Patent ID: 9580994
Date: 2017-02-28
CPC Classifications: E21B

Claim:
1. A packer comprising: a body having a central bore; an upper sealing element connected to an exterior of the body; a lower sealing element connected to the exterior of the body; a treatment port, the treatment port permitting fluid communication between the central bore and the exterior of the body between the upper and lower sealing elements; an upper equalization port, the upper equalization port permitting fluid communication between the central bore and the exterior of the body above the upper sealing element; and a sleeve positioned within the central bore, wherein the sleeve may be moved to selectively permit fluid communication through the treatment port and the upper equalization port, the sleeve comprises a closed end and an inner wall that separates a secondary cavity from a main cavity within the sleeve, the secondary cavity in fluid communication with an exterior of the sleeve through at least one opening in the sleeve.