Spin type-magnetic driving downhole cuttings bed clearing tool

Abstract

The invention relates to a spin type-magnetic driving downhole cuttings bed clearing tool. The spin type-magnetic driving downhole cuttings bed clearing tool comprises a cutting device composed of cutting teeth, a cutting cylinder and long strip permanent magnets, and the cutting device is fixed to the outside of a drilling rod through a deep groove ball bearing; and a power device is composed offixing seats, a fixing cylinder, a turbine component, a rotating cylinder and long strip permanent magnets, the rotating cylinder is fixed into the drilling rod through a deep groove ball bearing, andthe fixing seats are fixed into the drilling rod in an inlaid mode. Driving is conducted through the magnets, the power device rotates through a turbine device, and the problem of leakage of well drilling fluid in the drilling process due to drilling on the drilling rod in the prior art is solved; the problem of corrosion failure of parts due to mechanical connection in the prior art is solved; and the problem that in the prior art, the clearing tool cannot operate when a drilling rod slides forward is solved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling for oil and natural gas development, and in particular relates to a spin-magnetic drive downhole cuttings bed removal tool. Background technique [0002] At present, wells with complex structures such as highly deviated wells, horizontal wells, and extended-reach wells are often used in the exploitation of offshore oil, natural gas, and shale gas to increase the oil drainage area of ​​the wellbore and maximize the production of a single well. In well sections with inclination greater than 45°, due to gravity, the drilling tool leans against the lower well wall in these well sections, and the entire drill pipe forms an "eccentric annulus" in the annulus. As a result, there is a large gap in the settlement and migration of cuttings compared with vertical wells and small displacement directional wells, and cuttings tend to settle to the lower side. Due to the "eccentric annulus", the fl...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of the prior art, the object of the present invention is to provide a spin-magnetic drive downhole cuttings bed removal tool, which overcomes the need for cleaning when the drill pipe does not rotate in the sliding drilling configuration existing in the prior art. The problem that the tool does not run; also overcomes the problem of drilling fluid leakage that exists between the cuttings bed removal tool and the drill pipe in the prior art due to the mechanical connection

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