Abstract: A test arrangement for use in determining the location of a fault in an installation 10 comprising at least first and second conductors 22, 24 providing electrical connections between a surface located device 12 and a subsea located device 20, the test arrangement comprising a first module 26 operable to apply a common test signal between ground and the first and second conductors 22, 24, and a second module 28 operable to monitor the total current flowing through the first and second conductors 22, 24 at a subsea location.

Abstract: A locking device fix a threaded pressure fitting having clamp members, and a clamping load is applied to the clamp members to clamp the clamp members to one another. Each clamp member has a first insert and a second insert held captive thereto, and each insert has a bearing face adapted to cooperate with and bear against part of the pressure fitting, in use, at least the first insert associated with each of the clamp members is angularly moveable relative thereto to permit the bearing face of each first insert to be orientated differently to the bearing face of the associated second insert.

Abstract: A rejuvenation method for a cable used in a subsea environment, the method comprising applying a bias signal to a conducting element 2a, 2b of the cable 2, the bias signal being selected to improve the insulation properties of the cable 2.

Abstract: A pressure compensating device for compensating fluid pressure within a sealed enclosure comprises a cylinder divided into a first chamber and a second chamber by a piston, wherein: the first chamber communicates with the enclosure and the second chamber communicates with the environment; the piston is arranged to adjust the relative volumes of the first and second chambers in response to a difference in pressure between the said chambers by moving within the cylinder; and the piston is arranged to allow fluid communication between the enclosure and the environment when the piston is in at least one position within the cylinder.

Abstract: A test arrangement for use in determining the location of a fault in an installation 10 comprising at least first and second conductors 22, 24 providing electrical connections between a surface located device 12 and a subsea located device 20, the test arrangement comprising a first module 26 operable to apply a common test signal between ground and the first and second conductors 22, 24, and a second module 28 operable to monitor the total current flowing through the first and second conductors 22, 24 at a subsea location.

Abstract: A subsea separation device for use in separating a pair of stabplate connector plates, the subsea separation device comprising a first engagement member adapted to engage, in use, a first one of the connector plates, or a component rigidly secured thereto, a second engagement member adapted to engage, in use, a second one of the connector plates or a component rigidly secured thereto, and drive means operable to urge the first and second engagement members apart and so urge the connector plates apart.

Abstract: A locking device for a threaded pressure fitting, the locking device comprising first and second clamp members, clamp means operable to apply a clamping load to the first and second clamp members to clamp the first and second clamp members to one another, each clamp member having a first insert and a second insert held captive thereto, each insert having a bearing face adapted to cooperate with and bear against part of the pressure fitting, in use, at least the first insert associated with each of the first and second clamp members being angularly moveable relative thereto to permit the bearing face of each fast insert to be orientated differently to the bearing face of the associated second insert.

Abstract: A pressure compensating device for compensating fluid pressure within a sealed enclosure comprises a cylinder divided into a first chamber and a second chamber by a piston, wherein: the first chamber communicates with the enclosure and the second chamber communicates with the environment; the piston is arranged to adjust the relative volumes of the first and second chambers in response to a difference in pressure between the said chambers by moving within the cylinder; and the piston is arranged to allow fluid communication between the enclosure and the environment when the piston is in at least one position within the cylinder.

Abstract: A subsea separation device for use in separating a pair of stabplate connector plates, the subsea separation device comprising a first engagement member adapted to engage, in use, a first one of the connector plates, or a component rigidly secured thereto, a second engagement member adapted to engage, in use, a second one of the connector plates or a component rigidly secured thereto, and drive means operable to urge the first and second engagement members apart and so urge the connector plates apart.