Mathematical Model and Experimental Investigation of Bit-Bounce in Horizontal Oil Well Drillstring

Wang, Bo; Ren, Fushen; Yao, Zhigang; Fang, Tiancheng

doi:10.1007/s13369-019-04021-3

Cited by 5 publications

(1 citation statement)

References 35 publications

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“…Chen et al [Chen, Fu, Ma et al (2018)] proposed a non-linear coupled bottom hole assembly (BHA) bit-formation-wellbore model for BHAs with bent-housing positive displacement motor using the finite element method to investigate the dynamic behavior and steering ability under fully rotary drilling. Wang et al [Wang, Ren, Yao et al (2019)] used Hamilton principle of energy method to derive the drill string motion equation, and studied the influence of axial excitation and torque excitation on bit-bounce in horizontal wells with finite element method. The friction and fluid-solid coupling between drill string and borehole wall are considered in the model.…”

Section: Introductionmentioning

confidence: 99%

Vibration Analysis of a Drillstring in Horizontal Well

Zhu¹,

Zeng²,

Li³

2019

Computer Modeling in Engineering &Amp; Sciences

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The complicated geological conditions will bring great challenges to the drillstring of horizontal wells for the reason that the increase of the well depth in Sichuan-Chongqing region. Since drillstring failure and friction during drilling are generally caused by drillstring vibration, great importance must be attached to computer simulation methods for the prediction of drillstring vibration. A finite element model considering axial, lateral and torsional vibration is established. In order to verify the established numerical model, an indoor experimental device based on the similarity principle was established. The vibration characteristics of three shale gas horizontal wells drillstrings are described. The reasons for the large difference in vibration characteristics between the three wells were discussed by changing the well structure, BHA(bottom hole assembly) and drilling parameters. The simulation results show that the depth of ultra-deep well 3 is only 1.27 times of that of medium-deep well 2, but the fluctuation of WOB (weight on bit) is 2.8 times. The primary factor for the great difference of WOB fluctuation is the change of vertical section depth, the secondary factor is the change of the horizontal section length. Additionally, the reasonable range of speeds has been proposed and applied in the field. The advantage of this numerical analysis method is that it can judge the vibration and friction torque of drillstring in horizontal wells with arbitrary structure, drilling parameters and BHA. This method has certain guiding significance to the field practice.

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Section: Introductionmentioning

confidence: 99%