Drilling technique

Details Drilling technique Drilling technique

1978-04-03

1980-03-25

Leppink, James A.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

166 50, E21B 704

Patent

active

041945808

ABSTRACT:
This specification discloses a technique of providing a wellbore that extends from a surface location to a subsurface location in a mineral bearing formation which subsurface location is spaced a great lateral distance from the surface location. The wellbore is provided to have a first portion that extends essentially vertically from the surface location into the earth's crust and into a formation having good drilling characteristics, a second portion that extends for a great distance within and essentially parallel to the bedding plane of the formation having good drilling characteristics, and a third portion that extends essentially vertically from the farthest extension of the second portion to the subsurface location in the mineral bearing formation.

REFERENCES:
patent: 2271005 (1942-01-01), Grebe
patent: 2280851 (1942-04-01), Ranney
patent: 2404341 (1946-07-01), Zublin
patent: 2565794 (1951-08-01), Young
patent: 2646254 (1953-07-01), Johnston
patent: 3401749 (1968-09-01), Daniel
patent: 3406766 (1968-10-01), Henderson
patent: 3598190 (1971-08-01), Pfau
Gatlin Petroleum Engineering, Drilling and Well Completions (1960), Prentice Hall Inc., Englewood Cliffs, N.J., pp. 160, 161.

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