Bearing strength experiment instrument of high-temperature high-pressure mud cake plugging

Abstract

The invention provides a tester for the bearing and plugging strength of a mud cake under high temperature and high pressure, which can simulate the static conditions in a well and test the invasion depth of slurry filter liquid, bearing strength of mud cake, plugging and bearing strength against cracks in drilling for oil (gas) wells. The tester essentially comprises a mud-cake performance evaluation and test vessel assembly, a pressure pipe system, a temperature control system, a displacement record system, an automatic cleaning system and a computer data processing system. The tester allows all-sided simulation of the temperature, pressure and stratum features (seepage) under a well, determination the plugging and bearing strength of mud cakes, optimization of drilling fluid, rapid and safe drilling, therefore the tester is of a very wide application prospect.

Description

technical field [0001] The invention relates to a petroleum drilling scientific research experiment instrument in the field of petroleum engineering exploration and development, a high-temperature and high-pressure mud cake plugging pressure-bearing strength test instrument, more specifically, relates to testing oil (gas) well drilling in a laboratory environment by simulating static downhole conditions During the process, the drilling fluid filtrate invades the sandstone depth, mud cake bearing strength, fracture plugging and bearing strength experimental equipment. Background technique [0002] At present, there are few indoor test methods and instruments for mud cake properties, mud cake crack plugging and pressure bearing under high temperature and high pressure conditions, and the measurement instruments have single functions. There is no integrated equipment that can simulate formation conditions to measure mud cake filtration performance (such as Filtrate intrusion de...

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Problems solved by technology

[0007] The present invention proposes a high temperature and high pressure mud cake plugging pressure bearing strength tester in order to solve the shortcomings of the existing measuring instruments in the field that they cannot simulate the downhole conditions under high temperature and high pressure for real-time measurement and real-time data recording. It can simulate the downhole static conditions and test the mud filtrate intrusion into the simulated rock bed depth, mud cake bearing strength, different size fracture plugging and bearing strength change experiments during the drilling process of oil (gas) wells, and realize real-time recording of experimental data

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