Sealing valve for sludge scavenging system

Details Sealing valve for sludge scavenging system Sealing valve for sludge scavenging system

1978-03-24

1981-01-20

Schwadron, Martin P.

Fluid handling

Systems

With flow control means for branched passages

137881, 175 69, 175218, 251 5, F16K 707

Patent

active

042456720

ABSTRACT:
A drilling rig comprising a plurality of pipes connected in a row, with a drill at the lower end; the rotation transmitting bar or Kelly bar at the top end of the drilling rig must be periodically disconnected so as to install a new pipe section; the invention comprises a valve to seal the upper rotating or Kelly bar when it is disconnected so as to keep the sludge pump primed; the valve comprising a collapsible diaphragm which is forced shut by pressurized fluid to seal the rotating or Kelly bar; and an air escape valve communicating into the row of pipes beneath the sealing valve for effecting removal of air trapped beneath the rotating or Kelly bar valve.

REFERENCES:
patent: 1517504 (1924-12-01), Hansen
patent: 2828101 (1958-03-01), Antram
patent: 2898078 (1959-08-01), Stephenson et al.
patent: 3709248 (1973-01-01), Aurich et al.
patent: 3877529 (1975-04-01), Litchfield

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