Hydraulic automatic leveling system and leveling method of seabed drilling rig

Abstract

The invention relates to a hydraulic automatic leveling system and a hydraulic automatic leveling method for a seabed drilling machine. The leveling system comprises support plates, large arms, chains, hydraulic cylinder legs, a base and a hydraulic system, wherein the base supports the drilling machine, and is connected with the hydraulic cylinder legs; the large arms are connected with the hydraulic cylinder legs, the base and the support plates; and the support plates are in contact with a seabed surface. The leveling method comprises the following steps of: selecting mutually vertical axes X and Y on the base, arranging double-axis tilt sensors along the axis X or Y, measuring inclination angles in two coordinate axis directions by using the double-axis tilt sensors, performing amplification, filtration and isolation by using a signal conditioning module, transmitting conditioned signals to data acquisition equipment and a computer, performing digital-to-analogue conversion and amplification after the signals pass through a signal analysis module, and outputting three paths of current to drive the motions of valve elements of three proportional reversing valves, control the flow of the system and drive the three hydraulic cylinder legs to ascend by y1, y2 and y3 to realize leveling. The system and the method are applied to kinds of offshore drilling equipment, and are highin leveling speed and accuracy.

Description

technical field [0001] The invention relates to a leveling system and a leveling method in integrated equipment for conical exploration and drilling on the seabed, in particular to a hydraulic automatic leveling system and a leveling method for a seabed drilling rig. Background technique [0002] The seabed drilling rig is a development trend of marine core drilling. As one of the key parts of the core drilling rig, the design of the leveling system will determine the overall performance of the drilling rig. However, the complex seabed topography is likely to cause the drilling rig to sit on the seabed obliquely. Therefore, it is necessary to monitor the inclination angles of the drilling rig base in the positive X and Y directions in real time and make corresponding adjustments to ensure that the drilling rod or probe rod is vertical. into the sea mud. [0003] At present, my country's representative submarine drilling rigs include my country's first deep-sea shallow strat...

AI Technical Summary

Problems solved by technology

The three-point support uses three leveling support legs, which can easily realize the automatic adjustment of the platform, but because there are few support points, its stability and anti-overturning ability are poor, but increasing the span between the support points can solve this problem

Although the four-point and six-point leveling supports are reliable and have strong anti-overturning capabilities, they have the problem of static instability, which is prone to "virtual legs". The higher the number of static uncertainties, the more complicated the control system

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