A shear ram assembly for use in a BOP stack. The shear ram assembly includes a ram block disposed within the shear ram housing and having a forward end facing the bore, the ram block movable between an open position, in which the ram block is retracted away from the bore, and a closed position, in which the ram block is extended toward the bore. The blade has a forward surface, a rear surface, a lower shearing edge, and an upper edge, the blade attached to the forward face of the ram block by fasteners extending at an angle relative to an upper surface of the ram block through a portion of the ram block and into the rear surface of the blade, the rear surface of the blade angled so that it is perpendicular to the longitudinal axis of the fasteners.

An assembly of a drill string element adapted to be held by the drill pipe rams of a blowout preventer (BOP) to enable the drill string to be disconnected at the BOP and a detachable driving element is described. The drill string element comprises a housing portion defining a longitudinal bore along a longitudinal axis X-X of the housing portion. At least one recess is arranged in the longitudinal bore, said at least one said recess (8) being arranged to engage at least one lug of a detachable driving element arranged to be disposed in the longitudinal bore to rotationally lock the housing portion and detachable driving element together.

Blowout preventers having bodies without flanged necks are provided. In one embodiment, a blowout preventer stack includes first and second blowout preventers having independent and separable main bodies, each including a bore and a ram cavity transverse to the bore. The lower end of the main body of the first blowout preventer is fastened directly to an upper end of the main body of the second blowout preventer without a flanged neck extending the bore between the ram cavities of the first and second blowout preventers. In some instances, the main bodies of the first and second blowout preventers include external connection flanges that extend laterally from ram cavity body portions of the main bodies so as to enable connection of the two main bodies along the sides of the main bodies away from their bores. Additional systems, devices, and methods are also disclosed.

The present invention relates to a boltless bonnet assembly for use in a blowout preventer (BOP). In some embodiments, the boltless bonnet assembly includes a bonnet having a forward end facing a ram body of the BOP stack, and a bonnet latch disposed within the bonnet, the bonnet latch attached to the forward end of the bonnet. The boltless bonnet assembly further includes a bonnet positioning mechanism in communication with the bonnet latch to move the bonnet latch into and out of engagement with the ram body.

In one embodiment, an annular isolation device for a riser includes a tubular body connectable to the riser. A closure member is rotatable between a closed position isolating fluid communication in the tubular body and an open position permitting fluid communication through the tubular body. The annular isolation device further includes an actuator disposed outside the tubular body and operable to rotate the closure member between the open position and the closed position.

A relief well injection spool for use in killing a well has a body with a pair of inlets opening to a bore on an interior of the body, a ram body cooperative with the bore of the body so as to selectively open and close the bore, an upper connector affixed to the body and adapted to connect the body to a lower end of a blowout preventer, and a wellhead connector affixed to a lower end of the body. Each of the pair of inlets has a valve cooperative therewith. The upper connector opens to the bore of the body. The wellhead connector is adapted to connect to a relief well wellhead. The wellhead connector also opens to the bore of the body. A floating vessel can be provided so as to deliver a kill fluid into at least one of the pair of inlets.

Blowout preventers having bodies with internal choke and kill line pass-through conduits are provided. In one embodiment, a blowout preventer body (42) includes a drill-through bore (44) extending through the blowout preventer body and a ram cavity (58) transverse to the drill-through bore. The blowout preventer body can also include choke and kill line conduits (136, 138) extending through the blowout preventer body, as well as choke and kill line access branch conduits (148, 150) extending between the choke and kill line conduits and the drill-through bore. Additional systems, devices, and methods are also disclosed.

An underwater robotic system includes a frame for deployment in a body of water and having a control panel with multiple controls. A first actuator on the frame selectively actuates a control from a front side of the panel. A second actuator on the frame selectively actuates a control from a back side of the panel. One or more controls on the panel is configured to regulate distribution of a fluid. The frame is configured to couple to a blowout preventer. A method for robotic fluid distribution in an underwater environment.

A control system for controlling disconnection of riser system that extends between a vessel and a subsea location that comprises a wellbore, the riser system configured to receive a string in use, the control system being configured to disconnect the riser system according to a sequence of operations, the sequence of operations comprising disconnecting the riser system prior to or simultaneous with cutting the string and sealing the well bore.

This disclosure relates generally to blowout preventers, or “BOPs,” for use in a well. The BOPs according to the present disclosure can include a substrate assembly, which can include a substrate body having a base and a protrusion. The substrate assembly can also include pressure components. The substrate assembly can result in overall improved BOP performance. Additionally, whereas prior art BOP ram bodies are typically made of rubber, BOP ram bodies according to the present disclosure can also include graphene. This results in a harder BOP ram that is more resistant to wear and tear. Normally the additional hardness would result in difficulty forming a seal in the well, but this problem is alleviated by the substrate assembly design.