Drill Collars

Spiral Drill collars are the most important parts of all drilling string elements, the performance of spiral drill collars with effect the efficiency of drilling.

Our mission is to provide you spiral drill collars not only in competitive price, but also high quality, Spiral drill collars are used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure.

Spiral drill collars are manufactured strictly according to API Spec. 7 and Standard SY5144, Order instruction, please specify: Drill collar OD Drill collar Bore Length of Spiral Drill collar Connection Type

• Disposable Face Mask
• Non Woven Masks
• disposable n95 respirators
• swine flu mask
• Drill Pipes