Product DescriptionA.Drill in overburden unstable rockB.One step to
drill and follow casingC.Flexible to open or close 1. When
drilling starts, the pilot bit drives the casing shoe and
casing tube. 2. When reaching the bedrock, reverse
rotation of the tools and pull the pilot bit out from the
hole. 3. Pour in concrete or move to the next
construction procedure. 4. Use conventional
tools to drill to the desired depth. Concentric Overburden
Drilling System With RingsOverburden drilling systems are widely
used in a variety of applications from well drilling and
minipilling to rock anchoring and site investigation. This is
easily removed to allow for bit are sharpening or
replacement. It is the most economical solutions because its
ingenious reaming wing the bit is retrievable can be used at the
next hole.>>The casing shoe is welded to the casing.
>>The pilot bit and ring bit are locked together by the
bayonet coupling. They drill a hole large enough to allow the
casing to be pulled into the hole. >>The pilot bit and
ring bit rotate with the drill string while the casing shoe and
casing do not rotate. >>When required depth is reached,
the pilot bit is unlocked by a slight reverse rotation of the drill
string. >>The drill string and pilot bit will be
retrieved through the casing, the ring bits and casing shoe will be
left in the hole for permanent casing system. Product
Parameters Model Outer Dia. of Casing Tube(mm) Inner Dia. of Casing
Tube(mm) Wall thickness of casing(mm) Guide device Max. Outer
Dia(mm) Reamed Dia(mm) Max. Outer Dia. of Normal Bit GL360-219 219
119 10 197 234 185 GL380-245 245 225 10 222 260 210 GL380-273 273
253 10 251 305 240 GL380-325 325 305 10 302 350 282 GL112-355 355
325 10 322 380 305 GL112-406 406 382 12 380 432 365 Detailed
PhotosFeature 1. Deal with straight, oblique hole and other
angle holes2. Hardening treatment of the part's surface:with longer
operating life and excellent anti-wear properties3. High grade
tungsten carbide inserts Related product-Middle-low/high air
pressure DTH hammers & bits-Big hole high air pressure DTH hammer
using in water well, oil, gas and construction drilling.-Eccentric
overburden drilling system-Hole opener bit-Shank adapter, coupling
sleeves and all kinds of adapters Company
Profile Glorytek Industry (Beijing)Co.,Ltd.,Located in
Beijing,China, is an integrated corporation specialized in
manufacturing and exporting top quality drilling equipment and
drilling parts for decades. We are supported and assisted by a
highly experienced team of designers and engineers that enable us
to complete all the assigned projects successfully as per the
specified requirement from our clients. Our products are
widely used in the scope of mining, water well drilling and
exploration, anchor grouting project, side slope protection
engineering, oil and gas engineering,underwater rock drilling &
blasting operations of seaport channel, hydropower project,
national defense projects ect./* January 22, 2024 19:08:37
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