API SPEC 7-1 Hexagonal Kelly for Drilling String
It is used to transmit torque, bear drill string weight and transport drilling fluid.Kelly consists of drive part, up and down connections. The up box is a left hand thread while the down pin is a right hand thread. The water hole is round.
Main Data sheet
Overall length Effective length
| General Kelly |
12.2m |
11.28m |
| Optional Kelly |
16.4m |
15.54m |
Our Company
Shandong Yacheng Petroleum Technology Co., Ltd is a wholly-owned subsidiary of Xincheng Petroleum Group. It is a comprehensive service platform for petroleum equipment supply chain management and international trade of Xincheng Petroleum Group.Xincheng Petroleum Group was founded in 2003, mainly engaged in oil and gas energy technology services, research, development and manufacturing of petroleum equipment, and is headquartered in Dongying, a coastal city in the Yellow River Delta of China.Shandong Yacheng Petroleum Technology Co., Ltd. has experienced technical engineers, after-sales operation and maintenance engineers, and supply chain resource management engineers in oil drilling and drilling equipment.Shandong Yacheng Petroleum Technology Co., Ltd. helps customers to provide oil rig solution design, provides customers with high-quality petroleum equipment made in China, and are committed to developing an international drilling equipment solution provider and quality equipment service provider.
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