Veigao Petroleum Drilling Tools Manufacturing Co., Ltd

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1. Square Kelly and Hexagonal Kelly

Square Kelly
hexagonal kelly
Kellys are the drive section of the whole drill stem. The manufacturing of the products refers to the standard of SY/T6509-2000 or API SPEC. 7-1. AISI4145H alloy steel is used in producing the kellys. Kellys'end, ...

2. Drill Collar With Slip Groove,sxweigaowsj(at)live.cn

Drill Collar With Slip Groove
Slip groove made on box thread face of slick collar can be used as lifting sub and safely slip when trip out. The technical parameters for slip groove is as per API spe. 7-1. Hardbanding is optional at cusomers' ...