Abstract: A wellhead includes a wellhead body and a locking end coupled to the wellhead body. The locking end includes an exterior surface with an exterior locking profile. The exterior locking profile includes an exterior groove formed between exterior stab and load flanks on the exterior surface. The locking end also includes an interior surface having an interior locking profile. The interior locking profile includes an interior groove formed between interior stab and load flanks on the interior surface. At least one of the exterior groove or the interior groove is a relief groove that undercuts at least one of the respective stab or load flank. The relief groove corresponds to a portion of the contour of an ellipse intersecting at least a portion of the respective stab or load flank, and an axis of the ellipse is at a tilted angle with respect to an axis of the wellhead.

Abstract: A technique facilitates completion and stimulation of a reservoir, e.g. a lower tertiary reservoir. Initially a wellbore is drilled into the tertiary reservoir. Following drilling, the wellbore is completed by deploying completion equipment constructed to facilitate stimulation of the tertiary reservoir. The completion equipment may be operated in conjunction with a stimulation system to stimulate the tertiary reservoir and thus to enhance retrieval of hydrocarbon fluids contained within the tertiary reservoir.

Abstract: A cylindrical drum with a fluid inlet is configured to be connected to a downhole end of a fluid conduit. The cylindrical drum has an outer surface along which is the fluid inlet. The cylindrical drum has a center and an inner surface. Fluid nozzles fluidically connect to an interior of the cylindrical drum and are positioned around the outer circumference of the cylindrical drum. The fluid nozzles are positioned to direct fluid away from the cylindrical drum. A rotatable collar is positioned in the center of the cylindrical drum. The rotatable collar has an outer surface parallel to the inner surface of the cylindrical drum. Sleeve plates are positioned between the inner surface of the cylindrical drum and the outer surface of the rotatable collar. Each of the sleeve plates defines a hole with a diameter smaller than a diameter of a corresponding dropped ball.

Abstract: In a dual injection method for hydrocarbon reservoir management, a production well is formed from a surface of a subterranean hydrocarbon reservoir to a hydrocarbon-bearing zone in the reservoir. A first injection well and a second injection well are formed from the surface to a first depth and a second depth, respectively, in a water-bearing zone below the hydrocarbon-bearing zone, the second depth shallower than the first depth. A first injectant of a first type and a second injectant of a second type injected into the water-bearing zone through the first injection well and the second injection well, respectively. The second injectant is injected to sweep hydrocarbons in the hydrocarbon-bearing zone toward the production well. The first injectant is injected to sweep the second injectant toward the hydrocarbon-bearing zone. At least a portion of the hydrocarbons in the hydrocarbon-bearing zone are produced through the production well.

Abstract: A valve apparatus (400) for a flow system in a subsea oil and gas production installation and a method of use. The valve apparatus comprises an inlet for production flow from the subsea oil and gas production installation, an outlet for production flow, and a flow control valve (420) disposed between the inlet and the outlet. A first flow line (361) in communication with a sampling circuit is disposed between the inlet and the flow control valve, and a second flow line (362) in communication with a sampling circuit is disposed between the outlet and the flow control valve. The flow control valve is operable to be partially closed to create a pressure differential between the first and second flow lines, and thereby drive a production fluid into the sampling circuit.

Abstract: A guide for a top drive unit includes a lower track member connected to a lower mast section and an upper track member connected to an upper mast section and telescoped with the lower track section. A slider is slidably positioned about the upper track member so the slider is movable along the upper track member. The slider has a lateral cross-sectional profile substantially the same size and shape as a lateral cross-sectional profile of the lower track member. The skate is slidably positioned about the lower track member to be movable along the lower track member and onto the slider. The skate travels along the upper track member via the slider. The skate is connectable to a top drive unit so the top drive unit is movable along the lower track member and the upper track member.

Abstract: A remotely operated subsea well completion system, which comprises local storage (28, 36) of hydraulic energy and feedthroughs in a BOP (11) or a marine riser (9), has the object of installing or pulling a production tubing and its tubing hanger without using an umbilical within a marine riser. The system consists of an internal control module (25), which comprises hydraulic accumulators (28), a liquid divider (31), control valves (30, 34), an electric control module (27), as well as one or more transmitters/receivers (19) for communication to an external control unit (21, 26). The communication may be through acoustic feedthroughs in existing choke, kill or booster ports.

Abstract: A flow restrictor for installation in a connection having a terminus opening into an underground vault. The flow restrictor includes an annular restriction device and a concentration member. The annular restriction device is configured to be installed in the annulus near the terminus opening and to restrict a flow of one or more gases through the annulus of the connection. The concentration member is configured to concentrate the flow and includes a through-channel configured to allow the concentrated flow to flow between the underground vault and the annulus.

Abstract: A system for use with a connection comprising a terminus opening into an underground vault. The system includes a perturbation detector and a system controller. The perturbation detector is configured to detect values of each of one or more properties and transmit a signal encoding the values to the system controller. The system controller is configured to receive the signal, use at least one of the values to determine whether a fire is occurring or has occurred, and alert a user when the system controller determines that the fire is occurring or has occurred.

Abstract: A threaded joint is constructed of a pin and a box. The pin includes, in order from an end of the pin toward the tubular body: a first male threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second male threaded portion. The box includes a first female threaded portion, a first sealing surface, a shoulder surface, a second sealing surface, and a second female threaded portion. A length from a boundary of the first sealing surfaces to a position of the shoulder surfaces and a length from a boundary of the second sealing surfaces to a position are each at least 15 mm, and the total length which is a sum of the length and the length is at least 50 mm. Thus, the threaded joint is capable of providing excellent sealing performance.

Abstract: The present invention relates to a hydraulically powered percussion mechanism (12), comprising a piston (6) to impact a percussion bit (8). The percussion mechanism also includes a first accumulator assembly (3a) for hydraulic fluid. The first accumulator assembly comprises a plurality of first accumulator elements (27). In a first aspect, the plurality of first accumulator elements are arranged in a common housing (14). In a second aspect, each of the first accumulator elements is arranged at the same proximity to the piston. In a third aspect, each of the first accumulator elements comprises an accumulator membrane (32) or piston, and wherein the primary direction of movement of the membrane or piston in contact with the hydraulic fluid is substantially parallel to a longitudinal axis of the mechanism.

Abstract: A hydrocarbon extraction system that includes an erosion control system. The erosion control system includes a housing defining a first inlet, a second inlet, and an outlet. The housing receives and directs a flow of a particulate laden fluid between the first inlet and the outlet. A conduit rests within the housing. The conduit changes a direction of the particulate laden fluid and reduces erosion of the housing. The conduit is inserted into the housing through the second inlet. The conduit defines a plurality of apertures between an exterior surface and an interior surface of the conduit. The apertures direct the fluid into a conduit cavity. The conduit guides the fluid entering the conduit cavity to the outlet. The erosion control system excludes a plug and/or a sleeve around or in the conduit.

Abstract: Disclosed is a method for use in restricting or sealing a bore. A tubular is expanded in the bore to cause the tubular to split and be extended towards a wall of the bore. A straddle is located within the tubular so as to extend across the region of the tubular which has been split, and expanded to seal the split in the tubular. Also disclosed is apparatus comprising one or more expansion tools and a straddle, for use in sealing or restricting a bore. The apparatus may be used in conjunction with a tubular as disclosed herein, having one or more weak zones adapted to preferentially split under the action of an expansion tool.

Abstract: Systems and methods for continuous mud circulation during a drilling operation. The method includes delivering a first flow of drilling mud from a mud supply, through a drill string, into a wellbore, and through a blowout preventer. The drill string is received through the blowout preventer. The method also includes delivering a second flow of drilling mud into the blowout preventer. The second flow is not delivered through the drill string. The method further includes stopping the first flow, and removing or adding a tubular to or from the drill string when the first flow is stopped and while continuing to deliver the second flow.

Abstract: A wellsite system includes a drilling rig, an elevator, and a support system that includes a housing coupled to the drilling rig, a bracket member pivotably coupled to the housing, an actuatable arm coupled to the bracket member and configured to be moveable along an axis of the bracket member, and a servicing system coupled to the actuatable arm, wherein the servicing system is configured to threadlessly engage a tubular. A wellsite servicing system includes a first flange, a second flange configured to engage a flange of a tubular, and a spindle that is pivotable between the first and second flanges such that a central axis of the second flange remains in axial alignment with a central axis of the tubular when the central axis of the tubular is axially misaligned with a central axis of the first flange.

Abstract: A modified API Buttress threaded casing connection for use in oil and gas wells incorporates an integral Reduced Drag (RD) feature that comprises a tapered or rounded leading edge. In certain embodiments, both ends of the coupling incorporate the integral Reduced Drag (RD) feature that comprises a tapered or rounded leading edge to facilitate removal of the casing from a wellbore.

Abstract: A stripper packer coupling assembly can include a packer operable to receive a tubular therethrough and form a seal about the tubular. The packer can comprise a plurality of coupling protrusions, each having a coupling head defining a first capture interface. Additionally, the stripper packer coupling assembly can include a capture mechanism. The capture mechanism can comprise a guide member having a plurality of guide openings, each operable to receive one of the plurality of coupling heads therein. The capture mechanism can also comprise a plurality of capture members, each defining a second capture interface. Capture members can be operably coupled to one another such that they are simultaneously movable relative to the guide member and the coupling protrusions between a capture position and a release position. In the release position, the capture members can facilitate passage of the coupling heads through the guide openings.

Abstract: A fracturing manifold module of a fracturing manifold system for controlling the flow of fracturing fluid from a shared manifold trunk line to a plurality of wellheads each adapted for fracturing a well. The fracturing manifold module includes a transport skid adapted to be ground supported and a flow control unit supported on the transport skid and including an inlet adapted for connection along an axis of the shared manifold trunk line, an outlet adapted for connection to one of the plurality of wellheads via one or more fluid conduits, and one or more flow control valves between the inlet and the outlet. The transport skid and the flow control unit are connected together to provide for rotation of the flow control unit relative to the transport skid in a generally horizontal x-y plane relative to the ground, said rotation being about a z-axis perpendicular to the x-y plane to provide for adjustable connection to the fracturing manifold system at one or both of the inlet and the outlet.

Abstract: A hydraulic fracturing system that includes a fixed-speed gas turbine assembly having a gas generator and power turbine, both mounted to a semi-trailer. The system further includes a hydraulic pump mounted to the semi-trailer and connected to an output shaft of the power turbine and a hydraulically-driven fracturing fluid pump mounted to the semi-trailer and being in fluid communication with the hydraulic pump, the hydraulic pump supplying fluid pressure to the hydraulically-driven fracturing fluid pump. The system is configured such that the hydraulically-driven fracturing fluid pump receives fracturing fluid containing chemicals and proppants and pressurizes the fracturing fluid to a pressure sufficient for injection into a wellbore to support a hydraulic fracturing operation.

Abstract: A vertical multi-bore jumper. The jumper is outfitted with interfaces that include rotatable hubs accommodating perimeter bore terminations that may be rotated about a central production bore. In this manner, the multiple bores may be flexibly aligned with corresponding couplers at equipment located on the seabed. As a result, undue torque is not placed on the jumper in attempting to align multiple bores at the interfaces which may be frequently misaligned at the outset of such installations.