... s requirements4. The impregnated shoes are available in either the VV profile or flat face5. ... life Impregnated casing shoes can be manufactured in all series and varying impregnation heights Surface-set Casing ... shoes are used in various overbruden formations.Size Available:Q Series: BQ, NQ, HQ, PQW Series: RW, EW, ... , HWT, PWT, BWS, NWS, HT, PT, SZMetric Series: 46, 56, 66, 76, 86, 101, 116, 131, ...