WO2024086082A1 - Joint d'étanchéité élastomère - Google Patents

Joint d'étanchéité élastomère Download PDF

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Publication number
WO2024086082A1
WO2024086082A1 PCT/US2023/035171 US2023035171W WO2024086082A1 WO 2024086082 A1 WO2024086082 A1 WO 2024086082A1 US 2023035171 W US2023035171 W US 2023035171W WO 2024086082 A1 WO2024086082 A1 WO 2024086082A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
downhole
sealing system
ring
sleeve
Prior art date
Application number
PCT/US2023/035171
Other languages
English (en)
Inventor
David GOMEZ-RAMIREZ
Weiming Lan
Original Assignee
Schlumberger Technology Corporation
Schlumberger Canada Limited
Services Petroliers Schlumberger
Schlumberger Technology B.V.
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 Technology Corporation, Schlumberger Canada Limited, Services Petroliers Schlumberger, Schlumberger Technology B.V. filed Critical Schlumberger Technology Corporation
Publication of WO2024086082A1 publication Critical patent/WO2024086082A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/128—Packers; Plugs with a member expanded radially by axial pressure

Definitions

  • the present disclosure generally relates to elastomer seals, for example for use in oil and gas well completions, and more particularly to diamond elastomer seals for use with chevron stacks.
  • chevron seal assemblies or seal stacks can be used to seal between, e.g., radially between, concentric, generally cylindrical walls, such as concentric sliding sleeves.
  • Such chevron seal assemblies include a plurality of stacked chevron-shaped seal elements.
  • a downhole sealing system includes two seal stacks and an elastomer ring.
  • Each seal stack includes a plurality of sealing elements.
  • the elastomeric ring is disposed axially between the two seal stacks and has a diamond cross-sectional shape.
  • the elastomeric ring is configured to provide a gas seal to the downhole sealing system.
  • a downhole tool includes a first sleeve, a second sleeve configured to move axially relative to the first sleeve, and a downhole sealing system disposed between the first sealing sleeve and the second sealing sleeve and including two seal stacks and an elastomer ring.
  • Each seal stack includes a plurality of sealing elements.
  • the elastomeric ring is disposed axially between the two seal stacks and has a diamond cross-sectional shape. The elastomeric ring is configured to provide a gas seal to the downhole sealing system.
  • a method of sealing a downhole tool includes positioning a first sleave of the downhole tool proximate a second sleeve of the downhole tool, wherein the second sleeve is axially movable relative to the first sleeve.
  • the method further includes positioning a downhole sealing system comprising two seal stacks and an elastomeric ring disposed axially between the two seal stacks and ring having a diamond cross-sectional shape between the first sleeve and the second sleeve to provide a gas seal to the downhole tool.
  • Figure 1 illustrates a cross-section of an example chevron seal stack.
  • Figure 2 illustrates an example sliding sleeve assembly including chevron seal stacks.
  • Figure 3 illustrates a cross-sectional view of an example seal according to the present disclosure.
  • Figure 4A shows a seal according to the present disclosure undergoing deformation as in use.
  • Figure 4B shows a prior art seal undergoing deformation as in use.
  • Figure 5 illustrates a cross-sectional view of another example seal according to the present disclosure.
  • Figure 6A illustrates a cross-sectional view of an example elastomer ring according to the present disclosure.
  • Figure 6B shows the elastomer ring of Figure 6A installed in a seal.
  • 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
  • Chevron seal stacks 100 include a plurality of stacked, chevron-shaped or V-shaped seal elements, for example as shown in Figure 1.
  • the seal elements are made of or include a polymer, such as a plastic.
  • Such seals are often used to seal between sliding sleeves 102, 104 in downhole components in oil and gas wells, for example as shown in Figure 2.
  • a chevron seal stack 200 can include two traditional chevron stacks 204, each including a plurality of chevron-shaped seal elements or V-rings 202, and a diamond-shaped elastomer ring 210 positioned between, e.g., axially between, the two stacks 204.
  • An elastomer ring 210 according to the present disclosure can have an elongated diamond shaped cross-section, for example as shown in Figure 6A, which may acquire a pseudo-hexagonal cross-section when installed, for example as shown in Figure 6B.
  • the interference between the elastomer ring 210 and the gland makes the Chevron stacks gas tight.
  • the elastomer ring 210 is designed to match or fit into the chevron or V-ring cavity, which prevents or inhibits rotation of the elastomer ring 210 and effectively energizes the chevron stacks 204.
  • the diamond shape of the elastomer ring 210 also advantageously allows for optimization of the contact patch with the gland to maximize sealability while minimizing friction.
  • the design of seals according to the present disclosure does not affect the pressure relief functionality of the traditional chevron stack 204.
  • the design can be optimized to allow the sealing elements 202 to relieve back pressure, resulting in improved friction.
  • the shape of the diamond-shaped elastomer ring 210 also prevents or inhibits rotation by engaging with the polymer chevron or v-ring cavity shape formed by the sealing elements 202.
  • the design also allows for optimization of the contact patch by adjusting the angles and fdlets of the diamond shape, which allows for a better control of friction and sealability.
  • Figure 4A shows a seal 200 including a diamond-shaped elastomer ring 210 according to the present disclosure undergoing deformation as in use, compared to a chevron stack 204 including an elastomeric V-ring 202b undergoing deformation as in use in Figure 4B.
  • V-rings 202a are made of or include polytetrafluoroethylene (PTFE).
  • the illustrated seals also include polyether ether ketone (PEEK) rings 203.
  • PEEK polyether ether ketone
  • the design of Figure 4B produces higher strains than that of Figure 4A per finite element analysis (FEA) calculations.
  • the present design for example as shown in Figure 4A, achieves higher initial contact pressures with lower strains on the elastomer (making the elastomer less likely to break) and with a smaller contact patch (leading to lower friction).
  • Chevron seals 200 including a diamond-shaped elastomer ring 210 according to the present disclosure can be particularly well suited for, for example, intelligent completions, such as full-bore downhole flow control valves in gas wells.
  • Downhole flow control valves FCVs
  • FCVs Downhole flow control valves
  • Some existing FCVs operate hydraulically. Ingress of gases into the hydraulic chamber and hydraulic lines attached to FCVs downhole can compromise operation of the FCV and other downhole equipment.
  • Chevron seals 200 including elastomer rings 210 according to the present disclosure advantageously allow flow control valves to operate in gas wells, for example, for natural gas production or CO2 injection for carbon capture, with minimum gas leakage into their hydraulic chambers.
  • Chevron seals 200 can also be used in formation isolation valves (FIVs), safety valves (SVs), hydraulically set packers that are sensitive to gas ingress to the chamber, and/or other hydraulically actuated or other downhole completions equipment that requires a gas seal.
  • FOVs formation isolation valves
  • SVs safety valves
  • hydraulically set packers that are sensitive to gas ingress to the chamber
  • other hydraulically actuated or other downhole completions equipment that requires a gas seal.
  • a flow control valve including a chevron seal 200 with a diamond-shaped elastomer ring 210 successfully completed the equivalent of a lifecycle for the subject flow control valve with no observed damage and minimal leakage.
  • Figure 5 illustrates a simplified version of a seal according to the present disclosure.
  • the seal includes the central diamond-shaped elastomer ring 210 and a sealing element 202 in the form of a chevron sealing element or V-ring on either side.
  • the two sealing elements 202 act as supporting or backup rings to prevent or inhibit rotation of the central diamond-shaped elastomer ring 210.
  • the diamond-shaped elastomer ring 210 can also or alternatively be used with various other types of supporting or back-up members, such as metal spacers or PEEK backup rings.
  • one or more v-shaped backups ring or metal spacers may be used in place of or in addition to the sealing elements 202.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

Un système d'étanchéité de fond de trou peut comprendre deux empilements d'étanchéité et une bague élastomère. Chaque empilement d'étanchéité peut comprendre une pluralité d'éléments d'étanchéité. La bague élastomère peut être disposée axialement entre les deux empilements d'étanchéité et avoir une forme de section transversale en diamant. Le bague élastomère peut être conçue pour assurer une étanchéité aux gaz au système d'étanchéité de fond de trou.
PCT/US2023/035171 2022-10-18 2023-10-16 Joint d'étanchéité élastomère WO2024086082A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263379937P 2022-10-18 2022-10-18
US63/379,937 2022-10-18

Publications (1)

Publication Number Publication Date
WO2024086082A1 true WO2024086082A1 (fr) 2024-04-25

Family

ID=90738127

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2023/035171 WO2024086082A1 (fr) 2022-10-18 2023-10-16 Joint d'étanchéité élastomère

Country Status (1)

Country Link
WO (1) WO2024086082A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5309993A (en) * 1990-08-27 1994-05-10 Baker Hughes Incorporated Chevron seal for a well tool
US20070089887A1 (en) * 2005-10-24 2007-04-26 Baker Hughes Incorporated Metal-to-metal non-elastomeric seal stack
US20100219592A1 (en) * 2009-02-27 2010-09-02 Halliburton Energy Services, Inc. Sealing Array for High Temperature Applications
US20130087977A1 (en) * 2011-10-05 2013-04-11 Gary L. Galle Damage tolerant casing hanger seal
WO2021222496A1 (fr) * 2020-04-29 2021-11-04 Schlumberger Technology Corporation Ensemble d'étanchéité de fond de trou

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5309993A (en) * 1990-08-27 1994-05-10 Baker Hughes Incorporated Chevron seal for a well tool
US20070089887A1 (en) * 2005-10-24 2007-04-26 Baker Hughes Incorporated Metal-to-metal non-elastomeric seal stack
US20100219592A1 (en) * 2009-02-27 2010-09-02 Halliburton Energy Services, Inc. Sealing Array for High Temperature Applications
US20130087977A1 (en) * 2011-10-05 2013-04-11 Gary L. Galle Damage tolerant casing hanger seal
WO2021222496A1 (fr) * 2020-04-29 2021-11-04 Schlumberger Technology Corporation Ensemble d'étanchéité de fond de trou

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