US 12,441,930 B1
Wellbore and geologic formation desulfurization process
Sagheer A. Onaizi, Dhahran (SA); and Mustapha Iddrisu, 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. 7, 2025, as Appl. No. 19/073,674.
Application 19/073,674 is a continuation of application No. 18/809,440, filed on Aug. 20, 2024, granted, now 12,275,892.
Int. Cl. C09K 8/54 (2006.01); B01D 53/52 (2006.01); B01D 53/80 (2006.01); B01J 20/06 (2006.01); B01J 20/30 (2006.01); C01G 51/40 (2025.01); C09K 8/16 (2006.01); E21B 21/00 (2006.01); E21B 41/02 (2006.01)
CPC C09K 8/54 (2013.01) [B01D 53/52 (2013.01); B01D 53/80 (2013.01); B01J 20/06 (2013.01); B01J 20/3085 (2013.01); C01G 51/40 (2013.01); C09K 8/16 (2013.01); E21B 21/00 (2013.01); E21B 41/02 (2013.01); B01D 2251/604 (2013.01); B01D 2257/304 (2013.01); C01P 2002/22 (2013.01); C01P 2002/30 (2013.01); C01P 2002/72 (2013.01); C01P 2002/82 (2013.01); C01P 2002/88 (2013.01); C09K 2208/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of removing hydrogen sulfide from a wellbore in a subterranean geological formation, comprising:
injecting a drilling fluid suspension into the wellbore in the subterranean geological formation,
wherein the drilling fluid suspension comprises bentonite, xanthan gum, starch, potassium hydroxide, and a layered triple hydroxide material comprising manganese, cobalt, and iron,
wherein the drilling fluid suspension has a pH of 10 or more,
wherein the layered triple hydroxide material is present in an amount of 0.01 to 0.5 percent by weight of the drilling fluid suspension,
circulating the drilling fluid suspension in the subterranean geological formation and forming a water-based mud; and
scavenging the hydrogen sulfide from the subterranean geological formation by reacting the hydrogen sulfide with the layered triple hydroxide material in the water-based mud.