A risk/reliability assessment tool for ultra-deepwater well control equipment used for offshore drilling operations is disclosed. Embodiments take into consideration all of the processes required for competent risk/reliability assessment for loss mitigation. In an illustrative embodiment, the system provides a simulation tool which evaluates equipment components and simulates the various failure modes for each component and the effect on the other components in the equipment being evaluated. An automated reporting tool quickly identifies components, failure modes for components, and troubleshooting information.

In some embodiments, a method for executing an emergency disconnect sequence in shallow water depth includes unlatching a lower marine riser package (LMRP) of a blowout preventer (BOP) from a lower stack of the BOP. The BOP defines a wellbore fluidically coupled to the subsea wellhead. A tubular is disposed within the wellbore. The method further includes shearing the tubular and sealing the wellbore. In response to an indication that a vessel operably coupled to the BOP has failed to keep station, an unlatch sequence and a shear and seal sequence are initiated, such that each sequence occurs at least partially simultaneously. The unlatch sequence includes disconnecting the LMRP from the lower stack, and the shear and seal sequence includes activating the lower stack to shear the tubular in less than about one second and seal the wellbore.

A blowout preventer for shearing structures positioned in a bore extending through the blowout preventer, the blowout preventer body having a bore and guideways, first and second rams movably positioned relative the guideways and movable toward the bore, a blade of the first ram having a flat side, a blunt leading contour, an upper inclined surface forming an angle of about 140 degrees with the flat side, and a lower declined surface forming an angle of about 80 degrees with the at least one upper inclined surface, a blade of the second ram having a flat side, a leading contour, and at least one lower declined surface.

An apparatus is disclosed as including a first material volume with at least a hardened portion and a second material volume that includes at least two layers. The first material volume is composed of at least a hardenable alloy of steel. The at least two layers is located adjacent to a first surface comprising the hardened portion of the first material volume. The at least two layers includes a first layer composed of at least a ductile low-carbon alloy of steel and a second layer composed of at least a cobalt-based hardfacing over the first layer. The apparatus is applicable in preparing shear ram blocks and shear ram blades to provide a hardened blade edge with an adjacent hardfacing surface.

The present disclosure relates to a ram system for a blowout preventer. The ram system includes a first ram having an interlocking arm, where the interlocking arm includes a first anti-deflection feature. The ram system includes a second ram having a second anti-deflection feature. The first ram and the second ram are configured to move toward one another along a longitudinal axis to reach an engaged configuration. The second ram is configured to receive the interlocking arm of the first ram to enable the first anti-deflection feature to engage with the second anti-deflection feature while the first ram and the second ram are in the engaged configuration to thereby enable the first and second anti-deflection features to block deflection of the interlocking arm relative to a lateral axis, an axial axis, or both.

An annular fracturing cleanout apparatus includes: a main section including an upper connection end, a lower connection end and a main bore extending through the main section from the upper connection end to the lower connection end; a lateral section connected in a wye configuration with the main section, the lateral section defining a lateral bore therein, the lateral bore opening at an upper end of the lateral section and converging at a lower end with the main bore; and a bore control mechanism for the bore in the lateral section. A wellbore stack configuration includes the annular fracturing cleanout apparatus coupled above a fracturing wellhead assembly and below a blow out preventer assembly.

A system for operating a blowout preventer (BOP) includes a front piston positioned at least partially in a front chamber. The front chamber includes a front volume on a front side of the front piston, and a back volume on a back side of the front piston. The system also includes a back piston connected to the front piston. The back piston is positioned at least partially in a back chamber. The back chamber includes a front volume on a front side of the back piston, and a back volume on a back side of the back piston. The system also includes a first valve configured to permit fluid flow into the front chamber during a free closing stroke of the BOP. The system also includes a second valve configured to permit fluid flow between the front and back volumes of the back chamber during the free closing stroke.

A blowout preventer (BOP) for controlling pressure within a wellbore includes an internal cavity and a front side including a door opening, the door opening providing access to the internal cavity. The BOP also includes a door assembly associated with the door opening. The door assembly includes a door, movable between a first position and a second position, the door blocking access to the internal cavity in the first position and enabling access to the internal cavity in the second position. The door assembly also includes a hinge coupled to the door to facilitate movement of the door between the first position and the second position. The door assembly further includes a coupling device associated with the door, the coupling device securing the door to the front side. The BOP also includes a back side including an outlet, the outlet being fluidly coupled to the internal cavity.

A multi-metallic pressure-controlling component and a hot isostatic pressure (HIP) manufacturing process and system are disclosed. An example multi-metallic component for use in the oil field services industry includes a first metal alloy that forms a first portion of the multi-metallic pressure-controlling component, and a second metal alloy that forms a second portion of the multi-metallic pressure-controlling component. A diffusion bond is disposed at an interface between the first metal alloy and the second metal alloy that joins the first metal alloy to the second metal alloy within the multi-metallic pressure-controlling component.

A blowout preventer (BOP) includes a main body that includes a bore extending through the main body. The BOP also includes a cavity intersecting the bore and a pair of opposing shear rams configured to shear a tubular located in the bore. The opposing shear rams are two duplicate shear rams.