Surface flow valve and method

Details Surface flow valve and method Surface flow valve and method

2007-01-16

2007-01-16

Bagnell, David (Department: 3672)

Wells

Processes

Assembling well part

C166S070000, C166S090100, C166S095100, C166S386000

Reexamination Certificate

active

10945310

ABSTRACT:
A surface flow control system for a well. The system comprises a main housing having a main bore there through, and a first port communicating with the main bore. The system further comprises a first valve positioned within the main bore, and wherein the first valve is placed at a position above said first port; and, a second valve positioned within the main bore of the main housing, and wherein the second valve is placed at a position below the first port. The system may further include a swivel connected to the main housing. A second port communicating with the main bore may also be included. In one embodiment, the first port is connected to a tank for collecting fluids discharged from the well, and the second port is connected to a pump for pumping into the well. A method of controlling well pressure is also disclosed.

REFERENCES:
patent: 3690381 (1972-09-01), Slator et al.
patent: 3830304 (1974-08-01), Cummins
patent: 4111261 (1978-09-01), Oliver
patent: 4169504 (1979-10-01), Scott
patent: 5052657 (1991-10-01), Winship
patent: 5246203 (1993-09-01), McKnight et al.
patent: 5857523 (1999-01-01), Edwards

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