On-line tester for plugging capability of water-base mud

Abstract

The invention relates to an on-line tester for plugging capability of water-base mud, which belongs to the technical field of instruments for testing the plugging capability of drilling mud. The tester consists of an experimental reactor, a heater, a servo motor, a data acquiring-processing device, a back pressure receiver, a gauge and a pressure control device, wherein the heater is arranged on the experimental reactor; one side of the experimental reactor is provided with the servo motor; a photoelectric displacement sensor is arranged on a motor bracket; the data acquiring-processing device is arranged below the motor; the back pressure receiver and the gauge are arranged below the experimental reactor; and the other side of the experimental reactor is provided with the pressure control device. The tester can integrate static water loss, mud-cake thickness, mud-cake strength of water-base mud filtrate in the drilling process of simulated high-temperature high-pressure thickness static test in order to comprehensively evaluate the plugging capability of the water-base mud in the drilling process. The tester solves the problem that the experimental test of the conventional tester for the properties and strength of mud cakes in the drilling process can be only limited to separate test. In addition, the tester has the advantages of simple structure, use convenience and applicability to online test for various types of drilling mud.

Description

Technical field: [0001] The invention relates to an online tester for plugging capacity of water-based mud, which belongs to the technical field of testing instruments for plugging capacity of drilling mud. Background technique: [0002] At present, the experimental test methods for the mud cake properties and mud cake strength formed by the use of water-based mud in the drilling process are still limited to individual test items, such as high temperature and high pressure static water loss test, and the penetration method under normal temperature and pressure to measure the mud cake thickness. , Measuring the strength of mud cake by water flushing method under normal temperature and pressure, and measuring the shear stress of mud cake by mechanical qualitative method. The above-mentioned test method needs several different test instruments to complete, the test data are not related to each other, the evaluation method cannot be unified, and the properties of the filter loss...

AI Technical Summary

Problems solved by technology

The above-mentioned test method needs several different test instruments to complete, the test data are not related to each other, the evaluation method cannot be unified, and the properties of the filter loss mud cake cannot be comprehensively and comprehensively evaluated; Insufficient attention has been paid to the factors affecting the plugging capacity, resulting in the lack of a comprehensive method for online measurement of lost water cake quality under the conditions of integrated simulation of high temperature and high pressure

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