Patent ID: 11898412
Assignee: OIL LIFT TECHNOLOGY INC.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A rod lock out clamp for use on a well bore in a production oil, water or gas well installation, the lock out clamp comprising:
a housing having a central bore for receiving a rod in spaced relation therethrough;
clamp members in the housing for grippingly and frictionally engaging the rod in the bore, at least one of the clamp members having an inner end and a recess in the inner end, the recess having a profile with an arcuate portion having a radius of curvature that reduces from a maximum radius to a minimum radius, wherein the at least one clamp member comprises a generally cylindrical body; and
manipulating means coupled to the housing and the clamp members for moving the clamp members between a rod gripping position in which the clamp members grippingly engage the rod to prevent rotation or axial movement thereof, and a retracted position in which the clamp members are removed from the rod to permit rotational and axial movement of the rod in the bore.