Abstract: A monitoring system includes a subsea laboratory configured to be positioned and operated below a sea surface. The subsea laboratory includes a housing, a fluid chamber within the housing and configured to receive a fluid from subsea drilling or production equipment, and a sensor within the housing and configured to generate a signal indicative of a characteristic of the fluid. The monitoring system also includes a controller having a processor configured to receive and to process the signal to determine the characteristic of the fluid, to determine an appropriate output based on the characteristic of the fluid, and to provide a control signal that causes an indication of the output via a user interface of a remote base station positioned above the sea surface.

Abstract: Disclosed here are systems and methods for modular blowout preventer (BOP) control. A modular BOP control unit system of one embodiment includes a group of modular control units mounted on a skid. The modular control units can include a main control unit module for an annular BOP, a diverter valve module for a diverter, and a BOP valve module for one or more ram BOPs. In some instances, the modular control units are received in pockets of the skid. Additional systems, devices, and methods are also disclosed.

Abstract: An annular blowout preventer includes a housing, an annular packer positioned within the housing, and an annular piston assembly positioned within the housing. An annular contacting surface of the annular piston is configured to contact the annular packer while the annular blowout preventer is in the open position. The annular blowout preventer also includes a plurality of inserts extending axially through the annular packer and arranged circumferentially within the annular packer. The annular piston is configured to drive the annular packer in an axial direction within the housing, thereby compressing the annular packer, causing the plurality of inserts to rotate radially inwardly, and moving the annular blowout preventer from the open position to a closed position.

Abstract: A load-balanced, high-capacity mud pump is provided. In some embodiments, load balancing is achieved by spacing hubs along the crankshaft of the mud pump with the bull gears disposed opposite one another, on outer ends of the crankshaft adjacent to the housing. In such an embodiment, the hubs are disposed along the crankshaft between the bull gears. A pinion shaft (or separate pair of shafts) can be provided, mechanically supported in the mud pump by roller bearings or lubricated pads. Additional systems, devices, and methods are also disclosed.

Abstract: A flow meter system is disclosed that includes a first flow sensor and first and second fluid flow conduits extending from the first flow sensor. The second fluid flow conduit may be disposed inside the first fluid flow conduit thereby forming a fluid annulus between the first and second fluid flow conduits. The first fluid flow conduit may be metal to resist a fluid pressure differential and the second fluid flow conduit may be non-metal to balance a fluid pressure across the second fluid flow conduit and attenuate noise therein. The fluid annulus may be configured to receive a fluid to balance the fluid pressure across the second fluid flow conduit.

Abstract: A blow out preventer (“BOP”) includes a vertical bore extending through the body, a ram cavity intersecting the bore, and a port located below the ram cavity. A sensor assembly is locatable in the port and is configured to monitor the position of at least one opposing ram contained in the BOP. At least one of the rams includes a detection feature on a lower surface of the ram which is distinguishable from the rest of the ram body, other features of the BOP, and any debris in the bore of the BOP. The detection feature is detectable by the sensor assembly. The detection feature may include a visual indicator.

Abstract: Embodiments of the present disclosure are directed to a system including a flange configured to couple to a component of a mineral extraction system, where the flange includes a base, an exterior annular tapered portion extending from the base, and an annular wall extending from the exterior annular tapered portion, wherein the annular wall at least partially defines a central exterior cavity and at least partially defines an interior annular cavity. The system also includes an inductive power and data transmission system mounted within the flange, wherein the inductive power and data transmission system comprises a first component and a second component, wherein the first and second components are separated by the annular wall.

Abstract: A valve assembly is provided, the valve assembly comprising a valve housing; an inlet for fluid entering the valve housing; an outlet for fluid leaving the valve housing; a flow control assembly disposed within the valve housing between the inlet and the outlet, whereby fluid entering the valve housing is caused to flow through the flow control assembly, the flow control assembly comprising a cage having apertures therethrough to provide passage for fluid passing from the inlet to the outlet; a closure assembly having a first closure member disposed within the cage and moveable with respect to the cage between a first closed position, in which the first closure member closes the innermost end of all of the apertures in the cage, and a second open position, in which the innermost end of all the apertures in the cage are open; and a second closure member disposed outside the cage and moveable with respect to the cage between a first closed position, in which the second closure member closes the outermost end of

Abstract: A method of wireless power transfer includes providing a primary rail voltage to a primary coil via a primary transistor network, driving the primary transistor network with a primary PWM signal, inducing a secondary current on a secondary coil, providing a secondary rail voltage to a load via a secondary transistor network, generating a voltage signal from the secondary current via a current sense amplifier, phase-locking the voltage signal to the secondary current, adjusting a phase shift and amplitude of the voltage signal based on the impedance of the load, thereby generating a driving voltage, converting the driving voltage to a secondary PWM signal, and driving the secondary transistor network with the PWM signal.

Abstract: A system includes a housing of a wellhead, a hanger configured to be positioned within the housing of the wellhead, and a hanger retention system. The hanger retention system includes a key-slot interface having at least one retention segment configured to move between a collapsed position in which the at least one retention segment does not block movement of the hanger relative to the housing of the wellhead and an engaged position in which the at least one retention segment engages at least one corresponding slot to block movement of the hanger relative to the housing of the wellhead. The at least one retention segment includes a wavy cross-sectional shape at least while the at least one retention segment is in the engaged position that enables the at least one retention segment to move between the collapsed position and the engaged position.

Abstract: A system includes a safety system having one or more valves configured to block a flow of fluid from a source to a destination, a non-invasive pressure measurement system having a plurality of non-invasive pressure sensors configured to monitor a pressure of the fluid without directly contacting the fluid, and a controller configured to receive feedback from the non-invasive pressure measurement system and to adjust a position of the one or more valves of the safety system based on the feedback.

Abstract: The present disclosure relates generally to data communication in subsea oil and gas drilling and production operations. In particular, data communication from sensors located on a piece of subsea oil and gas drilling and/or production equipment to a remote location, such as to a demodulation system, is disclosed. The data communication system can include sensors for measuring various characteristics of the subsea equipment, for coding the measured data into a signal, for transmitting the signal, and for ultimately decoding the signal. The signal is transmitted along the structures which provide the containment for existing hydraulic fluid lines associated with the subsea equipment by a variety of methods, such as by pulse position modulation and/or reverse time pulse position modulation. The communication system can further include a local power generator assembly to power associated sensors and transmitters.

Abstract: A self-aligning mud pump apparatus is provided. In one embodiment, the mud pump includes a rotatable crankshaft, a crosshead, a crosshead guide, and a hub disposed in a housing. The hub is disposed on the crankshaft and is operable to convert rotating motion of the crankshaft to reciprocating motion of the crosshead within the crosshead guide. The hub is coupled to the crosshead via a connecting rod, which is connected the crosshead such that the connecting rod has five degrees of freedom with respect to the crosshead guide. The mud pump may also or instead include a piston coupled to the crosshead with five degrees of freedom between the piston and the crosshead. Additional systems, devices, and methods are also disclosed.

Abstract: A fracturing system is provided. In one embodiment, the fracturing system includes a fracturing manifold for routing fracturing fluid to multiple wells. The fracturing manifold can be coupled via fluid conduits to fracturing trees installed at the wells. In some cases, each fracturing tree that is coupled to the fracturing manifold is coupled by at least one rigid fluid conduit. The fracturing manifold can include a trunk line that provides fracturing fluid to multiple outlet branches, which can include valves for controlling flow of fracturing fluid to wells downstream of the valves. Additional systems, devices, and methods are also disclosed.

Abstract: A system including a connector system configured to couple a first tubular to a second tubular comprising a sleeve configured to couple to the first tubular, wherein an inner diameter of the sleeve comprises a coupling feature, a lock ring configured to couple to an exterior surface of the second tubular and radially engage with the coupling feature of the sleeve, a piston ring configured to energize the lock ring into engagement with the sleeve, a first pressure ring configured to couple to the second tubular, wherein the first pressure ring is axially beneath the piston ring, and a second pressure ring disposed about the piston ring and configured to couple to the second tubular.

Abstract: A wellhead hanger assembly is provided. In one embodiment, a system includes a wellhead hanger, a running tool coupled to the wellhead hanger, and a torque sleeve positioned to transmit torque from the running tool to the wellhead hanger. The running tool can be in castellated engagement with the torque sleeve via a first set of castellations and mating slots, and the wellhead hanger can be in castellated engagement with the torque sleeve via a second set of castellations and mating slots. Additional systems, devices, and methods are also disclosed.

Abstract: A ram blowout preventer (“BOP”) may be used for sealing about an object positioned in a vertical bore extending through the BOP. The ram BOP includes a body comprising a vertical bore extending through the body and a ram cavity intersecting the bore, a ram assembly movable laterally into and out of the BOP vertical bore and comprising a ram body, and an opposing ram assembly movable laterally into and out of the BOP vertical bore and comprising a ram body and a seal body coupled to the ram body, wherein the seal body comprises a seal configured to seal the entirety of the BOP vertical bore. The seal can be located on the upper and/or lower portion of the seal body to provide for bi-directional sealing across the BOP.

Abstract: A system includes a hanger running tool that has a tool body, a first sleeve coupled to an external surface of the tool body, a second sleeve coupled to the first sleeve, where the second sleeve is configured to engage a push ring of a hanger to drive a lock ring of the hanger into a recess of a casing spool, and a pin disposed in the tool body and the first sleeve, where the pin is configured to enable rotation of the tool body independent of the first sleeve in a first circumferential direction, and where the pin is configured to block rotation of the tool body independent of the first sleeve in a second circumferential direction, opposite the first circumferential direction.

Abstract: A blowout preventer (“BOP”) for sealing against an object includes a housing comprising a bore extending through the housing with the object being extendable through the bore. The BOP further includes a packer assembly movably positioned within the housing and configured to form a seal within the housing. The packer assembly includes a body comprising an elastomeric material and an insert at least partially positioned within the body. The insert comprises a harder material section and a softer material section with respect to the harder material section and configured to deform against the object.

Abstract: An embodiment of a tubing or casing hanger seal assembly includes a first carrier ring, a first energizing ring coupled to the first carrier ring and configured to set a first seal of the seal assembly in response to the application of a first load to the seal assembly, and a first lock ring configured to secure the first seal to the tubing or casing hanger in response to the application of the first load to the seal assembly, wherein the first carrier ring and the first lock ring include corresponding angled engagement profiles for providing a radial force against the first lock ring relative a central axis of the seal assembly in response to the application of the first load to the seal assembly.