US20140010692A1 - Economical pump - Google Patents
Economical pump Download PDFInfo
- Publication number
- US20140010692A1 US20140010692A1 US13/925,156 US201313925156A US2014010692A1 US 20140010692 A1 US20140010692 A1 US 20140010692A1 US 201313925156 A US201313925156 A US 201313925156A US 2014010692 A1 US2014010692 A1 US 2014010692A1
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- section
- pump
- fluid pump
- fluid
- bore
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- Abandoned
Links
- 239000012530 fluid Substances 0.000 claims abstract description 56
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 12
- 230000004044 response Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 abstract description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 12
- 239000004800 polyvinyl chloride Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
- F04B53/1005—Ball valves being formed by two closure members working in series
-
- 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
- E21B43/127—Adaptations of walking-beam pump systems
Definitions
- This disclosure relates generally to fluid pump construction and, in an example described below, more particularly provides an economically constructed pump.
- FIG. 1 is a representative partially cross-sectional view of a well system and associated method which can embody principles of this disclosure.
- FIG. 2 is an enlarged scale representative cross-sectional view of a pump which can embody principles of this disclosure, the pump being depicted in a fluid lifting configuration.
- FIG. 3 is a representative cross-sectional view of the pump in a fluid receiving configuration.
- FIG. 4 is a representative cross-sectional view of another example of a reciprocating section of the pump.
- FIG. 5 is a representative side view of another example of the reciprocating section of the pump.
- FIG. 1 Representatively illustrated in FIG. 1 is a system 40 for use with a well, and an associated method, which system and method can embody principles of this disclosure.
- system 40 and method are merely one example of an application of the principles of this disclosure in practice, and a wide variety of other examples are possible. Therefore, the scope of this disclosure is not limited at all to the details of the system 40 and method described herein and/or depicted in the drawings.
- a fluid pump 10 is installed in a wellbore 42 , and is in fluid communication with a surface location via a pipe 28 .
- a reciprocation device 44 is used to upwardly and downwardly displace the pipe 28 , thereby operating the pump 10 , so that fluid 36 from an earth formation 46 is pumped to the surface location via the pipe.
- the reciprocation device 44 is depicted as being a pump jack of the type typically used in oil fields to pump hydrocarbons to surface.
- the reciprocation device 44 could be a windmill, a hand-operated lever or crank, or any other device capable of reciprocating the pipe 28 in the wellbore 42 .
- the scope of this disclosure is not limited to use of any particular type of reciprocation device.
- FIGS. 2 & 3 enlarged scale cross-sectional views of the pump 10 are representatively illustrated, apart from the remainder of the system 40 . Note that the pump 10 may be used with other well systems, in keeping with the principles of this disclosure.
- the pump 10 is depicted in a configuration in which the pipe 28 is being displaced upward, and the fluid 36 is flowing into the pump.
- the pump 10 is depicted in a configuration in which the pipe 28 is being displaced downward, and the fluid 36 is flowing from the pump into the pipe.
- the pump 10 as illustrated in FIGS. 2 & 3 can be constructed mainly of non-metal materials (such as, common PVC (polyvinyl chloride) pipe, etc.), and can be assembled and operated without use of any dynamic seals (e.g., without relative motion between a seal and a surface against which the seal seals).
- non-metal materials such as, common PVC (polyvinyl chloride) pipe, etc.
- dynamic seals e.g., without relative motion between a seal and a surface against which the seal seals.
- metal materials and dynamic seals may be used in some examples.
- components of the pump 10 include a bottom seat 12 , balls 14 , 16 , casing 18 , lower bushing 20 , upper seat 22 , pump bushing 24 , lower seat casing 30 and a threaded connector 26 for attachment of the pump to pipe 28 .
- the lower seat 12 and ball 14 comprise a lower check valve 48
- the upper seat 22 and ball 16 comprise an upper check valve 50 .
- the upper check valve 50 is closed, thereby drawing the fluid 36 into the pump 10 as the pipe 28 is raised, and the lower check valve 48 is open, thereby allowing the fluid to enter the pump.
- the lower check valve 48 is closed, thereby preventing the fluid 36 from flowing downwardly out of the pump 10 as the pipe 28 is lowered, and the upper check valve 50 is open, thereby allowing the fluid to flow from the pump into the pipe.
- the balls 14 , 16 are preferably made of stainless steel, but other materials may be used, if desired.
- the bottom seat 12 , casings 18 , 30 , 32 , lower bushing 20 , upper seat 22 , pump bushing 24 and threaded connector 26 are preferably made of PVC material.
- the casings 18 , 30 , 32 , lower bushing 20 , pump bushing 24 and threaded connector 26 can be made from industry standard PVC pipe and fittings, thus making the pump 10 very economical to inventory and manufacture.
- the non-metal components can be quickly and conveniently glued together, thus making the pump 10 very economical to assemble.
- the lower seat 12 allows fluid 36 to enter a variable volume pump chamber 34 from an earth formation (e.g., a water aquifer or hydrocarbon reservoir) by upward displacement of the pipe 28 (as depicted in FIG. 2 ), which enlarges the volume of the chamber.
- a variable volume pump chamber 34 from an earth formation (e.g., a water aquifer or hydrocarbon reservoir) by upward displacement of the pipe 28 (as depicted in FIG. 2 ), which enlarges the volume of the chamber.
- the chamber 34 volume decreases, and the fluid 36 is transferred from the chamber into the pipe.
- This pumping process is accomplished, in this example, by using close tolerances resulting in a very small gap between two sizes of PVC pipe making up the casings 18 , 32 , and without use of any dynamic seals.
- the PVC pieces are machined to different tolerances depending on the actual sizes of PVC used for the pump 10 and pipe 28 . Although a small amount of leakage occurs between the casing 32 and an inner bore 52 of the casing 18 when the chamber 34 expands and contracts, sufficient pressure differential can be created to flow the fluid 36 into the pump 10 , and then into the pipe 28 .
- the PVC pipe used in the construction of this pump 10 can be a combination of schedule 40 pipe and schedule 80 PVC pipe to obtain desired tolerances for each nominal size pump.
- a smaller PVC piece e.g., casing 32
- slides inside a slightly larger piece e.g., casing 18
- an upper section 54 (comprising the upper connector 26 , casing 32 , bushing 24 and check valve 50 ) reciprocates relative to a lower section 56 (comprising the casing 18 , bushing 20 , casing 30 and check valve 48 ) to pump the fluid 36 , without use of any dynamic seal between the sections.
- the top connector 26 is preferably threaded and glued to PVC pipe 28 , although other materials and connection methods may be used, in keeping with the principles of this disclosure. No additional seal or packing material is needed to perform the pumping process. No electricity is required for the operation of this pump (although electricity could be used to power a motor to reciprocate the pipe 28 , if desired).
- the upper section 54 can be made entirely or mostly of metal, so that it is more wear resistant and suitable for, e.g., oil field applications, situations where the fluid 36 may be somewhat abrasive, etc.
- the lower section 56 can be similarly constructed entirely or mostly of metal.
- the threaded connector 26 is internally threaded for 1′′ line pipe, but other types of threads may be used, if desired.
- the pump bushing 24 is replaced by a pin 58 disposed transversely through the casing 32 , and the pin is welded, threaded, press-fit or otherwise secured in place.
- the seat 22 is retained between two threaded together sections 32 a,b of the casing 32 .
- FIG. 5 a side view of another example of the upper section 54 is representatively illustrated.
- a plurality of radially reduced annular grooves or recesses 60 are formed on an exterior of the casing 32 . These grooves or recesses 60 may be helpful to reduce leakage between the casings 18 , 32 , for example, by increasing resistance to flow through the gap between the casing 32 and the bore 52 of the casing 18 in which it reciprocates.
- grooves or recesses 60 may be helpful to prevent sand and/or debris from passing between the casings 32 , 18 , for example, by increasing turbulence in the gap between the casings.
- the grooves or recesses 60 are not necessary in keeping with the scope of this disclosure.
- the pump 10 can be economically manufactured and assembled, and can operate reliably for a extended period of time due to an absence of any dynamic seals in the pump.
- the pump 10 can include a first section 54 which reciprocates relative to a second section 56 , whereby fluid 36 is pumped between the first and second sections 54 , 56 .
- the fluid pump 10 may be devoid of any dynamic seal.
- the first section 54 may be received in a bore 52 of the second section 56 , and a relatively small gap between the bore 52 and the first section 54 may allow only minimal leakage of the fluid 36 between the bore 52 and the first section 54 .
- Each of the first and second sections 54 , 56 can include a check valve 48 , 50 .
- the check valve 48 , 50 can include a ball 14 , 16 which seals against a non-metal seat 12 , 22 .
- the ball 14 , 16 may be contained in a non-metal casing 30 , 32 .
- the first section 54 may be received in a bore 52 of the second section 56 , and recesses 60 formed on an outer surface of the first section 54 may reciprocate in the bore 52 .
- a volume of a chamber 34 of the pump 10 may vary in response to reciprocation of the first section 54 relative to the second section 56 .
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
A fluid pump can include one section which reciprocates relative to another section, whereby fluid is pumped between the sections. The fluid pump can be devoid of any dynamic seal. Each of the pump sections can include a check valve. Structural components of the pump can be made of a non-metal material. One section can be received in a bore of the other section, and a relatively small gap between the bore and the one section can allow minimal leakage of the fluid between the bore and the one section.
Description
- This disclosure relates generally to fluid pump construction and, in an example described below, more particularly provides an economically constructed pump.
- In some economically disadvantaged areas, such as central Africa, Honduras, etc., water is not readily available for human consumption or irrigation, due in large part to the fact that equipment needed to pump the water from its source (such as, an underground aquifer) is beyond a local population's means. Therefore, it will be appreciated that an inexpensive pump that can be easily installed and operated would be very beneficial to such an economically disadvantaged population.
- There are other situations, also, in which an economical pump would be of benefit. For example, in some oil fields only marginal production is realized, and so it does not make economic sense to install very expensive pumping equipment. In those situations, the availability of an inexpensive pump would make a difference between whether or not the field is produced.
- Thus, for these reasons and others, the art would be enhanced if economical construction of a fluid pump could be provided.
-
FIG. 1 is a representative partially cross-sectional view of a well system and associated method which can embody principles of this disclosure. -
FIG. 2 is an enlarged scale representative cross-sectional view of a pump which can embody principles of this disclosure, the pump being depicted in a fluid lifting configuration. -
FIG. 3 is a representative cross-sectional view of the pump in a fluid receiving configuration. -
FIG. 4 is a representative cross-sectional view of another example of a reciprocating section of the pump. -
FIG. 5 is a representative side view of another example of the reciprocating section of the pump. - Representatively illustrated in
FIG. 1 is asystem 40 for use with a well, and an associated method, which system and method can embody principles of this disclosure. However, it should be clearly understood that thesystem 40 and method are merely one example of an application of the principles of this disclosure in practice, and a wide variety of other examples are possible. Therefore, the scope of this disclosure is not limited at all to the details of thesystem 40 and method described herein and/or depicted in the drawings. - In the
FIG. 1 example, afluid pump 10 is installed in awellbore 42, and is in fluid communication with a surface location via apipe 28. At the surface location, areciprocation device 44 is used to upwardly and downwardly displace thepipe 28, thereby operating thepump 10, so thatfluid 36 from anearth formation 46 is pumped to the surface location via the pipe. - In
FIG. 1 , thereciprocation device 44 is depicted as being a pump jack of the type typically used in oil fields to pump hydrocarbons to surface. However, in other examples, thereciprocation device 44 could be a windmill, a hand-operated lever or crank, or any other device capable of reciprocating thepipe 28 in thewellbore 42. Thus, the scope of this disclosure is not limited to use of any particular type of reciprocation device. - Referring additionally now to
FIGS. 2 & 3 , enlarged scale cross-sectional views of thepump 10 are representatively illustrated, apart from the remainder of thesystem 40. Note that thepump 10 may be used with other well systems, in keeping with the principles of this disclosure. - In
FIG. 2 , thepump 10 is depicted in a configuration in which thepipe 28 is being displaced upward, and thefluid 36 is flowing into the pump. InFIG. 3 , thepump 10 is depicted in a configuration in which thepipe 28 is being displaced downward, and thefluid 36 is flowing from the pump into the pipe. - The
pump 10 as illustrated inFIGS. 2 & 3 can be constructed mainly of non-metal materials (such as, common PVC (polyvinyl chloride) pipe, etc.), and can be assembled and operated without use of any dynamic seals (e.g., without relative motion between a seal and a surface against which the seal seals). However, metal materials and dynamic seals may be used in some examples. - In the
FIGS. 2 & 3 example, components of thepump 10 include abottom seat 12,balls casing 18,lower bushing 20,upper seat 22,pump bushing 24,lower seat casing 30 and a threadedconnector 26 for attachment of the pump topipe 28. Thelower seat 12 andball 14 comprise alower check valve 48, and theupper seat 22 andball 16 comprise anupper check valve 50. - Note that, in the
FIG. 2 configuration, theupper check valve 50 is closed, thereby drawing thefluid 36 into thepump 10 as thepipe 28 is raised, and thelower check valve 48 is open, thereby allowing the fluid to enter the pump. In theFIG. 3 configuration, thelower check valve 48 is closed, thereby preventing thefluid 36 from flowing downwardly out of thepump 10 as thepipe 28 is lowered, and theupper check valve 50 is open, thereby allowing the fluid to flow from the pump into the pipe. - The
balls bottom seat 12,casings lower bushing 20,upper seat 22, pump bushing 24 and threadedconnector 26 are preferably made of PVC material. - The
casings lower bushing 20, pump bushing 24 and threadedconnector 26 can be made from industry standard PVC pipe and fittings, thus making thepump 10 very economical to inventory and manufacture. The non-metal components can be quickly and conveniently glued together, thus making thepump 10 very economical to assemble. - The
lower seat 12 allowsfluid 36 to enter a variablevolume pump chamber 34 from an earth formation (e.g., a water aquifer or hydrocarbon reservoir) by upward displacement of the pipe 28 (as depicted inFIG. 2 ), which enlarges the volume of the chamber. Upon downward displacement of the pipe 28 (as depicted inFIG. 3 ), thechamber 34 volume decreases, and thefluid 36 is transferred from the chamber into the pipe. - This pumping process is accomplished, in this example, by using close tolerances resulting in a very small gap between two sizes of PVC pipe making up the
casings pump 10 andpipe 28. Although a small amount of leakage occurs between thecasing 32 and aninner bore 52 of thecasing 18 when thechamber 34 expands and contracts, sufficient pressure differential can be created to flow thefluid 36 into thepump 10, and then into thepipe 28. - The PVC pipe used in the construction of this
pump 10 can be a combination ofschedule 40 pipe and schedule 80 PVC pipe to obtain desired tolerances for each nominal size pump. A smaller PVC piece (e.g., casing 32) slides inside a slightly larger piece (e.g., casing 18) to enable the pumping action. Thus, an upper section 54 (comprising theupper connector 26,casing 32, bushing 24 and check valve 50) reciprocates relative to a lower section 56 (comprising thecasing 18, bushing 20,casing 30 and check valve 48) to pump thefluid 36, without use of any dynamic seal between the sections. - The
top connector 26 is preferably threaded and glued toPVC pipe 28, although other materials and connection methods may be used, in keeping with the principles of this disclosure. No additional seal or packing material is needed to perform the pumping process. No electricity is required for the operation of this pump (although electricity could be used to power a motor to reciprocate thepipe 28, if desired). - Note that it is not necessary for the
upper section 54 to reciprocate within thelower section 56 since, in other examples, a lower end of the upper section could outwardly overlap an upper end of thelower section 56. Thus, the scope of this disclosure is not limited to any particular details of thepump 10 as depicted inFIGS. 2 & 3 . - Referring additionally now to
FIG. 4 , another example of theupper section 54 is representatively illustrated. In this example, theupper section 54 can be made entirely or mostly of metal, so that it is more wear resistant and suitable for, e.g., oil field applications, situations where thefluid 36 may be somewhat abrasive, etc. Although not shown inFIG. 4 , thelower section 56 can be similarly constructed entirely or mostly of metal. - In the
FIG. 4 example, the threadedconnector 26 is internally threaded for 1″ line pipe, but other types of threads may be used, if desired. In addition, thepump bushing 24 is replaced by apin 58 disposed transversely through thecasing 32, and the pin is welded, threaded, press-fit or otherwise secured in place. - The
seat 22 is retained between two threaded togethersections 32 a,b of thecasing 32. This demonstrates that the scope of this disclosure is not limited to use of PVC or any other non-metal material in thepump 10. Any suitable material may be used for any component(s) of thepump 10, in keeping with the principles of this disclosure. - Referring additionally now to
FIG. 5 , a side view of another example of theupper section 54 is representatively illustrated. In this view, it may be seen that a plurality of radially reduced annular grooves orrecesses 60 are formed on an exterior of thecasing 32. These grooves orrecesses 60 may be helpful to reduce leakage between thecasings casing 32 and thebore 52 of thecasing 18 in which it reciprocates. - In addition, the grooves or
recesses 60 may be helpful to prevent sand and/or debris from passing between thecasings recesses 60 are not necessary in keeping with the scope of this disclosure. - It may now be fully appreciated that the above disclosure provides significant advances to the art of economically constructing fluid pumps. In examples described above, the
pump 10 can be economically manufactured and assembled, and can operate reliably for a extended period of time due to an absence of any dynamic seals in the pump. - The above disclosure provides to the art a
fluid pump 10. In one example, thepump 10 can include afirst section 54 which reciprocates relative to asecond section 56, wherebyfluid 36 is pumped between the first andsecond sections fluid pump 10 may be devoid of any dynamic seal. - The
first section 54 may be received in abore 52 of thesecond section 56, and a relatively small gap between thebore 52 and thefirst section 54 may allow only minimal leakage of the fluid 36 between thebore 52 and thefirst section 54. - Each of the first and
second sections check valve check valve ball non-metal seat ball non-metal casing - The
first section 54 may be received in abore 52 of thesecond section 56, and recesses 60 formed on an outer surface of thefirst section 54 may reciprocate in thebore 52. A volume of achamber 34 of thepump 10 may vary in response to reciprocation of thefirst section 54 relative to thesecond section 56. - Although various examples have been described above, with each example having certain features, it should be understood that it is not necessary for a particular feature of one example to be used exclusively with that example. Instead, any of the features described above and/or depicted in the drawings can be combined with any of the examples, in addition to or in substitution for any of the other features of those examples. One example's features are not mutually exclusive to another example's features. Instead, the scope of this disclosure encompasses any combination of any of the features.
- Although each example described above includes a certain combination of features, it should be understood that it is not necessary for all features of an example to be used. Instead, any of the features described above can be used, without any other particular feature or features also being used.
- It should be understood that the various embodiments described herein may be utilized in various orientations, such as inclined, inverted, horizontal, vertical, etc., and in various configurations, without departing from the principles of this disclosure. The embodiments are described merely as examples of useful applications of the principles of the disclosure, which is not limited to any specific details of these embodiments.
- In the above description of the representative examples, directional terms (such as “above,” “below,” “upper,” “lower,” etc.) are used for convenience in referring to the accompanying drawings. However, it should be clearly understood that the scope of this disclosure is not limited to any particular directions described herein.
- The terms “including,” “includes,” “comprising,” “comprises,” and similar terms are used in a non-limiting sense in this specification. For example, if a system, method, apparatus, device, etc., is described as “including” a certain feature or element, the system, method, apparatus, device, etc., can include that feature or element, and can also include other features or elements. Similarly, the term “comprises” is considered to mean “comprises, but is not limited to.”
- Of course, a person skilled in the art would, upon a careful consideration of the above description of representative embodiments of the disclosure, readily appreciate that many modifications, additions, substitutions, deletions, and other changes may be made to the specific embodiments, and such changes are contemplated by the principles of this disclosure. For example, structures disclosed as being separately formed can, in other examples, be integrally formed and vice versa. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the invention being limited solely by the appended claims and their equivalents.
Claims (20)
1. A fluid pump, comprising:
a first section which reciprocates relative to a second section, whereby fluid is pumped between the first and second sections, and
wherein the fluid pump is devoid of any dynamic seal.
2. The fluid pump of claim 1 , wherein the first section is received in a bore of the second section, and a relatively small gap between the bore and the first section allows minimal leakage of the fluid between the bore and the first section.
3. The fluid pump of claim 1 , wherein each of the first and second sections comprises a check valve.
4. The fluid pump of claim 3 , wherein the check valve comprises a ball which seals against a non-metal seat.
5. The fluid pump of claim 4 , wherein the ball is contained in a non-metal casing.
6. The fluid pump of claim 1 , wherein the first section is received in a bore of the second section, and wherein recesses are formed on an outer surface of the first section, whereby the recesses reciprocate in the bore.
7. The fluid pump of claim 1 , wherein a volume of a chamber of the pump varies in response to reciprocation of the first section relative to the second section.
8. A fluid pump, comprising:
a first section which reciprocates relative to a second section, whereby fluid is pumped between the first and second sections, and
wherein each of the first and second sections comprises a check valve.
9. The fluid pump of claim 8 , wherein the fluid pump is devoid of any dynamic seal.
10. The fluid pump of claim 8 , wherein the first section is received in a bore of the second section, and a relatively small gap between the bore and the first section allows minimal leakage of the fluid between the bore and the first section.
11. The fluid pump of claim 8 , wherein the check valve comprises a ball which seals against a non-metal seat.
12. The fluid pump of claim 11 , wherein the ball is contained in a non-metal casing.
13. The fluid pump of claim 8 , wherein the first section is received in a bore of the second section, and wherein recesses are formed on an outer surface of the first section, whereby the recesses reciprocate in the bore.
14. The fluid pump of claim 8 , wherein a volume of a chamber of the pump varies in response to reciprocation of the first section relative to the second section.
15. A fluid pump, comprising:
a first section which reciprocates relative to a second section, whereby fluid is pumped between the first and second sections, and
wherein the first section is received in a bore of the second section, and a relatively small gap between the bore and the first section allows minimal leakage of the fluid between the bore and the first section.
16. The fluid pump of claim 15 , wherein the fluid pump is devoid of any dynamic seal.
17. The fluid pump of claim 15 , wherein each of the first and second sections comprises a check valve.
18. The fluid pump of claim 17 , wherein the check valve comprises a ball which seals against a non-metal seat.
19. The fluid pump of claim 18 , wherein the ball is contained in a non-metal casing.
20. The fluid pump of claim 15 , wherein recesses are formed on an outer surface of the first section, whereby the recesses reciprocate in the bore.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/925,156 US20140010692A1 (en) | 2012-07-05 | 2013-06-24 | Economical pump |
Applications Claiming Priority (3)
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US201261668183P | 2012-07-05 | 2012-07-05 | |
US201361817197P | 2013-04-29 | 2013-04-29 | |
US13/925,156 US20140010692A1 (en) | 2012-07-05 | 2013-06-24 | Economical pump |
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US20140010692A1 true US20140010692A1 (en) | 2014-01-09 |
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US13/925,156 Abandoned US20140010692A1 (en) | 2012-07-05 | 2013-06-24 | Economical pump |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1603675A (en) * | 1926-06-22 | 1926-10-19 | Robert H Folsom | Oil-well pump |
US1832346A (en) * | 1930-01-28 | 1931-11-17 | John A Yerkes | Traveling tube pump |
US1840493A (en) * | 1928-11-03 | 1932-01-12 | Joseph G Dyer | Pump plunger |
US5028213A (en) * | 1988-04-19 | 1991-07-02 | American Sigma, Inc. | Convertible and variable-length groundwater devices, components therefor, and methods of constructing and utilizing same |
US6497561B2 (en) * | 2000-02-01 | 2002-12-24 | Skillman Pump Company, Llp | Downstroke sucker rod pump and method of use |
US20120141310A1 (en) * | 2011-02-17 | 2012-06-07 | Justin Conyers | Sand plunger for downhole pump |
US8647083B2 (en) * | 2007-08-21 | 2014-02-11 | Michael Brent Ford | Plunger for a sucker rod pump |
-
2013
- 2013-06-24 US US13/925,156 patent/US20140010692A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1603675A (en) * | 1926-06-22 | 1926-10-19 | Robert H Folsom | Oil-well pump |
US1840493A (en) * | 1928-11-03 | 1932-01-12 | Joseph G Dyer | Pump plunger |
US1832346A (en) * | 1930-01-28 | 1931-11-17 | John A Yerkes | Traveling tube pump |
US5028213A (en) * | 1988-04-19 | 1991-07-02 | American Sigma, Inc. | Convertible and variable-length groundwater devices, components therefor, and methods of constructing and utilizing same |
US6497561B2 (en) * | 2000-02-01 | 2002-12-24 | Skillman Pump Company, Llp | Downstroke sucker rod pump and method of use |
US8647083B2 (en) * | 2007-08-21 | 2014-02-11 | Michael Brent Ford | Plunger for a sucker rod pump |
US20120141310A1 (en) * | 2011-02-17 | 2012-06-07 | Justin Conyers | Sand plunger for downhole pump |
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