Vibration damper-calibrator for shock wave damping from sharp bit installation on the bottomhole

Abstract This article addresses the problem of drill string vibration. In particular, the issue of quenching of high-amplitude low-frequency vibrations generated from sharp installation of the bit on the bottomhole is analyzed. This problem is virtually uncontrolled and arises from objective factors such as rock collapse and subjective factors such as driller error. It is proposed to use impact type of vibration damper for damping of this type of vibration. Possible design of well impact vibration damper-calibrator is shown. A dynamic model of the vibration damper has been built. Analysis of the model suggests the efficiency of using these types of vibration dampers to eliminate high-amplitude low-frequency vibrations of drill columns.