Mineral oil–based drilling fluid system
Cut costs and bolster environmental compliance.
It increases low-shear-rate viscosities [LSRV] and gel strengths for improved hole cleaning. The primary application for VERSAMOD viscosifier is in large-diameter, high-angle, horizontal, and extended-reach wells to increase cuttings-carrying capacity. This permits higher rates of penetration while maintaining wellbore stability. VERSAMOD viscosifier, when used at proper concentrations, produces the highly shear-thinning rheological profile found in VERSAPORT oil mud systems.
|Typical Physical Properties|
|Physical appearance||Amber viscous liquid|
|Flash point||175 degF [79.4 degC] [PMCC]|
|Pour point||35 degF [1.7 degC]|
VERSAMOD viscosifier is used to improve cuttings transport in large-diameter or directional wells, especially wells with diameters greater than 8 1⁄2 in. or deviations greater than 25 deg. It modifies the rheological profile of oil-base muds, increasing their shear-thinning and thixotropic characteristics without using additional clay-base additives.
VERSAMOD agent can be used in the existing Versadril and Versaclean systems, as well as in freshly prepared mud, to prepare a Versaport system with increased LSRV and gel strengths. Sufficient shear is required to develop this increase in rheology, especially in freshly prepared muds.
Normal concentrations range from 1 to 4 lb/bbl [2.85 to 11.4 kg/m3], depending on the brine content. Less VERSAMOD viscosifier is needed in muds with higher brine contents. Typical initial treatments are 1 to 2 lb/bbl [2.85 to 5.7 kg/m3] for muds with oil:water ratios in the 75:25 to 85:15 range; above 85:15 the effectiveness is diminished. Pilot testing is recommended to determine the actual treatment required to obtain the desired result.
VERSAMOD viscosifier is activated by calcium, shear and temperature. Generally, 1 lb/bbl [2.85 kg/m3] lime should be added and maintained for every 1 lb/bbl [2.85 kg/m3] VERSAMOD viscosifier used in a system. VERSAMOD material will not be fully activated by the shear and temperature exposure in a mixing plant or mud pit, care should be taken not to overtreat with VERSAMOD viscosifier until the fluid is actually circulated through the well.
Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the safety data sheet. Avoid exposure. VERSAMOD viscosifier contains mineral oil, which is an irritant to eyes, skin, and respiratory system.
VERSAMOD viscosifier is packaged in 55-galUS [208-L] drums and 5-galUS [18.9-L] cans. Store in a dry, well-ventilated area. Keep container closed. Keep away from heat, sparks, and flames. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping, and stacking.