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1. (WO2017188946) ADDITIVE TO ENHANCE SAG STABILITY OF DRILLING FLUID

Pub. No.:    WO/2017/188946    International Application No.:    PCT/US2016/029601
Publication Date: Fri Nov 03 00:59:59 CET 2017 International Filing Date: Thu Apr 28 01:59:59 CEST 2016
IPC: C09K 8/32
C09K 8/502
C09K 8/565
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: DAVIS, Chesnee, Lae
LIVANEC, Philip, Wayne
SHUMWAY, William, Walter
Title: ADDITIVE TO ENHANCE SAG STABILITY OF DRILLING FLUID
Abstract:
A method including providing a drilling fluid that comprises a base fluid, a weighting agent, and a sag stability enhancer, wherein the sag stability enhancer comprises polyethylene glycol (PEG) having a molecular weight of greater than or equal to about 200 g/mol; and placing the drilling fluid in a subterranean formation via a wellbore penetrating the subterranean formation. A method including forming a fluid comprising a base fluid, a weighting agent, and from about 0.5 ppb (1.4 kg/m3) to about 30 ppb (85.5 kg/m3) of a sag stability enhancer, wherein the sag stability enhancer comprises a glycol; and introducing the fluid into at least a portion of a well. A drilling fluid containing a base fluid, a weighting agent, and a sag stability enhancer comprising polyethylene glycol (PEG) having a molecular weight of greater than or equal to about 200 g/mol.