The Structure Vibration Research Of Drilling Platform On Tarim Oilfield

The topography of Tarim oilfield is complex, wells are mostly from4000m to7600m deep orultra-deep, and drilling the ultra-deep ones will produce great impactive vibration so that brings a stronginjury on the whole well drilling platform. Meanwhile, strong sandstorms in the Taklimakan Desert fromMarch to May each year will also cause vibration damage and affect the normal operation of the welldrilling platform which is located deep in the desert. However, the study on the vibration control of deepwell drilling platform in Tarim Oilfield is very little, vibratory source incentive situation about the influenceof sandstorms and drilling ultra-deep well is unknown. This paper aims at the actual condition of vibrationexcitation and vibration reduction of Tarim Oilfield drilling platform, so firstly do extensive field research.Then take Number five Wells ZJ90/6750DB rig in Heatgeneral area as test object, vibration testing data iscollected in the X,Y,Z directions of Platform to make frequency-spectrum analysis so it comes out themaximum vibration frequency and amplitude while drilling. The results show that air compressor and otherdrilling power system has a powerful vibration influence on the drilling platform, displacement is mainlyvertical vibration in the Z direction, and when the vibration frequency is17.5Hz and82.3Hz,the amplitudewill reach to1.203mm and1.16mm, which all is the maximum value respectively. Then, storm wind havean great effect on the vibration of drilling platform, When the wind vibration frequency is11.5Hz, thevibration amplitude in Z direction reach to0.463mm. Next, based on this test, establish a four degrees offreedom vibration control model about the drilling platform, then get the optimal parameters of vibrationcontrol according to numerical analyzing and calculating the model. which concluded that the idealoptimized parameters of vibration control for the damping coefficient of zeta=0.19130.52, qualitycoefficient mu=0.4736to0.7. At the last, based on the parameters, design the tuned mass damper devicein the vertical direction of the platform and do simulation analysis on the vibration effect of this device, theSimulation result shows that compared with damping before, after the vibration amplitude, the early stageof the vibration waveform has obvious vibration control effect, in the initial stage, the vibration dampingeffect can reach70.1%, the reduction of vibration is much more effective which provides a reference valuefor the practical application of engineering.