The production procere and system well tesing data of Donghe-1 well are analysed comprehen sively,and then the relations between the oil production with oil pressure and choke diameter,between the kinetic head loss with oil rate are estublished in this paper.
The mathematical method of head loss for pulp flow in pipeis modelled by employing elastoplastic mechanics theory. This mathematical model may offer atheoretical basis for the design of pipe transpcrt system in pulp and paper mill.
Because only the friction losses for slopes not greater than 2% and hydrostatic head losses due to a profile change have been taken into account, wastewater can be lifted to a height of 4.5～6m or carried to a distance of 4km depending on the operating level of the system.
Scanning the filtering material and gathering the velocity can help to calculate homogeneity coefficient, approximately representing the pressure loss of every spot, thus the homogeneity or inhomogeneity can be determined.
The design criterion for the string and the method for designing combined equicohesive string under the condition of two-directied stress are put forward: to reduce the friction resistance on the string and the loss of fluid pressure head, small-sized Grade D sucker rod should be adopted as possible, and the rod with larger size can be selected when the maximum working stress on the small-sized rod string is higher than the allowable stress.
An estimate is given of the influence of the waves on the magnitude of the head loss by the friction of the gas-liquid mixture in a horizontal tube.
Calculation of friction head loss in plug flow of gas-liquid mixture in tubes
Influence of Polyacrylamide Additions on the Head Loss in Abrupt Contractions and Expansions of Pipes
An increase and a decrease in the head loss have been revealed.
Therefore, the equivalent head loss coefficientCl is introduced and experimentally determined as 0.3 which is several times larger than the Darcy-Weisbach friction coefficientf for the present experimental setup.
We present a new design of a heat exchanger capable of handling flows of gases and liquids at temperatures from -270 to +1100°C and pressure of up to 30 MPa, for any throughput capacity required, and ensuring low loss of head of heat-transfer media.
It is usually advisable to increase the size of both suction and discharge pipes at the pump connections to decrease the loss of head from friction.
In addition, water moving through the interstices of the sandstone must overcome frictional resistance resulting in a further loss of head.