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- roller bit cutting 牙轮钻头钻进
- It is summarized and analyzed the strength characteristic of andesite and the principium of destroying rock of roller bit,take andesite for example. 以安山岩为例,总结和分析了安山岩的强度特性以及组合牙轮钻头的破岩机理。
- To overcome the shortcoming of force test device of previous PDC bit single tooth, the force simulation test device of PDC bit cutting teeth is designed. 针对原有PDC钻头单齿受力实验装置的不足,研究设计了PDC钻头切削齿受力模拟实验装置。设计的实验装置可以模拟PDC钻头三齿组合状态下的切削齿受力;
- The operating performance quality of the roller bit, which is the most main broken crag tool, directly influence the well drilling quality, well drilling efficiency and well drilling cost. 牙轮钻头是钻井工程中最主要的破岩工具，其工作性能的好坏直接影响钻井质量、钻井效率和钻井成本。
- Study of Single Spherical Roller Bit 单牙轮钻头研究
- STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT 牙轮钻头碟形圈密封的试验研究
- Pack up screen, whole room is connected roomily fully, won't have the feeling that a bit cuts off. 收起屏风，整个房间宽敞通透，不会有丝毫阻隔之感。
- Keywords drillability;logging data;roller bit; 可钻性;测井资料;牙轮钻头;
- He bit off a large piece of the apple. 他咬下一大块苹果。
- She was a bit queer after her husband deserted her. 她遭丈夫遗弃後精神有点失常。
- Keywords PDC bit;bit design;lithology;multi interbedded;roller bit;cutting structure;hydraulic structure; PDC钻头;钻头设计;岩性特点;多夹层;牙轮钻头;切削结构;水力结构;
- I reckon the girl is a little bit boyish. 这想这个女孩有点男孩子气。
- Sealing mechanism of metal face seals for roller bit 牙轮钻头单金属浮动密封结构的密封机理
- The ride on the roller coaster dizzied us. 乘坐云霄飞车使我们头晕。
- The seedling have shrivel up a bit in the hot sun. 在炎热的太阳光下，幼苗已有一点乾枯。
- May I borrow your roller skates? 我可以借你的旱冰鞋吗？
- A bit of embrocation will soothe your bruised knee. 用一点搽剂可使你那青肿的膝部消肿。
- Study on Roller Bit Rock-Breaking Power in Vertical Wells 直井牙轮钻头碎岩功率研究
- Clattering along on roller skates. 踩着轮式溜冰鞋行进
- The love scenes in the play were a bit overdone. 剧中的情爱场面演得有点过火了。
