Well tree saver

Details Well tree saver Well tree saver

1979-05-02

1980-12-30

Novosad, Stephen J.

Wells

Above ground apparatus

Moving tubing or cable into an existing well

E21B 1900, E21B 3303, E21B 4326

Patent

active

042417864

ABSTRACT:
A bypass attachment is provided to prevent damage to the valves of a well tree when fluid at high pressure is passed into a well, such as during a fracturing process. The bypass attachment is formed of a piston rod removably mounted to the well tree and offset from it, a piston mounted on the piston rod, a cylinder movable on the piston, the cylinder bearing a piece of high-pressure tubing aligned with the passage through the well-head tree, a high-pressure valve to close off the high-pressure tubing and sealing means to seal the space between the exterior of the high-pressure tubing and the interior of the vertical passage through the well-head tree.

REFERENCES:
patent: 1586923 (1926-06-01), Townsend
patent: 1895132 (1933-01-01), Minor
patent: 2126933 (1938-08-01), Stone et al.
patent: 2555145 (1951-05-01), McKinney
patent: 3096075 (1963-07-01), Brown
patent: 4076079 (1978-02-01), Herricks et al.
patent: 4162704 (1979-07-01), Gunther

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