Surface layer guide pipe tripping-in device and method suitable for seabed drilling machine

Abstract

The invention relates to a surface layer guide pipe tripping-in device and method suitable for a seabed drilling machine. The surface layer guide pipe tripping-in device comprises at least two sections of surface layer guide pipe assemblies and a drill column assembly; each surface layer guide pipe assembly comprises a surface layer guide pipe top plate, a first surface layer guide pipe, a second surface layer guide pipe and a surface layer guide pipe bottom plate, wherein the first surface layer guide pipe is fixed to the lower end face of the surface layer guide pipe top plate, the second surface layer guide pipe is fixed to the upper end face of the surface layer guide pipe bottom plate, a clamping component is arranged at the upper end of the second surface layer guide pipe, a locking component matched with the clamping component is arranged at the lower end of the first surface layer guide pipe, the second surface layer guide pipe is annularly sleeved with the first surface layer guide pipe, and the second surface layer guide pipe can slide along the inner wall of the first surface layer guide pipe; and the drill column assembly is arranged in the second surface layer guide pipes and comprises an underground power drilling tool, a drill rod and a drill bit which are sequentially connected in series, and drill rod holes for the drill rod to penetrate through are formed in the surface layer guide pipe bottom plates. According to the device, guide pipe tripping-in and subsequent drilling are completed through one-time drilling, the surface layer guide pipe tripping-in depth is effectively increased, and the application range is widened.

Description

technical field [0001] The invention relates to a surface conduit running device and method suitable for a seabed drilling rig, and belongs to the technical field of offshore drilling. Background technique [0002] With the increasing water depth of deepwater oil and gas drilling and development, the current method of ordinary deepwater ocean drilling has caused some problems in terms of drilling cost, drilling efficiency, technical difficulty and safety. To this end, scholars have proposed a concept of placing a highly automated and modular deepwater drilling system at the seabed mud line, that is, a subsea drilling rig. This kind of drilling system does not require a surface drilling platform, does not require a rigid riser system, and only has control umbilicals, which has higher adaptability to water depth and reduces drilling costs. At present, the system mostly adopts the method of open-hole drilling, and the soft surface layer lacks effective sealing means, which may...

AI Technical Summary

Problems solved by technology

At present, the system mostly adopts the method of open-hole drilling, and the soft surface layer lacks effective sealing means, which may easily cause the wellbore to collapse, thereby limiting its drilling depth and affecting its application range

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