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Robit Drilling Systems

Robit Water Well Products

Water and Thermal Well Drilling
Casing drilling is used to make water and thermal wells in broken overburden conditions. Robit® Casing Systems allow easy driving of the casing tubes into the ground with relatively low torgue demand. The casing is left in the ground as a protection pipe for the water or thermal well. The Robit® Casing System used most often in water and thermal well drilling is DTH-RoX+.

         Robit System


 

Locking System

Robit® Patented Spiral Locking System

1. Drive the pilot bit through the casing tube.

2. Rotate to locked position in the ring bit.

3. Robit® Casing System is READY TO DRILL.


4. Finish drilling by rotating the pilot bit in the opposite direction and pulling it out.



Drilling with a DTH Casing System

  1. Pulldown/Feed Force: Moderate pulldown force on the pilot is 500 lbs/inch.
  2. Rotation Speed: Normal operating RPM is 7620/ring bit OD in mm (see chart 1.)
  3. Compressor Pressure: Normal operating pressure is from 180 to 225 psi.
    Note: in loose formation (i.e. sand) compressor can be set to 100 psi.
  4. Flushing: Drill exhaust air passes through the bit to clean the bit face and carry cuttings to the surface up the annular space between the drill pipe and the casing tube.

Robit® Available Shank Types

Casing Shanks   Casing Shanks
4.5" DHD 3.5   14" DHD 112, QL 120, SD-10/12, N120/125
5" DHD 3.5, DHD 340, TD 40   16" DHD 112, QL 120, SD-10/12, N120/125
5.5" DHD 340, QL 40, SD-4, COP 42/44, TD 40   18" DHD 112, QL 120, SD-10/12, N120/125
6" DHD 340, QL 40, SD-4, COP 42/44, TD 40   20" DHD 112S, QL 120/200, SD-15/18, N125/180
6.625" DHD 350, QL 50, SD-5, COP 52/54   22" DHD 112S, QL 120/200, SD-15/18, N180
7" DHD 350, QL 50, SD-5, COP 52/54   24" QL 200, SD-18, N180
7.625" DHD 360, QL 60, SD-6   26" QL 200, SD-18, N180/240
8.625" DHD 360, QL 60, SD-6   28" QL 200S, SD-18, N180/240
9.625" DHD 360/380, QL 60/80, SD-6/8   30" QL 200S, SD-18, N180/240
10" DHD 380, QL 80, SD-8   32" QL 200S, N180/240
10.5" DHD 380, QL 80, SD-8   36" QL 200S, N180/240/330
10.75" DHD 380, QL 80, SD-8   40" QL 300, N240/330
12.75" DHD 380, QL 80, SD-8/10, N125   48" N240/330, SS30

Robit® DTH-RoX+ and ++


Single-Use System for Down the Hole Hammer: Overburden is sometimes thick and full of boulders. Robit® Single-Use Casing System for DTH Hammers enables an easy, fast, and reliable drilling process in all conditions. Robit® Single-Use Casing Systems are available for all common Down The Hole hammers and are designed for all applications where casing is left in the ground:

  • Water well drilling (+, ++: ring bit ID optimized)
  • Thermal well drilling (+, ++: ring bit ID)

Robit System

DTH-RoX+
Casing
OD
Casing
Max Wall
Ring Bit
ID
Ring Bit
OD
Pilot Bit
OD
Hammer
Size
Product Number
Order Code
4.5"
0.197"
3.583"
5.039"
4.016"
3.5"
03-531-114-0148
DTH-RoX+ 114,3/5
5.5"
0.22"
4.567"
6.063"
5.02"
4"
03-541-139-0159
DTH-RoX++ 139,7/5,6
6.625"
0.236"
5.591"
7.244"
6.102"
5"
03-551-168-2396
DTH-RoX++ 168,3/6
7"
0.272"
6.043"
7.677"
6.378"
6"
03-562-177-0227
DTH-RoX+ 177,8/6,9
7.875"
0.236"
6.575"
8.346"
7.087"
6"
03-562-193-2763
DTH-RoX++ 193,7/6
8.875"
0.236'
7.323"
9.213"
8.071"
6"
03-562-219-0238
DTH-RoX+ 219,1/6
10.75"
0.315"
9.134"
11.496"
10.039"
8"
03-581-273-0252
DTH-RoX+ 273/8
12.75"
0.315"
11.063"
13.504"
12.047"
8"
03-583-323-0259
DTH-RoX+ 323,9/8

DTH-RoX+
Casing
OD
Casing
Max Wall
Ring Bit
ID
Ring Bit
OD
Pilot Bit
OD
Hammer
Size
Product Number
Order Code
4.5"
0.394"
3.071"
4.882"
3.642"
3"
03-531-114-0151
DTH-RoX+ 114,3/10
5.5"
0.394"
3.701"
5.906"
4.626"
4"
03-541-139-0164
DTH-RoX+ 139,7/10
6.875"
0.5"
4.764"
7.008"
5.512"
5"
03-551-168-0196
DTH-RoX+ 168,3/12,7
7.875"
0.5"
5.827"
7.992"
6.575"
6"
03-562-193-0233
DTH-RoX+ 193,7/12,7
8.875"
0.5"
6.575"
9.213"
7.52"
6"
03-562-219-0242
DTH-RoX+ 219,1/12,7
9.875"
0.5"
7.638"
10.236"
8.504"
6"
03-561-244-2769
DTH-RoX+ 244,5/12,7
10.75"
0.5"
8.622"
11.496"
9.685"
8"
03-581-273-0255
DTH-RoX+ 273/12,7
12.75"
0.5"
10.63"
13.465"
11.693"
8"-10"
03-581-323-0260
DTH-RoX+ 323,9/12,7
14"
0.5"
11.102"
14.449"
12.717"
8"-12"
03-581-355-0263
DTH-RoX+ 355,6/12,7
16"
0.5"
12.913"
16.496"
14.724"
10"-12"
03-581-406-0264
DTH-RoX+ 406,4/12,7
20"
0.591"
16.299"
20.512"
18.583"
12"-15"
03-523-508-0146
DTH-RoX+ 508,0/15
24"
0.63"
20.197"
24.488"
22.441"
18"
03-522-610-0144
DTH-RoX+ 609,6/16
28"
0.63"
25.197"
29.134"
26.457"
20"-24"
03-522-711-3995
DTH-RoX+ 711/16
32"
0.63"
28.15"
32.48"
30.512"
20"-24"
03-526-813-4231
DTH-RoX+ 813/16
36"
0.787"
31.693"
36.535"
33.976"
20"-24"
03-525-914-5142
DTH-RoX+ 914/20

Robit® DTH-RoX NS


Non-Stop System for Down the Hole Hammer: Robit® Non-Stop System is an advanced casing system that starts to drill with a casing and then continues beyond it without tool changes. No need to pull out the pilot bit and the drill string to replace it with a conventional down the hole bit. A single operation disconnects the pilot and the ring from the casing. Drilling can be continued free from the casing tube without losing drilling diameter. Robit® Non-Stop System can be used in various applications: Anchoring Piling Water and Thermal Well Drilling.

DTH-RoX NS
Casing OD
Casing Max Wall
Ring Bit ID
Ring Bit OD
Pilot Bit OD
Hammer Size
Product Number
Order Code
4.5"
0.394"
3.228"
4.882"
3.642"
3"
03-000-114-2380
DTH-RoX NS 114,3/10
5.5"
0.394"
4.094"
5.906"
4.567"
4"
03-000-139-0039
DTH-RoX NS 139,7/10
6"
0.5"
4.488"
6.299"
4.961"
4"
03-000-152-0040
DTH-RoX NS 152,4/12,7
7"
0.394"
5.591"
7.52"
5.984"
5"
03-000-177-0041
DTH-RoX NS 177,8/10
8.875"
0.236"
7.323"
9.173"
7.756"
6"
03-000-219-4535
DTH-RoX NS 219,1/6