An offshore drilling platform riser filling valve control system and usage method

Abstract

The invention provides a water-secluding pipe filling valve control system for a marine drilling platform. The water-secluding pipe filling valve control system comprises a balance valve, a control valve, a lock valve, a change-over valve, an energy accumulator and a drive oil cylinder, wherein the control valve separately communicates with the balance valve and the lock valve through oil tubes; the change-over valve separately communicates with the lock valve, the energy accumulator and the drive oil cylinder; and the control valve is additionally equipped with a remote control interface, and the control valve communicates with an external hydraulic control source through the remote control interface. A using method for the water-secluding pipe filling valve control system comprises five steps of system initialization, system pressure drop, filling valve opening, opening keeping and filling valve closing. The system provided by the invention is simple in structure, is high in fault resistance, is various and flexible in control way, and is good in operation stability and interference resistance, so that automation degree, reliability and stability of filling valve operation are improved, and the defects such as low filling valve control speed and low implementation precision as a result of balance valve pressure difference in a conventional control system are effectively solved, and therefore, control precision of the water-secluding pipe filling valve control system is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of an injection valve control system, in particular to an ocean drilling platform riser injection valve control system and a use method. Background technique [0002] At present, in the deep-sea drilling construction process, the injection valve is one of the main equipment to protect the drilling equipment and pipelines, and its application range is very wide. However, in the specific use of the current injection valve, its operation mainly depends on balance The pressure difference between the inside and outside of the valve is used as the drive control signal to control the filling valve. During use, it is found that once the balance valve is blocked due to mud and other debris, it will cause the control of the filling valve to fail, resulting in filling The operation reliability of the valve is poor. At the same time, when the pressure difference between the inside and outside of the balance valve is small, i...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of deep-sea drilling, the filling valve is one of the main equipments for protecting drilling equipment and pipelines. It has a wide range of applications. The pressure difference between the inside and outside of the valve is used as the driving control signal to realize the control of the filling valve. In use, it is found that once the balance valve is blocked and damaged by mud and other debris, the control of the filling valve will fail, resulting in filling The operation reliability of the valve is poor. At the same time, when the pressure difference between the inside and outside of the balance valve is small, the control will also fail. The perfusion valve operating state control and monitoring capabilities are low, and the control execution accuracy is low, which leads to the fact that the current perfusion valve can no longer effectively meet the needs of actual use. To solve this problem, it is urgent to develop a perfusion valve device with intelligent control operation. It is easy to meet the needs of practical use.

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