Used to mill out broken pipe, couplings, balls, valves and other objects that have fallen downhole.
Bottomhole cleaning
Removes cement bridges, paraffin and salt deposits.
Landing site preparation
Levels and cleans the surface of casing for installing packers, valves and other equipment.
Emergency response
Drills out seized drill string elements or emergency catching tools.
Design and principle of operation
The FT is a massive metal disk with carbide cutters on the working surface. It is attached to the drill string and lowered into the borehole, where under the action of rotation and axial load it mills obstacles.
The main types of end milling cutters:
Flat milling cutters - used for cutting off ledges and scraping the bottom hole.
Cone cutters - useful for drilling out small objects.
Combination milling cutters - combine the functions of destruction and removal of milled material.
Advantages of FT:
Effectively removes any solid obstructions in the borehole
Reduces emergency response time
Provides quality bottom hole cleaning before further operations