Performance detecting process of well control product and well head apparatus under low temperature state

Abstract

The invention discloses a performance detection technology for well control products and wellhead devices in conditions with low surrounding temperature, comprising steps as follows: opening a low environment temperature box, reducing and stabilizing temperature to a rated temperature of subzero 69 DEG to subzero 29 DEG; then opening a pressure device, pressurizing a measured object to a rated working pressure of 1 to 140 MPa; stabilizing the pressure for 0.5 to 2 hours, then reducing the pressure to 0 MPa after a computer monitoring and control system deciding whether the quality and performance of the measured object is qualified according to fluctuations of the temperature and pressure values, increasing temperature to the normal value, then completing the detection. Through pressure testing in low temperature condition, reducing the temperature of the measured object and simulating the practical working condition to decide whether the quality and performance of the measured object meets the requirements of the site use, the invention can detect the low-temperature-resistant sealing performance of well control products and wellhead devices and the low-temperature-resistant performance of non-metallic and metal materials.

Description

technical field [0001] The present invention relates to a performance detection process of oil drilling and production equipment, in particular to a performance detection process of well control products and wellhead devices in a low-temperature environment, and is mainly applicable to the performance and quality of blowout preventers, wellhead devices, valves and other equipment detection. Background technique [0002] In the prior art, during the construction of oil and gas drilling projects, well control products and wellhead devices are operating in vibration every day, and are also subjected to various temperatures and pressures, so their performance is constantly changing. In order to ensure safe drilling Requirements, according to regulations, well control products and wellhead devices must be tested for performance after a period of use. At present, such testing not only consumes a lot of time, but also can only be carried out simply on the pressure bearing capacity ...

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Problems solved by technology

[0002] In the prior art, during the construction of oil and gas drilling projects, well control products and wellhead devices are operating in vibration every day, and are also subjected to various temperatures and pressures, so their performance is constantly changing. In order to ensure safe drilling Requirements, according to regulations, well control products and wellhead devices must be tested for performance after a period of use. At present, such testing not only consumes a lot of time, but also can only be carried out simply on the pressure bearing capacity of well control products and wellhead devices. However, the quality and performance of well control products and wellhead devices cannot be quantitatively evaluated. Therefore, there are still potential dangers in the future use of well control products and wellhead devices after factory testing.

At present, when testing the blowout preventer, when using water pressure or hydraulic pressure to pressurize the blowout preventer, a displacement testing instrument is installed on the upper end of the blowout preventer shell to detect when pressurization and before pressurization, The longitudinal displacement of the blowout preventer shell, and then compare the value of the displacement with the specified value, and if it is greater than the specified value, it is deemed that it cannot continue to be used

This detection method can detect the metal deformation of the blowout preventer shell in the factory environment. By testing the qualified blowout preventer in the factory in this way, the performance of the equipment is constantly changing in different environments and with time. changes, so it is still impossible to know the situation of the blowout preventer in real time with the development of the drilling project. Therefore, there is still a big safety problem, and the above detection can only be aimed at the blowout preventer

[0003] At present, national standards, industry standards, API, and ISO standards all require the adaptability test of low-temperature environment for well control equipment and wellhead devices of petroleum drilling and production equipment, but there is no testing equipment that can implement this test in China. Petroleum drilling and production equipment Low-temperature resistance sealing performance and low-temperature resistance performance of non-metallic and metal materials cannot be tested in low-temperature environment, and only a few developed countries such as the United States have test conditions abroad, resulting in low reliability of well control products and wellhead devices in use, which greatly Increased the incidence of safety accidents and reduced safety during drilling

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