FIELD: oil and gas industry.
SUBSTANCE: invention refers to oil and gas industry and can be implemented for measurement of internal size of borehole of hydrocarbon well. A logging device for measurement of at least one parametre of well borehole contains at least one device for measurement of internal size of well borehole. The device consists of an apparatus designed to be installed inside the well borehole. The apparatus contains an optical hole caliper with an optical sensor facilitating a response correlated with an internal size of the well borehole. The optical sensor is connected with an optical fiber and contains Bragg grating connected to a lever of the hole caliper, contacting with a wall of the well borehole.
EFFECT: increased reliability of device due to cancellation of electronics in elements operating in well borehole.
6 cl, 6 dwg
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