Detecting process of well control product and well head apparatus under high temperature liquid state

Abstract

The invention discloses a detection technology for well control products and wellhead devices in conditions with high-temperature liquid medium, comprising steps as follows: a, heating heat conducting liquid to a rated temperature of 60 DEG to 151 DEG, injecting the heat conducting liquid to a measured object, then withdrawing the heat conducting liquid, stabilizing temperature of the heat conducting liquid through repeatedly injecting and withdrawing; b, pressurizing the measured object to a rated working pressure of 1 to 140 MPa and stabilizing the pressure for 0.5 to 2 hours, collecting the temperature and pressure values of the measured object, deciding whether the quality and performance of the measured object is qualified according to fluctuations of the temperature and pressure values, then reducing the pressure to 0 MPa, withdrawing the heat conducting liquid in the measured object and completing the detection. By first raising temperature, then carrying out pressure testing in liquid medium, the invention simulates the practical working condition to decide whether the quality and performance of the measured object meets the requirements of the site use, besides, the invention can detect the high-temperature-resistant sealing performance of well control products and wellhead devices and the high-temperature-resistant performance of non-metallic and metal materials.

Description

technical field [0001] The invention relates to a detection method of petroleum drilling equipment in a high-temperature liquid state, in particular to a detection process of a well control product and a wellhead device in a high-temperature liquid state. 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 of well control products and wellhead devices. However, the quality and performance of well control products and wellhead devices cannot b...

AI Technical Summary

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. Therefore, it is still impossible to know the situation of the blowout preventer in real time with the development of the drilling project, so there is still a big safety problem

[0003] At present, national standards, industry standards, API, and ISO standards all require well control equipment and wellhead devices to be tested for adaptability to high-temperature medium and low-temperature environments, but there is no testing equipment capable of implementing such tests in China, and only the United States and other countries abroad Few developed countries have test conditions, resulting in low reliability of well control products and wellhead devices, which greatly increases the incidence of safety accidents and reduces the safety during drilling

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