ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,269, issued on Feb. 3, was assigned to William Marsh Rice University (Houston) and Saudi Arabian Oil Co. (Dhahran, Saudi Arabia).
"Cementing a wellbore using a direct ink printing" was invented by Hasmukh A. Patel (Katy, Texas), Ali Zein Khater (Houston), Peter Boul (Houston), Pulickel M. Ajayan (Houston) and Muhammad M. Rahman (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and systems for cementing a wellbore are described. The methods include forming a slurry including a cement-based matrix, water, a polymer-based additive, and a rheology modifying agent; mixing the slurry to form a printing ink; introducing the slurry and a printe...