桥古1井快速钻进PDC钻头优化设计与效果分析  

Design Optimization and Effect Analysis of Fast Drilling PDC Bit for Well QG-1

作　　者：张建平 

机构地区：[1]武汉亿斯达工具有限公司,湖北武汉430205

出　　处：《石油钻探技术》2012年第6期119-123,共5页Petroleum Drilling Techniques

摘　　要：为了提高桥古1井山前构造地层中的钻进速度,对拟用于该井的PDC钻头进行了优化设计。在详细分析该井的地层特点以及邻近区块相似层位井段钻头使用资料的基础上,提出了针对性的优化方案,采用了力平衡布齿设计、等切削轮廓、CFD优化水力结构等现代PDC钻头设计技术,对常规PDC钻头在山前构造中易磨损、易泥包、机械钻速慢等缺陷进行了设计改进。所设计的钻头在桥古1井共使用了2只,使用井段为2 075.12～4 959.00m,总进尺2 883.88m,纯钻时间519.2h,平均钻速5.55m/h,比设计预期的3.50m/h提高了58.57%,比预计的工期缩短了30d。桥古1井的钻井实践表明,提出的钻头选型和优化设计方案可行,同时为山前构造地层优快钻井积累了宝贵经验。In order to improve the drilling speed of Well QG-1 in the piedmont structural lormatlon, the design of PDC bits was optimized. Based on careful analysis of the formation characteristics and bit data of similar layers in adjacent blocks, pertinent optimization scheme was put forward, which used modern PDC bit design methods such as force balance of cutters arrangement design, equal cutting profile, and CFD optimization of hydraulic structure,Defects of conventional PDC bit in piedmont structure such as easy ab- rasion, easy balling, slow drilling speed were modified. Two such designed bits altogether were used in Well QCr-1,to drill from 2 075.12 m to 4 959.00 m. With a total footage of 2 883.88 re,the net drilling time of 519.2 h,the average drilling speed was 5.55 m/h,which is 58.57% faster than the expected design of 3.50 m/h,resulting in a reduction of drilling time of 30 d. Drilling in Well QG-1 showed the methods of bit selection and design optimization were feasible, at the same time precious experience for piedmont formation drilling was accumulated.

关 键 词：PDC钻头 山前构造 钻头设计 水力参数设计 切削结构 桥古1井 

分 类 号：TE921.1[石油与天然气工程—石油机械设备]