Air operated elevators are conventional elevators to which power actuation has been added.
This feature permits remote opening and closing of the elevators. It can meet normal working requirements in oil drilling & workover operation and also reduce workload.
The elevators are designed and manufactured according to the requirements API Spec 8C for drilling and production hoisting equipment.
Hydraulic Center Latch Elevator Type DDZH
| Model | Pipe Size with taper shoulder (inch) |
Casing (inch) |
Drill Collar (inch) |
Tubing (inch) | Rated Cap. (tons) |
| DDZH-250 | 2.3/8 – 5 | 4.1/2-5 | 3.1/8-5.1/4 | 2.3/8-4.1/2 | 250 |
| DDZH-350 | 2.3/8-6.5/8 | 4.1/2-7 | 3.1/8-6.3/4 | 2.3/8-5.1/2 | 350 |
| DDZH-500 | 2.3/8-6.5/8 | 4.1/2-7 | 3.1/2-6.3/4 | / | 500 |
Hydraulic Side Door Elevator Type CDZH
| Model | Pipe Size with taper shoulder (inch) |
Casing (inch) |
Drill Collar (inch) |
Tubing (inch) | Rated Cap. (tons) |
| CDZH-350 | / | 9.5/8-20 | / | / | 350 |
| CDZH-500 | 3.1/2-6.5/8 | 4.1/2-9.5/8 | 4.3/4-9.3/4 | 2.3/8-4.1/2 | 500 |
