Device, system and method for detecting air impermeability of oil casing screw thread

Abstract

The invention discloses a device for detecting the air impermeability of an oil casing screw thread and a detecting method thereof. The device comprises a main clamping body, a left fan-shaped clamping body in rotatable and sealed connection to a side of the main clamping body, and a right fan-shaped clamping body in rotatable and sealed connection to the other side of the main clamping body. The left fan-shaped clamping body and the left fan-shaped clamping body are fixedly connected through a buckle switch. The inner wall of the detecting device is provided with a sealing elastic layer, and a gap between the left fan-shaped clamping body and the left fan-shaped clamping body is in sealed contact by means of a sealing adhesive tape. The main clamping body is provided with an air impermeability detecting device and a hydraulic clamping device for clamping the left fan-shaped clamping body and the left fan-shaped clamping body so that the inner wall of the detecting device and an oil casing are clamped. The detecting device and the detecting method are simple in operation and light in structure, solve the air impermeability detection of the oil casings with different sizes, and can be suspended from an oil derrick for easy field operation and remote control.

Description

technical field [0001] The invention relates to the technical field of an airtightness detection device for a threaded thread of an oil-casing connection part, in particular to a quick-assembled and disassembled air-tightness detection device, a detection system and a detection method for a threaded thread of an oil-casing pipe. Background technique [0002] my country's oil weather market is vast, and underground gas storage on oil fields has been widely used. Oil and natural gas are stored in underground gas storage, which has large reserves, a large overall pressure adjustment range, and low cost. However, compared with conventional production capacity construction The production well has higher requirements on the safety, integrity and air tightness of the wellbore, and the entire injection-production well runs for a long time. Due to the high pressure of the gas storage and the wide range of pressure changes in the operation of the injection-production well of the gas st...

AI Technical Summary

Problems solved by technology

Since the currently used air tightness detection devices are all built-in, the outer diameter of the air tightness detection device needs to be reduced accordingly to match the pipe diameter of the oil casing. If the air tightness detection device is small in size It is still necessary to maintain the original structure and realize the original functions, which will greatly increase the difficulty of processing and manufacturing.

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