Drilling fluids and methods of making and using thereof

US11807801B2 · kind B2 · utility

Assignees

• SAUDI ARABIAN OIL COMPANY · SA
• KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS · SA

Inventors

• Mohammed Khalid Al-Arfaj · Dhahran, SA
• Tawfik Abdo Saleh · Dhahran, SA

Key dates

• Filing date: Mar 11, 2021
• Grant date: Nov 7, 2023
• Expiry date: Aug 8, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure relates drilling fluids and methods of producing and using drilling fluids. The drilling fluid includes an aqueous base fluid; a clay-based component; and a shale inhibitor comprising silica grafted with glutamate-glycol. The method of producing the drilling fluid includes reacting silica with glutamate and glycol thereby forming a shale inhibitor comprising silica grafted with glutamate-glycol; and mixing an aqueous base fluid, a clay-based component, and the shale inhibitor to produce a drilling fluid. The method of using the drilling fluid in drilling operations includes mixing an aqueous base fluid, a clay-based component, and a shale inhibitor comprising silica grafted with glutamate-glycol to produce a drilling fluid; and introducing the drilling fluid to a subsurface formation.