A pressure control system includes a housing having a bore and a first pair of opposed rams positioned within the housing. The first pair of opposed rams is configured to move between a retracted position and an extended position relative to the bore. The pressure control system further includes a rotating control device (RCD) seal assembly, which includes a frame that is configured to couple to the first pair of opposed rams while the first pair of opposed rams are in the extended position relative to the bore, an annular seal element coupled to the frame, and a bearing assembly positioned between the annular seal element and the frame. The annular seal element is configured to seal about a tubular within the bore, and the bearing assembly is configured to enable the annular seal element to rotate relative to the frame and the first pair of opposed rams.

A closing unit system for a blowout preventer (BOP) stack includes a first fluid reservoir, a first power source, a first pump system fluidly coupled to the first fluid reservoir and electrically coupled to the first power source, and a valve manifold fluidly coupled to the first pump system via a closing unit hose assembly and configured to couple to the BOP stack. The closing unit system also includes one or more processors that are configured to receive an input indicative of an instruction to adjust an actuator associated with the BOP stack, and instruct the first power source to provide power to the first pump system to cause the first pump system to pump a fluid from the first fluid reservoir to the valve manifold in response to the input.

A multi-intervention blowout preventer includes a body having a bore therethrough. A first pair of ram blocks may be coupled to the body and include a ram, a catcher, and a blade operationally connected to the bore via a first pair of openings in the body. The ram, the catcher, and the blade may cut a flexible line extending through the bore while holding the flexible line. A second pair of ram blocks may be coupled to the body and include a second pair of rams operationally connected to the bore via a second pair of openings in the body to seal around a tubular. A third pair of ram blocks may be coupled to the body and include a third pair of rams operationally connected to the bore via a third pair of openings in the body to seal the bore.

A BOP booster assembly is provided for use with BOPs that utilize hydraulic actuators mounted in BOP end caps to open the BOP for replacement of the shearing members. The booster assembly has three main components comprising a booster housing, piston, and end plate. An extension in the booster housing is sufficiently long to position the booster hydraulic cylinder axially outside of the ends of the bonnet end caps of the BOP with respect to the wellbore. The booster piston is equal in diameter or larger than the operating piston of the BOP. The operating pistons and booster pistons move simultaneously, in sync, and the same distance for closing and cutting. In one embodiment, an internal hydraulic line is provided in the booster cylinder wall.

A blowout preventer system including a lower blowout preventer stack comprising a number of hydraulic components, and a lower marine riser package comprising a first control pod and a second control pod adapted to provide, during use, redundant control of hydraulic components of the lower blowout preventer stack where the first and the second control pods are adapted to being connected, during use, to a surface control system and to be controlled, during use, by the surface control system. The blowout preventer system further including at least one additional control pod connected to at least one additional surface control system and to be controlled, during use, by the additional surface control system.

A blowout preventer system includes a lower blowout preventer (BOP) stack including a number of hydraulic components, and a lower marine riser package (LMRP) including a first control pod and a second control pod adapted to provide, during use, redundant control of hydraulic components of the lower blowout preventer stack where the first and the second control pods are adapted to being connected, during use, to a surface control system and to be controlled, during use, by the surface control system, wherein the blowout preventer system further includes at least one additional control pod connected to at least one additional surface control system and to be controlled, during use, by the additional surface control system. In this way, an improved blowout preventer system is provided.

A downhole assembly is disclosed. The downhole assembly includes a tube disposed in a wellbore, and a shroud coupled to and disposed around the circumference of the tube to form an annulus between an inner surface of the shroud and an outer surface of the tube. The downhole assembly further includes a flow control device disposed in the annulus, and a degradable plug disposed in the annulus and positioned to prevent fluid flow between the annulus and the tube.

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.

Safe dynamic handover between MPD and well control operations provides the ability to automate MPD, well control, and transitions therebetween while maintaining the wellbore in a dynamic fluid state at all times. In the event a kick is taken, a safe dynamic handover from MPD to well control operations is made, unknown formation fluids within the wellbore are circulated out of the wellbore, and a safe dynamic handover from well control operations to MPD is made while maintaining the wellbore in dynamic fluid state, without ever going static with respect to fluids within the wellbore. Because the wellbore remains dynamic, the formation of gels is prevented, thereby preventing pressure spikes during the start-up of the mud pumps and improving pressure transmission throughout the well system. Pressure may be more precisely managed during all phases of MPD, well control, and transitions therebetween.

A tool for severing or assisting in the severing of a conduit includes a housing defining a void arranged, in use, to at least partially encircle a conduit and an at least one void access, the void access having a void access inlet in fluid communication with the housing and a void access outlet being in fluid communication with the housing void. At least one propellant source is located within the housing. An ignition mechanism is provided for igniting the propellant source and at least one modifying material. Upon ignition, the propellant source deflagrates, creating at least one stream of combustion products, the stream of combustion products flowing out of the tool through the void access into the void, the void access channelling the stream of combustion products towards the conduit, the stream of combustion products combining with the modifying material to sever or assist in severing the conduit.