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drill pipe
Standing inventory of 2,000 tons, contact us via message or email for details.
drill pipe

Drilling Pipe Classification

After a spherometer check, drill pipes are classified in one of three categories:

1、N-class pipe, or new pipe.

The strongest, newest pipe available. Usually in pristine (or close to it) condition.

2、P-class pipe, or premium pipe.

A step-down from N-class pipe, premium pipe have endured some wear, but can still function very capably.

3、C-class pipe

C-class pipe, of which there are three classes (C-1, C-2, and C-3). Depending on their rating, C-class pipes are either well-worn pipes, or nearing the end of their useful lives.

After a pipe has reached the end of its useful service life, they will be graded for scrap, denoted with the application of red bands. Because of the high cost of drill pipes, remember that they are often reused, with many companies selling both new and used pipes (graded according to the criteria mentioned above) often until the very end.

Features of Carbon steel drill pipe coupling

Features of Carbon steel drill pipe coupling:

The piston of DTH Hammer uses the special (imported) high nickel alloy steel, with advanced heat treatment as military industry standard.
Strengthening processing on hammer surface for higher were-resistance.

Specially designed drill bits for middle soft and hard rock formations. Easily disassembly thread for easy maintenance.

 3、 Efficiency

Extra-short structure design DTH hammer and bit for great efficiency of high impact energy transmission, with high impact power and fast drilling rate.

Drilling pipe chemical composition

Steel GradeMass fraction, % based on heat and product analyses a,g
max bmax bmaxmaxmaxmaxmax
Seamless Pipe
X600.28 e1.40 e0.30.3fff
X650.28 e1.40 e0.30.3fff
X700.28 e1.40 e0.30.3fff
Welded Pipe
X600.26 e1.40 e0.30.3fff
X650.26 e1.45 e0.30.3fff
X700.26e1.65 e0.30.3fff

Drilling pipe mechanical property

Pipe GradeTensile Properties – Pipe Body of SMLS and Welded Pipes PSL 1Seam of Welded Pipe
Yield Strength aTensile Strength aElongationTensile Strength b
Rt0,5 PSI MinRm PSI Min(in 2in Af % min)Rm PSI Min

Drilling Pipe Specification

89Type drill pipe(Double buckle)
Diameter(mm)Length(mm)Thread modelWeight(kg)Remarks
891500API 2 3/8" IF28Nitrogen treatment
892000API 2 3/8" IF34
893000API 2 3/8" IF46
896000API 2 3/8" IF88
102Type drill pipe(Single buckle)
Diameter(mm)Length(mm)Thread modelWeight(kg)Remarks
1021500API 2 7/8" IF37Nitrogen treatment
1022000API 2 7/8" IF46
1023000API 2 7/8" IF64
1026000API 2 7/8" IF118
102Type drill pipe(Double buckle)
Diameter(mm)Length(mm)Thread modelWeight(kg)Remarks
1021500API 2 7/8" IF38Nitrogen treatment
1022000API 2 7/8" IF47
1023000API 2 7/8" IF65
1026000API 2 7/8" IF119


Our steel products are mainly used in chemical industry, petrochemical industry, offshore, seawater pipeline, desalination plant, nuclear engineering, paper and pulp industry.

Oil and GasKuwait is a country of petroleum resources with abundant, oil factory also is very broad, respectively, the oil plant are mainly used for refining oil and oil processing.
MarineSubmarine pipelines carry such things as domestic water, waste water, electrical lines, gas lines, communication lines, and outfall or intake systems.
ConstructionBridge materials with high strength, low cost for selecting the main basis, give priority to with development of the traditional steel and concrete.
EnergyEngineering is mainly aiming at the water pollution and solid waste pollution. using the steel pipe to filtrate in order to improve the quality of water.

Factory Display

Factory Display

Tianjin tisco is a one-stop steel pipe supplier for global manufacturers.