The invention provides a single-stage efficient emergency
cutting tool and an assembling method thereof. The single-stage efficient emergency
cutting tool comprises a first part, a starting device, a second part, an emergency
cutting device, a third part and a safety device. One end of the starting device is connected with the emergency cutting device and the other end is connected with the
hand pump; the starting device is used for compressing a disc spring in the emergency cutting device of the second part, and elastic
potential energy is provided for well descending cutting of a
cutting tool in the emergency cutting device through the disc spring. The emergency cutting device adopts a disc spring
mechanical energy storage and release principle to quickly
cut a steel wire or a cable through a
cutting tool; the safety device is installed at the front end of the emergency cutting device, plays a role in safety protection in the assembling process and plays a role in misoperation prevention before cutting. According to the invention, steel wires or cables can be safely and efficiently
cut in a high-
viscosity fluid well and an inclined well, and a
solid guarantee is provided for the success rate and reliability of operation.