CN2613754Y - Preheatable constant-temp. three axial stress core holder - Google Patents

Preheatable constant-temp. three axial stress core holder Download PDF

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Publication number
CN2613754Y
CN2613754Y CN 03246355 CN03246355U CN2613754Y CN 2613754 Y CN2613754 Y CN 2613754Y CN 03246355 CN03246355 CN 03246355 CN 03246355 U CN03246355 U CN 03246355U CN 2613754 Y CN2613754 Y CN 2613754Y
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CN
China
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axial
axial pressure
pressurizing
cap
fluid
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CN 03246355
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Chinese (zh)
Inventor
赵仕俊
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石油大学(华东)石油仪器仪表研究所
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Priority to CN 03246355 priority Critical patent/CN2613754Y/en
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Publication of CN2613754Y publication Critical patent/CN2613754Y/en

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Abstract

The utility model discloses a tri-axial stressing rock core clamp holder being capable of preheating and keeping temperature and comprising an inlet plug locking cap which is fixed on the radial pressurizing cylinder end, an outlet plug locking cap, a deforming compensation bar which is capable of axially sliding to compensate the deformation of a heat exchange coil, a fluid inlet joint pipe line, an axial pressurizing fluid pipe line, an axial pressurizing control valve, a radial pressurizing fluid pipe line, a radial pressurizing control valve, a heat exchanging coil coiled by the same material as the fluid inlet pipe line, an axial pressurizing hydraulic cylinder, a sealing ring, an axial pressuring plug, an axial pressurizing plug cap, a packing rock core rubber barrel, an electric heating device, a radial pressurizing tank, an outlet plug, a fluid outlet joint pipe line, and a temperature sensor. The tri-axial stressing rock core clamp holder designs the heat exchanging coil and an axial pressurizing mechanism comprising the axial pressurizing fluid pipe line, the axial pressurizing control valve, the axial pressurizing hydraulic tank, the sealing ring, the axial pressurizing plug, the axial pressurizing plug cap, and the like, therefore, the utility model not only is capable of achieving preheating and constant temperature to the rock core and the fluid through the rock core, but also is capable of achieving tri-axial stressing loading.

Description

But preheating constant temperature three axial stress core holding units

Technical field: the utility model relates to the geological exploration and development industry, is used for formation core is done a kind of experimental provision of rock core Physical Property Analysis, is referred to as core holding unit usually.

Background technology: in geological exploration and development, the particularly geologic prospecting of oil and rock gas and production exploitation aspect, need be from the relevant formation core of underground taking-up, take ground and do the experiment of rock core Physical Property Analysis, physical parameters such as the factor of porosity of measurement rock core, permeability perhaps carry out the displacement test relevant with production technique research.These requirement of experiment can simulated formation environment, the i.e. temperature on rock core stratum of living in, pressure etc.Generally, the formation temperature gradient is about 0.04 ℃/m, and pressure gradient is about 2.5KPa/m, the stratum that 4000m~7000m is dark, and temperature can reach 150 ℃~250 ℃, and terrastatic pressure is about 100MPa~175MPa.Therefore, the experimental provision that requires to be used for formation core is done the rock core Physical Property Analysis should be realized heated constant temperature to rock core and by the fluid of rock core, can realize that three axial stresses load to rock core again, with the environmental baseline on simulation stratum, rock core place.

The present core holding unit that uses, it is that rock core is placed in the packing element, and a steel plug is respectively placed at the two ends of rock core, and there is a through hole at the plug center, is connected to pipeline respectively, can allow Experimental Flowing Object cross rock core by pipe flow will; Packing element places in the steel cylinder and forms airtight annular space with steel cylinder, acts on the packing element outer wall when annular space is injected highly pressurised liquid, can make packing element produce distortion extruding rock core, in the experiment test just with this extruding force simulated formation pressure; Outer wall at packing element also is equipped with electric heating device, and available this electric heating device is to the heating of the liquid in the annular space, and liquid passes to rock core with heat by packing element again and makes the rock core heating, with the method simulated formation temperature.

Obviously there are two problems in above-mentioned core holding unit: the first acts on the packing element outer wall and makes packing element produce distortion when pushing rock core when annular space being injected highly pressurised liquid, this extruding force can only act on rock core radially can not act on rock core axially, therefore, it in fact only simulated rock core two dimensions on stratum to stressed.In fact, rock core is to be in a kind of three-dimensional stress on the stratum, obviously the stress that it can not the real simulation formation core.It two is when cryogen flows through rock core by pipeline and plug, pass to the heat of rock core owing to can not in time add hot fluid by packing element, fluid does not reach the simulated formation temperature of setting on the one hand, also make the core temperature reduction on the other hand and do not reach the simulated formation temperature of setting, therefore, the temperature that it can not the real simulation formation core.

Because two problems that above-mentioned core holding unit exists, the experiment test that uses this clamper to carry out obtains data and has departed from its actual value, causes certain experimental error.Yet there are no about can real simulation the patented technology of this class experimental provision of formation condition open.Therefore, need a kind of experimental provision that is used for formation core is done the rock core Physical Property Analysis of invention, should realize preheating constant temperature to the experiment formation core and by the fluid of rock core, can realize that three axial stresses load to the experiment formation core again, thereby can solve above-mentioned two problems.

Summary of the invention: but the purpose of this utility model is to provide a kind of preheating constant temperature three axial stress core holding units, but this preheating constant temperature three axial stress core holding units, can to rock core and by experiment the fluid of formation core realize preheating constant temperature, can realize that three axial stresses load to the experiment formation core again.

According to the purpose of this utility model, but a kind of preheating constant temperature three axial stress core holding units that provided, but the inlet plug locking cap of preheating constant temperature three axial stress core holding units and outlet plug locking cap are fixed on pressurized cylinder two ends radially; One is installed in axial pressure fluid cylinder end center pit, can deformation-compensated in axial sliding bar, and the distortion of compensation heat exchange coil under Axial Loads; The axial pressure liquid flowing line that the axial pressure operation valve is installed is communicated with the axial pressure fluid cylinder; The radially pressurization liquid flowing line of pressurization control valve radially is installed to be communicated with pressurized cylinder radially; Fluid intake joint pipeline, be communicated with the heat exchange coil and the axial pressure piston of the coiling of fluid intake pipeline same material, and place in the axial pressure fluid cylinder, the axial pressure piston cap is threaded with the axial pressure fluid cylinder; The packing element two ends of encapsulation rock core are installed on respectively on axial pressure piston and the outlet plug locking cap; Electric heating device is installed on the external cylindrical surface of pressurized cylinder radially; The outlet plug is communicated with the fluid outlet connection pipeline; O-ring seal sealing can deformation-compensated in axial sliding bar and axial pressure piston; Temperature sensor is pressed close to packing element sealing and is installed in radially in the pressurized cylinder; The pressure of simulated formation provides with a force (forcing) pump in the experiment test, and the temperature of simulated formation realizes that with electrically heated method big or small available computers or other control methods of simulated formation pressure and simulated formation temperature are controlled.

Aforesaid axial pressure fluid cylinder is characterized in that: this axial pressure fluid cylinder left end cap has an eccentric orfice, but coupling shaft to the pressurization liquid flowing line, left end cap also has a center pit, becomes movingly with deformation-compensated bar, has a seal groove in the hole.

Aforesaid heat exchange coil, it is characterized in that: the material of the material of heat exchange coil and fluid intake piping material and measure-alike, coil diameter is slightly less than axial pressure fluid cylinder internal diameter, coil lengths is advisable with the simulated formation temperature that the temperature in that can make fluid after the heat exchange arrive rock core equals to set, heat exchange coil one end and fluid intake joint pipeline are connected, and the center pit of the other end and axial pressure piston is connected.

Aforesaid axial pressure piston, it is characterized in that: the diameter at butt end of axial pressure piston becomes movingly and with O-ring seal to seal with axial pressure fluid cylinder internal diameter, top diameter is identical with the experiment core diameter, the axial pressure piston has a center pit, left end is communicated with heat exchange coil, and the arachnoid groove of opening on right-hand member and the end face links up.

Aforesaid axial pressure piston cap, it is characterized in that: the internal thread of axial pressure piston cap cooperates with the external thread of axial pressure fluid cylinder right-hand member, the axial pressure piston cap has a center pit, center-hole diameter is identical with the top diameter of axial pressure piston, and the external diameter of axial pressure piston cap becomes stationary fit with the bayonet socket internal diameter of packing element.

Compare with the existing core holding unit that is used for formation core is done the rock core Physical Property Analysis, but the utility model provides a kind of preheating constant temperature three axial stress core holding units, owing to designed heat exchange coil and by the axial pressure liquid flowing line, the axial pressure operation valve, the axial pressure fluid cylinder, O-ring seal, the axial pressure piston, the axial load maintainer that axial pressure piston cap etc. are formed, therefore, but its advantage is this preheating constant temperature three axial stress core holding units, can realize preheating constant temperature to the experiment formation core and by the fluid of rock core, can realize that three axial stresses load to the experiment formation core again.

Description of drawings: but a kind of preheating constant temperature three axial stress core holding unit structural drawing that Fig. 1 provides for the utility model.

Embodiment:, but provide a kind of illustrated embodiment of preheating constant temperature three axial stress core holding units as the utility model referring to Fig. 1.

But the utility model provides a kind of composition of preheating constant temperature three axial stress core holding units to be: but preheating constant temperature three axial stress core holding units are by inlet plug locking cap 1, deformation-compensated bar 2, fluid intake joint pipeline 3, axial pressure liquid flowing line 4, axial pressure operation valve 5, liquid flowing line 6 radially pressurizes, radially pressurization control valve 7, heat exchange coil 8, axial pressure fluid cylinder 9, O-ring seal 10, axial pressure piston cap 11, axial pressure piston 12, the packing element 13 of encapsulation rock core, experiment formation core 14, electric heating device 15, radially pressurized cylinder 16, outlet plug locking cap 17, outlet plug 18, fluid outlet connection pipeline 19 and temperature sensor 20 are formed.

But the utility model provides a kind of structure of preheating constant temperature three axial stress core holding units to be: inlet plug locking cap 1 and outlet plug locking cap 17 are fixed on the radially two ends of pressurized cylinder 16, packing element 13 1 ends are installed on the external cylindrical surface of outlet plug locking cap 17, and the other end is installed on the external cylindrical surface of axial pressure piston cap 11; Experiment formation core 14 is contained in the packing element 13, one end is tested formation core 14 with outlet plug 18 by cooperating precession to hold out against with outlet plug locking cap 17, other end process axial pressure liquid flowing line 4 and axial pressure operation valve 5, but by axial pressure fluid cylinder 9 pressurization impeller-hubs are held out against experiment formation core 14 to pressurizing piston 12; Fluid intake joint pipeline 3, deformation-compensated bar 2, heat exchange coil 8, axial pressure piston 12, experiment formation core 14, outlet plug 18 and fluid outlet connection pipeline 19 are communicated with; Heat exchange coil 8, axial pressure piston 12 are installed in the axial pressure fluid cylinder 9, and seal with O-ring seal, the internal thread of axial pressure piston cap 11 is connected with the left end external thread of axial pressure fluid cylinder 9, and the stroke of restrictive axial pressurizing piston 12 also provides clamping position for packing element 13; Axial pressure liquid flowing line 4 is communicated with an eccentric orfice of axial pressure fluid cylinder 9 left end caps, and axial pressure operation valve 5 installation shaft are on pressurization liquid flowing line 4; The liquid flowing line 6 that radially pressurizes is communicated with the ring cavity of pressurized cylinder 16 radially, and radially pressurization control valve 7 is installed on the liquid flowing line 6 that radially pressurizes; Electric heating device 15 is installed in radially on pressurized cylinder 16 external cylindrical surfaces; Temperature sensor 20 presses close to that packing element 13 is airtight to be installed in radially in the pressurized cylinder 16.

But the utility model provides a kind of principle of work of preheating constant temperature three axial stress core holding units to be: it is that rock core 14 is placed in the packing element 13, allow the 18 suitable precessions of outlet plug hold out against experiment formation core 14, the other end is by holding out against experiment formation core 14 to axial pressure fluid cylinder 9 pressurization impeller-hubs to pressurizing piston 12, can inject liquid to axial pressure fluid cylinder 9 with force (forcing) pump by axial pressure liquid flowing line 4 and axial pressure operation valve 5, can calculate according to the end area of moulding pressure and axial pressure piston 12 and to act on the axial stress of experiment formation core 14 on axially, liquid flowing line 6 and pressurization control valve 7 radially can be injected liquid to pressurized cylinder 16 radially with force (forcing) pump by radially pressurizeing, highly pressurised liquid enters the airtight annular space of packing element 13 and pressurized cylinder 16 radially and acts on the outer wall of packing element 13, make packing element 13 produce distortion extrusion experiment formation core 14, both can determine to act on the radial stress that experiment formation core 14 footpaths make progress according to moulding pressure, thereby three axially loaded states of experiment formation core 14 have been determined, with the pressure on stratum, the method simulated experiment formation core place; At the external cylindrical surface of pressurized cylinder 16 radially electric heating device 15 is installed also, liquid heating in 15 pairs of annular spaces of available this electric heating device, liquid passes to experiment formation core 14 with heat by packing element 13 again and makes the rock core heating, simultaneously also to deformation-compensated bar 2, heat exchange coil 8, axial pressure piston 12,9 heating of axial pressure fluid cylinder, when Experimental Flowing Object passes through deformation-compensated bar 2, heat exchange coil 8, axial pressure piston 12, when axial pressure fluid cylinder 9 flows through experiment formation core 14, because the heating path length of liquid stream process, and because of the thermal capacity of the liquid in the axial pressure fluid cylinder 9 big, before being enough to make liquid stream to flow into experiment formation core 14, reach the simulated formation temperature of setting by the heat exchange of heating coil 8, thereby simulated the formation temperature at rock core 14 places; With the reservoir pressure of being simulated in computing machine or other control methods control experiment test and the size of formation temperature.

Basic thought of the present utility model and illustrated embodiment more than have been described in detail; the person skilled in the art; do not deviating under the spirit of the present utility model and can make many changes, protection domain of the present utility model is determined by additional claims and equivalent thereof the utility model.

Claims (5)

1. but preheating constant temperature three axial stress core holding units, but it is characterized in that the inlet plug locking cap of preheating constant temperature three axial stress core holding units and outlet plug locking cap are fixed on radially pressurized cylinder two ends; The distortion of compensation heat exchange coil under Axial Loads, and can deformation-compensated in axial sliding bar, axial pressure fluid cylinder left end center pit be installed in; The axial pressure liquid flowing line that the axial pressure operation valve is installed is communicated with the axial pressure fluid cylinder; The radially pressurization liquid flowing line of pressurization control valve radially is installed to be communicated with pressurized cylinder radially; Fluid intake joint pipeline, be communicated with the heat exchange coil and the axial pressure piston of the coiling of fluid intake pipeline same material, and place in the axial pressure fluid cylinder, the axial pressure piston cap is threaded with the axial pressure fluid cylinder; The packing element two ends of encapsulation rock core are installed on respectively on axial pressure piston and the outlet plug locking cap; Electric heating device is installed on the external cylindrical surface of pressurized cylinder radially; The outlet plug is communicated with the fluid outlet connection pipeline; Temperature sensor is pressed close to packing element sealing and is installed in radially in the pressurized cylinder.
2. but preheating constant temperature three axial stress core holding units according to claim 1, it is characterized in that described axial pressure fluid cylinder left end cap has an eccentric orfice, but coupling shaft is to the pressurization liquid flowing line, left end cap also has a center pit, become movingly with deformation-compensated bar, have a seal groove in the hole.
3. but preheating constant temperature three axial stress core holding units according to claim 1, it is characterized in that described heat exchange coil diameter is slightly less than axial pressure fluid cylinder internal diameter, coil lengths is advisable with the simulated formation temperature that the temperature in that can make fluid after the heat exchange arrive rock core equals to set, heat exchange coil one end and deformation-compensated bar and fluid intake joint pipeline are connected, and the center pit of the other end and axial pressure piston is connected.
4. but preheating constant temperature three axial stress core holding units according to claim 1, the diameter at butt end that it is characterized in that described axial pressure piston becomes movingly with axial pressure fluid cylinder internal diameter, seal with O-ring seal, top diameter is identical with the experiment core diameter, the axial pressure piston has a center pit, left end and heat exchange coil link up together with, the arachnoid groove of opening on right-hand member and the end face.
5. but preheating constant temperature three axial stress core holding units according to claim 1, the internal thread that it is characterized in that described axial pressure piston cap is connected with the external thread of axial pressure fluid cylinder right-hand member, the axial pressure piston cap has a center pit, center-hole diameter is identical with the top diameter of axial pressure piston, and the external diameter of axial pressure piston cap becomes stationary fit with bayonet socket internal diameter in packing element.
CN 03246355 2003-04-18 2003-04-18 Preheatable constant-temp. three axial stress core holder CN2613754Y (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799485A (en) * 2010-04-12 2010-08-11 哈尔滨工业大学 Core holder and zeta electric potential measuring system and method using same
CN101509982B (en) * 2009-03-06 2011-05-11 大庆油田有限责任公司 Core electrofiltration potential measuring gripper
CN102411044A (en) * 2011-12-05 2012-04-11 中国石油大学(华东) Diagenesis simulation experimental apparatus and method
CN102561970A (en) * 2011-12-20 2012-07-11 大连理工大学 Fidelity transfer device for natural drill cores of natural gas hydrates and method
CN102852517A (en) * 2012-09-07 2013-01-02 中国石油天然气集团公司 Physical simulation method and device for formation temperature and pressure one-dimensional distribution
CN103061729A (en) * 2013-01-08 2013-04-24 北京科技大学 Anaerobic simple core flooding simulation system simulating method
CN103245769A (en) * 2013-04-17 2013-08-14 中国石油天然气股份有限公司 Long core water injection test simulation system
CN104807958A (en) * 2015-04-02 2015-07-29 中国石油天然气股份有限公司 Triaxial self-positioning core holder
CN105158446A (en) * 2015-10-20 2015-12-16 北京瑞莱博石油技术有限公司 High-temperature-resisting and high-pressure-resisting sealing piston, piston rod combination and thickened oil high-pressure texture analyzer
CN106198346A (en) * 2016-07-05 2016-12-07 西安交通大学 A kind of can measure mechanics parameter and the core holding unit of permeability and measuring method
US10845291B2 (en) 2017-05-16 2020-11-24 King Fahd University Of Petroleum And Minerals Radial core flooding apparatus and method for analysis of static and/or dynamic properties of reservoir rock

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101509982B (en) * 2009-03-06 2011-05-11 大庆油田有限责任公司 Core electrofiltration potential measuring gripper
CN101799485A (en) * 2010-04-12 2010-08-11 哈尔滨工业大学 Core holder and zeta electric potential measuring system and method using same
CN102411044B (en) * 2011-12-05 2014-04-30 中国石油大学(华东) Diagenesis simulation experimental apparatus
CN102411044A (en) * 2011-12-05 2012-04-11 中国石油大学(华东) Diagenesis simulation experimental apparatus and method
CN102561970A (en) * 2011-12-20 2012-07-11 大连理工大学 Fidelity transfer device for natural drill cores of natural gas hydrates and method
CN102852517A (en) * 2012-09-07 2013-01-02 中国石油天然气集团公司 Physical simulation method and device for formation temperature and pressure one-dimensional distribution
CN103061729B (en) * 2013-01-08 2015-08-26 北京科技大学 A kind of anaerobism simple and easy core flooding test simulation system analogy method
CN103061729A (en) * 2013-01-08 2013-04-24 北京科技大学 Anaerobic simple core flooding simulation system simulating method
CN103245769A (en) * 2013-04-17 2013-08-14 中国石油天然气股份有限公司 Long core water injection test simulation system
CN103245769B (en) * 2013-04-17 2015-01-21 中国石油天然气股份有限公司 Long core water injection test simulation system
CN104807958A (en) * 2015-04-02 2015-07-29 中国石油天然气股份有限公司 Triaxial self-positioning core holder
CN104807958B (en) * 2015-04-02 2016-07-06 中国石油天然气股份有限公司 A kind of three axial self-align core holding units
CN105158446A (en) * 2015-10-20 2015-12-16 北京瑞莱博石油技术有限公司 High-temperature-resisting and high-pressure-resisting sealing piston, piston rod combination and thickened oil high-pressure texture analyzer
CN106198346A (en) * 2016-07-05 2016-12-07 西安交通大学 A kind of can measure mechanics parameter and the core holding unit of permeability and measuring method
CN106198346B (en) * 2016-07-05 2019-04-09 西安交通大学 A kind of core holding unit and measurement method that can measure mechanics parameter and permeability
US10845291B2 (en) 2017-05-16 2020-11-24 King Fahd University Of Petroleum And Minerals Radial core flooding apparatus and method for analysis of static and/or dynamic properties of reservoir rock

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