公开(公告)号：US11795107B2

公开(公告)日：2023-10-24

申请号：US16991845

申请日：2020-08-12

Applicant: Aramco Services Company

Inventor： Sivaprakash Shanmugam ,  Peter Boul ,  Carl Thaemlitz

IPC: E21B33/14 ,  C04B20/10 ,  C04B14/06 ,  C04B28/04 ,  C04B40/00 ,  C01B33/18 ,  B82Y30/00 ,  B82Y40/00 ,  C04B20/00

CPC classification number: C04B20/1037 ,  C01B33/18 ,  C04B14/062 ,  C04B28/04 ,  C04B40/0032 ,  B82Y30/00 ,  B82Y40/00 ,  C04B20/0008 ,  C04B40/0082 ,  E21B33/14

Abstract: A method of producing a nanosilica-containing cement formulation, the method comprising the steps of mixing an amount of a determinant nanosilica particle and a functional coating; applying a dynamic initiator to trigger a reversible reaction of the functional coating to produce a reversible cage, where the reversible cage surrounds the determinant nanosilica particle to produce an encapsulated nanosilica; and mixing the encapsulated nanosilica and a cement formulation to produce the nanosilica-containing cement formulation.

公开(公告)号：US11781057B2

公开(公告)日：2023-10-10

申请号：US17452913

申请日：2021-10-29

Applicant: ARAMCO SERVICES COMPANY

Inventor： Sivaprakash Shanmugam ,  Amy J. Cairns ,  Mohammed Sayed

IPC: C09K8/74 ,  C09K8/54 ,  C08F293/00 ,  E21B43/27 ,  C09K8/60

CPC classification number: C09K8/54 ,  C08F293/005 ,  C09K8/604 ,  C09K8/74 ,  E21B43/27 ,  C08F2438/03 ,  C09K2208/32

Abstract: A composition for treating a formation includes a surfactant including an amphiphilic block copolymer having a first block and a second block and an acid. The amphiphilic block copolymer is a reaction product of a first monomer and a second monomer via a reversible addition-fragmentation chain transfer polymerization (RAFT) in a two-step reaction using a chain transfer agent (CTA) and a radical initiator. The surfactant favors adsorption onto a surface of the formation such that a temporary barrier is formed, thereby attenuating a reaction rate between the acid and the formation.