Subsurface flow control apparatus and method

Details Subsurface flow control apparatus and method Subsurface flow control apparatus and method

1976-07-02

1977-07-19

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166314, 166320, 166321, 166325, E21B 4312, E21B 4706

Patent

active

040362973

ABSTRACT:
A subsurface control which can be installed and retrieved from the interior of a borehole by a wireline. The apparatus is preferably located at the bottom of the borehole and controls the flow of well fluids by a pulse flow-type operation which shuts in the well prior to reaching the critical flow rate, and re-establishes flow after sufficient pressure buildup in the borehole and formation. The apparatus more efficiently utilizes well energy in lifting liquid to the surface of the ground, and includes apparatus which cyclically flows the well in response to flow rate and bottomhole pressure. In one embodiment of the invention, the apparatus is used in combination with a free traveling plunger.

REFERENCES:
patent: 2071639 (1937-02-01), Long
patent: 2251244 (1941-07-01), Stanley
patent: 2351322 (1944-06-01), Crake
patent: 2565742 (1951-08-01), Sailers
patent: 3025798 (1962-03-01), Coberly et al.
patent: 3045759 (1962-07-01), Garrett et al.
patent: 3456728 (1969-07-01), Chenoweth
patent: 3601191 (1971-08-01), McMurry et al.

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