Directional drilling pipelay

Details Directional drilling pipelay Directional drilling pipelay

1985-05-06

1987-10-20

Leppink, James A.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 62, 405270, E21B 704

Patent

active

047007885

ABSTRACT:
A method and apparatus are provided for constructing a deep essentially horizontal borehole in the earth, as for the installation of a pipeline in Arctic offshore waters. This directional drilling technique eliminates exposure of an Arctic offshore pipeline to ice gouging and minimizes the hazards associated with unstable permafrost. Means are provided for gripping inside a borehole in order to apply thrust to a drill bit utilized to drill the borehole which is to contain the pipeline.

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