Axially compressed and radially pressed seal

摘要

An apparatus and method for sealing against a bore in a soil formation. The apparatus comprises an elongate central member having a resilient tubular seal member extending between first and second ends therearound, a longitudinally moveable plunger surrounding the central member having a first wedge engagable upon the first end of the seal member and a backing ring engaging upon the second end of the seal member. The plunger is axially movable along the central member to compress the seal member between plunger and the packing ring and to press the first end of the seal member in a radially outward direction. The method comprises a locating the apparatus at a desired location and axially moving the plunger towards a corresponding backing ring so as to compress the seal member between plunger and the packing ring and to press the seal member in a radially outward direction.

主权项

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.