公开(公告)号：US10113099B2

公开(公告)日：2018-10-30

申请号：US14766507

申请日：2014-02-18

Applicant: ISP INVESTMENTS INC.

Inventor： Janice Jianzhao Wang ,  Jun Zheng ,  Mohand Melbouci

IPC: C09K8/68 ,  C09K8/24 ,  C09K8/18 ,  E21B7/00 ,  E21B43/16

Abstract: What is described herein is an aqueous high-temperature high-pressure (HTHP) stable drilling mud composition comprising (i) about 20 wt. % to about 80 wt. % of 0-60% w/w brine solution; (ii) about 0.1 wt. % to about 3 wt. % of butylated reaction product of p-cresol and dicyclopentadiene, a polymeric hindered phenol based antioxidant; (iii) about 0.1 wt. % to about 10.0 wt. % of triethanol amine, a chelating agent; (iv) (a) about 0.1 wt. % to about 10 wt. % of rheology modifier (RM); and/or (b) about 0.5 wt. % to about 30 wt. % of fluid loss additive (FLA); (v) about 20 wt. % to about 80 wt. % of weighting agent; (vi) about 0 wt. % to about 20 wt. % of drilling solid; and (vii) about 0 wt. % to about 50 wt % of water.