	US 11,981,856 B1
	Date palm leaves extract (DPLE) as a shale swelling inhibitor in water-based drilling fluids
Tawfik Abdo Saleh, Dhahran (SA); Azeem Rana, Dhahran (SA); Mobeen Murtaza, Dhahran (SA); Muhammad Shahzad Kamal, Dhahran (SA); and Mohamed Mahmoud, 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 Mar. 10, 2023, as Appl. No. 18/181,711.
Int. Cl. C09K 8/035 (2006.01); C09K 8/20 (2006.01)

CPC C09K 8/206 (2013.01) [C09K 2208/12 (2013.01)]

20 Claims

1. A drilling fluid composition, comprising:

an aqueous base fluid;

0.01 to 10 wt. % of a date palm leaves extract (DPLE);

1 to 10 wt. % of clay particles; and

0.01 to 1 wt. % of a base;

each wt. % based on a total weight of the drilling fluid composition;

wherein the DPLE is homogenously disposed on surfaces of the clay particles;

wherein the clay particles disposed with the DPLE are present in the drilling fluid composition in the form of a composite; and

wherein a pellet made from the clay particles treated with the DPLE has a swelling value at least 75% less than a swelling value of the pellet in an aqueous composition that does not contain the DLPE.