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Home » Products » Geological Drill Pipe
Related Searches: Geological Drill Pipes | China Drilling Pipes for Geological | Hydrological Drilling
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Geological Drill Pipe

Geological Drill Pipe
This geological drill pipe is mainly composed from the small pitch screw thread between rod body and joint. And it features high cost-effective, good wear resistant and long service life. We provide six kinds of geological drill pipes in different diameters for customers around the globe.

Application

This kind of geological drill pipe is especially suitable for the geological, hydrological, coalfield, geothermal and engineering drilling.

Features

1. The material of thin buckle drill pipe was provided from Baogang Group,China's largest steel enterprise’ STM - R780 (42 mnmo7) material, which performance is stable and reliable.
2. The end of the drill pipe was after intermediate frequency heating, hydraulic upsetting and heat treatment, which effectively eliminate the early processing of internal stress.
3. Tool joint chooseChina's top steel mills’ 40 Cr or 42 CRMO materials, which proceeding conditioning heat treatment after rough machining and surface nitriding treatment.
4. These treatments effectively eliminate the phenomenon of fastening, pull clasp, becoming more wear-resisting and easily remove.
5. All the thread was shaped by numerical control lathe blade, with precision concert and strong interchangeability.
6. Thread sealing grease should be used when connecting the pipe and the joint, and hammer knocking should be prohibited.
7. During the relocation of drill pipes, the thread protector should be screwed on the threaded parts so as to protect it from damages.

Parameters of Geological Drill Pipe

SPEC
Type of Upset
Pipe Body Wall Thickness(mm)
Pipe Body ID (mm)
Type of Thread
Pipe Body Material
Match Tool Joint
Thread Pitch (Number of Thread per Inch) (mm)
Taper
Base Level Mid-Diameter(mm)
Length (mm)
Grade
Tensile Strength(MPa) Min
Yield Strength(MPa) Min
E.L. (%)
Φ42×5
IU
5
32
2.54(10)
1:16
40.664
50
STM-R780
780
520
15
Φ57
Φ50×6.5
6.5
37
2.54(10)
1:16
48.664
55
STM-R780
780
520
15
Φ65
Φ60.3×7.1
7.1
46.1
3.175(8)
1:16
58.266
60
STM-R780
780
520
15
Φ78
Φ60.3×7.1
EU
7.1
46.1
3.175(8)
1:16
65.576
60
STM-R780
780
520
15
Φ86
Φ73×9.19
9.19
54.6
3.175(8)
1:16
79.877
67
STM-R780
780
520
15
Φ105
Φ89×10
10
69
3.175(8)
1:16
95.244
67
STM-R780
780
520
15
Φ121
We can apply designated connection and length as per customers' requirement.

Parameters of Tool Joint

SPEC

OD (mm)

ID (mm)

Pin TJ Length (mm)

Box TJ Length (mm)

Connection Type

Material

Match Drill Pipe

Thread Pitch (Number of Thread per Inch)

(mm)

Taper

Base Level Mid-Diameter(mm)

Grade

Tensile Strength(MPa)
Min
Yield Strength(MPa)Min

E.L.

( %)

Φ57

57

22

165

235

2.524(6)

1:5

40.808

40Cr

980

785

9

Φ42

Φ65

65

26

190

255

2.524(6)

1:5

48.808

40Cr

980

785

9

Φ50

Φ78

78

35

215

290

2.524(6)

1:5

59.631

40Cr

980

785

9

Φ60.3(IU)

Φ86

86

44.5

240

310

3.095(4)

1:6

67.767

40Cr

980

785

9

Φ60.3(EU)

Φ105

105

50

343

280

3.095(4)

1:6

80.848

40Cr

980

785

9

Φ73

Φ121

121

65

355

280

3.095(4)

1:6

96.723

40Cr

980

785

9

Φ89

We can apply designated connection as per customer's requirement.

We can apply designated ID as per customer's requirement.

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