Principal Activity: ​Established as an international procurement company serving PETRONAS Group of Companies and other customers in oil and gas related industries. The procurement services provided by PSI cover the following range of key equipment and materials:
1)Steel ( Oil Country Tubular Goods (OCTG), Linepipes, Structural Steel & Pipe Fittings)
2)Electrical and Instrumentation
3)Mechanical (Rotating & Static)
4)Mechanical (Turbine, Generator & Compressor)

I have a good rapport with PSI. If got offer, take it and request to be placed under category management either for OCTG or Well Cementing (Lafarge).

The session is similar to any Petronas SI - you may sesrch at Petronas thread for the tips.

You can watch this video to get an idea
Petronas MITCO

my ex-company used to get 2+1, etc contract for OCTG, from Kemaman/Labuan as the source of supply.
keywords tubing/casing/accessories premium connections like VAM, TenarisHydril, JFE, GP, etc.
you also can refer to API 5CT, 5L as source for OCTG technical reference.
API = American Petroleum Institute.

a quick processes of OCTG:
1.) Material (carbon steel/ chrome steel 9Cr or 13 Cr or rarely 21 Cr) will be supplied by customer/vendor assist customer to purchase from mill. for premium connections, Jap mills is the most prefer due to the tight tolerance of the material manufacturing processes. Try China mill, and one will regret when come to gauging time.
2.) Start machining (drilling/milling/turning/boring/profiling/CNC). based on length and size (OD ? ", ? lb/ft, ? ft, refer back to API 5CT/Premium Connections like VAM TSLI). G-Code will be used. Some codes are provided and mandatory to be used by premium connection licensees.
CNC machine calibration/inserts/tool holder/jaws/ front and rear spindle is also very important, need to refer back to TSLI again.
3.) QC inspection based on premium connection checklist with gauges (supplied by licensor/API/vendor own properties). customer/TPI (Third Party Inspector) may want to witness this as hold-point.
4.) Stress-relief if required by premium connections technical specifications.
5.) 1G/2G welding, if required. PWHT, if required after welding, the graph to be filed. again customer/TPI may want to witness this as hold-point.
6.) NDT (LPT/MPT/RT/UT), if required. again customer/TPI may want to witness this as hold-point.
7.) Hydrostatic pressure test range xxx PSI - 15,000 PSI, if required. again customer/TPI may want to witness this as hold-point.
8.) Copper plating, if required to achieve certain micron thickness. again customer/TPI may want to witness this as hold-point.
9.) Zinc/Manganese phosphate if require for the premium thread. titration test and some tools calibration are important in this process. again, customer/TPI may want to witness this as hold-point. again, QC inspection.
10.) Horizontal make-up (power tong), dope/dopeless as per pin/box requirements in technical spec, 3 or 4 jaws also very important, if required to produce the torque-turn chart which need to meets certain torque value as per premium connection requirements. again customer/TPI may want to witness this as hold-point.
11.) Paint stripes as per premium connections TSLI/API requirements, if required. Premium connection monogram or API monogram.
12.) Last QC/QA and packing. Delivery.