PACKED FOR SHUTDOWN OF INTERNAL SPACE OF PIPE STRING Russian patent published in 1997 - IPC

FIELD: construction and repair of oil and gas wells, in particular, for isolation of formations in well from each other and for separation of space inside pipes. SUBSTANCE: packer includes hollow body with hydraulic chamber and distance plug. Rigidly connected to plug is rod. Packer also has sealing member with axial channel for distance plug. Internal surface of body has bore and connector with holes. This connector separates the cavity into parts. Outer surface of spacer plug has thread. Sealing member upper end is located in bore. Hydraulic chamber is formed by body inner bore wall, upper end of sealing member and lower end of connector. Connector holes communicate one part of body cavity above connector with hydraulic chamber. EFFECT: simplified design of packer and enhanced its serviceability. 2 dwg