US 11,891,564 B2
Systems and methods in which colloidal silica gel is used to resist corrosion of a wellhead component in a well cellar
Faisal Alissa, Dammam (SA); Bader Aljuaid, Riyadh (SA); Omar Ashi, Jeddah (SA); and Rashed Altowairqi, Taif (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Mar. 31, 2022, as Appl. No. 17/709,819.
Prior Publication US 2023/0313020 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/42 (2006.01); C09K 8/86 (2006.01); C09K 8/84 (2006.01)
CPC C09K 8/426 (2013.01) [C09K 8/845 (2013.01); C09K 8/86 (2013.01); C09K 2208/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a well cellar comprising a base and sidewalls extending from the base;
a wellhead comprising an aboveground region extending above the well cellar and a belowground region in the well cellar, the belowground region of the wellhead comprising a wellhead component having an exterior surface;
a colloidal silica gel occupying a volume extending from the base and sidewalls of the well cellar to the exterior surface of the wellhead component, wherein the colloidal silica gel covers the exterior surface of the wellhead component; and
sand completely covering an upper surface of the colloidal silica gel.