Method and apparatus of injecting fluid into a well conduit by c

Details Method and apparatus of injecting fluid into a well conduit by c Method and apparatus of injecting fluid into a well conduit by c

1986-10-27

1987-09-22

Novosad, Stephen J.

Wells

Processes

Entraining or incorporating treating material in flowing...

166902, E21B 4300

Patent

active

046949089

ABSTRACT:
Injecting fluid by inserting a coil tubing having a fluid outlet and a valve above the outlet into a well conduit, biasing the valve to a closed position with a sufficient force to at least balance the hydrostatic force of injection fluid in the tubing, inserting a fluid to be injected in the conduit, and pressurizing the fluid in the coil tubing for opening the valve and injecting the fluid through the fluid outlet. The fluid is ejected in a circumferential direction from the tubing and the tubing may be moved relative to the well conduit while injecting. The upward flow of well fluids in the well conduit may be used to disperse the injected fluid around the interior of the well conduit. The interior of the well conduit may be wiped after injecting the fluid for more evenly spreading the injected fluid. An ejector is connected to the bottom of the coil tubing which initially overbalances the hydrostatic force of the fluid in the coil tubing and opens by injection pressure.

REFERENCES:
patent: 2654436 (1953-10-01), Carlisle et al.
patent: 3566970 (1971-03-01), Crow et al.
patent: 3901313 (1975-08-01), Doniguian et al.
patent: 4031955 (1977-06-01), Ledet
patent: 4216249 (1980-08-01), Clayton
patent: 4256282 (1981-03-01), Goldschild et al.
patent: 4326585 (1982-04-01), McStravick
patent: 4347899 (1982-09-01), Weefer
patent: 4421166 (1983-12-01), Cain

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