CN2551990Y - Internal diameter change transition block for core holder - Google Patents
Internal diameter change transition block for core holder Download PDFInfo
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- CN2551990Y CN2551990Y CN 02206662 CN02206662U CN2551990Y CN 2551990 Y CN2551990 Y CN 2551990Y CN 02206662 CN02206662 CN 02206662 CN 02206662 U CN02206662 U CN 02206662U CN 2551990 Y CN2551990 Y CN 2551990Y
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- transition block
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Abstract
The utility model discloses an internal diameter change transition block for a core holder, relating to the core filtering rate detecting technique. When the sample specification of a core is smaller than the allowed specification of the core holder, increasing the transition block can detecting certain samples that are smaller than the standard specification of the core holder under the cnsition that the sealing condition allows. The design of the diameter change transition block widens the detecting range of the core filtering rate sample so as to be suitable for being widely used in various core holders with different specifications.
Description
Technical field
The utility model relates to a kind of device that is used to test the oil geology core permeability, relates in particular to reducing transition block in a kind of core holding unit.
Background technology
Core permeability test, rock core profit displacement test, tertiary oil recovery experiment etc. must be finished in core holding unit, and the core holding unit specification is always certain.As conventional core sample permeability test, the core sample specification that core holding unit allows is φ 25 * 25mm; The tertiary oil production in oil field coreflooding experiment, core holding unit sample detection specification is φ 38mm, the test sample minimum length is 50mm.To the requirement of detected sample, its up and down scale error must be controlled at ± 0.5mm in.The situation of sample in clamper that model closes normal value sees also Fig. 1.
In recent years, because the influence of core sample producing equipment and core sample self lithology all can have a considerable amount of core samples every year because of detecting less than the sample specification lower size limit.Particularly in order to reduce prospecting prime cost, many Oilfield using sidewall sampling technology, sidewall sampling sample diameter are usually all less than normal value, and the core holding unit that is used for conventional sample detection can't detect the sidewall sampling sample.If clamping is understood because diameter error is too big by force, rubber bush forms incomplete seal section in the contact position of sample and plug during sealing.See also Fig. 2, the figure illustrates, mark part with circle on 4 angles among the figure and be incomplete seal section when sample diameter situation in clamper during less than normal value.Because sample is less than normal value, its geometric parameter becomes again greatly the influence of test result, so measuring error can be very big; When the length of detected sample is too little, then axially can't withstand sample.
For surpassing the core sample that core holding unit detects the specification lower limit, generally no longer its sample is detected both at home and abroad at present.But usually because these its value of sample that do not meet standard are bigger, must detect in practice, therefore need to propose the way of a solution it.
The utility model content
The purpose of this utility model is to provide reducing transition block in a kind of core holding unit, improves the suitability that core holding unit allows test sample specification limit and core holding unit.
For achieving the above object, the reducing transition block is the circular metal piece in the core holding unit that the utility model provides, and offers a through hole in the axle center.This transition block is a series of, has 4 kinds of shapes, and the convenience in the narration is numbered it A, B, C, D transition block respectively.Be respectively:
The A transition block is that an end is major diameter, and the other end is the stepped appearance of minor diameter, and its reducing place is an inclined-plane; There is a groove end of minor diameter, and large diameter end face is a plane.
The B transition block is one coniform, and identical with the A transition block, there is a groove end of minor diameter, and large diameter end face is a smooth flat.
The C transition block is an isometrical right cylinder, and both ends of the surface are the plane.
The D transition block is an isometrical disk shape, and one end is identical with the B transition block with A a groove, and the other end is the plane.
During actual the use, above-mentioned 4 kinds of transition block can be according to the use of arranging in pairs or groups arbitrarily of the size of the non-standard sample of gathering.
The utility model is simple, practical, can solve the difficult problem in the actual test effectively.
Description of drawings
Fig. 1 has shown the situation of core sample in clamper of standard;
Fig. 2 has shown that length is qualified, but the too small situation of non-standard core sample in clamper of diameter;
Fig. 3 has shown that diameter is qualified, but the too small situation of non-standard core sample in clamper of length;
Fig. 4 has shown the situation of non-standard core sample in clamper that diameter and length are all too small;
Fig. 5 is the diagrammatic cross-section of 4 kinds of shape transition pieces;
Fig. 6 has shown when detecting diameter and length all less than the core sample of normal value, uses the situation of A and B transition block in clamper;
Fig. 7 shown when detecting diameter compliant value, and diameter uses the situation of D transition block during less than the core sample of normal value in clamper.
Embodiment
In test of conventional core sample permeability and the tertiary oil production in oil field coreflooding experiment, all use core holding unit, the structure of this core holding unit and using method are all the same, and to the requirement of detected sample, its up and down scale error must be controlled at ± 0.5mm in.Difference is the core sample specification difference that both core holding units of using allow, so the utility model is when specifically describing transition block, and the diameter of producing with Hai'an, Jiangsu is that to carry out the test of conventional core sample permeability be example to the core holding unit of 25mm.Because this clamper is an existing product, therefore do not belong to the category that the utility model is discussed.
See also Fig. 3, when the diameter of core sample 2 meets the requirements, length contact though form sealing with rubber bush 3 in clamper during less than standard, but can't with the plug 1 formation sealing of clamper.Also can't detect the permeability of core sample 2 in this case.
See also Fig. 4, all too small when the diameter and the length of core sample 2, it all can't form sealing with plug 1 and rubber bush 3 and contact in clamper.
The utility model has designed serial transition block at above-mentioned situation, the sealing problem of clamper when detecting the non-standard core sample to solve.
Its shape of transition block and the structure of the utility model design see also Fig. 5.The reducing transition block is the circular metal piece, and offers a through hole 4 in the axle center.Its transition block is a series of, has 4 kinds of shapes, and the convenience in the narration is numbered it A, B, C, D transition block respectively.
Because this embodiment is that the φ 25mm core holding unit of producing with Hai'an, Jiangsu is an example, the employed rubber bush of this clamper can finely carry out radial seal when the above core sample of clamping φ 15mm, and the present sidewall sampling sample diameter that occurs of Daqing oil field is generally between φ 16-20mm, can both be controlled at ± 0.2mm with batch sample error of processing, so the transition block end diameter of its making series is φ 16, φ 17, φ 18, φ 19, φ 20, outside diameter is φ 25; Quantity is that A, every kind of series of B transition block are 2, and C, D transition block are 1.The length of each transition block is: the A transition block is that 15mm, B transition block are that 5mm, D transition block are 1mm; And the C transition block has three kinds of sizes, is respectively 5mm, 10mm, 20mm.Wherein:
The A transition block is that an end is major diameter 11, and the other end is the stepped appearance of minor diameter 12, and its reducing place is an inclined-plane 13; There is a groove 14 end of minor diameter, and large diameter end face is a plane, and the major diameter end face does not show in the accompanying drawings owing to the visual angle reason of accompanying drawing, and this point is identical in 3 following serial transition block accompanying drawings.
The B transition block is one coniform, and there is a groove 16 minor diameter 15 ends, and major diameter 17 end faces are a smooth flat.
The C transition block is an isometrical right cylinder, and both ends of the surface are the plane.
The D transition block is an isometrical disk shape, and one end has a groove 18, and the other end is the plane.
The actual use of each transition block sees also Fig. 6 and Fig. 7.Above-mentioned 4 kinds of transition block can be according to the use of arranging in pairs or groups arbitrarily of the size of the non-standard sample of gathering.
When at first its diameter of core sample of description detection and length are all too small, see also Fig. 6.Between core sample 2 two ends and clamper plug, install two A transition block additional, or two B transition block, also can install an A transition block and a B transition block additional.Specifically decide on the size of the core sample 2 that detected, its principle is that core sample 2 is as the criterion to reach seal request by the transition block that installs additional.According to this principle, if the length of sample is too small, installs two the longest A transition block of length additional and still can't reach seal request, can also between transition block and plug, install the C transition block of appropriate size additional.In this sense, C transition block essence is the lengthening piece, and transition block that is in contact with it and plug end face are the plane, so two end faces of C transition block all are processed into the plane, to guarantee the sealing on the surface of contact.Each the transition block central through-hole 4 that installs additional links to each other for concentric with the air flue 19 of plug in clamper.Because installing additional of D transition block is a technology that is easier to imagine, so do not recommend accompanying drawing.Figure 6 shows that and installed an A transition block and a B transition block additional.When installing transition block additional, its groove surface contacts with the end face of sample, and air-flow is distributed on the rock core end face as far as possible.As can be seen from Figure 6, though sample is lack of standardization, after the sample two ends added transition block, rubber case can tightly seal up transition block in the core holding unit, incomplete seal section as shown in Figure 2 can not occur.
When detecting the diameter standard, and during the too small sample of length, see also Fig. 7.Sample length installs the D transition block in this case additional, if too hour, can install the C transition block additional as stated above between D transition block and clamper plug.
The utility model is by following application examples its good effect as can be seen
Application examples 1:
September 25 calendar year 2001, finish 4 core permeability test assignments of certain mouthful of prospect pit sidewall sampling sample that team of geological logging company of Daqing Oil Field Co., Ltd selects and recommends, sample diameter is all less than 23mm, install the transition block that the utility model provides additional during the core permeability test, solve a ultra-specification sample test difficult problem preferably.Detect raw readings and see Table 1.
Table 1
Core permeability detection record pound sign: detect the date: September 23 calendar year 2001
| Sample number into spectrum | Atmospheric pressure Mpa | Temperature ℃ | Sample length cm | Sample diameter cm | The pressure differential displayed value | Permeability 10 -3μm 2 | The infiltration type | Remarks |
| 1 | 0.1015 | 20.0 | 2.43 | 2.23 | 96.7 | 0.15 | Low | |
| 2 | 0.1015 | 20.0 | 2.43 | 2.22 | 99.3 | 0.04 | Low | |
| 3 | 0.1015 | 20.0 | 2.43 | 2.23 | 95.2 | 0.22 | Low | |
| 5 | 0.1015 | 20.5 | 2.43 | 2.22 | 89.6 | 0.47 | Low |
Application examples 2:
July 26 calendar year 2001, finishing Exploration Development Inst., Daqing Oil Field Co Ltd. three adopts the tertiary oil recovery displacement test sample selected and recommended a Room and amounts to 12 core permeability test assignments, existing sample length has sample diameter again less than 37.5mm's less than 50mm in these 12 samples.When reality is tested, in core holding unit, installed the transition block that the utility model provides additional.Detect raw readings and see Table 2.
Table 2
Core permeability detection record pound sign: detect the date: July 26 calendar year 2001
| Sample number into spectrum | Atmospheric pressure Mpa | Temperature ℃ | Sample length cm | Sample diameter cm | The pressure differential displayed value | Permeability 10 -3μm 2 | The infiltration type | Remarks |
| 1 | 0.1009 | 20.0 | 4.21 | 3.68 | 51.6 | 1.80 | Low | |
| 2 | 0.1009 | 20.0 | 4.36 | 3.69 | 70.9 | 0.90 | Low | |
| 3 | 0.1009 | 20.0 | 4.32 | 3.68 | 88.7 | 0.33 | Low | |
| 4 | 0.1009 | 20.0 | 4.36 | 3.77 | 83.2 | 0.47 | Low | |
| 5 | 0.1008 | 20.5 | 4.33 | 3.77 | 94.5 | 28.3 | Middle high | |
| 6 | 0.1008 | 20.5 | 4.13 | 3.78 | 84.4 | 79.7 | Middle high | |
| 7 | 0.1008 | 20.5 | 3.89 | 3.67 | 79.3 | 0.55 | Low | |
| 8 | 0.1008 | 20.5 | 4.24 | 3.69 | 91.6 | 45.1 | Middle high | |
| 9 | 0.1008 | 20.5 | 4.26 | 3.72 | 23.8 | 1108 | Middle high | |
| 10 | 0.1008 | 20.5 | 4.33 | 3.65 | 31.5 | 817 | Middle high | |
| 11 | 0.1008 | 20.5 | 4.32 | 3.65 | 28.7 | 923 | Middle high | |
| 12 | 0.1008 | 20.5 | 4.08 | 3.79 | 23.5 | 1039 | Middle high |
Claims (2)
1, reducing transition block in a kind of core holding unit is installed between core sample and the clamper plug, it is characterized in that described transition block is the circular metal piece, and offer a through hole in the axle center that 4 kinds of shapes are arranged, and is respectively:
(1) transition block is that an end is major diameter, and the other end is the stepped appearance of minor diameter, and its reducing place is an inclined-plane; There is a groove end of minor diameter, and large diameter end face is a plane;
(2) transition block is one coniform, and there is a groove at minor diameter end face place, and the major diameter end face is a smooth flat;
(3) transition block is an isometrical right cylinder, and both ends of the surface are the plane;
(4) transition block is an isometrical disk shape, and one end has a groove, and the other end is the plane.
2, reducing transition block in the core holding unit as claimed in claim 1 is characterized in that the diameter of described transition block is 16-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02206662 CN2551990Y (en) | 2002-02-27 | 2002-02-27 | Internal diameter change transition block for core holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02206662 CN2551990Y (en) | 2002-02-27 | 2002-02-27 | Internal diameter change transition block for core holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2551990Y true CN2551990Y (en) | 2003-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02206662 Expired - Lifetime CN2551990Y (en) | 2002-02-27 | 2002-02-27 | Internal diameter change transition block for core holder |
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| Country | Link |
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| CN (1) | CN2551990Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359922A (en) * | 2012-03-31 | 2013-10-23 | 浙江金徕镀膜有限公司 | Substrate fixing device used in toughening technology |
| CN110441221A (en) * | 2019-09-03 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司 | Full-diameter shale core annular sealed cabin clamping device and measuring process |
| CN112763391A (en) * | 2020-12-28 | 2021-05-07 | 中国科学院武汉岩土力学研究所 | Variable-diameter core holder |
-
2002
- 2002-02-27 CN CN 02206662 patent/CN2551990Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359922A (en) * | 2012-03-31 | 2013-10-23 | 浙江金徕镀膜有限公司 | Substrate fixing device used in toughening technology |
| CN103359922B (en) * | 2012-03-31 | 2016-08-03 | 浙江金徕镀膜有限公司 | A kind of apparatus for fixing substrate used in steel process |
| CN110441221A (en) * | 2019-09-03 | 2019-11-12 | 中国石油集团川庆钻探工程有限公司 | Full-diameter shale core annular sealed cabin clamping device and measuring process |
| CN110441221B (en) * | 2019-09-03 | 2021-10-22 | 中国石油集团川庆钻探工程有限公司 | Full-diameter shale core annular sealed cabin clamping device and measuring process |
| CN112763391A (en) * | 2020-12-28 | 2021-05-07 | 中国科学院武汉岩土力学研究所 | Variable-diameter core holder |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120227 Granted publication date: 20030521 |