Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent
1976-11-12
1978-04-11
Leppink, James A.
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
175339, E21C 1500
Patent
active
040834174
ABSTRACT:
A jetting apparatus is provided to be a part of a drill string used in drilling a well. The apparatus functions to reduce the hydrostatic pressure of the drilling mud on the bottom of the hole to approach or attain optimal drilling conditions. The apparatus has a body with a plurality of upwardly facing shoulders. A jet nozzle is placed in each of the shoulders to direct or discharge mud vertically upwardly along and parallel to the lower part of the drill string to provide a jet lifting action which reduces the hydrostatic mud pressure on the bottom of the bore hole.
REFERENCES:
patent: 2324956 (1943-07-01), Sewell
patent: 2485098 (1949-10-01), Johnson
patent: 2643094 (1953-06-01), Peter
patent: 2765146 (1956-10-01), Williams, Jr.
patent: 2776115 (1957-01-01), Williams, Jr.
patent: 3111179 (1963-11-01), Albers et al.
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