Characteristics of Cone Structure
1. Cutting Structure
The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.
2. 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.
3. 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.
Tricone bit Cutting structure: very long widely spaced , chisel-shaped inserts and considerable cone axis offset against center line of bit ensure very high penetration rate . To secure the bit from diameter loss, the gage protection inserts have got shorter length and greater angle of the top. Formations: long intervals of very soft poorly compacted shale, sandstone, clays, salts and soft mestones. Size and IADC available: 2 7/8 to 26 IADC 114 117 216 217 317 321 417 437 517 537 617 637 and so on.
The parametric drawing system of three teeth wheel drill adopts the modular programming method; the whole system is divided into four functional modules: user interface management module, the bit of tooth surface structure design module, database management module and parametric drawing module. The performance of roller cone bit design of user interface use VBA, which is embedded in AutoCAD, to realize second tools development. The user through the user interface module input relevant parameters of three cone bit design to realize the man-machine communication. The main function of the bit teeth structure design module is designed according to the theory of three cone bit three bit data for the design of complex calculations. Database management module is composed of Access 2003 as a data from the establishment of the database.