... 内接头内部连接 internal connection 内螺纹接头 femaleadapter ; inner screw joint 双头内螺纹接头 double female adapter ...
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双头内螺纹接头 double female adapter
不锈钢异径内螺纹接头 Reducer socket
变径内螺纹接头 RI-ED
承口内螺纹接头 Adapter
变径内螺纹接头外螺纹 parker RI-ED
内外螺纹接头 BU
内外螺纹管接头 extension piece
内螺纹管接头 female union
内螺纹弯管接头 Female Elbow ; female cap elbow
虽然裂纹源很难避免，但如果能够阻止裂纹的扩展，也能够防止钻杆内螺纹接头纵向开裂失效。
Although it is hard to avoid the sources of fracture, the longitudinal fracture failure on the box joint can be prevented if proper measures are taken to prevent further extension of the fracture.
近年来由于深井、定向井等逐渐增多，油气井钻井中钻杆内螺纹接头纵向开裂失效成为常发事故。
Due to the increasing number of deep Wells and directional Wells being drilled, longitudinal fracture occurred on the box-ended drill pipe tool joint is often reported.
应用钻杆失效评估技术研究表明，横向材料冲击功大于80J将避免钻杆内螺纹接头纵向脆性开裂失效。
The drill pipe failure assessment demonstrates the longitudinal brittle fracture will be avoided when the transverse impact power of the material is over 80J.
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