Technological features of drilling of horizontal wells with a difficult profile (on an example of Vankorsky NGKM, the North of Krasnoyarsk Krai

drilling optimization problems on 219.1mm (8 5/8”)section. Methods & theory of drilling 219.1mm section – longest and most difficult. Conventional BHA’s (motor steerable BHA) - most prevalent on Vankorskoe field. Common problem associated with given method weight on bit transfer. In the present report ways of achievement of the set commercial speed of Vankorsky field and the solution of problems arising thus are considered.