What Is Rock Drill Rods And The Differences
Rock drill rod?is a special tool that used in mining, construction, geological exploration and other fields?by cooperating with rock drill and drill bit. The main function of the drill rod is to transmit the impact force and torque of the rock drill to the drill bit. So that the drill bit can break the rock and form a hole.
How many types rock drill rods?
Types
The drill rods have many types according to their using applications. Like top hammer drill rod,DTH drill rod and tapered drill rod.
?Differences
1. Down-the-Hole Drill Rod
Working Principle:?The principle of?DTH?drilling is to drive the down-the-hole hammer with high-pressure air, The impact force acts directly on the the drill bit.?so compared with other operation methods, it is more efficient, less noisy, and the hole is straighter.
Applications: Applicable to deep hole drilling operations, such as geological exploration, water well drilling and oil drilling.?he hole depth can reach hundreds of meters or even deeper.
Structural features:?The drill rod is relatively thick and hollow inside, used to transmit compressed air or hydraulic oil.?The connection method is usually a threaded join.
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1. Top Hammer Drill Rod
Working Principle:?The impact come from the?hydraulic rock drill, and the air compressor is only for dust removal and slag removal. The working principle?is basically same?as DTH drilling, but the impact force is applied in different positions. The impact force of the top hammer comes from the piston in the rock drill, acting on the shank adapter and transmitted to the drill bit through the drill pipe.
Scope of Application:?Applicable to medium and shallow hole drilling operations, such as tunnel excavation, mining and construction projects.?The hole depth is generally within tens of meters.
Structural Features:?Threaded joints are usually used for easy connection and disassembly.
?2. Tapered Drill Rod
Working Principle:The drill rod match the drill bit through a taper, and the drill bi drill the rock?by impact force and rotational force.?
Scope of application:It is suitable for shallow hole rock drilling operations, such as small-scale mining and geological surveys.The hole depth is generally shallow, and it is mostly used for handheld rock drilling equipment.
Structural features:The end of the drill rod has a taper for connecting a tapered drill bit.?The design is simple and suitable for light rock drilling operations.
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