钻杆母螺纹

套管螺纹

水眼

长度(mm)

NC38

5″偏梯扣BTC

57

500

5″长圆扣LTC

5″短圆扣STC

NC38

5″偏梯扣BTC

57

580

5-1/2″长圆扣LTC

5-1/2″短圆扣STC

NC50

7″偏梯扣BTC

71

600

7″长圆扣LTC

7″短圆扣STC

NC50

9-5/8″偏梯扣BTC

71

620

9-5/8″长圆扣LTC

9-5/8″短圆扣STC

NC50

10-3/4″偏梯扣BTC

71

670

10-3/4″长圆扣LTC

10-3/4″短圆扣STC

NC50

13-3/8″偏梯扣BTC

71

670

13-3/8″长圆扣LTC

13-3/8″短圆扣STC