Drillstar Industries can provide you with the full range of cross-overs and subs, with sizes up to 20" OD : - Straight OD subs. - Cross-Overs or reduced section subs. - Bit subs. - Saver subs - Rotary subs - Pup joints - etc. All our Cross-Overs and subs are made according to API specifications (7-1 and/or 5CT) and API standard features can be added (stress relief grooves, bores for API float valves, etc.) They can be fitted with the whole range of API drill stem (REG, API, etc.) and casing threads (STC, LTC, BTC...). VAM premium threads can also be used, as well as other special connections (Hydril FJWP, etc.) Our subs are fully machined from certified AISI 4145H alloy steel. Other materials such as non-magnetic steel, inconel, monel, stainless steel, aluminium, titanium, etc. can be used.

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