EP3655659A1 - Adaptateur de conversion d'arbre de système de pompage - Google Patents

Adaptateur de conversion d'arbre de système de pompage

Info

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Withdrawn
Application number
EP18836077.0A
Other languages
German (de)
English (en)
Other versions
EP3655659A4 (fr
Inventor
Joseph ASHURST
Andrew Roberts
Blair ELLINGTON
Matthew SCHOELEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes ESP Inc
Original Assignee
GE Oil and Gas ESP Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GE Oil and Gas ESP Inc filed Critical GE Oil and Gas ESP Inc
Publication of EP3655659A1 publication Critical patent/EP3655659A1/fr
Publication of EP3655659A4 publication Critical patent/EP3655659A4/fr
Withdrawn legal-status Critical Current

Links

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

Pompe destinée à être utilisée dans un système de pompage motorisé comportant un arbre de pompe ayant une rainure annulaire inférieure et une rainure annulaire supérieure. La pompe comprend également un adaptateur inférieur et un adaptateur supérieur. L'adaptateur inférieur comporte une paire de moitiés annulaires inférieures conçues pour s'ajuster dans la rainure annulaire inférieure et l'adaptateur supérieur comporte une paire de moitiés annulaires supérieures conçues pour s'ajuster dans la rainure annulaire supérieure. La pompe comprend en outre une pluralité d'étages qui ont chacun un diffuseur fixe et une roue rotative. Les roues rotatives sont reliées à l'arbre par une liaison clavetée qui permet à la roue de se déplacer axialement le long de l'arbre. L'invention concerne également un procédé de conversion d'un arbre de compression en un arbre de flotteur qui comprend les étapes consistant à placer un adaptateur supérieur dans la rainure annulaire supérieure, à placer une ou plusieurs roues sur l'arbre, à placer un ou plusieurs éléments d'espacement standard sur l'arbre et à placer un adaptateur inférieur dans la rainure annulaire inférieure.
EP18836077.0A 2017-07-20 2018-07-20 Adaptateur de conversion d'arbre de système de pompage Withdrawn EP3655659A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762535224P 2017-07-20 2017-07-20
PCT/US2018/043079 WO2019018760A1 (fr) 2017-07-20 2018-07-20 Adaptateur de conversion d'arbre de système de pompage

Publications (2)

Publication Number Publication Date
EP3655659A1 true EP3655659A1 (fr) 2020-05-27
EP3655659A4 EP3655659A4 (fr) 2021-04-21

Family

ID=65015608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18836077.0A Withdrawn EP3655659A4 (fr) 2017-07-20 2018-07-20 Adaptateur de conversion d'arbre de système de pompage

Country Status (6)

Country Link
US (1) US20190024665A1 (fr)
EP (1) EP3655659A4 (fr)
AR (1) AR112711A1 (fr)
BR (1) BR112020001126A2 (fr)
CA (1) CA3070491C (fr)
WO (1) WO2019018760A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7267181B2 (ja) * 2019-12-05 2023-05-01 三菱重工業株式会社 原油採掘ポンプ

Family Cites Families (17)

* Cited by examiner, † Cited by third party
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 (ja) * 2004-07-16 2011-02-16 株式会社荏原製作所 遠心式ポンプ
US7575413B2 (en) * 2005-03-11 2009-08-18 Baker Hughes Incorporated Abrasion resistant pump thrust bearing
CN2866904Y (zh) * 2005-10-09 2007-02-07 天津市油田采油成套设备有限公司 增压注水电潜泵
RU2330187C1 (ru) * 2006-10-30 2008-07-27 Шлюмбергер Текнолоджи Б.В. (Schlumberger Technology B.V.) Погружной электрический насос
FR2951790A1 (fr) * 2009-10-26 2011-04-29 Renault Sa Rondelle d'arret axial d'un pignon sur un arbre, notamment sur un arbre de boite de vitesses
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 (fr) * 2013-12-10 2016-11-29 Baker Hughes Incorporated Palier a bague et manchon spherique pour etage de pompe centrifuge
US9829001B2 (en) * 2014-10-23 2017-11-28 Summit Esp, Llc Electric submersible pump assembly bearing
MX2017013567A (es) * 2015-05-29 2018-02-09 Halliburton Energy Services Inc Bomba sumergible electrica.
US9816519B2 (en) * 2015-12-03 2017-11-14 Summit Esp, Llc Press-fit bearing locking system, apparatus and method
CA3054949C (fr) * 2017-05-02 2022-02-22 Halliburton Energy Services, Inc. Systeme et procede anti-migration d'anneau de retenue
US10107079B1 (en) * 2017-10-25 2018-10-23 Summit Esp, Llc Electric submersible motor thrust bearing system

Also Published As

Publication number Publication date
AR112711A1 (es) 2019-12-04
EP3655659A4 (fr) 2021-04-21
WO2019018760A1 (fr) 2019-01-24
CA3070491C (fr) 2021-01-12
US20190024665A1 (en) 2019-01-24
CA3070491A1 (fr) 2019-01-24
BR112020001126A2 (pt) 2020-07-21

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