Introduction

Survey vessels operating at sea are subject to heave and sway due to wave motion. Therefore, a seabed heave compensation system is required to prevent the heave from being pulled up and to maintain a certain tension in the wire rope of the heave winch. When the survey vessel rises due to waves, the wire rope automatically extends to maintain a certain tension. When the workboat descends, the wire rope automatically tightens to maintain a certain tension, ensuring that the heave rests steadily on the seabed.

The seabed heave compensation system primarily consists of two compensation units. Each unit comprises a gas-liquid accumulator, a compensation hydraulic cylinder, a high-pressure working gas cylinder, and a hydraulic valve block. Hydraulic power is provided by a compensation hydraulic station, and high-pressure compressed air is supplied by a backup gas cylinder. This system typically utilizes the backup gas cylinder and compensation hydraulic station in the survey vessel's drill string heave compensation system.

Base Plate Winch Compensation Device

The subsea base wave compensation system primarily consists of two compensation units, each consisting of a gas-liquid accumulator, a compensation hydraulic cylinder, a high-pressure working gas cylinder, and a hydraulic valve assembly. Hydraulic power is provided by a compensation hydraulic station, while high-pressure compressed air is supplied by a backup gas cylinder. This system typically utilizes the backup gas cylinder and compensation hydraulic station from the survey vessel's drill string heave compensation system.

Technical Parameters

Functions and Features

• Automatically adjusts to meet compensation requirements.

• Simple structure and layout, compact installation space, making it ideal for survey vessels with limited space.

Application Examples