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AssigneeSchlumberger Technology Corporation
InventorsNils Lunde, Simon Hastings Bittleston, Gunnar Parmann, Jan-Age Langeland
Estimating the term…
A seismic streamer comprises a substantially solid core having many of the main components of the streamer, namely hydrophones, electronics modules for digitising the outputs of the hydrophones, the main optical and electrical conductor bundles and Keviar strength members, embedded in it. The core also contains a large number of foam buoyancy elements. An outer skin surrounds the core, defining an annular gap around the core, and this annular gap is filled with open-celled polyurethane foam saturated with kerosene. The capsules containing the hydrophones communicate with the annular gap around the core, so that the kerosene can enter the capsules, each of which contains an open-celled polyurethane foam sheath to cushion the hydrophone. In an alternative construction, made possible by using the buoyancy elements in the core to render the core approximately neutrally buoyant in water, the outer skin and the polyurethane foam are omitted, and the core is used on its own as a solid streamer.
A seismic streamer comprising an elongate substantially solid core, at least one longitudinally extending strength member and a plurality of hydrophones embedded in said core, a plastics outer skin surrounding said core and defining therearound an annular space, and plastics foam material adapted to be substantially saturated with liquid and substantially filling said annular space.
A seismic streamer comprising an elongate plastics tube, at least one elongate strength member disposed within the tube and extending longitudinally thereof a plurality of buoyancy elements which engage the strength member at intervals therealong, and a plurality of hydrophones longitudinally spaced apart within the tube and disposed between the buoyancy elements, the tube containing a substantially solid plastics or gel filler material around the hydrophones and the buoyancy elements.
A method of making a seismic streamer, the method comprising the steps of:
A method of making a marine seismic streamer comprising an elongate substantially solid core, and at least one longitudinally extending strength member and a plurality of hydrophones embedded in said core, the method comprising the steps of:
Dependencies are inferred from the claim text.