Down-The-Hole(DTH) Drill Pipes
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Down-The-Hole(DTH) Drill Pipes
Down-The-Hole(DTH) Drill Pipes
Down-The-Hole(DTH) Drill Pipes
Down-The-Hole(DTH) Drill Pipes
Down-The-Hole(DTH) Drill Pipes

Down-The-Hole(DTH) Drill Pipes

DTH drill pipes are usually used with DTH hammers and DTH drill bits in the fields of open-pit mining, quarrying and construction projects.

Customized
Outsize:
60 / 76 / 89 / 102 / 114 / 127 / 140 / 159 / 194mm etc
Thread Type:
API REG/NC(IF)/Beco
Wall thickness:
5.5 / 6.5 / 7.5 / 8.5 / 10mm etc
Length
1-6m

Down-The-Hole(DTH) Drill Pipes

DTH drill pipes are the mechanism to transmit impact force and rotation torque to DTH hammers and bits, as well as offer a pass for the airflow.

In principle, the lighter the rod is, the better it is for the drilling operation. So a thinner one is always preferable to a thicker one if other parameters were the same. While in the meantime, the yield strength and the tensile strength must also be taken into account, which means relatively rod wall thickness would be needed to obtain enough strength. Of course, once the thickness is rigidly requested as thin as possible to minimize the drill string weight, there is also another method to get optimum drill tubes that use better grade steels.

We has DTH drill pipes with several different thickness designs for each diameter, made from different grade steels for selection. So, in the practice of field drilling, under different conditions, there may be in need for different kinds of drill pipes for a particular application. For example, the thicker ones with general high-quality grade steel for drilling holes of average depth, such as blasting holes; and the tinner ones with better grade steel for drilling holes of very deep, such as drilling for ground thermal. 

Thread Type

Model

API REG

2 3/8 API REG / 2 7/8 API REG / 3 1/2 API REG / 4 1/2 API REG / 5 1/2 API REG / 6 5/8 API REG

NC(IF)

NC23 / NC26(2 3/8 API IF) / NC31(2 7/8 API IF) / NC3/ NC38(3 1/2 API IF) / NC40 / NC46 / NC50(4 1/4 API IF)

Beco

3 / 3 ½ / 4 / 4 ½ / 5 ¼ / 6 / 8 / 10 BECO

Features

Standard API thread forming and orientating are processed in one step, which is our technical highlight.

Each processing step is stringently controlled, all Rarcs are CNC machined.

Not all friction welding is strong, after a specialized friction welding process, welding outcome can be ensured.

Premium alloy steel-made joints, strictly controlled heat treatment process, and standard API thread processing technology; We pay high attention to all these easily ignored details to ensure pipe stability and thread durability.

Hardness and wear resistance combined alloy steel, supplied by national top-level special steel manufacturer. (Pipe thickness and material can be users' choice)

Pipe curvature correction is a must process for each drill pipe.


Parameters:

The API DTH drill pipe comes in various sizes and specifications, depending on the type of drilling operation. Some common parameters that are used to measure the effectiveness and performance of drill pipes include outer diameter, inner diameter, length, weight, and material grade.

Rod dia(mm) Rod Length(mm) Thickness(mm) Connect Thread Wrench Flats(mm)
inch mm
3 76 1000-6000 5 API2 3/8”REG 57/64.5
3 76 1000-9000 8 API2 3/8”REG 57/64.5
3 1/2 89 1000-6000 6 API2 3/8”REG 70/64
3 1/2 89 1000-9600 8 API2 3/8”REG 70/64
4 102 1000-9000 10 API2 3/7”REG 76/89
4 1/2 114 1500-7620 6 API3 1/2”REG 89/95
4 1/2 114 1500-9140 8 API3 1/2”REG 89/95
4 1/2 114 1500-9140 10 API3 1/2”REG 89/95
4 1/2 114 1500-9140 18 API3 1/2”REG 89/95
5 127 1500-9500 12 API3 1/2”REG 89
5 127 1500-9500 14 API3 1/2”REG 89
5 127 1500-9500 18 API3 1/2”REG 89
5 1/2 140 1500-9500 9 API4 1/2”REG or 4’FH 114
5 1/2 140 1500-9500 10 API4 1/2”REG or 4’FH 114
5 1/2 140 1500-9500 12 API4 1/2”REG or 4’FH 114

Note:

1.Thread options include all standard API REG,IF and FH profiles. 2.Wall thickness and thread type can be your choice.

Five general types of DTH pipe:

1.DTH Light-weight Drill Pipe ↓


2.Standard Flush Joint Drill Pipe 


3.Design group Atlas Copco Roc F6/L6/L8 


4.Design group CM(CM760/780) 


5.SW DB 165 Series Drill Pipe 




DTH drill pipe adapters

DTH drill pipe adapters are generally divided into male- male, female-female and male-female . 

Or:Box-Pin adapters,Pin-Pin adapters,Box-Box adapters.

Box-Pin AdaptersPin-Pin AdaptersBox-Box Adapters
API 2 3/8" REGAPI 2 3/8" REGAPI 2 3/8" REG
API 2 3/8" IFAPI 2 3/8" IFAPI 2 3/8" IF
API 2 7/8" REGAPI 2 7/8" REGAPI 2 7/8" REG
API 3 1/2" REGAPI 3 1/2" REGAPI 3 1/2" REG
API 4 1/2" REGAPI 4 1/2" REGAPI 4 1/2" REG
NC26NC26NC26
NC31NC31
NC31
NC35NC35NC35
NC38NC38NC38
F48F48F48


Wrench for drill pipes


Finished product preview



Packing

Using ply-wooden cases and pallet for package to protect the products and avoid the damaging during transportation. Also we can customize package according to your special requests.


We're well-known as one of the leading dth drill tools manufacturers and suppliers in China. Please feel free to buy high quality dth drill pipes at competitive price from our factory. Good service and punctual delivery are available.


Our advantage:
1. Enterprise group combines manufacture and international trade;
2. Strict quality controll system with perfect equipment;
3. High technology enterprise with advanced production equipments;
4. Prompt delivery and all-around after-sales service;

FAQ
A: Are you trading company or manufacturer ?
Q: We are manufacturer.

A: Do you provide samples ?
Q: Yes, of course. We welcome sample order to test and check quality.

A: Can you accept small orders?
Q: We enjoy to cooperate with all clients whatever big or small order.

A: Could you accept OEM & ODM?
Q: Of course, as a manufacturer, OEM & ODM is available, our professional R&D center can help you on the project.

A: How long is your delivery time?
Q: Usually it's about 20 days,depends on your actual quantity.
Any question, pls feel free to contact . Thanks!

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