Patent ID: 9637997
Date: 2017-05-02
CPC Classifications: E21B

Claim:
1. A packer for use on a tubing string in a borehole, the tubing string having a downhole component downhole of the packer and having an uphole component uphole of the packer, the packer comprising: a swellable element for sealing in the borehole disposed on the packer and having first and second ends, the first end disposed toward the downhole component on the tubing string, the second end disposed toward the uphole component on the tubing string; first and second end rings disposed on the packer respectively outside the first and second ends of the swellable element; first and second compressible elements disposed on the packer respectively outside the first and second end rings; a first setting mechanism disposed on the packer adjacent the first compressible element and being actuatable toward the first compressible element, the actuated first setting mechanism compressing at least the first compressible element against the first end ring, the compressed first compressible element limiting extrusion of the swellable element beyond the first compressible element; and a second setting mechanism disposed on the packer adjacent the second compressible element and being actuatable toward the second compressible element, the actuated second setting mechanism compressing at least the second compressible element against the second end ring, the compressed second compressible element limiting extrusion of the swellable element beyond the second compressible element wherein the first setting mechanism is actuated before the second setting mechanism in response to tubing pressure in the tubing string communicated to the downhole component on the tubing string; and wherein the second setting mechanism is actuated after the first setting mechanism in response to borehole pressure communicated to the borehole from the uphole component on the tubing string.