Retractable device for a subsea drilling rig

Abstract

The invention discloses a seabed drilling rig retracting device. A supporting mechanism is fixed to a rear deck of a mother ship, a drilling rig bracket is hinged to oil cylinder supporting bases in the supporting mechanism, two retracting oil cylinders are hinged to the two parallel oil cylinder supporting bases respectively, and the drilling rig bracket can rotate by 90 degrees under the driving of the retracting oil cylinders. A V-shaped opening is formed in a beam impact resisting mechanism on the drilling rig bracket, a plate turning mechanism is hinged to the beam impact resisting mechanism on the drilling rig bracket, the plate turning mechanism on the drilling rig bracket can be opened and closed, two clamping blocks can be driven to move by driving two plate turning and clamping oil cylinders respectively, and thus the plate turning mechanism can be clamped and loosened. Two beam guide hook assemblies in a beam guide hook mechanism on the drilling rig bracket can swing clockwise or anticlockwise around a fixed shaft by a certain angle under the driving of two beam guide hook oil cylinders. Through the seabed drilling rig retracting device, a seabed drilling rig can be retracted more safely and reliably in the whole process, and the seabed drilling rib retracting device further has the advantages of being simple and compact in structure, and convenient to operate, control and manufacture.

Description

technical field [0001] The invention relates to a retractable device for a seabed drilling rig. technical background [0002] The submarine drilling rig is the key technical equipment necessary for carrying out marine geological and environmental scientific research, marine resource exploration and submarine engineering geological survey. The retractable device is an important supporting equipment of the subsea drilling rig, and a reliable retractable device can greatly improve the safety and efficiency of the subsea drilling rig operation. Especially for heavy-duty subsea drilling rigs, the design of a reliable retractable device cannot be ignored. [0003] At present, in the recovery process of the traditional subsea drilling rig, the subsea drilling rig is lifted out of the water surface through the cables on the mother ship, and then the A-frame of the mother ship is controlled to slowly recover inward, so that the subsea drilling rig is attached to the retractable devi...

AI Technical Summary

Problems solved by technology

[0004] During the retraction process of the submarine drilling rig, due to the influence of the waves, the hull will sway. When the submarine drilling rig retracting device with this structure is used to recover the submarine drilling rig, the following situations will occur: (1) Control the submarine drilling rig to retract (2) When controlling the alignment and closeness of the subsea drilling rig to the retracting device, it is necessary to lift the subsea drilling rig out of the water first, resulting in an increase in the swing of the subsea drilling rig with the mother ship. There is no anti-shock equipment installed on the surface of the subsea drilling rig, so that the impact deformation of the subsea drilling rig is relatively large; (3) Since the subsea drilling rig and the retractable device are not fixed together, the subsea drilling rig is still in a swaying state during the entire recovery process, so there is It may hit the retractable oil cylinders on both sides of the retractable device, resulting in damage to the retractable oil cylinders, and then the failure of the entire retractable process

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