FIELD: oil-and-gas production.
SUBSTANCE: device contains ground-based equipment, connected by logging optical cable to borehole instrument, allowing flexible casing. Inside the casing there are located sensing elements, implemented in the form of optical fiber for direct and backward passing of light, semitransparent and cloudy mirrors. Center of gravity of borehole instrument is shifted relative to its longitudinal axis. One of sensing elements is implemented in the form of free loop. Loop contains linear and annular sections and is fixed in plane, passing through longitudinal axis of borehole instrument and its center of gravity. Additionally linear sections allows ability of lengthwise movement relative to flexible body, remaining equidistant to its generatrix.
EFFECT: excluding uncertainty of attitude position of sensing elements of the device in plane, perpendicular to axis of well and enhanced accuracy of received measurements.
2 dwg
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