Through strategic alliance with several partners in Europe and in China, TSC is able to offer to our clients drilling collars for all major sizes ranging from 3-1/8” to 10”.

Both slick drill collar and spiral drill collars are available. All drill collars are made of AISI 4145 H or 4145 H modified alloy steel, the overall length are quenched and tempered. Hardbanding and elevator recess are available.