| 摘要 |
FIELD: drilling and operation of wells. SUBSTANCE: device for perforation of channels in casing string has tubular body with side channels, cone with inclined planes and wedges located there and connected piston with cylinder having shoe, hydraulic chamber, spring-loaded cutter, valve located in cone hollow, pushing rod of shutoff member of valve for seal removal of tubing-device system. Cylinder has ports accommodating cutter holders with cutters. Cutter holders are connected with wedges for motion relative to one another. Cutter shanks are freely located in blind recesses of cones preliminarily passed through longitudinal through recesses of wedges. EFFECT: simplified process of perforation and operation of the device. 1 cl, 4 dwg |
