4. Rotary shafts, gudgeons, housings, and flexible couplings for ro
  5. Flexible coupling between fluid-conducting rotary shafts
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Down-hole motor universal joint

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Relative angular displacement of axes of shafts
Patent

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Downhole motor universal joint assembly

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Relative angular displacement of axes of shafts
Reexamination Certificate

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Drilling motor coupler

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts
Reexamination Certificate

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Drive line for down hole mud motor

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Relative angular displacement of axes of shafts
Reexamination Certificate

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Drive shaft assembly for a downhole motor

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts
Reexamination Certificate

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