The injection of suitable chemicals into gas-condensate wells has become a widely used method of corrosion control in such systems. Because many gas-condensate wells produce water which is relatively low in total solids, a water solution of a neutralizing agent such as soda ash or an inorganic inhibitor such as sodium dichromate can often be used without causing the formation of troublesome precipitates in the tubing. If the tubing in the well is hanging free or if it is perforated above a packer, such a water solution can be injected through the casing wing valve so that it goes to the bottom of the well and returns up the tubing to the surface mixed with the well fluids. Injection of the solution can be accomplished by the use of a power-driven pump or a gravity-feed lubricator.
The gravity-feed lubricator is notable for its simplicity and lack of service problems. One...
