Spiral Drill Collar With Elevator Groove And Slip Groove

Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API spec7-1. Hard banding is optional at customers requests.
The cost of introducing:
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Contact information:
Tianhe Oil Group Co., Ltd
No.43,West Diming Street ,Mudanjiang City,Heilongjiang Province,China[157011]
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