Oil country tubular limited [octl] processes oil country tubular goods required for the oil drilling and exploration industry. Octl`s product range consists of drill pipe, heavy weight drill pipe, drill collars, production tubing, casing, tool joints, couplings, pup joints, nipples, subs, and cross overs. Oil country tubular limited has been assessed and certified by the american petroleum institute quality registrar [apiqr] as being in compliance with iso 9001:2000 quality system. Api couplings possess the following unique features:
1. finished api couplings for non upset and external upset tubing upto 4 1/2" od in accordance with api specifications 5ct and 5b, in all grades can be
Supplied with either zinc or manganese phosphating.
2. finished api couplings for casing upto 13 3/8" od covering short and long round thread and buttress thread in accordance with api specifications 5ct and 5b, in all grades can be supplied with either zinc or manganese phosphating.
3. all the couplings are 100% inspected for critical thread parameters
4. magnetic particle inspected and verified for their mechanical properties.
5. test and inspection results are all documented.
