US 12,269,987 B2
Low density oil-based wellbore fluids and methods thereof
Roger Daniloff, Sandnes (NO); Arne Asko, Sandnes (NO); Nicholas Hilbig, Sandnes (NO); and Jerome Pic, Tananger (NO)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Aug. 8, 2023, as Appl. No. 18/446,121.
Application 18/446,121 is a division of application No. 17/287,378, granted, now 11,767,459, previously published as PCT/US2019/057329, filed on Oct. 22, 2019.
Claims priority of provisional application 62/749,634, filed on Oct. 23, 2018.
Prior Publication US 2023/0383169 A1, Nov. 30, 2023
Int. Cl. C09K 8/36 (2006.01); E21B 21/00 (2006.01); E21B 43/16 (2006.01)
CPC C09K 8/36 (2013.01) [E21B 21/003 (2013.01); C09K 2208/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wellbore fluid, comprising:
an oleaginous continuous phase;
a non-oleaginous discontinuous phase;
an emulsifier stabilizing the non-oleaginous phase within the oleaginous phase;
a low density material selected and in an amount to result in a specific gravity of the wellbore fluid that is less than 0.83; wherein the low density material is glass microspheres; and
at least one rheology modifier selected to suspend the low density material within the wellbore fluid; wherein the emulsifier comprises a alkoxylated ether acid.