Patent ID: 11866637
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 5:
6. A method of lubricating a tool surface, the method comprising:
providing an aqueous-based drilling fluid, the aqueous-based drilling fluid having a mono-facial polymer-grafted graphene particle, where a first side of the graphene particle comprises a grafted polymer; and
introducing the aqueous-based drilling fluid into a wellbore such that it contacts a tool surface to form a coated tool;
wherein the grafted polymer comprises an anchor functional group selected from the group consisting of a carboxylic acid group, a silane group, a phosphonate group, and combinations thereof; and
wherein the composition has a coefficient of friction of less than about 0.3.