Crack propagation in rock upon impact

Bolobov, V. I.; Plaschinsky, A. A.; Le-Thanh, B.

doi:10.17580/or.2019.06.01

Cited by 3 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The joint action of the axial and transverse components of vibration accelerations is described based on considerations of the accumulation of fatigue stresses in the rock according to the Palmgren-Miner theory [56]. To calculate the energy efficient load, we use Equation (35). Taking into account the calculated coefficients k and β, the G will be To determine the combined effect of axial and transverse shocks, it is necessary to determine the average depth of cut in the interval under consideration [54,55].…”

Section: Results Of Research and Analysis Of Developed Algorithmsmentioning

confidence: 99%

“…and transverse components of vibration accelerations is described based on considerations of the accumulation of fatigue stresses in the rock according to the Palmgren-Miner theory [56]. To calculate the energy efficient load, we use Equation (35). Taking into account the calculated coefficients k and , the G will be Figure 13a shows that the recommended WOB in the interval of 950-1000 m is 100-120 kN, when the dynamic WOB is minimal.…”

Section: Results Of Research and Analysis Of Developed Algorithmsmentioning

confidence: 99%

“…To calculate the elastically deformable rod, the work considers axial vibrations arising in the BHA, considering the DS to be a spring [31][32][33][34][35].…”

Section: Development Of Algorithms For Association Of Axial and Trans...mentioning

confidence: 99%

“…Initially, the concept of mechanical specific energy for rotating drilling was proposed by Teale in 1965 [42]. The total MSE is presented in the form of axial and rotational components and is expressed as follows (34) and (35):…”

Section: Analysis Of the Drilling Process Performancementioning

confidence: 99%

See 3 more Smart Citations

Development of Monitoring and Forecasting Technology Energy Efficiency of Well Drilling Using Mechanical Specific Energy

et al. 2022

View full text Add to dashboard Cite

This article is devoted to the development of technology for improving the efficiency of directional well drilling by predicting and adjusting the system of static and dynamic components of the actual weight on the bit, based on the real-time data interpretation from telemetry sensors of the bottom hole assembly (BHA). Studies of the petrophysical and geomechanical properties of rock samples were carried out. Based on fourth strength theory and the Palmgren–Miner fatigue stress theory, the mathematical model for prediction of effective distribution of mechanical specific energy, using machine learning methods while drilling, was developed. An algorithm was set for evaluation and estimation of effective destruction of rock by comparing petrophysical data in the well section and predicting the shock impulse of the bit. Based on the theory provided, it is assumed that the given shock impulse is an actual representation of an excessive energy, conveyed to BHA. This excessive energy was quantitively determined and expressed as an adjusting coefficient for optimal weight on bit. The developed mathematical and predictive model helps to identify the presence of ineffective rock destruction and adjust drilling regime accordingly. Several well drilling datasets from the North Sea were analyzed. The effectiveness of the developed mathematical model and algorithms was confirmed by testing well drilling data.

show abstract

Section: Results Of Research and Analysis Of Developed Algorithmsmentioning

confidence: 99%

Section: Results Of Research and Analysis Of Developed Algorithmsmentioning

confidence: 99%

“…To calculate the elastically deformable rod, the work considers axial vibrations arising in the BHA, considering the DS to be a spring [31][32][33][34][35].…”

Section: Development Of Algorithms For Association Of Axial and Trans...mentioning

confidence: 99%

Section: Analysis Of the Drilling Process Performancementioning

confidence: 99%

See 2 more Smart Citations

Development of Monitoring and Forecasting Technology Energy Efficiency of Well Drilling Using Mechanical Specific Energy

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The theoretical framework of the impact destruction of rocks is described by both Russian and foreign scientists [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Penetration of an impact tool in rocks is modeled mathematically, and the energy input of rock fracture and the impact machine capacity are estimated [34][35][36]. In the meanwhile, the influence of the impact tool blunting on the impact efficiency lacks proper attention.…”

Section: Introductionmentioning

confidence: 99%