A drill bit is a device attached to the end of the drill string that breaks apart, cuts or crushes the rock formations when drilling a wellbore, such as those drilled to extract water, gas, or oil.
The drill bit is hollow and has jets to allow for the expulsion of the drilling fluid, or mud, at high velocity and high pressure to help clean the bit and, for softer formations, help to break apart the rock.
A tricone bit comprises three conical rollers with teeth made of a hard material, such as tungsten carbide. The teeth break rock by crushing as the rollers move around the bottom of the borehole.
The milled tooth (steel tooth) tricone bits drilling for soft to medium rock formation.
The soft formation milled tooth tricone bits are used to drill low compressive strength, soft formation. 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.
The medium formation milled tooth tricone bits are used to drill high compressive strength, medium rock formation. Shoot projection teeth with reduced crest length are used in this series of bit designs. Durable hard facing is applied to reduce tooth wear.
Model | TCI Bit, Steel Teeth Bit / MILLED TOOTH BITS |
IADC CODE | 116 117 12 6127 136 137 216 217 226 226 316 317 326 327 336 337 115 125 135 215 225 235 315 325 335 114 124 214 314 111 121 131 346 347, etc. |
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, etc. | |
Available sizes | From 2-7/8 to 26” larger sizes for hole opener bit ,reamer bit |
Bearing type | Sealed bearing and non-sealed bearing HJ(metal sealed journal bearing) HA (rubber sealed journal bearing Air cooled bearing type |
Formation or layer | Soft ,medium soft ,hard, medium hard, very hard formation |
Button size (extra features) | 1. Y-Conical teeth 2. X-chisel teeth 3. K- wide teeth 4. G- Gauge protection |
Material | Alloy steel, Carbide |
Customized | Please provide bit size, IADC code/formation etc. |
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