Patent ID: 6681853
Filing Date: 2004-01-27
Classification: E21B

Abstract:
A tool to prevent rotation of a downhole tool suspended in a wellbore casing comprising:a tubular housing having a wall for engaging the casing and having at least one end for connection to the downhole tool; a jaw having a radial tip and which is rotatable along an axis along a wall of the housing opposing the casing engaging wall for varying the effective diameter of the tool, and a spring, acting between the jaw and the housing so as to bias the jaw outwardly to a first casing-engaging position wherein the radial tip is positioned outwardly from the housing to increase the tool's effective diameter so that the radial tip engages the casing and the housing wall engages the casing for arresting tool rotation and further, to permit a second compressed position wherein the jaw is temporarily compressed towards the housing for minimizing the tool's effective diameter and permitting movement within the casing.