Results 81 to 90 of about 532 (178)

Design and Algorithm Verification of a Gyroscope-Based Inertial Navigation System for Small-Diameter Spaces in Multilateral Horizontal Drilling Applications

Micromachines, 2015
In the recent years horizontal drilling (HD) has become increasingly important in oil and gas exploration because it can increase the production per well and can effectively rework old and marginal vertical wells.
Tao Li, Gannan Yuan, Haiyu Lan, Martin Mintchev   +3 more
doaj   +1 more source

Assessment of soil fertility and nutrient distribution for enhanced soil health and field management through an innovative approach

Agrosystems, Geosciences &Environment, Volume 8, Issue 2, June 2025.
Abstract The principal agricultural region of alfalfa, maize, and rapeseed was examined for soil nutrients. Primary statistics for a parameter were maximum, minimum, mean, standard deviation, coefficient of variation, skewness, and kurtosis. Some parameters had non‐normal distributions and were statistically significant.
Amir Bostani, Amin Mohebbi Tafreshi, Mohammad Hosein Bijeh Keshavarzi   +2 more
wiley   +1 more source

Arteriolar degeneration and stiffness in cerebral amyloid angiopathy are linked to Aβ deposition and lysyl oxidase

Alzheimer's &Dementia, Volume 21, Issue 6, June 2025.
Abstract INTRODUCTION The morphological and molecular changes associated with the degeneration of arterioles in cerebral amyloid angiopathy (CAA) are incompletely understood. METHODS Post mortem brains from 26 patients with CAA or neurological controls were analyzed using light‐sheet microscopy, and morphological features of microvascular degeneration ...
Lissa Ventura‐Antunes, Alex Nackenoff, Wilber Romero‐Fernandez, Yongchao Wang, Allison M. Bosworth, Alex Prusky, Emmeline Wang, Cristian Carvajal‐Tapia, Alena Shostak, Hannah Harmsen, Bret Mobley, Jose Maldonado, Neely Womble, Elena Solopova, J. Caleb Snider, W. David Merryman, Ethan S. Lippmann, Matthew Schrag   +17 more
wiley   +1 more source

Observations of Sea‐Swell Wave Reflection From a Steep, Nearshore Bar

Earth and Space Science, Volume 12, Issue 4, April 2025.
Abstract Wave reflection near the beach affects the energy reaching the shore, surfzone wave conditions, and sediment transport. Many prior studies have shown strong reflection of infragravity (0.01 < frequency < 0.05 Hz) wave energy from steep foreshore slopes.
Drude F. Christensen, Britt Raubenheimer, Steve Elgar   +2 more
wiley   +1 more source

DATA ACQUISITION IN RUNNING TRIPLE COMBO, A COMBINATION OF MEASUREMENT WHILE DRILLING (MWD) AND LOGGING WHILE DRILLING (LWD) WITH NUCLEAR LOGGING TOOL, ASSESSED BY SAFETY ASPECTS

, 2015
Drilling and exploration in oil and gas jobs require accurate yet fast data on formation being drilled. This type of activity utilizes services providing real time logs with triple combo combining MWD (Measurement While Drilling) and LWD (Logging While ...
Setianingsih, Lilis Susanti
core   +1 more source

Plio‐Pleistocene decline of mesic forest underpins diversification in a clade of Australian Panesthia cockroaches

Systematic Entomology, Volume 50, Issue 2, Page 253-268, April 2025.
The diversification of the Australian second‐wave Panesthia is strongly tied to the fragmentation of mesic forest from the Pliocene onwards. The Lord Howe Island cockroach Panesthia lata reached the island in a single colonization event and subsequently expanded its niche.
Maxim W. D. Adams, James A. Walker, Harley A. Rose, Braxton R. Jones, Andreas Zwick, Huiming Yang, James Nicholls, Diana Hartley, Stephen Bent, Nicholas Carlile, Ian Hutton, Simon Y. W. Ho, Nathan Lo   +12 more
wiley   +1 more source

Research on Magnetorheological Fluid Negative Pulse Generator Used for Inclinometry While Drilling in Vertical Wells

Shiyou jixie, 2023
Measurement while drilling(MWD)is the best means to grasp downhole real-time drilling information and then conduct optimization control,and has been widely used in oil and gas well drilling.The mud pressure pulse transmission is the main method for MWD ...
Yi Ming, Zhang Lei, Li Fuqiang, Li Ming, Yun Tao, Liu Chenxi, Tang Liping   +6 more
doaj  

Key Technologies for Horizontal Well Development in Deep Tight Sandstone Reservoirs

Energy Science &Engineering, Volume 13, Issue 3, Page 1323-1336, March 2025.
A geological evaluation framework based on well log data clarifies the reservoir's porosity and permeability, establishes a numerical model, and details methods for stratigraphic division, well pattern selection, and well density determination. It also optimizes design parameters for segmented hydraulic fracturing in horizontal wells.
Yiting Guan, Xin Cheng, Xiaoyang Chen
wiley   +1 more source

Gyroscopes for measurement while drilling [PDF]

, 2018
Ввиду сложных условий эксплуатации скважинных приборов до настоящего времени наибольшее применение получили магнитометрические забойные телеметрические системы (ЗТС). Они имеют невысокую стоимость и высокую надежность. Однако, направление и напряженность
Брантов, А. А.
core  

Blast design using measurement while drilling parameters

, 2002
Measurement while drilling (MWD) techniques can provide a useful tool to aid drill and blast engineers in open cut mining. By avoiding time consuming tasks such as scan-lines and rock sample collection for laboratory tests, MWD techniques can not only ...
Segui, J. L. B., Higgins, M. R. T.
core   +1 more source