Long nozzle alloy bit used for oilfield drilling

Abstract

A long nozzle alloy bit used for oilfield drilling mainly solves the problems that the hydraulic energy of jet flow from an existing common nozzle alloy bit is low when the jet flow arrives at a downhole, the hydraulic energy of a downhole fluid field is poor in distribution, the hydraulic rock breaking and clearing effects are poor, and the degree of washout on the alloy bit by the vortexes is high. The long nozzle alloy bit is characterized in that a nozzle A (2) is arranged in the quadrant I on a body (1); a nozzle B (3) is arranged in the quadrant II on the body (1); a nozzle C (4) is arranged in the quadrant III on the body (1); a nozzle D (5) is arranged in the quadrant IV on the body (1); the nozzle A (2) and the nozzle C (4) are 55 mm higher than the upper surface of the body (1); the nozzle B (3) and the nozzle D (5) are 35 mm higher than the upper surface of the body (1). The long nozzle ally bit used for oilfield drilling has the advantages that the hydraulic energy of the jet flow when the jet flow arrives at the downhole is increased, distribution of the hydraulic energy of the downhole flow field is improved, the effects of hydraulic rock breaking and clearing are enhanced, and washout on the alloy bit by the local vortexes is reduced.

Description

Technical field [0001] The invention relates to a drill bit used for oil field drilling, especially a long nozzle alloy drill bit for oil field drilling. Background technique [0002] In the field of oilfield drilling, the nozzle length of the ordinary nozzle alloy drill bit is the same. When drilling fluid is used to pass through the jet bit nozzle during drilling, the high-speed jet hydraulic rock breaks and clears the rock, which improves the mechanical drilling speed and cools the drill bit. The existing common nozzle alloy drill bits exist: after the common nozzle alloy drill bit is ejected from the nozzle, the drilling mud liquid-solid two-phase flow is eroded, the hydraulic jet is in the spray diffusion zone, the high pressure zone and the low pressure zone are not obvious, and there is repeated fragmentation at the drill bit. , Weaken the sweeping effect of the overflow on the bottom hole cuttings, the hydraulic effect is not fully exerted, the hydraulic energy is lost, a...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low hydraulic energy reaching the bottom of the well by the jet flow of the common nozzle alloy bit, poor distribution of hydraulic energy in the flow field at the bottom of the well, poor hydraulic rock breaking and rock cleaning, and high erosion of the alloy bit by the vortex

The invention provides a long nozzle alloy drill bit for oil field drilling

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