Results 61 to 70 of about 532 (178)
A Fault-Tolerant Integrated Borehole Trajectory Location Method Based on Geomagnetism/IMU of MWD
IEEE Access, 2019 In the oil industry, directional drilling technology plays a significant role in oil-gas exploration. The key to success of directional drilling technology is locate the borehole accurately using measurement while drilling instruments.
Hai Yang +5 more
doaj +1 more source
Downhole measurement: MWD [PDF]
, 1991 Measurement While Drilling (MWD) now becoming an important method of measuring the downhole parameters and transmitting the informations to the surface while drilling in operation at almost real time.
Abdul Razak, Mohd. Razif
core
Advances in Civil Engineering, Volume 2026, Issue 1, 2026.Directional long horizontal drilling hydraulic fracturing technology (DLHDHF) can prevent and control the occurrence of rock burst disasters by controlling the hard roof in the near field. Therefore, it is exceedingly significant to enhance the pressure relief effect by determining the appropriate fracturing scheme. Taking Number 140202 working face of
Shang Du +8 more
wiley +1 more source
Journal of Rock Mechanics and Geotechnical EngineeringStratigraphic interface characterization and strength parameter assessment of geomaterials constitute fundamental research priorities in geological and geotechnical engineering. While measurement while drilling (MWD) and drilling process monitoring (DPM)
Ping-Feng Li +6 more
doaj +1 more source
Island Syndrome in the Critically Endangered Lord Howe Island Cockroach Panesthia lata
Ecology and Evolution, Volume 15, Issue 11, November 2025.The Lord Howe Island cockroach Panesthia lata was found to display significantly reduced intraspecific agonism, and to aggregate more readily with non‐kin, than its mainland sister species Panesthia cribrata. This represents the first evidence that an invertebrate species undergoes similar behavioural shifts as vertebrates following island colonisation.
Susannah K. Coady +6 more
wiley +1 more source
Energy Science &Engineering, Volume 13, Issue 11, Page 5121-5132, November 2025.Schematic diagram of wellbore trajectory of shale gas “wavy” horizontal well. ABSTRACT The thin thickness of shale reservoirs and the presence of faults often require frequent adjustments to the borehole trajectory during drilling, leading to the formation of “wavy” wellbores.
Dewei Gao +3 more
wiley +1 more source
Research on Drilling Bit Positioning Strategy Based on SINS MWD System
IEEE Access, 2019 Accurate measurement of drill bit position and direction is the main technology to realize automation and intelligence in oil drilling field. In recent years, with the rapid development of complex drilling technologies such as high deviation wells ...
Hai Yang +6 more
doaj +1 more source
Research on rotary geosteering drilling technology and equipment in underground coal mine
Meitan kexue jishu, 2022 In view of the limitations of directional drilling technology and equipment for underground gas drainage in coal mining areas, such as low degree of automation, low drilling ratio of target formation, slow drilling rate of rock formation, and small ...
Ke YAO +7 more
doaj +1 more source
Slim-hole Measurement While Drilling (MWD) system for underbalanced drilling [PDF]
, 1995 The objective of this program is to make commercially available, wireless Measurement-while-drilling tools to reliably operate in air, air-mist, air-foam, and other unbalanced drilling environments during oil and gas directional drilling operations in ...
Harrison, W. H. +2 more
core
Energy Science &Engineering, Volume 13, Issue 11, Page 5702-5712, November 2025.Through the independent research and development of nitrogen drilling software, the calculation model of gas injection parameters and friction torque calculation model suitable for coalbed methane nitrogen drilling are established, and the calculation methods of construction parameters such as gas injection volume and injection pressure, friction ...
Hu Jiachen +6 more
wiley +1 more source