API standards, as established by the American Petroleum Institute, enable drilling professionals the world over to communicate clearly.
The American Petroleum Institute:
*maintains more than 500 standards and recommended practices
*represents the oil and gas industry to the public, Congress, state governments, and media.
American Petroleum Institute Standards for PDC and Rock Bit Tolerances
|Bit Size (In.)||O.D. Tolerance (In.)|
|6 3/4" and smaller||-0.015 to +0.00 PDC||-0.0 to +1/32 Rock Bit|
|6 25/32" to 9"||-0.020 to +0.00 PDC||-0.0 to +1/32 Rock Bit|
|9 1/32" to 13 3/4"||-0.030 to +0.00 PDC||-0.0 to +1/32 Rock Bit|
|13 25/32" to 17 1/2"||-0.045 to +0.00 PDC||-0.0 to +1/16 Rock Bit|
|17 17/32" and larger||-0.063 to +0.00 PDC||-0.0 to +3/32 Rock Bit|
4 5/8" to 5 1/2" drill bits - 2 7/8" API Reg. pin
5 5/8" to 7 3/8" drill bits - 3 1/2" API Reg. pin
|Number of Nozzles|
API Standards: API standards, including pin sizes for drill bits and acceptable tolerances for rock bits and pdc bits.
Atlas Copco: Atlas Copco bit selection guide, examples of shirttail protection, and TCI and steel tooth cutting structure.
Button Bits: Button bits offer several advantages over PDC drill bits: they are less expensive and can withstand higher impact.
Drag Bits: Drag Bits manufactured as one solid piece of alloy steel offer greater durability and reliability. Available in step and chevron styles for hard rock drilling.
Dull Grading: Dull grading drill bits is important but often overlooked. This process provides valuable information for proper bit selection.
IADC: The IADC classification system for tooth and button bits explained as well as dull grading codes and what they mean.
IADC Classification: The IADC classification system for PDC bits: pictures and explanation of what it means and how to use it.
PDC Cutters: Because of PDC cutters, PDC bits drill sixty-five percent of total footage. Their shearing action is more efficient than the crushing action of tricones.
PDC Drill Bits: Available in either matrix or steel bodies, PDC drill bits offer higher rate of penetration than tricones in many different formations.
Tricones: With the exception of cutting structure, tricone bits are designed in the same manner regardless of manufacturer.
Well Completion Bits: Well completion drill bits from Atlas Copco in both tooth and button bits. Bear Claw, Hurricane, Aardvark, and PDC diamond mill bits from KC Bit & Supply.