Reverse Circulation Hammer Mining

 

 

Reverse Circulation Hammer Mining is specialized drilling tools used for various applications in the field of geotechnical and geological exploration, mining, and environmental assessment. Their unique design allows for efficient drilling and sample retrieval from the subsurface

 

 

The Air Swivel of the Reverse Circulation Hammer Mining is a device used to control the supply and rotation of compressed air, which plays a key role in reverse circulation drilling. Air Swivel allows compressed air to enter the drill bit through the drill pipe while enabling the drill pipe to rotate, allowing for efficient reverse circulation drilling operations. Here are the details about Air Swivel:

 

Effect:

Compressed air supply: Air Swivel is responsible for delivering compressed air from an air compressor at the surface to the drill bit. This is a key component in the reverse circulation drilling process, as compressed air is used to cut rock or soil and transport cuttings to the surface.

 

Rotation transfer: In addition to supplying compressed air, the Air Swivel also allows the drill pipe to rotate while drilling. This is an important function to ensure that the drill bit cuts through the rock or soil evenly as it drills.

 

Working principle:

Compressed Air Delivery: Compressed air is delivered to the Air Swivel via pipes from an air compressor at the surface. Air Swivel typically includes an air channel that delivers air to the drill pipe.

 

Rotation transmission: Air Swivel has a rotation transmission mechanism, which allows the drill pipe to rotate under the action of compressed air. This ensures that the drill bit rotates as it drills to effectively cut through the rock or soil.

 

Cutting and cuttings transportation: Compressed air enters the drill bit through the Air Swivel, creating high-speed airflow. This airflow is directed at the drill's nozzle, cutting and breaking up the rock or soil. At the same time, the cuttings are expelled from the nozzle and transported to the inside of the drill pipe along with the air.

 

Reverse circulation flow: The inner drill pipe and the outer drill pipe are used to transport cuttings and air respectively. Air Swivel ensures that cuttings and air enter the correct channels respectively, thereby achieving counter-circulation flow.

 

Advantage:

The use of Air Swivel allows efficient cuttings and airflow in reverse circulation drilling, ensuring high-quality sample recovery and high-speed drilling.
It reduces cuttings contamination because the cuttings are transported in internal pipes and do not come into contact with the surface.
The design of Air Swivel allows the drill pipe to remain stable and rotate during drilling, improving drilling efficiency.