Patent · US Expired

Method for conducting seismic surveys in waters covered with ice

US5113376A · kind A · utility

11Cited by
3References
3Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 15, 1991
Grant dateMay 12, 1992
Priority date—
Expiry dateFeb 15, 2011

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02A90/30
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

In seismic surveys in waters covered with ice, where seismic impulses are actuated under water and reflected signals are detected by a streamer cable (2) towed behind a vessel (1), in order to avoid the source of noise located outside the seismic system due to the icebreaking operation of the vessel (1) the vessel (1) is stopped during active survey and the streamer cable (3) is hauled in with a speed corresponding to the desired propulsion speed of the cable during detection. After detection the vessel again resumes ordinary operational speed and the streamer is paid out with a speed which maintains the desired advancing speed of the system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.