Patent ID: 8902696
Filing Date: 2014-12-02
Classification: B63B,G01V

Abstract:
1. A towed-array seismic survey spread, comprising: a plurality of lead-ins operable to be towed by a vessel, wherein, each one of the plurality of lead-ins tows at least one streamer; at least one submerged positioning device attached to the each one of the plurality of lead-ins; at least another submerged positioning device attached to either the each one of the plurality of lead-ins or a head of the at least one streamer; and wherein the positioning devices provide force in an outboard crossline direction offsetting hydrodynamical forces on the plurality of lead-ins and the at least one streamer to maintain the at least one streamer's position relative to the vessel's sail line, and wherein a number of the submerged positioning devices is equal to or greater than a number of the streamers, and the number of submerged positioning devices on each respective lead-in increases from one lead-in to the next from the lead-in closest to the vessel's sail line to the lead-in farthest from the vessel's sail line.