This disambiguation page lists articles associated with the title positive displacement. Reciprocating pumps include piston, plunger, and diaphragm types. Some positive displacement pumps use an expanding cavity on the suction side and a decreasing cavity on the discharge side. 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 m35 and m44 variable motors feature a trunnion style swashplate and direct displacement control. Positive displacement motors can also be used for performance drilling, straight hole drilling, coring, underreaming, and milling operations. Positive displacement drilling motors oil and gas online. A positive displacement pump makes a fluid move by trapping a fixed amount of the fluid and forcing displacing that trapped volume into a discharge pipe or discharge system. Submersible motor positive displacement nuclear specialty files prepared by tricomb2b. Irrigation pumps, in general, are driven either by engines or electric motors. The f11 series is available in sizes 5, 6, 10, 12, 14 and 19 cc. Positive displacement motor pdm the use of mud motors is greatly dependent on financial ef ficiency. As drilling fluid is pumped down the drillstring, the fluid flows through the cavities in the power section. Oct 17, 2016 another major difference between the pump types is the effect viscosity has on the capacity of the pump.
Mud motors convert hydraulic energy from the drilling fluid into mechanical energy. Besides, a positive displacement motor pdm has been designed from scratch as. 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. We take a life cycle costs lcc approach to pump design, enabling us to provide you with the right technology for your fluids and operating environment. 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. Angelo di pietros rotary positive displacement air engine. Reinforced bearing section and shorter bit box to bend. Types and selection of pumps the mechanical device or arrangement by which water is caused to flow at increased pressure is known as a pump and the process of using a pump for this purpose is known as pumping. 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. Unfortunately, hydraulic pumps and motors have many leakage paths from high pressure to low pressure, so a signi. A positive displacement pump moves a fixed volume of fluid within the pump casing by applying a force to moveable boundaries containing the fluid volume.
About positive displacement pumps hydraulic institute. This part also exports a drilling report in pdf format. It is used when the flow rate of a liquid must be closely controlled. Understanding a positive displacement pump motor electricpete electrical 4 dec 09 16. Todays positive displacement motors are based on the work of rene moineau, a french. Positive displacement motors theory and applications robello samuel. Specific gravity specific gravity is used to compare the density of a product to the density of water. Two rotors are arranged on parallel shafts and driven by an external synchronous gear box. Tms use a bladed rotor contained in a flow tube that is axially suspended in the direction of flow. Positive displacement pumps features and a positive. These rotary lobe machines are typically used for polymer powder or pellet transfer and come in different sizes.
A positive displacement pump moves a fixed volume of fluid within the pump casing by applying a force to. 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. All system equipment, such as motors, sheaves, drive couplings, speed reducers, etc. Nonpositive displacement pumps definition statement. The micon downholetools positive displacement motors. Positive displacement pumps performance and application by david b.
These pumps are characterized by their close running clearances. We present in this paper a comprehensive and universal toolmodel for the. 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 been proposed. For use with and driven by the universal dynamometer mfp100, available separately, the positive displacement pump module is part of tecquipments modular fluid power range. Request pdf physics of failure analysis of power section assembly for positive displacement motor power section assembly is the core part of positive. Our aims are to 1 emphasize the basic prin ciple involved in the operation. Positive displacement motor pdm the positive displacement motors pdm of micon downholetools gmbh apply the reverse pumping principle. They each have very different behaviors and if not familiar with them, it may be difficult to understand how a positive displacement pump could fit into your process. Stand alone metering capabilitystand alone metering capability. Precise metered displacement of fluid typically gph or. Hydraulic pumps and motors are almost exclusively positive displacement devices. When used with one of the optional pumps, the positive displacement pump support module is ideal for student experiments, demonstrations and projects. Series 40 axial piston motors technical information manual. Positive displacement pump or centrifugal which one do you.
Hunting is a leader in progressivecavity, positive displacement mud motors. The flow rate with low viscosity material is up to gpm49 lpm. Specifications for the series 90 motors are listed here for quick reference. Centrifugal and positive displacement pumps course no. They operate with a positive transfer and should not work against a closed system. The power is transmitted from the electric motor or any other type of driver such as diesel engine to the pump. References relevant to classification in this subclass this subclassgroup does not cover. Formula for calculating the electric motor power rating. Non positive displacement pumps definition statement this subclassgroup covers. Selection of a positive displacement pd rotary pump is not always an easy choice. Positive displacement pumps is a current reference guide for positive displacement pumps for both traditional and stateoftheart testing methods, and serves as a bridge between textbooks and manufacturers literature by providing equipment testing practices based on technical knowhow, practical experience, and academic theory. Understanding a positive displacement pump motor electric. Samuels unique blend of skills as a field engineer, researcher, and instructor has.
Efforts are underway to acquire the capacity to undertake. 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. These downhole drilling motors, coupled with measurements while drilling mwd tools and proper stabilization allow directional wells to be drilled with one bottom hole assembly. A diaphragm pump also known as a membrane pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or te on diaphragm and suitable valves either side of the diaphragm check valve, butter y valves, ap. Operation and maintenance manual universal i series. 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. A positive displacement pump delivers a fixed amount of fluid per revolution. Positive displacement pumps features and a positive displace. It can be used in numerous applications in both open and closed loop circuits. Series 40 motors also use the parallel axial piston slipper design in conjunction with a fixed or tiltable swashplate. Positive displacement pumps positive displacement pumps are hydrostatic machines. The second is to help the user analyze their pumping requirements, make an appropriate pump selection and size the pump, motor.
It is smaller than any internal combustion engine although the size may differ between models unlike other rotary engines, the di pietro motor uses a simple cylindrical rotary piston shaft driver which rolls, with next. Traditionally there have been two standards for blowers, iso 5389 for dynamic compressors and blowers centrifugal, turbo, etc. Pdf positive displacement pumps are critical to applications ranging from drug delivery to water jet cutters. Rforce is a new type of motors to be used at maximum drilling parameters in all well types. All rotary pumps are designed after the same principle. As always, the process controls engineer has the responsibility of matching the capacity of a specific piece of equipment to the demands of the process at every instant in time. Jan 21, 2011 a positive displacement pump pd is a device that maintains a constant flow without regard to pressure changes. If an internal link led you here, you may wish to change the link to point directly to the intended article.
A diaphragm pump also known as a membrane pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or te on diaphragm and suitable valves either side of the diaphragm check valve, butter y valves, ap valves, or any other form of shuto valves to pump a uid. 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. Most pd pumps can be adapted to handle a wide range of applications, but some types are better suited than. Mechanical strength improvement of mud motors elastomer by nano clay and. Components of positive displacement motors pdms a positive displacement motor is made up of four basic components. Please provide the formulas for calculating the electric power rating for positive displacement pump progressive cavity, screw pumps, gear pump and reciprocating pumps. Best practices for downhole motor operations in coiled. Features and options motor type inline, axial piston, closed loop, positive displacement motors direction of rotation bidirectional, see outline drawings for rotation vs. Different types of pumps positive displacement pumps. The fluid pressure reacts against the lobes of the rotor and the walls of the stator causing the rotor to rotate.
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. Modeling a variable speed drive for positive displacement pump. We leverage 30 years of drilling experience to combine the right torque, speed, and flow capabilities in our positivedisplacement mud motors. 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. Calculation of the flow rate of a plunger or piston pump based off of standard, measurable dimensions of a the pump.
Motors technical basics the baker hughes inteq navidrill tool is a positive displacement motor pdm used as a downhole drive in deep drilling operations. Selection and integration of positive displacement motors. On a test stand the flow rate is determined for various speeds and total head i. Positive displacement pumps with positive displacement pumps the flow rate q is linear dependent on the pump speed n. Downhole motors come in two basic types positive displacement motors pdm from chemical e pete 355 at kwame nkrumah uni. It is the configuration of these two parts that determines the motor s operating characteristics of flow rate.
They also provide a fixed displacement per revolution and, within mechanical limitations, infinite pressure to move fluids. Cpx cpxs cpxm cpxp cpxr cpxv pump division files prepared by tricomb2b. A rotary pump is a positive displacement pump consisting of a chamber containing gears, cams, screws, vanes, plungers, or similar elements actuated by relative rotation of the driveshaft to casing, and which has no separate inlet and outlet valves. Selection and integration of positive displacement motors into. The volume of liquid moved by the pump in one cycle one suction stroke and one discharge stroke is equal to the change in the liquid volume of the cylinder as the piston moves from its farthest left position to its farthest right position. Definitions and terms density density is the mass of a substance per unit volume.
By combining straight and curve sections, any desired bore path can be realized. 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. Formula for calculating the electric motor power rating posted in industrial professionals. If no variation is possible in the input drive ratio to the pump, select the pump with a displacement nearest to. Positive displacement motorsequipment and supplies. Operation and maintenance manual universal i series positive displacement pumps. This package provides full skid control and protection of your motor and positive displacement piston pump. In this chapter, you will be introduced to different types of centrifugal and positive displacement pumps and their various distinguishing external features such as their construction and components. Pumps are available with a sensitive adjustable relief valve for rapid opening and damped closing and can be fitted with relief valve jacking device for manual by passrecirculation of liquid. The positive displacement motor pdm has been used in directional drilling now for several years and is a key component in bottom hole drilling assemblies. Positive displacement motors theory and application. As the rotors rotate, the chamber formed between the rotors, housing and. A surface pump on the drilling platform or ground moves the drilling mud through the drillstring to the pdm. A positive displacement pumps is a constant flow machine a positive displacement pump must never operate against closed valves on the discharge side of the pump it.
Use of downhole positive displacement motors with a bent housing bent. In addition, we expose how combining accurate profile measurements of the. Drilling motor design the toro motor is a positive displacement motor pdm. Here at pcm, we offer a wide range of positive displacement pumps, designed to meet your needs whatever industry youre working in. Calculation of horsepower based off of flow rate, pressure, and efficiency flow rate. The major disadvantage of piston positive displacement pumps is that material volumes are determined by the piston stroke which is manually set with an adjustable collar. Positive displacement an overview sciencedirect topics. How a positive pump operates positive displacement pump operation assuming sufficient nipr positive displacement pumps use two opposing, rotating elements rotors to displace product from the suction side of the pump to the discharge side of the pump. It is mainly used in directional drilling operations. Solids and slurry merge into the returning flow path and are flushed out. Liquid flows into the pumps as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. You will notice in the flow rate chart how the centrifugal pump loses flow as the viscosity goes up but the positive displacement pumps flow actually increases. The positive displacement motor pdm has been used in directional drilling now for several years.
Drill string rotation can be eliminated by having a motor placed downhole to drive the bit by hydraulic or electrical power. Positive displacement pump design and calculation tajilapak. Motors transfer fluid power into mechanical power translational or rotary. Look inside positive displacement motor sigma quadrant. Physics of failure analysis of power section assembly for positive. This book presents functional, operational and technical aspects of positive displacement motor. 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. Downhole motors come in two basic types positive displacement. Nov 12, 2016 positive displacement pump makes a fluid move by traping a fixed amount and forcing displacing that trapped volume into the discharge pipe. Positive displacement pumps positive displacement pumps, which lift a given volume for each cycle of operation, can be divided into two main classes, reciprocating and rotary. As drilling fluid is pumped through the positive displacement motor, it converts the hydrauli.
The performance and efficiency of hydraulic pumps and. Thinker, researcher, innovator, thought leader, author, educator, educationist dr. Pump and motor volumetric efficiency can be found from the performance curves or by using 96% and 97%, respectively, for these efficiency values. A positive displacement pump has an expanding cavity on the suction side and a decreasing cavity on the discharge side. A rotodynamic or non positive displacement pump imparts velocity energy to the fluid, which is converted to pressure energy upon exiting the pump casing. For definitions and additional information, see operating parameters on page 8. Non positive displacement pumps for liquids, for elastic fluids, or for liquids and elastic fluids, whether rotary or not having pure rotation. The di pietro motor, developed by the australian company engineair, is a rotary engine powered by compressed air. The family includes m25, m35, m44 fixed motor units and m35, m44, m46 variable motor units. Positive displacement pump problems 5 overview of pump problems typically found on positive displacement pumps.
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 the hydraulic power of the fluid into mechanical power so as to rotate the bit. Generally, we express density in units of pounds per cubic inch. Rvortex is a straighttype motor with a reinforced bearing section for use with rotary steerable systems rss.
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. Comparison of turbine with positive displacement meters. A principal advantage of hydraulic power is the high power density power per unit weight that can be achieved. System is a synergistic blend of environmentally green components designed to increase. Positive displacement pumps principle of operation. Some positive displacement pumps use an expanding cavity on on the suction side and a decreasing cavity on the suction side expands and the liquid flows out of the discharges side. An increasing volume is opened to suction, filled, closed, moved to discharge. Waukesha pumps are positive displacement, low slip. Positive displacement pdm and turbine tms are the two types of flowmeters acceptable as primary measurement instruments for custody transfer of liquid petroleum products.
Jul 31, 2014 the decision to choose a positive displacement pump over a centrifugal is not always a clear one. Positive displacement pumps frequently are used in hydraulic systems at pressures ranging up to 5000 psi. The positive displacement motor produces torque as fluid is pumped through its power section, consisting of the rotor and stator. Listed below are 12 reasons why the hydraulic institute suggests using positive displacement pumps pd pumps. Introduction to problem solving positive displacement pumps.
644 926 1565 1347 1559 1058 948 492 122 581 635 279 1344 1126 453 689 1364 250 725 1313 1157 946 228 307 471 992 753 428 247 590 141 1304 560 1480 395 1034 1327 264 1144 492 509 81 805 194 860 766 601 607 346 351