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Oil India Limited has been granted its first patent by the European Patent Office (EPO) for an invention to improve crude oil production.
A company statement said that the patent is for an invention titled, ‘A method for preventing wax deposition in oil wells with packers.”
The patent grant is a recognition of the uniqueness of the solution provided by OIL to the problem of heavy wax deposition in flowing oil wells completed with packers. Scientists at OIL said that the phenomenon was related to severe wellbore cooling caused by evaporation and condensation of liquid in the annulus, also known as 'wellbore refluxing'.
The solution described in the patent application consists of removing the liquid from the well annulus using a venturi/ ejector device. Such a solution is simple, involves one-time operation and does not interfere with well production.
The patent application for the invention was first filed in the Indian Patent Office in February 2014, based on which an international application was filed as per provisions of Patent Cooperation Treaty (PCT). Subsequently, national phase applications were filed in EPO, USA, Russia and China. The EPO grant comes ahead of other offices, the statement added.
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