IADC 417/427/437 120mm API 2 7/8 Well Drilling Drill Bit For Soft
Formation
| IADC | WOB (KN/MM) | RPM (r / min ) | Applicable formations | Diameter | API | Weight |
417/427 /437 | 0.35~0.9 | 140~70 | Low compressive strength, high drill-ability and extremely soft
formation, like shale,
clay,sandstone,
conglomerate etc | 120mm/
4 3/4" | 2 7/8 | 7kg |
TCI Tricone bits offer a variety of carbide inserts such as
spherically shaped inserts for very hard rock or conically shaped
inserts for softer rock. The number of rows of inserts is directly
related to the type of application and the size of hole to be
drilled. There are also open and sealed bearings available as well
as three types of shirttail protection to choose from. Finally,
Focus rotary bits can use both fluid and air circulation.
Advantages
1.Tungsten carbide shapes and grades matched to your conditions for
less wear and breakages.
2.Sealed journal bearings for industry-leading bit load capacity.
3.Advanced manufacturing techniques ensure optimal tool life and
performance
Structural features of tricone bit
1.Cutting structure this type tricone bits:
The durability of premium tungsten carbide insert is improved with
new formulas and new techniques
for insert bit.
2.Gauge structure this type tricone bits:
Multiple gaugeprotection with gauge trimmers on the heel of cone,
tungsten carbide inserts and
hardfacing on the shirttail increases gauge holding capability and bearing life.
3.Bearing structure of this type tricone bits:
High precision bearing with two thrust faces. Ball lock the cone.
Hardfaced head bearing surface.
Cone bearing inlaid with frictionreducing alloy and then silverplated. Abrasion
resistance and seizure resistance of the bearing are improved.
4.Seal and Lubrication of this type tricone bits:
Premium Oring, optimal seal compression and curved seal structure
can enhance the seal
performance.
5.Product Application this type tricone bits:
It can receive high WOB in the conventional drilling. It is
suitable for various formations by matching
cutting structure with different tooth shape, tooth density and tooth
exposure height.
| IADC | Applicable rormation | WOB
KN/mm | RPM
(r/min) |
| 116/117 | Low compressive strength, high drill-ability and extremely soft
formation, like soft shale, clay, salt rock, etc. | 0.35~0.90 | 180~80 |
| 126/127 | Low compressive strength, high drill-ability and soft formation,
like shale, clay, salt rock and soft limestone,etc. | 0.35~1.00 | 180~80 |
| 136/137 | Soft to medium soft with low compressive strength or soft with hard
interlayer, like anhydrite, soft limestone,sandstone, etc. | 0.35~1.05 | 130~60 |
| 216/217 | Medium hard formation with relatively high compressive strength and
hard interlaye, like hard shale,sandstone. limestone, etc. | 0.5~1.20 | 100~50 |
417/427/4
37 | Low compressive strength, high drill-ability and extremely soft
formation, like shale, clay, sandstone,conglomerate etc | 0.35~0.90 | 140~70 |
| 447 | Low compressive strength, high drill-ability and soft formation,
like shale, clay, sandstone, soft limestone,salt rock, plaster etc. | 0.37~1.00 | 140~60 |
| 517 | Low compressive strength, high drill-ability and soft formation,
like shale, clay, sandstone, soft limestone,salt rock, etc. | 0.37~1.05 | 120~50 |
| 527 | Soft formation with low compressive, like Low compressive strength,
high drill-ability and soft formation, like shale, clay, sandstone,
soft limestone, salt rock, anhydrite etc. | 0.35~1.05 | 120~50 |
| 537/547 | Low compressive strength,medium hard formation with hard abrasive
interlayer, like hard shale, anhydrite,soft limestone,
sandstone,dolomite with mezzanine, etc. | 0.50~1.05 | 110~40 |
| 617/627 | High compressive strength, medium hard and thick hard interlayer,
like hard shale, limestone, sandstone,dolomite, etc. | 0.50~1.05 | 80~40 |
| 637/737 | High compressive strength medium hard and high abrasive formation,
like limestone, dolomite, sandstone,chert, etc. | 0.70~1.20 | 70~40 |
