E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
277/48
E21B 17/07 (2006.01) E21B 10/24 (2006.01) E21B 31/113 (2006.01) F16J 15/32 (2006.01) F16J 15/56 (2006.01)
Patent
CA 1253533
"HIGH-PRESSURE SEALING MEANS FOR LONGITUDINALLY MOVABLE PARTS OF DEEP-WELL DRILLING TOOLS" ABSTRACT: A high-pressure sealing means for two parts of deep-well drilling tools which are longitudinally movable in relation to one another consists of a wearing sealing ring which is disposed in an annular groove in a first part and bears against the second part and a pressure ring which prestresses this radially. The wearing sealing ring has a wall surface extending substantially over its axial length, which seals against the second part . Moreover the ring is smaller than the width of the annular groove of the first part receiving it and is displaceable between the two sides of the annular groove for the selective formation of a static sealing surface at one of the sides of the annular groove. The pressure ring is formed from elastomer material, has a large volume, and is gripped between the wall surface of the wearing sealing ring situated opposite the sealing wall surface and the bottom of the annular groove.
450256
Eastman Christensen Company
Gowling Lafleur Henderson Llp
LandOfFree
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