EP0489188B1 - Unit for making-up and breaking out annular blow out preventers of threaded type - Google Patents

Unit for making-up and breaking out annular blow out preventers of threaded type Download PDF

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Publication number
EP0489188B1
EP0489188B1 EP90123286A EP90123286A EP0489188B1 EP 0489188 B1 EP0489188 B1 EP 0489188B1 EP 90123286 A EP90123286 A EP 90123286A EP 90123286 A EP90123286 A EP 90123286A EP 0489188 B1 EP0489188 B1 EP 0489188B1
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EP
European Patent Office
Prior art keywords
winch
safety plug
supporting arm
safety
guide
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 - Lifetime
Application number
EP90123286A
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German (de)
French (fr)
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EP0489188A1 (en
Inventor
Said Barr
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.)
ENTREPRISE NATIONALE DES TRAVAUX AUX PUITS ENTP
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ENTREPRISE NATIONALE DES TRAVAUX AUX PUITS ENTP
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Publication date
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Priority to EP90123286A priority Critical patent/EP0489188B1/en
Priority to AT90123286T priority patent/ATE108510T1/en
Priority to DE69010689T priority patent/DE69010689D1/en
Publication of EP0489188A1 publication Critical patent/EP0489188A1/en
Application granted granted Critical
Publication of EP0489188B1 publication Critical patent/EP0489188B1/en
Anticipated expiration legal-status Critical
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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
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints

Definitions

  • the invention relates to a device for unlocking and blocking annular safety shutters (B.O.P.) for wellbore.
  • Document US-A-4 398 598 describes a device for loosening an annular shutter comprising a frame connectable to the shutter and two jacks linked in an articulated manner on the one hand to an upper plate capable of being fixed on the head of the shutter and on the other hand to the frame so that the actuation of the cylinders biases the head of the shutter.
  • the device is not designed for a tightening operation
  • the object of the invention is to create a device for loosening and tightening well shutter blocks guaranteeing maximum work safety and at the same time allowing significant time savings.
  • the invention relates to a device according to claim 1 appended.
  • the jacks are arranged essentially parallel to the jack-carrying arm and linked to the latter in an articulated manner by hinges;
  • the base plate can be secured to a platform carrying a connector for the central guide; on its underside, the base plate can be provided with support legs and a stiffening frame.
  • the device according to the invention allows a significant reduction in the working time necessary for loosening or tightening the well shutter block. At the same time, the risk of accident and damage to the equipment used is reduced.
  • Another advantage of the invention resides in the fact that it is no longer necessary to assemble on site the loosening device and tightening of the well shutter block, but that it is transportable and can be mounted for example on another borehole sleeve.
  • the seat frame 10 shown in FIGS. 1, 1a and 1b is composed of a base plate 11 secured to a platform 11a.
  • the base plate 11 is reinforced, on its underside, by a stiffening frame 14 and provided with support legs 13. With a view to increasing the bearing surface of the support legs 13, these are provided, at their free ends, of support plates 13a.
  • a male slide 12 is arranged in a substantially vertical manner.
  • the slide 12 consists of a double T profile held in position by a lateral spacer 12a.
  • the platform 11a secured to the base plate 11 is substantially circular in shape and provided, in the center, with a connector 15.
  • the connector 15 is provided with a thread 15a into which the tubular central guide shown in detail in Figures 2 and 2a can be screwed.
  • the guide 16 comprises an envelope 16a enclosing an inner tube 17.
  • the free lower end of the inner tube 17 is provided with a male thread 17a capable of cooperating with the female thread 15a of the connector 15.
  • the upper plate 19 ( Figures 3, 3a) is provided with a central coupling bore 21. Reservations 20 are provided concentrically with the central coupling bore 21, these housing bores being reinforced by reinforcement flanges 20a.
  • a guide pin 26, integral with a jack-carrying arm 22 shown in Figures 4 and 4a can be introduced to cooperate with said bore.
  • the arm 22 has a longitudinal extent covering almost the total length of the base plate 11, up to the area of the platform 11a and forms with the slide 12 a bracket.
  • the guide pin 26 is fixed at a free end of the arm 22 to the underside of the latter.
  • the free end of the arm 22 opposite the guide pin 26 is provided with a head element 22a in which is provided a female slide 24 covered by a slide flange 23.
  • the female slide 24 is also formed in double T.
  • connection eyelets 27 are provided, as shown in FIG. 5, with hinge articulation bores 34a corresponding to the hinge articulation bores 34 in the connection eyelets.
  • the jacks 29 are provided with connecting rods 32 provided at their free ends with jack heads 30. At their lower faces, these jack heads 30 are provided with shoes 35 which can be brought into action relationship with the reservations 20 in the upper plate 19.
  • the operation of the device which has just been described is indicated in the following: to block or unblock a safety shutter, the shutter is fixed on the base plate 11 comprising the slide 12, on which is positioned at the desired height the arm 22 by its slide 24. The height is chosen according to the height of the well shutter block 16 to be introduced.
  • the upper plate 19 On the shutter, the upper plate 19 is placed, which by means of coupling fittings is fixed to the shutter.
  • the guide pin 26 provided on the underside of the arm 22 engages in the central bore 21 of the upper plate 19 of which it guarantees the concentricity.
  • the hydraulic drive jacks 29 arranged parallel to the arm 22 engage, with their shoes 35, in the reservations 20 of the plate 19. By means of opposite forces deployed by the jacks 29 and acting one in traction, l 'other in compression, the plate 19 and, with it the well shutter can be rotated by about half a turn, so as to loosen or tighten it.
  • the cylinders 29 can follow the pivoting movement of the plate 19 and of the reservations 20 in the latter.
  • the shutter can be loosened or tightened without endangering the personnel performing the operation.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Multiple-Way Valves (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

A baseplate (1 in Figure 1), which is adjustable as a function of the different diameters of blow-out preventer flanges and to which a "slide" fixed point is welded, serves as support for the system as a whole. The blow-out preventer is fastened to (1 in Figure 1) by means of four bolts. Into it is introduced the interchangeable guide (2 in Figure 1) screwed to (5 in Figure 1). By means of a fastening mechanism (3 in Figure 2) on the head of the blow-out preventer are seated the shoes of the hydraulic jacks (6 in Figure 2) which are themselves mounted on oscillating hinges (4 in Figure 2). As a function of the height of the various blow-out preventers, the jack carrier (4 in Figure 2) is adjusted along the male slide (1 in Figure 1). The element (5 in Figure 1) intended for the centring and fastening of (2 in Figure 1) is welded on. <IMAGE>

Description

L'invention a pour objet un dispositif pour débloquer et bloquer les obturateurs de sécurité annulaires (B.O.P.) pour puits de forage.The invention relates to a device for unlocking and blocking annular safety shutters (B.O.P.) for wellbore.

Les dispositifs de blocage traditionnels présentent normalement un risque élevé d'accident menaçant la main-d'oeuvre occupée à bloquer les puits, étant donné que la rupture d'un câble, le surmenage d une poulie ou la rupture d'une corde de traction peuvent bien se produire.Conventional blocking devices normally present a high risk of accident threatening the workforce engaged in blocking the wells, since the breaking of a cable, overworking of a pulley or the breaking of a traction rope may well happen.

Les dispositifs de blocage conventionnels et connus sont normalement fixés immédiatement sur la tour de forage. A cette fin, une plaque est fixée sur la tête de l'obturateur, tandis qu'une tige de forage munie d'un élément de raccord est liée par soudure à ladite plaque. Cet ensemble est suspendu à l'aide d'un palan ou d'une grue et serré ou desserré à l'aide d'une clé à main de forage. Cependant, ce système présente le désavantage que lorsque l'obturateur est du type à collier celui-ci risque d'être entraîné en rotation de sorte que les joints toriques peuvent être endommagés; lorsque l'obturateur est muni de brides ou de goujons, il existe le risque que les soudures se cassent ou celui d'un dévissage au droit de la tête de tubage ("casing head") d'où endommagement des cales d'ancrage de tubage et de leur étanchéité.Conventional and known blocking devices are normally fixed immediately on the drilling tower. To this end, a plate is fixed to the head of the obturator, while a drill rod provided with a connecting element is connected by welding to said plate. This assembly is suspended using a hoist or crane and tightened or loosened using a drilling hand wrench. However, this system has the disadvantage that when the shutter is of the collar type, it risks being rotated so that the O-rings can be damaged; when the obturator is fitted with flanges or studs, there is a risk that the welds will break or that of unscrewing to the right of the casing head, resulting in damage to the anchoring wedges of casing and their tightness.

En atelier, on a dû prévoir jusqu'ici un point d ancrage convenable en béton armé sur lequel le dispositif de blocage de puits était fixé. Ensuite, un étrier était fixé au dispositif de blocage de puits de sorte que celui-ci puisse être serré ou desserré à l'aide de deux véhicules.In the workshop, a suitable anchor point in reinforced concrete has so far been provided on which the well blocking device was fixed. Then a bracket was attached to the well locking device so that it could be tightened or loosened using two vehicles.

Le document US-A-4 398 598 décrit un dispositifs de desserrage d'un obturateur annulaire de puits comprenant un bâti raccordable à l'obturateur et deux vérins liés de façon articulée d'une part à une plaque supérieure susceptible d'être fixée sur la tête de l'obturateur et d'autre part au bâti de telle sorte que l'actionnement des vérins sollicite en torsion la tête de l'obturateur. Le dispositif n'est pas conçu pour une opération de serrageDocument US-A-4 398 598 describes a device for loosening an annular shutter comprising a frame connectable to the shutter and two jacks linked in an articulated manner on the one hand to an upper plate capable of being fixed on the head of the shutter and on the other hand to the frame so that the actuation of the cylinders biases the head of the shutter. The device is not designed for a tightening operation

L'invention a pour but de créer un dispositif de desserrage et de serrage de blocs-obturateurs de puits garantissant un maximum de sécurité de travail et permettant en même temps une économie de temps sensible.The object of the invention is to create a device for loosening and tightening well shutter blocks guaranteeing maximum work safety and at the same time allowing significant time savings.

A cette fin, l'invention a pour objet un dispositif selon la revendication 1 annexée.To this end, the invention relates to a device according to claim 1 appended.

Selon des caractéristiques avantageuses, les vérins sont disposés essentiellement parallèlement au bras porte-vérins et liés à celui-ci de manière articulée par des charnières; la plaque de base peut être solidaire d'une plate-forme portant un raccord pour le guide central; à sa face inférieure, la plaque de base peut être munie de jambes de soutien et d'un cadre de raidissement.According to advantageous characteristics, the jacks are arranged essentially parallel to the jack-carrying arm and linked to the latter in an articulated manner by hinges; the base plate can be secured to a platform carrying a connector for the central guide; on its underside, the base plate can be provided with support legs and a stiffening frame.

Le dispositif selon l'invention permet une réduction sensible du temps de travail nécessaire au desserrage ou au serrage du bloc-obturateur de puits. En même temps, les risques d'accident et d'endommagement du matériel utilisé sont réduits. Un autre avantage de l'invention réside dans le fait qu'il n'est plus nécessaire d assembler sur site le dispositif de desserrage et de serrage du bloc-obturateur de puits, mais que celui-ci est transportable et peut être monté par exemple sur un autre manchon de sondage.The device according to the invention allows a significant reduction in the working time necessary for loosening or tightening the well shutter block. At the same time, the risk of accident and damage to the equipment used is reduced. Another advantage of the invention resides in the fact that it is no longer necessary to assemble on site the loosening device and tightening of the well shutter block, but that it is transportable and can be mounted for example on another borehole sleeve.

D'autres dispositions avantageuses sont décrites dans les revendications dépendantes. Un mode d'exécution d'un dispositif selon l'invention est représenté, dans les dessins ci- inclus, et décrit ci-après de manière plus détaillée; sont représentés dans la

figure 1:
l'élévation d'un bâti d'assise comprenant une plaque de base à laquelle est associée une plate-forme, une glissière de support montée sensiblement de façon perpendiculaire à ladite plaque de base et des jambes de soutien dudit bâti;
figure 1a:
le plan du bâti selon la figure 1;
figure 1b:
la coupe du bâti selon les figures 1 et 1a;
figure 2:
l'élévation d'un guide central tubulaire;
figure 2a:
la coupe du guide central selon la figure 2;
figure 3:
le plan d'une plaque supérieure pour un dispositif selon l'invention;
figure 3a:
l'élévation de la plaque supérieure selon la figure 3;
figure 4:
l'élévation d'un bras porte-vérins dans un dispositif selon l'invention, avec un goujon de guidage;
figure 4a:
le plan d'un bras porte-vérins selon la figure 4, avec des vérins hydrauliques latéraux;
figure 5:
la vue éclatée du bras porte-vérins selon les figures 3 et 4, avec les vérins hydrauliques associés et la plaque supérieure;
figure 6:
la vue isométrique d'un bâti d'assise selon la figure 1, avec plaque de base, glissière de support et plate-forme, et avec le guide central associé.
Other advantageous arrangements are described in the dependent claims. An embodiment of a device according to the invention is shown in the accompanying drawings, and described below in more detail; are represented in the
figure 1:
the elevation of a seat frame comprising a base plate with which is associated a platform, a support slide mounted substantially perpendicularly to said base plate and support legs of said frame;
Figure 1a:
the plan of the frame according to Figure 1;
Figure 1b:
the section of the frame according to Figures 1 and 1a;
figure 2:
the elevation of a central tubular guide;
Figure 2a:
the section of the central guide according to Figure 2;
figure 3:
the plane of an upper plate for a device according to the invention;
Figure 3a:
the elevation of the upper plate according to Figure 3;
figure 4:
the elevation of an actuator arm in a device according to the invention, with a guide stud;
Figure 4a:
the plane of a jacking arm according to FIG. 4, with lateral hydraulic jacks;
figure 5:
the exploded view of the jack-carrying arm according to FIGS. 3 and 4, with the associated hydraulic jacks and the upper plate;
figure 6:
the isometric view of a seat frame according to FIG. 1, with base plate, support slide and platform, and with the associated central guide.

Le bâti d'assise 10 représenté dans les figure 1, 1a et 1b est composé d'une plaque de base 11 solidaire d'une plate-forme 11a. La plaque de base 11 est renforcée, à sa face inférieure, par un cadre de raidissement 14 et munie de jambes de soutien 13. En vue d'augmenter la surface d'appui des jambes de soutien 13, celles- ci sont munies, à leurs extrémités libres, de plaques d'appui 13a.The seat frame 10 shown in FIGS. 1, 1a and 1b is composed of a base plate 11 secured to a platform 11a. The base plate 11 is reinforced, on its underside, by a stiffening frame 14 and provided with support legs 13. With a view to increasing the bearing surface of the support legs 13, these are provided, at their free ends, of support plates 13a.

Sur la face supérieure de la plaque de base 11 et à son extrémité opposée à la plate-forme 11a, est disposée une glissière mâle 12 de façon sensiblement verticale. La glissière 12 consiste en un profilé en double T tenu en position par une entretoise latérale 12a.On the upper face of the base plate 11 and at its end opposite to the platform 11a, a male slide 12 is arranged in a substantially vertical manner. The slide 12 consists of a double T profile held in position by a lateral spacer 12a.

La plate-forme 11a solidaire de la plaque de base 11 est sensiblement de forme circulaire et munie, au centre, d'un raccord 15.The platform 11a secured to the base plate 11 is substantially circular in shape and provided, in the center, with a connector 15.

Le raccord 15 est muni d'un filetage 15a dans lequel on peut visser le guide central tubulaire représenté de manière détaillée dans les figures 2 et 2a. Le guide 16 comporte une enveloppe 16a renfermant un tube intérieur 17. L'extrémité inférieure libre du tube intérieur 17 est munie d'un filetage mâle 17a susceptible de coopérer avec le filetage femelle 15a du raccord 15.The connector 15 is provided with a thread 15a into which the tubular central guide shown in detail in Figures 2 and 2a can be screwed. The guide 16 comprises an envelope 16a enclosing an inner tube 17. The free lower end of the inner tube 17 is provided with a male thread 17a capable of cooperating with the female thread 15a of the connector 15.

La plaque supérieure 19 (figures 3, 3a) est pourvue d'un alésage d'accouplement 21 central. Des réservations 20 sont prévues concentriquement à l'alésage d'accouplement 21 central, ces alésages de logement étant renforcés par des brides de renforcement 20a.The upper plate 19 (Figures 3, 3a) is provided with a central coupling bore 21. Reservations 20 are provided concentrically with the central coupling bore 21, these housing bores being reinforced by reinforcement flanges 20a.

Dans l'alésage d'accouplement 21 central de la plaque supérieure 19, un goujon de guidage 26, solidaire d'un bras porte-vérins 22 représenté dans les figures 4 et 4a peut être introduit pour coopérer avec ledit alésage. Le bras 22 présente une étendue longitudinale couvrant presque la longueur totale de la plaque de base 11, jusque dans le domaine de la plate-forme 11a et forme avec la glissière 12 une potence.In the central coupling bore 21 of the upper plate 19, a guide pin 26, integral with a jack-carrying arm 22 shown in Figures 4 and 4a can be introduced to cooperate with said bore. The arm 22 has a longitudinal extent covering almost the total length of the base plate 11, up to the area of the platform 11a and forms with the slide 12 a bracket.

Le goujon de guidage 26 est fixé à une extrémité libre du bras 22 à la face inférieure de celui-ci. L'extrémité libre du bras 22 opposée au goujon de guidage 26 est munie d'un élément de tête 22a dans lequel est prévue une glissière femelle 24 couverte par une bride de glissière 23. En conformité avec la glissière mâle 12, la glissière femelle 24 est également formée en double T. Par cette glissière 24, le bras 22 est guidé sur la glissière de support 12, de sorte qu'il peut être ajusté convenablement en hauteur. En vue du blocage du bras 22 à la hauteur souhaitée, des coulisseaux latéraux 25 sont associés à la glissière femelle 24.The guide pin 26 is fixed at a free end of the arm 22 to the underside of the latter. The free end of the arm 22 opposite the guide pin 26 is provided with a head element 22a in which is provided a female slide 24 covered by a slide flange 23. In accordance with the male slide 12, the female slide 24 is also formed in double T. By this slide 24, the arm 22 is guided on the support slide 12, so that it can be adjusted properly in height. With a view to locking the arm 22 at the desired height, lateral slides 25 are associated with the female slide 24.

Des deux côtés du bras 22 et parallèlement à son étendue longitudinale, on dispose des vérins 29 liés, par l'intermédiaire d'accouplements de vérin 28, à l'élément de tête 22a. A cette fin, l'élément de tête 22a est muni d'oeillets de raccord 27 dans lesquels les accouplements de vérin sont logés de manière pivotable. A cette fin, les oeillets de raccord 27 sont munis, comme le montre la figure 5, d'alésages d'articulation à charnière 34a correspondant aux alésages d'articulation à charnière 34 dans les oeillets de raccord.On both sides of the arm 22 and parallel to its longitudinal extent, there are jacks 29 connected, by means of jack couplings 28, to the head element 22a. To this end, the head element 22a is provided with connection eyelets 27 in which the jack couplings are pivotally housed. To this end, the connection eyelets 27 are provided, as shown in FIG. 5, with hinge articulation bores 34a corresponding to the hinge articulation bores 34 in the connection eyelets.

Comme également représenté dans la figure 5, les vérins 29 sont munis de bielles 32 pourvues à leurs extrémités libres de têtes de vérin 30. A leurs faces inférieures, ces têtes de vérin 30 sont munies de sabots 35 pouvant être mis en rapport d'action avec les réservations 20 dans la plaque supérieure 19. Le fonctionnement du dispositif qui vient d'être décrit est indiqué dans ce qui suit: pour bloquer ou débloquer un obturateur de sécurite, on fixe l'obturateur sur la plaque de base 11 comportant la glissière 12, sur laquelle est positionné à la hauteur voulue le bras 22 par sa glissière 24. La hauteur est choisie en fonction de la hauteur du bloc-obturateur de puits 16 devant être introduit.As also shown in FIG. 5, the jacks 29 are provided with connecting rods 32 provided at their free ends with jack heads 30. At their lower faces, these jack heads 30 are provided with shoes 35 which can be brought into action relationship with the reservations 20 in the upper plate 19. The operation of the device which has just been described is indicated in the following: to block or unblock a safety shutter, the shutter is fixed on the base plate 11 comprising the slide 12, on which is positioned at the desired height the arm 22 by its slide 24. The height is chosen according to the height of the well shutter block 16 to be introduced.

Sur l'obturateur, la plaque supérieure 19 est placée, laquelle par l'intermédiaire de raccords d'accouplement est fixée sur l'obturateur. Le goujon de guidage 26 prévu à la face inférieure du bras 22 s'engage dans l'alésage central 21 de la plaque supérieure 19 dont il garantit la concentricité. Les vérins 29 à entraînement hydraulique disposés parallèlement au bras 22 s'engagent, avec leurs sabots 35, dans les réservations 20 de la plaque 19. A l'aide de forces opposées déployées par les vérins 29 et agissant l'une en traction, l'autre en compression, la plaque 19 et, avec elle l'obturateur de puits peuvent être tournés d'un demi- tour environ, de sorte à desserrer ou serrer celui-ci. Pendant cette opération, grâce à l'accouplement articulé des vérins 29 à l'élément de tête 22a par l'intermédiaire des oeillets de raccord 27 et les accouplements de vérin 28, les vérins 29 peuvent suivre le mouvement pivotant de la plaque 19 et des réservations 20 dans ce dernier. Ainsi, l'obturateur peut être desserré ou serré sans mettre en danger le personnel effectuant l'opération. Symboles de référence 10 le bâti d'assise 20a bride de renforce ment 11 plaque de base 21 alésage d'accouple ment 11a plate-forme 22 bras 12 glissière 22a élément de tête 12a entretoise 23 bride de glissière 13 jambe de soutien 24 glissière femelle 13a plaque d'appui 25 coulisseau 14 cadre de raidisse ment 26 goujon de guidage 15 raccord 27 oeillet de raccord 15a filetage femelle 28 accouplement 16 guide central 29 vérin 16a enveloppe 30 tête de vérin 17 tube intérieur 32 bielle 17a filetage mâle 33 bride de vérin 19 plaque supérieure 34 alésage d'articula tion à charnière 20 réservations 34a alésage d'articula tion à charnière 35 sabot On the shutter, the upper plate 19 is placed, which by means of coupling fittings is fixed to the shutter. The guide pin 26 provided on the underside of the arm 22 engages in the central bore 21 of the upper plate 19 of which it guarantees the concentricity. The hydraulic drive jacks 29 arranged parallel to the arm 22 engage, with their shoes 35, in the reservations 20 of the plate 19. By means of opposite forces deployed by the jacks 29 and acting one in traction, l 'other in compression, the plate 19 and, with it the well shutter can be rotated by about half a turn, so as to loosen or tighten it. During this operation, thanks to the articulated coupling of the cylinders 29 to the head element 22a by means of the connection eyelets 27 and the cylinder couplings 28, the cylinders 29 can follow the pivoting movement of the plate 19 and of the reservations 20 in the latter. Thus, the shutter can be loosened or tightened without endangering the personnel performing the operation. Reference symbols 10 the seat frame 20a reinforcement flange 11 base plate 21 coupling bore 11a platform 22 arms 12 slide 22a head element 12a spacer 23 slide flange 13 support leg 24 female slide 13a backing plate 25 slide 14 stiffening frame 26 guide stud 15 connection 27 fitting eyelet 15a female thread 28 coupling 16 central guide 29 cylinder 16a envelope 30 cylinder head 17 inner tube 32 connecting rod 17a male thread 33 cylinder flange 19 top plate 34 hinge joint bore 20 reservations 34a hinge joint bore 35 shoe

Claims (8)

  1. Apparatus for tightening and releasing annular well safety plugs, characterized by a ground flange (11) as a supporting structure for safety plug (16), a receiving post (12), a winch supporting arm (22) moving along the receiving post and adapted to be fixed in positions corresponding to the various heights of safety plug (16), a top actuating disc (19) adapted to be attached to the top end of said safety plug (16), a removable tubular central guide member (16) substantially parallel to, and spaced from, receiving post (12), and a pair of winches (20) articulated to said winch supporting arm (22) and in an inserting position relative to top actuating disc (19), said winches (29) being operatively coupled by means of coupling bolts (35) with coupling bores (20) and attached to the aforesaid top actuating disc (19) in a manner that actuation of the aforesaid winches (29) sustains the torquing of the front portion of safety plug (16).
  2. Apparatus as inclaim 1, characterized in that winches (29) are substantially parallel to winch supporting arm (22) and are articulated thereto by means of winch attachments (27, 28).
  3. Apparatus as in claims 1 and 2, characterized in that ground support (11) is a one-piece structure with a safety platform (11a) for fixing safety plug (16) in position and has supporting legs (13) and a reinforcing frame (14) at the bottom thereof.
  4. Apparatus as in claims 1 to 3, characterized by winch supporting arm (22) has a head piece (22a), said head piece (22a) including a guide slot (24) operatively connected with guide jaws (25) of said arm (22) on receiving post (12) being adapted to be raised to, and secured in position at, a suitable height.
  5. Apparatus as in claims 2 to 4, characterized by winch attachments (28) having lugs (27) associated with head piece (22) of winch supporting arm (22).
  6. Apparatus as in claims 1 to 5, characterized in that top actuating disc (19) has a central coupling bore (21) adapted to be cooperatively connected to a guide stud (26) provided at the end of winch supporting arm (22).
  7. Apparatus as in claims 3 to 6, characterized in that safety plug (16) has an inner tube (17) provided with external threads (17a) corresponding to inner threads (15a) of a preventer attachment (15) located on safety platform (11a) of ground flange (11).
  8. Apparatus as in claim 7, characterized by guide stud (26) being designed to precisely fit in inner tube (17) of central safety plug (16).
EP90123286A 1990-12-05 1990-12-05 Unit for making-up and breaking out annular blow out preventers of threaded type Expired - Lifetime EP0489188B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP90123286A EP0489188B1 (en) 1990-12-05 1990-12-05 Unit for making-up and breaking out annular blow out preventers of threaded type
AT90123286T ATE108510T1 (en) 1990-12-05 1990-12-05 TOOL FOR MAKING AND TURNING THE THREADED CONNECTION OF PULLOUT VALVES.
DE69010689T DE69010689D1 (en) 1990-12-05 1990-12-05 Tool for making and turning the threaded connection of breakout valves.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90123286A EP0489188B1 (en) 1990-12-05 1990-12-05 Unit for making-up and breaking out annular blow out preventers of threaded type

Publications (2)

Publication Number Publication Date
EP0489188A1 EP0489188A1 (en) 1992-06-10
EP0489188B1 true EP0489188B1 (en) 1994-07-13

Family

ID=8204793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123286A Expired - Lifetime EP0489188B1 (en) 1990-12-05 1990-12-05 Unit for making-up and breaking out annular blow out preventers of threaded type

Country Status (3)

Country Link
EP (1) EP0489188B1 (en)
AT (1) ATE108510T1 (en)
DE (1) DE69010689D1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398598A (en) * 1981-05-18 1983-08-16 Fabrygel Joe H Break-out tool for annular type blow-out preventers

Also Published As

Publication number Publication date
EP0489188A1 (en) 1992-06-10
ATE108510T1 (en) 1994-07-15
DE69010689D1 (en) 1994-08-18

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