Abstract: A marine riser component which has an integrated fatigue damage sensor in which the sensor is adapted to be damaged by stresses and strains applied to the marine riser component, and is adapted to record said damage on the sensor. The sensor is optionally integrated into the body of the marine riser component in a location on the component that transmits fatigue loads to the sensor at a known stress concentration factor, optionally in a recess on the body, for example, in a closed recess on an outer surface of the marine riser component.

Abstract: Disclosed is a tubular pipe string element having a pin connector and a box connector complementary to the pin connector. The pin and box connectors are rotationally engageable with the respective box and pin connectors of another pipe string element and have complementary anti-rotation devices that cooperate to prevent unintentional relative rotation between the connectors. The anti-rotation devices may include saw-tooth profiled, radially extending teeth and a steep trailing tooth flank angle for the pin member, and at least one detent member formed on the pipe string element for the box connector. When securing the pin and box connectors, the leading flanks of the teeth engage with the detent members while allowing the connectors to rotate into a fully connected position. The steep trailing tooth flank is trapped by the detent member when in the fully connected position to prevent unintentional release of the connection.

Abstract: An improved drilling riser assembly including a male drilling riser assembly section and a female drilling riser assembly section that form a connection joint when mated. The drilling riser assembly sections having an internal stab type main drilling riser connector. The drilling riser assembly sections each have main drilling riser flanges that have helically threaded rings on an outer edge of the flange. A box and pin connector each have an inner helically threaded ring that mates with the outer helical flange ring of a drilling riser assembly section. The box and pin connectors extend towards each other and make up an enclosed compression joined mating section around the stab type connectors of the drilling riser assembly.

Abstract: Disclosed is a tubular pipe string element having a pin connector and a box connector complementary to the pin connector. The pin and box connectors are rotationally engageable with the respective box and pin connectors of another pipe string element and have complementary anti-rotation devices that cooperate to prevent unintentional relative rotation between the connectors. The anti-rotation devices may include saw-tooth profiled, radially extending teeth and a steep trailing tooth flank angle for the pin member, and at least one detent member formed on the pipe string element for the box connector. When securing the pin and box connectors, the leading flanks of the teeth engage with the detent members while allowing the connectors to rotate into a fully connected position. The steep trailing tooth flank is trapped by the detent member when in the fully connected position to prevent unintentional release of the connection.

Abstract: An improved drilling riser assembly including a male drilling riser assembly section and a female drilling riser assembly section that form a connection joint when mated. The drilling riser assembly sections having an internal stab type main drilling riser connector. The drilling riser assembly sections each have main drilling riser flanges that have helically threaded rings on an outer edge of the flange. A box and pin connector each have an inner helically threaded ring that mates with the outer helical flange ring of a drilling riser assembly section. The box and pin connectors extend towards each other and make up an enclosed compression joined mating section around the stab type connectors of the drilling riser assembly.

Abstract: An improved drilling riser assembly including a male drilling riser assembly section and a female drilling riser assembly section that form a connection joint when mated. The drilling riser assembly sections having an internal stab type main drilling riser connector. The drilling riser assembly sections each have main drilling riser flanges that have helically threaded rings on an outer edge of the flange. A box and pin connector each have an inner helically threaded ring that mates with the outer helical flange ring of a drilling riser assembly section. The box and pin connectors extend towards each other and make up an enclosed compression joined mating section around the stab type connectors of the drilling riser assembly.

Abstract: An improved drilling riser assembly including a male drilling riser assembly section and a female drilling riser assembly section that form a connection joint when mated. The drilling riser assembly sections having an internal stab type main drilling riser connector. The drilling riser assembly sections each have main drilling riser flanges that have helically threaded rings on an outer edge of the flange. A box and pin connector each have an inner helically threaded ring that mates with the outer helical flange ring of a drilling riser assembly section. The box and pin connectors extend towards each other and make up an enclosed compression joined mating section around the stab type connectors of the drilling riser assembly.

Abstract: A pipe connector comprises a tubular pin member having a frustoconical outer surface and a tubular box member having a frustoconical inner surface corresponding to the outer surface of the pin member and which overlies the frustoconical surface of the pin member when the members are fully engaged. The members are provided with inter-engageable annular projections and grooves on the said peripheral surfaces for axially locking the members together when they are fully engaged together. The projections and grooves are spaced apart along the surfaces. The inner tubular surface of the pin member and an outer tubular surface of the box member each include at least one of a recess and/or a protrusion/radially enlarged section which reduces and/or increases the thickness of the tubular wall along the length of the associated member so as to balance the displacement of the members at different points along the length thereof under injection pressure.

Abstract: A pipe connector comprises a tubular pin member (1) having a frustoconical outer surface (3) and a tubular box member (2) having a frustoconical inner surface (4) corresponding to the outer surface (3) of the pin member (1) and which overlies the frustoconical surface (3) of the pin member (1) when the members (1, 2) are fully engaged. The members (1, 2) are provided with inter-engageable annular projections (5) and grooves (6) on the said peripheral surfaces (3, 4) for axially locking the members together when they are fully engaged together. The projections (5) and grooves (6) are spaced apart along the surfaces (3, 4).

Abstract: A pipe connector includes a tubular pin member having a generally frusto-conical outer peripheral surface and a tubular box member having a generally frusto-conical inner peripheral surface corresponding to the frusto-conical outer peripheral surface of the pin member and overlies the frusto-conical surface of the pin member when the members are fully engaged together. The members include with inter-engageable annular projections and grooves on the said peripheral surfaces for axially locking the members together when they are fully engaged together, the projections and grooves being spaced apart along the surfaces. Means are provided for supplying hydraulic fluid under pressure between the overlying parts of the surfaces of the members when fully engaged together to expand the box member and/or contract the pin member to bring the projections out of engagement with the corresponding grooves and permit the members to be disengaged.