CN102707033A - Axial pressure device used for core holder - Google Patents
Axial pressure device used for core holder Download PDFInfo
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- CN102707033A CN102707033A CN2012101549017A CN201210154901A CN102707033A CN 102707033 A CN102707033 A CN 102707033A CN 2012101549017 A CN2012101549017 A CN 2012101549017A CN 201210154901 A CN201210154901 A CN 201210154901A CN 102707033 A CN102707033 A CN 102707033A
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- axle pressure
- holding unit
- axial pressure
- core holding
- axle
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Abstract
The invention provides an axial pressure device used for a core holder. The axial pressure device comprises a regulating choke plug and an axial pressure piston assembly, wherein the regulating choke plug is axially inserted into one side of the core holder and supported on the side end of a core to be measured in the core holder; the axial pressure piston assembly is sheathed on the outer wall of the regulating choke plug, the axial pressure piston assembly comprises an axial pressure barrel and an axial pressure piston, the axial pressure barrel is fixedly connected with a compaction nut located on one side of the core holder, the axial pressure piston is arranged in the axial pressure barrel and axially sheathed on the outer wall of the regulating choke plug in a sliding manner; the axial pressure piston is connected with the regulating choke plug through an axial pressure screw cap, and the regulating choke plug is driven to apply an axial pressure to the core to be measured by the axial pressure piston. The axial pressure device, provided by the invention, has the advantages of easy assembly and disassembly, convenience for cleaning, good sealing effect, adjustable length of the choke plug, small experiment error and wide application range.
Description
Technical field
The present invention relates to a kind of rock core reservoir physical simulation test unit, relate in particular to a kind of axle pressure device that is used for core holding unit.
Background technology
As everyone knows; The exploitation experiment is the basis of oil-gas field development; Not only can also provide method to guarantee for solving the many problems that run in the oil reservoir development for work such as the calculation of reserves of hydrocarbon-bearing pool, development plan establishment, numerical reservoir simulation provide basic oil deposit parameter.Core holding unit is purposes one of infrastructure component the most widely in the exploitation experiment, and nearly all exploitation experiment all will be used core holding unit.
At present; Existing core holding unit mainly divides two types according to pressuring method; A kind of is Ha Shi (Hassler) core holding unit, and it is that rock core is placed in the round rubber cover, places a cylindrical plug of steel with central through hole respectively at the rock core two ends; Through hole at plug is connected to pipeline respectively, can make Experimental Flowing Object cross rock core through pipe flow will.Rubber sleeve places in the circular steel cylinder and with steel cylinder and forms airtight annular space; When annular space is injected highly pressurised liquid; The pressure of highly pressurised liquid acts on the rubber sleeve outer wall, and rubber sleeve is deformed produce radial pressure rock core, but such clamper; Can not produce axle pressure, so its physical parameter of measuring rock core can not truly reflect the stratum stressing conditions.A kind of in addition is triaxial core holder, and it is on the basis of Ha Shi clamper, to improve to form, and has increased the axial pressure device at an end of clamper.Though this triaxial core holder can produce axle pressure to rock core, it still has following some shortcomings part:
1, in measuring the process of rock core, behind rock core of every measurement, all will clean, otherwise that residual rock core particle and foul will cause between plug and the rubber sleeve will be poorly sealed, thereby will cause the fluid leakage plug and rubber sleeve.And because the axial pressure device is fixed on an end of clamper, and the plug that links to each other with the axial pressure device is fixing thereupon, therefore causes loading and unloading sample and cleaning difficulty and cleans clean defective, directly influences measurement effect.
2, existing triaxial core holder owing to adopts between plug and the plug locking cap is threaded, will be when the loading and unloading rock core by a cylinder unit, and inconvenience very, and damage rock core easily.In addition, salt solution accumulates on the screw thread easily in the rock core, causes the screw thread corrosion easily.
3, in measuring process, if sample length alters a great deal, then need cause the loading and unloading difficulty, and cause importing and exporting the dead volume increasing by filling block, cause experimental error to increase.
Because the above-mentioned problems that exist in the prior art; The design people is based on being engaged in relevant manufacturing field rich experiences and strong excessively professional knowledge for many years, and is actual in conjunction with the application of core holding unit, actively studies innovation; In the hope of a kind of axle pressure device that is used for core holding unit is provided; This device is easy to dismounting, is convenient to core holding unit and cleans the little and plug adjustable length of experimental error.
Summary of the invention
The purpose of this invention is to provide a kind of axle pressure device that is used for core holding unit, this device is easy to dismounting, is convenient to core holding unit and cleans the little and plug adjustable length of experimental error.
For achieving the above object, the present invention proposes a kind of axle pressure device that is used for core holding unit, comprising: regulate plug, insert a side of said core holding unit vertically, and be resisted against the side of the rock core to be measured in the said core holding unit; The axle pressure piston component; Be set on the outer wall of said adjusting plug; Said axle pressure piston component comprises axle pressure cylindrical shell and axle pressure piston; Said axle pressure cylindrical shell is affixed with the clamping nut that is positioned at said core holding unit one side, and said axle pressure piston is arranged in the said axle pressure cylindrical shell, and can be sheathed on the outer wall of said adjusting plug axially slidably; Said axle pressure piston is connected with said adjusting plug through the axle pressure nut, and the said adjusting plug of said axle pressure piston actuated applies axle pressure to said rock core to be measured; Wherein, Said adjusting plug comprises shaft-like adjusting plug body and shackle; On said adjusting plug body, offer several draw-in grooves vertically continuously, said shackle is connected with the outside of said axle pressure nut, and is connected with the draw-in groove buckle of said adjusting plug.
The aforesaid axle pressure device that is used for core holding unit, wherein, said shackle is to be made up of C shape becket and the spring that connects said becket two ends.
The aforesaid axle pressure device that is used for core holding unit; Wherein, Said axle pressure nut comprises circular cap body; Side at said cap body convexes with cylindric junction surface vertically, is provided with clamping part vertically at the opposite side of said cap body, and said cylindric junction surface is inserted between the outer wall of inwall and said adjusting plug body of said axle pressure piston; The outer wall at said cylindric junction surface is connected with the inner thread of said axle pressure piston, and the groove that the side of said clamping part and said shackle is offered is clasped.
The aforesaid axle pressure device that is used for core holding unit, wherein, the said adjusting plug body shaft in edge is to offering first vent port and first inlet opening that connects this adjusting plug body.
The aforesaid axle pressure device that is used for core holding unit wherein, offers the axle pressure inlet opening and the axle pressure vent port that are connected with said axle pressure barrel respectively on the outer wall of said axle pressure cylindrical shell.
The aforesaid axle pressure device that is used for core holding unit wherein, is provided with O-ring seal between said axle pressure piston and said axle pressure cylindrical shell.
Compared with prior art, the present invention has following characteristics and advantage:
1, the radially confining pressure device of axle pressure piston component of the present invention and core holding unit is separate; Therefore can realize radial and axial pressurization respectively; Also can simulate hydrostatic conditions, promptly axially with radially pressurize simultaneously with a pressure source, improve accuracy of detection and detection quality.
2, axle pressure device of the present invention is through regulating plug body and locking snap fit; Realized regulating the dismounting function of plug; Help the inner cleaning of clamper, improved whole cleaning quality, avoid residual rock core particle and foul to cause between the gum cover in plug and the clamper poorly sealed; And cause the generation of fluid leakage phenomenon, and increased the reliability of sealing.
3, shackle of the present invention is selectable is provided with a plurality of draw-in grooves and is clasped with regulating the plug body, can be according to the different length sample, and quick adjustment is avoided the experimental error that is caused by the filling block dead volume in the prior art.
4, the present invention is at whole profit path favorable sealing property, and no spiral shell buckle on the profit path is avoided because the leakproofness that the corrosion of spiral shell button influence device spiral shell when loading and unloading sample is buckled the damage to sample.
Description of drawings
Accompanying drawing described here only is used for task of explanation, and is not intended to limit by any way scope disclosed by the invention.In addition, the shape of each parts among the figure and proportional sizes etc. are merely schematically, be used for helping to understanding of the present invention, and be not shape and the proportional sizes that specifically limits each parts of the present invention.Those skilled in the art can select various possible shapes and proportional sizes to come embodiment of the present invention under instruction of the present invention as the case may be.
Fig. 1 is used for the axle pressure device cross-sectional view of core holding unit for the present invention;
Fig. 2 is the structural representation of shackle of the present invention (among Fig. 1 A-A to);
Fig. 3 is the structural representation of axle pressure nut of the present invention;
Fig. 4 is used for the structural representation of the axle pressure device user mode of core holding unit for the present invention.
Description of reference numerals:
1-clamper cylindrical shell; The 2-rubber sleeve; 3-first set collar; 4-second set collar; 5-first clamping nut; 6-second clamping nut; 7-regulates plug; 71-regulates the plug body; The 72-shackle; The 73-draw-in groove; 74-C shape becket; The 75-spring; The 76-groove; 77-first vent port; 78-first inlet opening; 8-second plug; 9-axle pressure piston component; 91-axle pressure cylindrical shell; 92-axle pressure piston; 10-rock core to be measured; 11-axle pressure nut; 12-cap body; The cylindric junction surface of 13-; The 14-clamping part; 15-radial pressure inlet opening; 16-radial pressure vent port; 18-confined pressure space; The 19-O-ring seal; 20-axle pressure room; 21-axle pressure inlet opening; 22-axle pressure vent port.
Embodiment
In conjunction with the description of the accompanying drawing and the specific embodiment of the invention, can be well understood to details of the present invention more.But embodiment of the present invention described here only is used to explain the object of the invention, is limitation of the present invention and can not be understood as by any way.Under instruction of the present invention, the technician can conceive based on possible distortion arbitrarily of the present invention, and these all should be regarded as and belong to scope of the present invention.
Please refer to Fig. 1,4, for the present invention is used for the axle pressure device cross-sectional view of core holding unit and the structural representation of user mode.As shown in the figure; Core holding unit comprises clamper cylindrical shell 1, rubber sleeve 2, first set collar 3, second set collar 4, first clamping nut 5 and second clamping nut 6; The axle pressure device that is used for core holding unit of the present invention is plugged in a side of clamper cylindrical shell 1; Another side of clamper cylindrical shell 1 is provided with second plug 8 with quick fixation structure, and pushes up mutually and support with rock cores to be measured 10 in the rubber sleeve 2.Have certain interval between the outer wall of rubber sleeve 2 and clamper cylindrical shell 1 inwall and form radially confined pressure space 18; Through input pressure liquid in confined pressure space 18 radially; Make confined pressure space 18 be radially expanded; Through rubber sleeve 2 radial pressure is passed to rock core 10 to be measured, realizes rock core 10 to be measured is applied the effect of radial pressure.The axle pressure device that the present invention proposes comprises regulates plug 7 and axle pressure piston component 9; Adjusting plug 7 inserts a side of core holding unit vertically; And be resisted against the side of the rock core to be measured 10 in the core holding unit, make rock core 10 to be measured be clamped in and regulate between the plug 7 and second plug 8.Axle pressure piston component 9 is set on the outer wall of regulating plug 7; Axle pressure piston component 9 comprises axle pressure cylindrical shell 91 and axle pressure piston 92; Axle pressure cylindrical shell 91 is affixed with first clamping nut 5 that is positioned at core holding unit one side; Axle pressure piston 92 is arranged in the axle pressure cylindrical shell 91, and axle pressure piston 92 can be sheathed on the outer wall of regulating plug 7 axially slidably; Axle pressure piston 92 is connected with adjusting plug 7 through axle pressure nut 11, makes axle pressure piston 92 in sliding process, drive adjusting plug 7 and applies axle pressure to rock core 10 to be measured.The radially confining pressure device of axle pressure piston component of the present invention and core holding unit is separate; Therefore can realize radial and axial pressurization respectively; Also can simulate hydrostatic conditions, promptly axially with radially pressurize simultaneously with a pressure source, improve accuracy of detection and detection quality.
As a kind of improvement of the present invention; Regulate plug 7 and comprise shaft-like adjusting plug body 71 and shackle 72; Axially offer first vent port 77 and first inlet opening 78 that connects this adjusting plug body 71 along regulating plug body 71; On adjusting plug body 71, offer several draw-in grooves 73 vertically continuously; Shackle 72 is connected with the outside of axle pressure nut 11, and is connected with draw-in groove 73 buckles of regulating plug 7, makes that regulating plug body 71 links together through shackle 72 and axle pressure piston component 9 and core holding unit removably.So both be convenient to the dismounting of rock core to be measured; Again can be after rock core to be measured detects completion; When clamper inside is cleared up, will regulate the plug 7 and second plug 8 and pull down again respectively and clear up, improve whole cleaning quality; It is poorly sealed to avoid residual rock core particle and foul to cause between plug and the gum cover, and causes the generation of fluid leakage phenomenon.And; Physical length size according to rock core 10 to be measured; Can adjust shackle 72 and match, reach adjustment and regulate the effect that plug body 71 stretches into the interior length of cavity of rubber sleeve 2, make the present invention can be used for measuring the rock core of different length with the draw-in groove 73 of diverse location; It is big to have range of adjustment, need not to install additional the advantage of cylinder cushion block.And, because shackle 72 connects and fixes with regulating plug body 71, after rock core detects completion, only need pull down shackle 72, can will regulate plug body 71 by extracting in the clamper, have the advantage of convenient disassembly.
Further, please refer to Fig. 2, be the structural representation of shackle of the present invention.As shown in Figure 2, shackle 72 is to be made up of C shape becket 74 and the spring 75 that connects the becket two ends.Spring 75 plays the effect of tension C shape becket 74, guarantees that further shackle 72 is fixing with adjusting plug body 71 chuckings.
As a kind of optional embodiment of the present invention, as shown in Figure 3, be the structural representation of axle pressure nut of the present invention.
Further, as shown in Figure 4, on the outer wall of clamper cylindrical shell 1, offer the radial pressure inlet opening 15 and radial pressure vent port 16 that are connected with confined pressure space 18 respectively; Make pressure fluid to get in the confined pressure space 18 through radial pressure inlet opening 15; Expand in confined pressure space 18, rubber sleeve is pressurized radially, makes to produce radial pressure to rock core 10 to be measured; Gas can be discharged through radial pressure vent port 16 in the confined pressure space 18 simultaneously, is beneficial to confined pressure space 18 and expands.On the outer wall of axle pressure cylindrical shell 91, offer the axle pressure inlet opening 21 and axle pressure vent port 22 that are connected with axle pressure cylindrical shell 91 inside respectively; Making pressure fluid to enter to axle pressure cylindrical shell 91 inner also impeller-hubs through axle pressure inlet opening 21 radially moves to pressure piston; While axle pressure cylindrical shell 91 internal gas can be discharged through axle pressure vent port 22, apply axle pressure thereby realize driving adjusting plug 7 to rock core 10 to be measured.
In the present invention, axle pressure cylindrical shell 91 is a tubular structure, and side ring is established axle pressure piston 92 in it, is provided with two O-ring seals 19 between the two; This axle pressure cylindrical shell 91, axle pressure piston 92 and two 19 of O-ring seals form airtight ring shaped axial pressure room 20; This axle pressure cylindrical shell 91 is provided with axle pressure inlet opening 21 forcing pump of outside is connected with this axle pressure room 20; This axle pressure cylindrical shell 91 is provided with axle pressure vent port 22 and is communicated with this axle pressure room 20 and axle pressure cylindrical shell 91 outsides, discharges smoothly to guarantee the gas in the axle pressure room 20.Axle pressure of the present invention realizes through following process: at first; Forcing pump starts, and oil gets into axle pressure room 20 through axle pressure inlet opening 21, and axle pressure room 20 volumes enlarge impeller-hub and move towards first clamping nut, 6 directions vertically to pressure piston 92; And move to pressure nut 11 through spiral shell cingulum moving axis; Axle pressure nut 11 is fixed on to be regulated on the plug 7, moves to the rock core direction thereby drive adjusting plug 7, thus rock core is applied axial confined pressure.
The present invention regulates the front portion of plug body 71 and passes in axle pressure cylindrical shell 91, first clamping nut 5 and first set collar, 3 these rubber sleeves 2 of insertion when mounted; The front end face of regulating plug body 71 is resisted against on the side end face of rock core; Axle pressure nut 11 is sheathed on regulates plug body 71 outsides, and axle pressure nut 11 outside screw engage with these axle pressure piston 92 inside threads; Shackle 72 is fixed on axle pressure nut 11 on respective card slot 73 positions of regulating plug body 71; Shackle 72 can combine with corresponding draw-in groove 73 according to the length dimension of rock core 10 to be measured, realizes regulating the length adjustment function that plug body 71 inserts section.It is 70MPa that the present invention designs the maximum radial confined pressure, and axially confined pressure is 70MPa, and the maximum 70MPa of hydrodynamic pressure can be widely used in rock porosity, permeability, relative permeability, rock compressibility, formation sensitivity evaluation experimental etc.
To the illustrated in detail of above-mentioned each embodiment, its purpose only is the present invention is made an explanation, so that can understand the present invention better; But; It is limitation of the present invention that these descriptions can not be construed to any reason, and particularly, each characteristic of in different embodiment, describing is combination in any each other also; Thereby form other embodiments; Except clear and definite opposite description is arranged, these characteristics should be understood that can be applied in any one embodiment, and also not only are confined to described embodiment.
Claims (6)
1. an axle pressure device that is used for core holding unit is characterized in that, said axle pressure device comprises:
Regulate plug, insert a side of said core holding unit vertically, and be resisted against the side of the rock core to be measured in the said core holding unit;
The axle pressure piston component; Be set on the outer wall of said adjusting plug; Said axle pressure piston component comprises axle pressure cylindrical shell and axle pressure piston; Said axle pressure cylindrical shell is affixed with the clamping nut that is positioned at said core holding unit one side, and said axle pressure piston is arranged in the said axle pressure cylindrical shell, and can be sheathed on the outer wall of said adjusting plug axially slidably;
Said axle pressure piston is connected with said adjusting plug through the axle pressure nut, and the said adjusting plug of said axle pressure piston actuated applies axle pressure to said rock core to be measured;
Said adjusting plug comprises shaft-like adjusting plug body and shackle; On said adjusting plug body, offer several draw-in grooves vertically continuously; Said shackle is connected with the outside of said axle pressure nut, and is connected with the draw-in groove buckle of said adjusting plug.
2. the axle pressure device that is used for core holding unit as claimed in claim 1 is characterized in that, said shackle is to be made up of C shape becket and the spring that connects said becket two ends.
3. the axle pressure device that is used for core holding unit as claimed in claim 1; It is characterized in that; Said axle pressure nut comprises circular cap body; Side at said cap body convexes with cylindric junction surface vertically, is provided with clamping part vertically at the opposite side of said cap body, and said cylindric junction surface is inserted between the outer wall of inwall and said adjusting plug body of said axle pressure piston; The outer wall at said cylindric junction surface is connected with the inner thread of said axle pressure piston, and the groove that the side of said clamping part and said shackle is offered is clasped.
4. the axle pressure device that is used for core holding unit as claimed in claim 1 is characterized in that, the said adjusting plug body shaft in edge is to offering first vent port and first inlet opening that connects this adjusting plug body.
5. the axle pressure device that is used for core holding unit as claimed in claim 1 is characterized in that, on the outer wall of said axle pressure cylindrical shell, offers the axle pressure inlet opening and the axle pressure vent port that are connected with said axle pressure barrel respectively.
6. the axle pressure device that is used for core holding unit as claimed in claim 1 is characterized in that, between said axle pressure piston and said axle pressure cylindrical shell, is provided with O-ring seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210154901.7A CN102707033B (en) | 2012-05-17 | 2012-05-17 | Axial pressure device used for core holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210154901.7A CN102707033B (en) | 2012-05-17 | 2012-05-17 | Axial pressure device used for core holder |
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| Publication Number | Publication Date |
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| CN102707033A true CN102707033A (en) | 2012-10-03 |
| CN102707033B CN102707033B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210154901.7A Active CN102707033B (en) | 2012-05-17 | 2012-05-17 | Axial pressure device used for core holder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267174A (en) * | 2014-10-25 | 2015-01-07 | 吴建平 | Rock core holder |
| CN107238691A (en) * | 2016-03-29 | 2017-10-10 | 中国石油化工股份有限公司 | Rock core fastener |
| CN107796694A (en) * | 2017-09-27 | 2018-03-13 | 中南大学 | A kind of high temperature triaxial core hydraulic fracture clamper and its application method |
| US10107056B2 (en) | 2016-09-29 | 2018-10-23 | Petrochina Company Limited | Core holding system |
| CN110057686A (en) * | 2019-05-15 | 2019-07-26 | 江苏拓创科研仪器有限公司 | Cover pressure three axle clamp holder of analyzer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101446542A (en) * | 2008-12-15 | 2009-06-03 | 南通市飞宇石油科技开发有限公司 | Triaxial core holder |
| CN201527390U (en) * | 2009-11-04 | 2010-07-14 | 山东中石大石仪科技有限公司 | Core holding unit with adjustable quick installation core plug |
| CN202024950U (en) * | 2011-01-31 | 2011-11-02 | 中国石油化工集团公司 | Core holder with double-hole cylindrical plugs at two ends |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN202562914U (en) * | 2012-05-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Axial pressure device for core holder |
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2012
- 2012-05-17 CN CN201210154901.7A patent/CN102707033B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446542A (en) * | 2008-12-15 | 2009-06-03 | 南通市飞宇石油科技开发有限公司 | Triaxial core holder |
| CN201527390U (en) * | 2009-11-04 | 2010-07-14 | 山东中石大石仪科技有限公司 | Core holding unit with adjustable quick installation core plug |
| CN202024950U (en) * | 2011-01-31 | 2011-11-02 | 中国石油化工集团公司 | Core holder with double-hole cylindrical plugs at two ends |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN202562914U (en) * | 2012-05-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Axial pressure device for core holder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267174A (en) * | 2014-10-25 | 2015-01-07 | 吴建平 | Rock core holder |
| CN107238691A (en) * | 2016-03-29 | 2017-10-10 | 中国石油化工股份有限公司 | Rock core fastener |
| CN107238691B (en) * | 2016-03-29 | 2019-07-05 | 中国石油化工股份有限公司 | Rock core fastener |
| US10107056B2 (en) | 2016-09-29 | 2018-10-23 | Petrochina Company Limited | Core holding system |
| CN107796694A (en) * | 2017-09-27 | 2018-03-13 | 中南大学 | A kind of high temperature triaxial core hydraulic fracture clamper and its application method |
| CN110057686A (en) * | 2019-05-15 | 2019-07-26 | 江苏拓创科研仪器有限公司 | Cover pressure three axle clamp holder of analyzer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102707033B (en) | 2015-04-08 |
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