钻探
位(键)
穿透率
演习
穿透深度
钻头
扭矩
计算机科学
切断
流离失所(心理学)
井控
工程类
机械工程
电气工程
电压
物理
光学
心理治疗师
热力学
计算机安全
心理学
作者
Andrey Rebrikov,Anton Koschenkov,Artem Nelaev,Maxim Trefilov
摘要
Abstract In the current exploration and production practices, drilling is entering a new stage of development in which one of the top priorities is the reduction of well construction time with new technologies and innovations. A key component of this effort is the use of the latest achievements in the design and manufacturing of drill bits. To efficiently drill complex well profiles with a bottomhole assembly (BHA), including a downhole positive displacement motor (PDM) and polycrystalline diamond compact (PDC) bits, special attention is paid to controlling and orientating the bit by using the cutters depth of cut control limitations. The bit depth of cut is a quantity that characterizes the bit axial displacement per one revolution and depends on the bit rotation speed and rate of penetration (ROP). The control of the depth of cut enables the adjustment of the reactive bit torque, depending on the weight on the bit (WOB) as a result of the use of different static fixed depth of cut control (DOCC) elements, which have their own disadvantages and limitations. The rolling depth of cut control (RDOCC) element is an innovation that was used to reduce excessive depth of cut by PDC cutters while drilling medium, hard, and interbedded rock. This technology has enabled PDC bits to achieve the best footage and ROP results because it provides smooth drilling and improved bit steerability. Field trials of this technology have shown its high efficiency in interbedded heterogeneous rock drilling of different well profiles, as compared to conventional depth of cut control static elements. The first field trial in Russia proved the effectiveness of RDOCC element technology. The RDOCC innovation helps oil companies to achieve new results and improve drilling performance; the ROP and footage drilled on the bit improved. In some fields, it became possible to drill the entire section interval with one run, whereas two or three PDC bits were typically used previously. This paper describes the benefits of using the new drill bits with the RDOCC elements in challenging drilling applications with complex geological conditions.
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