Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1977-08-16
1979-10-02
Pate, III, William
Boring or penetrating the earth
Processes
Boring with specific fluid
175267, 175318, 175285, E21B 926
Patent
active
041695100
ABSTRACT:
A combination drilling and belling apparatus includes a frame having at one end a drilling area for drilling a borehole in the earth. A pair of belling arms are pivotally carried by the frame and are selectively movable between a drilling position and a non-drilling position. The belling arms have a drilling surface such that when the belling arms are moved to the drilling position and the apparatus is rotated, the belling arms same form an enlarged bell-shaped cavity. When the belling arms are in a non-drilling position, a valve means is provided for closing an opening through a side wall of a drilling mud flow conduit, thereby preventing flow of drilling mud through the opening. When the belling arms are in the drilling position, the valve means is moved to an open position whereby drilling mud can flow from the cavity through the opening and upwardly through the conduit, carrying the cuttings therewith.
REFERENCES:
patent: 2069482 (1937-02-01), Seay
patent: 2679383 (1954-05-01), Garrison
patent: 2872160 (1959-02-01), Barg
patent: 3196960 (1965-07-01), Kammerer
patent: 3757876 (1973-09-01), Pereau
patent: 3757877 (1973-09-01), Leathers
Pate, III William
Phillips Petroleum Company
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