The kelly connected to the pile is used for drilling sand and gravel.

Full lock kelly used with piling rigs for drilling gravel in silt, clay and sand with lower density.

Friction Kelly is used with piling rigs to drill gravel in silt, clay and sand with lower density.

​The whole set of kelly bar with light weight, high strength, high linearity of the single section, thin pipe wall, small seam
between sections and good wear resistance of internal and external keys, it greatly satisfies the special requirements of rotary
drilling machine.

Strict selection of steel grade to make sure strength at the max torque.

Senior technical experts provide technical support solutions.

Customized solutions according to customer needs.

Company profile

Langfang Yilunkai Group, whose predecessor is Quansheng Machinery Plant (founded in 1992), is established in July, 2006 with 10 million RMB of total registered capital. The Group owns 3 subsidiaries,which is Langfang Yilunkai Foundation& Engineering Co., Ltd,Tianjin Jinyiyuan Heavy Machinery Manufacturing Co., Ltd ,andLangfang Yilunkai Mechanic & Electronics Technology Co., Ltd.Tianjin Jinyiyuan Heavy Machinery Manufacturing Co., Ltd is blessed with geographical advantage as it is located in the Beijing-Tianjin-Hebei region .It mainly manufactures three series of productions, which are:

A. Rotary drilling tools;

B. casing of casing rotator and Rotary drilling, grab bucket;

C. Rotary drilling kelly bar Currently.

Tianjin Jinyiyuan Heavy Machinery Manufacturing Co., Ltd.: Mainly produces rotary drill pipes, full follow-up casings, pipe jacking machines, pipe rolling machines and various casings in the full-rotation industry. Chengdu, Guiyang branch company mainly sells and maintains a series of drilling tools and drill pipes.

Tianjin Jinyiyuan Heavy Machinery Manufacturing Co., Ltd. is affiliated to Langfang Yilunkai Group Company. Langfang Yilunkai Group Co., Ltd. was established in July 2006 (its predecessor was Quansheng Machinery Processing Factory and was founded in 1992). It has 3 subsidiaries, 2 branches, 2 offices, and a total registered capital of 5000 Ten thousand yuan. The company has 718 employees, including 89 professional and technical personnel and 48 senior titles. The company has a large number of advanced production equipment, has a strong production flow and strong foundation construction capabilities, the current production and operation of fixed assets have reached 1.2 billion yuan.

The company's main business:

1. Rotary drilling tools series.

2. Follow up with casing and punching grab series.

3. Rotating drill pipe series. The company adheres to the concept of "quality first, reputation first, customer first", scientific management, standardized operation, continuous improvement, and customer satisfaction.