System for controlling the flow of fluid in an oil well

Details System for controlling the flow of fluid in an oil well System for controlling the flow of fluid in an oil well

1995-04-07

1997-10-07

Dang, Hoang C.

Wells

Pistons, fluid driven into well

With downflow past piston

137599, 138 42, 1662421, 166318, 166320, E21B 1714, E21B 3406

Patent

active

056737513

ABSTRACT:
A device is provided for controlling fluid flow in oil well casings or drill pipes. The device defines a flowpath for fluid through a casing section or drill pipe with the flowpath including a throttling valve which restricts or prevents the flow of fluid therethrough. This can be used to prevent U-tubing in casings or can be used to locate leaks in drill pipes or can be used to monitor the position of successive fluids of differing viscosities in a casing string.

REFERENCES:
patent: Re20529 (1937-10-01), Penick et al.
patent: 1915867 (1933-06-01), Penick
patent: 2350867 (1944-06-01), Bean et al.
patent: 3586104 (1971-06-01), Hyde
patent: 4058163 (1977-11-01), Yandell
patent: 4466462 (1984-08-01), Morris
patent: 5062481 (1991-11-01), Gullett

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