Deepwater well completion test electro-hydraulic seating string safety control device

Abstract

The invention discloses a deepwater well completion test electro-hydraulic seating string safety control device which comprises a multi-channel connecting and disconnecting device, a hydraulic shearing device, a hydraulic plugging device and an adaptive connector, and the hydraulic shearing device and the hydraulic plugging device are connected through the adaptive connector. A hydraulic oil channel, a chemical reagent injection channel and a power and monitoring cable channel are arranged in the device to achieve releasing, plugging, shearing, chemical reagent injection, electric power transmission and data monitoring of the device. According to the invention, the power and monitoring cable channel is arranged for power transmission and data monitoring of underground electronic equipment; the accuracy and controllability of releasing can be guaranteed by controlling annular releasing through the valve; the problem of non-uniform distribution of spring force is solved through the pump through hole; the adaptive connector is arranged, so that the distance adjustment and the number flexible configuration of the ball valves can be realized according to the operation requirements and the specifications of the blowout preventer group; the ball valve opening and releasing mechanism is interlocked, so that overflow and disconnection in the operation process are avoided; the hydraulic oil channels provide hydraulic control pipeline channels for the intelligent well completion tool.

Description

technical field [0001] The invention relates to the field of offshore oil and gas equipment, in particular to an electro-hydraulic seated string safety control device for deep-water well completion testing. Background technique [0002] For deep-sea oil, natural gas and gas hydrate (also known as "combustible ice") mining operations, deep-water well completion testing operations are an essential link. If the platform or drilling ship encounters typhoons, tides, tsunamis, etc. during this link Movements such as heave and shaking will occur, and the connected deepwater completion test string will move accordingly, causing deviation and bending. If the deflection and bending range of the completion test pipe string exceeds the warning range, the operation needs to be stopped immediately, and the platform sends out a control signal, so that the safety control device of the pipe string inside the underwater wellhead blowout preventer group blocks the underground high-pressure oil...

AI Technical Summary

Problems solved by technology

The drive mechanism of the ball valve has a simple structure and is easy to install, and the left valve seat of the ball valve and the right valve seat of the ball valve can wrap the ball valve better, which solves the problem that the sealing surface of the ball valve is easily damaged and easily eroded when the ball valve is in the open state. The problem of poor sealing and low reliability; the annular space release control valve can realize effective control of hydraulic oil, solve the problem of poor accuracy and controllability of annular space release, and even lead to major accidents caused by misoperation; The pump through hole can complete the well killing operation of the ball valve, and overcomes the problems such as the change of the pre-tightening force of the pump spring, the uneven force on the sealing surface of the ball valve, oil and gas leakage, and the misoperation of the positive pressure pump function; The replacement of the adapter connector solves the problem that the existing similar devices cannot flexibly adjust the distance between the two ball valve mechanisms to effectively meet the internal structure of different specifications and models of BOP groups and cannot quickly configure a single ball valve mechanism according to the needs of different completion operations. Or the problem of the string safety control device of the two ball valve mechanisms; the ball valve opening and the auxiliary connection channel increase the interlocking of the ball valve opening mechanism and the release mechanism at the connection, and use double-occlusion variable diameter rings to solve the problem when the ball valve is opened. , misoperation or connection failure at the connection, resulting in problems such as overflow at the connection and disconnection of the multi-channel connector; the power and monitoring cable channel and the in-line cable connector realize the connection between the system below and the downhole instrument tool. Power transmission and data monitoring, and quick plugging and unplugging of power cables and monitoring control signal lines in the process of uncoupling and reconnection; the hydraulic oil channels described above are more, which can provide sufficient quick disconnection and shutdown for intelligent well completion tools Automatically connect and open the hydraulic control pipeline, so that the present invention can meet more complex working conditions in the later stage

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