Method and apparatus for directional drilling

Details Method and apparatus for directional drilling Method and apparatus for directional drilling

1987-05-15

1989-06-06

Neuder, William P.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 73, 175 74, 175256, E21B 708

Patent

active

048363014

ABSTRACT:
A method of directionally drilling a borehole makes use of a drilling assembly including an apparatus having an upper section with a longitudinal axis I, and a lower section having a central axis II and including at least part of a rotary drill bit, said sections being interconnected by a universal pivot mechanism. The method comprises rotating the assembly in such a manner that the upper section rotates about said longitudinal axis I and the lower section rotates about said central axis II. During at least part of the drilling operations said central axis II is tilted and rotated in an orbital mode relative to said longitudinal axis I such that a plane containing said two axes is maintained in a predetermined orientation relative to a reference direction.

REFERENCES:
patent: 2919897 (1960-01-01), Sims
patent: 3586116 (1971-06-01), Tiraspolsky et al.
patent: 3667556 (1972-06-01), Henderson
patent: 4465147 (1984-08-01), Feenstra et al.
patent: 4485879 (1984-12-01), Kamp et al.
patent: 4492276 (1985-01-01), Kamp
patent: 4522272 (1985-06-01), Beimgraben
patent: 4637479 (1987-01-01), Leising
patent: 4655299 (1987-04-01), Schoeffler

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