Adjustable sensor streamer stretch section for noise control for geophysical sensor streamers
AssigneePGS Geophysical AS
InventorsAndras Robert Juhasz, Gustav Göran Mattias Südow, Rune Johan Magnus Mattsson, Ulf Peter Lindqvist
Life of this patent
Estimating the term…
Abstract
A sensor streamer stretch section includes at least one spring. A means for coupling the spring at each end to at least one of a sensor streamer and a lead in cable is included. A cable is coupled at its ends to the means for coupling. The cable is capable of carrying at least one of electrical and optical signals. The cable is formed such that the cable undergoes substantially no axial strain when the shock cord is elongated. An adjustable damper is coupled between the means for coupling at each end of the stretch section.
Claims20
A sensor streamer stretch section comprising:
- a first termination plate on a first longitudinal end of the sensor streamer stretch section;
- a second termination plate on a second longitudinal end of the sensor streamer stretch section;
- an adjustable damping device coupled to each termination plate, and the adjustable damping device configured to provide a predetermined damping coefficient for the sensor streamer stretch section;
- at least one spring member, wherein:
- each spring member is coupled to each termination plate;
- and
- the number of spring members and a characteristics of each spring member configured to provide a predetermined spring constant for the sensor streamer stretch section.
A sensor streamer stretch section comprising:
- a first termination plate on a first longitudinal end of the sensor streamer stretch section;
- a second termination plate on a second longitudinal end of the sensor streamer stretch section;
- a spring member coupled to each termination plate, the spring member configured to provide a predetermined spring constant;
- and
- a spring length controller coupled between an end of the spring member and one of the termination plates, wherein the spring length controller is configured to adjust the spring constant of the spring member.
A marine geophysical survey system comprising:
- a survey vessel;
- a sensor streamer;
- a lead in cable coupled at one end to the survey vessel and at the other end to the sensor streamer;
- and
- a sensor streamer stretch section disposed at a location selected from the group consisting of:
- between the lead in cable and the sensor streamer, and an intermediate position along the sensor streamer;
- the sensor streamer stretch section comprises:
- a first termination plate on a first longitudinal end of the sensor streamer stretch section;
- a second termination plate on a second longitudinal end of the sensor streamer stretch section;
- a damping device couple to each termination plate, the damping device configured to provide damping of forces between the first and second termination plates;
- a spring member coupled to each termination plate;
- and
- a spring length controller coupled between the spring member and the first termination plate, the spring length controller configured to adjust the spring constant of the spring member.
A marine geophysical survey system comprising:
- a survey vessel;
- a sensor streamer;
- a lead in cable coupled at one end to the survey vessel and at the other end to the sensor streamer;
- and
- a sensor streamer stretch section disposed at a location selected from the group consisting of:
- between the lead in cable and the sensor streamer, and an intermediate position along the sensor streamer;
- the sensor streamer stretch section comprises
- a first termination plate on a first longitudinal end of the sensor streamer stretch section;
- a second termination plate on a second longitudinal end of the sensor streamer stretch section;
- a spring member coupled to each termination plate;
- and
- a spring length controller coupled between an end of the spring member and the first termination plate, the spring length controller configured to adjust the spring constant of the spring member.
Dependencies are inferred from the claim text.