Pdf stator life of a positive displacement downhole drilling motor. Milp83950 not 1 pump, vacuum, positive displacement. 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. Compact style bearing frame for use with new mechanical gas seals. The new technology of the positive displacement motor was developed wi. Find your local representatives within your region for product inquiries. The company positive displacement blowers are efficient, longlasting, robust and are used around the world.
Back to basics a characteristic resistance coefficient, or value, which k can be found in perrys handbook 1 and other sources table 1 2. 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. 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. The deployment of a new positive displacement motor pdm technology as a solution to improve drilling. Displacement rotor gears 9, 10 are placed on the ends of the displacement rotors. Positive displacement motors theory and application. 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. 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.
This may or may not include other accessories required to sustain operation of the compressor at the rating conditions. Selection and integration of positive displacement motors. Pumps can be classified into three major groups according to the method they use to move the fluid. Performance curve for a positive displacement pump flow rate head 2. Liquid controls is a world renowned supplier of reliable, highaccuracy, positive displacement pd metering systems.
The motor current will therefore increase approximately proportional to the increase in frequency. Blocking rotor gear 8 is placed on the end of the blocking rotor. 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. Positivedisplacement pumps frequently are used in hydraulic systems at pressures ranging up to 5000 psi. From the controls point of view, however, they are all similar. Drill string rotation can be eliminated by having a motor placed downhole to drive the bit by hydraulic or electrical power. 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. Pumps and pumping system bureau of energy efficiency 116 figure 6. 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. Positive displacement pdf when to use a centrifugal or a positive displacement pump pd pump is not always a clear choice.
It is mainly used in directional drilling operations. Rforce is a new type of motors to be used at maximum drilling parameters in all well types. 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. Small compact, lightweight design equals less pump and more performance. Tms use a bladed rotor contained in a flow tube that is axially suspended in the direction of flow. 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. This package provides full skid control and protection of your motor and positive displacement piston pump. 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.
Comparison of turbine with positive displacement meters. A positive displacement motor is made up of four basic components. Underbalanced drilling operations manual and the appropriate motor. Milp83950 not 1 pump, vacuum, positive displacement, electric motor driven no ss document document status.
Piston compressors deliver compressible media such as gas or air. Specific gravity specific gravity is used to compare the density of a product to the density of water. The rating points in this standard are based on commonly used refrigerants. The ends of the rotors protrude through the bearing plates. Positive displacement motor pdm the positive displacement motors pdm of micon downholetools gmbh apply the reverse pumping principle. Pumps operate by some mechanism typically reciprocating or rotary, and consume energy to perform mechanical work moving the fluid. On a test stand the flow rate is determined for various speeds and total head i. Positive displacement motors theory and applications robello samuel. Positive displacement pumps frequently are used in hydraulic systems at pressures ranging up to 5000 psi. A surface pump on the drilling platform or ground moves the drilling mud through the drillstring to the pdm.
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. Centrifugal and positive displacement pumps course no. 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. Positive displacement motorsequipment and supplies. Department of energys doe industrial technologies program. Generally, we express density in units of pounds per cubic inch. Right angle reducer also available for additional space savings. 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. Reinforced bearing section and shorter bit box to bend. Jun 08, 2012 best rock songs vietnam war music best rock music of all time 60s and 70s rock playlist duration. Motors transfer fluid power into mechanical power translational or rotary. Positive displacement pumps features and a positive displace.
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. Components of positive displacement motors pdms a positive displacement motor is made up of four basic components. A positive displacement flow meter is a cyclic mechanism built to pass a fixed volume of fluid through with every cycle. Positive displacement pumps are excellent for applications that require high pressure, with some models producing over 1,000 psi 2,300 ft. Information and documents presented here are works of the u. There is a reason behind the proverbial reliability of the machines. 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. Positive displacement motor pdm the use of mud motors is greatly dependent on financial ef ficiency. A principal advantage of hydraulic power is the high power density power per unit weight that can be achieved. A pump is a device that moves fluids liquids or gases, or sometimes slurries, by mechanical action. We present in this paper a comprehensive and universal toolmodel for the mud motor power section. 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.
However the average torque of a positive displacement compressor such as a reciprocating compressor is usually approximately constant under constant load conditions. New positive displacement motor technology significantly. A positive displacement pump delivers a fixed amount of fluid per revolution. This book presents functional, operational and technical aspects of positive displacement motor. Definitions and terms density density is the mass of a substance per unit volume.
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. Rvortex is a straighttype motor with a reinforced bearing section for use with rotary steerable systems rss. Pump maintenance michigan water environment association. Ma4 positive displacement meter for lpg motor fuel dispensers.
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. To make a good choice between these pump types it is important to understand that these two types of pumps behave very differently. Understanding a positive displacement pump motor electric. Piston compressors are positive displacement machines. Best rock songs vietnam war music best rock music of all time 60s and 70s rock playlist duration. Today, despite the increasing use of rotary steerable systems, positive displacement motors. The piston displacement element forms a space with variable volume together with cylinder and cylinder cover. The three rotors are supported by bearing plates 6, 7. In straight hole drilling, the motor functions as a drilling performance tool to increase the rate of penetration and reduce. 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. There is a great variety of positive displacement pumps. The second is to help the user analyze their pumping requirements, make an appropriate pump selection and size the. See following pdf file for detailed specifications.
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 pumps with positive displacement pumps the flow rate q is linear dependent on the pump speed n. Whether your business requires flow measurement for custody transfer or process control, with an lc pd meter on your delivery vehicle, at your. Close coupled positive displacement pump trufit models, with various configurations available.
Submersible motor positive displacement nuclear specialty pump supplier to the world. 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. To make a good choice between these pump types it is. 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 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. Stator life of a positive displacement downhole drilling motor. This pump can provide the mud at varying flow rates and. 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. Government and are not subject to protection in the u.
This standard applies to electric motor driven, single and variable capacity positive displacement condensing units for aircooled, evaporativelycooled, and watercooled refrigeration applications. Variable speed pumping a guide to successful applications. The baker hughes navidrill tool is a positive displacement motor pdm. Ma4 positive displacement meter for lpg motor fuel.
Todays positive displacement motors are based on the work of rene moineau, a french. Rforce motors allow intense angle buildup, effective well trajectory control, drill string rotation rate. 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. The rotational motion to a drill bit is provided by the drilling fluid which is pumped into the wellbore with the help of a positive displacement motor that converts. 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. 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. Universal series trufit positive displacement pumps. They also provide a fixed displacement per revolution and, within mechanical limitations, infinite pressure to move fluids.
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