Tatneft Implements Corrosion Protection Project

In the framework of the large-scale effort to ensure environmental safety during crude oil production OAO TATNEFT is implementing a number of promising projects, including the one for corrosion protection of pressure maintenance oilfield equipment for the purpose of minimizing the rate of is failures.

To this effect a program of running the anticorrosive performance tubing into of injection wells is implemented in the Company, which allows increasing the tubing service life in the wells by 2-2.5 times. As a result of the work during the period of 2004-2009 protection of existing active injection well stock through application of anticorrosive performance tubing used for injection of effluent water exceeded 77%.

At the same time the program provides for introduction of highly reliable M1-X packers into the injection wells, which taken together with application of the anticorrosive performance tubing ensures reliable protection of the well production casing the from high pressure and corrosion. Described packers were installed in more than 2 thousand injection wells.

Implementation of these programs will reduce the cost of wells repair with concurrent reduction of polluting the bottomhole zone with corrosion products, as well as reduce the costs of the well survey. The total cumulative estimated economic effect of implementing these programs will exceed 900 million rubles for the period of 2004-2009.