kelly bar sub
... kelly hole 放方钻杆洞 kelly joint 方钻杆接头 kelly packer 方钻杆防喷封隔器 ...
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... kelly above rotary 方余 kelly bar sub 方钻杆接头 kelly bar 方钻杆 ...
基于92个网页-相关网页
方钻杆转换接头 Kelly joint
方钻杆保护接头 kelly-saver sub
·2,447,543篇论文数据，部分数据来源于NoteExpress
使用AISI 4145 H合金钢制造。方钻杆的末端和驱动截面和接头都符合API规范。
Kellies are made of AISI4145H alloy steel. The ends, driving sections and joints are produced and tested according to API specification.
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