MMH-bentonite fluids provide outstanding performance in oil field drilling

03/13/2000
Mixed metal hydroxides (MMH) with suspended bentonite particles give industry a cost-effective fluid system with excellent shear-thinning rheological properties.This happens through a cross linking of bentonite particles with bridging MMH particles.The oppositely charged bentonite and MMH particles create a viscous fluid through attraction within a three dimensional (3D) network. The attachment of MMH particles on bentonite platelets, and also their common network, can be observed with a transmission electron microscopy (TEM).As the MMH-bentonite interaction is weak, viscosity breaks down readily with application of small shear forces. Field results of oil field and construction drilling ...
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