Shearing tool and methods of use

A method of removing a retrievable tool with fins from a drill string, wherein the method comprises the steps of:

• inserting a retrievable tool into a drill string, wherein the retrievable tool comprises a downhole tool comprising a member selected from the group consisting of:
• a meaure-while-testing tool, a steering tool, an EM pulse tool, other downhole tools, and combinations thereof;
• inserting a shearing tool into the drill string;
• shearing fins on the retrievable tool with the shearing tool by pulling the retrievable tool through the shearing tool with a force greater than or equal to eighty pounds;
• and
• pulling the sheared retrievable tool through a diameter reduction in the drill string to the surface.

A method of removing a retrievable tool with fins from a drill string comprising the steps of:

• placing a retrievable tool with fins in a drill string;
• inserting a shearing tool into a box end of a first section of the drill string above the retrievable tool and below any reduction in the interior diameter of the drill string;
• securing the shearing tool in the drill string;
• retrieving the retrievable tool;
• and
• shearing the fins of the retrievable tool during retrieval by providing the shearing tool with a flange for locking the shearing tool in place between a first section of the drill string and a second section of the drill string, providing the shearing tool with a cutting surface for shearing objects pulled through the shearing tool, and pulling the retrievable tool through the shearing tool.

A shearing tool for trimming objects being pulled through a drill string comprising:

• a body having a channel, wherein the body comprises a first end, a second end, and an exterior, wherein the first end comprises a radially extending flange for securing the body in the drill string, and wherein the radially extending flange is tapered to fit in a box end of a section of the drill string;
• a plurality of spacers mounted on the exterior of the body for centralizing the body in the drill string;
• and
• a cutting surface on the second end of the body, wherein objects pulled through the channel are trimmed by the cutting surface.