Patent ID: 8960331
Filing Date: 2015-02-24
Classification: E21B

Abstract:
1. A bottom hole assembly for a drill string, comprising: a mud motor disposed on the drill string and having a rotor and a stator, the rotor defining a first bore; a mandrel disposed downhole from the mud motor and defining a second bore; a shaft defining a third bore and having first and second ends, the first end coupled to the rotor with a first universal joint, the second end coupled to the mandrel with a second universal joint; and an inner beam disposed in the third bore of the shaft, the inner beam having an internal passage and having third and fourth ends, the third end sealing communication of the internal passage past the first end of the shaft at the first universal joint with the first bore of the rotor, the fourth end sealing communication of the internal passage past the second end of the shaft at the second universal joint with the second bore of the mandrel.