IADC

基本解釋

In order to grade the used bits, IADC published the Three Point Dull Bit Grading Scheme.
為了對已使用的鉆頭進行磨損定級,IADC制定了T-B-G鉆頭磨損三位定級方法。
Because it cannot fully evaluate the dull bit characteristics, IADC published the Eight Point Dull Bit Grading Scheme to replace the old scheme.
由于其不能全面反映鉆頭的磨損情況,后來又制定了鉆頭磨損八位定級方法。
The examples said the formula is closer to reality than that given by API and IADC,and said also the casing bend testing need do further.
算例表明，該公式比API和IADC推薦的公式更接近實際，也表明此問題還需做進一步的試驗研究。
IADC International association drilling contractor
國際鉆井承包商
IADC; International Association of Dento-Maxillo-Facial Radiology;
國際牙齒、上頜與面部放射學協(xié)會;