SPOTFREE W is a unique blend of an emulsifier, a surfactant and an organophilic clay which is designed for preparing oil-base spotting fluids to free differentially stuck pipe.
SPOTFREE W is mixed with oil, water and weight material to prepare a weighted oil-base spotting fluid to free differentially stuck pipe. Oil phase of spotting fluid is made up of crude oil, diesel oil, mineral oil or SLIDE L. Freshwater, seawater or brine constitute water portion. Once formulated the fluid is placed in stuck zone. SPOTFREE W breaks down filter cake and allows the spotting fluid to penetrate between the drill string and formation while wetting and lubricating the drill string. This dual effect of spotting fluid reduces the force necessary to free stuck pipe.