Spiral Drill Collar

 

Spiral drill collars reduce wall contact between the drill collar and the wall of the hole to prevent differential wall sticking. They are manufactured strictly according to API Spec7-1 .All mechanical properties meet with this standard.

 

Size: OD 31/2”~11”, length: 10ft~31ft

 

Mechanical Properties

 

 

 

When ordering or requesting quotations on drill collars, please specify:      

 

1. Drill collar OD

2. Drill collar ID

3. Overall length

4. Connections required (size and type)

5. Special features desired, for example:

    Stress Relief Features

    Slip and/or Elevator Recess

    Hard banding