Structural design method for locking guiding system of crown block compensation device

Abstract

The invention relates to a structural design method for a locking guiding system of a crown block heave compensation device. The method comprises the first step of overall scheme design, the second step of hydraulic supporting cylinder parameter design, the third step of hydraulic system loop design, the fourth step of hydraulic loop simulated analysis and the fifth step of guiding device design and strength analysis, wherein the overall scheme design comprises the following substeps that S1-1, the locking hydraulic loop design overall scheme is adopted, and a hydraulic cylinder, a hydraulic locking loop with a hydraulic control one-way valve, a three-position four-way reversing valve, an inner control and inner leakage direct moving type sequence valve and a one-way volume adjustable hydraulic pump are designed; and S1-2, the guiding device design overall scheme is adopted. The structural design method has the beneficial effects that two major parts including a hydraulic system loop design method and a guiding device design method are adopted, a hydraulic system loop and a guiding device are enhanced and improved, the stability problem that in the deep water well drilling operation process, due to environment impact loads, a piston of a compensation system plays is solved, and the stability and compensation efficiency of the crown block heave compensation device are improved.

Description

technical field [0001] The invention relates to the technical field of deepwater drilling operations, in particular to a structural design method for a locking and guiding system of a crane heave compensation device. Background technique [0002] The heave compensation device is an indispensable device system in marine operations, especially deepwater drilling operations. The research and application of heave compensation-related technologies started relatively late in China, and the research system of heave compensation devices and their supporting systems has not yet been perfected. At present, no relevant manufacturers in China can produce heave compensation devices and devices that meet the requirements of on-site use. Its supporting products lead to the heave compensation system used on the deep-water semi-submersible platform or drilling ship already owned by our country, which needs to be imported at a high price from abroad and bear huge maintenance costs. As my cou...

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Problems solved by technology

[0003] During the heave compensation movement of the crane, some drilling operations require the floating crown to be locked at a fixed height position, which is convenient for the operations such as making up and breaking out during the operation, but the floating crown may often be locked due to Stability problems arise due to movement caused by external factors after stopping. At the same time, during the heave compensation movement of the floating crown, because the power end adopts a mechanical drive method, the floating crown at the top of the drilling derrick will sway. It is not conducive to the smooth progress of the motion compensation process, so it is necessary to improve the original hydraulic cylinder in the crane compensation device and add a guide device

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