公开(公告)号：WO2023019047A1

公开(公告)日：2023-02-16

申请号：PCT/US2022/073489

申请日：2022-07-07

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： ROMER, Michael, C. ,  GRASSO, Giovanni, A.

IPC: E21B37/06 ,  E21B43/12 ,  E21B41/02 ,  F16L58/04

Abstract: Methods for the in-situ application of coating agent to production tubing within wellbores using plunger lift systems are provided herein. One method includes shutting in the wellbore, pressurizing the production tubing to displace fluids from the production tubing, and dropping a plunger from the surface into the production tubing such that the plunger travels toward the bottom of the production tubing until landing on a bumper spring. The method also includes pumping a predetermined amount of the coating agent from the surface into the production tubing such that the coating agent flows to the bottom of the production tubing and settles on top of the plunger and utilizing the differential pressure between the production tubing and the annulus to return the plunger and the coating agent to the surface, where the coating agent is applied to the inner diameter of the production tubing as it flows toward the surface.