Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Drilling speed"'
Autor:
Xinxing Liu
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-23 (2024)
Abstract With the continuous development of underground engineering construction in China, it is particularly important to study the identification of structural plane characteristics of rock masses. In this study, three types of pseudo-rock specimen
Externí odkaz:
https://doaj.org/article/d225d9450e7b485a99a4837513f8896d
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 16, Iss 5, Pp 1732-1748 (2024)
This study purposes an in situ testing method on quality assessment of soil improvement. Factual drilling data includes the spatial distribution and in situ strength of untreated and treated soil along three different drillholes measured by on-site d
Externí odkaz:
https://doaj.org/article/462238a9357d463c912520674a5445b8
Autor:
Tea Romasco, Nilton De Bortoli Jr, Joao Paulo De Bortoli, Sergio Jorge Jayme, Adriano Piattelli, Natalia Di Pietro
Publikováno v:
Heliyon, Vol 10, Iss 15, Pp e35225- (2024)
This study aimed to evaluate various biomechanical parameters associated with the primary stability of Maestro and Due Cone implants placed in low-density artificial bones, prepared using high-speed drilling with irrigation and low-speed drilling wit
Externí odkaz:
https://doaj.org/article/df4a32fd6429480ab18e924df1a39ada
Publikováno v:
Applied Sciences, Vol 14, Iss 21, p 9959 (2024)
The development of automation and intelligence in geological core drilling is not yet mature. The selection and improvement of drilling parameters rely mainly on experience, and adjustments are often made after drilling by evaluating the core, which
Externí odkaz:
https://doaj.org/article/077155b46db5454f963c34970081bb39
Publikováno v:
Shiyou shiyan dizhi, Vol 45, Iss 6, Pp 1170-1177 (2023)
Weirong gas field is the first deep shale gas field in China, with the characteristics of "deep burial depth, thin high-quality reservoirs, high ground stress, high horizontal stress difference, high plasticity and high formation pressure". The engin
Externí odkaz:
https://doaj.org/article/534723165ca44cb2a8c69020bb8148a8
Publikováno v:
Shiyou shiyan dizhi, Vol 45, Iss 6, Pp 1221-1230 (2023)
Deep and normal-pressure shale gas is the key field of shale gas exploration and development of SINOPEC. At present, this type of shale gas is faced with difficulties in the beneficial development. In order to increase the productivity of single well
Externí odkaz:
https://doaj.org/article/9ebdc3189acf4eef9968fd9869fdf7d2
Autor:
Liwei Sun
Publikováno v:
Heliyon, Vol 10, Iss 4, Pp e26342- (2024)
The world is rich in coalbed methane (CBM) resources and has broad exploration and development prospects. In this paper, first, the technical difficulties of drilling and completion in deep shale formations in the Sichuan and Chongqing region is syst
Externí odkaz:
https://doaj.org/article/cfd8560ac78f4481ad5221f4fda66e5c
Publikováno v:
Tehnički Vjesnik, Vol 30, Iss 5, Pp 1620-1626 (2023)
Exploitation of polar resources and scientific research require efficient ice drilling technology. Thermal drilling is a common method for polar ice drilling, and is similar to the principle of ultrasonic assisted drilling; both are drilled by meltin
Externí odkaz:
https://doaj.org/article/526b98747adc4f64b24d7bfb7748e54b
Publikováno v:
Journal of Rock Mechanics and Geotechnical Engineering, Vol 15, Iss 1, Pp 146-168 (2023)
Drilling speed and associated analyses from factual field data of hydraulic rotary drilling have not been fully utilized. The paper provides the reference and comparison for the utilization of drilling information from two adjacent vertical drillhole
Externí odkaz:
https://doaj.org/article/41db9f6eacde47eaaa45f0bb4f8c62ba
Publikováno v:
Case Studies in Thermal Engineering, Vol 47, Iss , Pp 103122- (2023)
Ice cores from polar zones could determine ice dating and biodiversity. Ice cores retrieved in hot-water ice-coring drilling partly melted owing to moderate drilling speed of annular drill head with many nozzles, which was largely depended on the hea
Externí odkaz:
https://doaj.org/article/994a53a796b7408abf82c2699230cf9d