1) backreaming
倒划井眼
2) backreaming
倒划眼
1.
Design of a new underreamer with backreaming and gauge protection.;
具有倒划眼和保径功能的新型扩孔器设计
3) keyseat wiper
井下划眼器
4) drill upward
从下而上划井眼
6) wellbore
井眼
1.
The currently used methods for calculating gas injection rate during gas drilling all take the temperature of natural formation at the same depth as the temperature of the annulus fluid,without considering the heat exchange occurred between the wellbore fluid and the formation.
目前关于气体钻井时所需注气量的计算方法均是将环空流体的温度取同一深度的自然地层温度来进行计算,没有考虑井眼内流体与地层进行换热的影响,这必然会带来误差。
补充资料：枪划
枪划 在漆器表面用针或刀尖镂划细线花纹的技法。
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