Self-propelled rotary jet multi-hole nozzle

Abstract

The invention relates to a self-feeding rotary jet flow multi-hole spray nozzle, which comprises a spray nozzle cap, a back end shaft, a screw and the like. The self-feeding rotary jet flow multi-hole spray nozzle has the basic work principle that a plurality of forward holes are uniformly formed in a certain circle, leaving away from the center for a certain distance, of the front end surface of the spray nozzle, a plurality of center axes of the holes are in the located plane of a certain tangent line of the circle and are distributed in a way of forming different angles with an axial line of the spray nozzle cap, and the projection of the axial lines of the holes in the front end surface is a tangent line of the same circle, so the jet flow has high tangential speed, and the efficient rock breaking is favorably realized; the jet flow dispersion is realized, the acting range is wide, and large-aperture holes are favorably formed; the spray nozzle cap realizes autorotation through the jet flow reaction, each hole is scanned along the self rail for completing the rock breaking, and the formed holes are more regular; the spray nozzle cap realizes the autorotation, and the self feeding of the spray nozzle is favorably realized. The backward spray nozzle provides the self-feeding force, and meanwhile, the autorotation of the spray nozzle cap can be controlled. The self-feeding rotary jet flow multi-hole spray nozzle has the advantages that the structure is simple, the efficient rock breaking can be realized, and large-diameter regular holes are formed.

Description

technical field [0001] The invention relates to the field of oil exploitation, and is a core component of the ultra-short-radius radial horizontal well technology of the new drilling technology, that is, a novel self-propelled rotary jet multi-hole nozzle. The invention can realize high-efficiency rock breaking while providing self-propelling force, and form relatively regular and large-diameter holes. Background technique [0002] Ultra-short radius sidetracking horizontal well drilling technology (also known as radial horizontal well drilling technology) refers to drilling one or more horizontal wellbores radially distributed in a vertical wellbore. This technology is a new oil field stimulation technology developed in recent decades. Utilizing this technology can revive dead wells, greatly increase oil well production and crude oil recovery, and can reduce drilling costs. It is an effective means for revitalizing old wells in oilfields, tapping reservoir potential, and s...

AI Technical Summary

Problems solved by technology

However, under the condition of confining pressure, the jet attenuates quickly; the hole formed by it has a small diameter and irregular shape; the recoil force of the forward jet is relatively large, which is not conducive to forward drilling

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