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wob WOB =washed overboard 浪擊落水(指...

woback

The hydrodynamic propulsor takes drill fluid as power source , with the aid of the axial load produced by the pressure drop of the bit nozzle , makes the axial force act on the bit to produce wob , making up for the insufficient wob , ensuring the bit feeding smoothly and improving the penetration rate 這種推進器以鉆井液為動力源,借助鉆頭噴嘴壓降產生的軸向載荷,使軸向力直接作用于鉆頭產生鉆壓,彌補有效鉆壓不足,保證鉆頭平穩鉆進,提高機械鉆速。

Application of downhole hydrodynamic propulsors solves the problem of exerting wob , and are helpful to enhancing penetration rate 井下液力推進器的應用在一定程度上解決了鉆壓的施加問題,有利于提高鉆進速度。

In drilling high angle deviated holes , friction is the main factor affecting the effective wob 在大斜度定向井鉆井過程中,摩擦阻力是影響有效鉆壓的主要因素。