Apparatus for drilling straight portion of a deviated hole

Details Apparatus for drilling straight portion of a deviated hole Apparatus for drilling straight portion of a deviated hole

1980-09-19

1982-08-10

Purser, Ernest R.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Normally curved guide or shaft

175 61, 175325, 464 19, 464 21, E21B 708

Patent

active

043433693

ABSTRACT:
A guide for drilling a straight section of a bore hole deflected from the vertical. The apparatus comprises either a normally straight or a curved-straight tubular member which has a plurality of generally circumferential cuts disposed along the length of the guide. The cuts allow the guide to be bent sufficiently to enter and traverse a short radius curve and then return to its normal configuration for guiding the drilling of the straight portion of the deflected bore hole. A clutch mechanism disposed in the drill guide permits engagement of the guide by the drill string for orientation of the guide.

REFERENCES:
patent: 2382933 (1945-08-01), Zublin
patent: 2585207 (1952-02-01), Zublin
patent: 2694549 (1954-11-01), James
patent: 3160218 (1964-12-01), Crake
patent: 3903974 (1975-09-01), Cullen
patent: 4067404 (1978-01-01), Crase

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