EQUIPMENT FOR WELL SURVEY Russian patent published in 2013 - IPC E21B47/06 E21B47/08 

FIELD: oil and gas industry.

SUBSTANCE: equipment contains thermal logging system made as a heater connected to power supply source, thermometer connected to recorder through amplifier and round-trip equipment made as a winch with controlled drive connected by its output to recorder. Round-trip equipment is connected kinematically to logging cable at which end heater and thermometer are fixed one by one. The equipment contains additionally control unit, switch and borehole geometry tool with end instrument. At that borehole geometry tool is fixed at logging cable above the heater and its output is connected through end instrument to control unit, which output is connected through switch either to control input of the heater supply source or to control input of the controlled drive of winch of the round-trip equipment.

EFFECT: obtaining unambiguous results of survey on thermal conductivity of formations surrounding the well with variable cross-section.

4 cl, 2 dwg