CN102561970A - Fidelity transfer device for natural drill cores of natural gas hydrates and method - Google Patents

Fidelity transfer device for natural drill cores of natural gas hydrates and method Download PDF

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Publication number
CN102561970A
CN102561970A CN201110428462XA CN201110428462A CN102561970A CN 102561970 A CN102561970 A CN 102561970A CN 201110428462X A CN201110428462X A CN 201110428462XA CN 201110428462 A CN201110428462 A CN 201110428462A CN 102561970 A CN102561970 A CN 102561970A
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China
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cap
pressure
torus
temperature
transfer
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CN201110428462XA
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Chinese (zh)
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CN102561970B (en
Inventor
赵佳飞
宋永臣
戴喻
李夺
张翔武
任铭杨
杨明军
刘卫国
刘瑜
王大勇
张毅
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大连理工大学
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Abstract

The invention discloses a fidelity transfer device for natural drill cores of natural gas hydrates and a method, wherein the designed pressure of the fidelity transfer device ranges from 0 to 20 MPa, and the designed temperature ranges from minus 20 to 30 DEG C. The confining pressure, the axial load and the temperature of the natural drill cores are kept to accord with the underground burial conditions during the transfer process of the natural drill cores, so that the damage of the natural drill cores caused by the transfer process can be reduced effectively, the fidelity of the natural drill cores can be improved greatly, and data that are measured in later experiments can also achieve higher authenticity.

Description

The fidelity transfer device and the method for the natural core of a kind of gas hydrates
Technical field
The present invention relates to the fidelity transfer device of the natural core of a kind of gas hydrates, belong to oil scientific research Instrument technology field.
Background technology
The natural core of gas hydrates is the gas hydrates form that a kind of pure natural forms; The thing appearance that collects through the fidelity sampling technology; Can react the basic physical properties such as structure, mechanical property, heat-transfer character of exploitation place gas hydrates really, its result of study is had crucial directive significance to the exploitation of this area's gas hydrates.Tradition gas hydrates core transfer method normally to core the pressure release of lowering the temperature handle; Shift at low temperatures; And then revert in the testing arrangement and underground identical pressure and temp condition, but whether its structure can return to reset condition, still has very big dispute at present.Therefore traditional natural gas hydrate core transfer device and method can not realize the fidelity of natural core is shifted; Destroy natural gas rock core internal construction; Therefore analysis result can not guarantee with the actual truth of occurring in nature gas hydrates reservoir in full accordly, does not also appear in the newspapers about gas hydrates natural core fidelity transfer device and method at present.
Summary of the invention
In order to solve the problem that exists in the above-mentioned natural core transfer process; The present invention provides the fidelity transfer device and the method for the natural core of a kind of gas hydrates; Its purpose is to be applicable to that natural core sample shifts; Can still less reduce destruction, the real conditions that the data that the research test is obtained are pressed close to hydrate more to natural core internal construction.
The technical scheme that the present invention adopts is:
The fidelity transfer device of the natural core of gas hydrates; Comprise end cap, torus end cap, piston, interior pipe, outer tube, plate, O RunddichtringO; Two end caps, two torus end caps and interior pipe constitute hollow structure, hollow structure pack into piston and natural core; Left end cap and torus left end cap constitute the balancing gate pit, and the high pressure nitrogen that is used for pressure control is from the turnover of left end cap pressed gas inlet; In the torus right end cap plate is arranged, can control the break-make of hollow structure; Simultaneously, constitute loop temperature-control pressure control cavity between two torus end caps and outer tube, the interior pipe, the torus import gets into the temperature that is used to guarantee natural core sample from the outer tube bottom with the circulation cryogenic high pressure nitrogen of pressure, the torus outlet outflow through outer tube top; The inwall of outer tube is provided with the temperature pressure sensing device interface, is used to detect the temperature and the pressure of constant-temperature temperature-control pressure control cavity inner fluid; Described end cap, torus end cap, piston, outer tube adopt stainless steel material, and interior pipe adopts elastomeric material; The junction adopts the O RunddichtringO that torus is sealed between outer tube and torus end cap, torus end cap and the end cap.
Except that adopting natural core, this device also can be used for the transfer of the artificial core of gas hydrates.
The invention has the beneficial effects as follows: the design pressure 0~20MPa of this fidelity transfer device, design temperature is-20~30 ℃.In the transfer process of natural core; The confined pressure of natural core, axial compression and temperature all maintain and the land burial term harmonization; Can effectively reduce the destruction of transfer process to natural core, significantly improve the fidelity of natural core, the data that later experiments records also have higher authenticity.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the A-A sectional structure chart among Fig. 1.
Fig. 3 is the C-C sectional structure chart among Fig. 1.
Fig. 4 is the B-B sectional structure chart among Fig. 2.
Among the figure: 1 left end cap; 2 torus left end caps; The 3O RunddichtringO; The outlet of 4 torus; 5 temperature pressure sensing device interfaces; 6 outer tubes; Pipe in 7; 8 pistons; 9 torus right end caps; 10 plates; 11 right end caps; 12 bolts hole; 13 balancing gate pit's air inlet/outlets; 14 torus inlet.
The specific embodiment
In Fig. 1,2,3,4, provided the fidelity transfer device of the natural core of a kind of gas hydrates.Pipe, two torus end caps and two end caps were formed hollow structure, wherein pack into piston and natural core in this transfer device adopted one; Constitute loop temperature-control pressure control cavity between two torus end caps and an overcoat and the interior pipe; Adopt one to provide the constant temperature fluid bath of circulation of fluid to connect the circulation of fluid import to the temperature-control pressure-control fluid cavity to export with circulation of fluid, outer casing inner wall is provided with temperature and the pressure that the temperature pressure sensing device is used to detect constant-temperature temperature-control pressure control cavity inner fluid; Left end cap and torus left end cap have directly constituted a balancing gate pit, through controlling wherein pressure size, guarantee the axial compression of natural core, can make the core move left and right simultaneously; Torus right end cap inside is provided with a plate, and this plate can be controlled the open and close of torus right end cap.
Utilize the step of fidelity transfer device of the natural core of above-mentioned gas hydrates following:
The first step unloads the transfer device right end cap, plate is moved to correct position make the middle circular hole sealing of torus right end cap, and nitrogen injection in the balancing gate pit of left end cap and the formation of torus left end cap is that piston moves to the hollow structure right side;
Second step connected drill bit and torus right end cap, used bolt, in the balancing gate pit of drill pressure chamber and left end cap and the formation of torus left end cap, injected high pressure nitrogen simultaneously, and it is identical with core collection place pressure to be that pressure at both sides is all kept; Simultaneously; Constitute the temperature-control pressure-control fluid cavity between two torus end caps, outer tube and the interior pipes; Adopt a connection circulation of fluid import of constant temperature fluid bath and a circulation of fluid outlet that circulation of fluid is provided to the temperature-control pressure-control fluid cavity; Open the constant temperature and pressure bath, feed cryogenic high pressure nitrogen, guarantee the natural core land burial of its pressure and temperature term harmonization; The temperature pressure sensing device of outer casing inner wall detects the temperature and the pressure of nitrogen;
The 4th step, open the plate in drill bit and the torus right end cap, piston is docked with natural core; Increase simultaneously and keep drill bit end pressure chamber pressure; Piston and natural core can be moved in the transfer device stably, promote the torus right end cap subsequently, the closed end cap center hole; Shed drill bit, connect the fidelity clamper;
The 5th step; To clamper inner loop chamber feed with transfer device in identical circulation cryogenic high pressure nitrogen; And with the inner high pressure nitrogen that injects of clamper, pressure is consistent with the pressure in pressure chamber that transfer device left end cap and torus left end cap form, and keeps this pressure;
The 6th step, twitch plate, the middle circular hole of torus right end cap is opened; Increase and keep the transfer device left end cap and form nitrogen pressure in the balancing gate pit, make core mobile stably, the plate in the twitch clamper as in the clamper with the torus left end cap; Cut off core and seal clamper; Shed transfer device balancing gate pit pressure, the disconnection transfer device is connected with clamper, and the good seal clamper;
In the 7th step, natural core in the clamper is transported and analyzes.

Claims (3)

1. the fidelity transfer device of the natural core of gas hydrates is characterized in that,
This device comprises end cap, torus end cap, piston, interior pipe, outer tube, plate, O RunddichtringO, and two torus end caps, two end caps and interior pipe constitute hollow structure, pack in the interior pipe piston and natural core; Left end cap and torus left end cap constitute the balancing gate pit, and the high pressure nitrogen that is used for pressure control is from the turnover of left end cap pressed gas inlet; In the torus right end cap plate is arranged, the break-make of control hollow structure; Simultaneously, constitute loop temperature-control pressure control cavity between two torus end caps and outer tube, the interior pipe, the torus import gets into the temperature that is used to guarantee natural core sample from the outer tube bottom with the circulation cryogenic high pressure nitrogen of pressure, the torus outlet outflow through outer tube top; The inwall of outer tube is provided with the temperature pressure sensing device interface, is used to detect the temperature and the pressure of constant-temperature temperature-control pressure control cavity inner fluid; The junction adopts the O RunddichtringO that torus is sealed between outer tube and torus end cap, torus end cap and the end cap.
2. fidelity transfer device according to claim 1, its characteristic are that also end cap, torus end cap, piston, outer tube adopt stainless steel material, and interior pipe adopts elastomeric material.
3. the method for using of claim 1 or 2 described fidelity transfer devices is characterized in that comprising the steps:
The first step unloads the transfer device right end cap, plate is moved to correct position make the middle circular hole sealing of torus right end cap, and nitrogen injection in the balancing gate pit of left end cap and the formation of torus left end cap is that piston moves to the hollow structure right side;
Second step connected drill bit and torus right end cap, used bolt, in the balancing gate pit of drill pressure chamber and left end cap and the formation of torus left end cap, injected high pressure nitrogen simultaneously, and it is identical with core collection place pressure to be that pressure at both sides is all kept; Simultaneously; Constitute the temperature-control pressure-control fluid cavity between two torus end caps, outer tube and the interior pipes; Adopt a connection circulation of fluid import of constant temperature fluid bath and a circulation of fluid outlet that circulation of fluid is provided to the temperature-control pressure-control fluid cavity; Open the constant temperature and pressure bath, feed cryogenic high pressure nitrogen, guarantee the natural core land burial of its pressure and temperature term harmonization; The temperature pressure sensing device of outer casing inner wall detects the temperature and the pressure of nitrogen;
The 4th step, open the plate in drill bit and the torus right end cap, piston is docked with natural core; Increase simultaneously and keep drill bit end pressure chamber pressure; Piston and natural core are moved in the transfer device stably, promote the torus right end cap subsequently, the closed end cap center hole; Shed drill bit, connect the fidelity clamper;
The 5th step; To clamper inner loop chamber feed with transfer device in identical circulation cryogenic high pressure nitrogen; And with the inner high pressure nitrogen that injects of clamper, pressure is consistent with the pressure in pressure chamber that transfer device left end cap and torus left end cap form, and keeps this pressure;
The 6th step, twitch plate, the middle circular hole of torus right end cap is opened; Increase and keep the transfer device left end cap and form nitrogen pressure in the balancing gate pit, make core mobile stably, the plate in the twitch clamper as in the clamper with the torus left end cap; Cut off core and seal clamper; Shed transfer device balancing gate pit pressure, the disconnection transfer device is connected with clamper, and the good seal clamper;
In the 7th step, natural core in the clamper is transported and analyzes.
CN201110428462.XA 2011-12-20 2011-12-20 The fidelity transfer device of the natural core of a kind of gas hydrates and method CN102561970B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975849A (en) * 2014-04-08 2015-10-14 中国石油化工股份有限公司 Underground information interaction short section, underground information interaction system and work method of underground information interaction system
CN106092772A (en) * 2016-06-07 2016-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
CN109113615A (en) * 2018-08-13 2019-01-01 四川大学 Core fidelity cabin with pressure-keeping functions
CN109113614A (en) * 2018-08-13 2019-01-01 四川大学 The core fidelity cabin of constant temperature, constant pressure
CN109187122A (en) * 2018-08-20 2019-01-11 浙江大学 A kind of gas hydrates core sample pressure maintaining transfer device
CN109625622A (en) * 2018-10-25 2019-04-16 中国辐射防护研究院 A kind of core pressurized seal save set and method
CN109958401A (en) * 2019-03-14 2019-07-02 中国科学院地质与地球物理研究所 A kind of gas hydrates pressure maintaining coring sample transfer device and application method
WO2020034357A1 (en) * 2018-08-13 2020-02-20 四川大学 Rock core fidelity cabin
WO2020034359A1 (en) * 2018-08-13 2020-02-20 四川大学 Rock core fidelity cabin having thermostatic function
WO2020113720A1 (en) * 2018-12-07 2020-06-11 深圳大学 Fidelity coring device

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US6230825B1 (en) * 1998-07-29 2001-05-15 James T. Aumann Apparatus for recovering core samples under pressure
CN2613754Y (en) * 2003-04-18 2004-04-28 石油大学(华东)石油仪器仪表研究所 Preheatable constant-temp. three axial stress core holder
CN2655243Y (en) * 2003-07-10 2004-11-10 大庆油田有限责任公司 Multipurpose core clamp at high-temp high-pressure
US20050086949A1 (en) * 2001-11-30 2005-04-28 Noble Stephen D. Method and apparatus for delivering a high pressure gas from a cryogenic storage tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6230825B1 (en) * 1998-07-29 2001-05-15 James T. Aumann Apparatus for recovering core samples under pressure
US20050086949A1 (en) * 2001-11-30 2005-04-28 Noble Stephen D. Method and apparatus for delivering a high pressure gas from a cryogenic storage tank
CN2613754Y (en) * 2003-04-18 2004-04-28 石油大学(华东)石油仪器仪表研究所 Preheatable constant-temp. three axial stress core holder
CN2655243Y (en) * 2003-07-10 2004-11-10 大庆油田有限责任公司 Multipurpose core clamp at high-temp high-pressure

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104975849A (en) * 2014-04-08 2015-10-14 中国石油化工股份有限公司 Underground information interaction short section, underground information interaction system and work method of underground information interaction system
CN106092772A (en) * 2016-06-07 2016-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
CN106092772B (en) * 2016-06-07 2018-11-09 大连理工大学 A kind of gas hydrates core sample pressurize transfer type three-axis mounting and method
CN109113615A (en) * 2018-08-13 2019-01-01 四川大学 Core fidelity cabin with pressure-keeping functions
CN109113614A (en) * 2018-08-13 2019-01-01 四川大学 The core fidelity cabin of constant temperature, constant pressure
WO2020034357A1 (en) * 2018-08-13 2020-02-20 四川大学 Rock core fidelity cabin
WO2020034359A1 (en) * 2018-08-13 2020-02-20 四川大学 Rock core fidelity cabin having thermostatic function
WO2020034358A1 (en) * 2018-08-13 2020-02-20 四川大学 Core preservation compartment having constant pressure function
WO2020034360A1 (en) * 2018-08-13 2020-02-20 四川大学 Constant-temperature and constant-pressure core preservation chamber
CN109187122A (en) * 2018-08-20 2019-01-11 浙江大学 A kind of gas hydrates core sample pressure maintaining transfer device
CN109625622A (en) * 2018-10-25 2019-04-16 中国辐射防护研究院 A kind of core pressurized seal save set and method
WO2020113720A1 (en) * 2018-12-07 2020-06-11 深圳大学 Fidelity coring device
CN109958401A (en) * 2019-03-14 2019-07-02 中国科学院地质与地球物理研究所 A kind of gas hydrates pressure maintaining coring sample transfer device and application method

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Inventor after: Zhao Jiafei

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Inventor after: Ren Mingyang

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Free format text: CORRECT: INVENTOR; FROM: ZHAO JIAFEI SONG YONGCHEN DAI YU LI DUO ZHANG XIANGWU REN MINGYANG YANG MINGJUN LIU WEIGUO LIU YU WANG DAYONG ZHANG YI TO: ZHAO JIAFEI YANG LEI WANG JIAQI WU DI SONG YONGCHEN DAI YU LIU WEIGUO YANG MINGJUN LIU YU WANG DAYONG ZHANG YI LI DUO ZHANG XIANGWU REN MINGYANG

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