A method of reducing hydraulic shock in a BOP system including a pressure regulator having an input port and an output port, and a regulator piston that moves between an open and a closed position based on a change in hydraulic pressure applied to the regulator piston via a pilot port. The method includes initiating a function, and monitoring the state of the function as it is carried out to predict when the function nears the end of its cycle. The method also includes, when the function reaches a predetermined state, adjusting the hydraulic pressure on the regulator piston via the pilot port to gradually move the regulator piston between the open to the closed position to reduce fluid flow through the fluid path in a controlled manner to reduce hydraulic shock.

A technique facilitates communication in a subsea well application. The technique involves deployment of a blowout preventer subsea control and telemetry system to a subsea location proximate a wellbore. The blowout preventer subsea control and telemetry system is coupled to both a blowout preventer system and a wireless telemetry system. The wireless telemetry system has a plurality of repeaters deployed along the wellbore. The blowout preventer subsea control and telemetry system is used both to collect data from the wireless telemetry system and to control operation of the blowout preventer system. For example, the blowout preventer subsea control and telemetry system may receive control signals from a surface system and also relay data to the surface system through a common communication line.

This disclosure provides a hybrid well capping stack system that uses a lower ram blow-out preventer (BOP) coupled to a gate valve-based capping stack that has first and second flowlines where the first flowline has a gate valve and the second flowline has a gate valve. At least one of the first and second flowlines is located on the frame to divert a flow of fluid laterally from a central flow axis of a wellbore.

This disclosure includes systems and methods for actuating hydraulically-actuated devices.

A blowout preventer (BOP) stack module includes a chassis core having a module frame, wherein the chassis core supports one or more submodules each configured to perform a function of a BOP stack, an underwater vehicle coupling hardware coupled to the chassis core, wherein the underwater vehicle coupling hardware couples with an underwater vehicle configured to transport and selectively couple and uncouple the BOP stack module relative to the BOP stack, and a mechanical connector coupled to the chassis core, wherein the mechanical connector couples to a stack frame of the BOP stack, and at least one port coupled to the chassis core, wherein the at least one port is a fluid port, a hydraulic port, a pneumatic port, an electrical port, or a combination thereof, wherein the at least one port couples with a corresponding port of the BOP stack.

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.

A subsea shutoff device, in particular for use in water depths of more than 30 m for operating a valve with a gate with a waterproof, oil filled housing, a crank mechanism arranged in the housing, and a rotary actuator, wherein the rotary actuator is adapted to operate a gate of a valve via the crank mechanism.

A blowout preventer (BOP) health monitoring system includes a controller having a tangible, machine readable-medium storing one or more instructions executable by a processor. The one or more instructions are configured to receive feedback from a sensor, where the feedback is indicative of a pressure within a BOP stack over time, determine a position of a plurality of components of the BOP stack, determine a start point and an end point of a pressure test based on the feedback, determine a decay and a hold duration of the pressure test based on the feedback, the start point, and the end point, determine a health index of the BOP stack based on the decay and the hold duration, and provide an output indicative of a condition of the BOP stack based on the health index.

In one aspect there is provided a ram block inner seal assembly comprising a core member having a top face, a bottom face, a front face, a rear face, and two side faces. A connector portion connects the top and bottom faces. A peripheral member surrounds the front, rear and side faces. The core member further comprises a peripheral groove on at least the front and side faces, the peripheral groove having a cross-sectional profile. The peripheral member further comprises an energizing section that has a cross-sectional profile which substantially matches the cross-sectional profile of the peripheral groove.

A fluid management system for controlling fluid flow at a wellbore includes a closing element formed complementary to a drill pipe disposed within the wellbore and an activation system. The activation system is configured to move the closing element into an activated position against the drill pipe to close the wellbore around the drill pipe for preventing fluid from flowing out of the wellbore. The activation system includes an activation shaft coupled to the closing element and a rotatable drive shaft configured to cause translation of the activation shaft to push the closing element into the activated position against the drill pipe.