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Drilling Theory Research and Its Engineering Applications

A special issue of Applied Sciences (ISSN 2076-3417).

Deadline for manuscript submissions: closed (20 January 2025) | Viewed by 4608

Special Issue Editors


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Guest Editor
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
Interests: dynamics of drilling engineering
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Guest Editor
College of Petroleum Engineering, China University of Petroleum, Beijing 100083, China
Interests: down-hole tubular mechanics and its applications; directional drilling theory and technology

Special Issue Information

Dear Colleagues,

Drilling, a fundamental technique in the realms of engineering and geology, serves as a crucial tool for exploring the mysteries of the Earth’s subsurface. As our understanding of the Earth’s composition and structure continues to evolve, so does the need for sophisticated drilling methods that can unearth valuable insights and contribute to a mirage of applications. Drilling is a process whereby a hole is bored using a drill bit to create a well for oil and natural gas production. The term drilling also indicates the whole complexity of operations necessary to construct a well of circular sectors applying excavation techniques. Drilling methods and techniques are employed to extract valuable resources, access geological formation, and advance scientific understanding. The versatility of drilling methods lies in their ability to adapt to different terrains and purposes, making them an indispensable tool in various industries.

This Special Issue aims to discuss the latest progress in drilling theory and its engineering applications, basic frontier theories, and the latest technologies. The scope of manuscripts includes, but is not limited to, the following:

  • All aspects of the drilling process and its engineering design;
  • The design, execution, and post analysis of all drilling programs;
  • The identification of potential drilling problems and possible solutions;
  • Modelling of drilling problems;
  • Innovative drilling techniques.

Dr. Qilong Xue
Prof. Dr. Wenjun Huang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • dynamics of drilling engineering
  • drilling theory
  • engineering applications
  • latest technologies

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Published Papers (1 paper)

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Research

17 pages, 3343 KiB  
Article
Anti-Vibration Method for the Near-Bit Measurement While Drilling of Pneumatic Down-the-Hole Hammer Drilling
by Lu Wang, Wenchao Gou, Jun Wang and Zheng Zhou
Appl. Sci. 2024, 14(18), 8565; https://doi.org/10.3390/app14188565 - 23 Sep 2024
Viewed by 3769
Abstract
Pneumatic down-the-hole (DTH) hammer drilling technology has been used extensively in the fields of heat reservoir exploitation and geological exploration owing to its advantages of high efficiency and low pollution. However, the vibration near the bit is up to 40 g while DTH [...] Read more.
Pneumatic down-the-hole (DTH) hammer drilling technology has been used extensively in the fields of heat reservoir exploitation and geological exploration owing to its advantages of high efficiency and low pollution. However, the vibration near the bit is up to 40 g while DTH hammer drilling, which significantly affects the performance and longevity of the near-bit measurement while drilling (MWD). To enhance the environmental adaptability of the near-bit MWD in pneumatic DTH operations, a design method for a vibration-damping system based on the parameter optimization of a non-dominated sorting genetic algorithm II (NSGA-II) is proposed in this study. First, the whole structure of the near-bit MWD is designed, including the MWD sub-shell, sensors, measurement circuits, batteries, and connecting structures (the circuit unit). Secondly, this study analyzes the vibration characteristics of the pneumatic DTH hammer near the bit. According to the damping structure, the vibration response model for the circuit unit and the damping model are established. Thirdly, NSGA-II is employed to optimize the parameters of the damping model in terms of the low-frequency, high-intensity vibration characteristics near the bit in pneumatic DTH operations, thereby devising a damping scheme tailored to the unique conditions of DTH hammer drilling. Finally, vibration experiments were conducted to verify the effectiveness of the vibration-damping device. The experimental results indicate that within the vibration frequency range of 5–20 Hz and vibration level of 10–40 g, the peak attenuation rate of the circuit unit is more than 86.446%, and the improvement rate of the vibration stability of the system is more than 75.214%; the anti-vibration performance of the near-bit MWD system in DTH hammer drilling is improved remarkably. This study provides strong technical support for the stability of MWD equipment under such special working conditions. It has broad engineering application prospects. Full article
(This article belongs to the Special Issue Drilling Theory Research and Its Engineering Applications)
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