M‐I PAC SR

Polyanionic cellulose fluid‐loss, viscosifying additive

M‐I PAC SR polyanionic cellulose is a fluid‐loss and viscosity‐control additive. M‐I PAC SR agent is a regular semi‐pure grade quality PAC, useful in controlling filtration and increasing rheology in all types of water, but has greater effectiveness in saltwater‐base brines. M‐I PAC SR additive will aid in dispersion control by attaching and encapsulating the drill solids. It may be used at all density ranges, and functions effectively in dispersed and non‐dispersed systems.

M‐I PAC SR additive controls fluid loss in freshwater, seawater, KCl, and saltwater drilling fluid systems. M‐I PAC SR agent aids in the formation of a tough, thin filtercake to minimize the potential for differential sticking. It is useful in viscosifying all types of water to create sufficient yield point to assist in the carrying capacity of solids for improved hole cleaning.

M-I PAC SR creates an envelope around and escapsulates exposed shales and cuttings, reducing dispersion and permitting improvement of wellbore integrity. The encapsulation protects the shale from exposure to water.

Advantages

• Effective in controlling fluid loss
• Resists attack from bacteria, requiring no preservatives or bactericide
• Environmentally acceptable
• Depending on water quality, provides viscosity
• Functions at all ranges of pH levels in both dispersed and non‐dispersed fluids