Comprehensive Drill Design and Supply Company  - Drillwell Ltd

DRILLWELL LTD
Comprehensive Drill Design and Supply Company

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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

 

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

 

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

Drill Collars - Part Numbers

 

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

  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.

if you require to order any of the items above or a bespoke design then please email or contact us.

Drill Rod Product Range

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IF DRILLING IS YOUR GAME
"DRILLWELL” IS THE NAME

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