Coiled tubing insider cutter mainly includes insiderhydraulic cutter and insider mechanical cutter, the operation for different situations choose a different cutting method.

IInsider Hydraulic Cutter

The Inside Hydraulic Cutter is designed to cut single strings of casing hydraulically. The cutter features hydraulically activated knives for smooth efficient cutting, an indicator which signals through pump pressure when the cut is complete, and stabilizer slips to keep the cutter anchored in the casing. The pistons are designed to force the slips to firmly anchor the tool prior to the knives contacting the casing.

When the cutter has been run to the desired cutting depth, rotation is initiated and circulation started. An increase in torque indicates that casing is being cut. When the cut is complete, the control dog will move into a recess in the bottom nut causing a decrease in pump pressure, indicating that the cut is complete. Straight pick up will retract the slips and knives.

The Inside Hydraulic Cutter should always be run with a float sub.

Features of Coiled Tubing Insider Cutter

• Tools easily convert to alternate cutting sizes;
• Positive anchor assembly ensures a smooth cut;
• Hydraulic control;
• Knife design reduces risk of damage to outer casing.

Insider Mechanical Casing Cutter

The Insider Mechanical Casing Cutter is used to cut tubing and casing internally.

The Insider Mechanical Casing Cutter is lowered into the hole to the point where the cut is to the point where the cut is to be made. The tool is rotated to the right and gradually lowered. This action allows the friction block assembly to unscrew from the mandrel, thereby anchoring the tool in the pipe. Once the slips are set, the wedge block forces the knives outward until the pipe is cut.

When the cut is complete, pick up the work string; and the friction assembly returns automatically to the run-in position.

An automatic nut design allows the tool to disengage and reset repeatedly without coming out of the hole.
 

Features of Coiled Tubing Insider Cutter

• Each tool easily converts to cut alternate casing weights
• Mechanically operated; no hydraulics are required
• Slip assembly centrally anchors the cutter to ensure a precise, smooth cut
• Knives are made of tool steel or inserts and wear-resisting