赵固一矿区域煤层底板灰岩层多分支水平注浆井优快钻井技术 -凯发官网入口

第 5 2 卷 第 10 期2021 年 10 月safetv in coal minesv 〇 1.52 no. 10oct. 2021doi: 10. 1 3347/j.cnki.m kaq. 2021.10.019刘修刚，王毅，李鹏，等.赵固一矿区域煤层底板灰岩层多分支水平注浆井优快钻井技术 [ j j ].煤矿安全，2021,52(10): 106-110.liu xiugang, wang yi. li peng, et al. optimal and fast drilling technology for multi-branch horizontal 移动 码阅读 grouting well in (.oal seam floor limestone layer in zhaogu no. i mine「 .1 ]. safety in coal mines, 2021, 52(10): 106-110.赵固一矿区域煤层底板灰岩层多分支水平注浆井优快钻井技术刘修刚，王 毅 ，李 鹏 ，宋昱播 ( 中煤科工集团西安研究院有限公司，陕 西 西 安 710077)摘 要 ：以赵固一矿区域内多个煤层底板灰岩层的多分支水平注浆井实钻为研究对象，进行了 井身结构优化，降低环空压力损耗及钻具托压值，复合钻进速度提高约15%~25%，定向钻进速 度 提 高 约 20%~40%;进行了钻具组合优选，采用双扶稳斜钻具组合降低了复合钻进过程井斜与 方位漂移量，使得平均日进尺率提高了 41.67%;优选出含有减振托齿和复合保径及抗磨的5 刀 翼双排齿 p d c 钻头，复合钻进平均速度提高约50%,定向钻进平均速度提高约56.52%;基于传 统水基低固相钻井液，改变钻井液配方优化钻井液性能，使得滑动钻进速提高至原钻速的12倍。 关键词：煤层底板灰岩；多分支水平注浆井；井身结构优化；钻具组合优选；优快钻进技术 中图分类号： t d 4丨 文献标志码： b b 文章编号：1003-496 x x (2021) 10-0106-05optimal and fast drilling technology for multi-branch horizontal grouting well in coal seam floorlimestone layer in z h a o g u n o . 1 m i n eliu xiugang, wang yi, li peng, song yuho(china coal technolog) & engineering group xi'an research institute, xi an 710077, china)abstract: taking the actual drilling of multi-branch horizontal grouting wells in coal seam floor limestone layer of the zhaogu no. 1 mine area as the research object. the well structure is optimized to reduce annulus pressure loss and drilling tool holding pressure, the compound drilling speed is increased by approximately 15% to 25%, the directional drilling speed is increased by about 20% to 40%; the drilling tool assembly is optimized, the dual stabilization drilling tool assembly is adopted to reduce the deviation and azimuth drift of the composite drilling process, the average daily footage rate has increased by 41.67%; a five—blade double-row tooth pdg bits with damping brackets and composite gauge and anti-wear is selected, the average composite drilling speed is increased by about 50%, and the average directional drilling speed is increased by about 56.52%; based on the traditional water—based low—solid drilling fluid, the drilling fluid formula is changed to optimize the performance of the drilling ： fluid, so that the sliding drilling speed is increased to 12 times the original drilling speed.key words ： coal seam floor limestone; multi-branch horizontal grouting well; well structure optimization; drilling tool assembly optimization; optimal and fast drilling technology多分支水平注浆井钻进技术是煤矿地面区域水 ；害治理工程常用关键技术采用相关技术精准优 ：快按照预先设计的多分支井轨迹沿灰岩层内顺层钻 ：进 ，钻至分支孔完钻孔深或钻至达到漏失注浆标准 曰寸』方 可 进 行 起 钻 及 注 浆 作 业 然 而 ，沿煤层底板基金项目：丨 k |家承:点研发计划重点专项基金资助项f:i (2018 y fc0808202)灰岩层内实施多分支水平注浆井钻进过程中，存在 托压现象严重，尤其对于长水平井段托压极为严重、 环空压力损耗较大、复合钻进过程井斜及方位漂移现 象严重、钻头磨损程度严重、破碎岩屑上返困难、钻 井液泵憋泵工况频次较多等问题1 m m ,从而致使难以•106.