POWER SECTION AND TRANSMISSION OF A DOWNHOLE DRILLING MOTOR

  • US 20160245022A1
  • Filed: 02/25/2015
  • Published: 08/25/2016
  • Est. Priority Date: 02/25/2015
  • Status: Active Grant
First Claim
Patent Images

1. A transmission coupling for use in a downhole drilling motor, comprising:

  • a shaft for transmitting torque from an upstream power section of the downhole drilling motor to a drive shaft of the downhole drilling motor;

    a first connector disposed over a first end of the shaft to couple the first end of the shaft to a first component of the downhole drilling motor;

    a first pair of ball bearings disposed between the shaft and the first connector, wherein the first pair of ball bearings are radially offset from each other by approximately 180 degrees about a longitudinal axis of the shaft; and

    a first sliding connection disposed between the shaft and the first connector to enable the first pair of ball bearings to move opposite from one another in a direction substantially parallel to an axis of the first connector.

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