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Novel seismic acquisition cable and method

A cable and a new technology, applied in the field of new seismic acquisition cables, can solve the problems of reducing the resolution of digital seismic cables to the source signal, strong noise of digital seismic cables, strong vibration of digital seismic cables, etc.

Pending Publication Date: 2021-09-28
THE FIRST INST OF OCEANOGRAPHY SOA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a new type of seismic acquisition cable and its method, the purpose of which is to solve the problem that during the acquisition process of the existing digital seismic cable, strong noise is generated on the digital seismic cable due to the sound emitted by the navigation of the acquisition ship , and when moving, moisture will have a strong impact on the front section of the digital seismic cable, which will cause a strong vibration in the digital seismic cable, and the rear section of the digital seismic cable will also produce strong vibration due to the influence of ripples, so Reduced resolution of source signals by digital seismic cables

Method used

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Embodiment 1

[0046] Refer to attached Figure 1-10 As shown, the present invention provides a technical solution: a novel seismic acquisition cable, comprising a front shock absorbing section 100, a first working section 200, a second working section 300, a rear shock absorbing section 400 and an empennage 500 connected in sequence;

[0047] Refer to attached Figure 1~3 As shown, the front shock absorption section 100 includes a cable joint 110, a first housing 120 and a shock pad 130, and one end of the cable joint 110 is screwed to the first housing 120, and the first housing 120 is arranged in a "bullet" shape. The end of the first housing 120 close to the cable connector 110 is provided with a wire-passing hole 121, and a shock-absorbing pad 130 is fixedly connected along the inner wall of the first housing 120, and a collection channel 122 is formed in the middle thereof, and the collection channel 122 and the wire-passing hole 121 connected; wherein, the shock absorbing pad 130 inc...

Embodiment 2

[0072] Refer to attached Figure 11 As shown, the working method of a kind of novel seismic acquisition cable that the embodiment of the present invention provides additionally, comprises the following steps:

[0073] S1, the shock absorption of the front shock absorbing section 100: the first casing 120 arranged in the shape of a "bullet" diverts the water, weakens the impact of the water flow on the first casing 120, and utilizes the first noise reduction layer 132, the first The damping layer 133, the second noise reducing layer 135 and the second noise reducing layer 135 combine to carry out noise reduction and shock absorption;

[0074] S2, rear shock absorption section 400 shock absorption: when the water flow vibrates the second housing 410, the vibration force causes the piston rod 437 to drive the piston piece 438 to squeeze the liquid in the extrusion chamber 432, and part of the liquid will flow from the side close to the sealing cover 435 The diversion hole 434 en...

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Abstract

The invention provides a novel seismic acquisition cable and method, and belongs to the technical field of seismic acquisition cables. The novel seismic acquisition cable comprises a front damping section, a first working section, a second working section, a rear damping section and a tail wing which are connected in sequence, wherein the front damping section comprises a cable connector, a first shell and a damping pad, one end of the cable connector is in threaded connection with the first shell, the first shell is arranged in a bullet shape, a wire passing hole is formed in the end, which is close to the cable connector, of the first shell, a main control chip controls an electromagnetic valve and opens a first electromagnet and a second electromagnet after judging that the pressure value of a cable is abnormal, through opposite attraction of the first electromagnet and the second electromagnet, a sliding block moves towards the first electromagnet along the sliding way, a limiting rod is separated from the limiting cavity, meanwhile, compressed air in a compression cavity is injected into an air bag through a flow guide pipe, and the air bag is expanded to the outside from an expansion containing cavity.

Description

technical field [0001] The invention belongs to the technical field of seismic acquisition cables, and in particular relates to a novel seismic acquisition cable and a method thereof. Background technique [0002] Marine artificial reflection seismic detection is an important geophysical prospecting method. It is of great strategic significance for resource investigation, division of sedimentary structural units, and investigation of engineering geological hazards, especially for energy sources such as marine oil and gas and gas hydrate. In traditional 3D seismic detection, in order to avoid cable entanglement and ensure cable safety, the distance between cables is relatively small (usually greater than 25 meters), which leads to low lateral resolution of seismic detection. [0003] Horizontal cable towed 3D seismic acquisition is a new type of artificial reflection seismic detection method. Two towing body separators are used to deploy a horizontal acquisition cable and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/282H01B7/17G01V1/20G01L11/00
CPCH01B7/189H01B7/18H01B7/282H01B7/17G01V1/201G01V1/202G01L11/00G01V2001/205G01V2001/207
Inventor 华清峰刘晨光李西双裴彦良刘保华李先锋连艳红陈自力
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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