|Model Number:||12Inch||Drill Rock Hardness:||F=6-20|
|Processing Type:||Forging||Usage:||Oil Field, Natural Gas, Mining Drlling, Water Well|
|Material:||T.C. With Diamond Anti-abrasive Layer||Bearing:||Sealed Journal Bearing|
|Package:||Carton And Wooden Case||Tooth Type:||Insert Tooth|
tricone drill bit,
water well drill bits
Diamond Anti Abrasive Layer Tricone Drill Bit , Elastomer Sealed TCI Hard Rock Drill Bits
Structure of Tricone bits
Steel Tooth Tricone Bit and TCI tricone bits
1- Bearing Structure
Bit bearing has three kinds: rolling bearing, sliding bearing, sliding bearing circlip. The circlip sliding bearing is mainly for foreign manufacturers of products bearing the TCI tricone bit, at most only rolling bearing and sliding bearing.
2- Cutting Structure, Cone and Tooth
The cone is a cone, divided into single cone and cone two. Single cone consists of main cone and the back component, single cone in the bottom of the well for pure rolling movement, suitable for drilling hard formation; complex cone consists of main cone, side cone and the back cone is composed of three parts, the cone at the bottom of the well work besides the rolling, also produce sliding, suitable for soft stratum drilling.
Hard alloy gear has 10 a variety of, such as spherical, conical, wedge shaped, spoon, spoon shaped, cone top spoon shaped, flat shape, the conical wedge shape, different lithology formation, the rock breaking mechanism of bit teeth shape is different, different. A type of drill often is not a tooth.
The shape of the steel tooth is wedge shaped, in order to strengthen the drill gage, outer row of teeth are often designed into "T", "L", "II"; in order to overcome the drill bit is easy to wear in the broken strata shortcomings, need welding wear-resistant material on the tooth face and the back cone.
Tooth shape, size, number, length depends on the hardness of formation, formation is soft, is large, sharp teeth, less; on the contrary, the more hard tooth formation, smaller, shorter, the more the number of.
3- Oil Pressure Compensation System
The device consists of a bearing ring, oil sac, protection cup, gland, plug, when the ring parts. Its role is to the bearing chamber pressure difference between inside and outside the balance of TCI Tricone bit, so that the bearing sealing ring in the small pressure difference work for long time, prevent the drilling fluid into the bearing cavity and avoid the leakage of lubricating grease, and store enough grease to the bearing cavity continuously added, the bit in good sealing state and lubrication condition.
4- Bit Nozzle
In order to solve the problems timely rushed from the bottom of the well cuttings, to maintain the bottom clean, even with a high speed jet to crush the rock and purpose, people design and installation of the nozzle.
The nozzle is made of hard alloy processing, commonly used nozzle has three main models, the standard type, cover type, and the micro long nozzle, the other is pulsed nozzle, oblique nozzle, extended nozzle etc..
Application of tricone bits
TCI bits series:
1. Soft formation TCI tricone bits:
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.
2. Medium formation TCI tricone bits:
The medium formation TCI tricone bits features aggressive chisel tungsten carbide inserts on the heel rows and inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard for mations. The HSN rubber O-ring provides adequate sealing for bearing durability.
3. Hard formation TCI tricone bits:
The hard formation TCI tricone bits can be used to drill hard and abrasive formations. Wear resistance tungsten carbide inserts are used in the outer rows to prevent loss of bit gauge. Maximum numbers of hemispherical shaped inserts are used in all rows to provide cutter durability and long life.
4. Medium hard formation TCI tricone bits:
The medium hard formation TCI tricone bits features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows. This design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations. The HSN rubber O-ring provides adequate sealing for bearing durability.
Steel tooth bits series:
1. Soft formation tooth bits:
The soft formations tooth bits are used to drill low compressive strength, soft formations. Long projection tooth lengths are used on high offset cones to provide the greatest penetrations rates possible. Wear resistance hard facing is used to control tooth wear. On the softest bit types this hard facing completely covers the bit teeth.
2. Medium hard formations tooth bits:
The medium hard formation tooth bits are used to drill high compressive strength, medium hard formations. Shoot projection teeth with reduced crest length are used in this series of bit designs. Durable hard facing is applied to reduce tooth wear.
1. Cutting Structure of this type sealed and non-sealed tci tricone bits :
The wear-resistance of teeth is enhanced with premium tungsten carbide hard facing on the
tooth surfaces for steel tooth bit.
2. Gauge Structure of this type tci tricone rock bits:
Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge
surface of the cone, tungsten carbide inserts and hard facing on the shirttail increases
gauge holding capability and bearing life.
3. Bearing Structure of this type tci tricone rock bits :
High precision roller bearing with two thrust faces. Ball locks the cone. Thrust faces hard face
with wear resistant alloy. Abrasion resistance and seizure resistance of the bearing are improved.
|417/437/||0.35~0.9||150~70||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||140~60||Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc.|
|537/547/535||0.45~1.0||120~50||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||90~50||Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc|
|637/635||0.5~1.2||80~40||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.|
Contact Person: Sekura Yu