Results 51 to 60 of about 23,917 (167)

Development and Application of Ball Screw Pumping Unit

Shiyou jixie, 2021
At present, 12,000 rod pumped wells are implementing intermittent pumping system in the Daqing Oilfield, however, due to insufficient downhole feed flow, the use of conventional walking-beam pumping unit seriously affects the economic, efficient, energy ...
Zheng Dongzhi
doaj  

Hydrogeological site characterization of marly-silici-calcareous rocks through surveys of discontinuities and pumping tests

Acque Sotterranee, 2012
One of the challenges in the characterization of fractured aquifers is to define whether the approximation to a porous medium is valid or not. In this context, the present study concerns the hydrogeological characterization of a small area constituted by
Francesca Lotti, Antonella Baiocchi, Salvatore D’Onofrio, Vincenzo Piscopo   +3 more
doaj   +1 more source

Evaluation of suitability for 3D printing of high performance concretes

MATEC Web of Conferences, 2018
The article presents overview of additive manufacturing for concrete structures. Study focuses on specific tests used to determine suitability of high performance mixes for 3D printing.
Kaszyńska Maria, Hoffmann Marcin, Skibicki Szymon, Zieliński Adam, Techman Mateusz, Olczyk Norbert, Wróblewski Tomasz   +6 more
doaj   +1 more source

SODIUM PUMP DEVELOPMENT AND PUMP TEST FACILITY DESIGN [PDF]

, 1963
The study defines a program for the development of large sodium pamps for use with sodium cooled reactor systems of 1000 to 1500 Mw(e) capability, and the functionai requirements of a related sodium pump test facility for testing large pumps. The future pump requirements of large power systems have been estimated, a type of sodium pump recommended for ...
openaire   +2 more sources

Optimization of confined aquifer dewatering for long-deep excavation using simulation–optimization method

Underground Space
The confined aquifer dewatering for long-deep excavations usually encounters challenges due to complicated geotechnical conditions, large excavation sizes, and high hydraulic pressures.
Yanxiao Sun, Zhenxiong Jiang, Liyuan Tong, Jiawei Sun, Jia Cui, Xin Zhou, Songyu Liu   +6 more
doaj   +1 more source

Pump Irrigation: Cost increases in salinas valley

California Agriculture, 1965
salinas valley pumping costs vary widely depending upon their location, with great differences in pumping costs often occurring over relatively short distances.
C Moore, J Snyder
doaj  

Two-phase pump performance program: pump test facility description

, 1976
A description is given of the Two-Phase Pump Performance Project Test Facility, which is located at the Kreisinger Development Laboratory of Combustion Engineering, Inc., in Windsor, Connecticut. The text outlines and describes the physical system which constitutes the facility, as well as the specific pump being tested in the EPRI program ...
M. V. Couture, J. D. Fishburn, J. J. Klebauskas, H. M. Payne, E. Richardson, A. A. Schuetz   +5 more
openaire   +2 more sources

Physical Modeling of Land Subsidence Induced by Triple Pumping on the Confined Aquifer

Applied Sciences
Land subsidence is the geological hazard caused by natural or human factors, resulting in a regional decrease in ground elevation due to the compression of the surface soil of the earth’s crust, which has brought huge losses to the national economy.
Li Yuan, Jian-Jie Jiang, Wen-Hao Guo, Zhen-Dong Cui   +3 more
doaj   +1 more source

Field Pumping and Recharge Test Study for Confined Aquifers in Super-Large Deep Foundation Pit Group Sites

Buildings
To ensure the stability of deep foundation pits in confined aquifers, dewatering is often required. However, pumping from confined aquifers in large deep foundation pit groups may lead to significant environmental deformations.
Shuo Wang, Weidong Wang, Zhonghua Xu, Qingjun Song, Jiangu Qian   +4 more
doaj   +1 more source

PUMP study: reservoir pumping in suspected underdrained shunted patients with normal pressure hydrocephalus - a prospective single-center study. [PDF]

Acta Neurochir (Wien)
Kehler U.
europepmc   +1 more source