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Mud cake performance comprehensive evaluation method and device

A comprehensive evaluation and mud cake technology, which is applied to measurement devices, optical devices, flow characteristics, etc., can solve the problem of inability to evaluate comprehensive performance of mud cakes, and achieve the effects of simple and reliable structure, comprehensive performance evaluation, and simple and effective methods.

Active Publication Date: 2011-02-02
CHINA NAT OFFSHORE OIL CORP +1
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AI Technical Summary

Problems solved by technology

Although these testing instruments can measure the adhesion coefficient, viscosity coefficient, thickness, and strength of the mud cake, they cannot make a comprehensive evaluation of the comprehensive performance of the mud cake based on the test results.

Method used

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  • Mud cake performance comprehensive evaluation method and device

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Experimental program
Comparison scheme
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Embodiment Construction

[0067] The present invention is a kind of mud cake performance comprehensive evaluation method, comprises the following steps:

[0068] (1) Select one of the mud cakes to be tested in the same batch as the pressured mud cake, and the other as the unloaded mud cake, and place the two mud cakes on the linked rotating tray at the same time. The same batch of mud cakes are subjected to no-load and pressure rotation tests respectively, and the relationship between strength, quality, viscosity and other parameters and their mutual influence can be obtained respectively.

[0069] (2) Apply a set pressure to the pressurized mud cake, and measure and record the thickness and mass of the pressurized mud cake and the unloaded mud cake. Due to the different dehydration conditions of the mud cakes during the filtration process, the quality and thickness of the same batch of mud cakes will have certain differences.

[0070] (3) Slowly start the linked rotating tray at the same time, and gr...

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Abstract

The invention provides a mud cake performance comprehensive evaluation method, which comprises the following steps: (1) placing a loaded mud cake and an unloaded mud cake on a rotating tray; (2) applying a pressure onto the loaded mud cake, and recording the thickness and quality of the loaded mud cake and the unloaded mud cake respectively; (3) starting a linked rotating tray, and increasing therotation speed gradually; (4) recording an unloaded throwing rotation speed; (5) increasing the rotation speed till the loaded mud cake is thrown out from the tray, stopping the rotating tray, and recoding a loaded throwing rotation speed; and (6) evaluating the performance of the mud to be tested comprehensively according to the thickness and quality of the loaded mud cake and the unloaded mud cake, the unloaded throwing rotation speed, the loaded throwing rotation speed and set parameters. The method of the invention is simple, effective and highly maneuverable. In addition, the invention also provides a mud cake performance comprehensive evaluation device using the method.

Description

technical field [0001] The invention relates to a mud cake performance comprehensive evaluation method and device. Background technique [0002] The mud cake of the drilling fluid plays an extremely important role in controlling the fluid loss of the drilling fluid and maintaining the stability and lubrication of the wellbore. [0003] At present, the testing instruments for high-temperature and high-pressure mud cake of drilling fluid include: adhesion coefficient tester and viscosity tester for evaluating mud cake lubricity, thickness tester for evaluating mud cake thickness, and penetration test for evaluating mud cake strength instrument. Although these testing instruments can measure the adhesion coefficient, viscosity coefficient, thickness, and strength of the mud cake, they cannot make a comprehensive evaluation of the comprehensive performance of the mud cake based on the test results. Since the selection and performance of the mud cake do not directly depend on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01B11/06E21B49/00G01N11/00
Inventor 孙强李自立张兴来耿铁罗健生吕维军苗海龙邓义成陈忠华王健冀腾田荣剑徐博韬刘刚张伟刘兆华
Owner CHINA NAT OFFSHORE OIL CORP
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