A cementing cement bonding strength testing device and method

A technology of cementing strength and cementing cement, applied in the field of drilling, can solve problems such as low accuracy of cementing strength test, and achieve the effect of solving the problems of low accuracy of cementing strength test, accurate cementing strength and avoiding mutual influence

Active Publication Date: 2019-03-12
PETROCHINA CO LTD
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  • Abstract
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Problems solved by technology

[0005] The embodiment of the present invention provides a cementing cement bonding strength testing device and method, which are used to solve the technical problem of low accuracy of bonding strength testing in the prior art and improve the accuracy of bonding strength testing

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  • A cementing cement bonding strength testing device and method
  • A cementing cement bonding strength testing device and method
  • A cementing cement bonding strength testing device and method

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Embodiment Construction

[0038] In the technical solution provided by the embodiment of the present application, through the collected accurate pressure value, the cementation strength of the cemented sample can be calculated, thereby accurately evaluating the cementation strength between the cement and the well wall (or casing), and avoiding the need to test the cementation strength The interaction between the surface of the inner ring and the surface of the outer ring solves the technical problem of low accuracy of the bond strength test in the prior art, and improves the accuracy of the bond strength test.

[0039] The main realization principles, specific implementation methods and corresponding beneficial effects that can be achieved of the technical solutions of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0040] Please refer to figure 1 , the embodiment of the present application provides a cement bond strength tes...

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Abstract

The invention discloses a device and a method for testing cementing strength of cementing cement. The device comprises a base, supports, a hydraulic power system, a pressure sensor, a support pillar, a retainer sleeve, a cementing barrel, a fixed baffle and a movable baffle, wherein the hydraulic power system is fixedly arranged at the middle part of the base; the pressure sensor is arranged at the bottom part of the hydraulic power system; the support pillar is arranged at the middle part of the upper plane of the hydraulic power system; the support pillar comprises a support pillar lower step and a support pillar bulge; the retainer sleeve is arranged on the support pillar lower step; the cementing barrel is arranged in the retainer sleeve; the support pillar bulge is arranged in the cementing barrel; the fixed baffle is fixedly arranged at the upper parts of the supports; the movable baffle is located below the fixed baffle and sheathes the cementing barrel; when the support pillar is pushed by the hydraulic power system to move upwards to push out set cement in the cementing barrel, a pressure acquisition system is used for acquiring a pressure value detected by the pressure sensor. Through the technical scheme, the technical problem that the testing accuracy of the cementing strength in the prior art is lower is solved, and the accuracy during cementing strength testing is improved.

Description

technical field [0001] The invention relates to the field of drilling technology, in particular to a cement bond strength testing device and method. Background technique [0002] During the drilling process, due to the permeability of the well wall and the solid phase substances such as bentonite in the drilling fluid, mud cakes will be formed on the well wall; during the cementing construction, the cement slurry is injected between the casing and the well wall In the annulus, the cement slurry finally solidifies under the high temperature and high pressure environment downhole to form a cement sheath with a certain cementing ability between the well wall and the casing. The cementation strength indicates the firmness of the cement and the well wall (or casing) . Therefore, the bonding strength between cement and well wall (or casing) is one of the main factors to ensure the quality of cementing. For this reason, it is particularly important to test the cement bond strengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
Inventor 唐世忠董云龙王晓彬吕照鹏王贺强梁新欣徐永强曹磊
Owner PETROCHINA CO LTD
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