	US 11,939,518 B2
	Wellbore treatment fluid
Alejandro de la Cruz Sasso, Al-Khobar (SA); Hassan Ali Ghadban, Dhahran (SA); and Paul J. Jones, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Feb. 28, 2022, as Appl. No. 17/682,964.
Prior Publication US 2023/0272260 A1, Aug. 31, 2023
Int. Cl. C09K 8/08 (2006.01); C09K 8/40 (2006.01)

CPC C09K 8/40 (2013.01) [C09K 8/08 (2013.01)]

20 Claims

1. A method for displacing wellbore fluids, comprising:

providing a spacer fluid comprising water and a spacer additive, wherein the spacer fluid has a yield point of about 2 lbf/100 ft²to about 50 lbf/100 ft², wherein the spacer additive comprises a biopolymer polysaccharide gum, a modified cellulose, and a solid scouring material,

wherein the spacer additive is essentially free of crystalline silica;

wherein the spacer additive is essentially free of clay;

wherein the biopolymer polysaccharide gum is present in the spacer additive in an amount of about 2% to about 6% by weight of the spacer additive;

wherein the modified cellulose is present in the spacer additive in an amount of about 0.25% to about 3% by weight of the spacer additive; and

wherein the solid scouring material is present in the spacer additive in an amount of about 91% to about 97.9% by weight of the spacer additive; and

introducing the spacer fluid into a wellbore to displace at least a portion of a first fluid in the wellbore.