Dynamic Research and Experimental Analysis of a New Downhole Drilling Tool

Tian, Jialin; Wei, Lai; Zhang, Tangjia

doi:10.1007/s13369-019-04061-9

Cited by 20 publications

(6 citation statements)

References 18 publications

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“…He proposed a new oscillator based on a positive displacement motor, designed a new structure, and, combined with new complex drilling conditions, proposed a mathematical model, including the newly designed working mechanism and structural parameters. Although the vibration displacement, system vibration spectrum, and velocity at different drill string positions can be obtained in this way, he ignores the interference of electromagnetic field on downhole operation, and it is not enough to only solve the rock-breaking efficiency [3]. Samuel proposed that the inflow and migration of fluid in the wellbore have a great impact on the damping coefficient, so it is necessary to monitor the high-frequency acceleration data for early detection.…”

Section: Related Workmentioning

confidence: 99%

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Zhang

Yang

2022

Advances in Civil Engineering

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The transmission and radiation of underground variable frequency electromagnetic waves will seriously interfere with the operation of the power cable and its surrounding environment. At present, the test methods for power cables basically require the impedance of the test system to match the characteristic impedance of the cable. The defect is that the process of designing and making the impedance matching impedance network is relatively complex and requires high manufacturing accuracy. In order to solve these problems, this paper puts forward the electromagnetic field fast detection formula and electromagnetic field shielding method of underground variable frequency power cable. The research method of this paper is the principle of shielding electromagnetic field materials and the suppression principle of shielding layer for electromagnetic coupling. The function of the two principles is to study the reflection, absorption, and multiple reflection of electromagnetic waves and to study the cut-off frequency of the nonmagnetic shielding layer. These two principles guide the experiment. In this paper, the measurement formula of the shielding performance of mismatched cables is derived through experiments. The results show that the error of the measurement formula is no more than 8 dB. Then, through the experiment of restraining the interference of magnetic materials on the electromagnetic field, it is concluded that the magnetic field shielding performance can reach 20 dB. Then, through the performance test of electromagnetic field shielding materials, the shielding efficiency of metal fiber antiradiation materials is the largest, and the average efficiency reaches 76.4 dB.

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Section: Related Workmentioning

confidence: 99%

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Zhang

Yang

2022

Advances in Civil Engineering

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“…27,28 That is to say, when a system and the controlled objects are not fully understandable, or cannot obtain system parameters through effective measurement methods, it is most suitable to use PID control technology. [29][30][31][32] The PID control method is to perform proportional calculus operation on the deviation amount (output value minus input set value), and the obtained results are added to obtain the system output.…”

Section: Theoretical Modelmentioning

confidence: 99%

Analysis of stick-slip reduction for a new torsional vibration tool based on PID control

Tian

Zhou

Yang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part K:

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The phenomenon of stick-slip vibration is widespread in the exploration of deep and ultra-deep wells. It causes the reduction of the mechanical drilling rate and wastes the driving energy. Besides, it also accelerates the aging and failure of the drill strings and threatens the safety of drilling seriously. In order to effectively control the stick-slip vibration of the drill string, a new type of torsional vibration tool is proposed in this paper firstly. Then, the theoretical model of the drill string system based on the tool is established. And then, the viscosity reduction characteristics of the new torsional vibration tool are studied by the PID control method. Finally, field tests were carried out in comparison with simulation. The results show that the new torsional vibration tool can reduce the stick-slip vibration. And the two PID control equations can both control the drill bit speed in real time through changing the turntable speed. The results also have important reference significance for reducing and controlling the stick-slip vibration of the drill string and improving the rock-breaking efficiency.

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“…And the current research method does not combine the drill string with the drill bit for analysis. The downhole working conditions are complex, and the corresponding axial vibration research is of great significance for the drilling speed increase [25][26][27][28][29][30][31]. However, the current research does not link the BHA (bottom hole assembly) with the drill string to study its effect on increasing the drilling rate.…”

Section: Introductionmentioning

confidence: 98%

Study on the mechanism of drilling speed increase considering the axial vibration of drill string

Tian

Wei

Dai

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Based on the existing research and combining with downhole conditions, this paper proposes a new type of downhole vibration tool to increase the rate of penetration (ROP), shorten the drilling and completion cycle and achieve more productive operations. As a whole, the axial vibration of the drill string is analyzed uniformly and the ROP is increased. A dynamic analysis model of the axial vibration of the drill string in the horizontal well is established. Based on the research on the working mechanism of the tool, this paper analyzes the flow area, pressure drop and axial force of the core valve system and determines the change law of the axial force. The field experiments verified the correctness of the established dynamic model method and the rationality of the tool and showed that the tool has a significant effect of increasing the ROP. The theoretical model established in this paper can improve the understanding of drill string dynamics. The proposed design method can provide ideas for the development of new drag reduction and speedup tools, and the calculation results can provide a reference for the determination and optimization of key parameters for drilling speedup.

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Dynamic Research and Experimental Analysis of a New Downhole Drilling Tool

Cited by 20 publications

References 18 publications

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Electromagnetic Field Analysis and Shielding Method of Underground Variable Frequency Power Cable

Analysis of stick-slip reduction for a new torsional vibration tool based on PID control

Study on the mechanism of drilling speed increase considering the axial vibration of drill string

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