CHINA SCOTON OILFIELD EQUIPMENT CO., LTD.

Top Drive Saver Sub is a kind of sub connected with Lower IBOP and drill pipe, mainly used in the top drive system. Not only acting as crossover sub, but also protecting lower IBOP. Top drive saver sub can be divided into general top drive saver sub and low temperature top drive saver sub.

Specification of Top Drive Saver Sub

Model

OD

mm(inch)

ID

mm(inch)

Conn.

DQA187B

187(7 23/64)

57.2(2 1/4)

6 5/8REG×NC46

DQA187A

187(7 23/64)

71.4(2 13/16)

6 5/8REG×NC50

DQA197B

197(7 3/4)

57.2(2 1/4)

6 5/8REG×NC46

DQA197A

197(7 3/4)

71.4(2 13/16)

6 5/8REG×NC50

DQA219A

219(8 5/8)

71.4(2 13/16)

7 5/8REG×NC50

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