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US 4,910,715 AGranted
Marine seismic streamer cable
OwnerCarl H. Savitinventor
Life of this patent
Estimating the term…
Abstract
A plurality of sensor arrays are mounted in a streamer cable. The sensors within each array are distributed over an elongated two-dimensional vertical plane. The seismic streamer cable is so constructed that its vertical dimension is substantially greater than its width and the top portion is relatively more buoyant in the water than the bottom portion. Because of that configuration the streamer cable resists vertical strumming and, when the sensor arrays are used in the differential mode, there is no orientation uncertainty.
Claims10
A marine seismic streamer cable comprising:
- a plurality of arrays of seismic-signal sensors, the seismic-signal sensors within each said array being disposed over an elongated, substantially two-dimensional, vertical plane;
- signal transmission means for interconnecting the corresponding arrays with a signal utilization device;
- an elongated flexible jacket means, having a longitudinal axis, a top portion and a bottom portion, for enclosing said arrays of seismic-signal sensors and said signal transmission means, one dimension of said jacket means as measured perpendicular to said longitudinal axis being significantly greater than the other dimension as measured transversely to said longitudinal axis;
- elongated stress-member means embedded in said jacket;
- and
- non-volatile floatation means embedded near the top portion of said jacket and distributed substantially uniformly along its length.
3 more elements
A marine streamer cable, comprising:
- an elongated, flexible jacket means that is characterized by a longitudinal axis, and top and bottom portions, the vertical height of said jacket means being significantly greater than the horizontal width;
- floatation material distributed uniformly along the top portion of said jacket to render said marine streamer cable substantially neutrally buoyant;
- a plurality of arrays of seismic-signal sensors enclosed by said jacket, the seismic-signal sensors within each array being disposed over an elongated, two-dimensional, vertical plane parallel to said longitudinal axis.
An instrumented streamer cable comprising:
- a first plurality of sensors,
- a second plurality of sensors,
- means within the cable for maintaining said first plurality of sensors above said second plurality of sensors,
- wherein the vertical height of said cable is significantly greater than the horizontal width.
1 more element
Dependencies are inferred from the claim text.