Well injection system

Details Well injection system Well injection system

1982-12-06

1985-01-22

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Destructible element

166322, 137 70, E21B 3410

Patent

active

044946082

ABSTRACT:
A well system for injection into a selected formation in each tubing string in a multiple formation dual string well completed for through flow line/pumpdown operation, utilizing a string of tools which may be pumped down tubing to open selected tubing sleeve valves between packers. Each tool string includes a pressure openable injection valve which seals across the open sleeve valve and is opened for formation injection flow at preselected pressures by application of tubing pressure at the surface. One type of injection valve closes to flow through when pressure opened for injection flow. The other injection valve is closed to injection flow on insertion of a closing prong having a through flow passage. Both injection valves and their respective tool strings may be individually retrieved closing sleeve valves in each tubing and the formations to injection.

REFERENCES:
patent: 2251977 (1941-08-01), Burt
patent: 3319717 (1967-05-01), Chenoweth
patent: 3455382 (1969-07-01), Chenoweth
patent: 4270610 (1981-06-01), Barrington
patent: 4324293 (1982-04-01), Hushbeck
patent: 4352366 (1982-10-01), Fisher, Jr.

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