OIL WELL COMPLETION TOOL HAVING SEVERABLE TUBING STRING BARRIER DISC

摘要

An oil well completion tool having a tubular assembly defining an elongat ed main passage is adapted to be connected to a multiple-section tubing stri ng within an oil well casing. A severable plug is mounted in the tubular ass embly in normal blocking relationship to the passage. A movable shear cylind er unit has a plug-severing edge operable to sever an entire central segment of the plug from a remaining peripheral portion thereof. Separate hinge str ucture has an elongated U-shaped leg portion connected to the central segmen t of the plug. The leg portion of the hinge structure, which undergoes elong ation, is operable to retain the severed central segment of the plug in the main passage while allowing the central segment of the plug to bodily shift independent of and in a direction away from the peripheral portion of the pl ug. The severed central segment is received in a recess therefor in the tubu lar assembly wall structure in order to prevent interference of the severed central plug segment with the main passage.