EP0211725B1 - Device for positioning a tool in a drain pipe of a drilled well - Google Patents

Device for positioning a tool in a drain pipe of a drilled well Download PDF

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Publication number
EP0211725B1
EP0211725B1 EP86401523A EP86401523A EP0211725B1 EP 0211725 B1 EP0211725 B1 EP 0211725B1 EP 86401523 A EP86401523 A EP 86401523A EP 86401523 A EP86401523 A EP 86401523A EP 0211725 B1 EP0211725 B1 EP 0211725B1
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EP
European Patent Office
Prior art keywords
tool
assembly
tubes
orientation
head
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Expired
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EP86401523A
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German (de)
French (fr)
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EP0211725A1 (en
Inventor
Hubert Miffre
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Societe Nationale Elf Aquitaine Production SA
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Societe Nationale Elf Aquitaine Production SA
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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/03—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches

Definitions

  • the present invention relates to a device for positioning a tool in a drain of a drilled well and, more particularly of an oil well in production.
  • branched wells constituted by a vertical main well and lateral wells connected to the main well and making with the latter a certain angle, are frequently used, so as in particular to increase the production of the main well or also called well " mother".
  • the lateral ramifications of a mother borehole allow, in addition to the increase in production, to recover as much as possible the content of the exploited deposit.
  • these ramifications make it possible, with the same surface installation, to extend the exploited underground zone, and to reduce the high flow resistance which appears near the borehole in a mother well.
  • Another utility of these ramifications is to be able to exploit layers of land comprising a large number of fractures. This is because the lateral ramifications intercept the fractures and connect them to the drainage system of the mother well.
  • the ramifications were generally carried out, starting from the mother well, by means of a deviating whistle, called whipstock in English. Obviously, the diameters of the branches are smaller than those of the mother well and the angle of deflection of each branch is chosen according to the zone of the deposit where the branch must open. In some cases, to minimize drilling costs, the same diverter whistle is used to drill two symmetrical ramifications with respect to the mother well, by turning the diverter whistle to 1800 in the mother well. Such wells branched by means of deflectors are described in US Patents 4,396,075 and 4,415,205.
  • branches can be oblique, horizontal or in any direction, as long as they are associated with a mother well from which they are made.
  • the second difficulty lies in the fact that supposing that the original branch can be relocated, it would be imperative to use the deflecting whistle again to either free said reactivated branch from all the fillings, or to start drilling again.
  • the device for drilling and for producing oil in a wellbore formed from a mother well and at least at least one branched well opening into said mother well comprises an external tube arranged in the mother well, at least one bypass assembly fixed in situ in said external tube and comprising at least one fixed bypass tube whose lower end communicates with a well branched, a connection assembly which, associated with a positioning assembly, makes it possible to drill and return to service after use, any branching, thanks to a fixed key of the positioning assembly on which a cam profile of the connection assembly.
  • the present invention solves the problem posed by considerably shortening the downtime of a well in the production phase, by proposing a device which makes it possible to position an intervention tool correctly in the drain concerned, without having to reassemble the tube. production.
  • An operation can be measurements to be carried out in said drain during the production phase, such as for example interference measurements, or else a plugging of the drain, during an inflow of water.
  • the intervention tool is pre-oriented on the surface by the correct positioning of the orientation sleeve relative to the lateral drain in which the tool must be lowered.
  • a branched well as shown very diagrammatically in FIG. 1 comprises for example a vertical drain 1 and one or more other lateral drains of which only one 2 is shown.
  • the well comprises an external casing 3 which descends to the bottom of the mother well, a production tube 4, disposed in the external casing 3, a pump 5 lowered in an enlarged part 4a of the production tube to a certain height, said pump 5 being suspended from a string of pumping rods.
  • a receptacle or base part 7 is permanently fixed in the well, for example by cementing or any other fixing means and comprises several bypass tubes each communicating, at their lower end with a drain from the well.
  • the base part 7 comprises as many orifices as there are drains in the well.
  • the base part will include three orifices at 120 °, each of the corresponding orifices and connected to one of the drains.
  • Such a basic part is described for example in the French patent application, recalled above, under the name of a bypass assembly.
  • a connection assembly 8 is integral with the base part 7 and comprises a cam profile which rests on a fixed key 9.
  • the assembly 8 also includes housings 10 for plugs and connection tubes 11 which are introduced in bores 60 formed in the base part 7, so that the tubes 11 communicate through said base part 7, with the drains 1, 2 of the well.
  • An intermediate assembly 12 is fixed to the connection assembly 8 and comprises three intermediate tubes of which only two 13, 14 are shown, and which converge towards the head 15 so as to form, in said head, a single inlet orifice 61 , while each of said tubes opens out at the lower end of said element into one of the tubes of the connection assembly 8.
  • a guide orientation member 16 consists of a hollow jacket 17 comprising a longitudinal slot 18 which is oriented relative to the cam profile of the connection assembly 8 which is itself properly oriented by virtue of the fixed key 9.
  • the orientation member 16 is interposed between the production tube 4 and the intermediate assembly 12, said production tube 4 comprising an extension 4b which is introduced into 1 inlet orifice 61 of the head 15.
  • the entry edges 19 of said slot are flared and their sharp edges are ground so as to allow easy sliding on said edges.
  • an intervention tool 20 comprises a body 21 at the lower end from which emerges a head 22 to which is connected an extension, not shown, of variable length, and which must be introduced into the selected drain where the intervention should take place.
  • the head 22 is mainly housed in the body 21 and pivots about an axis 23 held in position by a locking screw 24.
  • the upper end 25 of the head 22 to the right in FIG. 3 cooperates with a set of links 26 comprising a lever 27 articulated on two axes 28, 29 and a link 30 which is articulated at one end on the axis 29 and at the other end on an axis 31.
  • a rod 32 integral with the assembly of rods 26 is housed in the body 21 and comprises a threaded portion 33 engaging in a nut 34 serving as a support element for one end of a compression spring 35, arranged around said rod 32, and the the other end is supported on a washer 36 fixed to the body 21.
  • the nut 34 is also used for adjusting the tension of the spring 35.
  • the body 21 consists mainly of two lower 37 and upper 38 parts.
  • the upper free end 39 of the lower part 37 is threaded and is provided with three housings 40 arranged at 120 ° from one another, or more generally distributed from the same way as the well drains.
  • the lower free end 41 of the upper part 38 also threaded, ends with a locking finger 42.
  • a left-right threaded connection sleeve connects the ends 39 and 41. When the sleeve 43 is turned in one direction, right for example, the ends 39 and 41 move away from each other until the finger 42 is released from the housing in which it was engaged.
  • the sleeve 43 is turned to the left and the two ends 39 and 41 are brought together so as to introduce the finger 42 into the corresponding housing 40 and thus block, in the new position, the upper and lower parts of the tool body.
  • the rod 32 passes through the upper and lower walls of the tool 20 and ends with an end 43 whose function is explained below.
  • the upper part 38 includes an orientation key 44.
  • a guide key 45 is also provided to ensure good sliding.
  • the diameter of the orientation and guide keys 44 and 45 is slightly greater than the diameter of the body 21 so that the orientation keys 44 and 45 can engage in the slot 18 of the jacket 17.
  • An advance trigger system 46 of the tool head 22 is housed in a window 47 formed in the upper part 38.
  • the system 46 consists of a clamp 48 which is mounted on a part 49 of reduced diameter of the rod 32 ( Figure 4).
  • the branches 50 are held in an adequate position by a breaking wire 51 and are each articulated on an axis 52. In this position, the spacing of the legs of the clamp is greater than the width of the groove 18.

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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)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
  • Toys (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Processing Of Terminals (AREA)
  • Looms (AREA)

Description

La présente invention concerne un dispositif de positionnement d'un outil dans un drain d'un puits foré et, plus particulièrement d'un puits de pétrole en production.The present invention relates to a device for positioning a tool in a drain of a drilled well and, more particularly of an oil well in production.

De plus en plus, des puits ramifiés constitués par un puits principal vertical et des puits latéraux reliés au puits principal et faisant avec ce dernier un certain angle, sont fréquemment utilisés, de manière à notamment accroître la production du puits principal ou encore appelé puits "mère".Increasingly, branched wells constituted by a vertical main well and lateral wells connected to the main well and making with the latter a certain angle, are frequently used, so as in particular to increase the production of the main well or also called well " mother".

Les raisons d'un forage et de la mise en production d'un puits ramifié aussi bien dans le domaine pétrolier que le domaine minier, sont nombreuses et présentent soit un caractère économique, soit un caractère lié à la nature de la couche de terrain exploitée.The reasons for drilling and bringing a branched well into production in both the petroleum and mining fields are numerous and are either of an economic nature or of a nature linked to the nature of the layer of land exploited .

En effet, les ramifications latérales d'un puits de forage mère permettent outre l'accroissement de la production, de récupérer au maximum le contenu du gisement exploité. De plus, ces ramifications permettent, avec une même installation de surface, d'étendre la zone souterraine exploitée, et de réduire la haute résistance d'écoulement qui apparaît près du trou de forage dans un puits mère.Indeed, the lateral ramifications of a mother borehole allow, in addition to the increase in production, to recover as much as possible the content of the exploited deposit. In addition, these ramifications make it possible, with the same surface installation, to extend the exploited underground zone, and to reduce the high flow resistance which appears near the borehole in a mother well.

Une autre utilité de ces ramifications est de pouvoir exploiter des couches de terrain comprenant un grand nombre de fractures. Cela provient du fait que les ramifications latérales interceptent les fractures et les relient au système de drainage du puits mère.Another utility of these ramifications is to be able to exploit layers of land comprising a large number of fractures. This is because the lateral ramifications intercept the fractures and connect them to the drainage system of the mother well.

Enfin, de tels puits ramifiés sont très utiles pour exploiter de façon efficace un gisement dont le réservoir présente un relief du toit très irrégulier et/ou une faible épaisseur.Finally, such branched wells are very useful for efficiently exploiting a deposit whose reservoir has a very irregular roof relief and / or a small thickness.

Les ramifications étaient généralement réalisées, à partir du puits mère, au moyen d'un sifflet déviateur, dénommé whipstock en anglais. Bien évidemment, les diamètres des ramifications sont inférieurs à ceux du puits mère et l'angle de déviation de chaque ramification est choisi en fonction de la zone du gisement où la ramification doit déboucher. Dans certains cas, pour minimiser les coûts du forage, on utilise le même sifflet déviateur pour forer deux ramifications symétriques par rapport au puits mère, en tournant le sifflet déviateur à 1800 dans le puits mère. De tels puits ramifiés au moyen de déviateurs sont décrits dans les brevets US-4 396 075 et 4 415 205.The ramifications were generally carried out, starting from the mother well, by means of a deviating whistle, called whipstock in English. Obviously, the diameters of the branches are smaller than those of the mother well and the angle of deflection of each branch is chosen according to the zone of the deposit where the branch must open. In some cases, to minimize drilling costs, the same diverter whistle is used to drill two symmetrical ramifications with respect to the mother well, by turning the diverter whistle to 1800 in the mother well. Such wells branched by means of deflectors are described in US Patents 4,396,075 and 4,415,205.

Après chaque forage d'une ramification on y introduit des éléments nécessaires à l'exploitation du gisement. Quand toutes les ramifications sont prêtes à être utilisées, on extrait du puits mère tous les appareils qui n'ont aucune utilité au cours de la production. Il en est notamment ainsi du sifflet déviateur. D'ores et déjà, il faut rappeler qu'une telle structure du puits mère avec les puits ramifiés présente l'inconvénient de ne pouvoir bénéficier d'une liaison sélective entre le fond de chaque ramification avec la surface.After each drilling of a branch, elements necessary for the exploitation of the deposit are introduced. When all the ramifications are ready to be used, all the devices which have no use during production are extracted from the mother well. This is particularly the case with the deviating whistle. As of now, it should be recalled that such a structure of the mother well with the branched wells has the drawback of not being able to benefit from a selective bond between the bottom of each branching with the surface.

Dans tout ce qui précède, on a fait référente à des ramifications latérales. Bien entendu, les ramifications peuvent être obliques, horizontales ou dans n'importe quel le direction, pour autant qu'elles sont associées à un puits mère à partir duquel elles sont réalisées.In all of the foregoing, reference has been made to lateral ramifications. Of course, the branches can be oblique, horizontal or in any direction, as long as they are associated with a mother well from which they are made.

Tant que les ramifications sont en service, c'est-à-dire en exploitation, aucune difficulté majeure ne se pose.As long as the ramifications are in service, that is to say in operation, no major difficulty arises.

Par contre, lorsqu'une ou plusieurs des ramifications a été mise hors service et qu'on souhaite la réactiver ou la mettre à nouveau en service, alors se posent de graves difficultés.On the other hand, when one or more of the ramifications has been taken out of service and it is desired to reactivate it or put it back into service again, then serious difficulties arise.

La première de ces difficultés est surtout liée au fait que, pendant la période de service, elle a été comblée par les déblais et qu'il est très difficile de la localiser avec précision. Certes, on pourrait envisager, chaque fois qu'on descend un sifflet déviateur, pour le forage d'une ramification, de noter très précisément son emplacement dans le puits mère pour ensuite le replacer exactement au même endroit. Une telle opération paraît délicate à réaliser.The first of these difficulties is mainly related to the fact that, during the period of service, it was filled by the excavated material and that it is very difficult to locate it with precision. Admittedly, one could consider, each time one descends a deflecting whistle, for the drilling of a ramification, to note very precisely its location in the mother well and then to replace it exactly in the same place. Such an operation seems delicate to carry out.

La seconde difficulté réside dans le fait qu'à supposer qu'on puisse relocaliser la ramification d'origine, il serait impératif d'utiliser à nouveau le sifflet déviateur pour soit dégager ladite ramification réactivée de tous les comblements, soit de recommencer un forage.The second difficulty lies in the fact that supposing that the original branch can be relocated, it would be imperative to use the deflecting whistle again to either free said reactivated branch from all the fillings, or to start drilling again.

Devant ces difficultés majeures, il fut préférable de ne pas remettre en service les ramifications mais d'en forer de nouvelles ce qui est très couteux même si le forage d'une ramification n'est pas comparable à celui d'un puits vertical principal.Faced with these major difficulties, it was preferable not to put the branches back into service but to drill new ones, which is very costly even if drilling a branch is not comparable to that of a main vertical well.

Afin de remédier aux inconvénients précités, il a été réalisé un dispositif qui permette une exploitation normale, lorsque les ramifications sont en service, mais également, auparavant, de pouvoir déposer un tubage perdu susceptible d'être reconnecté en surface de façon à éventuellement reactiver une ou plusieurs d'entre elles après leur mise hors service, sans nécessiter de gros investissements.In order to remedy the aforementioned drawbacks, a device has been produced which allows normal operation, when the ramifications are in service, but also, beforehand, being able to deposit a lost casing capable of being reconnected on the surface so as to possibly reactivate or more of them after their decommissioning, without requiring large investments.

Un tel dispositif est décrit dans la demande de brevet français n° 83 1398 correspondant au EP-A-136 953. Le dispositif de forage et de mise en production pétrolière d'un puits de forage formé d'un puits mère et d'au moins un puits ramifié débouchant dans ledit puits mère comprend un tube externe disposé dans le puits mère, au moins un ensemble de dérivation fixé in situ dans ledit tube externe et comportant au moins un tube de dérivation fixe dont l'extrémité inférieure communique avec un puits ramifié, un ensemble de raccordement qui, associé à un ensemble de positionnement, permet de forer et de remettre en service après usage, n'importe quelle ramification et ce grâce à une clavette fixe de l'ensemble de positionnement sur laquelle s'appuie un profil en came de l'ensemble de raccordement.Such a device is described in French patent application No. 83 1398 corresponding to EP-A-136 953. The device for drilling and for producing oil in a wellbore formed from a mother well and at least at least one branched well opening into said mother well comprises an external tube arranged in the mother well, at least one bypass assembly fixed in situ in said external tube and comprising at least one fixed bypass tube whose lower end communicates with a well branched, a connection assembly which, associated with a positioning assembly, makes it possible to drill and return to service after use, any branching, thanks to a fixed key of the positioning assembly on which a cam profile of the connection assembly.

Toutefois on s'est aperçu qu'à chaque intervention dans un drain latéral pendant la phase de production, il est nécessaire de remonter la pompe et le tubing ou tube de production, puis ensuite descendre le tube de forage ou riser. Lorsque l'intervention est terminée, le tube de production et la pompe sont remis en place. De telles opérations de remontée et de descente du tube de production et de la pompe sont non seulement coûteuses en elles- mêmes, mais surtout immobilisent le puits tout entier pendant des durées relativement longues ce qui, sur le plan de la production doit être éviter chaque fois que cela est possible pour des raisons techniques et économiques.However, we realized that with each intervention in a lateral drain during the production phase, it is necessary to reassemble the pump and the tubing or production tube, then lower the drilling tube or riser. When the intervention is finished, the production tube and the pump are replaced. Such operations of raising and lowering the production tube and the pump are not only costly in themselves, but above all immobilize the entire well for relatively long periods of time which, in terms of production must be avoided each time. whenever possible for technical and economic reasons.

La présente invention résoud le problème posé en raccourcissant considérablement la durée d'immobilisation d'un puits en phase de production, en proposant un dispositif qui permette de positionner un outil d'intervention correctement dans le drain concerné, sans avoir à remonter le tube de production.The present invention solves the problem posed by considerably shortening the downtime of a well in the production phase, by proposing a device which makes it possible to position an intervention tool correctly in the drain concerned, without having to reassemble the tube. production.

Par intervention, il faut comprendre toute opération à réaliser dans un drain latéral. Une opération peut être des mesures à effectuer dans ledit drain en phase de production, comme par exemple des mesures d'interférences, ou encore un bouchage du drain, lors d'une venue d'eau.By intervention, it is necessary to understand any operation to be carried out in a lateral drain. An operation can be measurements to be carried out in said drain during the production phase, such as for example interference measurements, or else a plugging of the drain, during an inflow of water.

A cet effet, le dispositif selon l'invention comprend un ensemble de dérivation fixé in situ dans ledit puits et comprenant des tubes de dérivation qui sont chacun reliés à un desdits drains,

  • - un ensemble de raccordement disposé et solidaire de l'ensemble de dérivation, ledit ensemble de raccordement comprenant d'une part un profil en came qui s'appuie sur une clavette fixe et, d'autre part, des tubes de raccordement qui sont introduits dans lesdits tubes de l'ensemble de dérivation de manière que lesdits tubes de raccordement soient reliés aux drains du puits foré, caractérisé en ce qu'il comprend, en outre, un ensemble intermédiaire dans lequel sont logés des tubes intermédiaires, dont les extrémités superieures convergent pour former une entrée unique disposée dans la tête dudit ensemble intermédiaires, les extrémités inférieues desdits tubes intermédiaires débouchant dans lesdits tubes de raccordement; un organe d'orientation et de guidage interposé entre l'ensemble intermédiaire et un tube de production dans une partie élargie duquel est logée une pompe suspendue à un train de tiges de pompage, ledit organe d'orientation étant disposé dans le tube de production et muni d'une fente qui est orientée par rapport au profil en came de l'ensemble de raccordement.
To this end, the device according to the invention comprises a bypass assembly fixed in situ in said well and comprising bypass tubes which are each connected to one of said drains,
  • - A connection assembly disposed and integral with the bypass assembly, said connection assembly comprising on the one hand a cam profile which rests on a fixed key and, on the other hand, connection tubes which are introduced in said tubes of the bypass assembly so that said connection tubes are connected to the drains of the wellbore, characterized in that it further comprises an intermediate assembly in which are housed intermediate tubes, the upper ends of which converge to form a single inlet disposed in the head of said intermediate assembly, the lower ends of said intermediate tubes opening into said connection tubes; an orientation and guide member interposed between the intermediate assembly and a production tube in an enlarged part of which is housed a pump suspended from a pumping rod train, said orientation member being disposed in the production tube and provided with a slot which is oriented relative to the cam profile of the connection assembly.

Grâce à la présente invention, l'outil d'intervention est pré-orienté en surface par le positionnement correct du manchon d'orientation par rapport au drain latéral dans lequel l'outil doit être descendu.Thanks to the present invention, the intervention tool is pre-oriented on the surface by the correct positioning of the orientation sleeve relative to the lateral drain in which the tool must be lowered.

D'autres avantages et caractéristiques apparaîtront à la lecture de la description donnée ci-dessous à titre indicatif, mais non limitatif d'un mode de réalisation préféré de l'invention, ainsi que du dessin annexé sur lequel:

  • - la figure 1 est une vue partielle en coupe très schématique d'un puits ramifie;
  • - la figure 2 est une vue en perspective de l'organe d'orientation et de guidage du dispositif selon l'invention;
  • - la figure 3 est une vue en coupe d'un outil d'intervention muni d'une partie du dispositif selon l'invention;
  • - la figure 4 est une vue en coupe agrandie des moyens de libération de la tête de l'outil d'intervention.
Other advantages and characteristics will appear on reading the description given below by way of indication, but not limiting of a preferred embodiment of the invention, as well as of the appended drawing in which:
  • - Figure 1 is a partial very schematic sectional view of a branched well;
  • - Figure 2 is a perspective view of the orientation and guide member of the device according to the invention;
  • - Figure 3 is a sectional view of an intervention tool provided with part of the device according to the invention;
  • - Figure 4 is an enlarged sectional view of the head release means of the intervention tool.

Un puits ramifié tel que représenté très schématiquement sur la figure 1 comprend par exemple un drain vertical 1 et un ou plusieurs autres drains latéraux dont un seul 2 est représenté. De manière habituelle le puits comprend un tubage externe 3 qui descend jusqu'au fond du puits mère, un tube de production 4, disposé dans le tubage externe 3, une pompe 5 descendue dans une partie élargie 4a du tube de production jusqu'à une certaine hauteur, ladite pompe 5 étant suspendue à un train de tiges de pompage. Un réceptacle ou pièce de base 7 est maintenue à demeure dans le puits, par exemple par cimentation ou tout autre moyen-de fixation et comprend plusieurs tubes de dérivation communiquant chacun, par leur extrémité inférieure avec un drain du puits. La pièce de base 7 comprend autant d'orifices qu'il y a de drains dans le puits. Dans un puits a trois drains disposés à 120° les uns des autres, la pièce de base comprendra trois orifices a 120°, chacun des orifices correspondant et relié à un des drains. Une telle pièce de base est décrite par exemple dans la demande de brevet français, rappelée ci-dessus, sous la dénomination d'un ensemble de dérivation.A branched well as shown very diagrammatically in FIG. 1 comprises for example a vertical drain 1 and one or more other lateral drains of which only one 2 is shown. Usually the well comprises an external casing 3 which descends to the bottom of the mother well, a production tube 4, disposed in the external casing 3, a pump 5 lowered in an enlarged part 4a of the production tube to a certain height, said pump 5 being suspended from a string of pumping rods. A receptacle or base part 7 is permanently fixed in the well, for example by cementing or any other fixing means and comprises several bypass tubes each communicating, at their lower end with a drain from the well. The base part 7 comprises as many orifices as there are drains in the well. In a well with three drains arranged at 120 ° from each other, the base part will include three orifices at 120 °, each of the corresponding orifices and connected to one of the drains. Such a basic part is described for example in the French patent application, recalled above, under the name of a bypass assembly.

Un ensemble de raccordement 8 est solidaire de la pièce de base 7 et comprend un profil en came qui s'appuie sur une clavette fixe 9. L'ensemble 8 comprend également des logements 10 pour des bouchons et des tubes de raccordement 11 qui sont introduits dans des alésages 60 ménagés dans la pièce de base 7, de façon que les tubes 11 communiquent à travers ladite pièce de base 7, avec les drains 1, 2 du puits.A connection assembly 8 is integral with the base part 7 and comprises a cam profile which rests on a fixed key 9. The assembly 8 also includes housings 10 for plugs and connection tubes 11 which are introduced in bores 60 formed in the base part 7, so that the tubes 11 communicate through said base part 7, with the drains 1, 2 of the well.

Un ensemble intermédiaire 12 est fixé sur l'ensemble de raccordement 8 et comprend trois tubes intermédiaires dont seulement deux 13, 14 sont représentés, et qui convergent vers la tête 15 de façon à former, dans ladite tête, un orifice unique d'entrée 61, alors que chacun desdits tubes débouchent à l'extrémité inférieure dudit élément dans un des tubes de l'ensemble de raccordement 8.An intermediate assembly 12 is fixed to the connection assembly 8 and comprises three intermediate tubes of which only two 13, 14 are shown, and which converge towards the head 15 so as to form, in said head, a single inlet orifice 61 , while each of said tubes opens out at the lower end of said element into one of the tubes of the connection assembly 8.

Un organe d'orientation de guidage 16 est constitué par une chemise creuse 17 comprenant une fente longitudinale 18 qui est orientée par rapport au profil en came de l'ensemble de raccordement 8 qui est lui-même orienté convenablement grâce à la clavette fixe 9.A guide orientation member 16 consists of a hollow jacket 17 comprising a longitudinal slot 18 which is oriented relative to the cam profile of the connection assembly 8 which is itself properly oriented by virtue of the fixed key 9.

L'organe d'orientation 16 est interposé entre le tube de production 4 et l'ensemble intermédiaire 12, ledit tube de production 4 comportant une extension 4b qui est introduite dans 1 orifice d'entrée 61 de la tête 15.The orientation member 16 is interposed between the production tube 4 and the intermediate assembly 12, said production tube 4 comprising an extension 4b which is introduced into 1 inlet orifice 61 of the head 15.

Les bords d'entrée 19 de ladite fente sont évasés et leurs arêtes vives sont meulées de façon à permettre un glissement aisé sur lesdites arêtes.The entry edges 19 of said slot are flared and their sharp edges are ground so as to allow easy sliding on said edges.

Dans un exemple de réalisation figure 3, un outil d'intervention 20 comprend un corps 21 à l'extrémité inférieure duquel émerge une tête 22 à laquelle est raccordé un prolongateur, non représenté, de longueur variable, et devant être introduit dans le drain sélectionné où doit avoir lieu l'intervention. La tête 22 est en majeure partie logée dans le corps 21 et pivote autour d'un axe 23 maintenu en position par une vis de blocage 24. L'extrémité supérieure 25 de la tête 22 vers la droite sur la figure 3, coopère avec un ensemble de biellettes 26 comportant un levier 27 articulé sur deux axes 28, 29 et une biellette 30 qui est articulée à une extrémité sur l'axe 29 et à l'autre extrémité sur un axe 31. Une tige 32 solidaire de l'ensemble de biellettes 26 est logée dans le corps 21 et comprend une partie filetée 33 s'engageant dans un écrou 34 servant d'élément d'appui pour une extrémité d'un ressort en compression 35, disposé autour de ladite tige 32, et dont l'autre extrémité est en appui sur une rondelle 36 fixée au corps 21. L'écrou 34 est également utilisé pour le réglage de la tension du ressort 35.In an exemplary embodiment in FIG. 3, an intervention tool 20 comprises a body 21 at the lower end from which emerges a head 22 to which is connected an extension, not shown, of variable length, and which must be introduced into the selected drain where the intervention should take place. The head 22 is mainly housed in the body 21 and pivots about an axis 23 held in position by a locking screw 24. The upper end 25 of the head 22 to the right in FIG. 3, cooperates with a set of links 26 comprising a lever 27 articulated on two axes 28, 29 and a link 30 which is articulated at one end on the axis 29 and at the other end on an axis 31. A rod 32 integral with the assembly of rods 26 is housed in the body 21 and comprises a threaded portion 33 engaging in a nut 34 serving as a support element for one end of a compression spring 35, arranged around said rod 32, and the the other end is supported on a washer 36 fixed to the body 21. The nut 34 is also used for adjusting the tension of the spring 35.

Le corps 21 est constitué principalement en deux parties basse 37 et haute 38. L'extrémité libre supérieure 39 de la partie basse 37 est filetée et est munie de trois logements 40 disposés a 120° les uns des autres, ou plus généralement distribués de la même façon que les drains du puits. L'extrémité libre inférieure 41 de la partie haute 38, également filetée, se termine par un doigt de blocage 42. Un manchon de raccordement taraudé gauche-droite, relie les extrémités 39 et 41. Lorsque le manchon 43 est tourné dans un sens, droite par exemple, les extrémités 39 et 41 s'éloignent l'une de l'autre jusqu'à ce que le doigt 42 se trouve dégagé du logement dans lequel il était engagé. Une fois que le doigt 42 est au-dessus d'un autre logement 40, le manchon 43 est tourné vers la gauche et les deux extrémités 39 et 41 sont rapprochées de manière à introduire le doigt 42 dans le logement 40 correspondant et bloquer ainsi, dans la nouvelle position, les parties haute et basse du corps de l'outil. Bien évidemment, la tige 32 traverse les parois haute et basse de l'outil 20 et se termine par une extrémité 43 dont la fonction est explicitée ci-après.The body 21 consists mainly of two lower 37 and upper 38 parts. The upper free end 39 of the lower part 37 is threaded and is provided with three housings 40 arranged at 120 ° from one another, or more generally distributed from the same way as the well drains. The lower free end 41 of the upper part 38, also threaded, ends with a locking finger 42. A left-right threaded connection sleeve connects the ends 39 and 41. When the sleeve 43 is turned in one direction, right for example, the ends 39 and 41 move away from each other until the finger 42 is released from the housing in which it was engaged. Once the finger 42 is above another housing 40, the sleeve 43 is turned to the left and the two ends 39 and 41 are brought together so as to introduce the finger 42 into the corresponding housing 40 and thus block, in the new position, the upper and lower parts of the tool body. Obviously, the rod 32 passes through the upper and lower walls of the tool 20 and ends with an end 43 whose function is explained below.

La partie haute 38 comprend une clavette d'orientation 44. Une clavette guidage 45 est également prévue pour assurer un bon coulissage.The upper part 38 includes an orientation key 44. A guide key 45 is also provided to ensure good sliding.

Le diamètre des clavettes d'orientation et de guidage 44 et 45 est légèrement supérieur au diamètre du corps 21 de manière à ce que les clavettes d'orientation 44 et 45 puissent s'engager dans la fente 18 de la chemise 17.The diameter of the orientation and guide keys 44 and 45 is slightly greater than the diameter of the body 21 so that the orientation keys 44 and 45 can engage in the slot 18 of the jacket 17.

Un système de déclenchement d'avance 46 de la tête d'outil 22 est logé dans une fenêtre 47 ménagée dans la partie haute 38. Le système 46 est constitué par une pince 48 qui est montée sur une partie 49 de diamètre réduit de la tige 32 (figure 4). Les branches 50 sont maintenues en position adéquate par un fil de rupture 51 et sont articulées chacune sur un axe 52. En cette position, l'espacement des branches de la pince est supérieure à la largeur de la rainure 18.An advance trigger system 46 of the tool head 22 is housed in a window 47 formed in the upper part 38. The system 46 consists of a clamp 48 which is mounted on a part 49 of reduced diameter of the rod 32 (Figure 4). The branches 50 are held in an adequate position by a breaking wire 51 and are each articulated on an axis 52. In this position, the spacing of the legs of the clamp is greater than the width of the groove 18.

Le dispositif suivant l'invention fonctionne de la manière suivante:

  • Après avoir remonté la pompe 5 au moyen d'une grue par exemple, on pré-oriente en surface l'outil d'intervention au moyen d'une plaque, non représentée, qui comprend des orifices disposés à la verticale de ceux de la pièce de base 7, et on descend ledit outil dans cette position. Grâce à cette pré- orientation et au fait que la chemise 17 est également orientée par rapport aux drains du puits, l'outil a sa clavette d'orientation 44 qui s'engage dans la rainure 18 de ladite chemise, la tête 22 de l'outil se trouvant alors positionnée par rapport au drain sélectionné dans lequel doit avoir lieu l'intervention.
The device according to the invention operates as follows:
  • After reassembling the pump 5 by means of a crane, for example, the intervention tool is pre-oriented on the surface by means of a plate, not shown, which comprises orifices arranged vertically from those of the part. base 7, and said tool is lowered into this position. Thanks to this pre-orientation and to the fact that the jacket 17 is also oriented relative to the drains of the well, the tool has its orientation key 44 which engages in the groove 18 of said jacket, the head 22 of the tool then being positioned relative to the selected drain in which the intervention must take place.

Au moment où les branches 50 de la pince 48 viennent buter sur les bords d'entrée 19 de la fente 18, lesdits bords jouent alors le rôle d'une came pour lesdites branches qui, au fur et à mesure qu'elles se rapprochent l'une de l'autre exercent une traction sur le fil de rupture 51. Lorsque ce dernier casse, l'extrémité de la partie 49 de la tige 32 qui était en appui sur les branches 50 est libérée. De ce fait, la tige 32 ne se trouve plus bloquée et grâce au ressort 35 dont la force est de l'ordre de 150 a 200 Kg, elle est déplacée vers la droite sur la figure 3. Le mouvement de la tige 32 entraîne celui de la biellette 30 et le levier 27 qui est en appui sur l'extrémité 25 de la tête de l'outil fait basculer ladite tête 22 d'un angle d'environ 3° de façon à être certain que le prolongateur qui lui est associé soit bien dans le drain approprié sélectionné et ne puisse être coincé sur la paroi dudit drain.When the branches 50 of the clamp 48 abut on the entry edges 19 of the slot 18, said edges then act as a cam for said branches which, as they approach 'one of the other exert a traction on the breaking wire 51. When the latter breaks, the end of the part 49 of the rod 32 which was in abutment on the branches 50 is released. Therefore, the rod 32 is no longer blocked and thanks to the spring 35 whose force is of the order of 150 to 200 kg, it is moved to the right in Figure 3. The movement of the rod 32 causes that of the link 30 and the lever 27 which is supported on the end 25 of the head of the tool causes said head 22 to tilt by an angle of approximately 3 ° so as to be certain that the extension associated with it either in the appropriate drain selected and cannot be trapped on the wall of said drain.

Lorsqu'on veut accéder à un autre drain, on procède comme indiqué ci-dessus, en amenant le doigt 42 dans un autre logement 40 de la partie basse de l'outil. Dans ces conditions l'outil est orienté suivant un autre azimuth correspondant à un autre drain, disposé à 120° du précédent.When we want to access another drain, we proceed as indicated above, bringing the finger 42 into another housing 40 in the lower part of the tool. Under these conditions, the tool is oriented along another azimuth corresponding to another drain, arranged at 120 ° from the previous one.

On peut également envisager l'utilisation de l'outil selon l'invention dans le domaine minier et notamment en coopération avec les dispositifs décrits dans les brevets U.S.One can also consider the use of the tool according to the invention in the mining field and in particular in cooperation with the devices described in U.S. patents.

Claims (15)

1. A device fo positioning a servicing tool (20) whithin a selected flow string (1, 2) of a wellbore, of the type comprising a branch assembly (7) fixed in situ within the wellbore and having tubes which are each connected to one of said flow strings, a connecting assembly (8) fixed on the branch assembly, said connecting assembly being provided on the one hand with a cam profile applying on a fixed spline (9), and on the other hand connecting tubes (1) wich are introduced into said tubes of the branch assembly (7), whereby the connecting tubes are connected to the branch flow string of the wellbore, characterized in that it further comprises an intermediate assembly (12) in which are housed intermediate tubes (13,14) so arranged as to converge at one upper end thereof towards a single inlet (61) provided in the head (15) of said intermediate assembly, the lower end of said intermediate tubes communicating with said connecting tubes; an orientation and and guiding member (16) interposed between the intermediate assembly and a production tube in an elarged portion (4a) of which is housed a pump (5) suspended from a string of pumping rods (6), said orientation and guiding member being disposed into the production tube and provided with a slit (18) which is oriented with respect to said cam profile of the connecting assembly.
2. A device according to claim 1, wherein the production tube (4) is extended beyond the orientation and guiding member (16) and is inserted in the single inlet (61) of the intermediate assembly (8).
3. A device according to claim 1, wherein the servicing tool (20) has two body sections (37, 38) in which recesses (40) are provided in a lower tool- body section (37) for receiving a positioning stud (42) carried by a upper tool-body section (38) in such a manner as to ensure that each position occupied by a stud (42) within a recess (40) corresponds to a position of said upper tool-body section with respect to one flow string of the wellbore.
4. A device according to claim 3, wherein the upper and lower tool-body sections (37, 38) are coupled together by means of a sleeve (43).
5. A device according to claim 4, wherein the coupling sleeve (43) is adapted to cooperate with the ends (39, 41 ) of the two tool-body sections in such a manner as to ensure that a rotational displacement of the sleeve causes a relative displacement of said upper and lower tool-body sections with respect to each other.
6. A device according to one of the claims 1, 3, 4 or 5, wherein the tool is pre-oriented at the surface with respect to the selected flow string.
7. A device according to one of the claims 1, 3, 4, 5 or 6, wherein the upper tool-body section (38) is provided with an orientation spline (44).
8. A device according to claim 1, wherein said device is provided in addition with means (46) for releasing the tool head (22).
9. A device according to claim 8, wherein the means (46) for releasing the tool head (22) are constituted by a tong unit (48) in which the tongarms (so) are adapted to engage within the slit (18) of the fixed orientation member (16), the movement of said tongarms within said slit being such as to release an actuating rod (32) which is rigidly fixed to said tool head.
10. A device according to claim 1, wherein the actuating rod (32) is subjected to the action of a prestressed spring (35) which urges said actuating rod to the released position.
11. A device according to claim 1, wherein said device comprises means (26) for angularly displacing the tool head (22) at the time of introduction of the tool into the selected flow string.
12. A device according to claim 11, wherein the angular displacement is of the order of a few degrees and preferably equal to three degrees.
13. A device according to claims 11 and 9, wherein the angular displacement means are constituted by a system of crank-arms (27, 30) interposed between the tool head (22) and the actuating rod (32).
14. A device according to one of preceeding claims 1, wherein the tool head (22) is pivotally mounted on a pivot-pin (23).
15. A device according to claim 9, wheren the tong unit (48) is housed within a window (47) formed in the upper tool-body section.
EP86401523A 1985-07-31 1986-07-09 Device for positioning a tool in a drain pipe of a drilled well Expired EP0211725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8511682A FR2585761B1 (en) 1985-07-31 1985-07-31 DEVICE FOR POSITIONING A TOOL IN A DRAIN OF A WELLBORE
FR8511682 1985-07-31

Publications (2)

Publication Number Publication Date
EP0211725A1 EP0211725A1 (en) 1987-02-25
EP0211725B1 true EP0211725B1 (en) 1989-01-25

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EP86401523A Expired EP0211725B1 (en) 1985-07-31 1986-07-09 Device for positioning a tool in a drain pipe of a drilled well

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US (1) US4742871A (en)
EP (1) EP0211725B1 (en)
JP (1) JPS6335995A (en)
AU (1) AU586873B2 (en)
DE (1) DE3661953D1 (en)
ES (1) ES2000795A6 (en)
FR (1) FR2585761B1 (en)
NO (1) NO177805C (en)

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JPS6335995A (en) 1988-02-16
ES2000795A6 (en) 1988-03-16
NO177805C (en) 1995-11-22
NO862962D0 (en) 1986-07-23
EP0211725A1 (en) 1987-02-25
FR2585761A1 (en) 1987-02-06
AU586873B2 (en) 1989-07-27
NO177805B (en) 1995-08-14
FR2585761B1 (en) 1988-05-13
AU6047186A (en) 1987-02-05
US4742871A (en) 1988-05-10
DE3661953D1 (en) 1989-03-02
NO862962L (en) 1987-02-02

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