Patent ID: 6053250
Filing Date: 2000-04-25
Classification: E21B

Abstract:
Apparatus positionable in a subterranean wellbore, comprising:a tubular first housing having an inner diameter, an end portion, and a radially extending opening formed through said first housing end portion;a tubular second housing having an inner diameter and an end portion, said second housing end portion being radially outwardly and coaxially disposed relative to said first housing end portion;a ball seat;a lug extending radially through said opening and between said first housing end portion and said second housing end portion, said lug releasably securing said first housing against axial displacement relative to said second housing;a flow passage extending through said first and second housings; anda tubular sleeve coaxially disposed within said first housing, said sleeve having an outer diameter radially inwardly adjacent said lug, said sleeve outer diameter radially outwardly biasing said lug, and said sleeve being disposed adjacent said ball seat, such that said sleeve displaces relative to said lug when a first predetermined pressure differential is created across said ball seat, said ball seat expanding when said sleeve displaces relative to said lug,whereby, said lug is released for radially inward displacement when said first predetermined pressure differential is created across said ball seat, said sleeve outer diameter being axially displaced relative to said lug.