Apparatus and method for driving casing and conductor pipe

Details Apparatus and method for driving casing and conductor pipe Apparatus and method for driving casing and conductor pipe

E - Fixed Constructions

21

B

255/8

E21B 43/10 (2006.01) E21B 6/00 (2006.01) E21B 7/20 (2006.01) E21B 17/10 (2006.01) E21B 21/12 (2006.01)

Patent

CA 1240310

ABSTRACT OF THE DISCLOSURE Apparatus for driving casing or conductor pipe into the ground include a casing or conductor pipe adapted to be driven into the ground and having an internally disposed support shoulder. A reciprocal impact driver is supported atop the casing or conductor pipe for apply- ing percussive force thereto, and a drill string assembly is supported upon the support shoulder within the casing or conductor pipe for drilling a hole at the bottom portion thereof. A drill bit is connected to the drill string assembly, and a fluid driven drill is releasably connected to the drilling string assembly for imparting rotary motion thereto. Means are associated with the drill string assembly for creating a fluid pressure differential between the interior and the exterior of the drill string to evacuate drilling debris and cuttings from the drilled hole. The driver and drill are opera- tive simultaneously or sequentially.

479971

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