PASSIVE TYPE DEEP SEA HEAVE COMPENSATION DEVICE FOR OCEAN PLATFORM DRILLING

摘要

Disclosed is a passive type deep sea heave compensation device for ocean platform drilling. A vertically arranged guide slot is formed in a drilling derrick (3); a vertically arranged spring (5) is fixedly arranged at the top of the guide slot; a pressing plate (6) located in the guide slot is fixedly arranged at the bottom of the spring (5); a floating overhead crane (7) is located right under the pressing plate (6); and a center grooved wheel (8) provided with multiple wire ducts on the column surface thereof is mounted in the floating overhead crane (7) in a rotatable manner. The deep sea heave compensation device further comprises a large hook (9), a riser (10), a large hook lifting cable (11), a steel cable (12) and a displacement compensation mechanism I and a right displacement compensation mechanism II are respectively arranged on the left and right sides of a frame (2). The displacement compensation mechanism I and the right displacement compensation mechanism II are symmetrically disposed on the left and right. The present device has the advantageous effects of simple structure, capability of vertically dropping down the riser, high reliability, high compensation efficiency and high system response speed.