Winch heave compensation device for ocean floating drilling platform

Abstract

The invention relates to a winch heave compensation device for an ocean floating drilling platform. The device comprises an active compensator and a passive compensator which are arranged on one side of a winch in parallel. The active compensator comprises a first single-rod piston cylinder with a piston rod stretching upwards and a force transducer, wherein two chambers of the first single-rod piston cylinder are connected to a hydraulic system through a three-position four-way magnetic exchange valve, and the force transducer is used for detecting force on a steel wire rope and electrically connected with a force feedback controller which controls exchange actions of the three-position four-way magnetic exchange valve. The passive compensator comprises a second single-rod piston cylinder with a piston rod stretching upwards. Tops of the piston rods of the first piston cylinder and the second piston cylinder are connected onto a movable pulley, a fixed pulley is further arranged on the drilling platform, and the steel wire rope on the winch is connected with a crown block and a traveling block after bypassing the movable pulley and the fixed pulley sequentially. According to the device, the compensation effect that active compensation and passive compensation are mutually synchronous and promoted can be achieved.

Description

technical field [0001] The invention relates to a heave compensation device on an ocean floating drilling platform for ensuring that the drill string does not move up and down with the heave movement of the hull during the drilling process, in particular to a heave compensation device for a drawworks of the ocean floating drilling platform . Background technique [0002] With the increasing demand for oil and natural gas in countries around the world, the exploration and development of oil has expanded from land to deep sea and ultra-deep sea, and the difficulty of exploration and development has also increased. In the process of deep sea development, the offshore floating drilling platform will produce heave and other motions with the irregular motion of the waves, which will cause the drill string to heave with the hull, which will have a serious impact on underground construction and even lead to the failure of drilling operations. Therefore, in order to ensure the smoot...

AI Technical Summary

Problems solved by technology

The heave compensation device between the traveling block and the hook, and the heave compensation device installed on the crown block are all suspended at a higher position, with a higher center of gravity, heavy weight, and direct connection with the drill string, so it is difficult to guarantee safety and reliability. Difficult to install, difficult to maintain, maintenance will also affect the overhead crane and traveling train system; and the heave compensation device installed on the dead rope is mainly active compensation, which consumes a lot of energy

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