Patent ID: 11879308
Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E

Claim 0:
1. A method for in-situ application of a coating agent to a production tubing within a wellbore using a plunger lift system, comprising:
shutting in the wellbore;
pressurizing the production tubing to displace fluids from the production tubing;
dropping a first plunger from a surface into the production tubing such that the first plunger travels toward a bottom of the production tubing until landing on a bumper spring;
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 first plunger;
dropping a second plunger from the surface into the production tubing such that the second plunger acts as a cap for the coating agent; and
utilizing a differential pressure between the production tubing and an annulus of the wellbore to return the first plunger, the second plunger, and the coating agent to the surface, wherein the coating agent is applied to an inner diameter of the production tubing as the coating agent flows toward the surface.