Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1989-02-06
1991-02-12
Neuder, William P.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 74, 175 75, E21B 704
Patent
active
049916688
ABSTRACT:
A system of apparatus for the controlled directional drilling of a deviated well bore into the earth has a fluid operated drilling motor and drill bit secured on the bottom end of a drill string. The drill bit is supported for angular drilling relative to a substantially vertical well bore by either using a bent sub for supporting the drilling motor or by using a drilling motor with a bent housing or a combination of the two. A bypass tool is connected to the bent sub or motor housing, an orienting sub and mule shoe keying sub are connected to the bypass tool, and a surveying tool is connected in the drill string above the orienting sub and mule shoe sub. The bypass tool is in fluid connection with the motor and has a telescopic housing and a valve for circulating fluid into the bore hole to flush cuttings and debris therefrom. The surveying tool determines and controls the direction of drilling. The orienting sub and mule shoe keying sub orients the position of the motor and drill bit in relation to the surveying tool.
REFERENCES:
patent: 3717208 (1973-02-01), Anderson
patent: 4067404 (1978-01-01), Crase
patent: 4667751 (1987-05-01), Geezy et al.
patent: 4817740 (1989-04-01), Beimgraben
Leitko, Jr. Curtis E.
Maurer William C.
McDonald William J.
Rehm William A.
Bechtel Investments, Inc.
Maurer Engineering Inc.
Mosely Neal J.
Neuder William P.
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