Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1986-04-30
1987-08-04
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Fluid operated
166326, E21B 3400
Patent
active
046839550
ABSTRACT:
An automatic fill-up floating apparatus usable in a float collar or a float shoe in a casing string. The apparatus includes a housing having a back check valve positioned therein. A spring biases the valve toward a closed position. A filling body is disposed across an opening at a lower end of the housing and includes a flow passage therethrough. The filling body is shearably pinned to a valve stem extending from the valve and has a holding position in which the valve is held in an open position. A resilient washer is annularly positioned around the valve stem and above the filling body. The washer is free to move upwardly in response to upward movement of flow through the flow passage in the filling body as the casing string is lowered into a well. The floating apparatus may be tripped by pumping fluid downwardly through the casing strings such that the washer is forced against the filling body, sealingly covering the flow passage therethrough. When there is sufficient differential pressure across the washer and filling body, the shear pin will be sheared such and the body released from the valve stem. Thereafter, the spring will be free to move the valve to a closed position when downward fluid flow drops sufficiently.
REFERENCES:
patent: 2846015 (1958-08-01), Pittman
patent: 3385370 (1968-05-01), Knox et al.
patent: 3385372 (1968-05-01), Knox
patent: 3409078 (1968-11-01), Knox et al.
patent: 3776250 (1973-12-01), Knox
patent: 4067358 (1978-01-01), Streich
patent: 4457377 (1984-07-01), Burris, II
Halliburton Services Sales and Service Catalog No. 43, pp. 2431-2434.
Baldridge Morris G.
Stepp Lee W.
Treece Harold O.
Halliburton Company
Kennedy Neal R.
Novosad Stephen J.
Odar Thomas J.
Walkowski Joseph A.
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