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WO2025213169A1 - Support de sac protecteur d'esp et protecteur de purge de gaz pour application à faible angle - Google Patents

Support de sac protecteur d'esp et protecteur de purge de gaz pour application à faible angle

Info

Publication number
WO2025213169A1
WO2025213169A1 PCT/US2025/023447 US2025023447W WO2025213169A1 WO 2025213169 A1 WO2025213169 A1 WO 2025213169A1 US 2025023447 W US2025023447 W US 2025023447W WO 2025213169 A1 WO2025213169 A1 WO 2025213169A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
support
bag support
esp
housing
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.)
Pending
Application number
PCT/US2025/023447
Other languages
English (en)
Inventor
Arthur I. Watson
Jignesh VADHIYA
Jose Angel CARIDAD URENA
Aliasgar Saifuddin CONTRACTOR
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.)
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Technology Corp
Original Assignee
Schlumberger Canada Ltd
Services Petroliers Schlumberger SA
Schlumberger Technology BV
Schlumberger Technology Corp
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 Schlumberger Canada Ltd, Services Petroliers Schlumberger SA, Schlumberger Technology BV, Schlumberger Technology Corp filed Critical Schlumberger Canada Ltd
Publication of WO2025213169A1 publication Critical patent/WO2025213169A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • 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
    • 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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning

Definitions

  • Electric submersible pump (ESP) protectors commonly employ redundant layers of compensation for motor oil thermal expansion and contraction, each layer comprising one or two bags for volume compensation, a shaft seal, and a relief valve to discharge excess oil during initial thermal expansion.
  • Relief valves are prone to leakage in well fluids containing sludge or solids.
  • the sealing force in relief valves is proportional to the cracking pressure, so recent efforts to improve reliability involve increasing the cracking pressure, which the bag must withstand.
  • Recent innovations in hydraulic logic have also increased the number of relief valves acting on a single bag.
  • the added pressure differential on a bag can cause the elastomer to creep and fail.
  • the current application comprises methods and devices for fully supporting the outer surface of a bag to withstand significantly higher pressure differential in the same way that a vehicle tire and rim support an innertube against much higher pressure than the innertube alone could withstand.
  • Figure 1 shows a schematic of an ESP according to some embodiments.
  • elastomer bags may be utilized in electric submersible pump (ESP) protectors (e.g., seal sections) for accommodating thermal expansion and contraction of the motor oil during thermal cycles.
  • Elastomer bags are designed to be flexible and durable, allowing them to accommodate the thermal expansion and contraction of motor oil during the varying temperature cycles experienced in well operations.
  • These bags may be made from high- performance elastomers that can withstand harsh well conditions, including exposure to aggressive chemicals and high temperatures. The design of the elastomer bags may ensure that they can expand and contract without losing their structural integrity, providing reliable performance over extended periods.
  • an orthogonal protector may comprise 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 intervening relief valves, in series or parallel, to provide redundancy.
  • the orthogonal protector is designed to enhance the reliability and performance of ESP systems by incorporating multiple relief valves that act in series or parallel to manage pressure differentials. This design ensures that even if one valve fails, others can maintain the necessary pressure balance, preventing damage to the elastomer bags and other components.
  • the pressure compensator 374 may be in the form of multiple metal bellows arranged around the shaft 368 like bullets in a revolver.
  • the structure of pressure compensator/metal bellows 374 provides high reliability and may provide greater displacement per unit length than can be achieved with parallel arrangements of metal bellows.
  • embodiments described herein may utilize a single, serial, and/or parallel arrangement of metal bellows pressure compensators 374. If elastomer bags are used as pressure compensators 374, a series arrangement can be helpful in various applications.
  • one side of the bellows 374 communicates with the motor 324 via a communication passage 382.
  • the other side of bellows 374 e.g. the outside of bellows 374 within chamber 372, communicates to the wellbore 328 via a passage 384 extending to a pressure port 386 located along the exterior of compensator 356.
  • the compensator 356 and its internal pressure compensator/bellows 374 breathes to the wellbore 328 and not through the shaft seal module 360.
  • the pressure compensation between the internal fluid of submersible motor 324 and the external well fluid in the annulus surrounding pumping system 320 is achieved directly by the compensator 356 rather than through the shaft seal module 360.
  • the submersible motor 324 communicates with the interior 380 of the bellows 374 between the inner bellows portion 376 and outer bellows portion 378 via passage 382, and the wellbore 328 communicates with the exterior of the bellows 374 within a chamber 372 via passage 384.
  • the pressure compensator, e.g. bellows, 374 may be located between an upper body 388 and a lower body 390 of compensator 356.
  • the upper body 388 and the lower body 390 may be connected by an outer housing 392 which forms interior chamber or chambers 372 in cooperation with upper body 388, lower body 390, and shaft tube 370.
  • the bellows 374 may be suspended from the upper body 388.
  • bubbles can vent from the bellows 374 through a relief valve 394 disposed along a relief flow path 395.
  • the relief flow path 395 may be oriented so the bubbles can vent through the shaft seal module 360. Such venting may occur during oil filling and in the event gas is liberated from the oil during operation.
  • SSM 360 may prevent well fluids from entering the motor and protect the motor oil from contamination.
  • the SSM 360 may include one or more mechanical seals and/or labyrinth seals that create a barrier against fluid ingress.
  • the SSM 360 may be located between the motor and the pump and ensure that the motor remains uncontaminated by well fluids.
  • the SSM 360 may interact with the motor and housing to maintain the integrity of the ESP system.
  • the inboard upper bag support 520 is loosely assembled over the neck of the bag.
  • the clamp is then installed outboard of the inboard upper bag support 520.
  • the O-ring is installed in the groove in the OD of the lower bag support 526.
  • the lower bag frame 528 is then installed in the lower body 516 (the body immediately below the subject bag), so that the lower bag support 526 is prevented from moving farther downward than design by contact with the lower body 516 or with another component if present, such as a relief valve mounting ring 514. Any fasteners for the lower bag frame 528 as mentioned above are installed at this time.
  • the housing 506 is then installed and threaded to the lower body 516.
  • the O-ring is installed in the groove in the OD of the outboard upper bag support.
  • the inboard upper bag support 520 is rotated for alignment of the screw holes and the recess for the bag clamp buckle in the outboard upper bag support.
  • the outboard upper bag support is then installed and fastened with screws. Note that the shoulder in the ID of the housing 506 prevents the outboard upper bag support from moving farther downward.
  • Any of the components in the form of a ring may be divided into segments of a circle that join together to form a complete circle, enabling radial assembly of the component over the bag or bag frame.
  • Segments of circles may be joined by fasteners, e.g. tangential screws, pins, clips.
  • Segments of circles may be retained together by a close fit in the housing 506, by a retainer ring, an outer sleeve, wire, or other part.
  • the outboard upper bag support or part of similar function may comprise multiple pieces that do not form a full circle, e.g. gaps remain between them after assembly.
  • the outboard upper bag support 518 may be joined to the inboard upper bag support 520 by other means, including pins, threading, clips, wire, expanding fasteners, interference fit, crimping, swaging, etc.
  • any of the bag support components may be retained from moving upward, downward, or rotationally by trapping an inward projection between neighboring parts.
  • a neighboring part may be a component or element that is adjacent to or in close proximity to another specified component within the ESP system. Trapping may comprise securing or holding in place by surrounding components or structures, resisting movement or displacement.
  • the lower bag support 526 may comprise a portion smaller in ID than the lower bag frame 528 OD.
  • the portion smaller in internal diameter may be trapped between the lower bag frame and the lower body or the lower bag frame and the relief valve mounting ring.
  • the upper bag support may comprise a portion smaller in ID than the upper bag frame 522 OD.
  • the portion smaller in diameter may be trapped between the upper bag frame and the upper body or the upper bag frame and a retainer ring.
  • the volume between the inner bellows and the shaft tube 524 is vented by a circle of holes that ensures one hole with be on the upper side to vent gas.
  • the angular orientation of the vent hole through the upper body likewise may determine the size of the gas trap, unless the threads are timed or multiple holes are provided.
  • a timed thread may refer to a threaded connection where the orientation of the thread is controlled 1 so that, when the connection is fully torqued, certain features — like ports, slots, keyways, or alignment holes — are in the correct position relative to other components.
  • the relief valve orientation likewise may determine the size of the gas trap unless the threads are timed.
  • the current application comprises features and methods for fully supporting the external surface of an ESP protector bag to prevent it from creeping, over-expanding, and rupturing due to higher differential pressure induced by a greater number of intervening relief valves of higher cracking pressure.
  • the bag support supports the entire external surface of bag that is not otherwise covered by the housing 506, bag frame, shaft tube 524, and clamps. The exceptions are:
  • gaps and holes are sized sufficiently large to permit free flow of fluids and solids into and out of the space around the bag as it contracts 510 and expands 508.
  • the gaps and holes are sized sufficiently small to prevent extrusion or creep of the elastomer bag at the maximum pressure differential for the required life of the ESP at its service temperature and chemical exposure. Pressure capacity may be increased as required by reducing the size but increasing the number of such gaps and holes, the limiting case being a bag support constructed of fine metal mesh.
  • the gaps are also sized to accommodate accumulation of manufacturing tolerances to prevent excessive gaps or unwanted interference between parts.
  • FIG. 6 a cross-sectional view of a portion of the electric submersible pumping system 22 is provided to illustrate an example of the thrust bearing section 28 combined with a gas purging system 56.
  • the gas purging system 56 comprises features which operate to remove gas from the thrust bearing section 28 which could otherwise cause wear or even failure of the thrust bearing section 28.
  • the gas purging system 56 may be used to remove gas from other portions of electric submersible pumping system 22 or from other well string components.
  • thrust bearing section 28 During operation of submersible pump 24, the thrust of the submersible pump 24 is transferred through shaft 64 and countered via thrust bearing section 28.
  • the thrust runner 58 rotates with shaft 64 and is forced axially against thrust bearing 60 to counter down thrust or against thrust bearing 62 to counter up thrust.
  • a motor oil 68 may move between submersible motor 26 and thrust bearing section 28 via, for example, a flow passage 70 extending through a bulkhead 72.
  • the bulkhead 72 as well as thrust bearing section 28 may be disposed within sections of an outer housing 74.
  • a small gap 76 may be disposed between thrust runner 58 and the surrounding outer housing 74 to enable rotation of thrust runner 58 within outer housing 74.
  • the gas 78 may be contained within a gassy oil portion of the motor oil 68.
  • the centrifugal action of thrust runner 58 may cause formation of a lighter weight, mixed ratio oil containing gas 78.
  • the lighter weight oil containing gas 78 moves to radially inward region 80 while the heavier motor oil 68 (containing no gas or reduced gas) moves radially outward relative to region 80.
  • the gas purging system 56 is able to remove gas 78 by removing the lighter weight mixed ratio oil from radially inward region 80.
  • the centrifugal action results when thrust runner 58 rotates relative to stationary thrust bearings 60/62 which may be rotationally fixed with respect to outer housing 74 via a variety of mounting structures 82.
  • gas purging system 56 utilizes shaft 64 in combination with a gas pumping feature 84 to move gas 78 away from the radially inward region 80 proximate thrust runner 58.
  • the gas pumping feature 84 may comprise a groove 86 disposed along an exterior (or interior) of shaft 64.
  • the groove 86 operates during rotation of shaft 64 to move gas 78 from region 80 to, for example, a sump chamber 88.
  • the groove 86 may be a helical groove milled or otherwise formed along an exterior of shaft 64 so as to create the desired gas pumping action during rotation of shaft 64.
  • the helical groove 86 works as a screw pump which moves the gas 78 (e.g. gas 78 contained in gassy oil) along the shaft 64 to sump chamber 88.
  • the groove 86 may extend at least partially through thrust runner 58 and along an exterior surface of shaft 64 or along the interior of shaft 64.
  • Various gaps may be formed along rings, radial bearings, and other features disposed along shaft 64 to ensure the flow of gas 78 from the desired region, e g. radially inward region 80, to sump chamber 88.
  • the sump chamber 88 of gas purging system 56 may be positioned to receive the gas 78 from pumping feature 84 via a diffuser 90, e.g. a radial opening or openings 92, formed through shaft tube 66.
  • the sump chamber 88 may be formed between shaft tube 66 and a surrounding section of outer housing 74.
  • the diffuser 90 is constructed with radial openings 92 arranged at an angle which positively directs the gas 78 away from the shaft 64.
  • the diffuser 90 also may have vanes or other features attached to the shaft tube 66 which curve from a generally circumferential orientation to a generally radial orientation.
  • the diffuser 90 may have helical passages arranged with respect to shaft 64 to change the direction of flow from generally axial to generally radial.
  • the groove 86 also may be reversed in orientation or combined with other features downstream of diffuser 90 to limit the amount of gas, e g. bubbles, flowing past the diffuser 90.
  • the gas purging system 56 also comprises a body section 94 disposed between the sump chamber 88 and the thrust runner 58.
  • the body section 94 may comprise a plurality of passages 96 in the form of recirculation passages oriented at a desired angle relative to shaft 64.
  • the recirculation passages 96 may be oriented through body section 94 such that ends of the passages 96 proximate sump chamber 88 are at a radially inward position while ends of the passages 96 proximate thrust bearing section 28 are at a radially outward position as illustrated.
  • gas 78 contained within a gassy oil is moved from region 98, along the upper recirculation passages 96, and into sump chamber 88 as indicated by circulation arrows 100. This pumping action along recirculation passages 96 further facilitates removal of gas 78 from thrust bearing section 28.
  • the gas purging system 56 and thrust bearing section 28 may be located adjacent to or within various components of electric submersible pumping system 22 and may comprise various other and/or additional features such as access ports 102 and radial bearing assemblies 104.
  • the ESP may comprise a thrust bearing chamber and a gas separation chamber above it that cooperate to pump gas via a spiral groove in the shaft from below the thrust runner up to the gas separation chamber and return relatively gas- free motor oil to the thrust bearing chamber.
  • FIG. 7 examples of additional features and components which may be included in gas purging system 56 are illustrated.
  • gas purging system 56 comprises at least one baffle 106 oriented generally radially between shaft tube 66 and the surrounding section of housing 74.
  • the at least one baffle 106 may comprise a plurality of baffles 106 having passages 108 therethrough to enable movement of fluid along sump chamber 88 while limiting fluid agitation.
  • gas 78 is better able to separate from motor oil 68 for collection along an upper region of the sump chamber 88 as illustrated.
  • FIG. 7 illustrates diffuser 90 as positioned at a distal end of sump chamber 88 relative to thrust bearing section 28.
  • the gas purging system 56 also may comprise other features such as a plurality of gas discharge passages 110 routed from the sump chamber 88 to a collection space 112 and then to a relief valve 114.
  • the gas discharge passages 110 and relief valve 114 cooperate to discharge gas from sump chamber 88 to, for example, annulus 50 surrounding the electric submersible pumping system 22.
  • the relief valve 114 may be selected so as to crack or shift to an open flow position when the pressure of gas 78 acting on relief valve 114 reaches a predetermined cracking pressure.
  • a plurality of relief valves 114 may be positioned to ensure at least one of the relief valves 1 14 is positioned toward a top side regardless of the orientation of the electric submersible pumping system 22.
  • the gas retained in the separation chamber is vented through the upper body (the body above the chamber) through a circular pattern of vent holes.
  • the holes are very small in diameter so that gas will preferentially flow to the relief valve regardless of the relief valve’s rotational orientation.
  • FIG. 8 another example of an ESP 44 oriented at a predetermined angle of rotation for use is illustrated.
  • ESP 44 is positioned in a capsule 116 having an inflow conduit 12 for receiving a production fluid 10 to be energized by the ESP and discharged through a discharge conduit 14 of the ESP 44.
  • receiving structure 112 may be located on a surface 28 such as a seabed, the inflow conduit 12 connected for example to a subsea wellbore whereby ESP 44 is utilized as a booster pump for producing fluid 10 to the surface of the water.
  • the present disclosure involves gravity separation of fluids in an ESP 44 installed at a low angle 58 (i.e., an angle of less than about 30 degrees from horizontal or more than about 60 degrees from vertical 60).
  • a low angle 58 i.e., an angle of less than about 30 degrees from horizontal or more than about 60 degrees from vertical 60.
  • the least permissible angle of operation with respect to the earth is minimized by combination with other aspects of the disclosure to an angle of greater than about 60 degrees from vertical and greater than about 0 degrees from horizontal.
  • This type of chamber may not normally be under consideration for non-vertical application.
  • a low angle system for extending the function of a labyrinth to greater deviation from vertical may be utilized. This is achieved by rotational orientation of the standing and hanging tubes in relation to the earth.
  • Several methods of doing this are disclosed, the more practical for subsea skid protectors being timing of the threads on the bodies to advantageously orient tubes, a cumbersome and costly method.
  • FIG. 9 as the angle from vertical increases, the bag can form a larger gas trap. This is due to the following issues, the most restrictive of which governs the size of the gas trapped in the bag.
  • the end In order for the bag to collapse properly, the end is molded smaller in diameter than the main body, creating a gas trap in a near horizontal application. With larger diameter bags, in order to remove it from the mold one end is usually much larger than the other. To facilitate assembly, the smaller end is generally oriented upward, creating a bottle neck that amplifies the gas trap.
  • the vent from the bag to the passageway through the upper body is generally a one or two holes that are randomly angularly located unless the ESP is installed in a seabed skid and the threads are timed to orient the hole on the upper side.
  • the relief valve 512 for the bag is also installed in the body that is randomly angularly oriented except with thread timing in a skid. Multiple relief valves may not be used in the same way as multiple vent holes because one may unpredictably open first. Furthermore, multiple relief valves may increase potential for leakage.
  • annular bellows may not function optimally.
  • Annular metal bellows may be installed with the annular opening facing downward to form an absolute gas trap.
  • a bubble deflector at the opening can prevent some bubbles from entering in vertical installations, but any that do enter become trapped in the bellows. This has been greatly improved in recent designs with the annular opening facing upward.
  • a GPS for an ESP system is designed to work at any angle of installation without control of the angle of rotation. It may be used in steam-assisted gravity drainage (SAGD) nearhorizontal wells.
  • SAGD steam-assisted gravity drainage
  • the upper flange of the bellows features a circle of multiple holes at a radius near the minor diameter of the outer bellows ensuring that one hole will be on the upper side to effectively vent gas without rotationally orienting it.
  • the normal orientation of the bag may be reversed so that the larger end is upward, enabling venting almost all of the gas from the bag.
  • the ESP may provide multiple vent holes 1208 (e g., a circle of multiple vents, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, here and elsewhere) through the upper bag frame 522 adjacent or near to the inner diameter of the end of the bag to ensure that at least one hole will be on the upper side, thus enabling gas to be vented in any rotational orientation of the upper bag frame 522.
  • the ESP may provide a circle of multiple vent holes 1208 through the upper body 504 at a radius that at the angle of installation would not be materially lower than the inner diameter of the upper end of the bag 1210 or than the uppermost vent hole in the upper bag frame 522.
  • the ESP may provide another circle of holes to vent gas from internal feature of the body, such as the regions around the shaft seal 530 and the radial bearing. These measures obviate the need for timing threads to vent the upper body 504.
  • the relief valve 512 in a separate mounting ring that is assembled to the upper body 504 after the upper body 504 has already been screwed into the housing 506 (See FIG. 5).
  • the rotational orientation of the mounting ring to the upper body 504 may be variable to enable the relief valve to be oriented on what will be the upper side of the ESP when it is later installed in a skid or other orientable installation.
  • the mounting ring is sealingly fixed to the upper body 504 with O-rings and a circular pattern of screws that can be indexed to position the relief valve on the upper side.
  • Another means is a pin in one part that engages one of a circle of holes in the other part. Another means is a tight diametral fit.
  • the entrance to the relief valve may be located at a radius that at the angle of installation will not be materially lower than the inner diameter of the upper end of the bag or of the uppermost vent hole in the upper body 504. This avoids the need to time threads to avoid creating a gas trap.
  • the relief valve may be assembled directly into one of several ports in the upper body 504.
  • the port that may be uppermost when installed in the skid or other orientable installation is selected after screwing the upper body 504 into the housing 506.
  • the unused holes may be plugged.
  • the ports may be in a circular, rectangular, square, triangular, linear, arced, and/or hyperbolic pattern and communicate with the vent holes in the upper body 504.
  • timing of the threads may be used to orient the relief valve on the upper side to positively vent the bellows and prevent creation of a substantial gas trap in the bellows.
  • the current application removes the need to time the threads.
  • the relief valve may be mounted in a mounting ring.
  • the relief valve may be assembled into the port in the upper body 504 that will be uppermost, and the other ports are plugged.
  • connection As used herein, the terms “connect”, “connection”, “connected”, “in connection with”, and “connecting” are used to mean “in direct connection with” or “in connection with via one or more elements”; and the term “set” is used to mean “one element” or “more than one element”. Further, the terms “couple”, “coupling”, “coupled”, “coupled together”, and “coupled with” are used to mean “directly coupled together” or “coupled together via one or more elements”. As used herein, the terms “up” and “down”; “upper” and “lower”; “top” and “bottom”; and other like terms indicating relative positions to a given point or element are utilized to more clearly describe some elements.
  • these terms relate to a reference point at the surface from which drilling operations are initiated as being the top point and the total depth being the lowest point, wherein the well (e.g., wellbore, borehole) is vertical, horizontal or slanted relative to the surface.
  • the well e.g., wellbore, borehole
  • the terms “generally parallel” and “substantially parallel” or “generally perpendicular” and “substantially perpendicular” refer to a value, amount, or characteristic that departs from exactly parallel or perpendicular, respectively, by less than or equal to 15 degrees, 10 degrees, 5 degrees, 3 degrees, 1 degree, or 0.1 degree.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe submersible électrique (ESP). L'ESP peut comprendre un cadre de sac comprenant un cadre de sac supérieur et un cadre de sac inférieur. L'ESP peut comprendre un sac. L'ESP peut comprendre un carter. L'ESP peut comprendre un tube. L'ESP peut comprendre une pince. L'ESP peut comprendre un support de sac doté d'un support de sac inférieur et d'un support de sac supérieur. Le support de sac peut supporter une surface externe du sac qui n'est pas couverte par le boîtier, le cadre de sac, le tube et les pinces. Le support de sac inférieur peut comprendre une bague complète unique qui supporte le sac de la pince au carter.
PCT/US2025/023447 2024-04-05 2025-04-07 Support de sac protecteur d'esp et protecteur de purge de gaz pour application à faible angle Pending WO2025213169A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202411028345 2024-04-05
IN202411028345 2024-04-05

Publications (1)

Publication Number Publication Date
WO2025213169A1 true WO2025213169A1 (fr) 2025-10-09

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ID=97268206

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2025/023447 Pending WO2025213169A1 (fr) 2024-04-05 2025-04-07 Support de sac protecteur d'esp et protecteur de purge de gaz pour application à faible angle

Country Status (1)

Country Link
WO (1) WO2025213169A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6378915B1 (en) * 1998-08-24 2002-04-30 Plasson Ltd. Pipe coupling
CN202737636U (zh) * 2012-08-01 2013-02-13 中国石油天然气集团公司 防吸破胶囊潜油电机保护器
US20190153831A1 (en) * 2017-11-20 2019-05-23 Dmytro KHACHATUROV Linear electric submersible pump unit
US20200116000A1 (en) * 2017-07-25 2020-04-16 Halliburton Energy Services, Inc. Elastomeric seal bag protector
CN113187738A (zh) * 2021-06-01 2021-07-30 天津市百利溢通电泵有限公司 一种环保型无泄漏潜油电机保护器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6378915B1 (en) * 1998-08-24 2002-04-30 Plasson Ltd. Pipe coupling
CN202737636U (zh) * 2012-08-01 2013-02-13 中国石油天然气集团公司 防吸破胶囊潜油电机保护器
US20200116000A1 (en) * 2017-07-25 2020-04-16 Halliburton Energy Services, Inc. Elastomeric seal bag protector
US20190153831A1 (en) * 2017-11-20 2019-05-23 Dmytro KHACHATUROV Linear electric submersible pump unit
CN113187738A (zh) * 2021-06-01 2021-07-30 天津市百利溢通电泵有限公司 一种环保型无泄漏潜油电机保护器

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