A remote automatic core change and sealing real-time monitoring coiled tubing blowout preventer

Abstract

The invention relates to a coiled pipe blowout preventer box for remote automatic core replacement and sealing real-time monitoring, which includes a coaxial drive sliding sleeve, an upper sealing mechanism, a lower sealing mechanism, a fluid sealing mechanism in a well, a stepping servo hollow shaft motor, a wireless Electromagnetic wave control system. Among them, the upper sealing mechanism and the lower sealing mechanism are respectively installed on the upper end and the lower end of the coaxial drive sliding sleeve, the fluid sealing mechanism in the well is installed on the neck of the connecting flange, and the wireless electromagnetic wave control system controls the stepping servo hollow shaft motor to achieve coaxial The drive sliding sleeve is raised and lowered in the blowout prevention box, and a pressure sensor is installed on the coaxial drive sliding sleeve, and the blowout prevention box is connected with the lower wellhead device through the connecting flange. The beneficial effect of the present invention is that the maintenance and replacement of the sealing rubber core is more convenient; setting two sealing structures enhances the anti-blowout sealing performance; realizing real-time monitoring and early warning of rubber core wear and leakage; and setting an automatic sealing mechanism, After the coiled tubing is taken out of the wellhead, the return channel of the downhole high-pressure fluid can be automatically blocked.

Description

technical field [0001] The invention relates to the field of coiled tubing operations, in particular to a remote automatic core change and sealing real-time monitoring coiled tubing blowout prevention box. Background technique [0002] Because of its advantages and application value such as under-balanced operation under pressure, fast and efficient operation, low damage to the formation, and lower operating costs due to simplified procedures, coiled tubing operations are widely used in the exploration and development of fossil resources. It is playing an increasingly important role, which is embodied in the wide application of coiled tubing operations in oil and gas field workover, drilling, well completion, well logging and other fields, as well as in the field of underground coal gasification. A blowout preventer box must be installed to ensure a good seal between the coiled tubing and the wellhead during operation. After the coiled tubing is taken out of the well, the bl...

AI Technical Summary

Problems solved by technology

The present invention is designed with two sealing structures, the upper sealing structure and the lower sealing structure, which solves the problem of too few sealing structures of the existing coiled tubing blowout prevention box, and can ensure that the coiled tubing operation is under a relatively high working pressure condition. sealing effect

In the present invention, a fluid sealing structure in the well is provided at the connecting flange. When the coiled tubing in the well is taken out and injected into the wellhead device, the fluid sealing structure in the well can block the return passage of the high-temperature and high-pressure fluid remaining in the wellhead device to ensure smooth operation. Safe, solves the problem that the existing coiled tubing blowout preventer does not have this function

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