Patent ID: 10435988

Abstract:
A mechanical drilling and removal tool and method for use in wireline and other operations for drilling through and removing paraffin, scale and other deposits from tubing in oil wells, all without the need for any electrical or hydraulic input to the tool, the tool comprising: (a) a tool body having an outer surface removably engageable with the inner wall of oil well tubing and having a threaded inner surface for receiving a threaded shaft, the outer surface of the tool body being engageable with the inner wall of oil well tubing when a rapid dynamic upward force is applied to the tool body and being disengageable when a steady upward force is applied; (b) a threaded shaft having a head end, a threaded body, and a threaded bit end and having the body threads complementary to the threaded inner surface of the tool body, the shaft being movable longitudinally downward through the tool body when a downward force is applied to the head end while the tool body is engaged with the inner wall of oil well tubing, thereby causing the shaft to rotate within the tool body and causing the threaded bit end to drill into and collect between paddle threads on the bit a deposit disposed below the tool body; and (c) a ratchet, attached to the head end portion of the shaft, to prevent the shaft from rotating when the shaft is moved longitudinally upward, thereby allowing the entire drilling and removal tool, along with the collected deposit, to be removed from the oil well tubing when a steady upward force is applied to the head end of the shaft. The bit can be a separate piece removably connected to the threaded shaft.