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Drill spring tension limiting device for floating drilling vesse

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Drill string heave compensator and latching apparatus

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Drive mechanism for a line-pulling apparatus

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Electric hoist

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Emergency descent device

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Engagement devices

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Escape device

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Extensible supporting strut

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Reexamination Certificate

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Extension rod unit

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Reexamination Certificate

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Extraction device for ditch sheeting elements

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Fastening for a hydraulic motor

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Flag hoist

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Fluid actuated dynamic brake

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Fluid pressure-controlled winch mechanism

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Force feedback controlled winch

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Gantry cranes

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Gimbaled sheave with cable angle sensors

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Gripper assembly for moving drilling rigs

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Clutch actuated
Patent

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Gripper system for moving drilling rigs

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Clutch actuated
Patent

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Gripping and skidding apparatus

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Clutch actuated
Patent

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