing device pot head is established in coring inner tube, be equipped with desorption mouth in the middle of the lower sealing device, be equipped with hollow hexagon socket head cap screw in the desorption mouth, hollow hexagon head cap screw one side is equipped with the rubber pad, the rubber pad is located analytic mouth, still integrated into one piece has the capable chamber of ending on the lower sealing device, the capable intracavity of ending is equipped with contrary;
be provided with ball valve and ball valve switch in getting the core well section of thick bamboo, be provided with the ball valve between the section of thick bamboo in ball valve and the core and seal up, go up the sealing washer and establish in getting the core well section of thick bamboo, ball valve switch edge is provided with the fluted disc.
2. The device for sampling while drilling fixed point hermetic sampling according to claim 1, wherein a sealing ring is arranged between the outer ring of the lower sealing device and the inner ring of the coring inner cylinder.
3. The device for sampling while drilling with fixed point sealing as claimed in claim 1, wherein a plurality of sets of fixing bolts are arranged between the outer core barrel and the middle core barrel.
4. The device for sampling while drilling and fixed point sealing as claimed in claim 1, wherein the ball valve switch is provided with an oblong tooth socket, the oblong tooth socket is engaged with a fluted disc of the ball valve switch, and the outer side wall of the coring middle cylinder is provided with a plurality of flow guide grooves along the axial direction.
5. The device for sampling while drilling fixed-point sealing as recited in claim 1, wherein there are at least two sets of limiting mechanisms.
6. A sampling method of a while-drilling fixed-point closed sampling device is characterized by comprising the following steps:
s1: installing a coring outer cylinder, connecting the coring outer cylinder of claim 1 with a drill rod, and feeding the drill rod into a drill hole;
s2: coring: cutting off a first limit pin of the inner core barrel by using high-pressure water, moving the inner core barrel integrally to the direction of the PDC drill bit, extending the core drill bit out of the PDC drill bit, driving a gear to rotate on a fluted disc of the middle core barrel in the moving process of the inner core barrel so as to open a ball valve, pushing the inner core barrel by a drill rod of a drilling machine after the inner core barrel is fixed by a non-return device, driving the core drill bit to drill a coal core, extruding a water-separation ball by the coal core, and entering the core barrel after passing through the sealing ball valve until the core barrel is filled;
s3: sealing a coal sample: and (3) replacing high-pressure water, cutting off a second limit pin of the core taking barrel by using the high-pressure water, pushing the core taking inner barrel to move forwards by the high-pressure water, driving a fluted disc of a gear on the core taking inner barrel to rotate by the core taking inner barrel, changing the opening state of the ball valve into the closing state, and sealing the taken coal core in the core taking inner barrel to finish coal sample collection and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122004.2A CN111122238A (en) | 2020-02-27 | 2020-02-27 | While-drilling fixed-point airtight sampling device and sampling method |
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| CN202010122004.2A CN111122238A (en) | 2020-02-27 | 2020-02-27 | While-drilling fixed-point airtight sampling device and sampling method |
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| CN111122238A true CN111122238A (en) | 2020-05-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137197A (en) * | 2021-06-03 | 2021-07-20 | 中国地质大学（北京） | High-rank coal sample coring device |
| CN113464080A (en) * | 2021-08-11 | 2021-10-01 | 晋能控股装备制造集团有限公司寺河煤矿 | Method and device for coal seam drilling and coring while drilling |
| CN113833407A (en) * | 2021-09-07 | 2021-12-24 | 中煤科工集团西安研究院有限公司 | Drill bit for drilling fixed-point airtight coring |
| CN114396240A (en) * | 2022-02-09 | 2022-04-26 | 贵州省矿山安全科学研究院有限公司 | Device and method for drilling low-temperature closed coal core in coal mine |
| CN114441216A (en) * | 2021-12-22 | 2022-05-06 | 中煤科工集团西安研究院有限公司 | Dry-type closed sampling method for underground deep hole of coal mine |
| CN114961615A (en) * | 2022-06-07 | 2022-08-30 | 中煤科工集团重庆研究院有限公司 | Pressure maintaining and sampling device for underground coal mine and using method |
| CN114961617A (en) * | 2022-07-29 | 2022-08-30 | 陕西太合智能钻探有限公司 | Hydrodynamic core drill |
| CN115478800A (en) * | 2022-09-19 | 2022-12-16 | 中煤科工集团重庆研究院有限公司 | Coal seam fixed-point quick-freezing coring device and coring method |
-
2020
- 2020-02-27 CN CN202010122004.2A patent/CN111122238A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137197B (en) * | 2021-06-03 | 2022-03-29 | 中国地质大学（北京） | High-rank coal sample coring device |
| CN113137197A (en) * | 2021-06-03 | 2021-07-20 | 中国地质大学（北京） | High-rank coal sample coring device |
| CN113464080A (en) * | 2021-08-11 | 2021-10-01 | 晋能控股装备制造集团有限公司寺河煤矿 | Method and device for coal seam drilling and coring while drilling |
| CN113833407A (en) * | 2021-09-07 | 2021-12-24 | 中煤科工集团西安研究院有限公司 | Drill bit for drilling fixed-point airtight coring |
| CN114441216A (en) * | 2021-12-22 | 2022-05-06 | 中煤科工集团西安研究院有限公司 | Dry-type closed sampling method for underground deep hole of coal mine |
| CN114396240B (en) * | 2022-02-09 | 2023-05-30 | 贵州省矿山安全科学研究院有限公司 | Underground low-temperature airtight coal core drilling device and method for coal mine |
| CN114396240A (en) * | 2022-02-09 | 2022-04-26 | 贵州省矿山安全科学研究院有限公司 | Device and method for drilling low-temperature closed coal core in coal mine |
| CN114961615A (en) * | 2022-06-07 | 2022-08-30 | 中煤科工集团重庆研究院有限公司 | Pressure maintaining and sampling device for underground coal mine and using method |
| CN114961615B (en) * | 2022-06-07 | 2023-09-19 | 中煤科工集团重庆研究院有限公司 | Colliery underground pressure maintaining sampling device and use method |
| CN114961617B (en) * | 2022-07-29 | 2022-10-25 | 陕西太合智能钻探有限公司 | Hydrodynamic core drill |
| CN114961617A (en) * | 2022-07-29 | 2022-08-30 | 陕西太合智能钻探有限公司 | Hydrodynamic core drill |
| CN115478800A (en) * | 2022-09-19 | 2022-12-16 | 中煤科工集团重庆研究院有限公司 | Coal seam fixed-point quick-freezing coring device and coring method |
| CN115478800B (en) * | 2022-09-19 | 2023-09-19 | 中煤科工集团重庆研究院有限公司 | Coal seam fixed-point quick-freezing coring device and coring method |
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Inventor after: Li Xuechen Inventor after: Wang Yusheng Inventor after: Shen Hongmei Inventor after: Wang Xiaomin Inventor after: Wei Peijin Inventor after: Zhang Qingtian Inventor after: Hao Dian Inventor after: Guo Yanfei Inventor after: Yi Shugang Inventor after: Yao Xueqing Inventor after: Magnificent Inventor after: Li Wenpei Inventor before: Li Xuechen Inventor before: Wang Yusheng Inventor before: Shen Hongmei Inventor before: Wang Xiaomin Inventor before: Wei Peijin Inventor before: Zhang Qingtian Inventor before: Hao Dian Inventor before: Guo Yanfei Inventor before: Yi Shugang Inventor before: Yao Xueqing Inventor before: Magnificent Inventor before: Li Wenpei |