DEVICE FOR HEATING OF WELL CASING PIPES

摘要

devices for recovery of viscous oils containing asphalto-resinous sediments and designed for reduction of filtration resistance of bottom-hole formation zone by method of its heat treatment. SUBSTANCE: device is adapted for heating casing pipes in place of device location. Device coil is supplied with high-frequency current and made in form of helical slow- wave structure located on ceramic case which is moved along casing pipe. Relative values of length, diameter and winding pitch of helical slow-wave structure and also diameter of spiral wire are offered. Supply frequency exceeds the commercial frequency of 59 Hx by a factor of 200- 2000. Efficiency of offered device does not depend on flow rate of oil in casing pipe. Considerably increased is efficiency of energy transmission to casing pipe in point of heater location. EFFECT: reduced resistance to filtration of bottom-hole formation zone due to its heat treatment. 1 dwg