The subs are designed for coupling the parts of a drill string and connection to it of tools used in the process of well drilling. The subs are manufactured in all standard sizes according to GOST 7360-82.
Following types of subs are manufactured:
- P – adapter-type (М-N);
- М – coupling-type;
- N – nipple-type.
Strength groups: D, К, Е, L, М, R
- Manufacturing of subs according to customer’s requirements specification is possible.
Purpose