WO2009039602A1 - Artificial lift mechanisms - Google Patents
Artificial lift mechanisms Download PDFInfo
- Publication number
- WO2009039602A1 WO2009039602A1 PCT/CA2007/001714 CA2007001714W WO2009039602A1 WO 2009039602 A1 WO2009039602 A1 WO 2009039602A1 CA 2007001714 W CA2007001714 W CA 2007001714W WO 2009039602 A1 WO2009039602 A1 WO 2009039602A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- accordance
- gas
- linear motor
- spring
- chamber
- Prior art date
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 54
- 238000005086 pumping Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims description 61
- 239000011261 inert gas Substances 0.000 claims description 13
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003129 oil well Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
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- 239000010959 steel Substances 0.000 description 3
- 241000283074 Equus asinus Species 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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- 238000005461 lubrication Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/13—Lifting well fluids specially adapted to dewatering of wells of gas producing reservoirs, e.g. methane producing coal beds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
- F04B47/04—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
Definitions
- the present invention relates to a form of mechanism intended to drive a reciprocating pump to lift liquids from a deep well or borehole.
- a piston and non-return-valve unit at the base of the well or borehole (which may be several thousand metres deep) is generally connected to the drive mechanism at the surface by means of a long steel rod that, being assembled in sections and screwed together, is known as a rod string.
- the topmost section of that string the section that emerges from the well through a pressure seal — necessarily has a higher surface finish and is known as the polished (or polish) rod.
- the polished rod is directly connected to the reciprocating mechanism that forms the invention described herein.
- the powered end of the reciprocating beam unit has either been driven by a linear actuator, similar to an early steam engine design (the Atmospheric or Newcomen engine) or by a crank mechanism, driven in turn by a rotary engine, such as an electric, petrol, gas or diesel engine.
- a linear actuator similar to an early steam engine design (the Atmospheric or Newcomen engine) or by a crank mechanism, driven in turn by a rotary engine, such as an electric, petrol, gas or diesel engine.
- a rotary engine such as an electric, petrol, gas or diesel engine.
- These engines have a low output torque and a heavy duty gearbox must be interposed to reduce the rotary speed and to increase the torque of the crank that moves the beam.
- the long steel string that connects the drive mechanism at the top of the well with the pump itself at the base of the well has a weight of several tonnes, which must also be supported by the beam. To increase the efficiency of the mechanism, the weight has to be counterbalanced.
- the traditional machine has many moving parts and it is required to operate for 24 hrs. a day, 365 days a year for several years, so it will be understood that it needs regular inspection, lubrication, maintenance and repair.
- pumping mechanisms in the past have been designed with regard to their mechanical function alone.
- the process of their design has been entirely focussed on providing a reliable method of raising and lowering a long rod string within a shaft through which the liquid is itself raised on the upstroke of the pump.
- no significant thought was given to means of sensing the efficacy of the pumping operation or of reacting to special conditions that may strongly affect the loads on the pumping apparatus.
- the mechanisms of the prior art do not generally incorporate within themselves the ability to sense and to react appropriately to conditions such as a dry well, a broken rod string or a stuck valve.
- United States Patent No. 5,196,770 issued March 23, 1993, to Marine Petroleum Equipment, also describes a cylindrical linear electric actuator. In this case it is placed at the head of a well and drives the heavy rod string to move the submerged pump.
- the proposed linear electric motor is much larger, heavier, more complex and more expensive than that proposed in United States 5,960,875. It is described as being of inductive design, or in the alternative as being of synchronous, asynchronous or variable reluctance design. Unfortunately, all of these are known to be inefficient at the velocities and reciprocation rates that are typical of jack pumping operations. It is also costly to make such linear electric motors to a standard that would allow them to pass the safety regulations for electrical power devices in a flammable gas environment.
- the proposed machine has a fixed (predetermined) counterbalance in the form of a large mechanical weight at the far end of a cable that turns 180 degrees around a sheave, so that both the cable and the sheave bearing are highly stressed and will need frequent replacement.
- a pneumatic cylinder or a pair of such cylinders
- gas spring that is pressurized to provide a (predetermined) counterbalance force.
- Canadian Patent No. 2,250,739, issued May 30, 2006, to Raos provides for a machine in which the prime mover is a simple linear motor that is conceived to have a short rectangular armature that runs between two rectangular stators. It is very difficult, if not impossible, to design such a motor that is capable of producing the large forces required to drive the machine while remaining efficient at the slow speeds demanded by the application and meeting the statutory requirements for safety in an oil field environment.
- the form of the preferred counterbalance is said to be that of a very large steel spring, compressed between the base of the machine and the electrical armature, so as to support the armature against the deadload of the rod string. (It will be understood that the weight of the rod string may approach ten tonnes).
- the force exerted by a spring is directly proportional to its compression or extension.
- a common requirement for such a counterbalance is that the force shall remain within ten percent of its set value while the armature travels through a stroke distance of plus or minus 1.25 metres (total displacement 2.5 metres or 100 inches). That means that the length of the spring when compressed to support the rod string must be about 12.5 metres or 40 feet — and that its uncompressed length has to be about 50 feet.
- Canadian Patent No. 2,250,739 teaches the advantages of an electric linear motor with respect to its ability to change its stroke and speed under remote control and in automatic response to local emergency conditions, it does not describe any method by which those conditions might be detected - and the ability of the machine to detect and to respond to emergency conditions is not therefore claimed.
- the invention has applicability in all forms of liquid recovery from deep shafts and boreholes.
- the prior art inventions in which it is proposed that a vertically-disposed linear electric motor will be used to drive the motion of a jack pump by direct connection to its rod string have limitations in four critical areas:
- One object of the present invention is to construct a thoroughly-practical reciprocating pumping (or “artificial lift") mechanism using a very powerful and highly efficient type of electric linear motor in combination with an adaptive inert gas spring counterbalance, the apparatus being especially suitable for use in association with oil wells and those for de-watering underground gas reservoirs.
- novel artificial lift mechanism in combination with an electronic drive unit of conventional design and standard specification, will be capable of sensing a variety of pumping conditions, of reporting them to a distant monitoring centre, of responding to remote commands and/or of reacting immediately and automatically in a predetermined way to several emergency conditions.
- the novel artificial lift mechanism shall be compact, fully enclosed, relatively light in weight and lower in cost than mechanisms of the prior art, while meeting all statutory regulations for such equipment in oilfield conditions. It is a further objective of this invention that the machine shall be so constructed as to allow energy to be stored during one part of the pump cycle in such a manner that it can be recovered during a later part of the cycle, so as to improve the efficiency of the reciprocating mechanism.
- each standard marc or model can be so controlled as to suit a wide range of wells, thus reducing the number of different models that are necessary to satisfy the market, minimizing stock inventory, manufacturing cost and training for field work.
- the principal advantages of the invention include: i.
- the mechanisms of the prior art have employed many stressed moving parts, on whose continuing and satisfactory operation the reliability of the whole depends.
- the sole moving part is the extendible member, so that the mechanism is inherently reliable and needs little maintenance; ii. Because the machine is generally placed vertically above the shaft from which the polished rod exits the well, the mechanical stress is orthogonal to the bearing surfaces and bearing wear is minimized; iii. Power consumption is also minimized because the gas counterbalancing mechanism is continually tuned to that parameter; iv.
- the inert gas that is used for the counterbalancing function is pressurized within the body of the electrical system, so that it thereby acts also to prevent any flammable gases or liquid aerosols from coming into contact with the electrical apparatus, removing the risk of a fire or an explosion;
- the use of the machine in association with an electronic drive unit having drive current output signals and subsidiary computing facilities allows the apparatus to be self-monitoring, self-adjusting and self- protecting so as to maximise productivity and minimize service time; vi.
- the machine consumes little inert gas in normal operation because it is fitted with an economising chamber by which the diurnal temperature variations (which would normally lead to significant consumption of the inert gas) are accommodated without loss; vii.
- the machine is entirely enclosed and safe from accidental contact by humans or animals, so that protective arrangements surrounding the well head are simplified; viii.
- the machine is completely silent and may be used in ecologically- sensitive areas; ix.
- the parameters of the reciprocating motion (stroke length, cycling frequency, waveform, etc.) can be automatically controlled according to predetermined strategies and in response to any type of pumping condition that may arise, thus conserving the life of the machine while maximizing productivity; and x. Because the parameters of the counterbalance system are automatically adjusted to an individual load, and because the stroke, stroke frequency and waveform of the reciprocating cycle are independently, remotely and automatically variable over a wide range, physically identical ("standard") machines can be applied to many different pump specifications. Thus the necessary product range is minimized, manufacturing costs are reduced, stockholding is simplified and the time for product training and site work is shortened.
- the machine is comprised of at least one cylindrical electromagnetic linear actuator placed above and adjacent the well-head, the electromagnetic linear actuator being fully enclosed and having a sliding gas seal through which an extendible member emerges from the body of the actuator, the pumping string being connected to the extendible member by means of a polished rod or equivalent component, the deadload of the pumping string being supported by the pressure of an inert gas within the body of the sealed electromagnetic actuator, the reciprocating motion of the pumping string being driven by the electromagnetic forces on the extendible member, the inert gas pressure being automatically adjusted so as to minimize power consumption, there being an intermediate pressure chamber and valves arranged to reduce gas consumption that would otherwise be caused by diurnal temperature cycles, the actuator being controlled by an electronic drive unit and having means incorporated therein or communicable thereto for measuring the instantaneous current required to drive the said actuator, the said current measurements being analyzed according to predetermined algorithms, the inert gas counterbalancing pressure and the modes of action of the pumping mechanism being arranged to respond automatically according to the said algorithms, the relevant data being also
- the position of the extendible member will be measured by means of an appropriate transducer and the electromagnetic actuator forming part of that extendible member will be supplied with electric current via a standard type of electronic drive unit, originally designed for use with rotary motors and commonly available for factory automation purposes.
- a standard drive unit has a number of very useful features, whereby both the current supplied to the motor and the drive voltage across the motor terminals are sampled at frequent intervals. (The current is a direct measure of the force produced by the motor and the voltage is a measure of the speed with which it is moving.)
- an electronic drive unit will commonly have spare power supply outputs and spare computing power available, sometimes on separate plug-in modules.
- the extendible member is commanded to follow a sinusoidal waveform of predetermined amplitude and frequency, the drive current demanded by the motor being sampled, as an example, 100 times per cycle.
- the current measurements are divided into two groups - those in which the movement is upwards and those in which the movement is downwards — and the root mean square of the motor drive current is computed for each group.
- the rms values are repeated for, as an example, ten complete cycles and the values added. If, for example, the difference between the two values exceeds a tolerance value in such a way that the power required to raise the extendible member is significantly greater than that required to lower it, the mass of gas in the spring is increased by opening a control valve for a total time proportional to the excess.
- the same algorithm will immediately detect the difference in force required to move the string and cause the pressure in the gas spring to be quickly reduced to protect the machine. The pumping action might then be stopped completely, or the motion reduced to a small amplitude only. The difference in gas pressure before and after the break will provide an immediate estimate of the position of the breakage, so that estimate might be automatically computed and transmitted to a central monitoring facility.
- the pattern of current values (i.e. the measurements of instantaneous power taken by the motor) contains detailed information about the quantity of liquid in the rising column and the rate at which it is being pumped. Further automatic analysis of that data might therefore be used to prepare regular monitoring reports for telemetry to a central monitoring station.
- the actuator or actuators will be cylindrical with an extendible member of cylindrical cross section and they will incorporate the gas spring within the actuator casing. It will be understood that in the alternative the gas spring or springs might be conveniently constructed and disposed separately from the electromagnetic actuators.
- the polished rod of the pumping string will pass through an open cylindrical channel on the central axis of a single actuator, the cylindrical channel being arranged to separate the polished rod from the pressurized body of the machine, leaving the polished rod "outside" the actuator itself.
- the machine may be constructed from a plurality of actuators symmetrically disposed athwart the polished rod and connected thereto by means of a crosshead.
- the electrical system is the stator and the magnet array is the armature, but in an alternative arrangement of this invention the electrical system may be the armature and the magnet array may be the stator.
- Figure 1 is a schematic cross section of a basic cylindrical mechanism
- Figure 2 is a schematic illustration of an alternative arrangement to that shown in Figure 1 ;
- Figure 3 is a schematic illustration of a further alternative arrangement to that shown in Figure 1 ;
- Figure 4 is a schematic illustration of an arrangement by which gas may be conserved that would otherwise be lost by reason of diurnal temperature changes
- FIG. 1 shown is a diagrammatic vertical cross section of a basic cylindrical mechanism in which the polished rod of the pump string 1 is suspended from a disc 2 by means of a shackle or flexible coupling 3.
- the flexible coupling is necessary to accommodate the small tolerances in alignment that may exist or that may momentarily occur between the axis of the machine and the direction of the applied force.
- the rod 1 passes through a cylindrical channel or cavity in the body of the mechanism, the channel or cavity being bounded by the upper tube 7 and the lower tube 5.
- the interior of the mechanism is made gas-tight by means of the seal and bearing unit 8 between the coaxial tubes 5 and 7.
- the rod string 1 is raised and lowered by means of the extendible cylinder 6 to which the disc 2 is affixed on its uppermost outer surface.
- the cylinder 6 extends variably from the body of the machine 4 through a second bearing and seal unit 9.
- the position of the cylinder 6 is controlled by the force produced by the interaction of electrical currents in the conductor vanes 12 with magnetic fields produced by the permanent magnet and pole piece array 1 1.
- the deadload of the pump rod string 1 is counterbalanced by the force on the effective area of the extendible cylinder 6, produced by the pressure of inert gas within the internal volume of the machine 10.
- the gas pressure in the volume 10 will vary adiabatically according to the position of the extendible member 6 during pumping cycle.
- the electromagnetic actuator 12, 11 will cause energy to be stored within and drawn from the gas spring in such a manner that the electrical power consumption is minimized and the peak electrical power demand is greatly reduced.
- the actuator 1 1, 12 is also fitted with a vented upper casing or cap 13, (the vents not being shown in this Figure) whose purpose is to protect the surface of the extendible member 6 and that of the upper seal 9 from the effects of weather, salt, grit and other aspects of the external environment that might be detrimental to the life of the machine. It is another function of the cap 13 to complete the enclosure of the mechanism so that no animal or person can be harmed by accidental contact therewith.
- FIG. 2 shown is an alternative arrangement in which a plurality of electromagnetic linear actuators may be connected to the polished rod by means of a cross-head piece.
- FIG. 2 shown for clarity are two such electromagnetic linear actuators, being symmetrically disposed athwart the polished rod and constructed to contain pressurized extendible members forming gas springs, thus providing both a counterbalancing force and an energy storage device in association with the masses of the rod string and of the liquid column. Similar numerals depict the same elements as those employed in Figure 1.
- Figure 3 shows a further diagrammatic alternative arrangement in which at least one unit has a pure pneumatic function and does not contain an electromagnetic actuator, so that it acts only as a gas spring.
- the crosshead joining the gas spring units 14 might be orthogonal to the crosshead joining the linear motors.
- any arrangement of a plurality of gas spring components and a plurality of linear electric motor components, whether or not the functions of those components are combined, will perform the required function without changing the nature of the invention.
- Figure 4 shows a diagrammatic arrangement of the intermediate or economizing pressure chamber 16 and electrically-operated valves 17, 18 and 19. It will be understood that the valves may actually be mounted within the sealed chamber 16 and thus immersed in an inert gas environment. It should first be recognized that the pressure of the gas in the counterbalancing mechanism 10 is not constant, but varies during the pumping cycle, reaching a minimum when the extendible member 6 is raised to its uppermost point and being at a maximum when the pumping string is at its lowest point.
- the pressure of gas in the economizing chamber 16 is approximately the same as the median pressure of gas in the gas spring chamber 10.
- valve 17 is opened, for a short period only, while the gas spring pressure in 10 is at or near its lowest point. Gas will then pass from the economy chamber into the gas spring volume. Conversely, if it is necessary to reduce the mass of gas within the spring 10, the valve 17 is opened, for a short period only, while the spring pressure is at its maximum value.
- the chief use of the economy chamber is related to the diurnal temperature cycle. It will be understood, for example, that in the heat of the day both the gas in the spring and the gas in the economy chamber will increase in pressure, but that it will still be possible by the method described above to reduce the mass of gas in the spring when required - and thus to optimise the electrical power consumption of the artificial lift mechanism — by moving the surplus gas into the economy chamber without actually disposing of it. In the evening of the same day the temperature of the mechanism will fall and it will be necessary to move gas back into the spring 10 from the economy chamber 16 in order to maintain its pressure at that temperature so as to produce the correct counterbalancing force. The reverse flow is accomplished by timing the operation of valve 17 in the manner previously described — but in this case the valve is opened for a short time when the extendible member is at the top of its stroke and the pressure in the gas spring chamber is at a minimum.
- Valve 19 connects the economy chamber to the primary source of gas supply 20; valve 18 allows the economy chamber to be vented to atmosphere if required.
- Pressure transducer 21 measures the difference in pressure between the gas spring and the economy chamber at all times. If, during the short interval when valve 17 is opened to allow gas from the economy chamber 16 to flow into the gas spring chamber 10, the differential pressure between them is less than, for example, 0.5 Bar, valve 19 is also opened for a predetermined interval so as to increase the pressure in the economy chamber 16. Conversely, if, during the short interval when valve 17 is opened to allow gas to flow from the gas spring into the economy chamber, the reverse differential pressure is less than, for example, 0.5 Bar, valve 18 is also opened for a predetermined interval so as to reduce the pressure in the economy chamber. It will be understood that this feature of our invention corrects the gas spring settings for gradual temperature changes and for any slow gas leakage that might occur.
- the resulting axial force is smaller than that produced by a machine using permanent magnetic fields or by a machine that uses fields produced by electromagnets, that form of construction is even lower in cost and lighter in weight.
- the cost and weight advantages may, in some circumstances, offset the lower efficiency of the induction motor.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
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Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CA2007/001714 WO2009039602A1 (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
MX2010003221A MX2010003221A (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms. |
GB1003929A GB2465714A (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
CN200780100793A CN101815871A (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
CA2697984A CA2697984C (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
US12/679,087 US20100310385A1 (en) | 2007-09-25 | 2007-09-25 | Artificial Lift Mechanisms |
ROA201000287A RO125784A2 (en) | 2007-09-25 | 2007-09-25 | Gas-lift mechanisms |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CA2007/001714 WO2009039602A1 (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009039602A1 true WO2009039602A1 (en) | 2009-04-02 |
Family
ID=40510690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2007/001714 WO2009039602A1 (en) | 2007-09-25 | 2007-09-25 | Artificial lift mechanisms |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100310385A1 (en) |
CN (1) | CN101815871A (en) |
CA (1) | CA2697984C (en) |
GB (1) | GB2465714A (en) |
MX (1) | MX2010003221A (en) |
RO (1) | RO125784A2 (en) |
WO (1) | WO2009039602A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011022826A1 (en) * | 2009-08-27 | 2011-03-03 | Crostek Management Corp. | Artificial lift structures |
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Publication number | Priority date | Publication date | Assignee | Title |
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GB2504114A (en) * | 2012-07-18 | 2014-01-22 | Neda Al-Anezi | Piston pump intended to raise fluid |
CN103452473B (en) * | 2013-08-20 | 2015-11-18 | 河北建设勘察研究院有限公司 | One utilizes tunneling boring high counterweight drill bit device to carry out small-diameter deep well construction method |
CN104047577A (en) * | 2014-05-28 | 2014-09-17 | 河南理工大学 | Linear motor direct-driven pumping unit |
US9677390B2 (en) * | 2014-12-04 | 2017-06-13 | Amik Oilfield Equipment And Rentals Ltd. | Reciprocating pump drive assembly |
US11988656B2 (en) | 2015-09-21 | 2024-05-21 | Mcwane, Inc. | Remote monitoring of water distribution system |
WO2017053396A1 (en) | 2015-09-21 | 2017-03-30 | AMI Investments, LLC | Remote monitoring of water distribution system |
US10731762B2 (en) | 2015-11-16 | 2020-08-04 | Baker Hughes, A Ge Company, Llc | Temperature activated elastomeric sealing device |
US10087698B2 (en) | 2015-12-03 | 2018-10-02 | General Electric Company | Variable ram packer for blowout preventer |
US10214986B2 (en) | 2015-12-10 | 2019-02-26 | General Electric Company | Variable ram for a blowout preventer and an associated method thereof |
CN110213632B (en) * | 2019-04-23 | 2021-07-30 | 浙江六客堂文化发展有限公司 | Video playing system containing user data processing and use method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2122888A (en) * | 1934-10-03 | 1938-07-05 | Joseph F Mcleer | Electrical drill or hammer |
CA2250739A1 (en) * | 1996-03-29 | 1997-10-09 | Davor Jack Raos | Sucker rod pump actuating device |
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- 2007-09-25 CA CA2697984A patent/CA2697984C/en not_active Expired - Fee Related
- 2007-09-25 MX MX2010003221A patent/MX2010003221A/en not_active Application Discontinuation
- 2007-09-25 CN CN200780100793A patent/CN101815871A/en active Pending
- 2007-09-25 WO PCT/CA2007/001714 patent/WO2009039602A1/en active Application Filing
- 2007-09-25 RO ROA201000287A patent/RO125784A2/en unknown
- 2007-09-25 GB GB1003929A patent/GB2465714A/en not_active Withdrawn
- 2007-09-25 US US12/679,087 patent/US20100310385A1/en not_active Abandoned
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US2122888A (en) * | 1934-10-03 | 1938-07-05 | Joseph F Mcleer | Electrical drill or hammer |
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Cited By (1)
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WO2011022826A1 (en) * | 2009-08-27 | 2011-03-03 | Crostek Management Corp. | Artificial lift structures |
Also Published As
Publication number | Publication date |
---|---|
US20100310385A1 (en) | 2010-12-09 |
GB201003929D0 (en) | 2010-04-21 |
MX2010003221A (en) | 2010-04-07 |
CN101815871A (en) | 2010-08-25 |
RO125784A2 (en) | 2010-10-29 |
GB2465714A (en) | 2010-06-02 |
CA2697984A1 (en) | 2009-04-02 |
CA2697984C (en) | 2015-07-21 |
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