Abstract
Abstract. It is well known that the influence of the internal and external
drilling fluid on the lateral vibration characteristics of drillstring
cannot be ignored. In this paper, experiment apparatus for simulating
drillstring vibration was established. Hammering method is used to measure
drillstring lateral natural vibration frequency when the internal and
external drilling fluid is considered. The test results show that the
drilling fluid can decrease the natural frequency of the drillstring. Based
on the simulation model, considering the influence of the internal and
external drilling fluid, an external drilling fluid additional mass
coefficient is derived considering the dynamic pressure effect caused by
external drilling fluid. Additional mass coefficient can get the result with
high precision, which can meet the needs of the project. the simulation
results are in good agreement with the test results, and the error is within
2 %. This work provides a useful attempt and lays the foundation for the
dynamics of the drill string in the drilling fluid environment.
Subject
Industrial and Manufacturing Engineering,Fluid Flow and Transfer Processes,Mechanical Engineering,Mechanics of Materials,Civil and Structural Engineering,Control and Systems Engineering
Cited by
8 articles.
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