Impact Dynamics Prediction of a Rotary-Percussive Ultrasonic Drill With a Free Mass

Bai, Deen; Quan, Qiquan; Wang, Yinchao; Li, He; Zhao, Pengyue; Deng, Zongquan

doi:10.1109/access.2018.2842747

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Tungsten steel drill tools can penetrate basalt with compressive strengths exceeding 200 MPa, enhancing their suitability for drilling into rocks with unknown compressive strengths on the surface of the asteroid. We have carried out a detailed theoretical analysis of parameter determination of the drilling tool assembly in the literature [32]. The dimensions of the individual parts of the UPD are provided in Table I.…”

Section: A Configuration Of the Ultrasonic Percussive Drillmentioning

confidence: 99%

Passive Versus Active Control of Weight-on-Bit for an Ultrasonic Percussive Drill

Wang,

Li,

Quan

et al. 2024

IEEE/ASME Trans. Mechatron.

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Multiple ultrasonic percussive drill cross-drilling anchoring helps to achieve long-term, secure attachment of sampling platforms in extreme environments. Ultrasonic percussive drills require less weight-on-bit (WOB) and lower power than conventional drills, making them more suitable for asteroid anchoring mission. Choosing a suitable WOB control method is one of the key factors to ensure rapid and stable drilling, but there is little research on the effect of WOB control method on ultrasonic drilling performance. To address the technical challenges of drilling, this paper investigates the effects of passive and active WOB control on ultrasonic drilling performance. Firstly, the mechanical configuration of an ultrasonic percussive drill is presented and a full-wavelength piezoelectric transducer is designed using impedance analysis (IA) and Experimental Modal Analysis (EMA). Then, passive control of WOB is implemented using suspended weights, and active control is implemented using a linear actuator. Finally, the effect of the WOB control method on drilling performance is experimentally verified on rocks with different compressive strengths. Our results show that active control is better suited to WOB variation and rock compressive strength variation. When the WOB is 5 N, the drilling rate of passive control is slightly higher than that of active control, but the difference is not significant. When the WOB is 10 N and 15 N, the drilling rate of active control surpasses that of passive control. The ultrasonic percussive drill's power consumption is less than 60 W. This paper provides a technical reference for selecting the WOB method for ultrasonic percussive drills in planetary exploration.

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Section: A Configuration Of the Ultrasonic Percussive Drillmentioning

confidence: 99%

Passive Versus Active Control of Weight-on-Bit for an Ultrasonic Percussive Drill

Wang,

Li,

Quan

et al. 2024

IEEE/ASME Trans. Mechatron.

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“…Compared with rotary drilling, lower weight on bit (WOB) and slower speed of rotation are required for DTH drilling under the same stratum conditions [22,23]. In air DTH hammer normal circulation drilling, compressed air is injected into the central passageways of drill pipes to drive DTH hammer working and carries rock cuttings out of the borehole along annulus clearance between drill pipes and borehole wall.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Analysis of a Split Drill Bit for Pneumatic DTH Hammer Percussive Rotary Drilling

Shi,

2024

Geofluids

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Reverse circulation impact drilling has the advantages of high drilling efficiency and less dust, which can effectively form holes in hard rock and gravel layer. As integral reverse circulation drill bits used in the conventional down-the-hole (DTH) hammers are only suitable for specific formations, the whole set of DTH hammer needs to be replaced when drilling different formations. In this paper, several types of split drill bits for different drilling technologies are designed. The flow field characteristics of one of the split drill bits is analyzed based on the computational fluid dynamics (CFD) method, with four technic parameters considered, which are input flow rate, number of inlet holes, angle of injection exhaust holes, and diameter of injection exhaust holes, respectively. Three parameters are selected as indicators to evaluate the rationality and performance of the split drill bit, which are injection exhaust hole outlet mass flow rate, ratio of the mass flow rate out of injection exhaust holes to the whole inlet mass flow rate, and maximum pressure at the upper end of the split drill bit. According to the CFD analysis results, the above four technic parameters influence the flow rate and pressure in different rules. Considering the injection capacity, pressure loss, and bit strength, inlet holes of 10, injection exhaust holes with an angle of 50°, and injection exhaust holes with a diameter of 12 mm are recommended to obtain ideal reverse circulation. Different types of split drill bits were manufactured, and drilling experiments were carried out in unconsolidated formations. The maximum drilling rate can reach 1.5 m/min in the drilling experiments. The split drill bit proposed in this paper exhibits excellent adaptability for reverse circulation drilling in loose formations.

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Advances in Extraterrestrial Drilling Technology to Discover the Secrets Hidden Inside Celestial Bodies

Zhang

Wei

et al. 2022

Space Sci Rev

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Impact Dynamics Prediction of a Rotary-Percussive Ultrasonic Drill With a Free Mass

Cited by 6 publications

References 30 publications

Passive Versus Active Control of Weight-on-Bit for an Ultrasonic Percussive Drill

Passive Versus Active Control of Weight-on-Bit for an Ultrasonic Percussive Drill

Simulation and Analysis of a Split Drill Bit for Pneumatic DTH Hammer Percussive Rotary Drilling

Advances in Extraterrestrial Drilling Technology to Discover the Secrets Hidden Inside Celestial Bodies

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