4. Rotary shafts, gudgeons, housings, and flexible couplings for ro
  5. Coupling accommodates drive between members having...
  6. Coupling transmits torque via radially directed pin

Houston Engineers, Inc.

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Constant velocity universal joint assembly for downhole motor

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Coupling accommodates drive between members having... – Coupling transmits torque via radially directed pin
Patent

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Hydraulic jar

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
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Hydraulic jar

Wells – With jar means for releasing stuck part
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Hydraulic jar with improved detent ring

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
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Jar enhancer

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