公开(公告)号：JPS5912357A

公开(公告)日：1984-01-23

申请号：JP11446283

申请日：1983-06-27

Applicant: Sundstrand Data Control

Inventor： KAATO II SUTEINKE

IPC: G01P15/03 ,  G01P1/00

CPC classification number: G01P1/00

公开(公告)号：JPS5946879A

公开(公告)日：1984-03-16

申请号：JP14453083

申请日：1983-08-09

Applicant: Sundstrand Data Control

Inventor： RANDO HAAREE HARUSHINGU ZA SEK ,  REKUSU BII PIITAAZU ,  KAATO II SUTEINKE

IPC: G01C9/00 ,  E21B47/022 ,  E21B47/12 ,  G01B11/26 ,  G01V1/40 ,  G01V8/10

CPC classification number: E21B47/022 ,  E21B47/123 ,  G01B11/26

Abstract: A borehole survey instrument has a probe with a polarized light system for transmitting a signal representing the angular orientation of the probe to the surface. Light from a source in the probe is directed through a polarizing filter with an axis of polarization orthogonal to the longitudinal axis of the probe. The polarized light beam is transmitted to the surface through an optical fiber light conduit. The angle of polarization is detected with a rotating polarizing filter and provides a measure of the probe orientation. In surveying a borehole, azimuth is determined from inclinometer measurements. The probe orientation in vertical sections of the borehole is measured by the polarized light system. Two measures of borehole azimuth are combined, providing an improved measure of azimuth in boreholes near vertical and near horizontal.