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Home : Technical
Resources : API Connections
- API connections used where conditions or design requirements
permit their use
- API connections employ the DUOLINE TECHNOLOGY manufactured corrosion barrier
ring (CBR), which has over 35 year history
- New and Used Tubing can both be lined
- Thread condition should meet API Standards
- Driftability of used tubing is critical
- End User selects used steel grade (EMI Color Code and/or hydrostatic
testing requirements)
- Packers and Accessories can also be lined
Sizes, Weights & Lengths Available in API connections
- 2-1/16" 3.25 # IJ 10rd
- 2-3/8" 4.7 # EUE 8rd & 4.6 # NU 10rd - 32.5’
max length
- 2-7/8" 6.5 # EUE 8rd & 6.4 # NU 10rd -32.5’ max
length
- 3-1/2" 9.3 # EUE 8rd & 9.2 # NU 10rd - 32.5’
max length
- 4-1/2" 12.75 EUE 8rd & 11.6 LTC*/STC* 8rd - 40.0’
max length
- 5-1/2" 17 # & 20 # LTC*/STC* 8rd, Buttress - 43.5’
max length
- 7" 23, 26, 29, 32 # LTC*/STC* 8rd, Buttress - 43.5’
max length
- *LTC & STC casing threads have
demonstrated limitations
For further information please use our General
Enquiry Form or for product selection please complete the DUOLINE Selection Form.
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