岩土钻掘毕业论文--钻孔工程设计及孔斜控制

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1、成都理工大学 2013 届本科毕业设计 湖南某金矿 ZK0202钻孔工程设计及孔斜控制 作者姓名：谭相东 专业班级 ： 2009030405 指导教师：李山 摘要 湖南某金矿 ZK0202钻孔， 位于湖南省岳阳市平江县长寿镇黄金洞乡杨山庄，地处山区，区内构造变形强烈，褶皱、韧性剪切带、断层、劈理、面理广泛发育，构成了本区复杂的构造格局。 在这样的地质条件下进行钻孔施工，需要进行严格的工程设计。 采用金刚石绳索取芯钻进方法。 首先在钻孔结构设计方面采用三级孔身结构 ，采用 91mm的钻头开孔至 6m，下入 89mm 孔口管； 中间孔段用直径为 75mm 的钻头 钻进至 152m，下入 73mm

2、套管； 终孔 段 用 59mm 的钻头 钻进至终孔 。 选择地质系统液压立轴式岩心钻机 XY-5 型岩心钻机、国内往复式泥浆泵BW-250 型、直径为 5cm 的供水管、钻机动力用 Y250M-4 电动机、取芯设备电动机采用 Y132S-4 型、 选择 功率 大于 190kw 的发电机组 、采用 S59 型绳索取芯钻具、钻塔选择 SG18，附属设备包括小口径金刚石钻进用水龙头、普通提引器、JW-1 型泥 浆搅拌机、木马夹持器。管材使用金刚石绳索取芯专用管材。 选择金刚石绳索取芯双管钻头。 59mm 孔段钻压控制在 4.5 8.5KN、转速控制在 600 1200KN、冲洗液泵量控制在 30 4

3、5L/min。 75mm 孔段钻压控制在 6 10KN、转速控制在 400850KN、冲洗液泵量控制在 40 60L/min。 91mm 孔段钻压控制在 8 15KN、转速控制在 350 700KN、冲洗液泵量控制在 50 70L/min。 泥浆采用泡沫泥浆配方为：高阳土 4 5%； Na2CO3 7%； CMC 0.2 0.3%； PHP 200 300ppm； DF-1发泡剂 150 200ppm。 为了解决钻孔偏斜严重的问题，对造成孔斜的原因进行分析，采取必要的防斜手段。首先设备安装及开孔质量必须做好。再者在钻遇强造斜孔段采用下限钻压及转速，即 75mm 孔段采用钻压 6KN、转速 35

4、5r/min， 59mm 孔段采用钻压4.5KN、转速 577 r/min。最后 在钻具的组合上采用满眼钻具防斜，合理的连接扶正器， 75mm 孔段上扶正器至钻头的距离为 9.37m；中扶正器至钻头的距离为 3.7m。下扶正器距钻头 1m； 59mm 孔段上扶正器至钻头的距离为 7.72m；中扶正器 至钻头的距离为 3.09m。下扶正器距钻头 1m。 关键词： 钻孔工程设计 孔斜控制 满眼钻具 扶正器 成都理工大学 2013 届本科毕业设计 The design and hole deviation control for the ZK0202 drilling engineering in

5、the gold mine in Hunan Abstract:ZK0202 drilling of a gold mine, located in Huangjindong,Changshou, Pinjiang,Yueyang City, Hunan Province ofChina.It is in the mountains with strong regional tectonic deformation, folds, ductile shear zones, faults, cleavage, foliation widely developed, this area const

6、itutes a complex tectonic pattern,using of diamond coring drilling method. Drilling in such a geological conditions, needs a strict engineering design.First design 3 level structure in terms of drilling structure.Drill hole with 91mmdiamond bit to 6m,Install 89mm orifice pipe,Intermediate hole secti

7、on with a diameter of 75mm diamond bit drilling to 152m and run casing 73mm.Finally use 59mm bit drill to the end. ChooseXY-5 Core drilling equipment of geological system Hydraulic vertical shaft type Core Drill,BW-250 Mud Pump, a diameter of5cm water pipe,Y250M-4 motor,Coring equipment motor type u

8、se Y132S-4,Choose generator sets with power greater than 190kw,Using the type of S59 wireline coring drill,Choose SG18 rig,Ancillary equipment including small-diameter diamond drilling taps, general mention inducer, JW-1-type slurry mixer, Trojan holder, using a diamond wireline coring pipe special

9、pipe. The 59mm hole section drilling pressure controlled,4.5 8.5KN and Speed control 600 1200KN and Mud volume control in 30 45 L / min.75mm bore section drilling pressure control at 6 10KN, speed control at 400 850KN, mud pump volume control in 40 60 L / min.91mm bore section drilling pressure cont

10、rol at 8 15KN, speed control at 350 700KN, wash pump volume control in 50 70L/min.Foam mud formula is: High-positive soil 4 5%； Na_2 CO_3 7%； CMC 0.2 0.3%； PHP 200 300ppm； DF-1 foaming agent 150 200ppm. In order to solve the serious problems of drilling skew,analyze the causes and take the necessary

11、 anti-deflection means.First, the quality of equipment installation and openings must do better.When drilled to strong whipstock formationsuse lower WOB and RPM.That 75mm hole section adopts WOB 6KN, speed 355r/min,59mm hole section use WOB 4.5KN, speed of 577 r / min.Finally, a combination of packe

12、d hole assembly on the use of anti-deflection l, reasonable connection centralizer.The75mm hole section, the upper centralizer have a distance of 9.37m to bit.Intermediate centralizer to bit distance of 3.7 m.Bottom centralizer spacing drill 1 m. The59mm hole section, the upper centralizer have a distance of 7.72m to bit.Intermediate centralizer to bit distance is of 3.09m,bottom centralizer spacing drill 1 m. Key words: Drilling engineering design Hole inclination control packed hole assembly centering guide