Internal Pipe Cutter is a simple hydraulic actuated pipe cutter, efficient tools for cutting tubing, casing or drill pipe. Manufactured to exacting standards, Internal Cutters permit the redressing of a basic assembly in order to cut alternate sizes of pipe. Internal Cutters are used to cut tubing, casing or drill pipe. They may be run on sucker rods, tubing, or drill pipe, depending upon the diameter of the pipe to be cut.
Internal Pipe Cutter is consisting of a Body, with multiple Knives and Knife Pins: actuated by a Piston with a Pressure Relief Valve System consisting of a Flow Bushing, Valve Stem, Flow Bean Retainer, Valve Stop Spider, Flow Bean, and Set Screws.
The Cutter is attached to the drill pipe or tubing. The knives are wired to retain them in the groove and lowered to the desired depth. Rotation is started (usually 30 to 50 rpm). The pump is turned on, usually to 900 psi. The cutter is held in one position while cutting, and the piston forces the knives through the pipe. When the knives reach the preset diameter, the piston will separate from the valve stem and provide more mud flow through the tool, causing a marked decrease in pump pressure, indicating the knives have severed the pipe. The pump pressure indication is preset by a simple adjustment, allowing the knives to extend at exactly the desired diameter.