Patent ID: 7210529
Filing Date: 2007-05-01
Classification: E21B

Abstract:
1. A casing brush tool for cleaning the walls of a well casing, comprising: a first brush body and a second brush body; a first sleeve mounted in a free rotational relationship about said first brush body, said first sleeve carrying a plurality of non-axial rows of bristles for contacting the walls of the well casing; a second sleeve mounted in a free rotational relationship about said second brush body, said sleeve carrying a plurality of non-axial rows of bristles disposed about said second sleeve, wherein said bristles of the second sleeve, when contacting the wall of the well casing, cause rotation of the second sleeve in a second predetermined direction about a central axis of the second brush body; and wherein said second sleeve rotates in the second predetermined direction opposite to the predetermined direction of rotation of said first sleeve.