Drill Collar

The Drill Collars are made of AISI 4145 H or 4145 H Modified alloy steel. Bores are trepanned from one direction with no mismatch. All drill collars are heat-treated with hardness within 285 to 341 BHN, which are guaranteed one inch below the surface of the pipe.
When inquiry or order, please specify:
- Type (slick or spiral grooved)
- Outside and inside diameters and overall length
- Connection size and type
- API Stress relief groove on pin and box ends
- Cast or pressed steel thread protectors
- Elevator recess or not
- Hard-banding or not
- Non-magnetic or

Drill Collar

DATA SHEET FOR SLICK TYPE DRILL COLLAR

Size (in) Bore (in) Connection Weight (lb) Size (in) Bore (in) Connection Connection
30 ft 31 ft 30 ft 31 ft
3 1/8 1 1/4 NC23 651.2 673.2 6 3/4 2 1/4 4IF 3132.8 3207.6
3 1/4 1 1/4 NC23 715 739.2 7 2 13/16 41/2IF 3258.2 3366
3 1/2 1 1/2 2 3/81F 787.6 814 7 1/4 2 13/16 41/2IF 35354 3654.2
4 1/8 2 2 7/81F 1031.8 1067 7 1/2 2 13/16 41/2IF 3830.2 3957.8
4 1/4 2 2 7/81F 1119.8 1157.2 7 3/4 2 13/16 6 5/8 Reg 4129.4 4268
4 1/2 2 2 7/81F 1287 1331 8 2 13/16 6 5/8 Reg 4439.6 4587
4 3/4 2 1/4 NC35 1383.8 1430 8 1/4 2 13/16 6 5/8 Reg 4769.6 4928
5 2 1/4 31/21F 1575.2 1628 8 1/2 2 13/16 6 5/8 Reg 5093 5262.4
5 1/4 2 1/4 3 1/21F 1784.2 1843.6 8 3/4 2 13/16 6 5/8 Reg 5440.6 5621
5 1/2 2 1/4 31/21F 1991 2057 9 3 7 5/8 Reg 5695.8 5885
5 3/4 2 1/4 4FH 2219.8 2294.6 9 1/4 3 7 5/8 Reg 6067.6 6270
6 2 1/4 NC44 2450.8 2532.2 9 1/2 3 7 5/8 Reg 6430.6 6644
6 1/4 2 1/4 41F 2692.8 2783 9 3/4 3 7 5/8 Reg 6815.6 7040
6 1/2 2 1/4 41F 2948 3047 10 3 8 5/8 Reg 7207.2 7447

Thread Protector

Thread ProtectorThread ProtectorThread Protectors are made of cast steel, available in sizes from 3-1/8” to 11”. The products are ideal for handling and protecting swivels, drill collars, tool joints and wear subs. The unique handle speeds the safe movement of all equipment and are available in sizes from 3-1/8” to 11”.

Lift Sub

Lift SubThread Protectors are made of AISI 4145H-modified steel, with available in sizes from 3-1/8” to 11”.

Lift Plug

Lift Plug
Technical Specifications for Lift Plugs
 Drill Collar Size A
(in)
 Lifting Plate Diameter B
(in)
 Approximate Weight
(lbs)
 Connection Bore C
(in)  
3-1/2 - 3-7/8 5-1/2 35 1-1/2
4 - 4-3/8 6 40 2
4-1/2 - 4-7/8 6-1/2 50 2-1/4
5 - 5-3/8 7 58 2-1/4
5-1/2 - 5-7/8 7-1/2 70 2-1/4
6 - 6-3/8 8 82 2-1/4
6-1/2 - 6-7/8 8-1/2 90 2-1/4
7 - 7-3/8 9 100 2-13/16
7-1/2 - 7-7/8 9-1/2 118 2-13/16
8 - 8-3/8 10 128 2-13/16
8-1/2 - 8-7/8 10-1/2 132 2-13/16
9 - 9-3/8 11 150 2-13/16
9-1/2 - 9-7/8 11-1/2 165 2-13/16