CN204330659U - A kind of evaluating apparatus of self-healing cement self-healing capability - Google Patents
A kind of evaluating apparatus of self-healing cement self-healing capability Download PDFInfo
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- CN204330659U CN204330659U CN201420816286.6U CN201420816286U CN204330659U CN 204330659 U CN204330659 U CN 204330659U CN 201420816286 U CN201420816286 U CN 201420816286U CN 204330659 U CN204330659 U CN 204330659U
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Abstract
The utility model relates to a kind of evaluating apparatus of self-healing cement self-healing capability, this device is primarily of Behavior of Hardened Cement Paste test specimen, electrode, conductivity measurement platform composition, the Behavior of Hardened Cement Paste test specimen be installed on support comprises urceolus, end cap and is positioned at the steel column at test specimen center, and described urceolus, end cap and steel column form surrounding sealing, interior xsect is concentrically ringed column body; Described conductivity measurement platform has measured value range adjuster, power switch and measured value display screen, and described electrode is connected conductivity measurement platform by wire with electrode suppor; The end cap of described Behavior of Hardened Cement Paste test specimen has electrode draw-in groove, for fixed electorde.The utility model comes microclearance that Simulated Water mudstone produces in subsurface environment or crack by manually producing cylindrical hole, by measuring the conductivity of electrolyte solution in different solidifying phase Behavior of Hardened Cement Paste through hole, as the index evaluating Behavior of Hardened Cement Paste self-healing capability, principle is reliable, simple to operate, by force comparative, can quantitatively evaluating, and applied widely, have broad application prospects.
Description
Technical field
The utility model relates to the evaluating apparatus of well cementation self-healing cement self-healing capability in the drilling engineering of petroleum natural gas exploration field.
Background technology
Oil gas well cementing operation cement mantle may produce the destruction such as microclearance or microfracture under external force, just probably causes the serious problems such as cement mantle packing inefficacy as it destroys to continue to develop.Well cementation circle proposes and addresses this problem with self-healing cement, and producing microclearance or microfracture that this kind of cement can be autonomous responds, shutoff microclearance or microfracture.Through years development, the research both at home and abroad in self-healing cement achieves very much progress, but does not form generally acknowledged evaluating apparatus and method yet for the evaluation of cement self-healing capability.
Through finding the literature search of existing self-healing capability evaluating apparatus and method, at present compressive strength restoring method and permeability rate method are mainly contained to the evaluation method of cement self-healing capability.Wherein compressive strength restoring method is by Behavior of Hardened Cement Paste prefabricated crack under a certain pressure, and continuation maintenance tests its compressive strength after certain length of time, compared with not adding the Behavior of Hardened Cement Paste of self-healing mixture, draws its compressive strength recovery extent, evaluates self-healing capability.Permeability method be by maintenance a couple of days after Behavior of Hardened Cement Paste, artificial manufacture crack after put back to original mould and continue maintenance, then take out after maintenance certain length of time and carry out permeability experiment, contrast with the permeability before manufacturing crack.The main problem that these two kinds of methods exist is that the distribution of made crack in Behavior of Hardened Cement Paste, Size of Crack, quantity are all uncontrollable, causes testing that result error between each test specimen is large, poor repeatability, and measuring process is more loaded down with trivial details, consuming time.
Utility model content
The purpose of this utility model is the evaluating apparatus providing a kind of self-healing cement self-healing capability, this device is by measuring the conductivity of electrolyte solution in Behavior of Hardened Cement Paste through hole, calculate the long-pending reduction in through hole effective cross section, Behavior of Hardened Cement Paste axial centre place number percent, thus quantitative evaluation is carried out to grout self-healing capability, principle is reliable, simple to operate, by force comparative, can quantitatively evaluating, and applied widely, have broad application prospects.
For reaching above technical purpose, the utility model provides following technical scheme.
A kind of evaluating apparatus of self-healing cement self-healing capability, primarily of Behavior of Hardened Cement Paste test specimen, electrode, conductivity measurement platform composition, the Behavior of Hardened Cement Paste test specimen be installed on support comprises urceolus, end cap and is positioned at the steel column at test specimen center, and described urceolus, end cap and steel column form surrounding sealing, interior xsect is concentrically ringed column body; Described conductivity measurement platform has measured value range adjuster, power switch and measured value display screen, and described electrode is connected conductivity measurement platform by wire with electrode suppor; The end cap of described Behavior of Hardened Cement Paste test specimen has electrode draw-in groove, for fixed electorde.
Filled by grout to be measured in the annular space be combined to form by urceolus, end cap and steel column, under certain environment, maintenance is to initial set, extracts steel column out, after continuing maintenance to final set.So manually produce cylindrical hole and come microclearance that Simulated Water mudstone produces in subsurface environment or crack, to undissolved water mudstone component be full of in Behavior of Hardened Cement Paste through hole, not affect the saturated electrolyte solution that Behavior of Hardened Cement Paste continues aquation again, by measuring the conductivity of electrolyte solution in different solidifying phase Behavior of Hardened Cement Paste through hole, just can reflect the change that maintenance different larval instar Behavior of Hardened Cement Paste through hole effective cross section is long-pending, as the index evaluating Behavior of Hardened Cement Paste self-healing capability, and do not destroy Behavior of Hardened Cement Paste, same test specimen can continuous coverage.
The conductivityσ of electrolyte solution in different solidifying phase Behavior of Hardened Cement Paste through hole:
In formula:
The cross-sectional area of A-Behavior of Hardened Cement Paste through hole, m
2;
The resistivity of ρ-electrolyte solution, Ω .m;
The length of L-Behavior of Hardened Cement Paste through hole, m.
The number percent that the self-healing capability of cement reduces with through hole cross-sectional area after experiencing the t time represents, is calculated by following formula:
In formula:
The self-healing capability of K-cement, %;
A
0the initial cross sectional of-Behavior of Hardened Cement Paste through hole is amassed, m
2;
The cross-sectional area of the Behavior of Hardened Cement Paste through hole of A-after the experience t time, m
2;
σ
0-Behavior of Hardened Cement Paste initial access hole is full of the conductivity of electrolyte solution, μ .S/cm;
σ-after the Behavior of Hardened Cement Paste experience t time, through hole is full of the conductivity of electrolyte solution, μ .S/cm.
Compared with prior art, the utility model has following beneficial effect:
(1) with the micro-annulus in artificial through hole Simulated Water mudstone or microfracture, make crack standardization, thus decrease because the factors such as crack quantity, width, space distribution are on the impact of test result;
(2) amassed by electrical conductivity of solution reflection through hole effective cross section in through hole, fracture self-healing degree can carry out quantitative evaluation, by artificial and environmental impact is little, reduce the error of data.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of evaluating apparatus of self-healing cement self-healing capability.
In figure: 1-Behavior of Hardened Cement Paste test specimen, 2-support, 3-electrode, 4-measured value range adjuster, 5-power switch, 6-conductivity measurement platform, 7-measured value display screen, 8-electrode suppor, 9-wire.
Fig. 2 is the structural representation of Behavior of Hardened Cement Paste test specimen.
In figure: 10-end cap, 11-urceolus, 12-steel column, 13-electrode draw-in groove.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
See Fig. 1.
A kind of evaluating apparatus of self-healing cement self-healing capability, form primarily of Behavior of Hardened Cement Paste test specimen 1, electrode 3, conductivity measurement platform 6, the Behavior of Hardened Cement Paste test specimen 1 be installed on support 2 comprises urceolus 11, end cap 10 and is positioned at the steel column 12 at test specimen center, and described urceolus, end cap and steel column form surrounding sealing, interior xsect is concentrically ringed column body; Described conductivity measurement platform 6 has measured value range adjuster 4, power switch 5 and measured value display screen 7, and described electrode 3 is connected conductivity measurement platform 6 by wire 9 with electrode suppor 8; The end cap 10 of described Behavior of Hardened Cement Paste test specimen has electrode draw-in groove 13, for fixed electorde 3.
See Fig. 2.
Behavior of Hardened Cement Paste test specimen comprises urceolus 11, end cap 10 and is positioned at the steel column 12 at test specimen center, and described end cap, urceolus and steel column are combined to form bottom and surrounding sealing, interior xsect is the column body of concentrically ringed splendid attire grout, and end cap 10 has electrode draw-in groove 13.
Described Behavior of Hardened Cement Paste test specimen diameter is 25.0 (mm), and length is 50.0 (mm).Along test specimen axial central through hole diameter 1.0 (mm).
Claims (1)
1. the evaluating apparatus of a self-healing cement self-healing capability, primarily of Behavior of Hardened Cement Paste test specimen (1), electrode (3), conductivity measurement platform (6) composition, it is characterized in that, the Behavior of Hardened Cement Paste test specimen (1) be installed on support (2) comprises urceolus (11), end cap (10) and is positioned at the steel column (12) at test specimen center, and described urceolus, end cap and steel column form surrounding sealing, interior xsect is concentrically ringed column body; Described conductivity measurement platform (6) has measured value range adjuster (4), power switch (5) and measured value display screen (7), and described electrode (3) is connected conductivity measurement platform (6) by wire (9) with electrode suppor (8); The end cap (10) of described Behavior of Hardened Cement Paste test specimen has electrode draw-in groove (13), for fixed electorde (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420816286.6U CN204330659U (en) | 2014-12-19 | 2014-12-19 | A kind of evaluating apparatus of self-healing cement self-healing capability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420816286.6U CN204330659U (en) | 2014-12-19 | 2014-12-19 | A kind of evaluating apparatus of self-healing cement self-healing capability |
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| CN204330659U true CN204330659U (en) | 2015-05-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502419B (en) * | 2014-12-19 | 2017-05-03 | 西南石油大学 | Device and method for evaluating self-healing capacity of self-healing cement |
| CN112129602A (en) * | 2020-09-15 | 2020-12-25 | 南京理工大学 | Concrete test piece for evaluating concrete water permeability, evaluation device and test method |
-
2014
- 2014-12-19 CN CN201420816286.6U patent/CN204330659U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502419B (en) * | 2014-12-19 | 2017-05-03 | 西南石油大学 | Device and method for evaluating self-healing capacity of self-healing cement |
| CN112129602A (en) * | 2020-09-15 | 2020-12-25 | 南京理工大学 | Concrete test piece for evaluating concrete water permeability, evaluation device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180702 Address after: 610500 room 1708, R & D building, Southwest Petroleum University, Xindu District, Chengdu, Sichuan Patentee after: Chengdu Southwest Petroleum University Petroleum Engineering Technology Co., Ltd. Address before: 610500 Xindu Road, Xindu District, Chengdu, Sichuan Province, No. 8 Patentee before: Southwest Petroleum University |
|
| TR01 | Transfer of patent right |