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US 8,191,620 B2Granted
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 device relates to a gripper assembly for use within a coiled tubing injector unit. The gripper assembly 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 configuration of the gripper assembly permits quick and easy removal and replacement of the gripping shoe.
Claims25
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 and said gripping shoe has an upper surface configured to grip coiled tubing;
- 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 and wherein in the assembled configuration, said upper surface of said gripping shoe defines the central axis of said gripper assembly.
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 and said gripping shoe has an upper surface configured to grip coiled tubing;
- 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, wherein in the assembled configuration, said upper surface of said gripping shoe defines the central axis of said gripper;
- wherein in the assembled configuration, said inwardly projecting tabs cooperate with said carrier to retain said gripping shoe on said carrier.
2 more elements
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 and said gripping shoe has a concave upper surface configured to grip coiled tubing;
- 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, wherein in the assembled configuration, said upper surface of said gripping shoe defines the central axis of said gripper assembly and wherein said outwardly projecting lips are positioned on the central axis of said gripper assembly.
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 and said gripping shoe has an upper surface configured to grip coiled tubing;
- 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, wherein in the assembled configuration, said upper surface of said gripping shoe defines the central axis of said gripper assembly and wherein said outwardly projecting lips are positioned on the central axis of said gripper assembly;
- and,
- wherein in the assembled configuration, said inwardly projecting tabs cooperate with said carrier to retain said gripping shoe on said carrier.
5 more elements
Dependencies are inferred from the claim text.