公开(公告)号：US20180187065A1

公开(公告)日：2018-07-05

申请号：US15741055

申请日：2015-07-23

Applicant: UNIQUEM INC.

Inventor： Amir MIRZAEI ,  Hirbod RAD

IPC: C09K8/524 ,  C08B37/00 ,  C08B11/02 ,  C09K8/08 ,  E21B21/00

CPC classification number: C09K8/524 ,  C08B11/02 ,  C08B37/0087 ,  C08B37/0096 ,  C09K8/035 ,  C09K8/08 ,  C09K8/592 ,  E21B21/00 ,  E21B43/24

Abstract: An anti-accretion drilling fluid additive comprising at least one of a hydrophobically modified natural polysaccharide and hydrophobically modified and chemically derivatized polysaccharide; and whereby said additive acts as a bitumen encapsulant to provide a barrier against bitumen accretion during drilling in steam assisted gravity drainage (SAG) operations.