초록 ▼

A device for seismic exploration is in the form of a towed streamer. The streamer is easily managed, is very flexible and has a low weight so that it may be towed with moderate tractive forces. The streamer includes a cable with an inner core, one or more layers of insulated conductor pairs and an o

A device for seismic exploration is in the form of a towed streamer. The streamer is easily managed, is very flexible and has a low weight so that it may be towed with moderate tractive forces. The streamer includes a cable with an inner core, one or more layers of insulated conductor pairs and an outer low-friction protective coating. Both the core and the outer low-friction protective layer are of an acoustically substantially inert material of low specific gravity. Seismic signals are obtained series connected gimbal-mounted geophones arranged in strings connected to the cable at positions spaced longitudinally thereof.

대표청구항 ▼

An apparatus for seismic exploration to be towed on a land surface and suitable for use on ice/snow surfaces, said apparatus comprising: a towable main cable comprising a plurality of linked cable sections each formed by a core capable of absorbing the stress of towing, at least one layer surroundin

An apparatus for seismic exploration to be towed on a land surface and suitable for use on ice/snow surfaces, said apparatus comprising: a towable main cable comprising a plurality of linked cable sections each formed by a core capable of absorbing the stress of towing, at least one layer surrounding said core and formed of insulated conductor pairs of electrically conductive material for the transmission of received signals, and a sheath surrounding and protecting said at least one layer of conductor pairs. a plurality of geophone strings connected to said main cable at positions spaced longitudinally thereof, each said geophone string having spaced therealong a plurality of geophones electrically connected to said main cable, each said geophone string being capable of being aligned to extend outwardly in varying directions from said main cable with said plurality of geophones of each said geophone string being located at different distances from said main cable; said core and said sheath each being formed of acoustically substantially inert material sufficient to substantially not interfere with seismic signals received by said geophones and transmitted to and by said at least one layer of conductor pairs; and said main cable having an outer diameter of less than 25 mm and a weight of less than 500 g per meter; whereby said main cable with geophone strings connected thereto has a degree of flexibility and ease of handling sufficient to enable the same to be wound or coiled in the manner of a rope and to glide over a ground surface under extreme temperature conditions.