Air-tight sealing detection apparatus of threaded connection of oil casing tubes

Abstract

The invention, which belongs to the field of petroleum and gas engineering and gas storage, discloses an air-tight sealing detection apparatus of threaded connection of oil casing tubes. The air-tight sealing detection apparatus comprises a liquid-gas power system, a detection gas source system and a detection execution system. The detection gas source system includes a booster energy storage device and a detection gas source. The detection execution system includes a detection tool, a gas collection sleeve and a leakage detection instrument; the detection tool includes a detection body, at least one central tube and a packer rubber sleeve; and a gas outlet valve is installed at the detection body. When detection is carried out, the detection gas enters a to-be-detected oil casing tube; and when detection is complete, the packer rubber sleeve is delocked and the detection gas is exhausted by an annulus cavity. The operation is convenient and the technology is reliable. Moreover, leakage data recorded by the leakage detection instrument can predict unsealed thread timely, thereby effectively removing the leaked thread. The secure guarantee can be provided for field detection of sealing of the oil casing tube; the massive loss caused by thread leakage can be avoided; and the long-time stable exploitation of gas well can be ensured.

Description

technical field [0001] The invention relates to the fields of petroleum and natural gas engineering, gas storage and the like, in particular to a gas seal detection device for threaded connections of oil and casing pipes. Background technique [0002] With the continuous promotion of deep well and horizontal well exploration and development technology, as well as the large-scale development of natural gas and gas storage, the sealing requirements for oil and casing are getting higher and higher. In order to ensure the sealing of the oil casing in the well, especially some high-pressure gas wells, H 2 S well, CO 2 Wells, gas injection wells or wells in densely populated areas, gas storage wells, etc., the tightness of the oil casing is particularly important. [0003] Due to factors such as processing tolerances of tubing and casing, bumps during transportation, micro-corrosion, etc., especially in the process of downhole tubing and casing operations in high-pressure gas we...

AI Technical Summary

Problems solved by technology

However, at present, there is no oil-casing thread connection air-tight detection device specially used for detecting the tightness of the oil-casing thread in the domestic market.

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