CN115822493A - Shipborne CT pressure maintaining sampling device coupled with electrical analysis and working method - Google Patents
Shipborne CT pressure maintaining sampling device coupled with electrical analysis and working method Download PDFInfo
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- CN115822493A CN115822493A CN202211365515.2A CN202211365515A CN115822493A CN 115822493 A CN115822493 A CN 115822493A CN 202211365515 A CN202211365515 A CN 202211365515A CN 115822493 A CN115822493 A CN 115822493A
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- pressure maintaining
- maintaining container
- container
- drilling tool
- sample
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- 238000005070 sampling Methods 0.000 title claims abstract description 20
- 238000004458 analytical method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000002591 computed tomography Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 7
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A pressure maintaining sampling device of shipborne CT coupled with electrical analysis and a working method thereof belong to the technical field of submarine surveying and detection. The pressure maintaining sampling device comprises a drilling tool inner pipe, a drilling tool outer pipe, a drill bit and a pressure maintaining container, wherein a turning plate one-way valve is arranged at the bottom of the pressure maintaining container, a one-way valve used for exhausting is arranged on a top plate, and an electrode plate used for detecting a sample is arranged on the inner wall of the pressure maintaining container. In the sampling process, gas in the pressure maintaining container is discharged through the one-way valve at the top, when the inner pipe of the drilling tool is lifted upwards, the one-way flap valve is closed downwards under the action of elasticity and pressure to finally cut off the sample column, the sampling is completed, and the flap one-way valve is closed to maintain the pressure of the sample in the pressure maintaining container. After the sample is transferred to the offshore platform, the electrical detection can be directly carried out through the electrode plate in the pressure maintaining container, so that the transfer of the sample and the test deviation caused by transferring the sample are avoided.
Description
Technical Field
The invention relates to a pressure maintaining sampling device for shipborne CT (computed tomography) coupled with electrical analysis and a working method, belonging to the technical field of submarine surveying and detection.
Background
The natural gas hydrate is commonly called as 'combustible ice', and is an ice-like crystalline compound which is formed by water molecules and gas molecules under the conditions of low temperature and high pressure and has a cage-like structure. It is ice-like in appearance and can burn when exposed to fire at normal temperature and pressure. The natural gas hydrate is a potential high-cleanliness fossil energy, and a large amount of geological, geophysical, geochemical, drilling and other related investigation works are carried out on governments, large oil and gas companies and various academic research institutions. The combustible ice is widely distributed in nature in sediments with the depth of 300-3000 m in sea area, 0-1000 m below sea bottom and permafrost region in land area.
In marine stratum exploration, the shipborne CT device can quickly acquire the occurrence condition of hydrates in a target area, provides real-time correction data for sediment layer exploration, and avoids a large amount of repeated meaningless drilling operations on the target area and the land. In a conventional sampling device, a sample needs to be transferred to a specific detection instrument after sampling, and the original pressure borne by the sample cannot be maintained in the transfer process, so that the detection result is deviated.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a pressure maintaining and sampling device for ship-borne CT coupled with electrical analysis, which adopts a method of integrating a test electrode slice into a pressure maintaining container for sampling; after the sample is obtained, the integrated electrode plate can be used for detecting under the original pressure environment and other conditions of the sample, so that the deviation of the detection result caused by sample transfer is avoided.
The technical scheme adopted by the invention is as follows: a pressure maintaining sampling device for ship-borne CT coupled with electrical analysis comprises a drilling tool inner pipe and a drilling tool outer pipe, wherein the drilling tool outer pipe is in threaded connection with a drill bit, and drilling teeth and drill bit holes are arranged below the drill bit;
a pressure maintaining container is arranged in the drill bit, a flap check valve is arranged at the bottom of the pressure maintaining container, and a check valve is arranged on a top plate of the pressure maintaining container; an electrode plate is arranged on the inner wall of the pressure maintaining container;
and cooling liquid flow channels are arranged between the outer pipe of the drilling tool and the inner pipe of the drilling tool and between the drill bit and the pressure maintaining container.
A working method of a pressure maintaining sampling device of an on-board CT coupled with electrical analysis comprises the following steps:
a. the outer pipe of the drilling tool drives the drill bit to rotate, and the drill teeth rotate downwards for tunneling;
b. the sample column cut and formed by the drill bit hole moves upwards relative to the pressure maintaining container, and the sample column pushes the flap check valve below the pressure maintaining container to enter the inner cavity of the pressure maintaining container.
c. Original gas in the inner cavity of the pressure maintaining container is exhausted to the outside of the container through the one-way gas valve under the action of pressure, so that the sample column smoothly enters;
d. after the sample completely enters the pressure maintaining container, the inner pipe of the drilling tool is lifted upwards, and the one-way flap valve is closed downwards under the action of elasticity and pressure to finally cut off the sample column;
e. the inner pipe of the drilling tool drives the pressure maintaining container to move upwards to the offshore platform for shipborne CT analysis, and electrical detection is carried out through electrode plates arranged in the pressure maintaining container.
The invention has the beneficial effects that: the pressure maintaining sampling device comprises a drilling tool inner pipe, a drilling tool outer pipe, a drill bit and a pressure maintaining container, wherein a flap check valve is arranged at the bottom of the pressure maintaining container, a check valve for exhausting is arranged on a top plate, and an electrode plate for detecting a sample is arranged on the inner wall of the pressure maintaining container. In the sampling process, gas in the pressure maintaining container is discharged through the one-way valve at the top, when the inner pipe of the drilling tool is lifted upwards, the one-way flap valve is closed downwards under the action of elasticity and pressure to finally cut off the sample column, the sampling is completed, and the flap one-way valve is closed to maintain the pressure of the sample in the pressure maintaining container. After the sample is transferred to the offshore platform, the electrical detection can be directly carried out through the electrode plates in the pressure maintaining container, and the transfer of the sample and the test deviation brought by the transfer of the sample are avoided.
Drawings
FIG. 1 is a block diagram of a dwell sampling apparatus coupled to an on-board CT for electrical analysis.
In the figure: 1. the drilling tool comprises a drilling tool inner pipe, 2, a drilling tool outer pipe, 3, a pressure maintaining container, 3a, a pressure maintaining container top plate, 3b, a pressure maintaining container inner wall, 4, an electrode plate, 5, a drill bit, 5a, a drill bit hole, 6, a sample column, 7, a drill tooth, 8, a flap check valve, 9, a pressure maintaining container inner cavity, 10, a check valve, 11 and a cooling liquid flow channel.
Detailed Description
Fig. 1 shows a pressure-maintaining sampling device for on-board CT coupled with electrical analysis, which comprises a drilling tool inner pipe 1 and a drilling tool outer pipe 2, wherein the drilling tool outer pipe 2 is in threaded connection with a drilling head 5, and drilling teeth 7 and drilling head holes 5a are arranged below the drilling head 5; a pressure maintaining container 3 is arranged in the drill bit 5, a flap one-way valve 8 is arranged at the bottom of the pressure maintaining container 3, and a one-way valve 10 is arranged on a top plate 3a of the pressure maintaining container; an electrode plate 4 is arranged on the inner wall 3b of the pressure maintaining container; and cooling liquid flow passages 11 are arranged between the drill bit 5 and the pressure maintaining container 3 and between the drilling tool outer pipe 2 and the drilling tool inner pipe 1.
A working method of a pressure maintaining sampling device of an on-board CT coupled with electrical analysis comprises the following steps:
a. the drilling tool outer pipe 2 drives the drill bit 5 to rotate, and the drill teeth 7 are driven to downwards rotate for tunneling; while the rotary excavation is carried out, liquid separated out from the stratum flows out upwards along the cooling liquid flow passages 11 between the drill bit 5 and the pressure maintaining container 3 and between the outer pipe 2 and the inner pipe 1 of the drilling tool.
b. The sample column 6 cut and formed by the drill bit hole 5a moves upward relative to the pressure maintaining container 3, and the sample column 6 pushes the flap check valve 8 below the pressure maintaining container 3 to enter the inner cavity 9 of the pressure maintaining container.
c. Original gas in the inner cavity 9 of the pressure maintaining container is exhausted to the outside of the container through the one-way gas valve 10 under the action of pressure, so that the sample column 6 smoothly enters.
d. After the sample completely enters the pressure maintaining container 3, the inner tube 1 of the drilling tool is lifted upwards, and the one-way flap valve 8 is closed downwards under the action of elasticity and pressure to finally cut off the sample column 6.
e. The inner pipe 1 of the drilling tool drives the pressure maintaining container 3 to move upwards to an offshore platform, and the shipborne CT analysis and the electrical detection are carried out through the electrode plates 4 arranged in the pressure maintaining container 3.
Claims (2)
1. The utility model provides a pressurize sampling device of on-board CT of coupling electrical analysis, it includes drilling tool inner tube (1) and drilling tool outer tube (2), its characterized in that: the outer pipe (2) of the drilling tool is in threaded connection with a drill bit (5), and drill teeth (7) and a drill bit hole (5 a) are arranged below the drill bit (5);
a pressure maintaining container (3) is arranged in the drill bit (5), a flap one-way valve (8) is arranged at the bottom of the pressure maintaining container (3), and a one-way valve (10) is arranged on a top plate (3 a) of the pressure maintaining container; an electrode plate (4) is arranged on the inner wall (3 b) of the pressure maintaining container;
and cooling liquid flow channels (11) are arranged between the outer pipe (2) and the inner pipe (1) of the drilling tool and between the drill bit (5) and the pressure maintaining container (3).
2. The method of claim 1, comprising the steps of:
a. the drill outer pipe (2) drives the drill bit (5) to rotate, and the drill teeth (7) rotate downwards for tunneling;
b. a sample column (6) cut and formed by a drill bit hole (5 a) moves upwards relative to the pressure maintaining container (3), and the sample column (6) pushes a turning one-way valve (8) below the pressure maintaining container (3) to enter an inner cavity (9) of the pressure maintaining container;
c. original gas in an inner cavity (9) of the pressure maintaining container is discharged to the outside of the container through a one-way gas valve (10) under the action of pressure, so that a sample column (6) smoothly enters;
d. after the sample completely enters the pressure maintaining container (3), the inner tube (1) of the drilling tool is lifted upwards, and the one-way flap valve (8) is closed downwards under the action of elasticity and pressure to finally cut off the sample column (6);
e. the inner pipe (1) of the drilling tool drives the pressure maintaining container (3) to move upwards to an offshore platform for shipborne CT analysis, and electrical detection is carried out through an electrode plate (4) arranged in the pressure maintaining container (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210317717 | 2022-03-29 | ||
| CN2022103177173 | 2022-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115822493A true CN115822493A (en) | 2023-03-21 |
Family
ID=85526336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211365515.2A Pending CN115822493A (en) | 2022-03-29 | 2022-11-03 | Shipborne CT pressure maintaining sampling device coupled with electrical analysis and working method |
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| Country | Link |
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| CN (1) | CN115822493A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435749A (en) * | 2007-11-15 | 2009-05-20 | 中国石化集团胜利石油管理局钻井工艺研究院 | Drill stem type hydrate probe boring sampling apparatus |
| US20140262532A1 (en) * | 2013-03-15 | 2014-09-18 | Japan Agency For Marine-Earth Science And Technology | Core sampling apparatus and container transfer apparatus |
| US20140262527A1 (en) * | 2011-10-25 | 2014-09-18 | Corsyde International GMBH & Co., KG | Device and method for extracting a sample while maintaining a pressure that is present at the sample extraction location |
| CN108360994A (en) * | 2018-03-08 | 2018-08-03 | 吉林大学 | Impact rotating formula gas hydrate hole-bottom frozen cord coring drill and method |
| CN108761024A (en) * | 2018-05-24 | 2018-11-06 | 大连理工大学 | A kind of boat-carrying detection method of gas hydrates core fidelity sample |
| CN108761023A (en) * | 2018-05-24 | 2018-11-06 | 大连理工大学 | A kind of sea bed gas hydrate core boat-carrying multifunctional analysis laboratory installation |
| CN214886948U (en) * | 2021-05-24 | 2021-11-26 | 大庆明悦石油科技有限公司 | Well drilling pressure maintaining closed coring tool |
-
2022
- 2022-11-03 CN CN202211365515.2A patent/CN115822493A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101435749A (en) * | 2007-11-15 | 2009-05-20 | 中国石化集团胜利石油管理局钻井工艺研究院 | Drill stem type hydrate probe boring sampling apparatus |
| US20140262527A1 (en) * | 2011-10-25 | 2014-09-18 | Corsyde International GMBH & Co., KG | Device and method for extracting a sample while maintaining a pressure that is present at the sample extraction location |
| US20140262532A1 (en) * | 2013-03-15 | 2014-09-18 | Japan Agency For Marine-Earth Science And Technology | Core sampling apparatus and container transfer apparatus |
| CN108360994A (en) * | 2018-03-08 | 2018-08-03 | 吉林大学 | Impact rotating formula gas hydrate hole-bottom frozen cord coring drill and method |
| CN108761024A (en) * | 2018-05-24 | 2018-11-06 | 大连理工大学 | A kind of boat-carrying detection method of gas hydrates core fidelity sample |
| CN108761023A (en) * | 2018-05-24 | 2018-11-06 | 大连理工大学 | A kind of sea bed gas hydrate core boat-carrying multifunctional analysis laboratory installation |
| CN214886948U (en) * | 2021-05-24 | 2021-11-26 | 大庆明悦石油科技有限公司 | Well drilling pressure maintaining closed coring tool |
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