Metal Face Sealed Bearing TCI Tricone Bit for Rotary Rock Blasting / Water Well Drilling
Introduction
Cutting Structure
The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.
Gauge Structure
Multiple gauge protection with gauge trimmers on heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.
Bearing Structure
High precision bearing with two thrust faces. Balls lock the cone.Hardface heard bearing surface. Cone bearing inlaid with friction-reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved and suitable for high rotary speed.
Seal and Lubrication
The advanced metal seal package consists of two metal seats and two elastic energizers. Compressed energizers ensure good contact being kept on two sealing surfaces of metal rings by elastic force, and achieve the bearing seal. In the drilling, metal seal are relatively dynamic, and the energizers are static. This will improve the reliability and durability of bearing seal. The pressure compensator system and advanced grease can greatly increase the lubricating reliability.
Product Application
It is suitable for downhole motor and high speed applications?
Recommended Drilling Parameter
Specification
|
IADC |
WOB (KN/mm) |
RPM (r/min) |
Applicable Formations |
|
437/447/435 |
0.35~0.9 |
240~70 |
Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk,gypsum,salt,soft limestone, etc. |
|
517/527/515 |
0.35~1.0 |
220~60 |
Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft limestone, etc. |
|
537/547/535 |
0.45~1.0 |
220~50 |
Soft to medium formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds, etc. |
|
617/615 |
0.45~1.1 |
200~50 |
Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc |
|
637/635 |
0.5~1.1 |
180~40 |
Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc. |
|
Note: The upper limits of WOB and RPM in above table should not be used simultaneously. |
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