Integrated efficient windowing sidetrack drilling tool

Abstract

The invention relates to an integrated efficient windowing sidetrack drilling tool comprising a milling taper (1), a high-pressure pipe (2) and a protecting cylinder (3). A fixed plate (15) is arranged in the position, attached to the taper head of the milling taper (1), of the protecting cylinder (3); a high-pressure pipe nipple (16) is arranged between the upper end of the high-pressure pipe andthe milling taper, and the middle of the high-pressure pipe nipple (16) is welded to the fixed plate (15); a plurality of first backpitch grooves are formed in the outer wall of a crown part (17) atthe lower end of the milling taper, and a plurality of first cutting edges (18) are welded between the first backpitch grooves; and a plurality of second backpitch grooves (19) are formed in the positions, above the milling taper crown part (17), of the tapered face and the cylindrical face of the milling taper correspondingly, and a plurality of second cutting edges (20) are welded between the second backpitch grooves. The integrated efficient windowing sidetrack drilling tool is reliable in using performance, the operation success rate is high, and the phenomenon that tapered iron is damagedand fractured is avoided; the windowing speed is high, and the window shape is regular, so that a dead step is not formed, the windowing success rate is high, and the overall efficiency is high; andthe construction period can be shortened, and the drilling cost can be reduced.

Description

technical field [0001] The invention relates to petroleum tools, in particular to a sidetracking tool for opening windows. Background technique [0002] Window sidetracking tool is a tool for laterally re-drilling inclined wells for oil wells or water wells with severely damaged lower casings in oilfield workover projects, to achieve the purpose of using upper casings, or to use the original wellbore for orientation in order to save drilling costs. Sidetracking to restore productivity to abandoned wells. Since the existing side-drilling tool cannot ensure that the high-pressure pipe is cut at a position close to the crown of the milling cone, the remaining length of the high-pressure pipe connected to the crown of the milling cone is large. When the milling cone moves down along the surface of the inclined iron during normal milling, the high-pressure pipe will be wound around the milling cone with the rotation of the milling cone, which will not only make the high-pressure...

AI Technical Summary

Problems solved by technology

Because the existing window sidetracking tools cannot ensure that the high-pressure pipe is cut near the crown of the milling cone, the remaining length of the high-pressure pipe connected to the crown of the milling cone will be relatively large

When the milling cone moves down along the surface of the inclined iron, during the normal milling process, the high-pressure pipe will wrap around the milling cone as the milling cone rotates, which will not only make the high-pressure pipe connected to the milling cone difficult to be milled off, but also affect the milling Cone mills the tube wall on one side of the casing

Its use performance is unreliable, the success rate of operation is not high, and it is prone to damage and fracture of inclined iron

The opening speed of the window is not fast enough, the window will be uneven and smooth, and the shape will be irregular, and the window will easily form dead steps

As a result, the success rate of window opening is not high, and the safety reliability is not high enough, which will increase the number of trips, greatly increase the construction period, increase the drilling cost, and the overall efficiency is low

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