Patent ID: 8833455
Filing Date: 2014-09-16
Classification: E21B

Abstract:
1. A method of repairing a well having a casing, comprising: positioning a tool in the well; locking the tool in place with a clamping system; orienting the tool axially and azimuthally with a positioning system; drilling a hole through the casing into a region behind the casing to be treated with a drilling device having a drill bit; pumping a repair fluid from a reservoir in the tool to the region behind the casing for repairing a cement fault in said region with a pumping system, wherein the repair fluid includes magnetic particles and the tool includes a rotor with magnets having poles aligned in a radial direction; rotating the magnets once the repair fluid has been pumped into an annulus region behind the casing to be repaired so as to generate a magnetic flux creating fluid flow in the annulus and a ring of fluid; and plugging the hole drilled in the casing with a plugging device after the cement fault in the region behind the casing has been repaired.