Schlumberger

Product Sheet: G-Seal

Date: 5/1/2010

Download: G-SEAL (0.23 MB PDF)

G-SEAL graphite is a coarse-sized plugging agent used to bridge and seal permeable formations in water-, oil- or synthetic-base mud systems. When drilling depleted zones where high differential pressures exist, the bridging and plugging capabilities of G-SEAL additive reduce differential-pressure sticking tendencies. It can be used to control seepage in partial-to- severe lost-circulation zones. G-SEAL additive is completely inert and does not affect rheological properties. It reduces torque and drag by increasing the lubricity and lowers the spurt and total filtrate loss values in Permeability Plugging Test (PPT) and sandbed laboratory studies.

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