1) bicenter bit

双中心钻头
2) bicenter bit

双心钻头
1.
When drilling with bicenter bits, several problems have been encountered, such as drilling a smaller- than - expected hole, the instability of bottom hole assembly (BHA), and hole deviation tendencies that make the bit extremely weight sensitive.
针对使用双心钻头钻进时扩孔尺寸不理想、钻具工作不稳定、井斜趋势引起钻头工况对钻压非常敏感等问题,对底部钻具组合的受力、变形和运动状态等方面进行了分析研究表明,由于双心钻头几何设计的独特性,工作时钻头上受有不平衡力,这使得钻头切削不稳定,且影响钻柱变形。
3) center bit

中心钻头
4) plug centre bit

插头中心钻
5) centre-jet drill bit

中心喷射式钻头
6) concave inward bit

中心凹陷形钻头
补充资料:2,2-双氯甲基-三亚甲基-双[双(2-氯乙基)磷酸脂]
CAS:38051-10-4
分子式:C13H24Cl6O8P2
中文名称:2,2-双氯甲基-三亚甲基-双[双(2-氯乙基)磷酸脂]
英文名称:2,2- bis(chloromethyl)-trimethylene bis[bis(2-chloroethyl)phosphate]
phosphoric acid, 2,2-bis(chloromethyl)-1,3-propanediyl tetrakis(2-chloroethyl)
2,2-bis(chloromethyl)trimethylene bis(bis(2-chloroethyl)phosphate)
2,2-bis(chloromethyl)-1,3-propanediyltetrakis(2-chloroethyl)phosphate
分子式:C13H24Cl6O8P2
中文名称:2,2-双氯甲基-三亚甲基-双[双(2-氯乙基)磷酸脂]
英文名称:2,2- bis(chloromethyl)-trimethylene bis[bis(2-chloroethyl)phosphate]
phosphoric acid, 2,2-bis(chloromethyl)-1,3-propanediyl tetrakis(2-chloroethyl)
2,2-bis(chloromethyl)trimethylene bis(bis(2-chloroethyl)phosphate)
2,2-bis(chloromethyl)-1,3-propanediyltetrakis(2-chloroethyl)phosphate
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条