CN106840837B - A kind of air drilling coal gas chilled sampling apparatus - Google Patents
A kind of air drilling coal gas chilled sampling apparatus Download PDFInfo
- Publication number
- CN106840837B CN106840837B CN201710224031.9A CN201710224031A CN106840837B CN 106840837 B CN106840837 B CN 106840837B CN 201710224031 A CN201710224031 A CN 201710224031A CN 106840837 B CN106840837 B CN 106840837B
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- CN
- China
- Prior art keywords
- core barrel
- liner
- taper core
- taper
- piston
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/088—Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling
Abstract
The invention discloses a kind of air drilling coal gas chilled sampling apparatus, belong to safety of coal mines protection technology field, it includes the vacuum heat-insulating layer formed by shell (6) inner wall and liner (7) and coolant jacket (11) welded closure, the liquid nitrogen locker room that liner (7) inner cavity is constituted, the freezing chamber being made of coolant jacket (11) inner wall and taper core barrel (12) outer wall and end cap (14), the heat preservation sampling room that taper core barrel (12) inner cavity is constituted, the closed water container being made of piston (13) and taper core barrel (12).The solution have the advantages that: effectively solving the problems, such as during air drilling that coal sample moisture content is low by the method for closed water container prestoring water causes freezing sampling effect poor, liquid nitrogen stores indoor liquid nitrogen and is released by second one-way valve automatic leakage into freezing chamber, realize the moisturizing freezing of coal sample, easy to operate, sample time shortens.
Description
Technical field
The invention belongs to safety of coal mines protection technology fields, and in particular to a kind of coal gas chilled sampling apparatus is suitable for coal
Spot sampling is carried out to coal containing methane gas in the development process of field.
Background technique
Coal-bed gas parameter is precisely obtained, it is most important to mash gas outburst prevention and improvement etc..Coal gas sampling technique is evaluation
Gas pressure, the key technology means of content.Currently, the measurement of coal-bed gas is mainly using the direct survey based on sampling technique
Determine method, but existing sampling technique leads to nothing in the presence of leading to problems such as gas loss amount larger since gas is exposed in air
Method carries out precise measurement to coal-bed gas pressure and content, and highly gassy mine is made to there is " low index " outburst hazard.
106124243 A of Chinese patent literature CN discloses a kind of coal seam gas-bearing capacity measurement on November 16th, 2016
Advanced freezing sampling method, 1), using core plugging notifying mechanism of rope core drilling it is comprising steps of creep into left to 0 .2m of distance objective coal surface
Right stopping drilling operation；2) fluid delivery tube is transferred in drilling by drilling rod center, and connects the end of fluid delivery tube
Nearly foot of hole；3) cryogen persistently, is pumped into foot of hole by fluid delivery tube from ground by liquid nitrogen pump, makes to bore
The region 3-5m below the bottom of hole is refrigerated to sub-zero frozen state；4), propose that fluid delivery tube, then tripping in wire line coring bore
The corer of tool quickly carries out coring drilling operation；5) when, creeping into 3m, stop drilling operation, quickly mention corer to ground
Table, and sample is fitted into hermetically sealed can rapidly.This method can guarantee that coal seam core sample does not solve in drilling, migration process
Loss is inhaled, the gas original position content state of coal seam sample can be kept.
But the operating process of the patent is cumbersome, the sample time of coal seam rock core is longer.
Summary of the invention
For the technical problems in the prior art, the technical problem to be solved by the invention is to provide a kind of air
Drilling coal gas chilled sampling apparatus, it can effectively inhibit desorption of mash gas, coal gas loss amount during down-sampling, and grasp
It is simple to make process, sample time shortens.
The technical problem to be solved by the present invention is in this way technical solution realize, it include by outer casing inner wall with
Liquid nitrogen locker room that vacuum heat-insulating layer that liner and coolant jacket welded closure are formed, interior gallbladder intracavity are constituted, by coolant jacket inner wall and
The heat preservation sampling room of freezing chamber, taper core tube cavity composition that taper core pipe outer wall and end cap are constituted；Sampler top connection
It is sealed on shell top opening, through thread set in sampler top connection, drilling rod passes through to be covered outside shell drilling rod top connection lower port
It encloses, drilling rod upper end passes through thread bush stacks top connection lower part；The exhaust pipe of freezing chamber penetrates vacuum heat-insulating layer and connects up
The neck part of liner is connected to liquid nitrogen locker room；First check valve is mounted on liner top opening, and second one-way valve is mounted in liner at the bottom
On the pipeline being connected to freezing chamber, thimble is inserted in the matching hole at the top of taper core barrel, and it is unidirectional that the front end of thimble stretches to second
Valve, matching hole are provided with the spring for resetting thimble；Piston installs the inner cavity lower section of taper core barrel, and the end cap with through-hole is mounted in
Taper core barrel infraoral is to limit the position of piston, and the smooth straight of piston and taper core tube cavity lower section cooperates, by living
Plug constitutes closed water container with taper core barrel, and drilling rod lower end is connect by screw thread with drill bit.
Working principle of the present invention:
It is inverted the present invention first, since taper core tube cavity is a back taper, piston is pushed away into taper core tube cavity
After the smooth straight section of lower section, taper core barrel open, be packed into full packages water after pull-up piston be allowed to under taper core tube cavity
The smooth straight section cooperation of section, after water seal will be added in taper basket, upright sampler.
The first check valve is removed, liquid nitrogen is poured into after expiring by the neck part of liner, loads onto the first check valve, and will sampling
By threaded closure caps in shell top opening, sampler top connection is connect by screw thread with drilling rod top connection for device top connection, installs drilling rod
After drill bit, the present invention is protruded into foot of hole and carries out drive sampling operation.
In drilling process, coal sample enters taper core barrel, and piston is pushed up to open in taper core barrel and is prestored
Water, prestoring water, which enters, under the effect of gravity becomes aqueous coal sample in coal sample, persistently pushes piston upwards straight when entering sample
To being contacted with thimble and thimble being pushed to move up opening second one-way valve, liquid nitrogen is prestored under the effect of gravity and passes through second one-way valve stream
Enter freezing chamber, realization freezes the aqueous coal sample in taper core barrel, stops drilling operation, extracts after waiting for 2-5 minutes quietly
Drilling tool recycles frozen samples.The nitrogen formed after liquid nitrogen endothermic gasification is stored by the liquid nitrogen that exhaust pipe enters liner formation
First check valve automatically opens exhaust pressure relief when room, single pressure are excessive.
The solution have the advantages that:
The present invention is acted on using gravity stream, effectively solves air drilling process by the method for closed water container prestoring water
The low problem for causing freezing sampling effect poor of middle coal sample moisture content, it is automatic by second one-way valve that liquid nitrogen stores indoor liquid nitrogen
It releases and flows into freezing chamber, realize the moisturizing freezing of coal sample, it is suppressed that desorption of mash gas reduces coal gas loss in sampling process
Amount, sampling are accurate；The configuration of the present invention is simple simultaneously, no electrical equipment control structure is easy to operate, and sample time shortens.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is the structural diagram of the present invention.
In figure: 1, drilling rod top connection, 2, exhaust pipe, 3, sampler top connection, the 4, first check valve, 5, drilling rod, 6, shell,
7, liner, 8, second one-way valve, 9, spring, 10, thimble, 11, coolant jacket, 12, taper core barrel, 13, piston, 14, end cap,
15, drill bit.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples:
As shown in Figure 1, the present invention includes being protected by the vacuum that 6 inner wall of shell and liner 7 and 11 welded closure of coolant jacket are formed
Liquid nitrogen locker room that warm layer, 7 inner cavity of liner are constituted is made of 11 inner wall of coolant jacket and 12 outer wall of taper core barrel and end cap 14
The heat preservation sampling room that freezing chamber, 12 inner cavity of taper core barrel are constituted；Sampler top connection 3 is sealed on 6 top opening of shell, connects on drilling rod
First 1 lower port is through thread set in sampler top connection 3, and drilling rod 5, which passes through, to be covered in 6 periphery of shell, and 5 upper end of drilling rod passes through screw thread
Cover 1 lower part of stacks top connection；The exhaust pipe 2 of freezing chamber penetrates vacuum heat-insulating layer and connects up neck part and liquid in liner 7
The connection of nitrogen locker room；First check valve 4 is mounted on 7 top opening of liner, and second one-way valve 8 is connected to mounted in 7 bottom of liner with freezing chamber
Pipeline on, thimble 10 is inserted in the matching hole at the top of taper core barrel 12, and second one-way valve 8 is stretched in the front end of thimble 10, matches
It closes hole and is provided with the spring 9 for resetting thimble 10；Piston 13 installs the inner cavity lower section of taper core barrel 12, the end cap 14 with through-hole
The position of piston 13 is limited mounted in 12 infraoral of taper core barrel, piston 13 is smooth straight with 12 inner cavity lower section of taper core barrel
Pipe cooperation, closed water container is made of piston 13 and taper core barrel 12, and 5 lower end of drilling rod is connect by screw thread with drill bit 15.
By being welded to connect, end cap 14 passes through screw thread and coolant jacket 11 and taper core for taper core barrel 12 and coolant jacket 11
Pipe 12 combines,
When needing to be sampled drilling to formation at target locations, the working principle of the invention is:
It is inverted the present invention first, since 12 inner cavity of taper core barrel is a back taper, piston 13 is pushed away into taper core barrel
After 12 smooth end straight pipes, taper core barrel 12 is opened, and pull-up piston 13 is allowed to and taper core barrel 12 after being packed into full packages water
The cooperation of smooth end straight pipe, after water seal will be added in taper basket 12, upright sampler.
The first check valve 4 is removed, liquid nitrogen is poured by the neck part of liner 7 and loads onto the first check valve 4 to after expiring, and will
By threaded closure caps in 6 top opening of shell, sampler top connection 3 is connect by screw thread with drilling rod top connection 1 for sampler top connection 3,
After drilling rod 5 and drill bit 15 are installed, the present invention is protruded into foot of hole and carries out drive sampling operation.
In drilling process, coal sample, which enters taper core barrel 12 and pushes up piston 13, to be opened in taper core barrel 12
Prestoring water, prestoring water, which enters, under the effect of gravity becomes aqueous coal sample in coal sample, persistently pushes piston 13 upward when entering sample
Movement opens second one-way valve 8 up to contacting and pushing thimble 10 to move up with thimble 10, prestores liquid nitrogen under the effect of gravity and passes through
The inflow of second one-way valve 8 is made of freezing chamber 11 inner wall of coolant jacket, 12 outer wall of taper core barrel and end cap 14, realizes to taper rock
Aqueous coal sample in core pipe 12 is freezed, and drilling operation is stopped, and drilling tool is extracted after waiting for quietly 2-5 minutes, recycles frozen samples.Liquid
The nitrogen formed after nitrogen endothermic gasification enters the liquid nitrogen locker room of the formation of liner 7 by exhaust pipe 2, first when single pressure is excessive
Check valve 4 automatically opens exhaust pressure relief.
Claims (1)
1. a kind of air drilling coal gas chilled sampling apparatus, including the liquid nitrogen locker room being made of liner (7) inner cavity, feature
It is: further includes the vacuum heat-insulating layer formed by shell (6) inner wall and liner (7) and coolant jacket (11) welded closure, by coolant jacket
(11) guarantor of inner wall and taper core barrel (12) outer wall and end cap (14) are constituted freezing chamber, taper core barrel (12) inner cavity composition
Warm sampling room；Sampler top connection (3) is sealed on shell (6) top opening, and drilling rod top connection (1) lower port is being taken by thread set
In sample device top connection (3), drilling rod (5), which passes through, to be covered in shell (6) periphery, and drilling rod (5) upper end passes through thread bush stacks top connection (1)
Lower part；The exhaust pipe (2) of freezing chamber penetrates vacuum heat-insulating layer and connects up to be connected in the neck part of liner (7), with liquid nitrogen locker room
It is logical；First check valve (4) is mounted on liner (7) top opening, and second one-way valve (8) is connected to mounted in liner (7) bottom with freezing chamber
On pipeline, thimble (10) is inserted in the matching hole at the top of taper core barrel (12), and second one-way valve is stretched in the front end of thimble (10)
(8), matching hole is provided with the spring (9) for resetting thimble (10)；Piston (13) installs the inner cavity lower section of taper core barrel (12),
End cap (14) with through-hole limits the position of piston (13), piston (13) and taper rock mounted in taper core barrel (12) infraoral
The smooth straight of core pipe (12) inner cavity lower section cooperates, and constitutes closed water container by piston (13) and taper core barrel (12), bores
Bar (5) lower end is connect by screw thread with drill bit (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224031.9A CN106840837B (en) | 2017-04-07 | 2017-04-07 | A kind of air drilling coal gas chilled sampling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710224031.9A CN106840837B (en) | 2017-04-07 | 2017-04-07 | A kind of air drilling coal gas chilled sampling apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106840837A CN106840837A (en) | 2017-06-13 |
| CN106840837B true CN106840837B (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710224031.9A Active CN106840837B (en) | 2017-04-07 | 2017-04-07 | A kind of air drilling coal gas chilled sampling apparatus |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060413A (en) * | 2018-09-27 | 2018-12-21 | 重庆交通大学 | A kind of sampling apparatus and its method of sampling for ground sample |
| CN110043211B (en) * | 2019-05-16 | 2021-10-08 | 重庆大学 | Semiconductor refrigeration type freezing coring device |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2303701Y (en) * | 1997-05-24 | 1999-01-13 | 文斌 | Injection type electric iron |
| CA2617376A1 (en) * | 2001-05-09 | 2002-11-09 | Pason Systems Corp. | Apparatus to recover sample gases from fluids |
| CN2880115Y (en) * | 2005-11-30 | 2007-03-21 | 湖南千山制药机械股份有限公司 | Double-chamber perfilling injector with needle |
| CN101532922A (en) * | 2008-03-14 | 2009-09-16 | 吉林大学 | Gas hydrate hole-bottom frozen sampler and sampling method thereof |
| CN102958613A (en) * | 2010-06-25 | 2013-03-06 | 梅特勒-托利多公开股份有限公司 | Sampling device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205691360U (en) * | 2016-06-16 | 2016-11-16 | 重庆大学 | Coal seam gas-bearing capacity measures advanced freezing sampler |
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2017
- 2017-04-07 CN CN201710224031.9A patent/CN106840837B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2303701Y (en) * | 1997-05-24 | 1999-01-13 | 文斌 | Injection type electric iron |
| CA2617376A1 (en) * | 2001-05-09 | 2002-11-09 | Pason Systems Corp. | Apparatus to recover sample gases from fluids |
| CN2880115Y (en) * | 2005-11-30 | 2007-03-21 | 湖南千山制药机械股份有限公司 | Double-chamber perfilling injector with needle |
| CN101532922A (en) * | 2008-03-14 | 2009-09-16 | 吉林大学 | Gas hydrate hole-bottom frozen sampler and sampling method thereof |
| CN102958613A (en) * | 2010-06-25 | 2013-03-06 | 梅特勒-托利多公开股份有限公司 | Sampling device and method |
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| CN106840837A (en) | 2017-06-13 |
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