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.
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.
应用推荐