4. Fluid handling
  5. Line condition change responsive valves
  6. Safety cut-off requiring reset

Clarence W. Johnson

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Casing hanger

Pipe joints or couplings – Serial,relatively movable portions – Linked ball and socket portions
Patent

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Cushion connector

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Including member deformable by relative movement between shafts
Patent

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Floating cushion sub

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Including member deformable by relative movement between shafts
Patent

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High-low indicator

Fluid handling – With indicator – register – recorder – alarm or inspection means – Plural
Patent

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Mobile drilling apparatus

Tool driving or impacting – Advance causing or controlling means – Motor causes or controls advance
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Profile ID: LFUS-PAI-P-63981

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