Drill Pipe
Application: Used for Mine, water well drilling, well drilling, coal and fore poling Size:OD: 60.32mm-168.28mm,WT: 6.45-12.7mm,LENGTH: R1, R2, R3 Pipe Standard:API 5DP E75, X95, G105, S135 Upset Style:IU, EU, IEU Connection:NC26 - NC50, 5 1/2FH, 6 5/8FH Internal coating:TK34,TC2000, Arnco 100XT, 200XT, 300XT
Tel: +86 18053187569
WhatsApp: +86 18053187569
Email: sales15@yilimetal.com.cn


Drill pipes are long tubular sections of pipe that make up the majority of the drill string. They are typically a 31 foot long section of tubular pipe but may be anywhere from 18 to 45 feet in length.

Heavy weight drill pipe (HWDP) is a tubular pipe that adds weight or acts as a transitional piece in the drill string. As a transitional section of the drill string, it is placed between the drill collar and standard drill pipe to reduce fatigue failures. In other applications the HWDP is used as an additional weight to weigh down the drill string.

Heavy weight drill pipe is a medium-weight drilling pipe, (referred standards in API SPEC 7-1). It has bigger wall thickness than common drilling pipe and smaller than drill collar.

Drill collars are a component of the drill string that makes up part of the BHA. They are thicker-walled, heavier, and more rigid than drill pipes and are primarily used to weigh down the drill bit while dampening vibration and impact forces.

Drill Pipe:2-3/8" to 7-5/8" OD, Range 2 and 3

Heavy Weight pipe:2-3/8" to 6-5/8" OD, Range 2 and 3

Drill Collars:2-7/8" to 14"

Grades: E75, X95, G105, S135

Connection threads:NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH.

Internal Upset: IU, EU, IEU


Size designationCalculated weightTool joint designationCalculated weightgradeWall thicknessUpset ends
2 3/86.65NC266.269.32E.X.G.S0.287.11EU
2 7/810.4NC319.7214.48E.X.G.S0.3629.19EU
3 1/213.3NC3812.3118.34E.X.G.S0.3689.35EU



Yili(China)Steel Materials Co.,Ltd was established in 2007, located in Shandong Province with our own factories of 20000 m2. We have passed the "ISO9001 quality system certification, and EU CE certification".
 In 2011, we opened the market to the abroad. Our company is the collection of processing and trading. And we have high supply ability. In 2018, Shandong Yili Metal Material Co.,Ltd was rated as "Shandong High-tech Enterprise". Our main manufactures are stainless steel, galvanized steel, carbon steel and etc. That apply to engineering, coal mine, textile, electric power, boiler, machinery, military industry and other fields. 

We stick to the principle of "quality first, service first, continuous improvement and innovation to meet the customers" for the management and "zero defect, zero complaints" as the quality objective. We′re pleased to get your Inquiry and we will come back to as soon as possible.