ROPE PACKER FOR PRODUCTION OR FLOW STRINGS MULTIPLE INTERVAL-BY-INTERVAL TESTING Russian patent published in 2011 - IPC E21B33/12 

FIELD: gas and oil production.

SUBSTANCE: packer consists in moveable rod and stop bush with opener connected through head. A self-packing collar is arranged under the opener above a cone. Also, the moveable rod is connected with an equaliser from beneath. They both axially travel relative to un upper hollow cylinder secured in an upper part of the cone and set between the self-packing collar and a moveable rod. In a lower section of the cone there is secured a lower hollow cylinder located between the equaliser and an anchoring unit with a ram holder. The ram holder is connected with a case with through orifices for a centrator. Inside the case there is set a unit of the back valve, while in a lower section - a unit opposing medium flow and facilitating axial travel of the case with the ram holder upward and actuation of the anchoring unit for creation of load on the self-packing collar through the opener.

EFFECT: increased functionality of rope packer.

3 dwg