Wells – Automatic
Patent
1980-06-20
1981-11-10
Novosad, Stephen J.
Wells
Automatic
166 57, 166 64, 166 65R, 166303, E21B 3416, E21B 3600, E21B 4324
Patent
active
042992788
ABSTRACT:
In a control system for delivery of steam at a predetermined pressure to the head of an oil well for use in an open orifice bottom hole heater, a boiler, remote from the well head, is connected by a steam delivery line through a series of valves with a steam pipe extending downwardly into the well to the orifice location near the bottom. In the steam delivery line is a main valve, downstream of which is a pressure regulator and upstream of which is a back pressure regulator. A sensing pressure line from the pressure regulator taps into the delivery line near the well head and a control line from the pressure regulator connected with the main valve control. A back pressure line from the back pressure regulator connects with the delivery line near the boiler and a control line from the back pressure regulator connects with the main valve control. Simultaneous control by the two regulators maintains a constant preset pressure at the well head thereby to maintain a fixed constant temperature for the crude oil at the bottom of the well.
REFERENCES:
patent: 1439560 (1922-12-01), Lee
patent: 2347769 (1944-05-01), Crites
patent: 2643208 (1953-06-01), Ogden et al.
patent: 2828821 (1958-04-01), Waterman
patent: 2871948 (1959-02-01), Normand
patent: 3066737 (1962-12-01), Baldwin
Beehler Vernon D.
Novosad Stephen J.
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