API 5CT tubing coupling for oilfield tubulars
API 5CT tubing couplings join tubing joints in production and injection strings. CNPS lists tubing couplings under the API 5CT standard with common oilfield grades and thread forms so buyers can match couplings to the tubing string already specified for the well.
Existing product notes call out OD 2 3/8, grades J55, K55, N80, L80-1, N80-Q, C90, and P110, with NU and EU thread options, all under API 5CT. Treat that list as the published starting range—not an exhaustive catalog. Confirm OD, grade, thread, and coating or material extras for your string before purchase.
Correct couplings protect connection integrity and help the tubing string meet the mechanical and sealing expectations of the completion design. Share your tubing tally and API 5CT call-outs so CNPS can align coupling supply to the same grade and thread family.
Key applications
- Production and injection tubing strings
- Workover and completion tubular make-up
- API 5CT-specified coupling replacement and stocking
What to confirm with CNPS
- Size / rating / medium / standards you need (OD, grade, NU/EU or other thread)
- Quantity, marking, and inspection requirements
- Any special material, coating, or connection extras
