Abstract: A hydraulic excavation apparatus may be used for providing access to a pipeline buried under shallow water or in wetland locations, for example, in order to install an electro-mechanical clamp on the pipeline. This clamp can then be used for connecting externals anodes to the pipeline, for monitoring the level of corrosion protection of the pipeline, or for any other purpose.

Abstract: A hydraulic excavation apparatus may be used for providing access to a pipeline buried under shallow water or in wetland locations, for example, in order to install an electro-mechanical clamp on the pipeline. This clamp can then be used for connecting externals anodes to the pipeline, for monitoring the level of corrosion protection of the pipeline, or for any other purpose.

Abstract: Apparatus 10 discloses a subsea monitoring station using solar cells to energize at least one electronic circuit incorporating at least one node having a determinable circuit value or other parameter test station providing a full time voltage readout, powered by the lights 16 on an ROV/AUV 14 or diver's lamp. An additional element of the apparatus is a subsea cathodic protection test station 18 incorporating a plurality of banks of solar cells 28 powering DC voltage test circuits having some form of parameter display, such as voltmeter readout 30, deriving voltage from ambient light 16 provided by outside sources, such as an ROV 14 or diver's lamp. The apparatus's cathodic protection test system includes four integral voltmeters 30 of which are powered with independent solar panels 28. The solar panels 28 are powered by artificial light 16 delivered by diver or submersible vehicle 14.

Abstract: The present invention 10 discloses a collapsible pod for providing cathodic protection to a preferred structure 12. The present invention 10 has a top frame 20 and a bottom frame 22 with a plurality of folding leg segments 24 positioned therebetween. The leg segments are comprised of the anode material having a pivot 30 positioned at each distal end. Also extending between the top 20 and bottom 22 frame is the folded retaining means 28 that prevents random deployment of the structure. To expand the structure the folded retaining means 28 is disengaged whereby the top 20 and bottom 22 frame are spaced apart by the segmented leg elements 24. Also shown are stabilizers 26 and a rest channel 32 for the upper anode. Also disclosed is a lock bracket 34 forming a dual pivot point 30 for each leg segment 24. The lock bracket 34 provides means whereby each leg segment 24 lays in communication with each other adding rigidity to the folded structure.

Abstract: A self-actuating clamp for attachment to a structural member in a subsea environment is disclosed. The clamp includes a housing having spaced side members, a transverse compression plate mounted between the members across the top of the housing and external accessory mounting surfaces. A pair of opposed, elongated jaw members have their upper portions disposed within the housing, the upper portions of which include upper ends adapted for pivotal mating engagement for permitting limited pivotal movement between the members, with the lower portions of the jaw members projecting below the housing and adapted for opposing clamping engagement with the subsea structural member. Force exerting means, which in one embodiment may comprise a pair of leaf spring assemblies, are provided to cooperate with the housing and jaw members to exert sufficient forces on the jaw members to clamp the jaw members to the exterior surface of the structural member.

Abstract: In a cathodic protection system for protecting a metal structure in contact with a surrounding electrolytic medium, method and apparatus are provided for directly measuring current density. A small metal sample cathode of a like material as the metal structure having a predetermined surface area exposed to the electrolytic medium is located adjacent the surface of the metal structure. A direct electrical path is completed between the sample cathode and the metal structure that is substantially IR free. At least a portion of the electrical path between the sample cathode and the metal structure is insulated from the surrounding electrolytic medium and the metal structure. A voltage directly proportional to the current passing through the electrical path is generated by disposing a toroidal coil in the insulated space by detecting the flux field associated with the current flow through the sample cathode.