Influence of Heavy Weight Drill Pipe Material and Drill Bit Manufacturing Errors on Stress State of Steel Blades

Drilling volumes should be increased in order to increase hydrocarbon production, but this is impossible without the usage of high-quality drilling tools made modern structural materials. The study has analyze design, technological and operational methods performance various materials highlighted prospects method applications. scientific novelty consists development a new analytical model PDC drill bit–well interaction. developed takes into account bit manufacturing errors form body–nipple axes misalignment on strength. This result makes it possible determine permissible provide safe operation bit. It established that there an additional transverse force presses well wall rock due errors. determined magnitude clamping can significant. material effect been analyzed force. geometric imperfection causes minimal for elastic system pipe string, which includes calibrator composed pipes based composite carbon fiber material, maximal effect—for steel pipes. Polycrystalline diamond compact (PDC) contact interaction during non-standard mode considered. Non-standard stresses are determined, strength blades estimated different values error.