ARRANGEMENT FOR INSTALLING A CEMENT BRIDGE THROUGH A WHINKLE WEDGE

Abstract

The invention relates to the field of drilling equipment used in the reconstruction and drilling of oil and gas wells, in particular to means for installing cement plugs and activating a deflection wedge when sidetracking to increase oil production at old fields. An assembly is proposed for installing a cement bridge through a whipstock, including a drop-down cementing block and an assembly lowered into the well, consisting of a milling cutter and a whipstock, wherein the drop-down cementing block is made in the form of a branch pipe with an external bevel in the lower part, the branch pipe has a rubber casing on which two radial rows of petals are made for cleaning the inner surface of the drill string from cement residues, in the lower part of the branch pipe, made with an internal bevel, a hydraulic nozzle is installed, in the middle part of the branch pipe body through radial circulation holes are made, above which a rupture disk is installed in the cavity of the branch pipe,in the upper part of the milling cutter-reamer there is a shear seat, fixedly secured with shear bolts, designed for the seating of the discharged cementing block, from the outer surface of the milling cutter-reamer a small diameter pipe is branched off for supplying the buffer liquid to the anchor, from the lower part of the milling cutter-reamer a larger diameter pipe is branched off, forming a channel for supplying cement to the wedge-deflector,

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