Results 41 to 50 of about 213 (157)

Drilling Within the Critical Zone

Hydrological Processes, Volume 40, Issue 3, March 2026.
This review synthesises 30 years of critical zone drilling methodologies for studying subsurface weathering, water storage, and biogeochemical processes. We evaluate drilling techniques, sampling strategies, downhole logging, and long‐term monitoring approaches while addressing contamination control and core preservation challenges.
Amanda Donaldson, Russell P. Callahan, W. Jesse Hahm, David N. Dralle, Anders Noren, Rachel E. Breunig, Berit M. Hudson Rasmussen, Laura V. Krone, Susan L. Brantley, A. Joshua West, Lin Ma, Clifford S. Riebe, Margaret Zimmer, Ashlee Dere, Daniella Rempe   +14 more
wiley   +1 more source

Quantifying Gas and Thermal Energy Emissions in an Active Geothermal Area: Insights From Le Biancane (Larderello Field, Italy)

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract The Larderello‐Travale area in the northern Apennines of Italy hosts the world's oldest exploited geothermal field. Its success lies primarily in the presence of an extraordinary geothermal resource housed in a large vapor‐dominated fractured reservoir that produces superheated steam.
D. Granieri, M. Cerminara, F. Mazzarini, R. Novellino, M. Trolese, E. Dallara, M. Lelli   +6 more
wiley   +1 more source

Key Technology for Drilling Speed Improvement of High Abrasive Formation in Aktobe

Shiyou jixie, 2018
The Zahnanor and North Tluwa oil field in the Aktobe area are rich in oil and gas resources. The main oil and gas reservoirs are located in the Carboniferous strata below the Permian.
Wang Gang, Li Wanjun, Liu Xin, Ye Dongqing, Tian Dishou, Wang Yanfeng, Fan Honghai   +6 more
doaj  

REDUCTION OF COST AND TIME CONSUMPTION IN WELL-CONSTRUCTION

Rudarsko-geološko-naftni Zbornik, 1998
A Contractor usually utilizes the available drilling equipment when constructing just one single well. Drilling cost and time consumption in constructing the well MB-1, using the percussion method, and the well MB-2, using the conventional rotary ...
Mladen Zelenika , Božo Soldo
doaj  

Evaluation of the Efficiency of Impact Mechanisms on the Example of Hydraulic Rotary Hammer Drills

Management Systems in Production Engineering
The efficiency of energy transfer in impact mechanisms, often referred to as impact engines, is of key importance for users of these devices, including hydraulic rotary hammer drills.
Krauze Krzysztof
doaj   +1 more source

Exploration and determination of the principles of rotary-percussive underground slimhole drilling

International Journal of Mining Science and Technology, 2014
Abstract A possibility of the efficient use of rotary percussive drilling to provide drilling smaller diameter holes (40–70 mm) both in mining and prospecting is disclosed herein. A new construction designed for the nipple thread connection is described.
Anastasija Shadrina, Lev Saruev
openaire   +1 more source

STRUCTURAL DESIGN AND MOTION SIMULATION RESEARCH ON A NEW TYPE COMPOSITE ROTARY PERCUSSION DRILLING TOOL

Jixie qiangdu, 2017
A new type composite rotary percussion drilling tool was designed by studying the conversion mechanism of rotary to reciprocating motion. High-frequency axial impact and vibration was generated by an impact and energy transfer mechanism consisting of a ...
ZHANG HaiPing, LIU XiaoDan, WANG JiaChang, SUN MingGuang   +3 more
doaj  

Acceleration Mechanism and Efficiency of High-Speed Rotary Percussion Drilling and Grinding of Cement Plug

Shiyou jixie
At the time of rotary percussion drilling and grinding of cement plug at high speed,the combination of high-speed rotary cutting and high-frequency axial percussion can significantly improve the efficiency of drilling and grinding cement plug,but the ...
Liu Wang, Guo Zhaohui, Jiang Zixuan, Guan Feng, Tian Haifeng, Li Zirui, Xia Yusheng   +6 more
doaj  

Weak zone characterization using full drilling analysis of rotary-percussive instrumented drilling

International Journal of Rock Mechanics and Mining Sciences, 2016
• We detect three kinds of weak zones of rock mass in the rotary-percussive instrumented drilling process.
Yue, QZQ, Chen, J
openaire   +3 more sources

Application, advantages and limitations of high-density gravimetric surveys compared with three-dimensional geological modelling in dolomite stability investigations

Journal of the South African Institution of Civil Engineers, 2011
The article discusses the nature of the gravimetric survey as applied and used in dolomite stability investigations on areas underlain by the Chuniespoort Group in South Africa.
I J Breytenbach, P J A Bosch
doaj