Shaft leakage detecting device used for continuous coiled tube drilling

Abstract

The invention discloses a shaft leakage detecting device used for a continuous coiled tube. The shaft leakage detecting device comprises an underground leakage finding short joint and a coiled tube. The underground leakage finding short joint is connected with other underground equipment at the tail end of the coiled tube, and the underground leakage finding short joint comprises a short joint body, at least one sensor set, a circuit system and an RFID tag reading coil. The RFID tag reading coil is installed on the inner wall of the short joint body and is connected to the sensor set through the circuit system, the sensor set is used for obtaining corresponding parameters of the environment where the sensor set is located, and the circuit system is used for controlling the sensor set to be started and storing the environment parameter data read by the sensor set when the RFID tag reading coil reads an RFID starting tag carrying a starting order. The shaft leakage detecting device is easy to operate, high in reliability and low in cost.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to wellbore leak detection equipment used for coiled tubing drilling. Background technique [0002] Lost circulation is a frequent accident in oil and gas drilling engineering, that is, during the drilling process, the drilling fluid or other media in the wellbore leak into the formation pores, fractures and other spaces. Severe lost circulation will lead to pressure drop in the well, causing wellbore instability, inducing formation fluid to pour into the wellbore and blowout; at the same time, lost circulation will seriously pollute the oil and gas layers, thereby affecting oil and gas production. The key to the plugging work is to find lost circulation in time and determine the position of the lost zone as soon as possible and accurately, so as to take effective plugging measures in time. [0003] Currently widely used methods include: isotope leak detection, logging leak de...

AI Technical Summary

Problems solved by technology

Logging to find leaks usually requires tripping out the empty well, drilling the well if necessary, and running in professional equipment for measurement and analysis to find leaks. The operation period is long and the cost is high

Packer leak detection requires multiple setting seals, generally mechanical packers cannot be used, and the packer is fragile. Although the leak point can be found accurately, it requires high operation

Therefore, there is a lack of an easy-to-operate, low-cost, high-reliability leak-finding technology during the drilling process.

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