Abstract
Controllable rotor systems are the innovation of the drilling tool enabling to manage the well path decreasing failure and complication risk. The rig in this system moves by set path with continuous motion of drill string. The rotation of drilling tool provides the effective well cleaning, reduces the drilling tool sticking and allows drilling deep wells and those with complicated profile compared to the drilling with bottomhole engine. The most complicated circumstance for obtaining required drilling rate is the maintenance of enough load transmission from the earth surface to the rig regardless the boundary conditions between the well and drilling tool.
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