Patent ID: 9657520
Date: 2017-05-23
CPC Classifications: E21B

Claim:
1. A downhole assembly for a drill string, the assembly comprising: a motor disposed on the drill string and having a rotor driven by flow of drilling fluid, the rotor defining a first bore; a mandrel disposed downhole from the motor and defining a second bore; a shaft transferring the drive of the rotor to the mandrel, the 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 first and second inner beams disposed respectively at the first and second ends of the shaft coupled to the first and second universal joints, the first and second inner beams sealing communication of the first bore of the rotor with the second bore of the mandrel through the third bore of the shaft, wherein at least one of the first and second inner beams defines an internal passage and has a proximal end and a distal end, the distal end sealing communication of the internal passage with the respective at least one of the first bore of the rotor and the second bore of the mandrel, the proximal end sealing communication of the internal passage with the third bore of the shaft, and wherein the proximal end of the at least one inner beam comprises a jointed end pivotably sealed in the third bore of the shaft.