HA337 high, hard abrasive formations, such as the hard limestone, dolomite, sandstone, flint, etc Size and types availableSize: Common sizes, 6.6-1/ 2, 7-7/ 8, 9-7/ 8, 10-5/ 8, 12-1/ 4Various....
HEJIAN HUASEN petroleum supplies co , ltd .our company has many industry experts in research and manufacture of diamond bit , also with many technical staff familiar with drilling . The main....
HA317 high compressive strength, the hard and abrasive formations such as limestone, dolomite, sandstone, flint, etc Size and types availableSize: Common sizes, 6.6-1/ 2, 7-7/ 8, 9-7/ 8, 10-5/ 8, ....
HA216/ 217 Medium hardness, high compressive strength, and a hard interlayer, such as hard shale, sandstone, limestone, etc Size and types availableSize: Common sizes, 6.6-1/ 2, 7-7/ 8, 9-7/ 8, ....
HA136/ 137 Low compressive strength of soft to medium soft ground or soft rock formations in the hard laminated, such as anhydrite, soft limestone, sandstone, etc. Size and types availableSize: ....
FJ447G 1, Low compressive strength High drillability of soft ground, such as shale clay sandstone Soft limestone Rock salt Gypsum etc. 2, The inner row teeth is conical, The outer row....
FJ517G 1, Low compressive strength High drillability of soft ground, such as shale clay sandstone Soft limestone etc. 2, Large diameter deflection top spoon shaped inner row of teeth ....
FJ437 1, Low compressive strength High drillability of soft ground, such as shale clay sandstone Soft limestone Rock salt Gypsum etc 2, The inner row teeth is conical, The outer row....
HJ527 1, low compressive strength, high drillability very soft ground, such as shale, clay, sandstone, soft limestone, rock salt, gypsum, etc 2, cone and the cone back surface of all hard surface....