Oil stealing hole plugging device and method

The invention discloses an oil stealing hole plugging device and method, and belongs to the field of oil stealing hole plugging. The device comprises a conical plug, a force transmission rod, a blow-down pipe, a sealing part and a hydraulic control force application device, wherein the two ends of the conical plug are a large-diameter end and a small-diameter end respectively; the lower end of theforce transmission rod is connected with the large-diameter end of the conical plug. The plugging device further comprises a sealing pipe, the sealing pipe sleeves the force transmission rod througha clearance, and the inner wall of the lower end of the sealing pipe is provided with an internal thread which is in threaded connection with a valve thread on an oil conveying pipeline; the force transmission rod can move up and down in the sealing pipe so as to insert the conical plug into an oil stealing hole in the oil conveying pipeline; the blow-down pipe is arranged on the lower portion ofthe sealing pipe and commun