Varco Shaffer, Inc.

Varco I/p, Inc.

Tri Canh Le

Melvyn F Whitby

Christopher Dale Johnson

George Tisdale

David L O'Donnell

Esteban Palomo, Jr

Christopher D Johnson

Esteban Jr Palomo

George W Tisdale

A blowout preventer having a main body, a ram system with ram apparatus, a movement system with movable shaft apparatus connected to the ram apparatus, the ram apparatus movable from a first open-ram position to a second closed-ram position, the movable shaft apparatus including a locking shaft portion having a tapered portion, a locking system for selectively locking the ram apparatus in the closed position and having locking member apparatus having a primary tapered surface in contact with the locking shaft portion which is movable with the so that the primary tapered surface contacts the tapered portion of the locking shaft portion to releasably lock the movable shaft apparatus.

Blowout preventer and locking mechanism

The shear ram assembly for shearing an oil well tubular T includes a first ram axially moveable along the first axis for moving an upper blade , and an opposing second ram axially moveable along the second ram axis for moving a lower blade . An upper planar surface of the lower blade passes closely adjacent a lower planar surface of the upper blade as the blades move towards each other to shear the tubular. The sealing system is positioned within a recess in the upper surface of the lower blade, and includes an elastomeric seal for sealing engagement with the lower planar surface of the upper blade and a rigid actuator moveable relative to the lower blade to energize the elastomeric seal.

Shear ram assembly

A hydraulically controlled blowout preventer 10 and method are disclosed for simultaneously moving two sealing assemblies 24, 27 to seal around an oilfield tubular 15 within the bore 14 of BOP 10. A single manual operator 20 may be rotated to simultaneously move master piston 26 and hydraulically interconnected slave piston 79 inwardly toward bore 14 or outwardly away from bore 14, respectively. BOP 10 is field convertible to purely hydraulic operation by disconnecting the threaded shaft 52 from master piston 26. Hydraulic lines 36 and 40 interconnect between cylinders 30 and 82 to result in simultaneous operation of seal assemblies 24, 27.

Hydraulically controlled blowout preventer

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Spring, TX, United States of America

Tri Canh Le