タイプ
Coupling for sucker rod, polished rod
機械タイプ
Petroleum Machinery
Specifications
API 2-3/8" to 20"
Thread Types
EUE, NUE, STC, LTC, BTC, Premium thread
Color
green, white, red and etc.
Application
for connecting drilling pipes, casing and tubing
Steel Grade
K55, J55, L80, N80, P110