PROCEDURE FOR DETERMINATION OF HEAT CONDUCTION COEFFICIENT OF HEAT INSULATION OF HEAT INSULATED LIFT PIPE IN WELL Russian patent published in 2011 - IPC E21B36/00 G01N25/18 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in calculation of radius of heat influence of well, in measurement of natural temperature of frozen rock beyond boundaries of radius of heat influence of surveyed well. There is measured temperature in thermo-metric tubes secured in direction of the well by lowering temperature sensors in them at various depth corresponding to position of a heat insulated lift pipe (HLP) in the well. There is determined average value of temperature in thermo-metric tubes and there is measured temperature at wellhead. Further, there is calculated coefficient of heat conductivity of thermal insulation of HLP in well with consideration of heat conductivity of rock at near bore space, of radius of heat influence of well, of properties of various mediums between strings and other factors influencing value of coefficient of heat conductivity of HLP heat insulation.

EFFECT: continuous control of properties of heat insulation of heat insulated lift pipe in well along whole length of heat insulated string.

3 dwg