Well drilling apparatus

Details Well drilling apparatus Well drilling apparatus

1980-12-03

1982-01-12

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Operated by dropped element

137501, 166322, 175 48, 175317, E21B 2110

Patent

active

043100503

ABSTRACT:
A method of and apparatus for removing fluids entering into a well bore from a well formation while the well is being drilled, such as gas, in which the gas bubble is chopped into small bubbles by mixing the gas with drilling mud and pumping the mixed gas and drilling mud upwardly through the drill string-bore hole annulus and removing it from the well.

REFERENCES:
patent: 3005507 (1961-10-01), Clark et al.
patent: 3007523 (1961-11-01), Vincent
patent: 3282323 (1966-11-01), Katz et al.
patent: 3357448 (1967-12-01), Martin
patent: 3482405 (1969-12-01), Sansevero, Jr.
patent: 3542130 (1970-11-01), Stout
patent: 3799278 (1974-03-01), Oliver
patent: 3908769 (1975-09-01), Schuyf et al.

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