Geological Drill Pipe,China Drilling Pipes for Geological, Hydrological Drilling

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
SPEC	Type of Upset	Pipe Body Wall Thickness(mm)	Pipe Body ID (mm)	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. (%)	Match Tool Joint
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
SPEC	OD (mm)	ID (mm)	Pin TJ Length (mm)	Box TJ Length (mm)	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. ( %)	Match Drill Pipe
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.