Chemical dispensing system

Details Chemical dispensing system Chemical dispensing system

1997-03-11

1998-09-29

Tsay, Frank

Wells

Above ground apparatus

With means for injecting solid or particulate material into...

166310, E21B 33068, E21B 4300

Patent

active

058134557

ABSTRACT:
An apparatus and method for automatically dispensing chemical sticks into a well bore is provided. In the preferred form, the apparatus is for dispensing soap sticks to unload an oil/gas producing well of fluid, e.g., salt water, built-up therein. The apparatus is a tubular receptacle with an upper storage section and a lower receiving chamber with sticks stacked end-to-end in the storage section and fed, as by gravity feed, to the receiving chamber after a stick is dispensed therefrom. An operating mechanism controls dispensing so that a stick is dispensed based on a predetermined timing sequence or when a predetermined well condition is reached. A preferred soap stick for use in the apparatus includes a water-soluble, flexible, resilient sheath encasing the stick body tightly therein.

REFERENCES:
patent: 2961045 (1960-11-01), Stigman et al.
patent: 3403729 (1968-10-01), Hickey
patent: 4033408 (1977-07-01), Fredd et al.
patent: 4132243 (1979-01-01), Kuus
patent: 4785880 (1988-11-01), Ashton
patent: 4944347 (1990-07-01), Richard et al.

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