Seismic streamer trim section

Abstract

A system for selectively tuning the buoyancy of a marine seismic streamer or underwater cable. Trimming weights are positioned along the streamer cable and can be integrated within a solid buoyancy member or can be located within an outer streamer sheath. The weights overcome the flotation forces provided by an internal buoyancy section to control the elevation of the streamer section. The outer streamer sheath can be opened to permit the removal or addition of trimming weights to the streamer section, and can be resealed to prevent water from intruding into the streamer interior. A single trimming weight can be positioned along the buoyancy member, or a plurality of trimming weights can be used. The trimming weights permit a tight buoyancy range to be accomplished without increasing water drag forces or noise as the streamer is towed.

Dependencies are inferred from the claim text.