Patent ID: 9506322
Filing Date: 2016-11-29
CPC Classification: E21B

Claim Text:
1. A downhole tool comprising: a tubular structure; and an annular plug seat coaxially supported within the interior of said tubular structure and being expandable from a diametrically compressed orientation to a diametrically expanded orientation, said annular plug seat including a series of arcuate rigid peripheral circumferential segments that circumferentially overlap one another in a manner blockingly preventing axial separation of any segment from the rest of said segments, wherein facing ends of each circumferentially adjacent pair of said segments circumferentially overlap each other at multifaceted, puzzle-cut juncture areas that serve to prevent, by means of a blocking action between each given segment and the two segments between which it is interposed, axial separation of the given segment from the balance of said plug seat.