US20120282119A1 - Dynamic compression compensator for submersible pumps - Google Patents
Dynamic compression compensator for submersible pumps Download PDFInfo
- Publication number
- US20120282119A1 US20120282119A1 US13/099,468 US201113099468A US2012282119A1 US 20120282119 A1 US20120282119 A1 US 20120282119A1 US 201113099468 A US201113099468 A US 201113099468A US 2012282119 A1 US2012282119 A1 US 2012282119A1
- Authority
- US
- United States
- Prior art keywords
- diffuser
- ring
- compression ring
- assembly
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
Definitions
- This invention relates to a variable compression methodology to aid in the prevention of diffuser spinning, overheating. and destruction of downhole submersible pumps.
- submersible pumps are an assembly of diffusers 5 and impellers 3 contained within the pump housing 4 , with a shall 2 powered by an external motor (not shown) to supply the rotational power for the impellers 3 which are keyed to the shaft 2 .
- the impellers 3 provide the lift for the well fluids in order to move the fluids to the surface.
- the forces associated with the impeller 3 rotation and fluid lift will, at times, cause associated diffusers 5 to rotate inside the housing 4 when they should not.
- the diffuser 5 rotation generates considerable heat, and can cause housing 4 and/or adjacent stage failures.
- the diffuser stack To prevent the diffusers 5 from spinning due to the hydraulic reaction of the impellers 3 , the diffuser stack, the common reference to all of the diffuser/impeller pairs in the pump, is pre-loaded against the housing 4 . This is achieved by attempting to force an oversize diffuser stack into the pump housing.
- the diffuser stack is made too long using a filler tube that is commonly called the compression tube 1 (also referenced as the compression ring).
- the compression tube 1 also referenced as the compression ring.
- the compression ring 1 is simply a tube of metal, where steel or stainless steel being typical materials used although others may be selected depending on well conditions expected to be encountered or other design considerations.
- the variability in the length of the compression ring 1 can be attributed due to human error during measurements, human error during length calculations.
- the present invention is the design and implementation of a variable compression device to relieve precise measurement errors during the assembly of downhole submersible pumps.
- the invention provides a flexible compression component, expanding to provide the necessary compression if the metallic compression tube is cut short, and compressing to provide the necessary compression if the metallic compression tube is cut too long.
- the invention allows for variable compression caused by normal operational heating of the impellers/diffusers stack within the submersible pump.
- FIG. 1 is a typical submersible pump assembly configuration, with the current compression ring assembly method.
- FIG. 2 is a typical submersible pump assembly configuration, with the variable compression ring added to the assembly.
- variable compression ring 7 , 8 is a ring of hard rubber, plastic, or suitable material (AFLAS, etc.), with a hardness of durometer 90 (an approximate number), where the material 8 provides both compression and elastic properties to accommodate the variation in the compression ring 1 pressure.
- the new dynamic adjustment is provided structural support with a thin metal insert 7 , primarily to provide stability and a metallic interface 6 to the diffuser/impeller stack.
- the compression ring 1 length is calculated taking into account the addition of the variable compression ring 7 , 8 which is compressed to approximately 60% of the unit width, thus providing some pre-loading to the stack. If, in the final assembly, the compression ring 1 is cut too short, the variable compression ring 7 , 8 will expand toward its original width, thus maintaining the required pressure on the diffuser/impeller stack. If the compression ring 1 is cut too long, the variable compression ring 7 , 8 would compress further, again adjusting to provide the pressure desired. During operation, the variable compression ring 7 , 8 would also allow thermal growth of the diffuser/impeller stack, thus preventing undue pressures being applied to the diffuser 3 sidewalls.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A dynamic variable compression ring for use in submersible pumps. where the variable compression ring compensates for metal compression ring measurement errors during assembly. The dynamic variable compression ring also allows for thermal heating of the internal pump components, thus maintaining the desired diffuser compression values.
Description
- This invention relates to a variable compression methodology to aid in the prevention of diffuser spinning, overheating. and destruction of downhole submersible pumps.
- In current designs, reference
FIG. 1 submersible pumps are an assembly ofdiffusers 5 andimpellers 3 contained within thepump housing 4, with a shall 2 powered by an external motor (not shown) to supply the rotational power for theimpellers 3 which are keyed to theshaft 2. Theimpellers 3 provide the lift for the well fluids in order to move the fluids to the surface. The forces associated with theimpeller 3 rotation and fluid lift will, at times, cause associateddiffusers 5 to rotate inside thehousing 4 when they should not. Thediffuser 5 rotation generates considerable heat, and can causehousing 4 and/or adjacent stage failures. - To prevent the
diffusers 5 from spinning due to the hydraulic reaction of theimpellers 3, the diffuser stack, the common reference to all of the diffuser/impeller pairs in the pump, is pre-loaded against thehousing 4. This is achieved by attempting to force an oversize diffuser stack into the pump housing. - The diffuser stack is made too long using a filler tube that is commonly called the compression tube 1 (also referenced as the compression ring). When the stack is captured in the
housing 4, thehousing 4 is placed in tension while the stack is compressed. The resulting normal force betweendiffusers 5 and thecompression tube 1 is applied at thecommon interface point 6, and is enough to generate sufficient friction force to keep thediffusers 5 from spinning. Thecompression ring 1 is simply a tube of metal, where steel or stainless steel being typical materials used although others may be selected depending on well conditions expected to be encountered or other design considerations. - Typical problems that arise with this arrangement include the following:
-
-
compression ring 1 variability, ring cut too short—allowsdiffusers 5 to move and can lead to diffuser 5 spin, housing 4 overheating, and eventual destruction of the pump. -
compression ring 1 variability, ring cut too long—places stress ondiffuser 5 side walls which can lead to side wall collapse and eventual pump failure through reduced output or overheating. -
compression ring 1 variability, ring cut too long—normal operation, but when internal pump parts are heated by normal operation, thermal expansion may create unusual pressures on thediffusers 5, again leading to side wall collapse and eventual pump failure through reduced output or overheating.
-
- The variability in the length of the
compression ring 1 can be attributed due to human error during measurements, human error during length calculations. human error during cutting of the ring itself, relaxation of the diffuser/impeller stack after the hydraulic pressure is removed, as well as other related assembly items that could affect the total assembly. Compound the possible human errors with normal expansion characteristics of the material being used and pump failure can occur. - In a preferred embodiment, the present invention is the design and implementation of a variable compression device to relieve precise measurement errors during the assembly of downhole submersible pumps. The invention provides a flexible compression component, expanding to provide the necessary compression if the metallic compression tube is cut short, and compressing to provide the necessary compression if the metallic compression tube is cut too long. The invention allows for variable compression caused by normal operational heating of the impellers/diffusers stack within the submersible pump.
-
FIG. 1 is a typical submersible pump assembly configuration, with the current compression ring assembly method. -
FIG. 2 is a typical submersible pump assembly configuration, with the variable compression ring added to the assembly. - Given the problems noted in the current technology, some type of dynamic adjustment is needed to provide both constant pressure and pressure relief to the diffuser/impeller stack during pump operation.
- Such a compensator would allow for
compression tube 1 short cuts, providing the necessary expandability to adjust for the short cut, and compensate fur long cuts and thermal growth of other pump components with the ability to compress and maintain the pressure desired on the diffuser/impeller stack. Such an arrangement is illustrated inFIG. 2 . In the preferred embodiment, the variable compression ring 7, 8 is a ring of hard rubber, plastic, or suitable material (AFLAS, etc.), with a hardness of durometer 90 (an approximate number), where the material 8 provides both compression and elastic properties to accommodate the variation in thecompression ring 1 pressure. The new dynamic adjustment is provided structural support with a thin metal insert 7, primarily to provide stability and ametallic interface 6 to the diffuser/impeller stack. - During assembly, the
compression ring 1 length is calculated taking into account the addition of the variable compression ring 7,8 which is compressed to approximately 60% of the unit width, thus providing some pre-loading to the stack. If, in the final assembly, thecompression ring 1 is cut too short, the variable compression ring 7,8 will expand toward its original width, thus maintaining the required pressure on the diffuser/impeller stack. If thecompression ring 1 is cut too long, the variable compression ring 7,8 would compress further, again adjusting to provide the pressure desired. During operation, the variable compression ring 7,8 would also allow thermal growth of the diffuser/impeller stack, thus preventing undue pressures being applied to thediffuser 3 sidewalls.
Claims (3)
1. In the preferred embodiment an assembly and methodology for providing variable pressure to the diffuser/impeller stack in a submersible pump.
2. In the preferred embodiment an assembly for providing variable pressure to the diffuser/impeller stack in a submersible pump to compensate for compression sleeve measurement errors made &ring manufacture, where the variable compression ring is comprised of:
a hard rubber material ring; and
a metallic support ring.
3. In the preferred embodiment an assembly for providing variable pressure to the diffuser/impeller stack in a submersible pump to compensate for thermal expansion of the diffuser/impeller stack during normal operating conditions, where the variable compression ring is comprised of:
a hard rubber material ring; and
a metallic support ring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/099,468 US20120282119A1 (en) | 2011-05-03 | 2011-05-03 | Dynamic compression compensator for submersible pumps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/099,468 US20120282119A1 (en) | 2011-05-03 | 2011-05-03 | Dynamic compression compensator for submersible pumps |
Publications (1)
Publication Number | Publication Date |
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US20120282119A1 true US20120282119A1 (en) | 2012-11-08 |
Family
ID=47090354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/099,468 Abandoned US20120282119A1 (en) | 2011-05-03 | 2011-05-03 | Dynamic compression compensator for submersible pumps |
Country Status (1)
Country | Link |
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US (1) | US20120282119A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180172020A1 (en) * | 2016-12-15 | 2018-06-21 | Saudi Arabian Oil Company | Wellbore tools including smart materials |
US20190010952A1 (en) * | 2017-07-04 | 2019-01-10 | Sulzer Management Ag | Pump casing for a centrifugal pump and centrifugal pump |
US11371326B2 (en) | 2020-06-01 | 2022-06-28 | Saudi Arabian Oil Company | Downhole pump with switched reluctance motor |
US11473589B2 (en) * | 2018-05-18 | 2022-10-18 | Franklin Electric Co., Inc. | Impeller assemblies and method of making |
US11499563B2 (en) | 2020-08-24 | 2022-11-15 | Saudi Arabian Oil Company | Self-balancing thrust disk |
US11591899B2 (en) | 2021-04-05 | 2023-02-28 | Saudi Arabian Oil Company | Wellbore density meter using a rotor and diffuser |
US11644351B2 (en) | 2021-03-19 | 2023-05-09 | Saudi Arabian Oil Company | Multiphase flow and salinity meter with dual opposite handed helical resonators |
US11913464B2 (en) | 2021-04-15 | 2024-02-27 | Saudi Arabian Oil Company | Lubricating an electric submersible pump |
US11920469B2 (en) | 2020-09-08 | 2024-03-05 | Saudi Arabian Oil Company | Determining fluid parameters |
US11994016B2 (en) | 2021-12-09 | 2024-05-28 | Saudi Arabian Oil Company | Downhole phase separation in deviated wells |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971102A (en) * | 1988-08-22 | 1990-11-20 | Galatron S.R.L. | Locking device to fit a mixing valve for hot and cold water into the body of a tap |
US6726449B2 (en) * | 2002-03-18 | 2004-04-27 | Baker Hughes Incorporated | Pump diffuser anti-spin device |
-
2011
- 2011-05-03 US US13/099,468 patent/US20120282119A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971102A (en) * | 1988-08-22 | 1990-11-20 | Galatron S.R.L. | Locking device to fit a mixing valve for hot and cold water into the body of a tap |
US6726449B2 (en) * | 2002-03-18 | 2004-04-27 | Baker Hughes Incorporated | Pump diffuser anti-spin device |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180172020A1 (en) * | 2016-12-15 | 2018-06-21 | Saudi Arabian Oil Company | Wellbore tools including smart materials |
US20190010952A1 (en) * | 2017-07-04 | 2019-01-10 | Sulzer Management Ag | Pump casing for a centrifugal pump and centrifugal pump |
US10837455B2 (en) * | 2017-07-04 | 2020-11-17 | Sulzer Management Ag | Pump casing for a centrifugal pump and centrifugal pump |
US11473589B2 (en) * | 2018-05-18 | 2022-10-18 | Franklin Electric Co., Inc. | Impeller assemblies and method of making |
US11988223B2 (en) | 2018-05-18 | 2024-05-21 | Franklin Electric Co., Inc. | Impeller assemblies and method of making |
US11371326B2 (en) | 2020-06-01 | 2022-06-28 | Saudi Arabian Oil Company | Downhole pump with switched reluctance motor |
US11499563B2 (en) | 2020-08-24 | 2022-11-15 | Saudi Arabian Oil Company | Self-balancing thrust disk |
US11920469B2 (en) | 2020-09-08 | 2024-03-05 | Saudi Arabian Oil Company | Determining fluid parameters |
US11644351B2 (en) | 2021-03-19 | 2023-05-09 | Saudi Arabian Oil Company | Multiphase flow and salinity meter with dual opposite handed helical resonators |
US11591899B2 (en) | 2021-04-05 | 2023-02-28 | Saudi Arabian Oil Company | Wellbore density meter using a rotor and diffuser |
US11913464B2 (en) | 2021-04-15 | 2024-02-27 | Saudi Arabian Oil Company | Lubricating an electric submersible pump |
US11994016B2 (en) | 2021-12-09 | 2024-05-28 | Saudi Arabian Oil Company | Downhole phase separation in deviated wells |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |