Patent ID: 7533727
Filing Date: 2009-05-19
Classification: E21B,Y10T

Abstract:
1. An oil well completion tool adapted to be connected to a multiple-section tubing string within an oil well casing and comprising: a tubular assembly having wall structure defining an elongated axially-extending main passage, said assembly having opposed ends with at least one of the ends being adapted to be connected to a section of the tubing string; a severable plug mounted in the tubular assembly in normal blocking relationship to the axial passage; a movable shear cylinder unit in the passage of the assembly provided with a plug-severing edge in normal spaced relationship from a peripheral portion of the plug, said shear cylinder unit being movable through a plug-severing displacement wherein said edge of the shear cylinder unit severs an entire central segment of the plug from a remaining peripheral portion thereof; and separate elongated hinge structure within the assembly connected to the central segment of the plug, said hinge structure being operable to retain the severed central segment of the plug in the main passage of the assembly while allowing the central segment of the plug to bodily shift independent of and in a direction away from said peripheral portion of the plug.