US3917293A - Controlled closing pattern packing unit for blowout preventer - Google Patents

Controlled closing pattern packing unit for blowout preventer Download PDF

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Publication number
US3917293A
US3917293A US483311A US48331174A US3917293A US 3917293 A US3917293 A US 3917293A US 483311 A US483311 A US 483311A US 48331174 A US48331174 A US 48331174A US 3917293 A US3917293 A US 3917293A
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United States
Prior art keywords
packer
plates
webs
axis
certain
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Expired - Lifetime
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US483311A
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English (en)
Inventor
George E Lewis
Fernando Murman
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Hydril LLC
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Hydril LLC
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Publication date
Application filed by Hydril LLC filed Critical Hydril LLC
Priority to US483311A priority Critical patent/US3917293A/en
Priority to US05/552,859 priority patent/US3958808A/en
Priority to CA229,609A priority patent/CA1023659A/fr
Priority to FR7519112A priority patent/FR2276453A1/fr
Priority to DE2528102A priority patent/DE2528102C3/de
Priority to GB10592/77A priority patent/GB1512658A/en
Priority to GB26790/75A priority patent/GB1512657A/en
Application granted granted Critical
Publication of US3917293A publication Critical patent/US3917293A/en
Priority to CA280,305A priority patent/CA1033661A/fr
Priority to CA280,303A priority patent/CA1036930A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

  • blowout preventer packing units have followed the principles described in U.S. Pat. No. 2,609,836 to Knox.
  • Such units incorporate like metal inserts equally spaced about the packer central axis, and embedded by an elastomeric body.
  • the material is anchored by insert webs as it produces vertical folds stretching radially inwardly to seal against the pipe.
  • the number of folds will equal the number of inserts, and they will be alike in circumferential contour.
  • the elastomeric material of the folds advancing toward the axis must at certain times and places stretch or extend as much as 350 to 400%.
  • the invention contemplates reducing the stress levels in the energized rubber or elastomeric pressure during its inward flow, by reducing deformation under pressure. As will appear, this is achieved in a broad sense by locating the insert webs with spacing from the central axis and from each other in such relation as to provide differential anchoring about the axis of circularly spaced portions of the elastomeric material subject to inward displacement, with resultant opening-up of rubber flow paths between the inserts.
  • the anchoring of the rubber by certain webs is closer to the central axis than anchoring of the material by other webs; i.e., webs effectively closer to and further from the axis may alternate about that axis.
  • the webs may begenerally equally spaced from the axis, but certain pairs of webs may have closer circular spacing about that axis than other pairs of webs.
  • Another object of the invention concerns the provision of differently formed or shaped end plates on the webs, and characterized as promoting or facilitating the sought advantages.
  • certain top and/or bottom plates on certain inserts are located to move closer to the central axis than other plates on other inserts, during radial constriction of the packer; further, the certain plates may be formed to interfit at 2 their inner ends as the packer constricts, and other plates may be shaped, as for example tapered, to approach engagement with opposite sides of the interfitting plates as the packer constricts.
  • a method aspect of the invention may involve the steps:
  • the invention contemplates the angling of facing sides of adjacent plates to form a space therebetwen which tapers away from the main body of packer material to minimize entrapment of and possible damage to such elastomeric material flowing into such space during packer constriction.
  • FIG. 1 is an elevation, partly in section, showing use of the new packer
  • FIG. 2 is an enlarged horizontal section, taken on lines 22 of FIG. 1, and showing the packer in open condition;
  • FIG. 3 is a vertical section on lines 3-3 of FIG. 2;
  • FIG. 4 is a view like FIG. 2, and showing the packer in partly closed condition
  • FIG. 5 is a vertical section on lines 5-5 of FIG. 4;
  • FIG. 6 is a view like FIG. 2, but showing the packer fully closed about a well pipe
  • FIG. 6a is a fragmentary view like FIG. 6;
  • FIG. 6b is an enlarged section on lines 6b6b of FIG. 6a;
  • FIG. 7 is a vertical section on lines 7-7 of FIG. 6;
  • FIG. 8 is a section on lines 8-8 of FIG. 3;
  • FIG. 9 is a perspective showing of two types of metallic inserts used in the packer of FIGS. 28;
  • FIGS. 10-12 are fragmentary plan view showings of a modified packer in open, partly closed and fully closed conditions, respectively;
  • FIGS. 13 and 14 are fragmentary plan view showings of two additional modified packers, in closed condi- FIGS. 18 and 19 are fragmentary plan view showings of yet another modified packer in open and fully closed positions, respectively;
  • FIGS. 20-22 are fragmentary plan view showings of a further modified packer in open, partly closed and fully closed conditions, respectively;
  • FIGS. 23-25 are fragmentary plan view showings of still another modified packer, in open, partly closed and fully closed conditions, respectively;
  • FIGS. 2628 are fragmentary vertical sections through a modified packer in open, partly closed and fully closed conditions, respectively.
  • FIGS. 29 and 30 are plan views of further modified packers.
  • a blowout preventer includes a metallic housing 11, the lower most extent of which is flanged at 12 and bolted at 13 to well head casing flange 14 or other well head equipment.
  • THe housing contains a piston 15 movable upwardly in chamber 16 in response to fluid pressure exertion upwardly against piston face 17, for constricting an annular packer unit 18 via pressure exertion from piston cam surface 22 against packer exterior surface 23.
  • Surfaces 22 and 23 are frusto-conical and flared upwardly.
  • the packer when sufficiently radially inwardly displaced, seals off about a well pipe 19 shown extending axially vertically through the preventer 10; and in the absence of the pipe, the packer unit 18 will completely close off the vertical passage through the preventer, when the unit is sufficiently constricted by piston 15.
  • the packer Upon downward movement of the piston in response to fluid pressure exertion against face 24, the packer expands radially outwardly to the open position seen in FIGS. 1 and 2.
  • the piston annular surface 25 may have guided sliding engagement with housing cap bore 26, and that the packer unit is normally confined vertically under the housing cap lower interior surface 27.
  • the packer unit comprises metallic inserts generally circularly spaced about the longitudinal central axis of the unit, the inserts including webs that extend generally longitudinally; an annulus of elastomeric material extending about the packer axis and embedding the webs so that they anchor the material during inward compressive displacement or constriction of the packer; and the spacing of the webs from that axis and from each other is characterized by differential anchoring about the axis of circularly spaced portions of the elastomeric material subject to inward displacement about the axis.
  • differential anchoring facilitates differential inward flow or extrusion of circularly spaced portions of the elastomeric material, as will be seen, to the end that maximum stretching of the material is minimized and maximum stresses are correspondingly minimized.
  • Such material is designated at 34.
  • the metallic inserts include certain inserts having certain webs 31, and other inserts 32 having other webs 33, an the anchoring of the elastomeric material 34a by certain webs 31 is closer to the central axis 40 then the anchor ing of the material 34b by the other webs 33 as is clear from FIG. 3.
  • the thickness of the material 34a between the inner edge portions 35 of webs 31 and the packer bore 36 is less than the thickness of the material 34b between the inner edge portions 37 of webs 33 and the packer bore 36, in planes normal to axis 40; also, inner edge portions 35 of webs 31 are located, closer to axis 40 than inner edge portios 37 of webs 33, in planes normal to axis 40, and webs 31 alternate with webs 33 about axis 40, as is clear from FIG. 2.
  • the webs may additionally carry buttons 42 to provide additional surface to which the elastomeric material may be attached, for additional anchoring effect.
  • Such material may for example consist of synthetic or natural rubber.
  • the inserts also have plates integral with the webs, and circularly spaced about axis 40, certain plates on certain inserts located to move closer to axis 40 than other plates on other inserts during radially inward compressive displacement of the packer.
  • the top plates 44 on certain inserts 30 are located to move closer to axis 40 than the top plates 45 on.
  • FIGS. 2 and 3 OPEN
  • FIGS. 4 and 5 PARTLY CLOSED
  • FIGS. 6 and 7 FULLY CLOSED
  • plates 44 and 45 alternate around tha axis 40; that the plates each have circularly spaced opposite sides, and that radially 49 of wedge shaped plates 45 taper directionally inwardly so as to engage opposite sides 48 of plates 44 as seen in FIG. 6. Accordingly, sides 49 are parallel to 1 sides 48 with which they are engageable.
  • the tops 50 and 51 of the plates 44 and 45 project above the top level of the elastomeric body material 34, so as to be slidably engageable with the housing surface 27 as referred to above, and the outer extents 50a and 51a of such tops are beveled downwardly and outwardly, as
  • FIGS. 2 and 3 OPEN
  • FIGS. 4 and 5 PARTLY CLOSED
  • FIGS. 6 and 7 FULLY CLOSED
  • Plates 52 and 53 integral with the webs 31 and 33 respectively, alternate about axis 40; plates 52 have generally parallel opposite sides 54 the extend generally inwardly and parallel to sides 48 of plates 44; and plates 53 have opposite sides 55 that taper inwardly toward the center region of the packer, to engage sides 54.
  • FIGS. 3, 5 and 7 also illustrate the condition that the radial thickness of the elastomeric material 34c radially outwardly of certain webs 31 is greater than the radial thickness of the elastomeric material 34d radially outwardly of other webs 33, in planes normal to axis 40. Plates 52 and 53 seat on the upper end 28' of tube 29, when the packer unit is not constricted inwardly by piston 15.
  • FIGS. 4-7 illustrate the manner in which elastomeric material flows inwardly in protruding folds or waves 60, one for each pair of inserts as the packer is constricted inwardly.
  • Each fold forms to have an inwardly convex surface 61 which advances toward pipe 19, the opposite outer edges 61a of adjacent surfaces 61 merging as cusps 62 located directly radially inwardly of the webs 31; and the innermost edge of each fold lies directly inwardly of a web 33.
  • FIGS. 6 and 7 show the folds in compressive sealing engagement with the pipe, and each other.
  • the circular spacing between successive webs is opened up, by virtue of their successive inward, outward, inward, outward etc. configurations about axis 40, whereby flow of maximum elastomeric material between the webs is facilitated so that significantly less overall strain of the material is required in order to effect sealing closure about the pipe, than was required in the packer design of US. Pat. No. 2,609,836.
  • the bore in FIG. 3 includes annular frusto-conical surface 65 flaring upwardly from ring-shaped surface 36; and ring shaped surface 66 directly above surface 65.
  • the innermost edge 67 of each top plate 44 extends as a circular segment about axis 40, and likewise, the innermost edge 68 of each bottom plate 52 extends as a circular segment about axis 40, so that upon completion of packer closure, the merged segments 67 form a circle, and the merged segments 68 form a circle, for stability and strength.
  • top plates 44 and/or of bottom plates 52 Upon interengagement of top plates 44 and/or of bottom plates 52, continued upward travel of piston against the elastomeric packer periphery assures inward displacement of the inserts 32 relative to inserts 30, as required, to advance the wedge shaped top plates 45 toward edge to edge engagement with plates 44, and wedge shaped bottom plates 53 toward edge-to-edge engagement with plates 52, providing a stable, interlocked insert structure to anchor the elastomeric material against pull-away under the tremendous well fluid pressures exerted on the packer.
  • top and bottom plates protrude from the body 34 of elastomeric material, and that radial grooves 70 and 71 are typically sunk into the material beneath the spaces between successive plates in each row, as is clear from FIGS. 1 and 2.
  • FIG. 6a shows PACKER UNIT 1 in another mode of closure, wherein pipe 19a is a larger diameter than pipe 19.
  • the opposite sides 49 of plates 51 do not come into engagement with the opposite sides 48 of plates 50; rather, plates 51 approach toward interfitting engagement with plates 50, and elastomeric or rubber material 34 may extrude into the spaces 200 between the sides 48 and 49 of the plates if constricting pressure is sufficiently great.
  • the plate sides 48 and 49 may taper away from the mass of body 34, so'
  • Bottom plates may be similarly formed.
  • the inserts and 81 correspond generally to inserts 30 and 32, respectively, with webs 82 and 83 embedded in elastomeric annular body 84.
  • Top plates 85 and 86 correspond to top plates 50 and 51, respectively. In fact 86 and 51 may be identical.
  • the radially inward opposite side extents of the plates 85 have dovetail interfit, as for example is illustrated in FIG. 12 by interfit of the tongue 85a (protruding from plate side 87) into the recess 88 (formed in side 89).
  • plates 85 become interlocked in mutually supported relation.
  • theinserts 90 and 91 correspond generally to inserts 30 and 32, respectively, with webs 92 and 93 embedded in elastomeric annular body 94.
  • Top plates 95 and 96 correspond to top plates 50 and 51, respectively.
  • the radially inward opposite side extents of the plates 95 have overlapping relation in one direction about packer axis 40, when the packer inserts are radially inwardly displaced to maximum extent, thus, for example, the inward side extents 95a of the plates 95 overlap the beveled opposited side extents 97 of adjacent plates 95, locking those plates in mutually supported relation.
  • Bottom plates may have configurations like the top plates.
  • the inserts 100 and 101 correspond generally to inserts 30 and 32, respectively, with webs 102 and 103 embedded in elastomeric body 104.
  • Top plates 105 and 106 correspond to top plates 50 and 51, respectively.
  • the radially inwardly directed opposite sides 107 and 108 of the plates 105 are substantially parallel throughout the major length of said sides; i.e., only the innermost edges 109 and 110 of those sides are rounded, inwardly of interengaged plate corners at 111.
  • Bottom plates, not shown, may have configuration like those of the top plates.
  • the inserts and 121 correspond generally to inserts 30 and 32, respectively, with webs 122 and 123 embedded in elastomeric body 124.
  • Top plates 125 and 126 correspond respectively to top plates 50 and 51.
  • plates 121 have inwardly facing shoulders 127 on wings 128 which closely circumferentially overlap radially outwardly facing shoulders or extents 129 of plates 125, in response to compressive displacement of the packer, as seen in FIG. 17. This condition occures simultaneously with interengagement of opposite side shoulders 130 on plates 126 with opposite side shoulder 131 on plates 125.
  • Bottom plates may have configurations like those of the top plates.
  • the packer elastomeric annular body 146 embeds webs 137 and 140 as shown, and is downwardly grooved between the plates. Bottom plates, not shown, may have configurations like those of the top plates.
  • the inserts 150 and 151 have respective wedge shaped top plates 152 and 153 integral with webs 154 and 155.
  • the webs are circularly spaced about axis 41), with the spacing between certain webs (154 and 155, for example) being greater than the circular spacing between other webs (155 for example), in common circles about that axis.
  • plates 152 are circumferentially larger than plates 153, and that two of the latter are located between successive larger plates 152.
  • Bottom plates integral with the webs may have configurations like the top plates.
  • the inserts 160 and 161 also have respective wedge shaped top plates 162 and 163 integral with webs 164 and 165.
  • the webs are circularly. spaced about axis 411, with the circular spacing between certain webs (16 1 for example) larger than the circular spacing between other webs (webs 164 and 165, for example), in common circles about that axis.
  • plates 162 are circumferentially larger than plates 163, for example, and that two of the larger plates 162 are located between successive smaller plates.
  • the webs extend in or define axial radial planes (as at 164a) which the circumferentially offset from axial radial planes (as at 162a) which bisect the plates and in such relationship that the angle a between planes 164a exceeds the angle B between planes 162a.
  • more elastomeric material of body 166 flows radially inwardly in the larger angular gap between the webs 164 (to produce larger folds 167) than flows inwardly in the smaller angular gap A between webs 164 and 165 (produce smaller folds 168), and less net strain of the total material ensues than if the webs were all equally spaced apart circumferentially.
  • Bottom plates integral with the webs may have configurations like the top plates.
  • modified inserts a and 32a are like inserts 3t) and 32, respectively; however, plates 4 1a (corresponding to plates 44) carry stop shoulders 120 adapted to engage annular shoulder structure 121 on the housing cap 11a; and, plates 45a (corresponding to plates 45) carry stop shoulders 122 also adapted to engage annular shoulder structure 121. None of the stop shoulders 121) and 122 engage fixed shoulder structure 121 when the packer is open as seen in FIG. 26; however, when the packer is partly closed, as in FIG. 27, shoulders on plates 44a engage shoulder structure 121 limiting further inward displacement of inserts 30a, while shoulders 122 are not yet engaged against shoulder structure 121. This condition may for example correspond to FIG. 6a, as described above.
  • inserts 32a move inwardly until shoulders 122 engage shoulder structure 121, as seen in FIG. 28, after which the packer rubber external to the inserts 32a may be even further inwardly displaced to cause seal off against the pipe 19 with greater pressure, the webs 31 and 33 acting as fixed anchors for such rubber.
  • inserts 30b and 32b correspond to inserts 30 and 32, respectively, excepting that inner edge portions of webs 31b associated with inserts 30b are located further from axis 40 than the inner edge portions 7 of webs 33b associated with inserts 32b.
  • This is opposite from the construction of FIG..2 and FIG. 3.
  • the folds of rubber being extruded inwardly toward the pipe 19 have convex forward edges 141 with cusps 142 proximate the interengaged edges 47b of plates 44b; further, while this will produce folds of extruded rubber similar to those of FIGS. 4 and 5, the location of the cusps of FIG.
  • the inserts and 181 have respective wedge shaped top plates 182 and 183 integralwith webs 16 1 and 155. Note that all plates 182 and 153 are alike in size dimension. Also, the webs are circularly spaced about axis 410, with the circular spacing ll: between certain webs (184 and 185 in clockwise sequence) being larger than the circular spacing 0 between other webs (155 and 184 in clockwise sequence), in common circles about that axis.
  • the webs extend in or define axial radial planes (as in 185a) which are circumferentially offset clockwise from axial radial planes 183a which bisect plates 183; and, in inserts 181), the webs extend in or define axial planes (as at 1841a) which are circumferentially offset counterclockwise from axial radial planes 182a which bisect plates 182.
  • Bottom plates may have configurations like the top plates.
  • an annular blowout preventer packer unit having a longitudinal axis, the packer adapted to be com pressively displaced radially inwardly toward said axis, the combination comprising a. metallic inserts generally circularly spaced about said axis, the inserts having webs that extends gen- 9 erally longitudinally, and
  • each of said certain plates has circularly spaced opposite sides that are generally parallel and extend generally inwardly toward the center region of the packer.
  • each of said other plates has circularly spaced opposite sides that taper inwardly toward the center region of the packer.
  • the packer of claim 1 including a housing confining the packer, and a piston in the housing and having an annular fructo-conical surface engageable with the packer to constrict same.
  • the packer of claim 31 including shoulders positioned on at least some of the inserts to engage stop shoulder means on the housing in response to said inward compressive displacement of the packer to limit such inward displacement.
  • the packer of claim 4 including a housing confining the packer and a means movable in the housing to compressively displace the packer inwardly toward said axis, there being shoulders on certain inserts defining said certain webs to engage stop shoulder structure on the housing in response to said inward compressive displacement of the packer to limit such inward displacement of said certain inserts.
  • the packer of claim 33 including shoulders on other inserts defining said other webs to engage stop shoulder structure on the housing is response to said inward compressive displacement of the packer to limit such inward displacement of said other inserts following limiting of said inward displacement of said certain inserts.
  • 35. The packer of claim 7 wherein the webs have inner edge portions, the inner edge portions of certain webs integral with said certain plates being located closer to said axis than the inner edge portions of other webs integral with said other plates, in planes normal to said axis.
  • packer comprising an elastomeric body carrying the in-. serts and adapted to be compressively displaced radi ally inwardly toward said axis
  • each of certain inserts comprising a. top and bottom plates and a generally longitudi serts and adapted to be compressively displaced radi ally inwardly toward said axis
  • each of certain inserts comprising a. top and bottom plates and a generally longitudinally extending web interconnecting said plates

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  • 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)
  • Gasket Seals (AREA)
  • Catching Or Destruction (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
US483311A 1974-06-26 1974-06-26 Controlled closing pattern packing unit for blowout preventer Expired - Lifetime US3917293A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US483311A US3917293A (en) 1974-06-26 1974-06-26 Controlled closing pattern packing unit for blowout preventer
US05/552,859 US3958808A (en) 1974-06-26 1975-02-25 Controlled closing pattern packing unit for blowout preventer
FR7519112A FR2276453A1 (fr) 1974-06-26 1975-06-18 Garniture d'obturateur anti-eruption pour puits de petrole
CA229,609A CA1023659A (fr) 1974-06-26 1975-06-18 Obturateur a fermeture controlee pour dispositif anti-eruption
DE2528102A DE2528102C3 (de) 1974-06-26 1975-06-20 Dichtungseinheit für Ausblaspreventer
GB10592/77A GB1512658A (en) 1974-06-26 1975-06-24 Metallic inserts for use in an annular well blowout preventer packer unit
GB26790/75A GB1512657A (en) 1974-06-26 1975-06-24 Packer unit for well blowout preventer
CA280,305A CA1033661A (fr) 1974-06-26 1977-06-10 Garnitures metalliques pour obturateur anti-eruption de puits de petrole
CA280,303A CA1036930A (fr) 1974-06-26 1977-06-10 Methode d'obturation d'un puits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US483311A US3917293A (en) 1974-06-26 1974-06-26 Controlled closing pattern packing unit for blowout preventer

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Application Number Title Priority Date Filing Date
US05/552,859 Division US3958808A (en) 1974-06-26 1975-02-25 Controlled closing pattern packing unit for blowout preventer

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US3917293A true US3917293A (en) 1975-11-04

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US483311A Expired - Lifetime US3917293A (en) 1974-06-26 1974-06-26 Controlled closing pattern packing unit for blowout preventer

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US (1) US3917293A (fr)
CA (1) CA1023659A (fr)
DE (1) DE2528102C3 (fr)
FR (1) FR2276453A1 (fr)
GB (2) GB1512657A (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508537A1 (fr) * 1981-06-25 1982-12-31 Hydril Co Obturateur anti-eruption de puits, packer a y utiliser et piece metallique rapportee
US4447037A (en) * 1981-06-25 1984-05-08 Hydril Company Well blowout preventer, and packing element
US4452421A (en) * 1981-06-25 1984-06-05 Hydril Company Well blowout preventer, and packing element
WO1984004130A1 (fr) * 1983-04-18 1984-10-25 Hydril Co Unite d'anneau de garnissage et piece rapportee
US4605195A (en) * 1985-05-01 1986-08-12 Hydril Company Annular blowout preventer packing unit
US4657263A (en) * 1983-04-18 1987-04-14 Hydril Company Annular packing unit and insert
US6367804B1 (en) 2000-04-14 2002-04-09 Cooper Cameron Corporation Variable bore ram packer for tapered tubular members in a ram type blowout preventer
WO2004013458A1 (fr) 2002-08-01 2004-02-12 Cooper Cameron Corporation Insert compact pour ensemble de garnitures d'etancheite de verin a alesage variable
US20040079909A1 (en) * 2002-10-23 2004-04-29 Cooper Cameron Corporation Side retainer plate for variable bore ram packer for a ram type blowout preventer
US20050006087A1 (en) * 2003-07-11 2005-01-13 Melancon Jeffrey T. Variable bore ram
US6955357B2 (en) 2002-10-07 2005-10-18 Cooper Cameron Corporation Extended range variable bore ram packer for a ram type blowout preventer
US20100116504A1 (en) * 2008-11-11 2010-05-13 Corey Eugene Hoffman Casing annulus tester for diagnostics and testing of a wellbore
CN102767620A (zh) * 2011-05-05 2012-11-07 国民油井华高英国有限公司 密封件
US8978751B2 (en) 2011-03-09 2015-03-17 National Oilwell Varco, L.P. Method and apparatus for sealing a wellbore
US20160222749A1 (en) * 2013-08-27 2016-08-04 Enovate Systems Limited Improved annular blow out preventer
US20170145771A1 (en) * 2015-11-24 2017-05-25 Cameron International Corporation Packer Assembly with Multiple Different Inserts for Blowout Preventer
US20180066492A1 (en) * 2016-09-08 2018-03-08 Cameron International Corporation Blowout preventer systems and methods
US10087700B2 (en) * 2014-06-11 2018-10-02 Axon Pressure Products, Inc. Multi-cavity blowout preventer
US20190330954A1 (en) * 2016-02-19 2019-10-31 Oil States Industries (Uk) Limited Wear indicator for a joint between a riser and a floating platform
US11066891B2 (en) * 2018-08-31 2021-07-20 Nexus Energy Technologies Inc. Ram block inner seal assembly and seal therefore
CN113510902A (zh) * 2021-09-14 2021-10-19 四川新为橡塑有限公司 一种旋转胶芯及其注塑用模具

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098516A (en) * 1977-08-15 1978-07-04 Hydril Company Blowout preventer packing unit with slanted reinforcing inserts
US7832485B2 (en) 2007-06-08 2010-11-16 Schlumberger Technology Corporation Riserless deployment system
US9938793B2 (en) 2015-11-24 2018-04-10 Freudenberg Oil & Gas, Llc Spherical blow out preventer annular seal

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Publication number Priority date Publication date Assignee Title
US3228703A (en) * 1962-11-05 1966-01-11 James A Wilson Line stripper and packing element therefor
US3486759A (en) * 1967-08-25 1969-12-30 Hydril Co Sealing of underwater equipment
US3690682A (en) * 1970-05-18 1972-09-12 Dresser Ind High pressure sealing means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228703A (en) * 1962-11-05 1966-01-11 James A Wilson Line stripper and packing element therefor
US3486759A (en) * 1967-08-25 1969-12-30 Hydril Co Sealing of underwater equipment
US3690682A (en) * 1970-05-18 1972-09-12 Dresser Ind High pressure sealing means

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508537A1 (fr) * 1981-06-25 1982-12-31 Hydril Co Obturateur anti-eruption de puits, packer a y utiliser et piece metallique rapportee
US4447037A (en) * 1981-06-25 1984-05-08 Hydril Company Well blowout preventer, and packing element
US4452421A (en) * 1981-06-25 1984-06-05 Hydril Company Well blowout preventer, and packing element
US4461448A (en) * 1981-06-25 1984-07-24 Hydril Company Well blowout preventer, and packing element
US4657263A (en) * 1983-04-18 1987-04-14 Hydril Company Annular packing unit and insert
WO1984004130A1 (fr) * 1983-04-18 1984-10-25 Hydril Co Unite d'anneau de garnissage et piece rapportee
US4605195A (en) * 1985-05-01 1986-08-12 Hydril Company Annular blowout preventer packing unit
US6367804B1 (en) 2000-04-14 2002-04-09 Cooper Cameron Corporation Variable bore ram packer for tapered tubular members in a ram type blowout preventer
WO2004013458A1 (fr) 2002-08-01 2004-02-12 Cooper Cameron Corporation Insert compact pour ensemble de garnitures d'etancheite de verin a alesage variable
US6955357B2 (en) 2002-10-07 2005-10-18 Cooper Cameron Corporation Extended range variable bore ram packer for a ram type blowout preventer
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Also Published As

Publication number Publication date
DE2528102C3 (de) 1980-09-25
GB1512657A (en) 1978-06-01
GB1512658A (en) 1978-06-01
DE2528102A1 (de) 1976-01-15
CA1023659A (fr) 1978-01-03
DE2528102B2 (de) 1980-01-31
FR2276453A1 (fr) 1976-01-23
FR2276453B1 (fr) 1982-11-19

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