1) regular drill collar spear
标准式钻铤打捞矛
2) slim-hole drill collar spear
小井眼钻铤打捞矛
3) bull dog spear
钻杆打捞矛
4) spear
[英][spɪə(r)] [美][spɪr]
打捞矛
1.
The fishing range of ordinary spears is only from one to three millimeters, so some trial fishing operations often need, which increases fishing time and cost.
由于普通打捞矛只有1-3 mm的打捞范围,对于内径不确定的非常规落鱼,打捞作业中经常出现多次起下钻的试打捞作业现象。
5) spearhead
[英]['spɪəhed] [美]['spɪr'hɛd]
打捞矛头
6) anchor washpipe spear
固定冲管式打捞矛
补充资料：矛槊
矛槊 兵器名。矛长丈八，曰槊。故名。
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