Spiral drill collar

spiral drill collar in api spec 7, 1.standard:API 7-1, 2.OD:79.4mm-279.4mm, 3.Certifactes: ISO ,API 7-1, 4.Moq: 25 tons - details see: https://www.machineto.com/spiral-drill-collar-10317546

Place of Origin:Jiangsu China (Mainland)	Brand Name:yaou	Model Number:Spiral drill collar	Type:Drill Collar
Machine Type:Drilling Equipment	Certification:API	Material:Carbon Steel	Processing Type:Forging
Use:Well Drilling

Spiral drill collar

sjype:yaoutrade2

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 spec 7-1 .Hard banding is optional at customers request.
Technical specification and parameters.

Drill collar ranges O.D. (mm)	Elevator groove depth(mm)	Elevator groove length(mm)	Slip groove depth(mm)	Slip groove length(mm)
101.6117.5	5.6	4.8	406	457
120.6142.9	6.4	4.8	406	457
146.0168.3	7.9	6.4	406	457
171.4219.1	9.5	6.4	406	457
≥222.2	11.1	6.4	406	457