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1. (WO2016178805) CV JOINT FOR DRILLING MOTOR AND METHOD

Pub. No.:    WO/2016/178805    International Application No.:    PCT/US2016/027400
Publication Date: Fri Nov 11 00:59:59 CET 2016 International Filing Date: Fri Apr 15 01:59:59 CEST 2016
IPC: E21B 4/00
E21B 17/02
Applicants: ASHMIN HOLDING LLC
Inventors: VON GYNZ-REKOWSKI, Gunther HH
HERBEN, William, C.
Title: CV JOINT FOR DRILLING MOTOR AND METHOD
Abstract:
A CV joint for a downhole drilling motor includes a center shaft including a top shaft section and a bottom shaft section. The top shaft section is at least partially housed within a cavity of a first insert, which is housed within a cavity of a rotor adapter. The bottom shaft section is at least partially housed within a cavity of a second insert, which is housed within a cavity of a drive shaft adapter. An outer surface of the top and bottom shaft sections may include multiple top shaft pockets and multiple bottom shaft pockets, respectively. The first and second inserts may each include a series of recesses. Top shear members may be partially housed within the top shaft pockets and the recesses of the first insert. Bottom shear members may be partially housed within the bottom shaft pockets and the recesses of the second insert.