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Natural gas drilling projects

Oil well drilling projects

Technical Specifications

Size		Nominal weight	Plain end weight		Wall thickness		Inner diameter
mm	inch	lb/ft	lb/ft	kg/m	inch	mm	inch	mm
60	2 3/8	6.65	6.26	9.33	0.28	7.11	1.815	46.1
73	2 7/8	10.4	9.72	14.47	0.362	9.19	2.151	54.6
89	3 1/2	13.3	12.31	18.34	0.368	9.35	2.764	70.2
89	3 1/2	15.5	14.63	21.79	0.449	11.4	2.602	66.1
102	4	14	12.93	19.27	0.33	8.38	3.340	84.8
102	4	15.7	14.69	21.87	0.38	9.65	3.240	82.3
114	4 1/2	16.6	14.98	22.32	0.337	8.56	3.826	97.2
114	4 1/2	20	18.69	27.84	0.43	10.92	3.64	92.5
127	5	19.5	17.93	26.7	0.362	9.19	4.276	108.6
127	5	25.6	24.03	35.8	0.5	12.7	4	101.6
140	5 1/2	21.9	19.81	29.52	0.361	9.17	4.778	121.4
140	5 1/2	24.7	22.54	33.57	0.415	10.54	4.67	118.6
168	6 5/8	25.2	22.19	33.04	0.33	8.38	5.965	151.5
168	6 5/8	27.7	24.22	36.06	0.362	9.19	5.901	149.9

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What materials are used for the DTH drill pipes?

The standard material configuration for our DTH drill pipes is as follows:

Tool joints: 42CrMo alloy steel
Pipe body: R780 steel

Other material combinations can be customized based on specific application requirements.

How should drill pipe length be selected?

Drill pipe length is typically selected according to the drilling rig specifications and operating conditions. Common standard lengths include 1.5m, 3m, and 6m. Custom lengths can also be manufactured upon request.

How should DTH drill pipes be maintained?

To extend service life and maintain reliable performance, we recommend the following maintenance practices:

Apply an appropriate amount of thread grease to the joints before each use
Clean the drill pipes after operation to remove mud and debris
Inspect drill pipes regularly and promptly repair or replace damaged or deformed components
Store drill pipes away from heavy loads and high-humidity environments to prevent deformation and corrosion

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