EP3655659A1 - Pumping system shaft conversion adapter - Google Patents
Pumping system shaft conversion adapterInfo
- Publication number
- EP3655659A1 EP3655659A1 EP18836077.0A EP18836077A EP3655659A1 EP 3655659 A1 EP3655659 A1 EP 3655659A1 EP 18836077 A EP18836077 A EP 18836077A EP 3655659 A1 EP3655659 A1 EP 3655659A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adapter
- shaft
- ring groove
- pump
- placing
- 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.)
- Withdrawn
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 title description 5
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 125000006850 spacer group Chemical group 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
-
- 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
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
- F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/042—Axially shiftable rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/80—Repairing, retrofitting or upgrading methods
Definitions
- This invention relates generally to the field of submersible pumping systems, and more particularly, but not by way of limitation, to a mechanism for converting shafts used in multistage centrifugal pumps.
- Multistage centrifugal pumps are used in a variety of submersible and surface-based applications.
- each "stage” includes a rotating impeller and a stationary diffuser.
- a shaft keyed only to the impellers transfers mechanical energy from the motor.
- the rotating impeller imparts kinetic energy to the fluid.
- a portion of the kinetic energy is converted to pressure as the fluid passes through the downstream diffuser.
- Up-thrust occurs as fluid moving through the impeller pushes the impeller upward.
- Centrifugal pumps have a flow rate equilibrium point where the up thrust and down thrust generated by the impellers are balanced. Lower flow rates cause excess down thrust, while higher flow rates may cause excess up thrust. To prevent damage to the pump, the up thrust and down thrust must be controlled using one or more thrust bearings.
- the impellers are placed onto the pump shaft and compressed between a pair of two-piece rings located at opposite ends of the pump shaft.
- This design is often referred to as a "fixed impeller” pump and the thrust generated by the collection of impellers is transferred to the "compression shaft” through the lower two-piece ring.
- the thrust is carried by the compression shaft into a large thrust bearing that is often located in a seal section that is adjacent to the pump.
- a floating impeller design in which the impellers are not all linked together under compression.
- the impellers are allowed to move in an axial direction along the shaft during operation and the down thrust generated by the impellers is not transferred through the shaft to a dedicated thrust bearing. Instead, the down thrust created by the impellers is offset by "bearing stages" positioned at intervals within the pump. The impellers must be free to move independently between bearing stages to transfer the thrust to the bearing stages.
- a standard "floater" shaft utilizes snap rings to hold the impellers, spacers and other components to the shaft and allow for free axial movement of the impellers.
- Existing floater shafts thus include specific grooves at specified locations on the shaft to accommodate the snap rings. These grooves are not typically present on a compression shaft. Efforts to retrofit compression shafts to accommodate a floating impeller design are expensive and time consuming because the snap ring grooves must be added to the compression shaft. There is, therefore, a need to develop an adapter system that permits the facilitated conversion of a compression shaft into a floater shaft. It is to these and other objects that the present invention is directed.
- embodiments of the present invention include a pump for use in a motorized pumping system.
- the pump includes a shaft that has a lower ring groove and an upper ring groove.
- the pump also includes a lower adapter and an upper adapter.
- the lower adapter has a pair of lower ring halves configured to fit within the lower ring groove and the upper adapter has a pair of upper ring halves configured to fit within the upper ring groove.
- the pump further includes a plurality of stages that each have a stationary diffuser and a rotating impeller. The rotating impellers are connected to the shaft with a keyed connection that permits the impeller to axially travel along the shaft.
- an embodiment of the invention includes a method for converting a compression shaft to a floater shaft, where the compression shaft includes an upper ring groove and a lower ring groove that are respectively capable of holding an upper two-piece ring and a lower two- piece ring to apply compression to an impeller stack disposed along the compression shaft.
- the method includes the steps of placing an upper adapter into the upper ring groove, placing one or more impellers on the shaft, placing one or more standard spacers on the shaft and placing a lower adapter into the lower ring groove.
- FIG. 1 is an elevational view of a submersible pumping system.
- FIG. 2 is a cross-sectional view of the pump from the submersible pumping system of FIG. 1.
- FIG. 3 is a close-up, cross-sectional view of several stages from the pump of FIG. 2.
- FIG. 4 is a close-up, perspective, cross-sectional view of the upper adapter near the head of the pump.
- FIG. 5 is a cross-sectional view of the head of the pump with upper adapter.
- FIG. 6 is a close-up, perspective, cross-sectional view of the lower adapter in the base of the pump.
- FIG. 7 is a cross-sectional view of the base of the pump with the lower adapter.
- FIG. 8 is a close-up, cross-sectional view of the upper adapter.
- FIG. 9 is a close-up, cross-sectional view of the lower adapter.
- FIG. 10 is a perspective view of the lower adapter.
- FIG. 1 shows an elevational view of a pumping system 100 attached to production tubing 102.
- the pumping system 100 and production tubing 102 are disposed in a wellbore 104, which is drilled for the production of a fluid such as water or petroleum.
- a fluid such as water or petroleum.
- the production tubing 102 connects the pumping system 100 to a wellhead 106 located on the surface.
- the pumping system 100 is primarily designed to pump petroleum products, it will be understood that the present invention can also be used to move other fluids. It will also be understood that, although each of the components of the pumping system are primarily disclosed in a submersible application, some or all of these components can also be used in surface pumping operations.
- the pumping system 100 includes a pump 108, a motor 110 and a seal section 112.
- the motor 110 is an electrical motor that receives power from a surface-mounted motor control unit (not shown). When energized, the motor 110 drives a shaft that causes the pump 108 to operate.
- the seal section 112 provides for the expansion of motor lubricants during operation while isolating the motor 110 from the wellbore fluids passing through the pump 108. Although only one of each component is shown, it will be understood that more can be connected when appropriate. It may be desirable to use tandem-motor combinations, multiple seal sections, multiple pump assemblies or other downhole components not shown in FIG. 1. For example, in certain applications it may be desirable to place a seal section 112 below the motor 110.
- FIG. 2 shown therein is a cross-sectional view of the pump 108.
- the pump 108 includes a pump housing 114, a head 116, a base 118, a shaft 120, and a plurality of stages 122.
- each of the plurality of stages 122 includes a diffuser 124 and an impeller 126.
- the impellers 126 are connected to the shaft 120 with a keyed connection that permits axial movement of the impeller 126 along the shaft 120. In this way, the impellers 126 are permitted a limited amount of axial "float" between adjacent diffusers 124.
- the stages 122 in the pump 108 are configured as either floating stages 128 or bearing stages 130.
- the impeller 126 transfers hydraulic load to the lower or upstream impeller 126 through a standard spacer 132 that passes through the diffuser 124 without interference or contact.
- the impeller 126 transfers down thrust through a spacer 132 to a bearing spacer 136 by contact with a bearing pad 134 in the adjacent diffuser 124. In this way, the hydraulic load created by a collection of impellers 126 is transferred into a diffuser 124 in a bearing stage 130.
- the stages 122 can be configured as a bearing stage 130.
- the pump 108 may also include a separate lower bearing support 138 that includes a bearing pad 134 that offsets thrust carried through a bearing spacer 136.
- FIGS. 4 and 5 shown therein are close-up, cross-sectional views of a portion of the upper end of the pump 108.
- the shaft 120 includes a standard upper ring groove 140 that is configured to accept a conventional two-piece ring (not shown), which would be used in a fixed impeller pump to capture the compression within the impeller stack.
- the two-piece ring has been replaced with an upper adapter 142 for the floating impeller design of the pump 108.
- a close-up, cross-sectional view of upper adapter 142 is shown in FIG. 8.
- the upper adapter 142 includes two upper ring halves 144a, 144b.
- Each of the two upper ring halves 144a, 144b has a width that is configured to fit tightly within the upper ring groove 140.
- Each of the upper ring halves 144a, 144b further includes an upper adapter snap ring groove 146 and an upper adapter shoulder 148.
- the two upper ring halves 144a, 144b are placed into the upper ring groove 140 and approximated.
- An upper adapter snap ring 150 can then be placed into the upper adapter snap ring groove 146 to hold the two upper ring halves 144a, 144b together within the upper ring groove 140.
- set screws or clamps are used to hold the two upper ring halves 144a, 144b together.
- the upper adapter 142 remains fixed with the shaft 120 to contain and position the standard spacers 132 and impellers 126 as they are allowed to move axially along the shaft 120.
- the upper adapter 142 provides a stop and upper limit for the upward, downstream displacement of the top impeller 126 and spacers 132.
- the shaft 120 includes a lower ring groove 152 that is configured to accept a conventional two-piece ring (not shown) that would be used in a fixed impeller pump to capture the compression within the impeller stack.
- the two-piece ring has been replaced with a lower adapter 154 for the floating impeller design of the pump 108.
- Cross-sectional and perspective views of lower adapter 154 are shown in FIGS. 9 and 10, respectively.
- the lower adapter 154 includes two lower ring halves 156a, 156b.
- Each of the two lower ring halves 156a, 156b has a width that is configured to fit tightly within the lower ring groove 152.
- Each of the lower ring halves 156a, 156b further includes a lower adapter snap ring groove 158 and a lower adapter shoulder 160.
- the two lower ring halves 156a, 156b are placed into the lower ring groove 152 and approximated.
- a lower adapter snap ring 162 can then be placed into the lower adapter snap ring groove 158 to hold the two lower ring halves 156a, 156b together within the lower ring groove 152.
- set screws or clamps are used to hold the two lower ring halves 156a, 156b together.
- the lower adapter 154 can be used in combination with the lower bearing support 138 to offset down thrust carried along the shaft 120 while permitting the shaft 120 to lift downstream in the event the up thrust forces exceed the down thrust forces.
- the outer diameter of the lower adapter 154 is smaller than the inner diameter of the lower bearing support 138. This clearance allows the lower adapter 154 to move inside the lower bearing support 138, where the lower adapter should 160 can push the bearing spacer 136 and any standard spacers 132 downstream along the shaft 120 within the tolerances provided by the spaces between the various components connected to the shaft 120.
- the upper adapter 142 and lower adapter 154 provide an efficient mechanism for positioning and retaining the standard spacers 132, bearing spacers 136, impellers 126 and other components disposed along the outside of the shaft 120.
- the upper adapter 142 and lower adapter 154 permit the conversion of a conventional compression shaft into a "floater" shaft without additional machining operations to the shaft 120.
- the ability to quickly and easily convert a compression shaft into a floater shaft reduces inventory demands and improves part
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762535224P | 2017-07-20 | 2017-07-20 | |
PCT/US2018/043079 WO2019018760A1 (en) | 2017-07-20 | 2018-07-20 | Pumping system shaft conversion adapter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3655659A1 true EP3655659A1 (en) | 2020-05-27 |
EP3655659A4 EP3655659A4 (en) | 2021-04-21 |
Family
ID=65015608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18836077.0A Withdrawn EP3655659A4 (en) | 2017-07-20 | 2018-07-20 | Pumping system shaft conversion adapter |
Country Status (6)
Country | Link |
---|---|
US (1) | US20190024665A1 (en) |
EP (1) | EP3655659A4 (en) |
AR (1) | AR112711A1 (en) |
BR (1) | BR112020001126A2 (en) |
CA (1) | CA3070491C (en) |
WO (1) | WO2019018760A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7267181B2 (en) * | 2019-12-05 | 2023-05-01 | 三菱重工業株式会社 | oil drilling pump |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1980337A (en) * | 1933-07-14 | 1934-11-13 | Byron Jackson Co | Impeller mounting |
US2926970A (en) * | 1956-02-20 | 1960-03-01 | Gen Motors Corp | Journal-bearing assembly |
US3402670A (en) * | 1966-06-01 | 1968-09-24 | Borg Warner | Rubber bearing for multistage pump |
JP4633396B2 (en) * | 2004-07-16 | 2011-02-16 | 株式会社荏原製作所 | Centrifugal pump |
BRPI0609213B1 (en) * | 2005-03-11 | 2018-09-25 | Baker Hughes Inc | Centrifugal pump |
CN2866904Y (en) * | 2005-10-09 | 2007-02-07 | 天津市油田采油成套设备有限公司 | Booster water filling electric submersible pump |
RU2330187C1 (en) * | 2006-10-30 | 2008-07-27 | Шлюмбергер Текнолоджи Б.В. (Schlumberger Technology B.V.) | Submerged electrically-driven pump |
FR2951790A1 (en) * | 2009-10-26 | 2011-04-29 | Renault Sa | Axial lock washer for locking idle pinion on gear box shaft of automobile, has two semi rings supported together by hooping body, and locking ends of semi ring provided with pins that are arranged on circumferential part of semi ring |
US8894350B2 (en) * | 2010-11-02 | 2014-11-25 | Baker Hughes Incorporated | Reduced profile abrasion resistant pump thrust bearing |
US9353752B2 (en) * | 2013-07-19 | 2016-05-31 | Baker Hughes Incorporated | Compliant abrasion resistant bearings for a submersible well pump |
US20160201444A1 (en) * | 2013-09-19 | 2016-07-14 | Halliburton Energy Services, Inc. | Downhole gas compression separator assembly |
CA2874009C (en) * | 2013-12-10 | 2016-11-29 | Baker Hughes Incorporated | Spherical sleeve and bushing bearing for centrifugal pump stage |
US9829001B2 (en) * | 2014-10-23 | 2017-11-28 | Summit Esp, Llc | Electric submersible pump assembly bearing |
MX2017013567A (en) * | 2015-05-29 | 2018-02-09 | Halliburton Energy Services Inc | Electric submersible pump. |
US9816519B2 (en) * | 2015-12-03 | 2017-11-14 | Summit Esp, Llc | Press-fit bearing locking system, apparatus and method |
WO2018204005A1 (en) * | 2017-05-02 | 2018-11-08 | Halliburton Energy Services, Inc. | Retaining ring anti-migration system and method |
US10107079B1 (en) * | 2017-10-25 | 2018-10-23 | Summit Esp, Llc | Electric submersible motor thrust bearing system |
-
2018
- 2018-07-19 US US16/040,487 patent/US20190024665A1/en not_active Abandoned
- 2018-07-20 EP EP18836077.0A patent/EP3655659A4/en not_active Withdrawn
- 2018-07-20 WO PCT/US2018/043079 patent/WO2019018760A1/en unknown
- 2018-07-20 BR BR112020001126-6A patent/BR112020001126A2/en not_active Application Discontinuation
- 2018-07-20 CA CA3070491A patent/CA3070491C/en not_active Expired - Fee Related
- 2018-07-20 AR ARP180102045A patent/AR112711A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
BR112020001126A2 (en) | 2020-07-21 |
WO2019018760A1 (en) | 2019-01-24 |
US20190024665A1 (en) | 2019-01-24 |
CA3070491C (en) | 2021-01-12 |
EP3655659A4 (en) | 2021-04-21 |
AR112711A1 (en) | 2019-12-04 |
CA3070491A1 (en) | 2019-01-24 |
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Ipc: F04D 13/10 20060101AFI20210312BHEP Ipc: F04D 1/06 20060101ALI20210312BHEP Ipc: F04D 29/04 20060101ALI20210312BHEP Ipc: F04D 29/62 20060101ALI20210312BHEP Ipc: E21B 43/12 20060101ALI20210312BHEP Ipc: F04D 29/044 20060101ALI20210312BHEP Ipc: F04D 29/041 20060101ALI20210312BHEP Ipc: F04D 29/043 20060101ALI20210312BHEP |
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18D | Application deemed to be withdrawn |
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