CN2556632Y - Surround type sealed core holder - Google Patents
Surround type sealed core holder Download PDFInfo
- Publication number
- CN2556632Y CN2556632Y CN 02204326 CN02204326U CN2556632Y CN 2556632 Y CN2556632 Y CN 2556632Y CN 02204326 CN02204326 CN 02204326 CN 02204326 U CN02204326 U CN 02204326U CN 2556632 Y CN2556632 Y CN 2556632Y
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- rock
- rubber case
- core
- cylinder sleeve
- sealing
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
An encircling-type sealed rock-core gripper comprises: a cylinder liner of the gripper, two ends of which are respectively connected with a top pressing cap and a bottom pressing cap and the upper end of which is provided with a sealed air inlet; a pressing ring and a spring pocket pressing a rubber case tightly in the cylinder liner; a supporting bar positioned in the rubber case; a fixing bar sleeved with a compressing spring and connected with the supporting bar. The rock-core gripper adopts an air pressure sealing technology. When the air with sealing function enters into a cavity between the cylinder liner of the gripper and the rock-core rubber case, the side surface of the rock-core to be measured is pressed with confining pressure evenly, so as to achieve the aim of sealing the rock-core sample. In order to prevent the rubber case broken due to mistakenly turning on a confining pressure magnetic valve by an operator, the utility model is designed to be provided with the supporting bar so as to ensure that an underprop is always arranged in the rubber case. The design has good sealing capacity, simple structure, long service life and is convenient for loading and taking the rock-core sample, and the utility model can be widely used for permeability testing of various rock samples.
Description
Technical field
The design belongs to and is used for clamping and sealing rock core in oil geology experimental technique and the pressurized seal field, finishes the special arrangement of rock permeability test, specifically, relates to a kind of circumferential sealing core holder.
Background technology
The rock permeability conventional analysis is one of most important fundamental analysis project in laboratory, oil field.With the Daqing oil field is example, and the conventional sample analysis amount of year rock permeability is about 10,000 pieces, and workload is big.Core holding unit be a kind of can clamping and the sealing rock core, finish the special arrangement of rock permeability test.The effect of this device is that rock sample to be measured is put into wherein, and when guaranteeing test fluid flow by the core sample rear and front end, the side surface of rock can seal up fully.
Current, the packoff of core holding unit is nothing more than there being three types both at home and abroad:
First kind is mechanical sealing device, and it seals the core sample side surface not by gas or liquid and other medium by mechanical ramming heavy wall rubber case, as using lifting jack or screw thread pressurization.
Second kind is the hydrodynamic seal device, and it realizes sealing to rock sample by the liquid with certain pressure, squeezes into water under high pressure or other hydraulic seal as using automatic gauge pump or manually-actuated metering pump.
The third is the vapour-pressure type packoff, and it uses air or nitrogen as sealing medium.
In general, mechanical sealing mostly is manual operations, and sealing load is difficult to grasp, and after the seventies in 20th century, Petroleum Geology Laboratory has not adopted this technology mostly both at home and abroad.At present, the laboratory, oil field uses hydraulic pressure or pressurized seal device to finish every researchs such as rock permeability, rock core displacement, rock water blockoff both at home and abroad.From result of use, multiselect pressurized seal when sealing load is low, many employing hydraulic seals when the sealing load that requires is higher.
After 1975, domestic Daqing oil field, Sichuan oilfield etc. adopt pressurized seal technical design core holding unit in succession, have improved the work efficiency that rock permeability is analyzed greatly.But in actual test job, because the defective in the core holding unit design, the effectively solution of failing all the time usually causes the problem of core holding unit rubber case explosion because of admission pressure point unbalance stress or operating personnel's maloperation.Its major defect have following some:
1, the Haas produced of the American core company core holding unit of reining in unit development and designs such as type core holding unit and domestic Sichuan oilfield, Petroleum Univ. (East China) all adopts the axial admission technology, as three axial high pressure core holding units etc., the common defective of these clampers is the admission hypertonia, when the situation of pressure anomaly rising appears in high-pressure gas circuit, pressure can not stepless action on clamper cylinder sleeve and rubber case, the cylinder sleeve at admission place or rubber case are concentrated stressed, easily suppress brokenly rubber case, cause device to damage.
When 2, rock permeability was tested, rubber case wrapped core sample and prevents gas leakage.But during no core sample, add pressure electromagnetic valve if open by mistake in clamper, the above confined pressure of 1.0MPa is born by rubber case usually, and the rubber case bulging is up to explosion, and this phenomenon often takes place in the rock permeability analytical work.
3, use traditional pressurized seal formula core holding unit, clamper cylinder sleeve and rubber case often damage, the analyst will change the clamper cylinder sleeve in 2～3 months No. one time, sometimes will change a rubber case in several days, core holding unit is often often torn open and is unloaded, not only increased personnel's labour intensity, also work brings very big influence to analytical test.According to the working specification regulation, clamper cylinder sleeve of every replacing or rubber case all will be proofreaied and correct instrument.Behind each replacing cylinder sleeve or the rubber case, all will carry out the leak test check to testing process, adopt national grade ii standard material tester, work efficiency is difficult to improve.
The utility model content
The design's purpose is to provide a kind of circumferential sealing core holder, and this clamper has two outstanding advantages: the one, avoided easily making rubber case or clamper cylinder sleeve phenomenon in a certain concentrated stress point breakage because of the pressurization unbalance stress; The 2nd, rubber case can explosion when having guaranteed maloperation.
For achieving the above object, the circumferential sealing core holder that provides of the design has structure as described below:
One clamper cylinder sleeve, its two ends connect with top pressure ring cap and bottom pressure ring cap respectively, and the cylinder sleeve upper end is provided with sealing gas inlet;
One pressure ring and a spring housing are pressed on rubber case in the cylinder sleeve;
One support bar places in the rubber case:
A sheathed compression spring on one fixed bar, and connect with support bar.
Between described cylinder sleeve and the rubber case certain interval is arranged, form a cavity body.
Described cylinder sleeve and top pressure ring cap and bottom pressure ring cap are all with spiral marking connection.
Described fixed bar and support bar pass through spiral marking connection.
The design is simple in structure, and is reasonable in design, easy to operate, has following advantage:
1, change the intake method of core holding unit pressure seal system, adopt the circumferential sealing technology, it is evenly stressed to realize that core holding unit seals each parts, prevents clamper cylinder sleeve and rubber case explosion.
2, increase support bar in the core holding unit, efficiently solve when no test specimens to open and add the problem that pressure electromagnetic valve causes the rubber case explosion because of operating personnel's maloperation.Ad hoc meter one support bar of this invention, it can be reciprocating, props up specimen at the sample front end when sample is arranged, and enters in the core holding unit automatically during n.s., to guarantee in rubber case stilt being arranged all the time, the rubber case demolition accident does not take place when guaranteeing operating personnel's maloperation.
3, increase work efficiency, prolong each parts of core holding unit serviceable life, alleviate personnel labor intensity.
Description of drawings
Fig. 1 is the design's three-dimensional cutaway view.
Embodiment
See also accompanying drawing, what the design adopted is the pressurized seal mode, and it is mainly used in the permeability test of conventional rock sample.The sealing gas inlet is established in clamper cylinder sleeve 4 upper ends of this kind core holding unit, pressure ring 2 is pressed on rubber case 3 on the cylinder sleeve 4 with spring housing 6, the certain interval of having asked of cylinder sleeve 4 and rubber case 3, form a cavity body, when the gas of certain sealing load enters into cylinder sleeve 4 inside by confined pressure gas circuit end entrance from clamper cylinder sleeve 4, because between cylinder sleeve 4 and the rubber case 3 is a cavity body, this moment, gases at high pressure will be full of the cavity between cylinder sleeve 4 and the rubber case 3, employing is encircled sealing means and then the side surface of rock sample to be measured or support bar 5 is applied confined pressure, reaches the purpose of sealing core sample.Top pressure ring cap 1 all connects by screw thread screw thread and cylinder sleeve 4 with bottom pressure ring cap 8, and support bar 5 places in the rubber case 3, and fixed bar 9 passes through spiral marking connection with support bar 5, can move reciprocatingly under the effect of compression spring 7.Behind the core sample of packing in the core holding unit, by contracting behind the source of the gas driving fixed bar 9 drive support bars 5, spring 7 is compressed to certain position, satisfies test request.When test finishes or do not have core sample, cut off confined pressure gas circuit when not having confined pressure (or), after removing the source of the gas driving pressure, spring 7 is upspring, this moment, rock sample just was pushed out rubber case 3, support bar 5 enters in the rubber case 3 automatically, to guarantee in the rubber case 3 stilt being arranged all the time, prevents that maloperation from causing rubber case explosion or breakage.
Breakage of clamper cylinder sleeve or explosion do not take place in the clamper by above-mentioned design in the time in 2 years, more than the rubber case replacement cycle also once extends to half a year by average 2 months of past, alleviated analyst's labour intensity greatly, improved analytical work efficient, result of use is more satisfactory, and this point from following application examples also as can be seen.
Application examples
Adopt this design, 2000 and calendar year 2001 are finished the rock permeability conventional analysis task of about 20,000 pieces, table 1 is to use September calendar year 2001 circumferential sealing core holder to finish Daqing Area prospect pit rock permeability analysis task situation, and vital role has been brought into play in this invention aborning.
Use the design September calendar year 2001 and finish prospect pit rock permeability analysis situation
| Sequence number | Pound sign | Analyze the quantity piece | Analyze up-to-standard rate % | The device behaviour in |
| 1 | Luxuriant shallow 001 | ?102 | ?100 | |
| 2 | Ao 236-82 | ?125 | ?100 | |
| 3 | Too 18 | ?78 | ?100 | |
| 4 | Luxuriant shallow 002 | ?24 | ?100 | Well |
| 5 | Shellfish 3-1 | ?38 | ?100 | |
| 6 | Portugal 462 | ?12 | ?100 | Well |
| 7 | Du 56 | ?63 | ?100 | Well |
| 8 | Lucky 121-136 | ?160 | ?100 | Well |
| 9 | Defend dark 5 | ?21 | ?100 | Well |
Claims (4)
1, a kind of circumferential sealing core holder is characterized in that, includes:
One clamper cylinder sleeve, its two ends connect with top pressure ring cap and bottom pressure ring cap respectively, and the cylinder sleeve upper end is provided with sealing gas inlet;
One pressure ring and a spring housing are pressed on rubber case in the cylinder sleeve;
One support bar places in the rubber case;
A sheathed compression spring on one fixed bar, and connect with support bar.
2, circumferential sealing core holder as claimed in claim 1 is characterized in that, between described cylinder sleeve and the rubber case certain interval is arranged, and forms a cavity body.
3, circumferential sealing core holder as claimed in claim 1 is characterized in that, described cylinder sleeve and top pressure ring cap and bottom pressure ring cap are all with spiral marking connection.
4, circumferential sealing core holder as claimed in claim 1 is characterized in that, described fixed bar and support bar pass through spiral marking connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02204326 CN2556632Y (en) | 2002-01-29 | 2002-01-29 | Surround type sealed core holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02204326 CN2556632Y (en) | 2002-01-29 | 2002-01-29 | Surround type sealed core holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2556632Y true CN2556632Y (en) | 2003-06-18 |
Family
ID=33686288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02204326 Expired - Fee Related CN2556632Y (en) | 2002-01-29 | 2002-01-29 | Surround type sealed core holder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2556632Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332195C (en) * | 2004-04-02 | 2007-08-15 | 中国石油天然气集团公司 | High temperature, high pressure core dynamic harm valuation test instrument |
| 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 |
| CN101819174A (en) * | 2010-05-12 | 2010-09-01 | 中国石油天然气集团公司 | Device for measuring spontaneous potential of rocks |
| CN101509982B (en) * | 2009-03-06 | 2011-05-11 | 大庆油田有限责任公司 | Core electrofiltration potential measuring gripper |
| CN103306651A (en) * | 2013-05-16 | 2013-09-18 | 中国石油天然气股份有限公司 | CT Scanning System Based on Top Gas Injection Multi-angle Displacement |
| CN104677805A (en) * | 2015-03-20 | 2015-06-03 | 中国海洋石油总公司 | Rock core clamping device, pollution kettle and rock core damage evaluation experiment method |
| CN104729924A (en) * | 2015-03-10 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Rock core strength testing instrument and method |
| CN105115824A (en) * | 2015-09-18 | 2015-12-02 | 河南理工大学 | Rock confining pressure loading and unloading testing device |
| CN105424579A (en) * | 2015-12-02 | 2016-03-23 | 中国地质大学（武汉） | Static analog device and method for mud cake of coal-bed gas well |
| CN105741656A (en) * | 2016-05-12 | 2016-07-06 | 中国电子科技集团公司第四十一研究所 | Preparation device and method of annular electromagnetic material sample piece |
| CN112924361A (en) * | 2021-02-22 | 2021-06-08 | 绍兴文理学院 | Rock gas permeation detects uses permeability survey device |
-
2002
- 2002-01-29 CN CN 02204326 patent/CN2556632Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332195C (en) * | 2004-04-02 | 2007-08-15 | 中国石油天然气集团公司 | High temperature, high pressure core dynamic harm valuation test instrument |
| 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 |
| CN101819174A (en) * | 2010-05-12 | 2010-09-01 | 中国石油天然气集团公司 | Device for measuring spontaneous potential of rocks |
| CN101819174B (en) * | 2010-05-12 | 2012-08-15 | 中国石油天然气集团公司 | Device for measuring spontaneous potential of rocks |
| CN103306651B (en) * | 2013-05-16 | 2016-03-09 | 中国石油天然气股份有限公司 | CT Scanning System Based on Top Gas Injection Multi-angle Displacement |
| CN103306651A (en) * | 2013-05-16 | 2013-09-18 | 中国石油天然气股份有限公司 | CT Scanning System Based on Top Gas Injection Multi-angle Displacement |
| CN104729924B (en) * | 2015-03-10 | 2018-04-24 | 中石化石油工程技术服务有限公司 | A kind of core strength test instrument and test method |
| CN104729924A (en) * | 2015-03-10 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Rock core strength testing instrument and method |
| CN104677805A (en) * | 2015-03-20 | 2015-06-03 | 中国海洋石油总公司 | Rock core clamping device, pollution kettle and rock core damage evaluation experiment method |
| CN104677805B (en) * | 2015-03-20 | 2018-11-02 | 中国海洋石油集团有限公司 | A kind of the rock core damage evaluation experimental method and pollution kettle of core holding unit |
| CN105115824A (en) * | 2015-09-18 | 2015-12-02 | 河南理工大学 | Rock confining pressure loading and unloading testing device |
| CN105115824B (en) * | 2015-09-18 | 2018-11-16 | 河南理工大学 | A kind of rock confining pressure adds unloading test device |
| CN105424579A (en) * | 2015-12-02 | 2016-03-23 | 中国地质大学（武汉） | Static analog device and method for mud cake of coal-bed gas well |
| CN105741656A (en) * | 2016-05-12 | 2016-07-06 | 中国电子科技集团公司第四十一研究所 | Preparation device and method of annular electromagnetic material sample piece |
| CN112924361A (en) * | 2021-02-22 | 2021-06-08 | 绍兴文理学院 | Rock gas permeation detects uses permeability survey device |
| CN112924361B (en) * | 2021-02-22 | 2022-10-11 | 绍兴文理学院 | Rock gas permeation detects uses permeability survey device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030618 Termination date: 20100129 |