Tricone Drill Bit IADC745 9 7/8" 250mm durable For Soft To Very
Hard Formations
Application
IADC745 series apply for the soft formation TCI tricone bits are
used to drill low compressive strength, very soft formations. This
bit maximized to use of both conical and chisel tungsten carbide
inserts of large diameters and high projection. This cutting
structure design, combined with maximum cone offset, results in
high bit penetration rates. The deep intermesh of cutter rows
prevents bit bailing in sticky formations.
Mining Drill Bit is the best all-purpose drill bit and can be used for many
different types of rock formations, such as Soft Rock Formations
(consist mainly of sand, clay, limestone or shale), Medium Rock
Formations (calcites, dolomites, hard limestones, and some hard
shale), Hard and Abrasive Formation (hard shale, calcites,
mudstones, chert, pyrite, granite, quartzite, and cherty lime
stones).
Common fault analysis of Tricone bits
| Common fault | Fault description | Method |
| Early wear of the shirttail | Abrasive formations, bent drill rod, seriously worn stabilizer and
insufficient air for drilling rate attained etc, are all the causes
which result in premature shirttail wear. In this case, the
configuration of cones is good and the amount of inserts wear is
small. Shairttail wear can also allow the big roller bearings to
fall out resulting in bit failure. | The designer should strength the shirttail with certain measures to
increase the wear-resistance capacity of shirttails. |
| Early wear and loose movement of the bearing | Excessive weight on bit, insufficent air to clean the hole and/or
cool the bearing, leads to bearings overheating due to improper
cooling and poor cuttings removal can shorten the service life of
bit bearing. | Reduce bit pressure and increase air pressure |
| Cutting structure failure | Excessive WOB or Rotation speed; Wrong bit selection; Cuttings
blowing in bad conditions caused repeating crushing. | Correctly select operating parameters and rotary types for specific
working conditions |
Advantage:
High quality----strictly act according to the ISO9001 standard, and all bits
are manufactured according to strict standards, set forth by the
American Petroleum Institute (API).
We mainly provide Tricone Bits(TCI Drill Bits) for open pit mining.
a). Type: Tungsten Carbide Insert (TCI)
b). Formation Application: Soft to Hard Formation
c). Size Available: 7 7/8''~26''
d). Popular IADC Code: IADC545,645,725,735,745,825,835
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