Double Wall Drill Pipes / Dual Tube Drill Pipe /Reverse Circulation Drill Pipe for Re542 Re543 Re545 Re547 RC Reverse Circulation DTH Hammer

• Standard: RoHS, CE, AISI, API
• Usage: Oil Mining, Coal Mining, Well Drilling, Ore Mining
• Material: Carbon Steel
• Transport Package: Wooden Box
• Specification: RC Drill Pipe
• Trademark: ROSCHEN
• Model NO.: 3 1/2~ 10 3/4
• Origin: China
• HS Code: 84314320
• Production Capacity: 10000

Product Description

 DOUBLE WALL DRILL PIPES
 

 
Dual Wall HDD Drill Pipe
 
Reverse Circulation RC Drilling Rods
 
Reverse Circulation RC Drilling Rods is also called Double wall drill pipe, double drill pipe or Dual Wall drill pipe. It consists of two layers of inner and outer drill pipes (called inner pipe and outer pipe). The inner and outer pipes constitute an annular gap, which is a channel for pumping the flushing medium to the bottom of the hole when hydraulic rock drilling and center sampling drilling. The central hole of the inner tube is fixed as a whole by discharging the flushing medium, and each double-walled drill pipe is connected with the screw of the outer tube to ensure transmission of torque and pressure. The inner tube is usually connected by a plug-in method, which generally only serves as a flushing medium. Therefore, a sealing device is required at the plug-in place.


Double Wall Drill Pipes are used in drilling of wells with diameter 84 and 93 mm and depth up to 300 m in soils of II-V drill ability classes with seams of soils up to VII drill ability class in the fulfilment of all necessary prospecting and geochemical operations, in geological mapping and exploration of deposits of solid minerals.
 
Drilling of wells is carried out with hydro-transport of the core delivered on the surface along the internal channel of the double drill string.

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.

 

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.