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With the exploitation of oil and gas underground, the engineering has developed toward the direction of deep well, even super deep well, the problem of fatigue of drill string has a great effect to drilling engineering. Resonance is one of the main reasons that induces drill string fatigue. In this paper drill string of deep well is object being studied. The models about axial vibration, lateral vibration...
Drill string vibration is a very prevalent phenomena, it does great effect to drilling engineering, drill string resonance is the main reason that causes the drill string fatigue. In this paper the drill string is object that is studied, the axial vibration is analyzed for the total system of drill string. The model of axial vibration is established, the rule about axial vibration of drill string...
During the engineering of horizontal well, drill string is in the complicated moving state, strong vibration is the main reason that induces drill string failure. Drill string vibrations usually have axial vibration, lateral vibration, torsional vibration and coupling vibration, the drill string near the bottom of well usually vibrates strongly. As an example to G78-E15, the variety of vibration is...
During exploitation of straight well engineer, the problem of drill string failure is very serious; drill string resonance is main reason. In this paper drill string of deep well is object being studied. The models about axial vibration, lateral vibration and torsional vibration are set up. Modal vibrations of drill string are studied. All sorts of resonance frequency are obtained practicability,...
During exploitation of extended reach well (ERW) drilling engineer, the problem of drill string failure is very serious; drill string vibrations are main reasons. In this paper drill string of extended reach well of different part is object being studied. The models about various vibrations are set up. Modal vibrations of drill string are studied. All sorts of resonance frequencies are obtained practicability...
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