TAPER MILL

       The taper mill are mainly used to repair the deformed fish top or trim the curling of the casing at the butt hoop of various tools and the burrs and flaring caused by perforation during the drilling process, and to clean up the mineral crystallization and other hard sundries trapped on the shaft wall, so as to restore the size.  Conical shoes are composed of conical body and YD alloy surfacing or insert welding hard alloy, as shown in the figure.  The taper of the cone is 30°, the cone is wing like, and the surface of the cone of the wing is welded with carbide.  The upper part of the shoe is a drill pipe thread, connected to the drill pipe, and the cylinder has a centering block to prevent severe milling of the casing wall during the operation.  There are 3-5 flume along the axial direction, and the body has straight-through or bypassing water holes from top to bottom to ensure smooth well cleaning. The taper mill are by the alloy on the cone milling protruding casing wall and stranded in the casing wall crystals and other impurities.  The cylinder section acts as a stabilizer, and the milling debris is carried back to the surface by the well cleaning fluid.      

CONCAVE MILL

ECONOMILL

      Economill is a kind of tool for grinding the falling objects. Such as grinding bit, cone, drift, slip teeth, washpipe, sub, deep well pump accessories, and other falling objects. As the structure is shown in the figure, it is composed of body and carbon tungsten alloy. The body is composed of two sections of cylinder, the upper part of the small cylinder is a connection thread, the connection thread can be made into pin thread or box thread according to user's requirement. The bottom and side of the large cylinder have a water groove, the bottom of the water groove is opened with a mud circulation hole, YD alloy or other wear-resistant materials between the water groove.

BLADED MILL

     Blade junk mill is a tool for grinding fallen objects in wells. Such as grinding drill bits, cones, drift, slips, flushing pipes, drill tool joints, deep well pump accessories and other fallen objects, because the blade can prevent the fishes from being slanted.       It is composed of a joint and wear-resistant alloy or alloy button. The body is equipped with the blade to prevent abrasion deviation when the fish is milled. The blade junk mill relying on the YD alloy protruding from the bottom surface and under the action of drilling pressure eat and grind the fallen objects, and the wear debris is brought out of the ground with the circulating well flushing fluid.