Specifications
Cross-over Sub:1.API standard
2.Material: AISI 4145H chromium-molybdenum steel
Cross-over Sub
- API standard
- Material: AISI 4145H chromium-molybdenum steel
- Cross-over sub serves to conversion and connection . It is the basic component in downhole work.
- It is divided into drill string crossover and tubing Crossover.
- Drill string Cross-over is divided into type A, type B and type C.
Denotation | Top junction block | Lower junction block | Type | |
Kelly joint | Kelly | Drill pipe joint | AB Type A or B | |
Drill pipe joint | Drill pipe joint | Drill pipe joint | AB Type A or B | |
Crossover joint | Kelly | Drill collar | AB Type A or B | |
Drill collar joint | Drill collar | Drill collar | AB Type A or B | |
Bit joint | Drill collar | Bit | AB Type A or B | |
Swivel joint | Swivel lower joint | Kelly | C Type C | |
Fish joint | Kelly | Drill pipe joint | C Type C | |
Drill pipe joint | Fishing tool | C Type |
