EP0122708B1 - Obturateur anti-éruption annulaire - Google Patents

Obturateur anti-éruption annulaire Download PDF

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Publication number
EP0122708B1
EP0122708B1 EP84301549A EP84301549A EP0122708B1 EP 0122708 B1 EP0122708 B1 EP 0122708B1 EP 84301549 A EP84301549 A EP 84301549A EP 84301549 A EP84301549 A EP 84301549A EP 0122708 B1 EP0122708 B1 EP 0122708B1
Authority
EP
European Patent Office
Prior art keywords
packer
annular
opening
blowout preventer
plug
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.)
Expired
Application number
EP84301549A
Other languages
German (de)
English (en)
Other versions
EP0122708A3 (en
EP0122708A2 (fr
Inventor
Gary R. Schaeper
William M. Taylor
Bolie C. Williams Iii
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.)
Cooper Industries LLC
Original Assignee
Cameron Iron Works 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 Cameron Iron Works Inc filed Critical Cameron Iron Works Inc
Priority to AT84301549T priority Critical patent/ATE36578T1/de
Publication of EP0122708A2 publication Critical patent/EP0122708A2/fr
Publication of EP0122708A3 publication Critical patent/EP0122708A3/en
Application granted granted Critical
Publication of EP0122708B1 publication Critical patent/EP0122708B1/fr
Expired 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
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers

Definitions

  • This invention relates to annular blowout preventers.
  • the resilient packer of an annular blowout preventer can wear and be damaged.
  • Changing the packer in present annular blowout preventers requires the removal of the upper end connection plus other elements of the BOP stack which are above the annular preventer such as the bell nipple, stripper, or rotating head. To do this clearance must be provided between the rig floor substructure and the top of the BOP to allow the top to be lifted clear to provide access to the packer. This is very inconvenient in snubbing operations. Also the top portion of most present annular blowout preventers is large and heavy which reduces the clearance and increases the difficulty of replacing the packer.
  • U.S. Patent No. 2154955 discloses a well casing control valve having removable side plates allowing access for ram changes.
  • U.S. Patent No. 2320974 discloses a ram type blowout preventer with removable side plates for changing internal ram operating mechanisms and rams.
  • U.S. Patent No. 2592197 discloses a ram type blowout preventer with side windows for each ram for insertion and removal of the rams with covers secured over the windows for each ram for insertion and removal of the rams with covers secured over the windows.
  • an annular blowout preventer comprising a body having a central bore extending therethrough with an annular packer recess surrounding and opening to said bore, an annular packer positioned in said recess in surrounding relationship to said bore, means for loading said packer to seal within said bore, characterised in that the preventer includes an opening through the side of said body into said packer recess, a plug for sealing said opening, and means for retaining said plug in said opening, said plug having an interior surface for supporting the exterior surface of said packer in said opening.
  • a feature of the present invention is the provision of an improved annular blowout preventer in which the annular packer may be changed without regard to the vertical clearance available.
  • Annular blowout preventer 10 includes body 12 having central bore 14 extending therethrough with packer recess 16 surrounding and opening onto bore 14.
  • Body 12 includes lower flange 18, inner upstanding rim 20 and outer upstanding rim 22.
  • Upper end closure 24 is threaded into rim 22 and has depending rim 26 extending to a position between rims 20 and 22, and forming annular chamber 28.
  • Upper end closure 24 extends inward as flange 30 to proved shoulder 32 at the upper end of packer recess 16.
  • Annular packer 34 is positioned in packer recess 16 between shoulder 32 and annular actuating plate 36.
  • Means for axially loading annular packer 34 is provided by piston 38 which is slidable in chamber 28 responsive to pressure through port 38a and port 38b and connected to annular actuating plate 36 by annular arm 40.
  • Annular packer 34 includes resilient annulus 41 with upper insert plates 42 and lower insert plates 44 embedded therein. Annular packer 34 is split and preferably has two semi-annular sections 34a and 34b. as shown in FIGURE 2. Ring 46 is embedded in the exterior of resilient annulus 41 and has a plurality of tapped holes 48 to allow firm engagement of packer 34 during removal. Annular packer 34 is split as described and shown to allow it to be removed easily from recess 16 through opening 50 in rim 22 and depending rim 26 of end closure 24 as best seen in FIGURE 2.
  • Opening 50 includes inner rectangular opening 52 with shoulder 54 at its inner end and outer rectangular opening 56 with shoulder 58 facing outward at the inner end of opening 56.
  • Plug 60 is shaped to fit closely into opening 52 and 56, to engage shoulder 54 and capture seal ring 62 between shoulder 64 on plug 60 and shoulder 58.
  • the inner surface 66 of plug 60 is cylindrical to form a portion of the wall of recess 16.
  • Plug 60 is retained in opening 50 by sleeve 68 which surrounds outer rim 22 of body 12 from a position above opening 50 to a position below opening 50.
  • Suitable means for supporting sleeve 68 in its plug retaining position is provided in the form of lugs 70 secured to outer rim 22 by screws 72.
  • packer 34 Whenever it is desired to replace packer 34 then screws 72 are removed and sleeve 68 is lowered to the position shown in FIGURE 3 so that plug 60 can be removed. With plug 60 removed packer sections 34a and 34b can be removed even with a pipe extending through bore 14.
  • annular blowout preventer 80 includes outer rim 82 and depending rim 84 of end closure with inner rectangular opening 86 extending transversely thereof and outer rectangular openings 88 and 90 provide shoulders 92 and 94.
  • Plugs 96 and 98 are positioned therein and seal rings 100 and 102 are positioned between shoulders 104 and 106 on plugs 96 and 98 and shoulders 92 and 94.
  • Sleeve 108 surrounds rim 82 and retains plugs 96 and 98 in position sealing both ends of bore 86.
  • Packer 110 includes sections 112 and 114 and has ring 116 embedded therein with tapped holes 118 to assist in removal of packer sections 112 and 114 through opposite sides of bore 86 after plugs 96 and 98 are removed.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Closures For Containers (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing Of Meat And Fish (AREA)

Claims (10)

1. Obturateur annulaire de puits, comportant un corps (12) traversé par un alésage central (14), un évidement annulaire (16) pour garniture d'étanchéité entourant cet alésage et s'ouvrant sur celui-ci, une garniture d'étanchéité annulaire (34) placée dans ledit évidement et entourant ledit alésage, des moyens (28, 38) pour mettre sous contrainte la garniture d'étanchéité afin de réaliser l'étanchéité à l'intérieur de l'alésage, caractérisé en ce que l'obturateur comporte une ouverture (50) traversant le côté du corps et débouchant dans l'évidement (16) pour garniture d'étanchéité, un bouchon (60) pour fermer de façon étanche cette ouverture, et des moyens (68) pour retenir le bouchon dans cette ouverture, le bouchon (60) présentant une surface intérieure servant d'appui à la surface extérieure de la garniture d'étanchéité dans l'ouverture.
2. Obturateur annulaire de puits conforme à la revendication 1, caractérisé en ce que la garniture d'étanchéité (34) comporte deux parties (34a, 3b).
3. Obturateur annulaire de puits conforme à la revendication 1 ou à la revendication 2, caractérisé en ce qu'il comprend des moyens (46, 48) dans la garniture d'étanchéité permettant de venir en prise avec celle-ci afin de la tirer par l'ouverture.
4. Obturateur annulaire de puits conforme à l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de retenue (68) comportent un manchon entourant le corps et venant en prise avec l'extérieur du bouchon.
5. Obturateur annulaire de puits conforme à la revendication 4, caractérisé en ce qu'il comprend des moyens (70) pour maintenir le manchon en prise avec l'extérieur du bouchon.
6. Obturateur annulaire de puits conforme à la revendication 1, caractérisé en ce que l'ouverture (86, 88, 90) traverse les deux côtés du corps avec un bouchon (96, 98) de chaque côté de l'ouverture, et en ce que la garniture d'étanchéité (110) est divisée en deux parties (112, 114).
7. Obturateur annulaire de puits conforme à la revendication 1, caractérisé en ce que la garniture d'étanchéité comporte un anneau élastique (41), dans la surface supérieure duquel sont encastrées plusieurs plaques supérieures rapportées (42) et dans la surface inférieure duquel sont encastrées plusieurs plaques inférieures rapportées (44), et en ce que les moyens de mise sous contrainte comprennent une chambre de piston annulaire (28), ménagée dans le corps, et un piston (38) mobile dans celle-ci sous l'action d'une pression admise dans la chambre de part et d'autre du piston de sorte que le piston met axialement la garniture d'étanchéité sous contrainte.
8. Obturateur annulaire de puits conforme à la revendication 1, caractérisé en ce qu'il comprend une bague (46) encastrée à la périphérie extérieure de la garniture d'étanchéité et dans laquelle sont percés des trous taraudés (48), lesdits trous taraudés permettant de venir en prise avec la garniture d'étanchéité pour tirer celle-ci par l'ouverture.
9. Obturateur annulaire de puits conforme à la revendication 7, caractérisé en ce qu'il comprend une plaque d'actionnement annulaire (36) reliée au piston (38) et en contact avec la surface inférieure de la garniture d'étanchéité, la disposition étant telle qu'un déplacement du piston dans un sens met axialement sous contrainte la garniture d'étanchéité pour la faire se déplacer vers l'intérieur et venir en position d'étanchéité, et qu'un déplacement du piston dans l'autre sens libère la garniture d'étanchéité pour lui permettre de quitter sa position d'étanchéité et de se détendre.
10. Obturateur annulaire de puits conforme à la revendication 1, caractérisé en ce que la garniture d'étanchéité comporte une seule bague annulaire (46).
EP84301549A 1983-04-13 1984-03-08 Obturateur anti-éruption annulaire Expired EP0122708B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84301549T ATE36578T1 (de) 1983-04-13 1984-03-08 Ringfoermiges ausblasventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48451283A 1983-04-13 1983-04-13
US484512 1983-04-13

Publications (3)

Publication Number Publication Date
EP0122708A2 EP0122708A2 (fr) 1984-10-24
EP0122708A3 EP0122708A3 (en) 1985-05-15
EP0122708B1 true EP0122708B1 (fr) 1988-08-17

Family

ID=23924456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301549A Expired EP0122708B1 (fr) 1983-04-13 1984-03-08 Obturateur anti-éruption annulaire

Country Status (5)

Country Link
EP (1) EP0122708B1 (fr)
JP (1) JPS59199989A (fr)
AT (1) ATE36578T1 (fr)
DE (1) DE3473489D1 (fr)
SG (1) SG19789G (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6352120B1 (en) * 1999-02-08 2002-03-05 Hydril Company Packer insert for sealing on multiple items in the wellbore
US9938793B2 (en) 2015-11-24 2018-04-10 Freudenberg Oil & Gas, Llc Spherical blow out preventer annular seal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2154955A (en) * 1937-02-02 1939-04-18 Kerotest Mfg Company Well casing control valve
US2320974A (en) * 1941-08-18 1943-06-01 Macclatchie Mfg Company Of Cal Blowout preventer
US2592197A (en) * 1947-10-27 1952-04-08 Jr Frank J Schweitzer Side-plug hydraulic cellar gate
US3915425A (en) * 1973-01-22 1975-10-28 Hydril Co Blowout preventer with variable inside diameter
US4310139A (en) * 1980-04-04 1982-01-12 Cameron Iron Works, Inc. Annular blowout preventer

Also Published As

Publication number Publication date
EP0122708A3 (en) 1985-05-15
EP0122708A2 (fr) 1984-10-24
ATE36578T1 (de) 1988-09-15
SG19789G (en) 1989-09-01
JPS59199989A (ja) 1984-11-13
JPH0361834B2 (fr) 1991-09-24
DE3473489D1 (en) 1988-09-22

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