为了进一步提高接头的密封能力，设计了一种斜面台肩结构来改善钻杆接头的密封性能，与api结构相比有效的提高了密封性能。
A structure of incline plane shoulder has been designed to improve the sealing performance of the joint and it improved the sealing ability effectively compared with the API joint.
为了进一步提高接头的密封能力，设计了一种斜面台肩结构来改善钻杆接头的密封性能，与api结构相比有效的提高了密封性能。
A structure of incline plane shoulder has been designed to improve the sealing performance of the joint and it improved the sealing ability effectively compared with the API joint.
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