Spiral Drill Collar

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Spiral Drill Collar
Posting date : Aug 30, 2011
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S07-
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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

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