#JET TO DRILL BIT SIZE CHART HOW TO#
#JET TO DRILL BIT SIZE CHART CODE#

Formations classified as medium hard to hard non-abrasive are the best suited for the 211, such as formations are hard shale, dolomite lime, hard anhydrite, slate and soft limestone. The 211 IADC rock bit is designed to drill formations having compressive strength of a magnitude somewhat greater than that noted in the 111 rock bit.

Lighter drilling weights between 2,000 to 4,500 pounds per inch of bit diameter and faster rotary speeds of 70 to 120 RPM are usually employed with these efficient bits. The long, widely spaced teeth are interfitted in such a manner so as to provide a twisting-tearing action that is so essential in the soft unconsolidated formations. The 111 IADC rock bit is designed for rapid penetration in formations having a low compressive strength and high drillability, such as clays, sand, soft shales, red beds, salt, and soft sandstone. Listed below are many tricone bit sizes and their corresponding pin size. In addition to the buttons, intended rock formations, and bearings used, tricone drill bits can have numerous other special properties: The fourth digit is a letter indicating the special properties of the Tricone Drilling Bit.

6 is for a standard sealed journal bearing, and 7 is for a sealed journal bearing with gauge protection. 4 is for standard sealed roller bearings, and 5 is for a sealed roller bearing with gauge protection.Ħ and 7: sealed journal bearings. 1 is for standard roller bearings, 2 is for air cooled bearings, and 3 is for open bearing with gauge protection.Ĥ and 5: sealed roller bearings. The third digit represents the bearing type of the Tricone Drilling Bit.įor Example, Tricone Drilling Bits use a different bearing depending on the type of material to be drilled.ġ, 2 and 3: are for roller bearings. 1 represents soft formations going up to 4 representing the hardest formations. Regardless of tooth type, the second digit takes into account all factors of the bit and ranks the rock formations the drilling bit is best suited for on a scale from 1 to 4. The second digit represents further rock formation information. Within this category 4 is designated for the softer formations, with 8 representing the hardest formations. 1 is engineered for soft rock formations, 2 for medium formations, and 3 for hard formations.Ĥ, 5, 6, 7, and 8: Indicates a tungsten carbide insert (TCI). The bit is assigned a number between 1 and 8 indicating the type of rock the teeth or buttons of a drilling bit are designed for:ġ, 2 and 3: Indicate a steel tooth. The first digit represents the hardness of rock formation the tricone drilling bit buttons or teeth are best suited for.Įvery drill bit is designed for a certain type of rock formation, ranked according to hardness.

#JET TO DRILL BIT SIZE CHART CODE#

FOR EXAMPLE, IADC CODE OF 311, 321, 331 ARE ALL HARD FORMATION BITS. THE SECOND DIGIT IS ONLY A FURTHER BREAKDOWN WITHIN THE FIRST DIGITS FORMATION. PLEASE NOTE THE FIRST DIGIT DETERMINES FORMATION HARDNESS.

#JET TO DRILL BIT SIZE CHART HOW TO#

HOW TO READ IADC CODES FOR TRICONE DRILL BITS Click here for information on Junk Mill Bits. We also carry PDC Bits, Drag Bits, Claw Bits, Replaceable Blade Bits, Hammer Bits and much more! Click here for claw bits and drag bits pictures. Some brands include: Varel, Throop, Thompson, Smith, Baker Hughes, Focus and Reed. stocks a complete line of new and retip, steel and carbide button Tricone bits. Complete Inventory of all of NDS’s New Stock Tricones.Ģ-15/16″ Tricone Bit with an Open Bearingģ-7/8″ Tricone Button Bit with an Open Bearing and Gauge ProtectionĤ″ Tricone Bit with an Open Bearing and Gauge ProtectionĤ-1/2″ Tricone Bit with an Open Bearing and Gauge ProtectionĤ-3/4″ Tricone Button Bit with an Open Bearing and Gauge ProtectionĦ″ Tricone Button Bit with an Open Bearing and Gauge ProtectionĦ-1/2″ Tricone Bit with an Open Bearing Click Here for Sales PriceĦ-3/4″ Tricone Button Bit with an Sealed Journal Bearing and Gauge Protectionħ-7/8″, 8-1/2″ and 8-3/4″ NEW Tricone Button Bit with a Sealed Bearing and Gauge Protection Click Here for Sales Priceġ2-1/4″ Tricone Button Bit with an Open Bearing and Gauge Protection

Jet to drill bit size chart