DEVICE CREATING PERFORATION CHANNELS IN WELL AND ITS GEAR OF PIERCING ASSEMBLY Russian patent published in 2015 - IPC E21B43/11 

FIELD: oil and gas industry.

SUBSTANCE: device contains a piercing perforator installed on the tubing casing, it contains at least assembled casing, in one casing section a hydraulic drive is installed in form of a hydraulic cylinder with piston-stem, and in the another sections the piercing gear is installed. The piercing gear contains pusher and actuator interacting with each other. The pusher has cone shape with wedge-like end looking down, it is installed in top part and is made with possibility of the reciprocative movement by means of interaction with piston-stem of the hydraulic cylinder. The actuator is installed on the support in bottom part of the section with possibility of movement under work fluid pressure, it is made in form of two short and two long piercers located in mutually perpendicular planes. The piercers rotation points are located in the same plane that is at right angle to the pusher movement axis. The piercers are equipped with punch pins. The actuator is equipped with the water jet channels connected with the work fluid supply system.

EFFECT: simplified design and reduced impact load to actuator, increased device reliability and increased service life.

6 cl, 3 dwg