Landing nipple

Details Landing nipple Landing nipple

1981-05-11

1983-05-03

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166332, E21B 3414

Patent

active

043818226

ABSTRACT:
A landing nipple having a port through the wall thereof which is controlled by a valve carried by a non-circular ring which ring may be moved toward circular position by introduction of a sleeve-like member into the bore through the ring to unseat the valve.

REFERENCES:
patent: 1639743 (1927-08-01), Marscheider
patent: 1969163 (1934-08-01), Stevenson
patent: 4134452 (1979-01-01), Kingelin
patent: 4201364 (1980-05-01), Taylor
patent: 4244393 (1981-01-01), Lehtinen

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