Vibration test and assessment for an ocean drilling rig derrick: Taking the ZJ50/3150DB drilling rig as an example

Hu, Jun; Tang, Yougang; Li, Shixi

doi:10.1016/s1876-3804(13)60014-2

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…The forced vibration of the mass block and cantilever beam caused by the longitudinal vibration of the drill pipe is a key part of realizing energy harvest. The longitudinal frequency signal of the drilling pipe could be obtained via vibration signal analysis based on fast Fourier transform once after the signal is detected by the frequency detection system [31,32]. The longitudinal vibration frequency of the drill pipe varies when drilling in different formations because of the diverse hardness of different formations.…”

Section: Length and Position Design Of Piezoelectric Elementmentioning

confidence: 99%

Design and Analysis of a While-Drilling Energy-Harvesting Device Based on Piezoelectric Effect

Zheng

Dou

et al. 2021

Energies

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A while-drilling energy harvesting device is designed in this paper to recovery energy along with the longitudinal vibration of the drill pipes, aiming to serve as a continuous power supply for downhole instruments during the drilling procedure. Radial size of the energy harvesting device is determined through the drilling engineering field experience and geological survey reports. A piezoelectric coupling model based on the selected piezoelectric material was established via COMSOL Multiphysics numerical simulation. The forced vibration was analyzed to determine the piezoelectric patch length range and their best installation positions. Modal analysis and frequency response research indicate that the natural frequency of the piezoelectric cantilever beam increased monotonously with the increase of the piezoelectric patch’ thickness before reaching an inflection point. Moreover, the simulation results imply that the peak voltage of the harvested energy varied in a regional manner with the increase of the piezoelectric patches. When the thickness of the piezoelectric patches was 1.2–1.4 mm, the designed device gained the best energy harvest performance with a peak voltage of 15–40 V. Works in this paper provide theoretical support and design reference for the application of the piezoelectric material in the drilling field.

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Section: Length and Position Design Of Piezoelectric Elementmentioning

confidence: 99%

Design and Analysis of a While-Drilling Energy-Harvesting Device Based on Piezoelectric Effect

Zheng

Dou

et al. 2021

Energies

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“…This paper adopts Duell formula to calculate its moment of inertia of the ship ( I φφ ) ( ) where D is vessel displacement, B is vessel width, g z is the height of the ship's center of gravity from the baseline. This formula assumes that the ship is a rectangular parallelepiped, the length is L, width is B, height is 2, and assume the quality of ship is uniformly distributed in the six surface bodies [9]. The formula is simple and certain degree of accuracy, widely used in practice.…”

Section: The Mathematical Model Of Ship Rolling Motionmentioning

confidence: 99%

Ship Nonlinear Rolling and Roll Angle Reconstruction Based on FIR

Lu¹,

Zhang²,

Chen³

et al. 2015

OALib

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The paper analyzes the nonlinear damping torque and nonlinear restoring moment and establishes the nonlinear motion equation of ship rolling under random sea. The Runge-Kutta method is used in the time domain to solve the equation, and to simulate the time history of random wave excitation ship rolling and free decay process. This paper used the ship attitude inertial measurement system and its algorithm technology to construct the ship rolling angle from the acceleration measuring signals and to simulate the angle acceleration measurement signal. To study on test conditions of these parameters and the method to improve the accuracy of parameters, the effect of acceleration measurement noise on angle reconstruction accuracy is studied. Under SNR 20, reconstructed angle RMSE is 0.0019 rad. Studies show that the inertial measurement system and algorithm can effectively reconstruct ship rolling angle from the acceleration measurement signal, and the algorithm has the ability to suppress measurement noise.

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“…Simulation methods used to obtain characteristics such as natural frequencies and mode shapes, design assessment and safety, and vibration response are becoming more popular and useful for performing studies on the derrick [1][2][3][4][5][6]. Due to the complex conditions of marine environments [7][8][9], extensive research is needed to understand the nature of loads acting on structures operating in the marine environment [10,11].…”

Section: Introductionmentioning

confidence: 99%

Unconstrained Dynamic Simulation on Offshore Dual Derrick

2022

IJEM

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With the increase in demand for oil and oil products, the petroleum industry is faced with the requirement for more complex tools to increase production at lower prices. The complexity of drilling tools is manifested in the complex geometry, fabrication, assembly, deformations, stresses and loads acting on them. This study introduces a dual derrick simulation procedure in a marine environment which provides a step towards a better understanding by giving a simulation close to the real state. The derrick was considered in equilibrium, and then the derrick vibration was simulated using field data in order to obtain stress distribution. This implies that the derrick can move freely and cause deformations in all directions without constraints. In this paper, the finite element method was employed to simulate the derrick in a static state and in motion, and then the obtained stress distribution was compared for both cases. A literature review on the analysis of environment working conditions is provided. The results showed that the vibration of the platform increased the stress considerably. The maximum combined stress increased by 27 %, while the maximum bending stress increased by 40 % and reached considerably higher values in the beams connected to the top of the derrick.

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Vibration test and assessment for an ocean drilling rig derrick: Taking the ZJ50/3150DB drilling rig as an example

Cited by 10 publications

References 1 publication

Design and Analysis of a While-Drilling Energy-Harvesting Device Based on Piezoelectric Effect

Design and Analysis of a While-Drilling Energy-Harvesting Device Based on Piezoelectric Effect

Ship Nonlinear Rolling and Roll Angle Reconstruction Based on FIR

Unconstrained Dynamic Simulation on Offshore Dual Derrick

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