Drillwell Ltd - Drill 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.

They are used to add weight to the drill string immediately behind the bit in order to provide a straighter hole.

Drill Collars - Drillwell Ltd

Drill Collars - Dimensions

Drill Collars - Part Numbers

 

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 I.F

2  3/8 I.F

2  7/7 I.F

2  7/8 I.F

3  1/2 I.F

  A/F Flats

2.75   70

3   76

3.75   95

4.00   102

4.25   108

 

3  1/2

3  3/4

4  1/2

4  3/4

5

  3m. 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

 

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 I.F

3  1/2 I.F

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

 

5  1/2

5  3/4

6

6  1/2

6  3/4

  3m. long

DW 05525

DW 05530

DW 05535

DW 05540

DW 05545

  1.5m. long

DW 05526

DW 05531

DW 05536

DW 05541

DW 05546

Our in house engineers 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.

DRILLWELL LTD

Comprehensive Drill Design and Supply Company

Drillwell Ltd
Unit 3, Rotherham Close
Killamarsh, Sheffield, S21 2JU
Tel No: 0114 2487333

Comprehensive Drill Design and Supply Company  - Drillwell Ltd
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