Method of and apparatus for drilling a horizontal controlled bor

Boring or penetrating the earth – Processes – Boring curved or redirected bores

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Details

33304, 175 45, 175 62, 175 73, 175162, 175220, 175400, E21B 706, E21B 1000

Patent

active

049536389

ABSTRACT:
A method of boring a hole in the earth such as for passing under obstacles, not limited, but including roadways, rivers, dikes, canals or other inexcessible areas where it is impossible to trench a ditch including the steps of advancing a rotating drill string in a direction inclined to the earth's surface to establish a borehole, stopping the rotation and advancement of the drill string, aligning the drill pipe so that the drill bit is inclined at an angle relative to the axis of the drill string towards a new direction desired for the borehole, advancing the drill string and drill bit a short distance without rotation, resuming rotation advancement of the drill string for a short distance, sequentially repeating the steps of advancing the rotationally aligned drill string without rotation to move the drill bit in the newly desired direction, followed by rotation with simultaneous advancement until the new direction of drilling is achieved, after which, until a still different direction is desired, drilling is continued by simultaneously rotating and advancing the drill string.

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Texas Mill Supply, Inc. advertisement for Curv-O-Mark (undated).

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