Stable suspension of hydrocolloids
First Claim
1. An oil well spacer fluid comprising a salt solution, a water soluble polymer, a superplasticizer, and a rheological control agent comprising water insoluble microbially derived cellulose fibers.
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Abstract
The present invention comprises a stable hydrocolloid welan gum in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixtures thereof. This is then dispersed in a rheological control agent which is a microbially-produced cellulose fiber composition. The composition is rapidly hydratable and useful as a stabilizing additive in many cement and drilling fluid applications, insulation fluids and de-icer compositions.
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Citations
18 Claims
- 1. An oil well spacer fluid comprising a salt solution, a water soluble polymer, a superplasticizer, and a rheological control agent comprising water insoluble microbially derived cellulose fibers.
- 11. A cement or injection grout comprising a uniform suspension of a water soluble polymer, a superplasticizer and a rheological control agent comprising water insoluble microbially derived cellulose fibers.
Specification