Testing Technical Borehole Drilling at Site # 738 in A Sandstone Uranium Mine

• 来源期刊: 探矿工程-岩土钻掘工程
• 学科: 地球科学
• 关键词: POB penetration rate bit selection bit enery pump pressure
• 年，卷（期）: 2001,（z1）
• 所属期刊栏目: 钻掘设备与器具
• 页码范围: 198-201
• 页数: 4页
• 分类号: P634
• 语种: 中文

摘要

Data on all drilled wells were analyzed for comparison of the effect of different bit types, weight on bit, and ro tary speeds on the penetration rate in the various formations and depth intervals. This was initiated in an attempt to im prove penetration rates and reduce per well drilling times. Based on this study, an optimum bit selection, bit weight and rotary speed program was incorporated into drilling plans for subsequent wells drilled in the area. Initiation of this study resulted in significant improvement in penetration rates, in spite of the fact that some adverse conditions existed, such as formations, which have been pressure depleted by production, and drilling of high angle holes.