DTH REC

Robit® Overburden Eccentric System

Designed to offer maximum reliability in overburden drilling conditions
Enables driving the casing in all downward vertical directions/formations
Helps avoid collapsing holes and lost equipment
A two-piece bit, consisting of a concentric pilot bit and a swing-out eccentric reamer
Enlarges the hole’s diameter driving the casing down into the hole
Reamer can be retractred by applying reverse rotation
Full system can be pulled out and used again
Ideal for water well and geothermal drilling, micropiling, as well as dam and port projects

[ordercode]	[type]	[img]	*Casing OD [mm]	Casing OD [in.]	*Casing Max Wall [mm]	Casing Max Wall [in.]	Casing ID [mm]	Casing ID [in.]	Pilot bit [mm]	Pilot bit [in.]	Reamed diam. [mm]	Reamed diam. [in.]	Drill pipes [mm]	Drill pipes [in.]	*Hammer
=Pilots
DTH-REC 114.3-5	misc	/wp-content/uploads/2022/10/DTH-REC.png	114,3	4 ½	6,0	0.236	102,3	4.027	99,5	3.917	125,0	4.921	76	3	3"
DTH-REC 139.7-5.6	misc	/wp-content/uploads/2022/10/DTH-REC.png	139,7	5 ½	5,6	0.220	128,5	5.059	125,5	4.941	153,0	6.023	76 / 89	3 / 3½	4"
DTH-REC 168.3-6	misc	/wp-content/uploads/2022/10/DTH-REC.png	168,3	6 ⅝	5,6	0.220	157,1	6.185	154,0	6.063	185,0	7.283	89	3½	5"
DTH-REC 193.7-6	misc	/wp-content/uploads/2022/10/DTH-REC.png	193,7	7 ⅝	5,0	0.196	183,7	7.232	179,0	7.047	212,0	8.346	114	4½	6"
DTH-REC 219.1-6.3	misc	/wp-content/uploads/2022/10/DTH-REC.png	219,1	8 ⅝	6,3	0.248	206,5	8.129	203,0	7.992	238,0	9.370	114	4½	6"
DTH-REC 273-6.3	misc	/wp-content/uploads/2022/10/DTH-REC.png	273,0	10 ¾	6,3	0.248	260,4	10.251	255,0	10.039	307,0	12.086	139 / 168	5½ / 6½	8"