Oriented Bent Sub Oriented Bent sub is a a major power deflection tool having a fixed angle a deviated from low end thread of the bent sub to axiaal line of dril stem, the power drill tool under the application of oriented bent sub gives the bit a constant lateral force to ensure that the bit can cut on the well-wall laterally and further drill into a curved well trace.It is divided into two kinds of fixed angle bent sub and variable bent sub.
