Stacked-disk stabilizer

Abstract

The invention discloses a stacked-disk stabilizer for preventing well deflection in rotary drilling. The stacked-disk stabilizer consists of threaded connecting parts, a stabilizer body, annular disks, arc-shaped plates, annular grooves, hollow spaces and through grooves, wherein the annular disks and the arc-shaped plates are welded together with the stabilizer body; the arc-shaped plates are positioned among the annular disks; longitudinal through grooves are formed in the annular disks; the central tracks of the through grooves are straight lines or straight oblique lines or spiral lines; the outer diameters of the arc-shaped plates are smaller than the outer diameters of the annular disks; the annular grooves are formed between the outer walls of the arc-shaped plates and the annular disks; the hollow spaces are formed among the annular disks; the threaded connecting parts are arranged at the upper and lower ends of the stabilizer body; and the total water flow section area of each through groove is larger than the overflow section area of the internal channel of the stabilizer. By adopting the stacked-disk stabilizer, a drilling fluid flow field on the stabilizer and the stress characteristic are optimized, the frictional resistance between the stabilizer and a well wall is reduced, the pressure drop of the stabilizer is controlled, and mud wrapping and jamming of drilling tools are prevented; and meanwhile, well deflection of a drilling well is prevented effectively.

Description

technical field [0001] The invention is a drilling tool used in anti-deviation drilling tool assemblies in drilling engineering, especially a stacked disc stabilizer capable of preventing well deviation during rotary drilling, and is suitable for geological core drilling, oil and gas drilling, Hydrological water well drilling, especially suitable for oil and gas drilling and hydrological water well drilling. Background technique [0002] Well deviation is a relatively common problem encountered in drilling work, which directly affects the quality of the drilling well and the drilling speed, and has not been well resolved. The anti-deflection of vertical wells is one of the key issues in drilling technology. In recent years, the continuously developed directional wells have stricter requirements on well deviation. [0003] In recent years, the better deflection prevention technologies applied in the field include: pendulum drilling tool deflection prevention, full hole drill...

AI Technical Summary

Problems solved by technology

However, helical stabilizers and straight-edge stabilizers are prone to mud inclusion and drill sticking, which will increase the rotation resistance, increase the risk of differential pressure sticking and drill tool failure

The roller centralizer has an internal rotary structure, which is relatively complicated and requires high technical requirements

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