Deep-well Pumps Research Articles

Increasing the efficiency of manufacture of deep-well pump bushings on use of an instrument of a composite

Increasing the efficiency of manufacture of deep-well pump bushings on use of an instrument of a composite

Conceptual Remarks on The Solutions of Prospective Problems for The Development of El-Wadi El-Gideed Wells Field.(Dept.C)

Egypt as an arid zone has utilized irrigation from the earliest times to grow various crops and continually establish the roots of civilization allover the country. Irrigated agricultural development and reclamation of new land have highest priority in the present world where production of foodstuffs must keep pace with a very rapidly increasing population rate. Since great attention was directed toward El-Wadi El-Gideed area, extensive research and field works were carried out in the attempt to reclaim vast areas there and converted from plain gel low desert to productive green lands. This is for a sound ground water basin development leading to well developed agricultural zone with truly economic water development controled by systematic management, avoiding any striking discrepance between the major anticipated objectives of the project. Most of the prospective problems and expected difficulties are fully identified and proposed solutions are domonstrated. Conceptual remarks were focused on: oonstructional precautions and selection of deep-well turbine pumps, hydrologic equilibrium, . excessive well 1088es, safe yield and overdraft, excessive discharge (over-pumping) from an aquifer and specific capacity of a well, the drawdown and recovery curves, the rate of recovery in pressure wells, style=text-decoration: underline; confined aquifer and multile interfering well systems, corrosivity of pumped water and precautions against pipes corrsion and finally the deterioration of ground water quality. Several local examples accomodating with the environmental circumstances of the area under investigation were displayed and proposed analyses and procedures for satisfactory solutions were discussed and fully represented. The research paper le concluded by itemizing few of the anticipated gains as well as the prospective side effects of the over-pumping activities under extensive rates. Pew concluding remarks and recommendations are also provided; hoping to be, along with the context material presented, to be useful to all those engaged generally in irrigation and water development and those who are doing their extreme efforts to achieve anticipated progress in El-Wadi El-Gideed, Egypt.

Calculation of the torque needed for screwing deep-well pump rod joints

Calculation of the torque needed for screwing deep-well pump rod joints

Protective properties of electroplated coatings on liners for deep-well pumps

Protective properties of electroplated coatings on liners for deep-well pumps

Quality of deep-well sucker-rod pumps

Quality of deep-well sucker-rod pumps

Deep-well pump rods hardened by elastic deformation

Deep-well pump rods hardened by elastic deformation

The calculation of unilateral magnetic attraction forces in electric drive motors for submersible deep-well pumps

The calculation of unilateral magnetic attraction forces in electric drive motors for submersible deep-well pumps

How to determine loads acting on the valve assembly of a reciprocating deep-well pump

How to determine loads acting on the valve assembly of a reciprocating deep-well pump

Stand for plastic extension and torsion of deep-well pump rods

Stand for plastic extension and torsion of deep-well pump rods

Determination of limiting down-hole depth of liner type deep-well sucker-rod pump and length of liner

Determination of limiting down-hole depth of liner type deep-well sucker-rod pump and length of liner

The use of stages with radial vane discharge in centrifugal deep-well pumps

The use of stages with radial vane discharge in centrifugal deep-well pumps

Development of Automation on Salt River Project

Workload studies and efficiency evaluation of water deliveries plus savings of pump costs justify the installation of automatic supervisory control for irrigation facilities and deepwell pumps. Due to the fact that the Salt River Project irrigation system is the oldest multipurpose irrigation project in the United States and is now in the transition of converting many of the farm lands into urban development, new problems have been created, making this type of installation feasible. The hydraulic design of the gates and changes in operation of the delivery system have been thoroughly studied and integrated into the application of the remote supervisory control.

Hydrogeologic aspects of dewatering at Welland

Realignment of the Welland Canal between Port Robinson and Port Colborne and the building of underpass structures necessitated both temporary and permanent depressurizing of an artesian aquifer. The aquifer is a thin zone of fractured dolomite found immediately beneath approximately 60 to 100 ft (18 to 30 m) of poorly-permeable glacial till and lacustrine sediments. Since most of the private wells in the Welland area obtain water from the bedrock aquifer, extensive well interference problems were anticipated. Problems in connection with the dewatering and depressurizing included design of deep-well pumping systems for excavation work, prediction and monitoring of drawdown effects, and the determination of responsibility for interference in specific areas since several dewatering systems with overlapping cones-of-depression would be operating simultaneously. To overcome a problem of insufficient hydrologic data prior to the commencement of dewatering, a contour map of the original piezometric surface was constructed from drillers' records. This map showed a normal groundwater flow system where the movement of groundwater was from local upland recharge areas to local discharge areas along the Welland River and the existing canal. A contour map of the drawdown was drawn on the assumption that deviations from the reconstructed original piezometric surface were caused by dewatering. Analysis of the cone-of-depression along with analyses of pre-engineering pumping tests provided values for aquifer coefficients required for solution of the unsteady flow equations. Because the coefficients used were average values for a relatively small area extrapolated over a broad area, the predicted drawdown showed considerable variation in reliability. The work did provide, however, a check on the numerical method (Frind 1970) which takes into account local variations.

Some aspects of the fabrication of nitrided bushings for deep-well pumps

Some aspects of the fabrication of nitrided bushings for deep-well pumps

Design and Operating Features of the SEDCO 135-F Floating Drilling Vessel

Abstract This paper describes the design of one of the largest semi-submersible drilling vessels ever constructed. The arrangement and operating features of the drilling machinery and auxiliary underwater drilling equipment are also reviewed. The SEDCO 135-F is presently under construction at Victoria Machinery Depot in Victoria, B.C. Sister vessels have been completed and are in operation in the Gulf of Mexico, off Borneo, in the North Sea and off Nigeria. The physical layout of the vessel is presented in terms of its unusual shape, size and arrangement of equipment and accommodations. The diesel-electric power plant provides D.C. power for the heavy machinery and A.C. power for miscellaneous ship service. Electrically driven deep-well pumps are used to deballast the vessel and to move water and fuel from the lower compartments to the operating deck level. Other mechanical features include three large cranes, pneumatic storage tanks and other special equipment required to handle the underwater drilling equipment. Due to the severe oceanographic conditions off the west coast of Canada, a special mooring system was designed to secure the rig under adverse conditions. The design criteria, hardware and operation of this system are reviewed. The vessel will be equipped with specialized underwater equipment to enable it to drill exploratory wells in water depths of up to 800 feet. The hydraulically operated well control equipment is situated on the ocean floor during normal operations. This "diverless" equipment is described, along with its handling and operating procedures.

A View of Pakistan's Industrial Development

Capital goods industries will receive major emphasis in Pakistan's industrial sector under that country's Third Five-Year Plan (196570). Increased industrial output has been a major objective of the Government of Pakistan in its plans for economic development. In this essay, we will direct our attention toward (1) achievements in industrial production since partition; (2) government policies which guide industrialization; and (3) questions to which policy makers and planners should give especial consideration. A chievements In 1947, Pakistan possessed considerable resources in raw materials, such as cotton, jute, bamboo, hides, and oilseeds, but had little domestic capacity for processing them. The country's industrial firms consisted of several cotton textile mills, a large shoe factory, an electric steel-smelting furnace, a few cement and sugar factories, and the railway workshops which have manufacturing facilities. Among the small-scale producing units were less than 900 small factories which processed raw materials for export, less than 400 small mills for converting food crops, and a few light engineering works. By the end of 1963 the country had reached self-sufficiency in the following items: aluminum and brass utensils, biscuits, cigarettes, razor blades, bicycle tires and tubes, small diesel engines, and some types of electric wire and cable. Sporting goods, cutlery, and surgical instruments are among the nation's exports. An oil refinery has begun production, and two others have been authorized. Two steel mills have been sanctioned by the government which, if they materialize, should meet 70% of the country's requirements. In the chemical-fertilizer industries, manufactured products include soda ash, caustic soda, superphosphate, and viscose rayon; the chemical industry is now moving into petrochemicals and other synthetic fibers. The foundry and rolling mill of Pakistan's largest engineering works turn out semi-automatic looms, lathes, presses, slow-speed diesel pumps, deep-well pumps, and electric transformers and batteries, paints and varnishes, and soap. Opel and Ford Consul automobiles are assembled, and the assembly of Mack trucks has been sanctioned.' While the country's industrial base has broadened, the contribution of the industrial sector to the Gross National Product (GNP) rose from 7.5% in 1950-51 to approximately 13% in 1963-64.

Maintenance of Rock Wells

THE city of Lansing, Mich, and the metropolitan area adjoining obtain their water supply principally from rock wells drilled into the waterbearing sandstones of the Pennsylvanian formation which is common to the area. The sandrock is encountered at depths of 50 to 150 ft and extends to a depth of 400 to 450 ft below the ground level. At greater depths, limestone and highly mineralized water (especially that high in chlorides) may be encountered. The city operates some 100 wells with a total capacity of approximately 30 mgd. Average daily production is approximately 18 mgd. Sixty-four of the wells are equipped with deep-well turbine pumps and 36 are pumped by air. The deep-well turbine pumps are set at 200 to 220 ft and the diameter of the wells ranges from 6 to 14 in. Drilled over a period of 47 years (1909 to 1956), the Lansing wells are generally located along water transmission mains which supply the water conditioning plant with untreated water. The transmission mains extend from the southeast to the northwest sections of the city. The wells are spaced at distances of 300 to 1,500 ft, with 1,000 ft the optimum spacing. Some idea of the problem of maintaining the yield and life of the wells can be seen from the fact that fifteen new wells drilled in 1935 had an initial

Purchase and Maintenance of Deep-Well Pumps

Purchase and Maintenance of Deep-Well Pumps

Prediction of Centrifugal-Pump Performance

Abstract The author states that the selection of impeller, diffuser, and volute shapes of centrifugal pump designs are largely empirical, because the theory, based mostly upon the classical centrifugal theory, has been incorrect or at least incomplete. In the prediction of performance of small multistage deep-well pumps, some time ago, the author found another course of analysis which gave promise of excellent results. Essentially, the centrifugal pump does not operate as such except at shutoff but does behave as a radial-flow turbine. Consequently, the performance can be more truly analyzed and the hydraulic losses can be treated as if the pump were a pipe with a shock loss at the pickup edge of the blades and a recirculation loss. This method of prediction is explained and illustrated in the course of the paper.

Closure to “Discussion of ‘Problems in Modern Deep-Well Pumping’” (1939, Trans. ASME, 61, p. 272)

Closure to “Discussion of ‘Problems in Modern Deep-Well Pumping’” (1939, Trans. ASME, 61, p. 272)