The effects of inclined particle water jet on rock failure mechanism: Experimental and numerical study

Li, Lei; Wang, Fangxiang; Li, Tianyang; Dai, Xiaodong; Xing, Xueyang; Yang, Xiancheng

doi:10.1016/j.petrol.2019.106639

Cited by 24 publications

(5 citation statements)

References 39 publications

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“…optimal well trajectory in directional drilling (Abdideh and Dastyaft 2021). Li et al analyzed the rock-breaking process of inclined particle jet and water jet and proposed that large-area crushing is caused with combined action of direct impact and radial tension (Li et al 2020c). Based on the SPH-FEM method, the damage evolution process of rock under particles jet impact was simulated in our previous researches (Ren et al 2020), and the damage process presented the cycle process of "damage-cumulative damage-failure-cumulative damage-failure", and rock failure is mainly represented shear macro fracture and tensile crack (Fig.…”

Section: Rock-breaking Mechanism Of Particle Jet Impactmentioning

confidence: 99%

Progress and development of particle jet drilling speed-increasing technology and rock-breaking mechanism for deep well

Fang

Ren

Liu

et al. 2021

J Petrol Explor Prod Technol

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Increasing drilling speed and efficiency of hard formation for deep and ultra-deep well is one of the international recognized drilling problems and key technologies to be tackled urgently. Particle jet impact drilling technology is an efficient non-contact rock-breaking method to overcome slow drilling speed, which has great development and application potential in drilling speed-increase of hard formation and deep well. High efficiency drilling technology and rock-breaking speed-increase mechanism in high temperature, high pressure and high hardness formations of deep and ultra-deep wells were mainly focused and keynoted in this paper. With extensive investigation of domestic and foreign literature, the working principle, key technical devices, deep-well-rock mechanical characteristic, unconventional constitutive model and rock-breaking mechanism of particle jet impact drilling technology were analyzed, which proved the feasibility and high efficiency for deep and hard stratum, and also, dynamic failure mechanism of rock needs to be elaborated by constructing the constitutive model with high temperature and pressure. Meanwhile, the major problems to be solved at present and development direction future were summarized, which mainly included: miniaturization of drilling equipment and individualization of drilling bit; optimization of jet parameters and the evaluation method of rock-breaking effect; establishment of mechanical property and unconventional constitutive model of deep-well-rock; rock-breaking mechanism and dynamic response under particle jet coupling impact. The research can help for better understanding of deep-well drilling speed-increasing technology and also promote the development and engineering application of particle jet impact drilling speed-increase theory and equipment.

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Section: Rock-breaking Mechanism Of Particle Jet Impactmentioning

confidence: 99%

Progress and development of particle jet drilling speed-increasing technology and rock-breaking mechanism for deep well

Fang

Ren

Liu

et al. 2021

J Petrol Explor Prod Technol

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“…So, compared with the free-air environment, the impinge efficiency of a single-phase water jet in a submerged environment is relatively poor. To improve the impinge capability of water jet in the submerged environment, scholars and engineers have made many efforts, such as adding abrasive into the water, 14,15 mixing gas into water. 16,17 Although the impinge capability of an abrasive jet is strong, the wear of the abrasive on nozzle wall is very serious.…”

Section: Introductionmentioning

confidence: 99%

Flow field characteristic of water jet with air ring protective layer under submerged environment and the orthogonal optimization of nozzle structure

Zhang

et al. 2022

Energy Science & Engineering

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A water jet with an air ring protective layer is a promising rock-breaking and cutting rate improvement method in submerged environment, such as oil-gas drilling. The jet flow field characteristic determines the jet impinge performance and is affected by nozzle structure parameters. In this study, the water jet flow with air ring under submerged environment was numerically simulated. The jet flow field structure with air ring was obtained by analyzing the distributions of jet velocity and air content at different cross sections. The effects of several critical nozzle structure parameters on jet isokinetic core length and axial velocity were investigated by adopting the orthogonal design method. The results show that the jet flow field structure with air ring in radial direction includes a high-speed water jet zone, air ring protective layer, and air-water mixed zone, having the advantages of concentrated energy in axis region, long core section length, and lowvelocity attenuation. The influence degrees of nozzle structure parameters on jet core section length and axial velocity at X = 0.3 m are: length-diameter ratio > outlet diameter > conic angle > air nozzle diameter > water-air nozzle spacing and outlet diameter > length-diameter ratio > conic angle > water-air nozzle spacing > air nozzle diameter, respectively. The jet core section length and axial velocity both increase exponentially with the increasing outlet diameter, both first increase rapidly and then slowly decreases with the increase of conic angle and water-air nozzle spacing. There is the optimal conic angle of 15°and appropriate water-air nozzle spacing of 3-5 mm. With the increase of length-diameter ratio, they both first decrease rapidly and then slow down, indicating that conical nozzle is more suitable for water jet with air ring. And 0.9-1.2 mm is proper for the air nozzle diameter.

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“…Moonho and Taehyo [18] and Alessandro and Khamis [19] utilized the method to carry out the three-dimensional modeling of orthogonal cutting. Using the SPH-FEM coupling method, Wang et al [20] carried out the numerical simulation of the water inrush of a tunnel during blasting, and Li et al [21] revealed the rock failure mechanism and the effect of confining pressure for vertical and inclined particle jet impacts. e abovementioned research provided a basis for the modeling of an AWJ impacting rock.…”

Section: Introductionmentioning

confidence: 99%

Failure Mechanism and Effect of Nozzle Parameters on Abrasive Water Jet Rock Breaking

Zhu

2021

Shock and Vibration

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Abrasive Water Jet (AWJ) technology has vast application prospects in the assisted drill-blasting of tunnel excavation, with the advantages of fast-breaking speed, low tool wear, less dust, and good mobility. Nevertheless, AWJ technology has some limitations and shortcomings, such as the small effective fracturing range and parameter mismatch, which influence the fracturing effect of AWJ. To solve the abovementioned issues, it is necessary to study the failure mechanism of rock impacted by AWJ and nozzle parameter effects on rock fragmentation. Based on the coupling algorithm of Smooth Particle Hydrodynamics and Finite Element Method (SPH-FEM), in this research, the numerical model of AWJ impacting rock was established, and the result was verified with Computed Tomography (CT) scanning after the AWJ impacting rock experiment and image processing technology. Through the analysis of the stress characteristics of typical particles in the rock model at different stages and positions, the formation and expansion mechanisms of the crater and the cracks were revealed. Additionally, in this research, the comprehensive damage factor of rock (X) representing the fragmentation degree was defined. By comparatively analyzing X-values with certain technical parameters of AWJ, the importance ranking of the nozzle parameters, the effect of each nozzle parameter on the rock fragmentation, and the optimal parameter combination were also investigated.

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The effects of inclined particle water jet on rock failure mechanism: Experimental and numerical study

Cited by 24 publications

References 39 publications

Progress and development of particle jet drilling speed-increasing technology and rock-breaking mechanism for deep well

Progress and development of particle jet drilling speed-increasing technology and rock-breaking mechanism for deep well

Flow field characteristic of water jet with air ring protective layer under submerged environment and the orthogonal optimization of nozzle structure

Failure Mechanism and Effect of Nozzle Parameters on Abrasive Water Jet Rock Breaking

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