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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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mud bucket for drill pipe
Single Acting Pulse Width Control PLC Synchronous ...
Single Acting Pulse Width Control PLC Synchronous ...

Functions, and Features: 1: Hydraulic pump ,station,: Main equipment, releasing control command and collecting information, providing hydraulic oil for system according to synchronous instruction and using PWM signal to control high frequency solenoid valve to execute system instructions. 2: …

Determination of effective parameters for modeling water ...
Determination of effective parameters for modeling water ...

The soil ,hydraulic functions, were taken according to the van Genuchten/Mualem model and imply five parameters: saturated water content θs, residual water content θr, pore-size ,parameter, α, pore-width ,parameter, n, and saturated water conductivity Ks. In the inverse ,parameter, estimation, the

Multiobjective parameter estimation of hydraulic ...
Multiobjective parameter estimation of hydraulic ...

Moreover, the addition of soil water pressure head data resulted in unique ,parameter, values for the optimized soil ,hydraulic functions, under our experimental conditions. -from Authors View Show ...

On the Effective Averaging Schemes of Hydraulic Properties ...
On the Effective Averaging Schemes of Hydraulic Properties ...

We use two types of parameter distributions for represent-ing spatial variability of hydraulic parameters. The first is the widely used lognormal distribution and the second is a syn-thetic trapezoidal type distribution which is described below. Lognormal-Type Distribution (L-Type) The hydraulic parameters are assumed and fitted to be

Single Acting Pulse Width Control PLC Synchronous ...
Single Acting Pulse Width Control PLC Synchronous ...

Functions and Features: 1: Hydraulic pump station: Main equipment, releasing control command and collecting information, providing hydraulic oil for system according to synchronous instruction and using PWM signal to control high frequency solenoid valve to execute system instructions. 2: …

Combined Punching and Shearing Machine and Angle Hydraulic ...
Combined Punching and Shearing Machine and Angle Hydraulic ...

13/6/2019, · The Combined Punching and Shearing Machine is a machine tool that combines various ,functions, such as metal cutting, punching, shearing ... The Combined Punching and Shearing Machine are divided into two ,types,: Hydraulic Ironworker and Mechanical Ironworker ... The specific cutting size is required to refer to the ,parameter, table. Channel ...

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.

(PDF) Hydraulic geometry of stream reaches | Michael ...
(PDF) Hydraulic geometry of stream reaches | Michael ...

The reach mean and coefficient of variation of each cross-sectional hydraulic parameter such as surface width are denoted as W and W CV , respectively. Power functions are used because they are ubiquitous to previous studies of at-a-station hydraulic geometry.

Determining the Hydraulic Geometry Parameters of Seyhan ...
Determining the Hydraulic Geometry Parameters of Seyhan ...

The hydraulic geometry parameters of rivers including the width, depth and velocity are related to its discharge as simple power functions at a given cross-section. The characteristics of a river can be determined by using the hydraulic geometry parameters.

Soil hydraulic properties in one-dimensional layered soil ...
Soil hydraulic properties in one-dimensional layered soil ...

[2] Soil ,hydraulic, parameters are significant components for many hydrological, meteorological, and general circula-tion models [Hansen et al., 1999; Mohanty et al., 2002; Mohanty and Zhu, 2007]. They are used to define the soil ,hydraulic, properties in the vadose zone, characterizing the effective ,hydraulic, behavior of the soil system [Wood,

DEVELOPMENT OF A SOIL HYDRAULIC PARAMETER ESTIMATOR
DEVELOPMENT OF A SOIL HYDRAULIC PARAMETER ESTIMATOR

hydraulic parameter, information or typical values. Therefore, more accurate and detailed soil ,hydraulic parameter, data is vital if regional or global soil moisture predictions are to be made with the required accuracy. To overcome this limitation, it is hypothesised by this thesis that the soil

Combined Punching and Shearing Machine and Angle Hydraulic ...
Combined Punching and Shearing Machine and Angle Hydraulic ...

The ,Combined Punching and Shearing Machine, is a machine tool that combines various ,functions, such as metal cutting, punching, shearing, bending, etc. It has the advantages of simple operation, low energy consumption ,and low maintenance cost. The ,Combined Punching and Shearing Machine, are divided into two ,types,: ,Hydraulic, Ironworker and Mechanical ...

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.

Determining the Hydraulic Geometry Parameters of Seyhan ...
Determining the Hydraulic Geometry Parameters of Seyhan ...

The ,hydraulic, geometry parameters of rivers including the width, depth and velocity are related to its discharge as simple power ,functions, at a given cross-section. The characteristics of a river can be determined by using the ,hydraulic, geometry parameters.

DEVELOPMENT OF A SOIL HYDRAULIC PARAMETER ESTIMATOR
DEVELOPMENT OF A SOIL HYDRAULIC PARAMETER ESTIMATOR

hydraulic parameter, information or typical values. Therefore, more accurate and detailed soil ,hydraulic parameter, data is vital if regional or global soil moisture predictions are to be made with the required accuracy. To overcome this limitation, it is hypothesised by this thesis that the soil

LOCAL AND CATCHMENT SCALE VALIDATION OF SOIL HYDRAULIC ...
LOCAL AND CATCHMENT SCALE VALIDATION OF SOIL HYDRAULIC ...

functions (PTFs). A PTF is an empirical relationship between easily obtainable soil characteristics and a soil hydraulic parameter. PTFs have been developed for a range of parameters. For this thesis, PTFs for the saturated hydraulic conductivity (K s) and the available water content (AWC) are researched.

On the Effective Averaging Schemes of Hydraulic Properties ...
On the Effective Averaging Schemes of Hydraulic Properties ...

We use two ,types, of ,parameter, distributions for represent-ing spatial variability of ,hydraulic, parameters. The first is the widely used lognormal distribution and the second is a syn-thetic trapezoidal type distribution which is described below. Lognormal-Type Distribution (L-Type) The ,hydraulic, parameters are assumed and fitted to be

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