METHOD AND DEVICE FOR WELL SURVEY BASED ON INFRARED WELL WALL RADIATION Russian patent published in 2008 - IPC E21B47/00 E21B47/06 

FIELD: well survey, particularly to control technical condition of oil well sections over or under hydrostatic well level, as well as of gas well under pressure, by repeated non-contact measurement of infrared well wall surface radiation.

SUBSTANCE: device comprises body, protective optical system window, infrared radiation receiver, modulator, thermostat, infrared radiation chopping frequency stabilizing block, thermostating and thermostabilizing unit, signal amplifying and converting unit, body temperature sensor, electronic body temperature sensor signal amplifying unit; electronic protective window radiation compensation unit. Receiver pickup converts infrared well wall radiation and protective window radiation into electric signal. Contact temperature sensor installed in device body generates electric signal, which is proportional to protective window temperature. Said signal is supplied to electronic body temperature sensor signal amplifying unit and to compensation unit and is mixed with electric signal generated by radiation receiver to compensate signal component defined by protective window radiation in real time so that user registers only electric signal proportional to infrared well wall radiation.

EFFECT: decreased measurement time along with decreased costs.

2 cl, 1 dwg