Abstract: A subsea connection assembly has a stab plate a first stab plate which carries a first plurality of couplers and a second stab plate which carries a second plurality of couplers for mating engagement with the couplers in the first plurality as the stab plates are moved together. The assembly includes a mounting plate, a support which is disposed for lateral movement in at least one direction relative to the mounting plate, and a pivot which allows tilting movement of the first stab plate relative to the support. The tilting and translational features accommodate many different possible trajectories of a pulling unit. In particular, the assembly tolerates a separating action which is oblique to the normal mating and demating direction.

Abstract: A subsea connection system includes a support unit with a first connector and a distribution unit including an external frame to be landed on and supported by the support unit and an inner frame that is movable within the external frame. An outwardly facing connector may be connected via a long umbilical to a remote platform. Nevertheless, a nearby installation may be controlled via a short umbilical from another connector and thus the nearby installation does not require a long umbilical connected to the remote platform.

Abstract: A subsea connection system includes a support unit with a first connector and a distribution unit including an external frame to be landed on and supported by the support unit and an inner frame that is movable within the external frame. An outwardly facing connector may be connected via a long umbilical to a remote platform. Nevertheless, a nearby installation may be controlled via a short umbilical from another connector and thus the nearby installation does not require a long umbilical connected to the remote platform.

Abstract: A subsea connection assembly comprises a stab plate a first stab plate which carries a first plurality of couplers and a second stab platewhich carries a second plurality of couplers for mating engagement with the couplers in the first plurality as the stab plates are moved together. The assembly includes a mounting plate, a support which is disposed for lateral movement in at least one direction relative to the mounting plate, and a pivot which allows tilting movement of the first stab plate relative to the support. The tilting and translational features accommodate many different possible trajectories of a pulling unit. In particular the assembly tolerates a separating action which is oblique to the normal mating and demating direction.

Abstract: A securing device comprises an axially reciprocable drive shaft which has a head adapted to pass forwards through a detent plate. The head is adapted to engage the plate after rotation. A cam slot is defined in a drive housing and is engageable by a cam follower carried on the drive shaft. The cam slot has two end portions extending parallel to the axis of the drive shaft and an oblique intermediate part such that the drive shaft is rotated when the follower moves along the intermediate part and the drive shaft moves only axially when the follower moves along either of the end portions. A subsea assembly including the securing device includes a fixed stab plate including a central collar, and a free stab plate having an aperture through which said collar extends, the collar including an chamber defined by the detent plate.

Abstract: A solenoid-operated valve comprises an inlet valve member which is disposed to close in response to fluid pressure at an inlet port. A venting valve member is disposed relative to the inlet valve member so that closure of either valve member lifts the other. The valve includes at least one coil within which is a tubular assembly that forms a chamber with an operating space for the venting valve member and contains an armature for striking a rear part of the venting valve member when the coil is energised. The chamber includes a flux tube which provides a path for magnetic flux in parallel with the armature, the flux tube terminating before a region where the armature strikes the rear part of the venting valve member. A non-magnetic ring surrounds this region so that the density of the magnetic flux is increased in this region to increase the force with which the armature can strike the rear part of the venting valve member.

Abstract: A securing device comprises an axially reciprocable drive shaft which has a head adapted to pass forwards through a detent plate. The head is adapted to engage the plate after rotation. A cam slot is defined in a drive housing and is engageable by a cam follower carried on the drive shaft. The cam slot has two end portions extending parallel to the axis of the drive shaft and an oblique intermediate part such that the drive shaft is rotated when the follower moves along the intermediate part and the drive shaft moves only axially when the follower moves along either of the end portions. A subsea assembly including the securing device includes a fixed stab plate including a central collar, and a free stab plate having an aperture through which said collar extends, the collar including an chamber defined by the detent plate.

Abstract: A solenoid-operated valve comprises an inlet valve member which is disposed to close in response to fluid pressure at an inlet port. A venting valve member is disposed relative to the inlet valve member so that closure of either valve member lifts the other. The valve includes at least one coil within which is a tubular assembly that forms a chamber with an operating space for the venting valve member and contains an armature for striking a rear part of the venting valve member when the coil is energised. The chamber includes a flux tube which provides a path for magnetic flux in parallel with the armature, the flux tube terminating before a region where the armature strikes the rear part of the venting valve member. A non-magnetic ring surrounds this region so that the density of the magnetic flux is increased in this region to increase the force with which the armature can strike the rear part of the venting valve member.