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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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A Pressure Control Method for Emulsion Pump Station Based ...
A Pressure Control Method for Emulsion Pump Station Based ...

In this section, an engineering application of ,emulsion pump station, pressure in a coal mine was put forward as a simulation ,example, to verify the feasibility and effectiveness of proposed approach. We chose six ,hydraulic, supports as research objects. When ,hydraulic, supports were running, the pressure of emulsion pump was detected.

Basic Fluid Mechanics and Hydraulic Machines
Basic Fluid Mechanics and Hydraulic Machines

For ,example,, a model can be prepared in a laboratory and tested, and predictions can be made of the prototype for large machines with the help of suitable dimensionless parameters. This is usually done in making models of large ,hydraulic, machines used in power stations or in construction of big dams by making suitable models in the laboratory.

Effective Hydraulic Parameters in Horizontally and ...
Effective Hydraulic Parameters in Horizontally and ...

The effects of ,hydraulic parameter, statistics, surface boundary conditions, domain scales, and fractal dimensions in case of nested soil ,hydraulic, property structure are addressed. Results show that the effective parameters are dictated more by the α heterogeneity for the evaporation scenario and mainly by K s variability for the infiltration scenario.

REAL-TIME DYNAMIC HYDRAULIC MODEL FOR WATER DISTRIBUTION ...
REAL-TIME DYNAMIC HYDRAULIC MODEL FOR WATER DISTRIBUTION ...

(8) is known as the Colebrook ,equation, [16,17] and needs to be solved implicitly: P Uu2D Re (6) Re 64 f' (7) ¸ ¸ ¹ · ¨ ¨ © § Re ' 2.51 3.7 2 log ' 1 f D f. H (8) P is the dynamic viscosity, Pa.s. H is the absolute pipe roughness. 3.2. EPANET . The steady state ,hydraulic, model for the WDN was modelled in EPANET. EPANET is one of the most

Generalized hydraulic geometry: Derivation based on a ...
Generalized hydraulic geometry: Derivation based on a ...

Generalized HG Based on Multiscaling Considering the equivalency of velocity, cross‐sectional area and discharge quantiles postulated by ,equation, (4) we can solve ,equation, (2) for z p and combine ,equation, (2a) with ,equation, (2b) in order to derive scale‐dependent at‐,station, relationships between C A , V and Q similar to the [1953] power laws: where In Figure 15 the values of HG slopes ...

Effective Hydraulic Parameters in Horizontally and ...
Effective Hydraulic Parameters in Horizontally and ...

The effects of ,hydraulic parameter, statistics, surface boundary conditions, domain scales, and fractal dimensions in case of nested soil ,hydraulic, property structure are addressed. Results show that the effective parameters are dictated more by the α heterogeneity for the evaporation scenario and mainly by K s variability for the infiltration scenario.

Effective Hydraulic Parameters in Horizontally and ...
Effective Hydraulic Parameters in Horizontally and ...

The effects of ,hydraulic parameter, statistics, surface boundary conditions, domain scales, and fractal dimensions in case of nested soil ,hydraulic, property structure are addressed. Results show that the effective parameters are dictated more by the heterogeneity for the evaporation

Tips for Smooth Precise Hydraulic Motion Control ...
Tips for Smooth Precise Hydraulic Motion Control ...

An ,example, of this method is to use plots of the motion of the system being tuned to generate a mathematical model of the system. Then, based on the model, the software tool picks a range of ...

Evaluation Of Open Channel Flow Equations
Evaluation Of Open Channel Flow Equations

mean velocity (V) to hydraulic radius (R) and hydraulic gradient (S). In wide open channels, R can be approximated by the mean flow depth (d), which is equal to the flow area (A) divided by the top width (T). In the absence of local hydraulic controls, the hydraulic gradient is usually equal to the channel slope for high in-bank flows.

Modelling Penstock Pressure Pulsations in Hydro-Electric ...
Modelling Penstock Pressure Pulsations in Hydro-Electric ...

hydraulic, grade line in the pipe according to the orifice ,equation,: Q CDAG2gHdrop (1) The impedance method [6] is a frequency domain modelling approach, which focuses on steady-state oscillatory conditions in the frequency domain, therefore skipping the transient development of the pressure oscillations. It is based on the same

Basic Fluid Mechanics and Hydraulic Machines
Basic Fluid Mechanics and Hydraulic Machines

For ,example,, a model can be prepared in a laboratory and tested, and predictions can be made of the prototype for large machines with the help of suitable dimensionless parameters. This is usually done in making models of large ,hydraulic, machines used in power stations or in construction of big dams by making suitable models in the laboratory.

HYDRAULIC CONDUCTIVITY ESTIMATION IN PARTIALLY
HYDRAULIC CONDUCTIVITY ESTIMATION IN PARTIALLY

The organization of the paper is as follows. Section 2 states Richards ,equation, in terms of the pressure head p(k) as a function of saturated ,hydraulic, conductivity k(x) that will be the ,parameter, to be estimated. The analysis of the inverse problem and results on the continuity and di erentiability of p(k) with respect to the ,parameter

Stochastic modelling of the hydraulic performance of an ...
Stochastic modelling of the hydraulic performance of an ...

For ,example,, for a 64-person house (Figure 6 bottom right) the RUE of a 0.1·V Max tank decreased from 99% to 68% as the roof area increased from 75 to 500 m 2 (32% decrease), while the RUE of a 0.3·V Max tank decreased from 99% to 84% (15% decrease) for the same increase in the roof area.

The hydraulic roughness of vegetated channels
The hydraulic roughness of vegetated channels

parameter, that was the product of the velocity V and flow depth D. For application to all shapes of channel D could be replaced with the ,hydraulic, mean depth R. b) Mannings coefficient n varied with a vegetation ,parameter, that was the length of the grass and to a lesser extent the "stand". The latter was

Transient Simulations in Hydropower Stations Based on a ...
Transient Simulations in Hydropower Stations Based on a ...

The analytical method is based on the chain ,equation, of Allievi and the simplifications of the ,hydraulic, turbine as a valve. This method is suitable for simple tube Pelton turbines. On the basis of the analytical method, the graphical method combines the water-hammer wave reflection and superposition with the turbine characteristic curves and guide-vane closing scheme.

Modelling Penstock Pressure Pulsations in Hydro-Electric ...
Modelling Penstock Pressure Pulsations in Hydro-Electric ...

hydraulic, grade line in the pipe according to the orifice ,equation,: Q CDAG2gHdrop (1) The impedance method [6] is a frequency domain modelling approach, which focuses on steady-state oscillatory conditions in the frequency domain, therefore skipping the transient development of the pressure oscillations. It is based on the same

Effective Hydraulic Parameters in Horizontally and ...
Effective Hydraulic Parameters in Horizontally and ...

The effects of ,hydraulic parameter, statistics, surface boundary conditions, domain scales, and fractal dimensions in case of nested soil ,hydraulic, property structure are addressed. Results show that the effective parameters are dictated more by the heterogeneity for the evaporation

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