Drill pipes that are used in applications such as DTH/ DTHR/ DR basically comprise of a steel
Tube with a pin at one end and a box on the other. The job of the drill pipe is to transmit rotational torque and thrust from the drill rig rotary head to down hole drilling tools.
DTH drill tubes are used for connecting DTH hammer and DTH button bits; They are made from seamless tubes. Tubes play a significant role in all DTH drilling, regardless of application, rock type, hole depth or drill rig. The key features of a high quality DTH tube are durability, accuracy and manageability. According to different application, different diameters of drill tubes are needed, basically, smaller DTH hammers need smaller DTH drill tubes, vice avers. Usually we are offering 50mm, 60mm, 76mm, 89mm, etc. ALL DTH drill tubes are friction welded, and usually the threads are standard API connections, like23/8" API REG thread, 3 1/2" API REG thread or API IF thread, etc. According to customers request, from 1000mm to 5000mm length of tubes are available.
Product features:
According to different application, different diameters of drill tubes are needed, basically, smaller DTH hammers need smaller DTH drill tubes, vice avers. Usually we are offering 50mm, 60mm, 76mm, 89mm, etc.
The basis of the selection of the heat treatment process of the drill rod is steel for steel type brazing tools, and with the development of impact rock drilling machinery, various series and categories have been formed. In the production of drill rods, if the steel grade is correctly selected, it is possible to select a heat treatment process that can fully exert the advantages of the steel to ensure the quality and life of the drill rod. The optimum heat treatment process varies depending on the steel grade.
2 The selection of the heat treatment process of the drill rod is based on the basic requirements of the drill rod and the failure analysis of the drill rod. The basic requirements of the drill rod vary from product to species, the cause of the failure of the drill rod, the unreasonable design of the drill rod structure or the various processing steps in the brazing process. Defects, as well as mistakes in use and so on.
However, whether the heat treatment process is appropriate and whether there is a quality problem during heat treatment is inherent and essential. For the most important reason for the failure of the drill rod, after eliminating various external factors, choose the best heat treatment process to ensure the intrinsic quality.
3 Drill rod heat treatment process selection should follow the principles of economy, rationality and feasibility. The current development of heat treatment technology is changing with each passing day, in addition to conventional heat treatment, induction heating, chemical heat treatment, vacuum heat treatment, high energy beam (laser, electron beam) Etc.) New surface strengthening heat treatment techniques such as heat treatment, physical vapor deposition and chemical vapor deposition, ion implantation, and spray coating. The drill rod is an elongated rod. There is a great limitation to the overall treatment. Usually, a heat treatment process cannot meet the basic requirements of each part of the drill rod. Several heat treatment processes should be selected to treat each part separately. How to choose the heat treatment process suitable for the various basic requirements of the drill rod in many heat treatment technologies, it is necessary to consider economics, rationality and feasibility.
4 The final criterion for selecting the heat treatment process is the improvement of the actual service life of the drill rod.
So far, the best judgement of the quality of the drill rod is to conduct rock drilling tests in the field. Prior to this, many domestic and foreign companies and research institutes and universities have developed the drill rod indoor life test bench and life test device. The test or test results can only be relative or as a preliminary choice for the brazing process or heat treatment. The screening method of the process. It should be pointed out that the rock test data in the field mines are often also relative. Only in the same place, the same machine, the same level of operation, the data can be statistically processed to have a relatively reliable contrast. The high life expectancy of the rock drilling test in mines is the most important basis for the selection of heat treatment processes.
Advantages:
Compared with the oversea brands, our advantages are bellowing:
A. Our products can match over 95% against the original products
B. Price are competitive against the famous brands and best quality against the small factory
About Us:
1. Our factory has been specialized in manufacturing drilling tools and spare parts for over 10 years.
2. We have advanced technology and equipment.
3. Our technician has more than 13 year's professional working experience.
4. Rock drilling tools are exported throughout the world. Main market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay, Iran, Philippines, Thailand, India, etc.
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| Size |
Nominal mass Lb/ft |
Calculated weight type |
Wall thickness |
| in. |
mm |
lb/ft |
kg/m |
in. |
mm |
| 2 3/8 |
60.3 |
6.65 |
6.26 |
9.32 |
0.280 |
7.11 |
| 2 7/8 |
73.0 |
10.4 |
9.72 |
14.48 |
0.362 |
9.19 |
| 3 1/2 |
88.9 |
9.50 |
8.81 |
13.12 |
0.254 |
6.45 |
| 3 1/2 |
88.9 |
13.30 |
12.31 |
18.34 |
0.368 |
9.35 |
| 3 1/2 |
88.9 |
15.50 |
14.63 |
21.79 |
0.449 |
11.40 |
| 3 1/2 |
88.9 |
15.50 |
14.63 |
21.79 |
0.449 |
11.40 |
| 4 |
101.6 |
14.00 |
12.93 |
19.26 |
0.330 |
8.38 |
| 4 1/2 |
114.3 |
13.75 |
12.24 |
18.23 |
0.271 |
6.88 |
| 4 1/2 |
114.3 |
16.60 |
14.98 |
22.31 |
0.337 |
8.56 |
| 4 1/2 |
114.3 |
20.00 |
18.69 |
27.84 |
0.430 |
10.92 |
| 5 |
127.0 |
16.25 |
14.87 |
22.15 |
0.296 |
7.52 |
| 5 |
127.0 |
19.50 |
17.93 |
26.71 |
0.362 |
9.19 |
| 5 |
127.0 |
19.50 |
17.93 |
26.71 |
0.362 |
9.19 |
| 5 |
127.0 |
25.60 |
24.03 |
35.79 |
0.500 |
12.70 |
| 5 |
127.0 |
25.60 |
24.03 |
35.79 |
0.500 |
12.70 |
| 5 1/2 |
139.7 |
21.90 |
19.81 |
29.51 |
0.361 |
9.17 |
| 5 1/2 |
139.7 |
24.70 |
22.54 |
33.57 |
0.415 |
10.54 |
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