Oil bushing air-tightness detection device and oil bushing air-tightness detection method

Abstract

The invention discloses an oil bushing air-tightness detection device and an oil bushing air-tightness detection method, which belong to the technical field of the detection of an oil bushing. The upper end of a central pipe of a lower intermittence compensation mechanism is in communication connection with an upper connector, the lower end of the central pipe of the lower intermittence compensation mechanism is sealed through a lower connector, the side wall of the middle part of the central pipe is provided with a side hole, a connection sleeve is respectively sleeved outside an upper compression piston mechanism and a lower compression piston mechanism, so that a gap leveled to the side hole is arranged between the upper compression piston mechanism and the lower compression piston mechanism, the upper end of the central pipe is provided with an adjusting nut, an upper rubber sleeve is arranged between the upper compression piston mechanism and the adjusting nut, and a lower rubber sleeve is arranged between the lower compression piston mechanism and the lower connector. According to the oil bushing air-tightness detection device and detection method, the air tightness of the oil bushing can be conveniently and rapidly detected, and a novel detection way is provided for more accurately judging the air tightness of the oil bushing.

Description

technical field [0001] The invention relates to the technical field of oil and casing sealing detection technology, in particular to a detection technology for threaded air tightness of oil and casing pipes in oil and gas exploration and development. Background technique [0002] With the continuous promotion of exploration and development technologies such as deep wells and horizontal wells, oil and gas exploration and development are gradually expanding to deeper reservoirs. During the production process, the wellhead pressure has exceeded 50MPa, and some wellhead pressures have even reached nearly 100MPa. For safe production, various oil and gas fields have higher and higher requirements for the tightness of oil and casing used on site. [0003] Due to factors such as processing errors, bumps and micro-corrosion during transportation or operation, selection and use of sealing grease, rotation of the make-up torque value range, cleaning of threads and sealing surfaces, etc...

AI Technical Summary

Problems solved by technology

[0004] At present, the gas-tightness detection methods of downhole tubing are still very weak, and the gas-tightness of tubing and casing is mainly tested through hydrostatic pressure sealing performance test experiments. These methods mainly rely on the work experience and operational sensitivity of operators, thus increasing Economical and management costs. At the same time, labor intensity is high, work efficiency is low, and detection quality is unstable. It is difficult to apply to the high requirements of oil and gas exploration and development sites for the tightness of tubing and casing.

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