Winch heave compensation device of marine floating drilling platform

Abstract

The invention discloses a novel winch heave compensation device of a marine floating drilling platform. A differential planet gear train is adopted as a transmission mechanism for heave compensation of a winch; power from an active compensation motor and a passive compensation hydraulic motor is input from an outer gear ring; the power from a drilling motor is input by a sun gear; a planet carrier outputs power to drive a winch roller to move; a PLC (programmable logic controller) control unit controls the active compensation motor to drive the outer gear ring of a differential gear reducer to rotate based on the detected platform heave signal; the heave movement of the platform is compensated by driving the roller to rotate forwardly and reversely, and the drilling motor is controlled to drive the sun gear to rotate based on the detected drill pressure change signal so as to achieve automatic drilling movement. A pneumatic hydraulic convertor bears a part of static load of a drilling column through the passive compensation hydraulic motor; and the active compensation motor overcomes the other loads in the movement compensation process so as to reduce the energy consumption of the system and improve the compensation precision.

Description

Technical field: [0001] The invention relates to a heave compensation device for an offshore oil drilling drawworks, which is an electro-hydraulic combined driving device characterized by electro-hydraulic control technology. Background technique: [0002] With the depletion of onshore oil resources, the shallow sea oil development is close to saturation, and it has become an inevitable trend to develop resources into the deep sea. Therefore, marching into the deep-water field, challenging deep-water technology, promoting the localization of major equipment, and improving the level of my country's offshore oil technology and equipment are the material and technical basis for the implementation of going out to ask for oil from the deep sea. Working in deep water conditions has more stringent requirements on all aspects of the drilling rig, and the heave compensation system is one of the essential equipment to ensure the normal operation of the deep-sea floating drilling platf...

AI Technical Summary

Problems solved by technology

At present, the research on the drawworks compensation device has been carried out abroad, and some products have been launched. The main principle is to realize the active heave compensation function by increasing the motor power on the basis of the traditional drilling drawworks, so it has high installed power and low control accuracy. , the problem of huge energy consumption

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