Shenlong’s drill collars are manufactured from 4145H modified steel.Drill collars are
bored and drifted to API Spec7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec7.Hardness range of 285-341HB and a charpy “V” notch impact value of 54joules are guaranteed one inch below the surface.
On enquiries and orders ,please specify:
Slick or spiral;
Drill collar OD;
Drill collar bore:
Length of drill collar;
Stress-relief grooves decease the frequence of fatigue failures by improving the bending strength of pin and box connections and reducing high stress concentrations.Sress-relief features are manufactured in compliance with API Spec7,unless otherwise specified by customers.
Slip recess and elevator recess :
Shenlong offers optional elevator and slip recesses to improve handling efficiency and safety.The
upper radius of elevator recess is cold-rolled to increase product life.Slip and elevator recesses can be used together or seperately.Unless otherwise specified,slip and elevator recesses are machined in compliance with API RP7G guidline.
Contact Name: Penny Zhang
Company Name: Shenlong Petroleum Drillingtools Co., Ltd
Street Address: Technology and Industrial
Garden, Yugong Road, Jiyuan,
Member name: Cnpenny
Member Since: 08 April 2008
Total Leads: 7 Cnpenny Import Export Business Leads
Business focus: Drilling Tools, Drill Collar, Drill Pipe, Stabilizer, Kelly, Drill Stem Subs
Verify: Safe Import Export Tips
Product Category: Drill collars