Heave compensation device based on hydraulic machinery and scheme thereof

Abstract

The invention discloses a multi-level combined offshore drilling heave compensation device based on machinery and hydraulic. The multi-level combined offshore drilling heave compensation device comprises a middle supporting frame (3), a spherical bearing (4), an upper connecting rod B (5), an upper hinge (6), an upper connecting rod A (7), a hydraulic actuating rod (8), a hydraulic cylinder (9), a spherical bearing (10), an upper supporting frame (11), a lower connecting rod A (12), a lower hinge (13), a lower connecting rod B (14), a spherical bearing (15) and a lower supporting frame (16). A hydraulic-gas-liquid energy accumulator system comprises a gas-liquid energy accumulator (17), an industrial-control computer system (18), a hydraulic oil pump (19), a hydraulic oil-pipe control valve (20), a pressure sensor (23) and a platform other sensor (24). The multi-level combined offshore drilling heave compensation device based on machinery and hydraulic has the advantages that compensation structures are vertically arranged side by side, the compensation distance is long, the life is long and the working is stable; and active compensation and inactive compensation are mixed to use, the compensating precision and low energy consumption are ensured, and complicated sea conditions can be handled.

Description

technical field [0001] The present invention relates to a mechanical and hydraulic based multi-stage combination offshore drilling heave compensation device and its scheme Background technique [0002] In the process of offshore drilling and oil production, the platform is subject to loads such as wind, waves, and currents, and will undergo six-degree-of-freedom movements such as heave, surge, and sway, among which heave motions have the greatest impact on drilling and oil production operations. Heave motion is the up and down movement of the platform relative to the sea surface. When the platform is in offshore drilling operations, tensioning operations, hoisting operations, or encounters large waves, it will produce severe heave movements, resulting in large fluctuations in the load of the hook on the drill string system, which will affect the drilling of the drill bit at the bottom of the well. In severe cases, the drill bit may even be damaged or break away from the bot...

AI Technical Summary

Problems solved by technology

Active compensation has the highest accuracy and relatively simple structure, but consumes more energy; semi-active compensation has the second highest accuracy and consumes less energy, but its structure is generally complicated and requires a special crane system; passive type does not consume energy at all and relies on mechanical structures Compensate for it, but it is difficult to solve low-frequency motion, the accuracy is poor, and there are fewer applications

At present, the power of the active and semi-active compensation systems mostly comes from the hydraulic system, but in the past systems, only a few hydraulic cylinders were often designed, resulting in a single hydraulic cylinder with high pressure and prone to leakage problems; at the same time, it can Although the rotating hydraulic system has a large compensation distance, the hydraulic cylinder must use flexible hydraulic pipes, which increases the possibility of damage; the hydraulic cylinder must withstand the lateral vibration generated during rotation, which reduces its service life

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