Switching device of submarine drill machine power head and wire line coring system

Abstract

The invention provides a switching device of a submarine drill machine power head and a wire line coring system, and belongs to the technical field of well drilling equipment. The switching device of the submarine drill machine power head and the wire line coring system comprises a power head, a wire line coring system, a sliding frame and a sliding oil cylinder. The sliding frame is fixed to a mast of a drill machine, and a slide rail arranged horizontally is arranged on the sliding frame; the power head is mounted on the slide rail, and the power head forms an integrated structure through a connecting plate and the wire line coring system; the sliding oil cylinder is fixedly mounted on the sliding frame, the tail end of a telescopic arm of the sliding oil cylinder is connected with the power head, the power head moves horizontally along the slide rail under driving of the sliding oil cylinder, and switching of the power head and the wire line coring system at the well opening position is achieved. By adopting the switching device, automatic switching of the power head and the wire line coring system and automatic operation of breaking away from clamping of a core barrel and a fisher are achieved, therefore the wire line coring technology can be applied to submarine deep-hole drill machines, and the purposes that auxiliary operation time is shortened, and the working efficiency and the quality of cores are improved are achieved.

Description

technical field [0001] The invention relates to a subsea drilling rig, in particular to a switching device for a power head and a cable coring system of a subsea drilling rig, and belongs to the technical field of drilling equipment. Background technique [0002] In the field of drilling technology, there are two solutions for core extraction and wireline coring. Among them, the core extraction solution has a relatively simple structure, good reliability, and is easy to realize automatic control, so it is widely used in subsea drilling rigs ; When the drilling depth is deep, the rope coring scheme can reduce the auxiliary operation time, and the operation efficiency is high. At the same time, the wall protection effect on the hole wall is better, and the core quality is better. Large size and poor reliability, especially for seabed core sampling drilling operations, because it is difficult to realize the automatic operation of switching between the power head and the wirelin...

AI Technical Summary

Problems solved by technology

[0002] In the field of drilling technology, there are two solutions for core extraction and wireline coring. Among them, the core extraction solution has a relatively simple structure, good reliability, and is easy to realize automatic control, so it is widely used in subsea drilling rigs ; When the drilling depth is deep, the rope coring scheme can reduce the auxiliary operation time, and the operation efficiency is high. At the same time, the wall protection effect on the hole wall is better, and the core quality is better. Large size and poor reliability, especially for seabed core sampling drilling operations, because it is difficult to realize the automatic operation of switching between the power head and the wireline coring system and the disengagement of the core pipe and the overshot, which restricts the use of wireline coring technology in deep holes on the seabed. Applications on Rigs

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