Bournedrill manufacture a full range of rotary subs to suit all drill pipe and tubing threads of standard and non-standard forms and styles.
Subs are available in Pin to Pin, Pin to Box, or Box to Box and may be ordered in any combination of thread types and sizes, to enable the connection and joining of different drilling strings, drilling bits, tools and accessories.
Rotary subs are made from 4140/4145 alloy steel heat treated prior to machining. Modern computer numerical controlled machined threads are gauged to assure conformance to standards. Wrench flats, special breakout configuration and protectors are available on request.
All enquiries and orders for rotary subs must specify –
1. Type of sub 5. Breakout / Flats
2. Overall Length 6. Size of Upper and
3. Largest Diameter Lower Connections
4. Internal Diameter 7. Any special Features