A pneumatic operating device is installed on the existing elevator to realize automatic operation of the elevator. This pneumatic operation device can easily open or close the elevator, meet the needs of drilling and workover operations, and solve the problem of high labor intensity in oilfield workers' starting and drilling operations. The products are designed and manufactured according to the requirements of API Spec 8C "Drilling and Oil Extraction Equipment".
| Model |
Applicable diameter of tubulars ( in ) |
Rated Capacity(short tons) |
| DD-150 |
4.1/8-8.5/8 |
150 |
| DDZ-500 |
3.1/2-6.5/8 |
500 |
