There are two types in common use—(1) the positive displacement piston pump, driven by a hydraulic reciprocating subsurface engine directly connected to the pump, and (2) the jet pump. Wellheads for hydraulic pumps can be simple and compact with a low profile. They can be closely spaced ...
and the use of the hydraulic drive allows the rotary to move up and down the mast rather than restrained to a location fixed by the drive system. The movable
This chapter provides an overview of hydraulic-powered downhole pumps, which are powered by a stream of high pressure power fluid supplied by a power fluid (PF) pump at the surface and sent to a downhole pump or pump engine. Hydraulic pumps are basically of two types—piston downhole pumps ...
The boat has no fewer than five hydraulic pumps.这艘船配有不少于5个液压泵。 A group of apprentics were operating the hydraulic press.一群学徒正在开动水压机。 43 sufficiently adv.足够地,充分地 参考例句: It turned out he had not insured the house sufficiently.原来他没有给房屋投足保险。 Th...
This section will refine the model grid in the areas of interest such as around the supply wells and around the refueling area.The reason for refining the grid is to get more detailed simulation results in area of interest or in zones where you anticipate steep hydraulic gradients.If drawdown...
参考例句: The boat has no fewer than five hydraulic pumps.这艘船配有不少于5个液压泵。 A group of apprentics were operating the hydraulic press.一群学徒正在开动水压机。27 dynamite n./vt.(用)炸药(爆破) 参考例句: The workmen detonated the dynamite.工人们把炸药引爆了。 The philosopher was ...
A flood control project which will be operated and maintained by a public agency to reduce flood damages to existing buildings and structures, including a hydrologic and hydraulic study of the existing and proposed conditions of the watershed, Nothing in this definition shall preclude the...
This chapter discusses the problems in a hydraulic system. Many of the failures in a hydraulic system show similar symptoms—a gradual or sudden loss of high pressure, resulting in a loss of power or speed in the cylinders. Any major component, such as pump, relief valve, directional valve,...
10、mberVDeReDe : equivalent diameter当量直径20hydraulic radius水力半径: rHpHLSr where S = cross section area of channel流通截面 Lp = perimeter of channel in contact with liquid 润湿周边equivalent diameter当量直径: DepHeLSrD4421 For circular pipe 44/2DDDrHDrDHe 4For layer flow with free surface...
9.2.3Designofhydraulicsystems1.Selectionofhydrauliccircuits2.Designofhydraulicsystems3.SelectionofthehydraulicvalvesFig.9-6PrinciplechartofhydraulicsystemFig.9-7Principlechatrofhydraulicsystemwithmodularvalves9.2.4Selectionofhydrauliccomponents1.Pumps1〕pressure2〕flowrateThemaximumflowrateprovidedbythetwopumpsis25.13...