Packer Backup Ring with Closed Extrusion Gaps
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[0029]FIGS. 10 and 11 illustrate the juxtaposition of a sealing element 10 next to a backup ring 12. FIG. 2 shows an end view of a continuous single ring 14 that can be disposed next to a sealing element 10. Ring 14 has an inside diameter 16 and an outside diameter 18. There are alternating l-shaped slots 20 and 22 that start at the outside diameter 18 and at the inside diameter 16. FIG. 2 shows a tapered or sloping side 24 and slots 20 and 22 that alternate as to the location of the long dimension of the l-shaped slot. Sloping side 26 is not seen in FIG. 2 but is shown as FIG. 3 as well as the cylindrically shaped inside surface 28 that defines the inside diameter 16. FIGS. 1 and 4 both show an outside view where it is seen that slot 22 is a segment that goes to outside diameter 18 has a continuation slot segment 22′ that is circumferentially offset a few degrees. Slots 22 and 22′ are at opposed ends of an oblong bore 22″ that may have internal supports. Bore or opening 22″ is seen...
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Abstract
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