API Square Kelly Drilling
Zhenjiang Boral Machinery and Equipment Co., Ltd.- After-sales Service：18mths
- Warranty：18mths
- Manufacturing Process：Forging
- Surface Treatment：Without Processing
- Operation Pressure：Atmospheric Pressure
- Material：Cast Steel
Base Info
- Model NO.：DRILL BIT
- Lead Time：15-30days
- Transport Package：Wooden Box
- Specification：customized
- Trademark：JSH
- Origin：China
- HS Code：8431431000
- Production Capacity：5000sets,Year
Description
Basic Info.
Model NO. DRILL BIT Lead Time 15-30days Transport Package Wooden Box Specification customized Trademark JSH Origin China HS Code 8431431000 Production Capacity 5000sets/YearProduct Description
Kelly is the drive part of whole drill stem, it has two types, square kelly and hexagonal kelly and all of them are manufactured comfort to API Spec7-1 and SY/T6509-2000 criterion.
Our Square& Hexagonal kelly are made from AISI 4145H modified alloy bars that are quenched and tempered full length. After such heat treatment, its brinell hardness can reach 285-341. Kelly's end, drive cross-section and joint are all processed and tested comform to API criterion.The formulated process can ensure that the misalignment of the hole reaches the standard wall thickness. Kelly bars are manufactured according to API-7-1 Spec.
