Wireless auto-orientation hydraulic integrated type sidetrack drilling tool

Abstract

The invention provides a wireless auto-orientation hydraulic integrated type sidetrack drilling tool. The wireless auto-orientation hydraulic integrated type sidetrack drilling tool comprises a hollowtaper mill, deflection guide unit tapered iron and a seat seal anchoring device; the seat seal anchoring device comprises a cylinder jacket, an upper conical body, a lower conical body and a limitingpipe, wherein the upper conical body and the lower conical body are arranged inside the cylinder jacket; the limiting pipe is used for connecting the upper conical body and the lower conical body; the lower end of an inner hole of the lower conical body is provided with a seat seal clamping edge; the part, positioned between the limiting pipe and the seat seal clamping edge, of the inside of thelower conical body is provided with a valve core and a pressure spring; the upper end of the valve core is in clearance fit with the inner hole of the lower conical body; the lower end of the valve core forms a flow clearance with the seat seal clamping edge under the effect of the pressure spring; and when the output of drilling fluid is equal to or higher than a preset value, the pressure springis compressed and the valve core is pressed on the seat seal clamping edge so that the flow clearance is sealed. The sidetrack drilling tool can realize circulation of the drilling fluid so as to adopt a wireless logging instrument for orientation, can realize pressure-maintaining seat sealing after orientation, is reliable in work, simplifies the orientation operation and shortens the orientation time.

Description

technical field [0001] The invention belongs to workover tools, in particular to a wireless self-orientation hydraulic integrated window sidetracking tool. Background technique [0002] Sidetracking tools include deflectors and milling cones for sidetracking in wells. The deflector and milling cone of the traditional sidetracking tool are two independent tools, while the integrated sidetracking tool is to replace the feeder installed on the inclined iron of the traditional deflector with a Milling cone for window milling operations, that is, a window sidetracking tool that combines a deflector and a milling cone. [0003] Since most sidetracking wells require orientation, and for sidetracking wells that require orientation, the integrated window sidetracking tool must install a positioning joint on the milling cone before going downhole, and use the positioning joint and gyroscope to determine the deflector The orientation of the inclined iron slope in the well. The posit...

AI Technical Summary

Problems solved by technology

[0007] At present, there are two kinds of hydraulic fixed windowing sidetracking tools commonly used at home and abroad: one adopts a preset setting ball structure, and this kind of windowing sidetracking tool cannot circulate drilling fluid, such as the above-mentioned self-orienting integrated windowing The sidetracking tool, because the tool starts setting once the drilling fluid is circulated, it cannot be oriented by the wireless logging system; the other is a windowed sidetracking tool with a rear-throwing setting ball, which can circulate the drilling fluid but must be put into setting Only balls can be set, such as the one-piece window sidetracking tool disclosed by the publication number CN102364029B. If a wireless logging instrument is placed in the drilling tool for this tool, the setting ball cannot be put in place, resulting in failure to achieve setting.

Because of the structural problems of the existing hydraulic fixed window sidetracking tools, the application of wireless logging tools in the orientation of hydraulic window sidetracking tools is limited

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