公开(公告)号：US20240294820A1

公开(公告)日：2024-09-05

申请号：US18114759

申请日：2023-02-27

Applicant: Saudi Arabian Oil Company

Inventor： Vikrant Wagle ,  Noktan Mohammed AlYami ,  Abdullah Saleh Hussain Al-Yami ,  Khawlah Alanqari

IPC: C09K8/518 ,  C08G59/24 ,  C08G59/50 ,  C08J9/08 ,  C09K8/508 ,  E21B21/00

CPC classification number: C09K8/518 ,  C08G59/245 ,  C08G59/5006 ,  C08J9/08 ,  C09K8/5086 ,  E21B21/003 ,  C08J2203/02 ,  C08J2363/02

Abstract: A method for mitigating loss circulation zones in a wellbore is provided. The method includes synthesizing a carbamate from an amine-curing agent, and the carbamate is mixed with an epoxy resin from the loss control composition. Chapter loss control composition is pumped into a wellbore with a loss circulation zone, wherein the loss control composition flows into the loss circulation zone. The carbamate of the loss control composition is allowed to decompose at wellbore temperatures, wherein the carbamate releases CO2 gas and the amine-curing agent. The CO2 gas foams the epoxy resin, expanding the epoxy resin to fill voids in the loss circulation zone, and the amine-curing agent cures the foamed epoxy resin, forming a loss control material that seals the loss circulation zone.

公开(公告)号：US12122958B2

公开(公告)日：2024-10-22

申请号：US18114759

申请日：2023-02-27

Applicant: Saudi Arabian Oil Company

Inventor： Vikrant Wagle ,  Noktan Mohammed AlYami ,  Abdullah Saleh Hussain Al-Yami ,  Khawlah Alanqari

IPC: C09K8/518 ,  C08G59/24 ,  C08G59/50 ,  C08J9/08 ,  C09K8/508 ,  E21B21/00

CPC classification number: C09K8/518 ,  C08G59/245 ,  C08G59/5006 ,  C08J9/08 ,  C09K8/5086 ,  E21B21/003 ,  C08J2203/02 ,  C08J2363/02

Abstract: A method for mitigating loss circulation zones in a wellbore is provided. The method includes synthesizing a carbamate from an amine-curing agent, and the carbamate is mixed with an epoxy resin from the loss control composition. The loss control composition is pumped into a wellbore with a loss circulation zone, wherein the loss control composition flows into the loss circulation zone. The carbamate of the loss control composition is allowed to decompose at wellbore temperatures, wherein the carbamate releases CO2 gas and the amine-curing agent. The CO2 gas foams the epoxy resin, expanding the epoxy resin to fill voids in the loss circulation zone, and the amine-curing agent cures the foamed epoxy resin, forming a loss control material that seals the loss circulation zone.