Model | Drill Pipe Size and Style | Diameter of Elevator Bores | Elevator Sign | Max. Load Tons(KN) |
DDZ67 | 23/8EU | 67 | 23/8EU | DDZ 150 (1350) 250 (2250) 350 (3150) 500(4500) DDZ TD 350 (3150) 500(4500) |
DDZ83 | 27/8EU | 83 | 27/8EU | |
DDZ101 | 31/2EU | 101 | 31/2EU | |
DDZ109 | 4IU | 109 | 4IU | |
DDZ121 | 4EU | 121 | 4EU | |
41/2IU | 41/2IU | |||
41/2IEU | 41/2IEU | |||
DDZ133 | 41/2EU | 133 | 41/2EU | |
5IEU | 5IEU | |||
DDZ148 | 51/2IEU | 148 | 51/2IEU | |
DDZ 159 | 5 7/8IEU | 159 | 5 7/8IEU | |
DDZ179 | 6 5/8IEU | 179 | 6 5/8IEU |
The design and fabrication conforms to API Spec 8A, API Spec 8C, SY/T5035 and other technical specifications, with a national
fabrication license.
The main pressure-enduring parts are made of high quality alloy steel.
Finite element analysis is adopted for strength checking and electrical logging for stress testing.
A two-time liquid quench process is used in the heat treatment technology.
Factory test and NDT are done stringently in accordance with the related standards.