Controlled blade flex for fixed cutter drill bits

• Main Authors: THOMAS JEFFREY GERALD, OWNBY CLAYTON ARTHUR
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2016
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

An example drill bit may include a drill bit body and a flexible blade positioned on the drill bit body. The drill bit further may include a cutting element coupled to and extending a distance beyond a face of the flexible blade. The cutting element may have a back rake angle and a side rake angle. At least one of the distance, back rake angle, and side rake angle may depend on a flexed position of the flexible blade. 种示例性钻头可包括钻头体和定位在所述钻头体上的可挠曲刀片。所述钻头还可包括切削元件，所述切削元件耦接到所述可挠曲刀片的面上并且延伸超过所述可挠曲刀片的面定距离。所述切削元件可具有后倾角和侧倾角。所述距离、后倾角和侧倾角中的至少个可取决于所述可挠曲刀片的挠曲位置。