Coupling recognition system for snubbing oil tube tripping operation

Abstract

The invention belongs to the technical field of snubbing operation, and discloses a snubbing tubing tripping operation coupling recognition system which comprises a coupling recognition device, and the coupling recognition device comprises a cleaning module and a diameter measuring module; the cleaning module comprises a base, a planetary outer gear rotationally mounted on the base and an intermediate gear rotationally mounted on the base, a plurality of vertical shafts are arranged on the intermediate gear, planetary inner gears meshed with the planetary outer gear are rotationally mounted on the vertical shafts, and scraping plates are mounted on the planetary inner gears; the planetary outer gear is connected with the first driving unit, and the intermediate gear is connected with the second driving unit. According to the oil pipe coupling detection device, the cleaning module and the diameter measurement module are combined, the cleaning module scrapes impurities on the pipe wall, the precision of the diameter measurement module can be improved, accurate prediction of the position of an oil pipe coupling is achieved, and safety risks caused by measurement errors of a traditional coupling detection device are thoroughly eliminated.

Description

technical field [0001] The invention belongs to the technical field of snubbing operation, and in particular relates to a coupling recognition system for snubbing and tripping tubing operations. Background technique [0002] Gas well snubbing operation is a high-risk operation. Once blowout, leakage and other accidents occur, it will cause great harm to personnel safety. The identification of working conditions in the wellbore is an important means to ensure the safety of gas well snubbing operation. The detection methods of tubing and casing collars mainly include contact detection method, electromagnetic detection method and manual estimation method. The contact detection method is widely used in the detection of tubing couplings in well workover operations, and has also achieved good results. [0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: using the coupling detection device al...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: using the coupling detection device alone to predict the tubing coupling, due to the complex downhole environment, high temperature and high pressure, and the possible presence of oil, silt and scrap metals, etc. Interference factors will greatly affect the accuracy of the detection device, resulting in false alarms from the coupling detection device, thereby opening the BOP ram at the wrong time, increasing unnecessary working time, reducing work efficiency, and may cause oil pipe failure. The coupling directly hits the blowout preventer ram, causing the blowout preventer seal to fail or even be destroyed, resulting in high-pressure oil and gas leakage, which seriously threatens the safety of on-site operators

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