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.
|
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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