TOWING SEISMIC STREAMER USED IN MARINE SEISMIC SURVEYING

摘要

The invention concerns methods and apparatus for 3D marine seismic surveying, in which an array of laterally-spaced streamers (14) containing hydrophones is towed behind a survey vessel (10). To reduce the drag produced by the array, instead of towing each streamer (14) by its own armoured lead-in (18, 20), at least two streamers on each side of the vessel are towed from a respective single armoured lead-in. Each of these single lead-ins (18, 20) has a connector device (22, 24, 26) with a towing attachment series connected in it, the connector device (22, 24, 26) having a body (44) which transmits towing forces between the armoured outer sheath of the portions of the lead-in connected to each side of the connector device (46), and a towing attachment (72) secured to the body (44).