Apparatus and method for installing open-ended tubular members a

Details Apparatus and method for installing open-ended tubular members a Apparatus and method for installing open-ended tubular members a

1994-04-18

1995-10-10

Britts, Ramon S.

Boring or penetrating the earth

Processes

175171, 175257, E21B 700, E21B 720

Patent

active

054563267

ABSTRACT:
An apparatus and a method for installing open-ended tubular members axially into the earth by simultaneously or sequentially driving, drilling, and jetting. A drilling string assembly is located inside the tubular member, but is supported independently from the tubular member. The position of the drill bit on the lower end of the drilling string assembly relative to the lower end of the tubular member may be adjusted so as to control the rate of penetration of the tubular member into the earth.

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