Method and tool for repairing damaged threads

A method of repairing damaged threads on threaded objects, comprising the steps of:

• assembling a pair of chaser sections about an area of the threaded object to be repaired rearward of the damaged threads, the chaser sections having internal threads substantially matching those of the threaded object, an outer periphery tapering toward the damaged threads, and a longitudinal keyway in the outer periphery;
• engaging a driver having a tapered inner diameter with the tapered outer diameters of the pair of chaser sections assembled about the threaded object and locking the chaser section to the driver with a pair of keys;
• exerting pressure on the driver toward a large taper of the chaser sections and simultaneously rotating the driver to draw the chaser sections over the damaged threads thereby straightening the damaged threads to provide a useable threaded object.

A thread repair tool capable of repairing damaged threads on a threaded object comprises:

• at least two chaser sections each having a threaded inner diameter, the threads matching those of the threaded object to be repaired, each chaser section having a tapered outer diameter and a longitudinal keyway in the tapered outer diameter;
• and
• a driver having a tapered inner diameter substantially matching the tapered outer diameter of the chaser sections, and having a pair of keys spaced apart to match engagement with the keyways of the chaser sections.