US 11,981,857 B1
Drilling fluid composition and method of making the composition
Tawfik Abdo Saleh, Dhahran (SA); and Azeem Rana, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on May 11, 2023, as Appl. No. 18/315,542.
Int. Cl. C09K 8/20 (2006.01)
CPC C09K 8/206 (2013.01) [C09K 2208/08 (2013.01); C09K 2208/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A drilling fluid composition, comprising:
an aqueous base fluid;
0.01 to 5 wt. % of polyamine-functionalized activated carbon (AC-PAD);
0.1 to 10 wt. % of a shale material;
0.01 to 2 wt. % of a thickener;
0.1 to 10 wt. % of a fluid loss control additive;
0.01 to 5 wt. % of an adsorbent; and
1 to 20 wt. % of a borehole stabilizer;
wherein each wt. % based on a total weight of the drilling fluid composition;
wherein the AC-PAD is uniformly disposed on surfaces of the shale material; and
wherein the shale material has an average pore size of 5 to 400 nanometers (nm).