2) far visual acuity
裸眼远视力
3) visible to the naked eye; clearly audible to the unaided ear.
裸眼视力;裸耳可以清楚的听见。
4) open hole
裸眼
1.
During drilling cementing plug in wells located on carbonate crack reservoirs in the Tahe Oilfield, it is very difficult to complete such operation without failure because of irregular open hole diameter, extensively fractured formation, measured depth error, etc.
塔河油田碳酸盐缝洞型油藏在打水泥塞施工中,由于裸眼段井径不规则、地层缝洞发育、井深计量误差等因素影响,打水泥塞施工一次成功率很低。
2.
For increasing ROP and shortening Drilling cycle, partial exploration and development companies have been adopting three-stage casing schematics for long open holes in Tahe Oilfield since 2001, and have achieved good application effects.
为提高钻井速度,缩短钻井周期,自2001年起,塔河油田部分勘探开发井采取了长裸眼的三级井身结构,并取得了良好的应用效果。
3.
The DH4-8 well, located at Donghetang Oilfield in Tarim Basin, Xinjiang, is a directional production well with the deepest open hole sidetrack point and the longest open hole section.
位于新疆塔里木东河塘油田的 DH4- 8井是目前国内裸眼侧钻点最深、裸眼井段最长的定向开发井。
补充资料：巴达尔氏视力计