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. Octl lift subs have the following salient features:
1. octl lift subs are made from aisi 4140/ 4145h modified alloy steel
2. octl lift subs are fully heat treated to a brinell hardness range of 285 - 341
3. octl lift subs has an izod impact strength of minimum 40 ft-lbs.
4. connections are machined, cold rolled, and phosphatized to prevent galling during initial make-up, and are shipped with pressed steel thread protectors installed.
