A pipe joint and a joint connection device have simpler configurations while preventing fluid leakage and absorbing misalignment of shaft centers. A pipe joint includes a male joint and a female joint into which the male joint is inserted. The male joint has a male joint main body and a cap that is fixed at a base end of the male joint main body, with a male joint O-ring interposed between the cap and the male joint main body. The cross-section diameter of the male joint O-ring is 3 to 10 mm, and a clearance-between the male joint main body and the cap is 3 to 13% of the cross-section diameter of the male joint O-ring.

A pipe joint and a joint connection device have simpler configurations while preventing fluid leakage and absorbing misalignment of shaft centers. A pipe joint includes a male joint and a female joint into which the male joint is inserted. The male joint has a male joint main body and a cap that is fixed at a base end of the male joint main body, with a male joint O-ring interposed between the cap and the male joint main body. The cross-section diameter of the male joint O-ring is 3 to 10 mm, and a clearance-between the male joint main body and the cap is 3 to 13% of the cross-section diameter of the male joint O-ring.

The invention relates to a connection system for connecting lines requiring angular orientation to land based or subsea production structures, the system including a connector (200) and a connector receiver (100) secured to a production structure surface (110) adapted to receive the connector. The connector receiver includes guide slots (108) for receiving guide keys (208) of the connector. The guide slots serve to guide the connector into angular and axial alignment with the connector receiver and to provide a soft landing preventing damage to the connecting ends.

Various embodiments include an adapter between two connectors and a coaxial coupling or a coaxial nipple. The two connectors are any combination of a separate coupling and a separate nipple. The adapter may include: a body with two cylindrical openings; a first element that fits in the first opening with connections for a first of the two connectors and the coaxial coupling or nipple; and a second element that fits in the second cylindrical opening, and a third connection for the other connector. The first element slides and rotates in the body and has a central axis eccentric to a central axis of the cylindrical first element part. The second element slides and rotates in the body. The central axis of the third connection is eccentric to a central axis of the cylindrical second element part.

Various embodiments include an adapter between two connectors and a coaxial coupling or a coaxial nipple. The two connectors are any combination of a separate coupling and a separate nipple. The adapter may include: a body with two cylindrical openings; a first element that fits in the first opening with connections for a first of the two connectors and the coaxial coupling or nipple; and a second element that fits in the second cylindrical opening, and a third connection for the other connector. The first element slides and rotates in the body and has a central axis eccentric to a central axis of the cylindrical first element part. The second element slides and rotates in the body. The central axis of the third connection is eccentric to a central axis of the cylindrical second element part.

A rotary union for distributing flowing material, and includes a central shaft having an upper end defining at least one inlet configured for receiving the material, and being in communication with a pocket configured for receiving the material, a lower end of the pocket defining at least one outlet port. An annular sleeve surrounds and rotates relative to the central shaft, the sleeve being provided with a plurality of radially-spaced outlet nipples. A gap is defined between an exterior surface of the central shaft and an interior surface of the sleeve, and at least one seal is disposed in the gap for isolating the gap from the material flowing through the outlet port and into the nipples. The central shaft is provided in vertically-stacked components including an upper, inlet portion, a middle or central delivery portion including the pockets and the outlets, and a lower-most base portion.

A rotary union for distributing flowing material, and includes a central shaft having an upper end defining at least one inlet configured for receiving the material, and being in communication with a pocket configured for receiving the material, a lower end of the pocket defining at least one outlet port. An annular sleeve surrounds and rotates relative to the central shaft, the sleeve being provided with a plurality of radially-spaced outlet nipples. A gap is defined between an exterior surface of the central shaft and an interior surface of the sleeve, and at least one seal is disposed in the gap for isolating the gap from the material flowing through the outlet port and into the nipples. The central shaft is provided in vertically-stacked components including an upper, inlet portion, a middle or central delivery portion including the pockets and the outlets, and a lower-most base portion.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

Each of the mechanical seal devices of a rotary joint includes a first shaft side seal ring attached to a shaft body and a first case slide seal ring attached to one side of the first shaft side seal ring as well as a second case side seal ring attached to a case body and a second shaft side seal ring attached to the second case side seal ring. A first communication flow passage is formed between a first sliding portion of the first seal rings and a second sliding portion of the second seal rings. A second communication flow passage is formed between the first sliding portion of a mechanical seal device disposed on one side in the axial direction and the second sliding portion of a mechanical seal device disposed on the other side in the axial direction in mechanical seal devices adjacent to each other.