CAJ | 학술논문

为解决贯通式潜孔锤反循环连续取心(样)技术在钻进“硬、脆、碎”等复杂地层时反循环排不出渣或者排渣不彻底的现象,在现有贯通式潜孔锤反循环连续取心钻头结构的基础上,优化设计一种新型内喷孔式反循环钻头,能在孔底形成强有力的多股引射抽吸流场,并模拟分析了内喷孔轴线水平偏角和内喷孔轴线与钻头中心的偏距2个结构参数对新型反循环钻头结构抽吸能力的影响.通过模拟分析的验证,此种反循环钻头的结构更加简单,反循环效果比较优良.
위해결관통식잠공추반순배련속취심(양)기술재찬진“경、취、쇄”등복잡지층시반순배배불출사혹자배사불철저적현상,재현유관통식잠공추반순배련속취심찬두결구적기출상,우화설계일충신형내분공식반순배찬두,능재공저형성강유력적다고인사추흡류장,병모의분석료내분공축선수평편각화내분공축선여찬두중심적편거2개결구삼수대신형반순배찬두결구추흡능력적영향.통과모의분석적험증,차충반순배찬두적결구경가간단,반순배효과비교우량.
With hollow-through DTH hammer reverse circulation continuous coring (sample) technology, slagging or half-way slagging while drilling in the “hard, brittle, broken” complex formations are often encountered; to solve these prob-lems, a new type of internal jet orifice reverse circulation bit was optimally designed on the basis of the existing hollow-through DTH hammer RC bit, which can form the powerful multilevel injection-suction fluid field.The article also imitates and analyzes the influence of 2 structural parameters of internal jet orifice level angle and the offset distance between inter-nal jet orifice axis & the bit midpoint to the suction capacity of new RC bit structure.The simulation analysis has verified that the structure of such a RC bit is simpler with good reverse circulation effect.