• Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling
  • Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling
  • Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling
  • Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling
  • Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling
  • Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling

Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling

Standard: RoHS, AISI, API
Usage: Oil Mining, Coal Mining, Well Drilling, Ore Mining
Material: Carbon Steel
Transport Package: Wooden Box
Specification: RC Drill Pipe
Trademark: ROSCHEN
Customization:
Gold Member Since 2017

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Manufacturer/Factory

Basic Info.

Model NO.
6 5/8", 10 3/4"
Origin
China
HS Code
84314320
Production Capacity
10000

Product Description

Reverse Circulation drill rod or drill pipe
 
Reverse Circulation drilling, or RC drilling, uses rods with inner and outer tubes, the drill cuttings are returned to surface inside the rods. The drilling mechanism is a pneumatic reciprocating piston known as a hammer driving a tungsten-steel drill bit.
 
The reverse circulation drill rod has four threads which adds to machine operating time. The purpose of the two extra threads is to allow the inner tube to be replaced in the field. It also allows the driller to replace the box tool joint with a new tool joint, without welding and can be done at the site. - We use heat threaded 4130 alloy tool joints; this alloy allows driller to employ a hard facing program without fear of embitterment. We use a micro-alloy midsection (mid-body), ST52V, 90KS1 MIL VLD possessing a superior abrasion resistance. - Our inner tube midsection (mid-body) is a heavy-wall mechanical tube, not a pipe. The inner tube is fixed and won't vibrate under most conditions. The inner tube ends are made from a heat treated alloy and the male end is machine finished after welding for perfect alignment. - The o-ring retainers absorb the percussion forces to eliminate problems arising from the transfer of vibration and torque loads to the outer pipe.
 
Reverse circulation drill pipe/Double wall drill pipe/Dual Wall drill pipe
Outer tube           O/D in Inner tube  in Lerngth  m Type of thread Range of drill               in
3 1/2 1 1/2 3 ~ 6 Remet, Metzke, Matrix, others 4-1/8-4-3/4
4 2 3 ~ 6 Remet, Metzke, Matrix, others 4-3/4-5-1/2
4 1/2 2 & 2-1/2 3 ~ 6 Remet, Metzke, Matrix, others 5-1/8-6
6 5/8 3 3 ~ 6 Remet, Metzke, Matrix, others 7-7/8-15
10 3/4 5 3 ~ 6 Remet, Metzke, Matrix, others Over 15
* Roschen offers reverse circulation drill string components in accordance with the requirements of the customer. Reverse circulation drill pipes available in different model, diameters and length.

Double Wall Drill Pipe (Rod) for Reverse Circulation (RC) Hammers Re542 Re543 Re545 RC Hammer Drilling

 
REVERSE CIRCULATION DRILL ROD SPECIFICATIONS
               
Type  / Thread  Remet  Remet  Remet  Metzke  Metzke Matrix  Matrix
Rod O.D. 3 1/2" 4" 4 1/2" 4" 4 1/2" 4" 4 1/2"
Outer tube O.D. 88.9mm 101.7mm 114.3mm 101.7mm 114.3mm 101.7mm 114.3mm
Outer tube I.D. 81.8mm 94.6mm 107.2mm 94.6mm 107.2mm 94.6mm 107.2mm
Outer tube WT 5.3mm 7.1mm 7.1mm 7.1mm 7.1mm 7.1mm 7.1mm
Inner tube O.D. 38.1mm 50.8mm 63.5mm 50.8mm 63.5mm 50.8mm 63.5mm
Inner tube I.D. 32.6mm 45.3mm 58mm 45.3mm 58mm 45.3mm 58mm
Inner tube WT 5.5mm 5.5mm 5.5mm 5.5mm 5.5mm 5.5mm 5.5mm
Spanner Flat 90mm 90mm 90mm 90mm 90mm 90mm 90mm
Weight 3.0 m 77 kg. 77 kg. 97 kg. 77 kg. 97 kg. 77 kg. 97 kg.
Weight 6.0 m 125 kg. 155 kg. 172 kg. 155 kg. 172 kg. 155 kg. 172 kg.
   
  Reverse circulation is achieved by blowing air down the annulus of the rod, the differential pressure creating air lift of the water and cuttings up the inner tube which is inside each rod. It reaches the deflector box at the top of the drill string then moves through a sample hose which is attached to the top of the cyclone.
 
The drill cuttings travel around the inside of the cyclone until they fall through an opening at the bottom and are collected in a sample bag. For any drill hole there will be a large number of sample bags, each one marked to record the location and drilling depth that the sample was obtained.
 
The collected series of sample bag cuttings are later taken for analysis to determine the mineral composition of the drill hole. The analysis results of each individual bag represents the mineral composition at a particular sample point in the drill hole. Geologists can then survey the drilled ground analysis and make decisions about the value of the overall mineral deposit.

 
     
 

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