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 |
---|
Nozzle Size |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|
7 | .0376 | .0752 | .1127 | .1503 | .1877 | .2255 | .2631 | .3007 |
8 | .0491 | .0982 | .1473 | .1963 | .2454 | .2945 | .3435 | .3927 | 9 | .0621 | .1242 | .1864 | .2485 | .3106 | .3728 | .4249 | .4970 | 10 | .0767 | .1534 | .2301 | .3060 | .3835 | .4602 | .5369 | .6136 | 11 | .0928 | .1856 | .2784 | .3712 | .4640 | .5568 | .6496 | .7424 | 12 | .1104 | .2209 | .3313 | .4418 | .5522 | .6627 | .7731 | .8836 | 13 | .1296 | .2592 | .3889 | .5185 | .6481 | .7777 | .9073 | 1.0370 | 14 | .1503 | .3007 | .4510 | .6013 | .7517 | .9020 | 1.0523 | 1.2026 | 15 | .1726 | .3451 | .5177 | .6903 | .8629 | 1.0354 | 1.2080 | 1.3806 | 16 | .1963 | .3927 | .5890 | .7854 | .9817 | 1.1781 | 1.3744 | 1.5708 | 18 | .2485 | .4970 | .7455 | .9940 | 1.2425 | 1.4910 | 1.7395 | 1.9880 | 20 | .3068 | .6136 | .9204 | 1.2272 | 1.5340 | 1.8408 | 2.1476 | 2.4544 | 22 | .3712 | .7424 | 1.1137 | 1.4849 | 1.8561 | 2.2273 | 2.5986 | 2.9698 |
Related Pages: 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. |
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