常规PDC钻头在岩石疏松、结构松散、无规律含砾、软硬交错等复杂地层中钻进时受力不均,导致钻头平均机械钻速低,钻进困难,难以满足高效钻井要求。针对这一现象,重新对PDC钻头的布齿方式、冠部头型、水力结构、钻头稳定性等方面进行个性化设计。在复杂地层应用情况表明,所设计的钻头极大地提高了钻进速度,减少了起下钻次数,缩短了钻井周期,有效地预防了钻井事故的发生,节约了钻井成本,经济效益显著。 Conventional PDC bits suffer from unequal forces when drilling in complex formations such as loose rock, loose structure, irregular gravel, hard and soft interlacing, etc., resulting in low average penetration rate and difficult drilling, which makes it difficult to meet the requirements of high-efficiency drilling. In response to this phenomenon, re-PDC cloth on the way, crown head, hydraulic structure, bit stability and other aspects of personalized design. The application in complex stratum shows that the designed bit greatly improves the drilling speed, reduces the number of drilling times, shortens the drilling period, effectively prevents the drilling accident, saves the drilling cost and has obvious economic benefits.