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OVERBURDEN ADVANTAGES
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กแ Down-hole casing keeps formation from collapsing making well
installation easier.
กแ No drilling fluids required.
กแ System works with Hollow Stem Auger rigs resulting in cost
savings compared to larger air rotary rigs.
กแ Reduced drilling time vs. conventional mud rotary systems.
กแ Temporary isolation from upper water bearing formations.
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MODEL |
SIZE |
TYPE |
BIT-DIAMETER (mm)
EXTENDED RETRACTED
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SHOULDER
DIA.(mm)
|
OVER
CUT(mm) |
CASING SIZE (mm) |
SUITABLE
HAMMER TYPE |
I.D. |
O.D. |
WALL |
NEX-6B |
140 |
2WINGS |
190.5 |
141 |
150.8 |
11.1 |
155.2 |
168.2 |
6.5 |
IR340,SD4 |
NEX-7B |
165 |
2WINGS |
222.2 |
167 |
176.2 |
14.3 |
178.4 |
193.6 |
7.6 |
IR360,SD6 |
NEX-8B |
190 |
3WINGS |
254 |
189 |
201.6 |
17.5 |
203.8 |
219 |
7.6 |
IR360,SD6 |
NEX-9B |
215 |
3WINGS |
279.4 |
219 |
235 |
12.7 |
241.2 |
254 |
6.4 |
IR380,SD8 |
NEX-10B |
240 |
3WINGS |
311.1 |
235 |
251.2 |
19 |
254.6 |
273 |
9.2 |
IR380,SD8 |
NEX-12B |
280 |
3WINGS |
335 |
281.5 |
299 |
8.3 |
305.7 |
318.5 |
6.4 |
IR310,SD10 |
NEX-14B |
320 |
3WINGS |
373 |
320 |
333 |
8.7 |
336.6 |
355.6 |
9.5 |
IR112,SD12 |
NEX-16B |
365 |
3WINGS |
425 |
363 |
384 |
9.3 |
387.4 |
406.4 |
9.5 |
IR112,SD12 |
NEX-18B |
410 |
3WINGS |
478 |
410 |
432 |
10.4 |
435 |
457.2 |
11.1 |
IR112,SD12 |
NEX-20B |
460 |
3WINGS |
530 |
455 |
480 |
11 |
482.6 |
508 |
12.7 |
SD18,N180 |
NEX-22B |
510 |
4WINGS |
581 |
506 |
520 |
11.1 |
533.4 |
558.8 |
12.7 |
SD18,N180 |
NEX-24B |
560 |
4WINGS |
632 |
557 |
581 |
11.2 |
584.2 |
609.6 |
12.7 |
SD18,N180 |
NEX-26B |
610 |
4WINGS |
685 |
603 |
631 |
12.3 |
635 |
660.4 |
12.7 |
SD24,N240 |
NEX-28B |
660 |
4WINGS |
737 |
652 |
682 |
12.9 |
685.8 |
711.2 |
12.7 |
SD24,N240 |
NEX-30B |
710 |
4WINGS |
784 |
706 |
733 |
11 |
736.6 |
762 |
12.7 |
SD24,N240 |
NEX-32B |
750 |
4WINGS |
850 |
748 |
782 |
18.6 |
787.4 |
812.8 |
12.7 |
SD24,N240 |
NEX-34B |
810 |
4WINGS |
886 |
808 |
834 |
11.2 |
838.2 |
863.6 |
12.7 |
N300 |
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