Fike Corporation

Mark Burris

Donald R Hibler, Jr

John A Barton

Daniel G O'Halloran

Joel Wicoff

Donald R Hibler Jr

Daniel O'HALLORAN

An oil well completion tool having a tubular assembly defining an elongated main passage is adapted to be connected to a multiple-section tubing string within an oil well casing. A severable plug is mounted in the tubular assembly in normal blocking relationship to the passage. A movable shear cylinder unit has a plug-severing edge operable to sever an entire central segment of the plug from a remaining peripheral portion thereof. Separate hinge structure has an elongated U-shaped leg portion connected to the central segment of the plug. The leg portion of the hinge structure, which undergoes elongation, 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 plug. The severed central segment is received in a recess therefor in the tubular assembly wall structure in order to prevent interference of the severed central plug segment with the main passage.

Oil well completion tool having severable tubing string barrier disc

An improved dump valve assembly ( ) is provided for use as a part of an elongated, sectionalized, tubular downhole pipe string ( ). The assembly ( ) includes a tubular pipe section ( ) having endmost threading ( ) and a rupture disc fitting ( ); the fitting ( ) includes a metallic, preferably concavo-convex disc ( ) with preformed lines of weakness ( ) on one face thereof. The section ( ) is interconnected between a pair of lower pipe sections ( ). In operation when it is desired to elevate the string ( ) from the well, the fluid within the string ( ) is pressurized sufficiently to rupture the disc ( ), thereby allowing fluid within the string ( ) to drain. The string ( ) and other well components can then be removed from the well without contamination owing to spillage from the tubular string ( ).

Dump valve assembly for selective draining of liquid from an oil well pipe stream

An improved dump valve assembly ( ) is provided for use as a part of an elongated, sectionalized, tubular downhole pipe string ( ). The assembly ( ) includes a tubular pipe section ( ) having endmost threading ( ) and a rupture disc fitting ( ); the fitting ( ) includes a metallic, preferably concavo-convex disc ( ) with performed lines of weakness ( ) on one face thereof. The section ( ) is interconnected between a pair of lower pipe sections ( ). In operation when it is desired to elevate the string ( ) from the well, the fluid within the string ( ) is pressurized sufficiently to rupture the disc ( ), thereby allowing fluid within the string ( ) to drain. The string ( ) and other well components can then be removed from the well without contamination owing to spillage from the tubular string ( ).

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Iola, KS, United States of America

Mark Burris