Drill Collars

①Drill Collars

Technical Features：

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

②Thread Protector

Thread 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”.

③Lift Sub

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

④Lift Plug

DATA SHEET FOR SLICK TYPE DRILL COLLAR