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Relevant bibliographies by topics / Rotary percussion drilling

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Academic literature on the topic 'Rotary percussion drilling'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Rotary percussion drilling"

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Li, Peng, Hui Zhang, Shengyuan Jiang, and Weiwei Zhang. "Analysis and Testing of Load Characteristics for Rotary-Percussive Drilling of Lunar Rock Simulant with a Lunar Regolith Coring Bit." Shock and Vibration 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/3012749.

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Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the rotational velocity, the penetration rate, and the percussion frequency) on the drilling load. The process of rotary drilling into lunar rock using an LRCB is modeled as an interaction between an elemental blade and the rock. The rock’s fracture mechanism during different stages of the percussive mechanism is analyzed to create a load forecasting model for the cutting and percussive fracturing of rock using an elemental blade. Finally, a model of the load on the LRCB is obtained from the analytic equation for the bit’s cutting blade distribution; experimental verification of the rotary-impact load characteristics for lunar rock simulant with different parameters is performed. The results show that the penetrations per revolution (PPR) are the primary parameter influencing the drilling load. When the PPR are fixed, increasing the percussion frequency reduces the drilling load on the rock. Additionally, the variation pattern of the drilling load of the bit is in agreement with that predicted by the theoretical model. This provides a research basis for subsequent optimization of the drilling procedure and online recognition of the drilling process.

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Sliwa, Tomasz, Aneta Sapińska-Śliwa, Michał Korzec, Andrzej Gonet, Marek Jaszczur, Martyna Ciepielowska, and Artur Gajdosz. "Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells." Energies 14, no. 10 (May 11, 2021): 2734. http://dx.doi.org/10.3390/en14102734.

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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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KARASAWA, Hirokazu, Koji SUZUKI, and Koji TAKAHASHI. "Rock Drillability in Rotary-Percussion Drilling." Journal of MMIJ 125, no. 1 (2008): 13–20. http://dx.doi.org/10.2473/journalofmmij.125.13.

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Neskoromnykh, V. V., A. E. Golovchenko, and M. S. Popova. "Modernization of rock-cutting tool for rotary-percussion drilling that implements eccentric application of impact pulses." Proceedings of higher educational establishments. Geology and Exploration, no. 5 (November 28, 2019): 64–69. http://dx.doi.org/10.32454/0016-7762-2019-5-64-69.

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Rotary percussion drilling with pneumatic hammers is a promising, high-performance method widely used in the practice of geological exploration, the performance of which is determined mainly by pressure and the amount of cleaning agent supplied by the compressor. The parameters of commercially available high-pressure compressors do not allow drilling at a depth of more than 300 meters, which is one of the main limiting factors of its practical application in production conditions. One of the ways to improve the performance of the rotary-percussion drilling of wells, and at the same time the maximum depth of drilled wells is to improve the mechanism of rock destruction by applying eccentric impact pulses to the drilling tool, which will make it possible to implement more actively the tangential component of the impact pulse that affects the shape and the volumes of the fracture holes being formed, providing additional splitting of the rock in the direction of the rock face. The paper discusses the ways to perfect the known designs of bits for rotary-percussion drilling of wells implementing eccentric application of impact impulses, issues of geometric substantiation of the shape of an eccentric protrusion on a drill bit torus shim for rotary-percussion drilling and oscillations of torus shim when transmitting eccentric impact pulses from the point of view of enhancement durability of a construction and accuracy of transfer of eccentric impact pulses.

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Xiao, Yingjian, Charles Hurich, and Stephen D. Butt. "Characterization of rotary-percussion drilling as a seismic-while-drilling source." Journal of Applied Geophysics 151 (April 2018): 142–56. http://dx.doi.org/10.1016/j.jappgeo.2018.02.021.

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Huang, Zhi Qiang, Qin Li, Yong Tao Fan, Zhen Qiang Wei, and Hai Yan Zhu. "Study on Mechanism of Hammer Bit and Rock Interaction in Geophysical Prospecting Percussion Drilling." Advanced Materials Research 291-294 (July 2011): 2266–71. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2266.

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Percussion drilling has been widely used in oil and gas industry, yet it still has some shortcomings, such as severe damages to drilling tools, low energy transferring efficiency and low rock-fragmenting efficiency. Thus it is necessary to reveal the mechanism of interactions between the hammer bit and rock in geophysical prospecting percussion drilling. Taking account of the coupling effect of the Weight on Bit (WOB), impact force and rotary torque, this paper constructed a Finite Element Method (FEM) model using the finite element analysis software (ANSYS/LS-DYNA) and conducted a computer simulation of bit-rock interaction under rotating and simple impact effect, which showed the rock-fragmenting process of hammer bit and the curves of volume-time and depth-time of craters as well as the effective stress-time curves of the centre tooth, second-row tooth and peripheral tooth. The results showed that: the percussion drilling process under rotating impact effect is characterized as four fundamental processes; the crater depth mainly depends on impact force rather than rotary torque; the crater created under rotating impact effect is twice the volume of that under impact effect; the effective stress of each tooth changes severely: the stress of second-row tooth is the largest, centre tooth the second, and peripheral tooth the smallest. This study provided a guide for the structural optimization of hammer bit and general applications of percussion drilling.

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Oparin, V. N., V. V. Timonin, and V. N. Karpov. "Quantitative estimate of rotary–percussion drilling efficiency in rocks." Journal of Mining Science 52, no. 6 (November 2016): 1100–1111. http://dx.doi.org/10.1134/s1062739116061637.

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Muro, Tatsuro. "Drilling rate of rotary percussion drill bits and rock characteristics." Journal of Terramechanics 25, no. 3 (January 1988): 191–99. http://dx.doi.org/10.1016/0022-4898(88)90002-x.

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Sapińska-Śliwa, Aneta, Rafał Wiśniowski, Michał Korzec, Artur Gajdosz, and Tomasz Śliwa. "Rotary - percussion drilling method - historical review and current possibilities of application." AGH Drilling, Oil, Gas 32, no. 2 (2015): 313. http://dx.doi.org/10.7494/drill.2015.32.2.313.

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MURO, Tatsuro, Ryoichi FUKAGAWA, and Masahiro WATANABE. "Rotary percussion forces affecting a drilling rate of bit for rock mass." Doboku Gakkai Ronbunshu, no. 391 (1988): 206–13. http://dx.doi.org/10.2208/jscej.1988.391_206.

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Dissertations / Theses on the topic "Rotary percussion drilling"

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Chen, Jian, and 陳健. "Rock mass characterization: air-driven rotary percussive drilling process monitoring based approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41509006.

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Chen, Jian. "Rock mass characterization air-driven rotary percussive drilling process monitoring based approach /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41509006.

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Maolin, Liao. "Dynamic methods of stiffness identification in impacting systems for rotary-percussive drilling applications." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=230156.

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Stiffness identification of an impacted constraint is the main issue discussed in this thesis. Primarily, a change of stability (bifurcation) is used to determine the dynamical stiffness of an impacted beam for a piecewise-linear impact oscillator. Detailed one- and two-parameter bifurcation analyses of this impacting system are carried out by means of experiments and numerical methods. Particularly, the two-parameter numerical continuation of the obtained codimension-one bifurcation (period-doubling bifurcation, or fold bifurcation) indicates a strong monotonic correlation between the stiffness of the impacted beam and the frequency at which this bifurcation appears. In addition to the bifurcation techniques, another method for stiffness identification is analysis of impact duration. To accurately detect impact durations from numerical or experimental signals, nonlinear time series methods are utilised. Two impacting systems, including the piecewise-linear impact oscillator and a drillbit-rock vibro-impact system, are studied to demonstrate this proposed method. For either system, the impact duration is relatively constant when the response of oscillator is a period-one one-impact motion, and it is approximated as a half of the natural period of the oscillator-constraint system. When the mass of oscillator is constant, for an impacted constraint with a certain stiffness, the higher the stiffness, the lower the impact duration. This monotonic correlation provides another mechanism to estimate the stiffness of the impacted constraint. Based on the developed two dynamical methods for stiffness identification, a control algorithm for parameter adjustment of the axial vibration for rotary-percussive drilling applications is designed. This control algorithm aims to maintain the optimal drilling state under the varying formations. By this way, the efficiency of rotary-percussive drilling is expected to be promoted.

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Batako, Andre Danonu Lignanmateh. "A self-exciting system for percussive-rotary drilling." Thesis, Loughborough University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402958.

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FRANCA, LUIZ FERNANDO FURTADO DE MENDONCA PENNA. "SELF-EXCITED PERCUSSIVE-ROTARY DRILLING IN HARD ROCKS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=4510@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Uma linha de pesquisa de grande interesse no estudo de colunas de perfuração de poços de petróleo aponta para a necessidade de se aumentar a taxa de penetração (ROP) na perfuração em rochas duras. Procurando suprir tal necessidade, este trabalho tem como objetivo estudar mecanismos e propor um novo dispositivo, utilizando as próprias vibrações geradas na coluna durante a perfuração. As várias formas de vibrar da coluna são, geralmente, indesejadas durante a perfuração. Porém, é possível utilizar algumas destas formas de vibrar para melhorar a eficiência do processo de perfuração. Inicialmente, avalia-se a influência das vibrações torcional e axial na ROP. Posteriormente, estuda-se a perfuração na ressonância e alguns aspectos e cuidados no uso desta nova técnica de perfuração, que vem sendo desenvolvida por empresas do setor. Por fim, é desenvolvido um novo dispositivo de perfuração, chamado de perfuração com martelo em ressonância ou perfuração percussiva- rotativa auto-excitada. Este dispositivo tem como premissa usar a vibração axial gerada no processo de corte, para criar uma carga harmônica na broca e excitar uma massa de aço (martelo). Desenvolve-se um modelo com vibro-impacto e atrito seco, representando o martelo e a resistência da rocha, respectivamente. Faz-se aqui, um estudo numérico e uma validação experimental do movimento percussivo de um modelo que representa a broca com este novo dispositivo. Os resultados mostram que a melhor forma do dispositivo operar é impactando a cabeça da broca, em condição de período-1, com um impacto por ciclo de forçamento. Adicionalmente, os parâmetros do experimento são identificados e os resultados numérico-experimental são comparados, mostrando que são similares.
An area of interest in the study of drillstrings is due to the device of increasing the rate of penetration (ROP) in hard rocks. Trying to supply such necessity, this work aims to study mechanisms and to propose a new device, using vibrations generated in the drillstring itself. The various forms of drillstring vibrations are generally regarded as detrimental in the question. However, it is possible to use some of these vibrations forms in such a way as to enhance drilling performance. Initially, the influence of the torsional and axial vibrations in ROP is analyzed. Next, the resonance drilling, that is being developed by companies in this area, and some aspects and cares in the use of this new drilling technique are studied. At the end, a new drilling device, called resonance hammer drilling or self excited percussive rotary drilling, is developed. This device has as premise to use the axial vibration due to the cutting process, to generate a harmonic load at the bit and to excite a steel mass (hammer). A model with vibro-impact and dry friction is developed, representing the hammer and the resistance of the medium, respectively. It is presented a numeric study and an experimental validation of the percussive motion of the model, that represent the bit. The results show that the best way of the hammer to operate is impacting the bit head, in period-1 condition, ie, with one impact per cycle. Moreover, the experimental parameters are identified and since the numerical-experimental results are similar, the model used is validated.

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Kilfoil, Arthur Mark. "Water flushing of rock chips from horizontal holes drilled by rotary percussion." Thesis, 1997. https://hdl.handle.net/10539/26151.

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A project report submitted to the Faculty of Engineering, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering.
The flushing flow rate required to maximise penetration rate of holes drilled by rotary percussion is dependant on drilling parameters and chip size. Experimental work to determine the optimal flushing water flow rate for two common drilling situations was undertaken. It consisted of drilling, analysis of chip samples and flow visualization. A computer modal to predict flow rate was developed. Its output and the experimental results Were combined to explain the relationship between penetration rate and flow rate. All chips should be fiushed from the gap between the bit and the end of the hole in the time between hammer blows (ie. - within the duration of a percussion cycle). As flow rate increases, flushing improves and therefore penetration rate increases. Once flushing is adequate there is no mechanism for further increases in penetration rate, thus it remains constant and independent of further increases in flow.
Andrew Chakane 2018

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Books on the topic "Rotary percussion drilling"

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Marianowski, Jan. Transmisja energii uderzenia wzdłuż przemodu wiertniczego podczas wiercenia obrotowo-undarowego: Transmission of impact energy along a boring conduit during the rotary-percussive drilling. Kraków: Wydawnictwa AGH, 2012.

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Book chapters on the topic "Rotary percussion drilling"

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Marjoribanks, Roger. "drilling, rotary percussion bits Rotary Percussion and Auger Drilling." In Geological Methods in Mineral Exploration and Mining, 85–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-74375-0_6.

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Kim, Jongheon, Jinkwang Kim, and Hyun Myung. "Embedded Drilling System Using Rotary-Percussion Drilling." In Robot Intelligence Technology and Applications 5, 213–19. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78452-6_18.

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Senjoba, Lesego, Yoshino Kosugi, Masaya Hisada, and Youhei Kawamura. "Lithology identification during rotary percussion drilling based on acceleration waveform 1D convolutional neural network." In Rock Mechanics and Engineering Geology in Volcanic Fields, 435–41. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003293590-54.

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"rotary percussion drilling." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1145–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_183536.

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"rotary-percussion drilling equipment." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1146. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_183537.

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"percussive rotary drilling." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 976. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_160787.

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"rotary percussive drilling." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1146. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_183540.

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Carlos, Lopez Jimeno, Lopez Jimeno Emilio, Javier Ayala Carcedo Francisco, and Ramiro Yvonne Visser de. "Rotary percussive drilling." In Drilling and Blasting of Rocks, 8–35. Routledge, 2017. http://dx.doi.org/10.1201/9781315141435-2.

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"percussive rotary core drilling." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 976. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_160791.

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Carlos, Lopez Jimeno, Lopez Jimeno Emilio, Javier Ayala Carcedo Francisco, and Ramiro Yvonne Visser de. "Rotary percussive drilling accessories." In Drilling and Blasting of Rocks, 36–47. Routledge, 2017. http://dx.doi.org/10.1201/9781315141435-3.

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Conference papers on the topic "Rotary percussion drilling"

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Li, Bodong, Yulin Tu, Guodong David Zhan, Abdulwahab Aljohar, Ossama Sehsah, and Ke Ke. "Parameter Optimization and Application Evaluation of Rotary Percussion Drilling." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21253-ms.

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Abstract Rotary percussion drilling has gained increasing interest in the oil and gas industries because of its high drilling efficiency and good deviation control [1, 2]. In this work, a rotary percussion-based drilling tool is successfully deployed in a test well, and demonstrates a convincing enhancement of the rate of penetration (ROP). In the test, the rotary percussion tool drilled through a 12 1/4″ hole section with excellent ROP, under a high mud weight (MW) condition of 120 pcf (Pound per cubic feet). The result shows a 22% enhancement on average ROP, and 31% enhancement on instantaneous ROP comparing to the best performing offset well offset well drilled in the same condition. This paper covers the principle of a rotary percussion-based hammer tool, details in rotary percussion drilling parameters design and bit selection considerations for the effective coupling with the hammer tool. In addition, the paper uses an example of a high MW application to evaluate the overall performance of the tool in ROP enhancement.

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Quan, Qiquan, S. Li, S. Jiang, X. Hou, and Z. Deng. "Control of Drilling and Coring Device Based on Online Identification." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62804.

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This paper presents a drilling and coring device for the lunar exploration, which is possibly utilized to acquire the lunar regolith with a certain depth. The drilling device is composed of three components: rotary unit, percussive unit and penetrating unit. The rotary-percussion drill can work in two different operating modes: rotary mode and rotary-percussive mode, depending on the properties of cut object. In the relatively loose regolith, rotation and penetration can make the drill work in a well state. However, once rock is encountered in the drilling process, besides rotation and penetration, percussion must be launched to reduce the drilling power and the required penetrating force. Due to the indetermination of the lunar environment, it is not easy to control the coring drill to adapt to the encountered conditions. To obtain a high coring ratio with relatively low power, an intelligent drilling strategy is inevitably proposed to accomplish the drilling process control. Considering the lunar soil simulant should cover the possible composition of real lunar soil, simulant are classified into several levels based on the generalized drillability. For each level of drillability of lunar soil simulant, experiments are conducted to get the characteristics in frequency-domain of rotary torque output. The sampled characteristics of rotary torque output are utilized to train the object-recognition system based on Support Vector Machine (SVM). Information in all the levels of drillability of lunar soil simulant is stored in the object-recognition system as an expert system. To understand the properties of the drilling object, rotary torque is selected to identify the level of drillability of simulant in drilling process. Subsequently, once the level is obtained, drilling strategy is adjusted to adapt to the current level correspondingly in real time. Experiments are conducted to verify the intelligent drilling strategy successfully.

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Yulin, Tu, Bodong Li, Guodong Zhan, Rached M. Rached, and Eduardo Gramajo. "Study on Rotary Percussion Tool Parameters Optimization and Trial Test Evaluation." In International Petroleum Technology Conference. IPTC, 2023. http://dx.doi.org/10.2523/iptc-23005-ms.

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Abstract Drilling in hard and abrasive formation represents a major challenge due to the low rate of penetration (ROP). Rotary percussive drilling tools take advantage of both the shear action of drill bit cutters and axial percussion energy to increase the drilling efficiency. Such tools have shown a significant benefit in drilling efficiency enhancement, especially in air drilling with an air hammer. This study focuses on a fluid-type rotary percussive drilling tool development and application to address the significant drilling challenge in drilling hard and highly abrasive sandstone formations. A rock mechanical study is carried out to get the compressive strength and the internal friction of the hard and abrasive formation. Then, a 6-3/4 inch rotary percussive tool is designed and optimized based on a relationship between rock mechanics and the output energy and frequency of the tool. Next, the tool was thoroughly tested in the workshop, and the key parameters were acquired and compared with the design. The tool was trial tested in a hard and abrasive formation dominated by fine sandstone and siltstone in the upper section and a softer formation below. The new 6-3/4 inch tool was run in the test well and drilled DV tools, cement, float collar, and float shoe, then penetrated the hard and abrasive formation. The hammer drilled 912ft with an ROP of 10.5 ft/h with a pure drilling time of 87 hours. The ROP increase is around 30% for the same depth and formation with less WOB and RPM. Drilling efficiency was increased in the top section with less WOB and RPM compared with the same formation and depth of an offset well section drilled with hybrid bits. The differences of the wells in the hard abrasive formation thickness, bit type, BHA, bits dull grading, and RPM are studied. The tool performance evaluation and lessons learned from optimization and trial tests are summarized. The future direction of this work is also discussed.

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Peltokangas, Suvi, Sirpa Launis, Markus Saarela, and Jouni Mattila. "Modeling and Simulation of a Hydraulic Drill for Control System Design Purposes." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4290.

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In rock excavation processes, hydraulic rotary-percussive drilling is used for drilling and blasting in both surface and underground drilling operations. A hydraulic percussive drilling system is composed of percussion, rotation, feed, and flushing functions. In this paper, we detail the interaction of feed and rotation functions using a rock model. The feed actuator is a cylinder drive and a hydraulic motor actuator rotates the drill bit. The feed is force controlled and rotation is torque controlled by a feed reduction valve acting on the pressure compensator of the mobile hydraulic proportional directional control valve. In addition, in this work an individual load sensing variable displacement pump is used for both hydraulic functions. A suitable rock model is developed and verified against a measurement set. The inputs of the rock model are percussion drill flow rate, percussion pressure, feed force, and rotation torque, and the outputs are drill bit penetration rate and rotational speed. The modeling work is carried out to enable intelligent rock drilling control system development for changing rock conditions. The simulation results obtained verify that the simple rock model emulates various rock characteristics ranging from extremely hard rock like granite to softer minerals and that the changes in drilling parameters were as expected.

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Li, Bodong, Abdulwahab Aljohar, Guodong David Zhan, Ossama Sehsah, Ali Otaibi, and Zhongwei Suo. "ROP Enhancement in High Mud Weight Applications Using Rotary Percussion Drilling." In Abu Dhabi International Petroleum Exhibition & Conference. Society of Petroleum Engineers, 2020. http://dx.doi.org/10.2118/203201-ms.

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Xuan, Lingchao, Zhichuan Guan, and Huaigang Hu. "Analysis and Improvement of the Rotary Percussion Drilling Tool in Oil Wells." In 2015 International Symposium on Material, Energy and Environment Engineering. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/ism3e-15.2015.122.

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Li, Bodong, Guodong David Zhan, Jianhui Xu, Yulin Tu, and Zhongwei Suo. "Implementation of Selective Laser Melting Technology in Development of Rotary Percussion Drilling Tool." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22136-ea.

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Abstract Metal additive manufacturing, also known as metal 3D printing, offers alternative ways to produce complex components without design constraints compared with traditional subtractive manufacturing methods. As a sub-category of metal additive manufacturing, selective laser melting (SLM) provides many advantages including high as-printed material density, good mechanical properties, and short production cycle, etc. This paper discusses the technical insights on implementation of SLM technology in development of a rotary percussion drilling tool – hydro-efflux hammer. The objective is to improve the quality and reliability of core components of the hydro-efflux hammer through optimized manufacturing workflow with SLM, for enhanced tool performance and extended tool life.

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Xuan, Lingchao, Zhichuan Guan, Huaigang Hu, Jingjiao Li, and Bo Zhang. "The Principle and Application of a Novel Rotary Percussion Drilling Tool Drived by Positive Displacement Motor." In IADC/SPE Asia Pacific Drilling Technology Conference. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/180535-ms.

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Trivedi, A., J. De La Fuente Valadez, S. S. Kandala, A. Mai, R. J. Shor, and A. Vetsak. "Experimental Study for the Validation of Drilling Optimization Model for Improved Performance in Hard Rock Formations." In 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-2178.

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ABSTRACT: Lower Rate of Penetration (ROP) is one of the key challenges while drilling through deeper hard rock formations to access geothermal reservoirs in an advanced geothermal system (AGS). Rotary percussive drilling (RPD) becomes crucial for such systems in increasing ROP. The transferability of hammer drilling operations in deeper and harder rock formations, the mechanisms behind the improved drilling performance, and a nuanced understanding of the drilling dynamics of the method remains to be a critical challenge for a full-scale application of RPD in advanced geothermal systems. This study addresses these challenges through experimental validation of a developed bit performance index (BPI) model. The BPI model was developed using a reward function, the outcome is either rewarded or penalized. The concept of reward function usually exists in optimization and machine learning models. Using the combination of bit geometry, RPM, and hammer frequency, the function predicts optimum drilling dynamic parameters to maximize the ROP under given conditions. A series of experiments, limited to atmospheric pressure and ambient confining stress, were conducted using state-of-the-art hammer drop equipment developed in the laboratory to validate BPI, using dome-shaped diamond percussion inserts on granite rock samples. Efficiency estimates and volume removed by impacting the rock surface at different locations while moving away from the center of the crater were determined through these experiments. The results followed the BPI model – maximum efficiency and volume removal at the edge of the crater as compared with impacts at the center and center-edge. This study provides a novel approach to the characterization of drilling performance using RPD and gives a pathway for improved drilling performance through optimization of drillstring dynamics in deeper, harder rock formations for geothermal well drilling. 1. Introduction Rotary Percussion Drilling (RPD) had been widely used in the industry, before the introduction of rotary rigs in the mid-1930s, for its potential to drill faster in hard formations like granites. In RPD, a down-the-hole hammer is driven by either air or fluid (water) through drill pipes, which also acts as a cleaning mechanism for downhole cuttings.

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Heinz, Heinrich K., Trempess Moore, and Simon Cullum-Kenyon. "Geotechnical Assessments for Trenchless Water Crossings in Alberta." In 2004 International Pipeline Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ipc2004-0608.

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The use of trenchless methods for pipeline water crossings in the Province of Alberta has grown significantly during the past decade, primarily as a result of increasingly strict water protection regulations. Because the feasibility of using a trenchless method is dependent on subsurface conditions, a geotechnical assessment should be performed during the planning stages. The results of this assessment are used in the selection of the most appropriate crossing method, and to assess the risk of encountering difficulties during construction. A discussion of the current state of practice for geotechnical investigations of trenchless projects in Alberta is initially presented. The importance of a good understanding of the engineering geological framework and associated geological-geotechnical complexities is highlighted. Recommended stages of a geotechnical assessment are described, namely the desk study, the site reconnaissance, and the field exploration, which involves drilling and sampling and geophysical surveys where appropriate. It is described how each stage interacts with, and is dependent on the others. It is noted that because the cost of a field drilling and sampling can be expensive when compared to the construction costs, obtaining as much information as possible during the desk study and field reconnaissance stages is considered to be a cost effective strategy. Drilling and sampling techniques currently used in Alberta are briefly reviewed, including continuous flight and hollow stem augering, wet rotary, and cased down-hole air percussion methods. Emphasis is placed on describing the advantages and limitations of each method. Some of the concepts presented are illustrated through evaluation of a recent case study of a recent major river crossing in Central Alberta.

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