UT‑HRP is a rheology modifier designed to rapidly build gel strength and viscosity of organic clay in oil‑based mud (OBM). It is highly effective when organic clay fails to develop adequate rheological properties (e.g., yield point and gel strength) immediately after mud preparation due to one or more of the following:
l Insufficient high‑shear agitation of organic clay in the mud during mixing, limited by mixing equipment capacity.
l Inadequate mixing time for organic clay in the mud during preparation; the organic clay fails to fully develop its gel‑strengthening and viscosity‑building effects, resulting in low initial mud rheology.
l Low aromatic content in the base oil used for mud preparation. Base oils with high aromatic content (e.g., certain diesel oils) enable organic clay to build gel strength and viscosity much faster than low‑aromatic mineral oils.
l Low base oil temperature at the time of organic clay addition.
l Very low base oil viscosity and a high oil‑to‑water ratio in the OBM (e.g., 95:5, or even 100:0 for all‑oil mud). Such muds exhibit poor rheology and insufficient suspension capacity.
Under the above conditions, UT‑HRP is an excellent choice. By optimizing the mud formulation, UT‑HRP works synergistically with organic clay to achieve the desired mud properties.
Physical and Chemical Properties of UT-HRP
Appearance: Orange, transparent liquid
Density (20°C): 0.95 – 1.0 g/cm³
Flash Point (open cup): ≥110°C
Solubility: Soluble in organic solvents
