The rock breaking mechanism analysis of rotary percussive cutting by single PDC cutter

Liu, Weiji; Zhu, Xiaohua; Li, Bo

doi:10.1007/s12517-018-3530-6

Cited by 31 publications

(15 citation statements)

References 21 publications

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“…In the research of coal cutting performance, Che et al [18] studied the regularity from the perspective of motion form. Bilgin et al [19] and Liu et al [20] studied coal cutting performance when the cutter worked in linear motion, and the model of linear motion can be seen in Fig. 1a.…”

Section: Cutting Conditionsmentioning

confidence: 99%

Research of Response Difference on Coal Cutting Load under Different Cutting Parameters

Wan¹,

Jiang²,

Gao³

et al. 2019

SV-JME

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Cutting performance is always an important direction in coal research, and it is related to different structural and working parameters. However, most references tend to judge the effectiveness of optimizations with a mean value method while not taking the randomness of load into consideration. Based on this, the paper provides a method to judge the effectiveness of optimizations based on stochastic load fluctuations. Before providing the method, the shearer drum is established, and cutting performance is studied under a different number of conical picks, mounting angles, and cutting positions. To make judgments of optimization effectiveness, we find that only when the "fluctuation by structure" is larger than "fluctuation by randomness" can we make sure that the optimization is valid. Results indicate that the optimization of cutting position variations on cutting performance is invalid. In addition, the order of impact on cutting performance from strong to weak is the number of conical picks, the mounting angles, and cutting positions. The present paper provides a new idea for judging of the effectiveness of structure optimizations from the perspective of load randomness, and it is conductive to enrich related research on coal cutting.

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Section: Cutting Conditionsmentioning

confidence: 99%

Research of Response Difference on Coal Cutting Load under Different Cutting Parameters

Wan¹,

Jiang²,

Gao³

et al. 2019

SV-JME

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“…The rotary-percussion drilling technique has been known for its economic viability combined with an increased rate of penetration. It is generally recommended for the use in hard, abrasive rock formations due to its rock-fracturing efficiency [2, [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…The rotary-percussion method has been widely studied in order to further enhance its benefits. It has been proven that the rate of penetration can be increased by over 30% by using the rotary-percussion drilling method in comparison to the conventional rotary drilling method [7][8][9]. Derdour et al [10] presented their work on penetration rate optimization of rotary-percussion drilling in the Hadjer Soud quarry.…”

Section: Introductionmentioning

confidence: 99%

“…They concluded that air pressure had the most impact on the rate of penetration, followed by the specific advance pressure, as well as proved that the analyses used were effective in practical applications. Liu et al [7] stated that by adjusting the impulse frequency, higher drilling efficiency could be obtained. Wu and Ye [6] noted that the impulse load and the speed of bit rotation had a significant influence on the efficiency of rock fracturing, while the impact of impulse frequency was smaller in comparison.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells

et al. 2021

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The rotary-percussion drilling method is a prospective way to decrease drilling costs. It is obvious, based on literature analyses and finished geothermal drilling, that the Lublin Basin can be perceived as the one where rotary-percussion drilling can be used to drill an overburden of shale rocks. The paper explained the geology of the Lublin Basin, its’ geological structures, and the possibility of the use of drilling with a down-the-hole hammer, which could significantly decrease the cost of the whole shale gas drilling investment. Data collected from the wells drilled in the Lublin Basin were compared and analyzed to determine the viability of rotary-percussion drilling. Provided analyses showed that using the rotary-percussion drilling method in the Lublin Basin had a greater possibility of application than in other Polish shale basins (Baltic and Podlasie).

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“…Bit-rock interaction is also an important part in the horizontal well [4,[18][19][20]. Kovalyshen applies drag-bit model to study coupled axial-torsional vibration.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Model and Quantitative Analysis of Stick-Slip Vibration in Horizontal Well

Wang

Ren

2020

Shock and Vibration

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Stick-slip is very harmful to the service life of drillstring. The extended Hamilton principle is applied in the paper. Then, finite element method (FEM) is employed to describe the model. The drillstring-borehole impact and friction, fluid-structure interaction, bit-rock interaction, and gravity are considered in this model. The influence of axial and torsional excitation on stick-slip is analyzed. The nonlinear motion predicted by the model is consistent with the observation results in the experiments. The research shows that the fluctuation amplitude of the bit angular velocity also increases along with the increase of driving angular velocity (torsional excitation). However, both the ratio of the maximum angular velocity of the stick-slip vibration and the fluctuation of the angular velocity are continuously reduced. Meanwhile, the strength of the stick-slip vibration has a tendency to slow down. As the axial load (axial excitation) increases, the fluctuation of the maximum angular speed of the stick-slip vibration does not change significantly, but the smaller load causes a smaller stick duration.

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The rock breaking mechanism analysis of rotary percussive cutting by single PDC cutter

Cited by 31 publications

References 21 publications

Research of Response Difference on Coal Cutting Load under Different Cutting Parameters

Research of Response Difference on Coal Cutting Load under Different Cutting Parameters

Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells

Dynamic Model and Quantitative Analysis of Stick-Slip Vibration in Horizontal Well

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