Patent ID: 9617823
Date: 2017-04-11
CPC Classifications: E21B

Claim:
1. An apparatus for sealing against a bore in a soil formation comprising: an elongate central member; a resilient tubular seal member surrounding said elongate central member and extending between first and second ends; a longitudinally moveable plunger surrounding said central member and having a first wedge engagable upon said first end of said seal member; and a backing ring engaging upon said second end of said seal member, wherein the plunger is axially movable along said central member to compress said seal member between the plunger and said backing ring and to press said first end of said seal member in a radially outward direction; wherein said seal member includes a metallic inelastic ring disposed at the first end thereof corresponding to said plunger, said inelastic ring being formed of a plurality of segmented fingers.