OIL-AND-GAS WELL CASING FAILURE ASSESSMENT METHOD Russian patent published in 2017 - IPC E21B47/00 

FIELD: measuring equipment.

SUBSTANCE: oil-and-gas well casing failure assessment method comprises a casing walls scanning with a sonic scanner on the fine resolution reflection waves application. In response to a columns inner wall digital 3D model building, one undertakes the identification, makes the quantitative assessment of the area and bulk indexes of the various failure modes. The inner wall position data are the instantaneous depth, the circular surface development 360° and the walls damage transverse extent which is determined by the time rating of the echo arrival from the columns wall with due allowance for the ultrasonic sound time rate in the borehole fluid.

EFFECT: integrity upgrading of the various forms of the columns walls failure recognition and increase of the failure quantitative characteristics assessment precision.

5 dwg