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Time: May 2019
Place: Iraq
Project: il pipeline
Customer review:The welding drill pipe we offered to our client is made of S135 steel. The drill pipe comes with laser processed joints. The hardness of the drill pipe joints is 25 times higher than that of joints treated with surface nitriding hardening technology. What's more, the life span of the drill pipe is 3-4 times longer than that of nitride treated joints.


Time: December 2017
Place: Anhui, China
Project: drilling operation across a river (1100m long)
Product requested:140*10.54*9.6m drill pipe


Time:January 2019
Place: Henan, China
Project: drilling operation under a 1000m long road construction
Product requested:194*12.7*9.6m friction welding drill pipe, with 6-5/8FH joints


Time:October 2018
Place: Aojiang, China
Project:drilling operation under a river (2600m long)
Product requested:194*12.7*9.6m friction welding drill pipe, with6-5/8FH joints


Time: August 2018
Place: Yueyang, China
Project:drilling operation under a river (2600m long)
Product requested: 194*12.7*9.6m friction welding drill pipe, with 6-5/8FH joints


Time: December, 2014
Place: Russia
Geological condition: clay layer
Project: municipal tunnel project
Drill rig: XC320B drill rig from XCMG
Drill pipe: Caston drill pipe, Φ73*8*3000mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: December, 2011
Place: Zhengzhou, China
Geological condition: high-viscosity soil layer
Project: North Water Transfer Project
Drill rig: DW3000 drill rig
Drill pipe: Caston drill pipe, Φ139.7*10.54*9600mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: January, 2010
Place: Jiangyin, China
Geological condition: clay layer
Project: tunnel project
Drill rig: Caston 32t drill rig
Drill pipe: Caston drill pipe, Φ73*8*3000mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: March, 2011
Place: Dongguan, Guangdong
Geological condition: clay layer
Project: municipal construction project
Drill rig: Hongjian 25t drill rig
Drill pipe: Caston drill pipe, Φ60*7.5*3000mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: July, 2012
Place: Dagang District, Dagang
Geological condition: high-viscosity soil layer
Project: thermal power engineering in fish ponds (1200m)
Drill rig: HT600 drill rig
Drill pipe: Caston drill pipe, Φ139.7*10.54*9600mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: October, 2012
Place: Jinzhou
Geological condition: high-viscosity soil layer
Project: thermal power engineering through rivers (600m)
Drill rig: DW3000 drill rig
Drill pipe: Caston drill pipe, Φ139.7*10.54*9600mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: June, 2016
Place: Songyuan, Jiangxi
Geological condition: sand layer
Project: 1000m gas pipeline
Drill rig: Dehang DH800/1200L drill rig
Drill pipe: Caston drill pipe, Φ114*9*6000mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Time: June, 2016
Place: Russia
Geological condition: black clay layer
Project: municipal tunnel project
Drill rig: imported drill rig
Drill pipe: Caston drill pipe
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality


Client: Sixth engineering company of China petroleum pipeline bureau
Time: June, 2016
Geological condition: clay-sand layer
Project: natural gas project
Drill rig: DW600 drill rig
Drill pipe: Caston drill pipe, Φ168*9.19*9600mm
Customer review: the drill pipe rotates stably and runs smoothly; it is of high price/performance ratio and reliable quality

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