Schlumberger

Product Sheet: SAFE‐VIS LE

Date: 3/1/2004

SAFE-VIS LE liquid viscosifier is a suspension of high-quality hydroxyethylcellulose (HEC) polymer in a highly-purified mineral oil carrier. HEC is a modified high-molecular-weight, non-ionic natural polymer specially suited to increasing the viscosity of brines. This easily breakable, non-fermenting polymer will increase viscosity and carrying capacity of workover and completion fluids and heavy brines. It is not adversely affected by polar compounds or divalent cations, such as calcium and magnesium or cement. The low-toxicity carrier fluid assists in dispersion and helps prevent lumps or "fisheyes," so that the polymer rapidly and smoothly viscosifies without the need for high shear.

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