Polymeric rheology modifiers
AssigneeSchlumberger Technology Corporation
InventorsDimitri M. Khramov, Yiyan Chen, Stephen Cliffe, Reda Karoum
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Abstract
Wellbore fluid compositions may include an oleaginous base fluid; and a polymeric rheology modifier incorporating a polar comonomer at a percent by weight (wt %) in the range of 1 wt % to 20 wt %; wherein the low shear rate viscosity (LSRV) of the wellbore fluid measured by FANN 35 rheometer at 3 rpm and 150° F. is in the range of 8 to 12. Methods may include emplacing a wellbore fluid in a wellbore, wherein the wellbore fluid comprises an oleaginous base fluid and a polymeric rheology modifier incorporating a polar comonomer at a percent by weight (wt %) in the range of 1 wt % to 50 wt %; wherein the low shear rate viscosity (LSRV) of the wellbore fluid is in the range of 8 to 12.
Claims6
A wellbore fluid composition, comprising:
- an oleaginous base fluid;
- and
- a polymeric rheology modifier incorporating a polar comonomer at a percent by weight (wt %) in the range of 1 wt % to 50 wt %;
- wherein the polymeric rheology modifier is present in the wellbore fluid composition at a concentration of 0.5 ppb to 3 ppb;
- wherein the polymeric rheology modifier is poly(ethylene-co-acrylic acid) represented by the structure:
- wherein X ranges from 30 to 60 and y ranges from 1.5 to 2;
- wherein M+ represents a calcium salt.
Dependencies are inferred from the claim text.