Drill Rod Collars

//Drill Rod Collars
Drill Rod Collars2018-08-12T19:12:28+00:00

Drill Rod Collars

Drill Collars are manufactured in house by our very own Drillwell engineers. They are a bespoke design made from solid high tensile alloy steel bar with centre bore gun drilled. We can manufacture the Drill Collars with or without spanner flats. Drill Collars are used to add weight to the drill string immediately behind the bit in order to provide a straighter hole.

Drill Rod Collar - Drillwell Ltd

we can manufacture custom length and thread combinations on request. Laykeys and spanners can also be supplied to suit the flats on any of our Drill Collars or Drill Rods of which are always available from stock.

Drill Rod Collars – Dimensions

3 1/2 3 3/4 4 1/2 4 3/4 5
In.   mm. In.   mm. In.   mm. In.   mm. In.   mm.
Collar O.D. 3.50   90 3.75   95 4.50   115 4.75   120 5.00   125
Bore 1.50   38 1.50   38 2.00   50 2.00   50 2.25   57
Threads 2 3/8 IF 2 3/8 IF 2 7/8 IF 2 7/8 IF 3 1/2 IF
A/F Flats 2.75   70 3   76 3.75   95 4.00   102 4.25   108

5 1/2 5 3/4 6 6 1/2 6 3/4
In.   mm. In.   mm. In.   mm. In.   mm. In.   mm.
Collar O.D. 5.50   140 5.75   145 6.00   150 6.50   165 6.75   170
Bore 2.25   57 2.25   57 2.25   57 2.25   57 2.25   57
Threads 3 1/2 IF 3 1/2 IF 4 1/2 Reg 4 1/2 Reg 4 1/2 Reg
A/F Flats 4.75   120 5.00   127 5.25   133 5.75   146 6.00   152

Drill Rod Collars – Part Numbers

3 1/2 3 3/4 4 1/2 4 3/4 5
3.0m Long DW 05500 DW 05505 DW 05510 DW 05515 DW 05520
1.5m Long DW 05501 DW 05506 DW 05511 DW 05516 DW 05521

5 1/2 5 3/4 6 6 1/2 6 3/4
3.0m Long DW 05525 DW 05530 DW 05535 DW 05540 DW 05545
1.5m Long DW 05526 DW 05531 DW 05536 DW 05541 05546

If you require any further information or a bespoke design then please email or contact us.