DRILL COLLAR
Drill Collar Roller (slic) drill collars according to API 7-1 spec 7G full length, heat-treated.

Made from chromium molybdenum alloy steel 4145 H as follows:
Item Specifications Unit Qty
1 3 1/2"ODx1 1/2"ID (30-31)FT length 2 3/8"API IF (NC26) BOX up -2 3/8API IF(NC26) PIN down without slips and elevator recesses single 20

Remarks
1. Each Drill Collar should equipped with internal & external cast steel thread protectors
2. Each Drill Collar and thread should be marked with API 7-1 monogram
3. Hardness of metal should be mentioned
4. All certificates of inspection are enclosed with shipment
5. All threads should be copper or phosphate plated
6. The manufacturing and country of origin must be mentioned in offer
7. Materials are new and unused
8. API-7-1& ISO certificates should be enclosed with the offer
9. Technical catalog or sheet should be enclosed with the offer with shipment
10. Mechanical test and analysis licenses for metal should be provide with shipment
Certificate issued by neutral international inspection company approved that the materials ar