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SYMMETRIX N-SYSTEMS

The N-VERSION is primarily designed for applications where the same
ring set can be used several times over. Casing pipe is retrieved together with ring set. The N-system suits also for thick wall casing pipes.

- N-type pilot bit
- N-type multi-use ring set, ring bit and casing shoe are connected
by strong mechanical interlocking

SPECIFICATIONS:

SYSTEM CASING CASING RING BIT RING BIT RING BIT DTH-
OD WALL MAX ID OD OD HAMMER

N58               88,9             8,0                    58                 96               71
N69               101,6           8,0                    70                 110             83          3"
N82               114,3           8,0                    82                 122             95          3"
N95               127,0           10,0                  95                 136             105        4"
N98               133,4           10,0                  98                 141             111        4"
N104            139,7           10,0                  104               147             116        4" - 5"
N116             152,4           10,0                  116               160             130        5"
N131             168,3           10,0                  132               178             146        5"
N141            177,8           10,0                  141               188             155        6"
N154            193,7           12,0                  154               204             168        6"

N175             219,1           12,0                  175               229             193        6"
N200             244,5           12,0                  200               256             218        6" - 8"
N207             254,0           12,7                  207               267             226        6" - 8"
N220             267,0           12,7                  220               280             239        8 "
N226             273,0           12,7                  226               286             245        8"
N273             323,9           12,7                  273               338             293        8" - 12"
N306             355,6           12,7                  305               370             325       10" - 12"

N352             406,4           15,0                  352               423             373      10" - 12"
N364             419,0           15,0                  364               434             385       10" - 12"
N398             457,2           15,0                  398               475             423       12" - 16"
N444             508,0           15,0                  444               526             474       12" - 18"
N492             558,8           15,0                  493               578             524       12" - 20"
N544             609,6           15,0                  544               630             575       16" - 20"
N592             660,4           15,0                  592               681             626       16" - 20"
N642             711,2           15,0                  642               733             677       16" - 20"

N692             762,0           15,0                  692               784             727       18" - 24 "
N740             812,8           15,0                  740               833             777       18" - 24"
N790             863,2           15,0                  790               884             828       18" - 24"
N838             914,4           15,0                  838               935             878       20" - 30"

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