METHOD FOR OPTICAL-FIBRE CABLE TRIPPING-IN INTO STEAM-INJECTION WELL AND DEVICE TO MEASURE TEMPERATURE DISTRIBUTION Russian patent published in 2013 - IPC E21B23/14 

FIELD: oil and gas industry.

SUBSTANCE: method involves running-in of optical-fibre cable wound onto a transportation drum in tubing-casing annulus and recording of temperature distribution in a well. Before running-in into a well the cable is placed into a coil-tubing; then coil-tubing is run-in into tubing-casing annulus of the well by means of transportation drum rotation along length of the well from the mouth till the borehole; the coil tubing is stretched along the whole length of a steam-injection well and data of temperature distribution in the well are recorded. The device includes an optical-fibre cable consisting of optical fibre run-in into the well, the upper end of the optical-fibre cable is connected to equipment for recording temperature distribution in the well, which is placed in the mouth. The optical-fibre cable is placed concentrically inside a flexible tubing, at that the lower end of the cable is fixed in a cap screwed onto the lower end of the coil-tubing; In this connection in the cap there are holes and geometrical size of these holes allow coil-tubing stretching under overpressure inside the coil-tubing.

EFFECT: improvement of reliability for running-in operation, placement of the optical-fibre cable and measurement of temperature distribution.

2 cl, 3 dwg