Abstract:
A subsea electronics module (SEM) is disclosed. The SEM includes a first axis and a second axis, the first axis being longer than the second axis. Electronic modules are mounted on at least one movable platform which is aligned to move in a direction of the first axis of the SEM. External electrical outlets are mounted on a body and along the first axis of the SEM. The external electrical outlets provide electronic coupling between the electronic modules and components of a lower marine riser package (LMRP).
Abstract:
An apparatus is disclosed as including a first material volume with at least a hardened portion and a second material volume that includes at least two layers. The first material volume is composed of at least a hardenable alloy of steel. The at least two layers is located adjacent to a first surface comprising the hardened portion of the first material volume. The at least two layers includes a first layer composed of at least a ductile low-carbon alloy of steel and a second layer composed of at least a cobalt-based hardfacing over the first layer. The apparatus is applicable in preparing shear ram blocks and shear ram blades to provide a hardened blade edge with an adjacent hardfacing surface.
Abstract:
Systems, methods, and computer readable media for handling overcurrent and undercurrent conditions in subsea control subsystem components include determining, by a current sensor operatively coupled to a solenoid valve 64, that an input current to a solenoid 66 is greater or lower than a predetermined threshold value, de-energizing, by a processor operatively coupled to the current sensor, the solenoid for a first period of time, re-energizing the solenoid at least three times after the first period of time, determining, by the current sensor, that during each of the at least three times the input current to the solenoid is greater or lower than the predetermined threshold value, and de-energizing the solenoid and transmitting a control signal to a control unit.
Abstract:
A method for analyzing material wear in a hydrocarbon production environment is disclosed. The method is characterized by the steps of preparing a sample of material to be disposed proximate the hydrocarbon production environment; selecting a placement location for the sample of material, wherein the placement location is in fluid communication with a fluid flow for which the impact of the fluid flow on the sample of material is to be tested; disposing the sample of material in the placement location for a pre-determined amount of time; allowing the sample of material to be exposed to the fluid flow; retrieving the sample of material from the placement location after the pre-determined amount of time has passed; and analyzing the sample of material for wear caused by the hydrocarbon production environment.
Abstract:
A power and communications hub (PCH) (204, 206) for oil and gas operations is disclosed. The PCH includes a port operable to provide electrical power to a device for use in oil and gas operations; a port operable to provide electrical communications for use in oil and gas operations; a multiplexer (MUX) interface (214, 216) for connection to a MUX cable; a PCH connection interface for connection to at least one additional PCH (210, 212); and a PCH body. The PCH body is operable to be disposed proximate a blowout preventer (BOP) stack, and the PCH body is physically disposed apart from but in electrical communication with at least one control pod on the BOP stack.
Abstract:
A control system for a subsea blowout preventer (BOP, 12) positioned in a lower stack (14), the lower stack releasably engaged with a lower marine riser package (LMRP, 18). The control system includes a surface logic solver (38) positioned at or adjacent the surface of the sea that generates commands for operating the subsea BOP, a first subsea logic solver (40) attached to the LMRP and in communication with the surface logic solver so that the first subsea logic solver receives the commands from the surface logic solver, and a second subsea logic solver (44) attached to a hydraulic control unit (34) in the lower stack. The second subsea logic solver is in hydraulic communication with the subsea BOP, and the first subsea logic solver so that the second subsea logic solver receives the commands from the first subsea logic solver and implements the commands by activating the hydraulic control unit to operate the BOP.
Abstract:
A method and system for lifting drilling mud from subsea to a drilling vessel (22), which uses a pump (38) having a body (40) with a chamber (44, 46), and a bladder (42) in the chamber. The bladder attaches to the body and defines water (46) and mud (44) sides in the chamber. A mud inlet valve (66) allows mud into the mud side of the chamber; which moves the bladder into the water side and urges water in the water side from the chamber and through a water exit valve (98). Pressurized water enters the chamber through a water inlet valve (96), which in turn pushes the bladder and mud from the chamber through a mud exit valve (74). The bladder separates the mud and water as it reciprocates in the chamber. The travel of the bladder in the chamber is controlled to prevent damage from contact with the chamber.
Abstract:
A method for early kick detection in a drilling system with a drilling fluid loop, comprising: collecting flow-in rate and flow-out rate of a drilling fluid; calibrating the flow-out rate to obtain a calibrated flow-out rate of the drilling fluid; determining a flow rate difference between the flow-in rate and the calibrated flow-out rate of the drilling fluid; and identifying the kicks based on the flow rate difference. An apparatus (1) for early kick detection in a drilling system with a drilling fluid loop is also disclosed.
Abstract:
A shear ram system (200, 300) includes an upper block (302) positioned to transition from a first location outside a bore (214) to a second location within the bore (214), the upper block (302) including a blade control arm (306) having a first contact surface (318). The shear ram system includes a lower block (304) positioned to transition from the first location outside the bore (214) to the second location within the bore (214), the lower block (304) including a second contact surface (320) proximate the first contact surface (318). The shear ram system (200, 300) includes a progressive gap (600) between the first contact surface (318) and the second contact surface (320) larger at a first end (606) than at a second end (608) such that a first gap distance (700) at the first end (606) is greater than a second gap (704) distance the second end (608).
Abstract:
A system for coupling a first pipe segment (302) to a second pipe segment (304) includes a pin (310, 410), the pin (310) having a first outer diameter (318) and a second outer diameter (316), the second outer diameter (316) forming a recess (314) along at least a portion of the pin (310). The system also includes a box (312, 410), the box (312) having an opening (334), the opening (334) receiving at least a portion of the pin (310), wherein at least a portion of a wall of the opening (334) includes threads (336). The system further includes a rotating threaded collar (308) arranged within the recess (314), at least a portion of the rotating threaded collar (308) including mating threads (338) configured to engage the threads (336) of the box (312), wherein the rotating threaded collar (308) is rotatable about the pin (310).