Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1980-04-28
1984-02-14
Pate, III, William F.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 94, 175 73, E21B 706
Patent
active
044310684
ABSTRACT:
This specification discloses a rotary drilling technique for drilling a highy deviated wellbore into the earth's crust wherein a drill string comprised of drill collars and drill pipe is used to advance a drill bit attached to the drill pipe at the lower end of the drill string into the earth and form the wellbore. A first portion of the wellbore is formed to extend into the earth's crust and thereafter a highly deviated second portion of the wellbore is formed by drilling with the drill string arranged to have the drill collars located in the first portion of the wellbore and to apply compressive force on the drill pipe that extends therebelow and thus on the drill bit attached to the lower end thereof to apply the desired weight-on-bit for effective drilling of the second portion of the wellbore.
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"Directional Technology will Extend Drilling Reach" Oil and Gas Jouranal pp. 153-169, 9-15-1980.
Dellinger Thomas B.
Gravley Wilton
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Pate III William F.
Powers, Jr. J. F.
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