| 摘要 |
Disclosed is a hydrocarbon-based concentrate composition for crosslinking polysaccharide polymers in an aqueous-based fluid, such as a fracturing fluid, wherein the hydrocarbon-based composition has no or substantially no detectable levels of benzene, toluene, ethyl- benzene, and/or m-, 0-, or p-xylenes (BTEX). Preferred polysaccharide polymers are galactomannan gums or derivatives thereof. The con¬ centrate comprises an oleaginous solution, such as a hydrocarbon dis¬ tillate, a crosslinking agent for crosslinking the polysaccharide poly¬ mer, preferably a sparingly soluble alkali metal or alkali metal alka¬ line earth metal borate, and a stabilizing/suspension agent, preferably a clay mineral selected from the group consisting of smectite clays. The concentrate may, optionally, contain a deflocculant and/or an an- ti-syneresis additive. |
