Origin	China
Model Number	NC

Product Description:

Spiral Drill Collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure.

Customer Options:

1. Standard: API 7; SY/T 5144; or Non-Standards. 

2. Type: Spiral Drill Collars.

3. Material: AISI 4145 H.

4. Size: OD (3 1/8''---14'') *ID (1 1/4''---3'') * Length (10'---31').

5. Slip & Elevator Recess

6. Cold Rolling of Thread Roots

7. Stress Relief Groove

8. Hard banding: Iron-Matrix Powder Alloy; ARNCO 100XT; 200XT; 300XT; etc.

9. Thread Surface Process: Phoscoating or Copperize Process Treatment.

10. Delivery Condition: Forged Bar; Semi-Finished; Finished Spiral Drill Collar.