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The Oriented Bent Sub
The oriented bent sub is a major power deflection tool having a fixed anglel(¡¤¨¢)deviated from low end thread of the bent sub to axial line of drill stem¡ê?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.

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