Securing this first-ever patent grant signifies a major milestone for OIL and especially its Research& Development (R&D) Unit, which actively develops innovative solutions to oilfield exploration and production problems and has filed few other patent applications in recent years.
The patent grant amounts to 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 have studied the problem and attributed it to phenomenon related to severe wellbore cooling caused by evaporation and condensation of liquid in the annulus, also known as 'well bore 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.
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,Russiaand China. The EPO grant comes ahead of other offices.
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