Limestone Quarry Plant

One of the Top 500 enterprises in China foreign trade

QCCO was approved as a member of “China Association for Contracting Projects Abroad “and granted a membership certificate on Sep 28,2005; “Credibility Rating AAA certificate in Foreign Trade” was granted to QCCO by China Shippers’ Association


Geological Drilling Pipe


API drilling pipe: 
1) OD: 2 3/8"-5 1/2" 
2) grade: E, X, G, S 
3) upset type: EU, IU, IEU 
4) wall thickness: 7 - 12.7 mm 

API drilling pipe: 

1)drill pipe OD: 2 3/8", 2 7/8", 3 1/2", 4", 4 1/2", 5", 5 1/2" 

2)API drilling pipe Steel Grade: E75, X95, G105, S135 
3)Type of end finish: EU-external upset, 

IEU-internal & external upset 

4)All seamless steel drill pipes are made according to API 5 Drill pipe standards. 

5)We can provide seamlesssteel pipe according to customers' requirements. 

6) Wall thickness: 7 - 12.7 mm or 2 3/8"-5 1/2" 

7)length: 5.49-12.5m 

Regarding the Drill Pipe, the OD from 2 3/8" to 5 1/2" and steel grade from E75 to S135. Mainly used in oil and gas exploration and development process of deep well, horizaontal well and extended reach well. With the Hardbading and Internal Coating. 


Avoid drill pipe wear and prolong life 
Avoid friction caused by thernal cracking failure of drilling joints. 
The wear-resisting coefficient has reduced performance with wear casing. 
Harbanding Type: 

TCS 8000 
BoTn 3000 
BoTn 1000

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