Efficient milling cone with guide tool

Abstract

The invention relates to an efficient milling cone with a guide tool. The efficient milling cone comprises a drill hinge type milling cone and a guide tool, wherein the drill hinge type milling cone consists of a spiral milling cone, a short drill collar, a milling cone body and a milling cone head. The efficient milling cone is characterized in that: the guide tool is composed of an oblique iron part and an oblique iron head part which are fixedly connected; the oblique iron head is sleeved outside the milling cone head and connected with the milling cone head through a suspension stop block and a shear bolt; a soft cushion block is embedded on the oblique iron through a bolt; a sand blocking rubber cylinder is sleeved on the lower part of the oblique iron; a ball seat for the setting of a circulation hole and a steel ball are arranged in the milling cone head; and the ball seat is fixed in the milling cone head through a shear pin. The efficient milling cone with the guide tool has the advantages that: safety of the drilling process is remarkably improved; the safety, casing milling and easy recovery of the oblique iron are guaranteed by the oblique iron head, the soft cushion block and the sand blocking rubber cylinder; and the operations of positioning, seat hanging, windowing, window repairing and drilling can be finished at a time by use of a measurement tool while drilling so as to improve the operation efficiency and safety of windowing side drilling.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas drilling, in particular to a high-efficiency milling cone with a guiding tool. Background technique [0002] With the large-scale development of oil and gas fields, a large number of new or old wells need sidetracking to increase production, especially the branch well technology that has emerged in recent years is a drilling developed after directional wells, sidetracking wells, and horizontal wells. New technology, this technology drills several branch wells in one wellbore to increase the drainage area, improve the production of oil wells and reduce the cost of reservoir development. [0003] At present, there are many kinds of drilling methods for multilateral wells, including casing window forging and milling sidetracking, preset window, open hole sidetracking, expansion tube positioning sidetracking and intelligent multilateral wells, etc. The window sidetracking tool commonly us...

AI Technical Summary

Problems solved by technology

The tools for anchoring, window opening, window repairing, and drilling in one trip are still in the initial stage of development. The window opening tool and the guiding tool are connected by a pin, which may cause early shearing due to obstruction in the well. The guiding slope is a flat structure , the stability of the window opening operation is poor, and the guide tool cannot be recovered to block the space below, which has poor safety, unstable performance, and low efficiency. Because of the top structure of the window opening tool, the milling efficiency at the dead point is very low

[0004] Imported window sidetracking tools are expensive, and the inclined iron and the milling cone are connected by shear pins. The milling cone and the inclined iron are connected with thinner shear pins. fell into a well

Using thick shear pins to connect the milling cone and the inclined iron requires a large shearing force when separating, and there is a phenomenon that the inclined iron is not easy to recover

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