Motors transfer fluid power into mechanical power translational or rotary. Rforce is a new type of motors to be used at maximum drilling parameters in all well types. The turbodrill, first patented in 1873, provided a means of driving the bit by harnessing the power of the drilling fluid, but the complexity of the tool and the lack of. The piston displacement element forms a space with variable volume together with cylinder and cylinder cover. Positive displacement pump drive package worldwide electrics positive displacement pump drive package is built for the demanding startup, control and protection needed for salt water disposal and jet pump applications. Best rock songs vietnam war music best rock music of all time 60s and 70s rock playlist duration. Compact style bearing frame for use with new mechanical gas seals. A positive displacement pump delivers a fixed amount of fluid per revolution. Small compact, lightweight design equals less pump and more performance. Definitions and terms density density is the mass of a substance per unit volume. Piston compressors deliver compressible media such as gas or air. Components of positive displacement motors pdms a positive displacement motor is made up of four basic components. A positive displacement downhole mud motor is a downhole tool which is used during field drilling operations to provide rotational power to drill bits and other downhole tools.
Right angle reducer also available for additional space savings. A circulating drilling fluid is pumped through the positive displacement motor, converting the hydraulic power of the fluid into mechanical power to drive the drill bit. Positive displacement motors theory and application. Variable speed pumping a guide to successful applications, executive summary is the result of a collaboration between the hydraulic institute, europump, and the u. Blocking rotor gear 8 is placed on the end of the blocking rotor. Stator life of a positive displacement downhole drilling motor. Performance curve for a positive displacement pump flow rate head 2. This may or may not include other accessories required to sustain operation of the compressor at the rating conditions. To make a good choice between these pump types it is. Today, despite the increasing use of rotary steerable systems, positive displacement motors. Comparison of turbine with positive displacement meters. Positive displacement motor pdm the use of mud motors is greatly dependent on financial ef ficiency. Positive displacement pumps with positive displacement pumps the flow rate q is linear dependent on the pump speed n.
The second is to help the user analyze their pumping requirements, make an appropriate pump selection and size the pump, motor and drive for best performance. The ends of the rotors protrude through the bearing plates. An advantage of mud lubricated bearings is that there are no limitations on bit pressure drop compared to a sealed bearing assembly and temperature is not generally an issue. Universal series trufit positive displacement pumps. Milp83950 not 1 pump, vacuum, positive displacement. Jun 08, 2012 best rock songs vietnam war music best rock music of all time 60s and 70s rock playlist duration.
Positive displacement motors theory and applications robello samuel. Submersible motor positive displacement nuclear specialty pump supplier to the world. Find your local representatives within your region for product inquiries. This pump can provide the mud at varying flow rates and. The pcpd pump uses drilling fluid commonly referred to as drilling mud, or just mud to create eccentric motion in the power section of the motor which is transferred as. Piston compressors are positive displacement machines. The deployment of a new positive displacement motor pdm technology as a solution to improve drilling. The motor current will therefore increase approximately proportional to the increase in frequency. In straight hole drilling, the motor functions as a drilling performance tool to increase the rate of penetration and reduce.
Rvortex is a straighttype motor with a reinforced bearing section for use with rotary steerable systems rss rforce is a new type of motors to be used at maximum drilling parameters in all well types design features. Positive displacement pumps are excellent for applications that require high pressure, with some models producing over 1,000 psi 2,300 ft. Drill string rotation can be eliminated by having a motor placed downhole to drive the bit by hydraulic or electrical power. Generally, we express density in units of pounds per cubic inch.
A positive displacement motor is made up of four basic components. This book presents functional, operational and technical aspects of positive displacement motor. Pumps operate by some mechanism typically reciprocating or rotary, and consume energy to perform mechanical work moving the fluid. Aug 18, 2016 a down hole motor used in the oil field to drive the drill bit or other down hole tools during directional drilling or performance drilling applications. Information and documents presented here are works of the u. This package provides full skid control and protection of your motor and positive displacement piston pump. Positivedisplacement pumps frequently are used in hydraulic systems at pressures ranging up to 5000 psi. The rating points in this standard are based on commonly used refrigerants. Aerzen manufactures all key components in house, from the assembly through to the control system and, in so doing, the familyrun company places value on quality and. Ma4 positive displacement meter for lpg motor fuel dispensers. Positive displacement pdm and turbine tms are the two types of flowmeters acceptable as primary measurement instruments for custody transfer of liquid petroleum products. The three rotors are supported by bearing plates 6, 7. Jan 01, 2015 the positive displacement motors covers the full spectrum of topics in terms of analysis and design of the downhole mud motor that serves the workhorse of the downhole drilling system for several decades.
Pumps and pumping system bureau of energy efficiency 116 figure 6. We present in this paper a comprehensive and universal toolmodel for the mud motor power section. However the average torque of a positive displacement compressor such as a reciprocating compressor is usually approximately constant under constant load conditions. Positive displacement motors can also be used for performance drilling, straight hole drilling, coring, underreaming, and milling operations. Milp83950 not 1 pump, vacuum, positive displacement, electric motor driven no ss document document status. The company positive displacement blowers are efficient, longlasting, robust and are used around the world. Government and are not subject to protection in the u.
The new technology of the positive displacement motor was developed wi. Stator life of a positive displacement downhole drilling motor article pdf available in journal of energy resources technology 1212 june 1999 with 2,227 reads how we measure reads. Department of energys doe industrial technologies program. The pcpd pump uses drilling fluid commonly referred to as drilling mud, or just mud to create eccentric motion in the power section of the motor which is transferred as concentric power to the drill bit. Diamond bits, matched to motor and fluid steerable motor will investigate pdm positive displacement motors, technical fallback is turbine but issue matching with drill bit. There is a great variety of positive displacement pumps. Understanding a positive displacement pump motor electric. It is mainly used in directional drilling operations. Every cycle of the meters mechanism displaces a precisely defined positive quantity of fluid, so that a count of the number of mechanism cycles yields a precise quantity for the total fluid volume passed through the flow meter. Close coupled positive displacement pump trufit models, with various configurations available.
Displacement rotor gears 9, 10 are placed on the ends of the displacement rotors. This standard applies to electric motor driven, single and variable capacity positive displacement condensing units for aircooled, evaporativelycooled, and watercooled refrigeration applications. When to use a centrifugal or a positive displacement pump pd pump is not always a clear choice. Pdf the power section of a positive displacement drill motor pdm consists of a steel rotor and a tribe with a molded elastomeric lining. Selection and integration of positive displacement motors. Due to the positive displacement pumps design however, if kept in operation against a closed discharge valve, it will continue to build pressure until the line bursts, the pump is damaged, or both. A principal advantage of hydraulic power is the high power density power per unit weight that can be achieved. Centrifugal and positive displacement pumps course no. A positive displacement machine in which an increase in refrigerant vapor pressure is attained by changing the internal volume of the compression chamber through work applied to the compressors mechanism. A positive displacement pump causes a fluid to move by trapping a fixed amount of it.
Positive displacement rotary pumps are pumps that move fluid using the. A down hole motor used in the oil field to drive the drill bit or other down hole tools during directional drilling or performance drilling applications. Variable speed pumping a guide to successful applications. As drilling fluid is pumped through the positive displacement motor, it converts the hydrauli. Also there was some debate originally as to whether or not the positive displacement pump was a constant torque load, on page 19 on the pdf toolbar of the baldor reference the pump is listed as a constant torque load.
A surface pump on the drilling platform or ground moves the drilling mud through the drillstring to the pdm. From the controls point of view, however, they are all similar. Figure 21 shows a generic process with a positive displacement pump in this case a gear pump connected to deliver liquid from a to b. New positive displacement motor technology significantly.
Reinforced bearing section and shorter bit box to bend. Tms use a bladed rotor contained in a flow tube that is axially suspended in the direction of flow. A mud motor or drilling motor is a progressive cavity positive displacement pump pcpd placed in the drill string to provide additional power to the bit while drilling. To make a good choice between these pump types it is important to understand that these two types of pumps behave very differently. In straight vertical holes, the mud motor may be used solely for increased rate of penetration rop, or to minimize erosion and wear on the drill string, since the drill string does not need to be turned as fast. A pump is a device that moves fluids liquids or gases, or sometimes slurries, by mechanical action. Rvortex is a straighttype motor with a reinforced bearing section for use with rotary steerable systems rss. Back to basics a characteristic resistance coefficient, or value, which k can be found in perrys handbook 1 and other sources table 1 2. Positive displacement pumps frequently are used in hydraulic systems at pressures ranging up to 5000 psi. Positive displacement motorsequipment and supplies. The second is to help the user analyze their pumping requirements, make an appropriate pump selection and size the. In straight hole drilling, the motor functions as a drilling performance tool to increase the rate of penetration and reduce casing wear by minimizing drillstring rotation. They also provide a fixed displacement per revolution and, within mechanical limitations, infinite pressure to move fluids. Pump maintenance michigan water environment association.
See following pdf file for detailed specifications. Specific gravity specific gravity is used to compare the density of a product to the density of water. The pdm bearing section contains a mudlubricated bearing stack that utilize a stacked ballandrace to handle thrust loads, while carbide radial bearings handle side loads. There is a reason behind the proverbial reliability of the machines. Pumps can be classified into three major groups according to the method they use to move the fluid. A positivedisplacement downhole mud motor is a downhole tool which is used during field drilling operations to provide rotational power to drill bits and other downhole tools. Rforce motors allow intense angle buildup, effective well trajectory control, drill string rotation rate. Pdf stator life of a positive displacement downhole drilling motor. Positive displacement pumps features and a positive. Positive displacement pumps features and a positive displace. Liquid controls is a world renowned supplier of reliable, highaccuracy, positive displacement pd metering systems.
Positive displacement pdf when to use a centrifugal or a positive displacement pump pd pump is not always a clear choice. Prime horizontals mud motor or drilling motor is a progressive cavity positive displacement pump. In the search for a viable alternative to conventional rotary drilling in which the entire drill string is rotated from surface, various types of downhole motors have. Todays positive displacement motors are based on the work of rene moineau, a french.
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