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CEMENT ADDITIVES » EXTENDERS
GEX 100 Cement grade bentonite; permits high mix water addition to cement without water separation, added from 2% to 16% BWOC.
GEX 200 Gilsonite; extender/lost circulation material; 5 to 50 lb./sk of cement effective to 380°F (193°C).
GEX 210 Ground coal; extender/lost circulation material; 5 to 50 lb./sk of cement effective to + 288°F (550°C).
GEX 300 Artificial pozzolan; utilized to create lead and tail-in cement designs at 25, 33, 50 and 65% concentration with Portland cement; high thermal stability above 110°F (230°C).
GEX 400 Silicate extender/accelerator; can increase the yield of a sack of cement by 200% to 250% without separation; use range is 0.5 to 3.0% BWOC.
GEX 410 Liquid silicate extender/accelerator; sea water or light salt brine mix water; use range is 0.15 to 0.75 gal/sk.
GEX 420 Expansive, volcanic glass extender; creates low permeability cement, expands 4 to 20 times when heated to its softening point, use level is 0.5 to 2 ft2/sk cement.
GEX 430 Diatomaceous earth extender; low compressive strength development; is effective at 10 to 40% BWOC.
GLO-LITE Ultra-lite alumina micro-spheres; effective in wells having up to 6,000 psi overburden pressure, slurry densities from 9.0 to 13.0 lb./gal.
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