Mobile gas seal detection system applicable to oil field site

Abstract

A mobile gas seal detection system applicable to an oil field site. A seat sealing device is installed on a wellhead device and isolates the internal pressure channels of a wellbore and the wellhead device. A nitrogen generating vehicle supplies low-pressure nitrogen with qualified purity and a driving gas to a nitrogen pressurizing vehicle. The nitrogen pressurizing vehicle pressurizes or secondarily pressurizes the nitrogen input from the nitrogen generating vehicle, outputs high-pressure nitrogen, has a test function of water pressure, and provides power supply for the whole detection device. A central processing control cabinet is installed in an instrument vehicle, fully automatically controls the whole processes of pressure increase, pressure stabilization and pressure decrease, andrecords a test curve in real time. The mobile gas seal detection system has high structural integration degree and good maneuverability, and can perform field detection according to different wellheaddevice pressure testing processes, and is flexible and efficient.

Description

technical field [0001] The invention relates to the field of oil field exploitation, in particular to a mobile gas seal detection system on the oil field site. Background technique [0002] Oil (gas) trees, blowout preventers and other wellhead equipment are mainly used for fluid transportation and control of oil and gas wells, and are generally installed at the entrance of the production string. During the service process, it will be subjected to high pressure for a long time, and the temperature and pressure fluctuations are relatively significant, and it may also be corroded by gases such as hydrogen sulfide. If the gas seal of the wellhead equipment fails, it will not only affect oil and gas production, but also seriously threaten the safety of on-site staff and peripheral equipment, leading to catastrophic production accidents and seriously affecting the image and reputation of the company. The current method is mainly to test the wellhead device with water pressure or...

AI Technical Summary

Problems solved by technology

If the gas seal of the wellhead equipment fails, it will not only affect oil and gas production, but also seriously threaten the safety of on-site staff and peripheral equipment, leading to catastrophic production accidents and seriously affecting the image and reputation of the company

The current method is mainly to test the wellhead device with water pressure or nitrogen gas in the well control workshop to determine whether the wellhead device has insufficient pressure bearing capacity due to defects caused in the process of manufacturing and storage.

Such pressure test results do not mean that the actual wellhead will be reliable after installation.

The wellhead device after the pressure test in the workshop is actually reassembled when it is installed at the well site. If the on-site installation is unreasonable or the components of the wellhead device are damaged during transportation, problems such as unreliable sealing and insufficient pressure bearing capacity may be caused. lead to production accidents

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