EP0447204A2 - Packer gonflable avec élément d'étanchéité gonflable pour puits souterrains - Google Patents

Packer gonflable avec élément d'étanchéité gonflable pour puits souterrains Download PDF

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Publication number
EP0447204A2
EP0447204A2 EP91302105A EP91302105A EP0447204A2 EP 0447204 A2 EP0447204 A2 EP 0447204A2 EP 91302105 A EP91302105 A EP 91302105A EP 91302105 A EP91302105 A EP 91302105A EP 0447204 A2 EP0447204 A2 EP 0447204A2
Authority
EP
European Patent Office
Prior art keywords
sleeve
ribs
shoulder
elastomeric body
tubular
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.)
Granted
Application number
EP91302105A
Other languages
German (de)
English (en)
Other versions
EP0447204B1 (fr
EP0447204A3 (en
Inventor
Rustom K. Mody
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 Holdings LLC
Original Assignee
Baker Hughes 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 Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of EP0447204A2 publication Critical patent/EP0447204A2/fr
Publication of EP0447204A3 publication Critical patent/EP0447204A3/en
Application granted granted Critical
Publication of EP0447204B1 publication Critical patent/EP0447204B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/127—Packers; Plugs with inflatable sleeve
    • E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve

Definitions

  • the invention relates to the construction of an inflatable pacing element for use in inflatable packers or bridge plugs employed in subterranean wells.
  • Inflatable packers have long been utilized in subterranean wells.
  • Such inflatable tools normally comprise an elastomeric sleeve element mounted in surrounding relationship to a tubular body portion. Pressured fluid is communicated from the surface of the well to the bore of the tubular body and then through radial passages to the interior of the elastomeric sleeve.
  • To protect the elastomeric sleeve it is customary to completely surround the elastomeric sleeve with a plurality of peripherally overlapping, resilient, reinforcing slats or ribs.
  • the medial portions of the reinforcing ribs are surrounded by and may be bonded to an outer annular elastomeric packing element or cover of substantial wall thickness.
  • Upper and lower securing assemblies respectively engage the ends of the elastomeric sleeve and the reinforcing ribs and is fixedly and sealably secured relative to a central tubular body.
  • a lower securing assembly is secured to a sealing sub which is mounted for slidable and sealable movement on the exterior of the central tubular body, in response to the inflation forces.
  • U.S. patent number 3,160,211 to MALONE A structure of this general type is shown in U.S. patent number 3,160,211 to MALONE.
  • the ends of the cylindrical cage of peripherally overlapped slats or ribs surrounding an inflatable elastomeric sleeve of an inflatable packing element are respectively welded to an external surface of a force transmitting sleeve.
  • Such force transmitting sleeve is further provided with an external shoulder which is disposed in abutting relationship with an internal shoulder provided on the respective mounting sleeve for securing the entire inflatable assemblage to the body of the inflatable packer or bridge plug.
  • the location of the abutting shoulders is deliberately selected so as to provide an axial length of the circumferential array of resilient slats or ribs in frictional contact with the internal bore of the mounting sleeve.
  • Fig. 1 is a combination perspective and sectional view illustrating a prior art method of welding the ends of the reinforcing ribs to the mounting sleeve of an inflatable packer.
  • Fig. 2 is a vertical quarter sectional view of the mounting sleeve portion of an inflatable packer wherein the reinforcing ribs are secured by utilization of the construction of this invention.
  • Fig. 3 is a view similar to Fig. 2 but illustrating the effects of application of inflation pressures to the elastomeric sleeve of the mounting construction of Fig. 1.
  • Fig. 4 is an enlarged scale sectional view taken on the plane 4-4 of Fig. 2.
  • FIG. 1 a prior art construction for securing the reinforcing ribs of an inflatable element for an inflatable packer or bridge plug is shown.
  • the ends of each ribs is welded to an interior surface of a mounting sleeve.
  • a sleeve of elastomeric material (not shown) is inserted within the rib cage and the end secured in conventional fashion. It should be noted, however, that the welding has to be accomplished in a small internal bore surface and this is recognized to be a difficult procedure to consistently produce good welds for each of the multitude of reinforcing ribs.
  • FIG. 2 only the upper securing portion of the inflatable element of an inflatable packer or bridge plug is shown. All other elements of the inflatable packer or bridge plug, including the valving apparatus for supplying inflation pressures are well known in the art. See for example, U.S. Patent No. 4,832,120; U.S. Patent No. 4,708,208; and U.S. Patent No. 4,805,699, and the disclosures of such patents are hereby incorporated by reference.
  • Inflatable element 10 comprises a cylindrical cage of peripherally overlapping flexible metal slats or ribs 12, the configuration of which is best shown in the enlarged sectional view of Fig. 4.
  • the ends 12a of such ribs are welded to a force transmitting sleeve or end ring 14 by a weld W which is accomplished after the insertion of the ribs through a mounting sleeve or anchor sleeve 20.
  • the force transmitting sleeve 14 is provided with an external shoulder 14a which cooperates with an internal shoulder 20a provided on a medial portion of mounting sleeve 20 for transmitting tensile forces exerted on the ribs 12 to the mounting sleeve 20.
  • An inflatable tube or sleeve 30 of elastomeric material is inserted within the bore of the rib cage 12 and passes through the bore 14b of the force transmitting sleeve 14.
  • a tube retainer 11 is installed inside the mounting sleeve or anchor sleeve 20, radially forcing the inflatable tube or sleeve 30 of elastomeric material to extrude and engage in appropriate circumferential grooves 20c formed in mounting sleeve 20.
  • Anchor body 1 is provided with external threads 1b for threadably engaging the upper end of the mounting sleeve 20. Such threads are sealed by an 0-ring 1e.
  • a cover portion 35 of elastomeric material is bonded to the medial portions of the rib cage 12 to provide a sealing contact with the bore of a well or well conduit, as is customary.
  • the internal surface of anchor body 1 cooperates with an internal body tube 2 to define an annular passage 1c and radial ports 1d for application of fluid pressure to the interior of the elastomeric sleeve 30.
  • the application and maintenance of fluid pressure on the interior of the elastomeric sleeve 30 is accomplished in a manner well known in the art and fully disclosed in the aforementioned patents, hence further description is deemed unnecessary.
  • the inflatable packing element 10 is expanded to assume the configuration illustrated in Fig. 3.
  • the tensile forces developed in the ribs 12 by such expansion are transmitted by the welds W to the force transmitting sleeve or end ring 14 and by the peripheral shoulder 14a to the mounting sleeve 20 and the anchor body 1.
  • the location of the force transmitting sleeve 14 relative to the length of the mounting sleeve 20 is an important feature of this invention.
  • the force transmitting sleeve is preferably located above the central or medial portion of the mounting sleeve 20 so that a substantial length of the ribs 12 are disposed in frictional engagement with the bore 20b of the mounting sleeve 20. These frictional forces are substantially increased by the fluid pressure forces illustrated by the arrows shown in Fig. 3 and result from the application of the inflation pressure.
  • the aforedescribed construction resolves a troublesome constructural defect of inflatable packers or bridge plugs through not only the substantial elimination of welding defects caused by performing rib welds in an internal bore, but also significantly reduces the tensile forces applied to the welds through the utilization of an extended longitudinal bore area of the mounting sleeve in frictional contact with the reinforcing ribs 12 when such ribs are expanded by inflation pressure.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials For Medical Uses (AREA)
  • Piles And Underground Anchors (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Packages (AREA)
  • Buffer Packaging (AREA)
EP91302105A 1990-03-13 1991-03-13 Packer gonflable avec élément d'étanchéité gonflable pour puits souterrains Expired - Lifetime EP0447204B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49284190A 1990-03-13 1990-03-13
US492841 1990-03-13

Publications (3)

Publication Number Publication Date
EP0447204A2 true EP0447204A2 (fr) 1991-09-18
EP0447204A3 EP0447204A3 (en) 1992-03-04
EP0447204B1 EP0447204B1 (fr) 1997-07-09

Family

ID=23957844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91302105A Expired - Lifetime EP0447204B1 (fr) 1990-03-13 1991-03-13 Packer gonflable avec élément d'étanchéité gonflable pour puits souterrains

Country Status (5)

Country Link
EP (1) EP0447204B1 (fr)
AT (1) ATE155203T1 (fr)
CA (1) CA2038105C (fr)
DE (1) DE69126722D1 (fr)
NO (1) NO303698B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6666276B1 (en) * 2001-10-19 2003-12-23 John M. Yokley Downhole radial set packer element
EP3049612A4 (fr) * 2013-09-24 2017-10-18 Halliburton Energy Services, Inc. Joint d'étanchéité renforcé de tige de forage ayant une couche de support flottante
CN110042868A (zh) * 2019-05-14 2019-07-23 中建五局土木工程有限公司 防跳车窨井及其施工方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403660A (en) * 1980-08-08 1983-09-13 Mgc Oil Tools, Inc. Well packer and method of use thereof
US4544165A (en) * 1983-05-16 1985-10-01 Xenpax, Inc. Inflatable packer
US4979570A (en) * 1989-11-28 1990-12-25 Baker Hughes Incorporated Inflatable tool with rib expansion support

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6666276B1 (en) * 2001-10-19 2003-12-23 John M. Yokley Downhole radial set packer element
EP3049612A4 (fr) * 2013-09-24 2017-10-18 Halliburton Energy Services, Inc. Joint d'étanchéité renforcé de tige de forage ayant une couche de support flottante
US10240422B2 (en) 2013-09-24 2019-03-26 Halliburton Energy Services, Inc. Reinforced drill pipe seal with floating backup layer
CN110042868A (zh) * 2019-05-14 2019-07-23 中建五局土木工程有限公司 防跳车窨井及其施工方法
CN110042868B (zh) * 2019-05-14 2023-12-29 中建五局土木工程有限公司 防跳车窨井及其施工方法

Also Published As

Publication number Publication date
EP0447204B1 (fr) 1997-07-09
CA2038105C (fr) 2002-01-08
CA2038105A1 (fr) 1991-09-14
NO303698B1 (no) 1998-08-17
ATE155203T1 (de) 1997-07-15
EP0447204A3 (en) 1992-03-04
NO910983D0 (no) 1991-03-12
DE69126722D1 (de) 1997-08-14
NO910983L (no) 1991-09-16

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