Under-reaming System – PCON
The Pneumec P-CON under-reaming system is specially designed to drill and case a hole through unstabled ground conditions for large diameter casings from 323mm up to 813mm diameter. The P-CON is characterized by its concentric design that incorporates a full face pilot bit together with three independent reamers. Its design revolutionizes system performance in difficult overburden drilling. The pilot bit drills through the loose formation and the reamers behind simultaneously widens the hole sufficiently for the casing to slide down. This two-stage drilling concept greatly increases the penetration rates and is particularly efficient in hard abrasive and decomposed rock conditions.
|
PES UNDERREAMERS’ CHOICES |
|
MODEL |
DRILLING DIA. |
RETRACTED DIA. |
CASING |
SHANK TYPE |
|
|
O.D. |
I.D. |
||||
| P-CON 280 |
345MM |
280MM |
323MM |
302MM |
SD-10 |
| P-CON 365 |
432MM |
364MM |
406MM |
387MM |
SD12, N125 |
| P-CON 460 |
530MM |
460MM |
508MM |
483MM |
N125, N180 |
| P-CON 510 |
580MM |
509MM |
559MM |
533MM |
N180 |
| P-CON 560 |
635MM |
560MM |
610MM |
584MM |
N180, N240 |
| P-CON 610 |
685MM |
600MM |
660MM |
632MM |
N240 |
| P-CON 660 |
735MM |
656MM |
711MM |
685MM |
N240 |
| P-CON 745 |
838MM |
745MM |
813MM |
780MM |
N240 |
