12 1/4 inch Sealed Bearing TCI Tricone Roller Bit for Mining Well
Drilling
Sealed Bearing TCI Tricone Roller Bit for Mining Well Drilling
Tricone Bit, or called Roller Bit, is a most widely used rotary
drilling tool for water well drilling and mining, and HDD
(horizontal directional drilling) drilling tool. The cutting teeth
alternately touch the bottom of the well when the cone bit is
working, the rock-breaking torque is small, the contact area
between the cutting teeth and the bottom of the well is small, the
pressure is higher, and it is easy to enter the stratum.The total
length of the working blade is large, thus reducing the wear. It is
suitable for varies formations from soft rock to rather hard rock.
Description of Tricone Bits:
(1) Cutting Structure of this series tricone rock bit:
The durability of premium tungsten carbide inserts is improved with
new formulas and new techniques for insert bit.The wear-resistance
of teeth is enhanced with premium tungsten carbide hardfacing on
the tooth surfaces for steel tooth bit.
(2) Gauge Structure of this series tricone rock bit :
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.
(3) Bearing Structure of this series tricone rock bit :
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.
(4) Seal and Lubrication of this series tricone rock bit :
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.
Features of Tricone Bits:
(1) IADC code: 417 427 437 517 527 537 617 627 637 737 837 832 415
425 435 445 525 625 635 416 427 436 446 447 516 526 537 547 516 536
535, 637, 642, 737, 742, 745, 835, 837, 842.
(2) Sizes: From 6 1/4" to 12 1/4"
(3) Bearing type: sealed bearing and non-sealed bearing
(4) Formation or layer: soft, medium soft, hard, medium hard, very
hard formation
IADC CODE:
| IADC Code | WOB | RPM | Application |
| (KN/mm) | (r/min) |
| 437/447/435 | 0.35-0.9 | 240-70 | very soft formations with low compressive strength and high drill
ability, like clay, mudstone, chalk, gypsum, salt, soft limestone |
| 517/527/515 | 0.35-1.0 | 220-60 | soft formations with low compressive strength and high drill
ability, like mudstone, gypsum, salt, soft limestone |
| 537/547/535 | 0.45-1.0 | 220-50 | soft to medium formations with low compressive strength, like
medium, soft shake, medium soft limestone, medium soft sandstone,
medium formation with harder and abrasive interbeds |
| 617/615 | 0.45-1.1 | 200-50 | medium hard formation with high compressive strength, like hard
shale, limestone, sandstone, dolomite |
| 637/635 | 0.5-1.1 | 180-40 | hard formation with high compressive strength, like limestone,
sandstone, dolomite, hard gypsum, marble |
| Note: Above limitts of WOB and RRPM should not be used
simultaneously |
| Thread Pin: |
| Bit Diameter | API PIN |
| (inch) | (mm) |
| 6 1/4"~6 3/4" | 159~171 | 3 1/2" |
| 7 1/2"~9 1/2" | 190.5~241 | 4 1/2" |
| 9 5/8"~12 1/4" | 245~311 | 6 5/8" |
How to read IADC Code:
For more information please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com ; http://www.roschen.net
