DRILL STEM SUB
NiUW GLINIK is also manufacturer of drill stem subs used in rotary drilling rigs. They are used to connect elements of the drill string and drilling tools. Manufacturing process of these tools is carried out in accordance with the requirements of API Spec. 7-1. The dimensions of the external and internal diameters of drill stem subs are adjusted to the sizes of the connected elements of the drill string.
The drill stem subs are made of stainless steel for quenching and tempering.
The pins of these tools are coated with zinc. Thread connections are protected against mechanical damage with polyethylene protectors.