JUCON - Casing Advancement System

'with wings retracted'
'with wings extended'

Concentric Drilling
d
d

Since the wings extend and retract concentrically, they will drill and maintain a round hole.
The JUCON system has no tendency to wander, or to produce an offset.
This feature assures such a straight round hole as one drilled with a conventional bit.
High Drilling Efficiency
d
d

The design of the JUCON system enables the guide to perform most of drilling directly
while the extended wings perform reaming.
This minimizes loss of hammer energy and maintains high drilling efficiency.
Easily Retractable
d

After drilling to the required depth, the wings get retracted by rotating in the reverse
direction as the guide gets lifted.

for Φ190.7mm to Φ1,066.8mm Casings


Model
No. of Wings
Wing Gauge
Applicable Casing
Guide
Shank Type
Extended
D1 (mm).
Retracted (mm).
Max. O.D.
D2 (mm).
Min. I.D. D3(mm).
Nominal Size (in.)
O.D. 
D4(mm)
#160
2
214
155
190.7
174.7
7"
157
 SD5, DHD350R
#190
3
230
181
216.3
200.3
8"
183
 SD6, DHD360
#240
3
286
232
267.4
249.4
10"
234
 SD8, DHD380
#280
4
336
277
318.5
297.3
12"
279
 SD10,N100
#315
4
373
318
355.6
336.6
14"
320
 SD12, DHD112, N120
#365
4
425
363
406.4
387.4
16"
365
 SD12, DHD112, N120
#410
4
478
412
457.2
435.0
18"
414
 SD15
#460
4
530
461
508.0
482.6
20"
463
 SD15, SD18, N180
#510
4
580
509
558.8
533.4
22"
511
 SD18,N180,JT380,JT415
#560
4
630
559
609.6
584.2
24"
561
 SD18,N180,JT415,JT490
#600
4
685
600
660.4
631.8
26"
603
 N240, JT490, JT520
#660
4
737
654
711.2
683.2
28"
656
 N240, JT490, JT520
#710
4
784
699
758.0
730.0
30"
701
 N240, JT520, JT610
#750
4
838
750
812.8
787.4
32"
752
 N240, JT520, JT610
#810
4
886
797
858.0
826.0
34"
799
 N240, JT610, JT700
#860
4
945
856
914.4
886.4
36"
858
 N240, JT610, JT700
#900
4
995
906
965.2
937.2
38"
908
 JT610, JT700
#960
4
1050
954
1016.0
984.0
40"
956
 JT610, JT700
#1010
4
1100
1002
1066.8
1034.0
42"
1004
 JT700, JT800
#1160
4
1275
1155
1246.0
1214.0
49"
1157
 JT700, JT800, JT900
In accordance with our policy of constant improvement of the products, we reserve the right to amend design, materials and specifications at any time without notice.

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