Integrated drilling tool for crushing and cleaning drilling borehole rock debris deposit bed

Abstract

The invention discloses an integrated drilling tool for crushing and cleaning a drilling borehole rock debris deposit bed, and relates to the field of drilling tools. A scraping and cleaning short joint is a columnar pipe body, more than one convex edge spiral wing is longitudinally arranged on the annular wall of the scraping and cleaning short joint, the convex edge spiral wings are longitudinally arranged in a V-shaped circumferential interval mode, hard alloy convex blocks are evenly distributed on the edge faces of the convex edge spiral wings, the two ends of each V-shaped convex edge spiral wing are connected with cutting edges which are sunken inwards and warped outwards, and columnar cutting teeth are arranged on the surfaces of the cutting edges; and a V-shaped sunken flow guidegroove is formed between every two adjacent V-shaped convex edge spiral wings, and liquid flow nozzles which communicate with the interior of a pipe are arranged at the two ends of each flow guide groove. The V-shaped sunken flow guide grooves rotate along with a drilling rod, so that drilling fluid generates severe turbulence, and sedimentation of rock debris particles in a well section is effectively prevented; and meanwhile, formed rock debris bed particles can be efficiently stirred, and the stirred rock debris particles are captured by the flow guide grooves, then brought into a suspension layer with a high annular flow rate and thrown to a high-side annulus and a farther distance.

Description

Technical field [0001] The invention relates to the field of drilling tools, in particular to an integrated drilling tool for crushing and cleaning the cuttings sedimentation bed of drilling wells. Background technique [0002] Wellbore cleaning technology is a key technology involved in horizontal wells, highly deviated wells, extended reach wells and other well types. During the construction and drilling of these well types, due to gravity, cuttings are easily The formation of cuttings deposits in the well section and the horizontal well section causes the instability of the borehole wall to cause various complex situations to occur, which in turn causes engineering problems such as extended drilling cycles, low drilling speeds, and increased drilling costs. [0003] At present, there are two main methods for cleaning the cuttings bed on site: hydraulic cleaning and mechanical bed breaking. Hydraulic cleaning is mainly to remove the cuttings bed by increasing the mud displacemen...

AI Technical Summary

Problems solved by technology

These two methods have their own limitations in the application process. Hydraulic cleaning is limited by factors such as surface pump equipment, material conditions, and formation pressure, while mechanical bed breaking is due to the long-slope section and horizontal section. Wellbore axes do not coincide, and pipe sticking often occurs, which fails to meet the requirements of well washing and rock removal

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