Foam Wiper Balls / Darts

The foam wiper ball and dart are designed to wipe drillpipe or tubing string clean of cement, fluids or debris and can be used to separate fluids. 

The foam wiper ball are made of natural rubber of open cell design.  The ball has a parting stretchof 380% to 440%, which means it can pass through small restrictions without being damanged.  IT easily passes through internal upset restrictions, such as mechanical setting tools, diverters, and liner running tools, and multiple balls can be pumped, if necessary. 

The foam dart has a high parting stretch ratio compared to conventional molded rubber wiper plugs and darts, which means it can pass through small restrictions without being damaged.  It easily passes through internal upset restrictions, such as mechanical setting tools, diverters and liner running tools, and through tapered strings.  Foam wiper darts have been used with most types of drilling and displacement fluids.  The foam wiper section of the dart is made from a frothy matrix that can effectively wipe drillpipe sizes ranging from 4½-in. through 6⅝-in.

The foam wiper balls and the foam wiper darts are not recommended to use on cementing work where the ball must continuously pass through extremely tight restrictions repeatedly.

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