Patent ID: 8776889
Filing Date: 2014-07-15
Classification: E21B,Y10T

Abstract:
1. A downhole tool, comprising a housing defining a tubular bore therethrough; a seating rim disposed about the tubular bore in the housing and having a first distal end and a first proximal end, a first planar profile of the seating rim defining a first distal perimeter at the first distal end and defining a first proximal perimeter at the first proximal end, the first proximal perimeter being asymmetrical relative to the first distal perimeter across a first centerline dividing the first distal end and the first proximal end such that the first distal perimeter has a first shape being different from a second shape of the first proximal perimeter, a flapper disposed in the housing and having a second distal end and a second proximal end, the flapper being pivotable at the second proximal end relative to the seating rim, the flapper having a sealing rim disposed about an inside surface for sealably engaging against the seating rim, a second planar profile of the sealing rim defining a second distal perimeter at the second distal end and defining a second proximal perimeter at the second proximal end, the second proximal perimeter being asymmetrical relative to the second distal perimeter across a second centerline dividing the second distal end and the second proximal end such that the second distal perimeter has a third shape being different from a fourth shape of the second proximal perimeter,