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

Abstract

The invention discloses a dynamic detection technology for well control products and wellhead devices in a state of high and low temperature. The air temperature of an inside cavity for measured objects is heated to a rated high temperature of 60 DEG to 121 DEG or reduced to a rated low temperature of subzero 18 DEG to subzero 60 DEG, then the temperature is maintained at the rated temperature; a measured object is pressurized to the rated working pressure of 1 to 140 MPa, being repeatedly opened at least 20 times at the rated pressure; the temperature value and the pressure value are collected after the rated pressure stabilizing for 0.5 to 2 hours, then whether the quality and performance of the measured object is qualified is decided by fluctuations of the temperature value and the pressure value. The dynamic detection technology comprising pressure testing in high and low temperature conditions, then increasing or reducing the temperature of the measured object, after repeatedly opening in high and low temperature conditions, simulating the sealability of the measured object after multiple opens with low surrounding temperature and high medium temperature to simulating the practical working condition to decide whether the quality and performance of the measured object meets the requirements of the site use.

Description

technical field [0001] The present invention relates to a detection method of petroleum drilling and production equipment under high and low temperature conditions, in particular to a dynamic detection process of well control products and wellhead devices under high and low temperature conditions, mainly used for detecting control valves in petroleum drilling and production equipment . 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 we...

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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 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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