In-situ digital profiling of soil to rock strength from drilling process monitoring of 200 m deep drillhole in loess ground

Wang, X.F.; Zhang, M.S.; Yue, Z.Q.

doi:10.1016/j.ijrmms.2021.104739

Cited by 30 publications

(6 citation statements)

References 18 publications

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“…8 . These values are obtained in different ground conditions, different hydraulic drilling machines and drill bits by digitalization method 19 , 29 , 30 . The digitalization results illustrate that the variations of drilling speed measured by factual drilling data are compatible and consistent with the properties of different geomaterials from different ground conditions, different hydraulic drilling machines and drill bits.…”

Section: Digitalization Methods For Zoning the In-situ Mechanical Pro...mentioning

confidence: 99%

“…8. These values are obtained in different ground conditions, different hydraulic drilling machines and drill bits by digitalization method 19,29,30 . The digitalization results illustrate that the variations of drilling speed measured by factual drilling data are According to the British and European Standard 31 , the drilling speed is related to the mechanical strength of drilled formation.…”

Section: Digitalization Methods For Zoning the In-situ Mechanical Pro...mentioning

confidence: 99%

“…Recently, more and more researchers pay attention to the drilling data in real-time series. The real-time drilling data can identify the weak zones in volcanic rock 17 , 18 and profile the soil to rock strength in loess tableland 19 . Wang et al studied the method for measuring rock mass characteristics by laboratorial real-time drilling data 20 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Digitalization of hydraulic rotary drilling process for continuously mechanical profiling of siliciclastic sedimentary rocks

Wang

Zhang

Yue

et al. 2023

Sci Rep

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Hydraulic rotary drilling can offer the essential information and core samplesa for the researches on solid earth. Recording the factual field drilling data and analyzing the hydraulic rotary coring process are challenging yet promising to utilize the massive drilling information in geophysics and geology. This paper adopts the drilling process monitoring (DPM) technique and records the four parameters of displacement, thrust pressure, upward pressure, and rotation speed in real-time series for profiling the siliciclastic sedimentary rocks along 108 m deep drillhole. The digitalization results with 107 linear zones represent the spatial distribution of drilled geomaterials including superficial deposits (fill, loess, gravelly soil), mudstone, silty mudstone, gritstone, and fine sandstone. The constant drilling speeds varying from 0.018 to 1.905 m/min present the in-situ coring resistance of drilled geomaterials. Furthermore, the constant drilling speeds can identify the strength quality of soils to hard rocks. The thickness distributions of the six basic strength quality grades are presented for all the sedimentary rocks and each individual type of the seven soil and rocks. The in-situ strength profile determined in this paper can be used to assess and evaluate the in-situ mechanical behavior of geomaterial along the drillhole and can provide a new mechanical-based assessment for determining the spatial distribution of geological strata and structures in subsurface. They are important since the same stratum at different depths can have different mechanical behavior. The results provide a novel quantitative measurement for continuously in-situ mechanical profiling by digital drilling data. The findings of the paper can offer a new and effective method for refinement and upgrading of in-situ ground investigation, and can provide researchers and engineers with a novel tool and valuable reference to digitize and utilize factual data of current drilling projects.

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Section: Digitalization Methods For Zoning the In-situ Mechanical Pro...mentioning

confidence: 99%

“…8. These values are obtained in different ground conditions, different hydraulic drilling machines and drill bits by digitalization method 19,29,30 . The digitalization results illustrate that the variations of drilling speed measured by factual drilling data are According to the British and European Standard 31 , the drilling speed is related to the mechanical strength of drilled formation.…”

Section: Digitalization Methods For Zoning the In-situ Mechanical Pro...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Digitalization of hydraulic rotary drilling process for continuously mechanical profiling of siliciclastic sedimentary rocks

Wang

Zhang

Yue

et al. 2023

Sci Rep

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“…Under the influence of ground stress and mining, gas extraction boreholes are prone to collapse and deformation, which seriously affects gas management [10,11]. Borehole monitoring is a prerequisite to solving the problem of borehole collapse, can obtain the status information of the borehole, and can effectively prevent the occurrence of borehole collapse, as well as provide services to optimize the arrangement of the borehole, playing a positive role in deepening the process of drilling refinement operation, and greatly improving the effect of gas extraction in a borehole [12][13][14][15]. In order to meet the increasingly rigorous engineering research environment and achieve the goal of accurate drilling support, it is important to carry out research on accurate monitoring of the in-hole conditions of gas extraction boreholes.…”

Section: Introductionmentioning

confidence: 99%

Research on Hole Collapse Monitoring Technology of Coal Seam Gas Extraction Boreholes

et al. 2023

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It is difficult to monitor the collapse position of a gas extraction borehole in a coal seam. In order to solve this problem, a fiber-optic grating collapse monitoring technology was proposed. Five kinds of grating arrangements (0°, 45°, 90°, 135°, 180°) were examined to simulate the hole collapse. The relationship model between the center wavelength offset and the amount of collapsed coal and extraction flow was constructed to obtain the distribution curve of the hole collapse position and quality along the length of the hole, and flow decay rates of 80% and 50% were used as the critical values to classify the three levels of hole collapse. The results show that the hole collapse monitoring accuracy is the highest with the grating measurement points located below the substrate material arrangement. Finally, the effectiveness of fiber-optic grating monitoring technology was verified in the 2202 working face of the Changcun coal mine of the Lu’an Group, and the pure amount of gas extraction from the repaired borehole after monitoring was increased by 62.6% compared with that before the repair.

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“…This system monitors and collects parameters such as drill bit displacement, drill rod rotation speed, and oil inlet and outlet oil pressures of the drilling rig based on time series (not depth series). By analyzing the collected data, the drilling depth-time curve of the net drilling process is obtained, the slope of which is the penetration rate [21]. Figure 1 is a schematic diagram of the DPM system installed on the drilling rig without damage.…”

Section: Introductionmentioning

confidence: 99%

A Novel Borehole Cataloguing Method Based on a Drilling Process Monitoring (DPM) System

et al. 2022

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Borehole cataloguing is an important task in geological drilling. Traditional manual cataloguing provides the stratification of underground boreholes based on changes in core lithology. This paper proposes a novel borehole cataloguing method using a drilling process monitoring (DPM) system. This DPM cataloguing method stratifies a borehole according to the drilling speed through the rock. A 102 m borehole was drilled and cored in Baota district, Yan’an city, Shaanxi Province, China. The rock-breaking response parameters of the drill bit displacement, drill rod rotation speed and inlet pipe and outlet pipe oil pressures were monitored throughout the drilling process, and the drilling depth-penetration rate curve during the net drilling process was obtained. The changes in drilling speed show that the DPM cataloguing can identify the depths of the layer interfaces of the borehole and describe the stratification. The interface depth values obtained by DPM have little difference from the interface depth values obtained by manual cataloguing, and the errors are between −0.04% and 4.29%. From the DPM stratification results, the engineering quality evaluation of the rock mass can be realized without coring. DPM is fast, convenient, accurate, can greatly improve the efficiency of existing catalogues, and can be applied to scientific research in any underground space. DPM is a measurement-while-drilling technology. According to DPM data, the operating state of a drilling rig and the parameter changes while drilling can be obtained in situ and in real time throughout the drilling process.

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In-situ digital profiling of soil to rock strength from drilling process monitoring of 200 m deep drillhole in loess ground

Cited by 30 publications

References 18 publications

Digitalization of hydraulic rotary drilling process for continuously mechanical profiling of siliciclastic sedimentary rocks

Digitalization of hydraulic rotary drilling process for continuously mechanical profiling of siliciclastic sedimentary rocks

Research on Hole Collapse Monitoring Technology of Coal Seam Gas Extraction Boreholes

A Novel Borehole Cataloguing Method Based on a Drilling Process Monitoring (DPM) System

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