Operating method for making cable pass through overlong continuous oil pipe

The invention discloses an operating method for making a cable pass through an overlong continuous oil pipe. A continuous oil pipe (11) is put down along a straight well, a cable (4) is put down into the continuous oil pipe (11), and the cable passes through the whole continuous oil pipe (11) by means of self weight of the cable to fall to the bottom. The cable passes through the overlong continuous oil pipe by means of the self weight of the cable, so that the process is simple and safe, and the cost is low.