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US 2011/0048694 A1Published application
Gripper for coiled tubing injectors
AssigneeServa Group LLC
InventorsJohnnie B. Maschek, JR., Carl Stephen Lammons
Life of this patent
Estimating the term…
Abstract
The current invention relates to an improved gripper for use within a coiled tubing injector unit. The improved gripper comprises a carrier for securing the gripper to the chain drive mechanism of the coiled tubing injector unit and a gripping shoe carried by the carrier. The improved gripper provides a carrier and a gripping shoe designed to permit quick and easy removal and replacement of the gripping shoe in the field during operation of the coiled tubing injector unit.
Claims27
A gripper assembly comprising:
- a carrier, said carrier having an upper surface with at least one arcuate channel;
- a gripping shoe positioned on said carrier, said gripping shoe has at least one downwardly extending leg carrying an inwardly projecting tab;
- wherein said inwardly projecting tab and downwardly extending leg cooperates with said carrier to preclude lateral movement of said gripping shoe while permitting rotational movement of said gripping shoe on said carrier.
A gripper assembly comprising:
- a carrier, said carrier having an upper surface with at least two arcuate channels;
- a gripping shoe positioned on said carrier;
- said gripping shoe having two downwardly extending legs, each leg carrying an inwardly projecting tab;
- wherein said downwardly extending legs and inwardly projecting tabs cooperate with said carrier to preclude lateral movement of said gripping shoe while permitting rotational movement of said gripping shoe on said carrier.
1 more element
A gripper assembly comprising:
- a carrier;
- said carrier having an upper surface
- said carrier having at least two outwardly extending lips;
- said upper surface having a circular channel;
- a gripping shoe positioned on said carrier;
- said gripping shoe having two downwardly extending legs, each leg carrying an inwardly projecting tab;
- wherein said inwardly projecting tabs cooperate with said carrier to preclude lateral and vertical movement of said gripping shoe while permitting rotational movement of said gripping shoe on said carrier.
4 more elements
A gripper assembly comprising:
- a carrier;
- said carrier having an upper surface, a first side and a second side, said first side carrying an outwardly extending lip and said second side carrying an outwardly extending lip;
- said upper surface having two recessed arcuate channels, wherein each recessed arcuate channel has a first open end terminating at said first side of said carrier and a second open end terminating at said second side of said carrier;
- a gripping shoe positioned on said carrier;
- said gripping shoe having two downwardly extending legs, each leg carrying an inwardly projecting tab;
- wherein said inwardly projecting tabs cooperate with said carrier to preclude lateral and vertical movement of said gripping shoe while permitting rotational movement of said gripping shoe on said carrier.
3 more elements
Dependencies are inferred from the claim text.