Machine-clamped cutter block milling-free whipstock milling cone structure and sleeve windowing method

Through the milling cone structure of the machine clipping block without milling, the wear problem caused by the direct contact between the milling cone and the inclined device in the prior art is solved, and the efficient and low-cost window opening side drilling effect is achieved, and the equipment service life is extended.

CN119711981AActive Publication Date: 2025-03-28CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202311248330.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-26
Publication Date
2025-03-28
Estimated Expiration
2043-09-26

AI Technical Summary

Technical Problem

In the existing window opening side drilling tools, the milling cone is in direct contact with the oblique means, which makes it easy to wear the oblique means during the window opening process, and the cemented carbide cannot be repaired in time after wear, affecting the size and cost of the window opening borehole.

Method used

The milling cone structure of the machine clipping cutter block without milling is adopted. The oblique and milling cone are fixed by shear pins, and a cemented carbide blade is installed on the milling cone. The sealed flow guide unit is used for sealing and flow guidance, so as to realize the positioning and distance maintenance between the milling cone and the oblique guide to avoid wear.

Benefits of technology

It improves the success rate and qualification rate of window opening, reduces the frequency of drilling, reduces the construction cost and labor intensity, and realizes the reuse of milling cones, extends the service life of the equipment.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a mechanically-clamped cutter block milling-free whipstock milling cone structure and a sleeve windowing method, the milling cone structure comprises a whipstock, a milling cone and a positioning guide unit, the whipstock and the milling cone are fixed through a first shear pin, an upper slope is arranged in the whipstock, the milling cone moves along the upper slope, and the positioning guide unit comprises a positioning ring and a positioning groove; the positioning groove is formed in the upper slope, the positioning ring is arranged on the milling cone, a protruding block is arranged on the positioning ring, and the protruding block is matched with the positioning groove. The milling windowing unit is used for windowing operation, and in the setting process of the whipstock, the sealing and flow guiding unit plays a role in sealing and flow guiding. By adjusting the shape and the size of the blade, the angle and the size of the notch, the number of the distributed teeth and the like, a window with the proper size and shape can be formed, and the optimal cutting and windowing effect is achieved. The milling cone and the whipstock are positioned through the positioning guide unit, so that the milling cone and the whipstock keep a certain distance, and the whipstock is avoided to open a window during operation.
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