4. Spring devices
  5. Fluid
  6. Expansible-contractible chamber device

Thomas R. Bishop

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Blowout preventer inner ram seal assembly

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent

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Casing scraper

Wells – Brushing – scraping – cutting or punching-type cleaners – On tubing or casing
Patent

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Deflation resistant tire and insert apparatus

Resilient tires and wheels – Tires – resilient – Cushion and pneumatic combined
Patent

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Fail-safe blowout preventer

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Patent

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Hydraulic well jar

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

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Profile ID: LFUS-PAI-P-308504

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