WO2013025709A1 - Joint s - Google Patents

Joint s Download PDF

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Publication number
WO2013025709A1
WO2013025709A1 PCT/US2012/050782 US2012050782W WO2013025709A1 WO 2013025709 A1 WO2013025709 A1 WO 2013025709A1 US 2012050782 W US2012050782 W US 2012050782W WO 2013025709 A1 WO2013025709 A1 WO 2013025709A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
face
gland
groove
sealing
Prior art date
Application number
PCT/US2012/050782
Other languages
English (en)
Inventor
Brandon E. CARRINGER
Original Assignee
Cameron International Corporation
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 Cameron International Corporation filed Critical Cameron International Corporation
Publication of WO2013025709A1 publication Critical patent/WO2013025709A1/fr

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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/01—Sealings characterised by their shape

Definitions

  • Fluid systems such as oil and gas exploration, production, and transport systems, typically include multiple segments of tubing, valves, and connectors that are sealed together by various seals. These seals are often subjected to harsh environmental conditions, such as corrosive fluids, extreme pressures, and extreme temperatures. Moreover, seals are often disposed in remote equipment, such as a marine (e.g., subsea) wellhead, which can make access and repair difficult and expensive. In oil and gas applications, seals are typically constructed of a metal or an elastomer. Metal seals provide long-term resistance to well bore fluids, temperatures and pressures, but often rely on high installation forces and complicated design and geometry to provide reliable sealing.
  • Elastomeric seals typically have a simple design and can be installed with low installation forces. Further, elastomeric seals may provide a seal across imperfections (e.g., damage, concentricity and ovalities) on sealing surfaces, and have larger manufacturing tolerances, concentricity and ovality allowances. Elastomeric seals are generally formed from an elastomeric material that is designed for use in a particular environment.
  • S-seals are elastomeric seals that include over-molded coil springs.
  • traditional elastomeric seals such as O-rings may extrude resulting in loss of seal.
  • the over-molded coil springs of the S-seal resist extrusion. Consequently, S-seals may be preferred in applications involving extreme temperature and pressure.
  • the S-seal for sealing an annulus between a mandrel outer surface and a tubular inner surface.
  • the S-seal includes a ring comprising a seal face, a gland face, and opposing side faces.
  • the gland face is opposite the seal face.
  • the side faces extend between the seal face and the gland face.
  • a spring is embedded in the ring at each intersection of the seal face with one of the side faces.
  • Each side face comprises a groove disposed between the spring and an intersection of the gland face and the side face.
  • a system in another embodiment, includes a mandrel, a tubular, and an S- seal.
  • the tubular is disposed about the mandrel.
  • the S-seal includes a sealing face and side faces.
  • One of the mandrel and the tube includes a circumferential channel for retaining the S-seal.
  • the S-seal is disposed in the channel and seals an annulus between the mandrel and the tube.
  • the sealing face seals against one of the tube and the mandrel.
  • the side faces seal against the side walls of the channel.
  • a seal in yet another embodiment, includes an elastomeric body, metal springs, a first face, a second face, and side faces.
  • the metal springs are embedded in corners of the elastomeric body.
  • the first face extends between the outer corners having the embedded springs.
  • the second face is opposite the first face.
  • the side faces extend between the first face and the second face. Each side face is configured to seal to a gland wall on a radius of the spring.
  • Figure 1 shows a cross- sectional view of fluid system that includes an S-seal in accordance with various embodiments
  • Figures 2A-2C shows views of the S-seal in accordance with various embodiments
  • Figure 3 shows a cross section of the S-seal seated in a gland
  • Figures 4A-4C shows views of another embodiment of an S-seal.
  • the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to... .”
  • the term “couple” or “couples” is intended to mean either an indirect or direct connection. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices and connections.
  • the terms “axial” and “axially” generally mean along or parallel to a central axis (e.g., central axis of a body or a port), while the terms “radial” and “radially” generally mean perpendicular to the central axis.
  • an axial distance refers to a distance measured along or parallel to the central axis
  • a radial distance means a distance measured perpendicular to the central axis.
  • FIG. 1 shows a cross- sectional view of a fluid system 100 that includes an S-seal 106 in accordance with various embodiments.
  • the fluid system 100 also includes a mandrel 102 and tubing 104.
  • Embodiments of the fluid system 100 may be mineral extraction systems for the extraction of subterranean natural resources, such as oil and gas.
  • the tubing 104 may be a tubing spool coupled to a well head
  • the mandrel 102 may be tubing hanger that secures production tubing to the tubing spool for extraction of resources from subsurface formations 114 via a well 108.
  • the mandrel 102 and tubing may include any number of components, such as Christmas trees, casing hangers, casing heads, casing strings, tubing hangers, tubing heads, tubing strings, running tools, blowout preventers, valves, flanges, etc.
  • the S-seal 106 may be employed as a sealing element in such devices.
  • the mandrel 102 includes an annular channel or seal gland 110 formed in the outer face of the mandrel 102.
  • the S-seal 106 is disposed in the seal gland 110 and compressed between the mandrel 102 and the tubing 104 to seal the annulus 112.
  • the S-seal 106 may be subject to working pressures of up to 20,000 pounds per square inch (PSI) or more.
  • PSI pounds per square inch
  • the operating environment of such systems may include temperatures ranging from about -50° Fahrenheit (F) to over 400° F.
  • the S-seal is disposed in a seal gland formed in the inner surface of the tubing 104, rather than the seal gland 110 of the mandrel 102.
  • the various structural features of the S-seal are arranged differently than the features of the seal 106 as will be discussed below.
  • FIGS 2A-2C show views of the S-seal 106 in accordance with various embodiments.
  • the S-seal includes a ring-shaped body having a gland face 202 configured to be seated against the bottom surface 304 of the gland 110, and a seal face 204 configured to seal against an opposing surface (e.g., the inner surface of the tubing 104).
  • the side faces 206 of the S-seal 106 extend from the gland face 202 to the sealing face 204. In some embodiments, the side faces 206 are normal to at least one of the sealing face 204 and the gland face 202.
  • the body of the S-seal 106 is generally formed of an elastomer, such as nitrile, hydrogenated nitrile butadiene rubber (HNBR), polyether ether ketone (PEEK), thermoplastics, fluroelastomers, perfluroelastomers, perflurosilicons, etc. Selection of a particular elastomer may be based on the pressure,
  • Coil springs 208 are embedded in the body of the S-seal 106 at the intersection of the sealing face 204 with each side face 206.
  • the coil springs 208 inhibit extrusion of the elastomer when the S-seal 106 is exposed to extreme pressure and/or temperature.
  • the springs 208 may be formed of stainless steel or an alloy of nickel and chromium, such as an INCONEL alloy.
  • Embodiments of the S-seal 106 are configured to seal along the side walls 302 of the gland 110.
  • the side faces 206 are sealing faces.
  • Each of the side faces 206 includes a groove or channel 210.
  • the groove 210 may have a semi-circular profile. As the S-seal is compressed between the mandrel 102 and the tubing 104, the groove 210 increases the energy applied to the side face 206 in the area between the groove 210 and the intersection of the side face 206 and the sealing face 204 (i.e., the area between the groove 210 and the corner where the spring 208 is embedded).
  • the groove 210 is disposed to cause the side face 206 to seal with the gland wall 302 along a radius 306 of the spring 208.
  • the manufacturing tolerances of the gland walls 302 used with the S-seal 106 may be relaxed when compared to the tolerances required for use with a conventional S- seal. Thus, the manufacturing costs of devices using the S-seal 106 may be reduced.
  • the gland walls 302 may be disposed at an acute, rather than a normal, angle from the gland bottom 304.
  • the sealing face 204 of the S-seal 106 includes a protrusion or projected surface 212. Some embodiments include a groove 214 in the projected surface increases the energy applied to the sealing face 204 when the S-seal is compressed, thereby improving the seal between the sealing face 204 and the inner surface of the tubing 104.
  • the gland face 202 is a non- sealing face. That is, the gland face 202 is not intended to form a seal with the gland bottom 304.
  • the gland face 202 may lack grooves, such as those included in the side and seal faces.
  • FIGS 4A-4C show views of an embodiment of the S-seal 400.
  • the S- seal 400 is configured to seat in a gland in the interior wall of the tubing 104. Consequently, the sealing face 404 is disposed on the inner diameter of the S- seal 400 and is configured to seal against an opposing surface (e.g., the outer surface of the mandrel 102).
  • the gland face 402 is disposed on the outer diameter of the S-seal 400 and is configured to seat against the bottom of the gland.
  • the side faces 406 of the S-seal 400 extend from the gland face 402 to the sealing face 404. In some embodiments, the side faces 406 are normal to at least one of the sealing face 404 and the gland face 402.
  • the body of the S-seal 400 is generally formed of an elastomer, such as nitrile, hydrogenated nitrile butadiene rubber (HNBR), etc. Selection of a particular elastomer may be based on the pressure, temperature, and chemical environment in which the S-seal is to operate.
  • Coil springs 408 are embedded in the body of the S-seal 400 at the intersection of the sealing face 404 with each side face 406. The coil springs 408 inhibit extrusion of the elastomer when the S- seal 400 is exposed to extreme pressure and/or temperature.
  • the springs 408 may be formed of stainless steel or an alloy of nickel and chromium, such as an INCONEL alloy.
  • Embodiments of the S-seal 406 are configured to seal along the side walls of the gland in which the S-seal 400 is seated.
  • the side faces 406 are sealing faces.
  • Each of the side faces 406 includes a groove or channel 410.
  • the groove 410 increases the energy applied to the side face 406 in the area between the groove 410 and the intersection of the side face 406 and the sealing face 404 (i.e., the area between the groove 410 and the corner where the spring 408 is embedded).
  • the increased surface energy applied to the side face 406 causes the side face 406 to form a robust seal with the side wall of the gland.
  • the groove 410 is disposed to cause the side face 406 to seal with the gland wall on a radius of the spring 408.
  • the manufacturing tolerances of the gland walls used with the S-seal 400 may be relaxed when compared to use with a conventional S-seal. Thereby reducing manufacturing costs.
  • the gland walls may be disposed at an acute, rather than a normal angle from the gland bottom.
  • the sealing face 404 of the S-seal 400 includes a protrusion or projected surface 412.
  • a groove 414 in the projected surface increases the energy applied to the sealing face 404 when the S-seal 400 is compressed, thereby improving the seal between the sealing face 404 and the outer surface of the mandrel 102.
  • the gland face 402 is a non- sealing face. That is, gland face 402 is not intended to form a seal with the gland bottom on which the gland face is seated.
  • the gland face 402 may lack grooves.

Landscapes

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

Abstract

L'invention porte sur un joint S pour sceller un anneau entre une surface extérieure de mandrin et une surface intérieur de tube. Selon un mode de réalisation, le joint S comprend un anneau comprenant une face de joint, une face de manchon de raccordement, des faces latérales opposées. La face de manchon de raccordement est opposée à la face de joint. Les faces latérales s'étendent entre la face de joint et les faces de manchon de raccordement. Un ressort est intégré dans l'anneau à une intersection de chaque face latérale avec la face de joint. Chaque face latérale comprend un sillon disposé entre le ressort et une intersection de la face de manchon de raccordement et de la face latérale.
PCT/US2012/050782 2011-08-18 2012-08-14 Joint s WO2013025709A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/212,780 2011-08-18
US13/212,780 US20130043657A1 (en) 2011-08-18 2011-08-18 S-seal

Publications (1)

Publication Number Publication Date
WO2013025709A1 true WO2013025709A1 (fr) 2013-02-21

Family

ID=47712108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/050782 WO2013025709A1 (fr) 2011-08-18 2012-08-14 Joint s

Country Status (2)

Country Link
US (1) US20130043657A1 (fr)
WO (1) WO2013025709A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016019110A2 (fr) * 2014-08-01 2016-02-04 Utex Industries, Inc. Joint haute pression doté d'un mécanisme anti-extrusion composite
CA2971085C (fr) 2014-12-17 2021-11-30 Managed Pressure Operations Pte. Ltd. Dispositifs de confinement de pression
WO2019183160A1 (fr) * 2018-03-21 2019-09-26 Schlumberger Technology Corporation Joint lié à fluoroélastomère à haute performance pour des applications de fond de trou
BR112022011221A2 (pt) * 2020-01-07 2022-08-30 Kinetic Pressure Control Ltd Válvula de segurança, e, método para operar uma válvula de segurança

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334389A2 (fr) * 1983-07-19 1989-09-27 Bralorne Resources Limited Joints d'étanchéité pour têtes de puits
US5330201A (en) * 1991-04-09 1994-07-19 Cooper Industries, Inc. Sealing assembly
WO2010083132A1 (fr) * 2009-01-19 2010-07-22 Cameron International Corporation Joint d'étanchéité ayant une rainure de régulation de contrainte
US20100181729A1 (en) * 2003-11-20 2010-07-22 Halliburton Energy Services, Inc. Downhole Seal Element Formed From a Nanocomposite Material

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2272650A (en) * 1936-02-21 1942-02-10 Freudenberg Carl Gmbh Fluid seal for direct insertion between relatively moving machine parts
US3642293A (en) * 1970-07-27 1972-02-15 George V Woodling Rotary shaft fluid seal for high pressure
US6173964B1 (en) * 1998-07-07 2001-01-16 Greene, Tweed Of Delaware, Inc. Seal assembly with backup elements having coil springs positioned therein
WO2011130182A2 (fr) * 2010-04-12 2011-10-20 Schaeffler Technologies Gmbh & Co. Kg Convertisseur de couple comprenant un absorbeur de masse de turbine
BR112013020850B1 (pt) * 2011-02-16 2021-03-02 Weatherford Technology Holdings Llc conjunto de vedação de ancoragem e método de criar uma vedação e uma ancoragem entre uma primeira seção tubular e uma segunda seção tubular
US9617818B2 (en) * 2011-04-29 2017-04-11 Onesubsea Ip Uk Limited Seal having stress control groove
US9260926B2 (en) * 2012-05-03 2016-02-16 Weatherford Technology Holdings, Llc Seal stem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0334389A2 (fr) * 1983-07-19 1989-09-27 Bralorne Resources Limited Joints d'étanchéité pour têtes de puits
US5330201A (en) * 1991-04-09 1994-07-19 Cooper Industries, Inc. Sealing assembly
US20100181729A1 (en) * 2003-11-20 2010-07-22 Halliburton Energy Services, Inc. Downhole Seal Element Formed From a Nanocomposite Material
WO2010083132A1 (fr) * 2009-01-19 2010-07-22 Cameron International Corporation Joint d'étanchéité ayant une rainure de régulation de contrainte

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