Patent ID: 7775272
Filing Date: 2010-08-17
Classification: E21B

Abstract:
1. A passive centralizer for centralizing a tool within a well wall, the centralizer comprising: a support body; an arm coupled to said support body; a retention mechanism comprising: a deployment mechanism coupled to said retention mechanism and moveable to disengage at least a portion of the retention mechanism from the arm to allow for a radial expansion of the arm away from said support body and into contact with the well wall, wherein said retention implement comprises deflectable deployment projections having raised teeth to interface said deployment collar for the immobilizing, and wherein a deflection of the deployment projections allows for said disengagement of at least a portion of the retention mechanism from the arm to allow for said radial expansion of the arm, wherein said deployment mechanism comprises a retractable platform sleeve to support said deflectable deployment projections, and wherein a movement of the retractable platform sleeve allows for said deflection of the projections.