EP0132423B1 - Borehole logging and work-over method and apparatus - Google Patents

Borehole logging and work-over method and apparatus Download PDF

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Publication number
EP0132423B1
EP0132423B1 EP84401247A EP84401247A EP0132423B1 EP 0132423 B1 EP0132423 B1 EP 0132423B1 EP 84401247 A EP84401247 A EP 84401247A EP 84401247 A EP84401247 A EP 84401247A EP 0132423 B1 EP0132423 B1 EP 0132423B1
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EP
European Patent Office
Prior art keywords
extension
plug
pipe
instrument
well
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84401247A
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German (de)
French (fr)
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EP0132423A1 (en
Inventor
Christian Wittrisch
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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Publication of EP0132423A1 publication Critical patent/EP0132423A1/en
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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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/14—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
    • 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
    • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
    • 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like

Definitions

  • the present invention relates to a method and a device for carrying out measurements or / and interventions in a well at the level of the surrounding formations.
  • the invention is particularly applicable when it is a question of carrying out measurements and / or interventions at the level of geological formations.
  • the measurements carried out may include the recording of the pressure and the temperature of the bottom, the measurement (focused or not) of the electrical resistivity, as well as acoustic, nuclear measurements, etc.
  • the measurements may be supplemented by viewing the walls of the well by television cameras, for example.
  • Such a device therefore requires the descent from the surface of a more or less long extension depending on the extent of the area of the well to be explored.
  • the further the area to be explored the longer the length over which the extension must be routed.
  • the tube is immobilized in its low position for long periods. This poses significant risks of the tube becoming trapped in the well. These risks are increased if the well is deviated from the vertical.
  • device wells By the expression “deviated wells” is meant here, as in the rest of the description, both the well deviated wells as well as the strongly deviated or substantially horizontal wells.
  • This document describes a method which requires the extension to be pumped through a tube from the surface to the place where measurements are to be made.
  • This method uses at least one tube comprising at least two parts, one called upper and the other lower, a possibly tubular extension having two ends, one called upper and the other lower, and a measuring instrument or / and intervention fixed at the lower end of the extension.
  • Each of the two parts of the tube and the extension can have several elements.
  • a first variant of the method according to the invention is applicable when the instrument is electrically connected to the surface, and when it comprises a first connector comprising first and second electrical outlets, these two electrical outlets possibly being pluggable in liquid medium and of the multicontact type, said first socket being in normal use fixed with respect to the extension.
  • the second grip is made integral with the extension.
  • said fourth socket is optionally made integral with the extension, in the vicinity of its lower end.
  • At least one of the second and fourth electrical outlets is moved by pumping, in particular when the method is implemented in deviated wells.
  • At least some of the displacements of the extension can be caused by pumping a fluid such as gas, liquid, liquid plus mud, two-phase fluid, etc.
  • the first cable can possibly enter the upper tube through a side window connection.
  • extension suspended from the lower tube in the extended position during penetration of the tube into the well or during assembly of the lower tube, in particular when the latter is composed of several elements. . Leaving the extension suspended allows an outside diameter of the probe greater than the inside diameter of the lower tube.
  • the present invention also provides a device for carrying out measurements or / and interventions in a well.
  • This device comprises at least one tube and an optionally tubular extension having two ends, one called lower and the other upper, said tube being adapted to support said extension and comprising at least two parts, one called upper and the other lower, each of these two parts as well as the extension may include several elements.
  • said instrument is integral with the lower end of the extension and the device comprises means for anchoring said extension on the lower part of the tube, these means being unlockable from the surface and means allowing the displacement of the extension relative to the tube.
  • the anchoring means can be, for example mechanical, electro-hydraulic or any other known type.
  • a first embodiment of the device is applicable to the case where the instrument is electrically connected to a first electrical connector which comprises first and second electrical outlets, said first outlet being fixed relative to the extension.
  • This embodiment is characterized in that it comprises a first electrical transmission cable whose lower end is mechanically and electrically fixed to said second socket and whose upper end is connected to surface installations and in that said second socket has in its vicinity attachment means which cooperate with complementary means arranged in the vicinity of the upper end of the extension.
  • This first connector can be located anywhere in the extension. However, it will be advantageous to place it either near the upper end of the probe, as this avoids having to move the second socket inside the extension which is of a different diameter from that of the tube. lower, ie in the vicinity of the instrument.
  • this piston may possibly cooperate with a clearance made in the tube substantially at the place where its action must cease.
  • a second embodiment, supplementing the first, is applicable when the instrument and the first socket are electrically connected using a second connector comprising a third socket and a fourth socket, said third socket being integral with the extension in the vicinity from its lower end.
  • This second embodiment is characterized in that it comprises a second electric transmission cable whose lower end is mechanically and electrically fixed to said fourth socket and whose upper end is connected to the first socket.
  • Both the second and the fourth sockets can be provided with means allowing their displacement by pumping fluid from the surface.
  • the device according to the invention may include means for moving the extension by pumping fluid from the surface.
  • extension can be fitted with a piston or pass through a constriction secured to the lower tube, this constriction creating a pressure difference sufficient to move the extension.
  • the extension may be provided with orifices allowing the circulation of a fluid from the zone situated upstream from the piston or from the constriction towards the zone situated downstream.
  • the fluid outlet orifice may be located in the vicinity of the probe, or be positioned in such a way that it allows the circulation of the fluid only when the extension has reached predetermined positions, this orifice being situated for example in the vicinity from the position occupied by the probe when the latter is extended to the maximum.
  • the passage sections of these orifices or more generally the pressure losses of these fluid circulation paths will be determined to allow the extension of the desired length to be released under the action of pressure forces.
  • the extension must have sufficient rigidity to be able to move the instrument in the well.
  • the extension may be composed of several tubular elements, each of which comprises electrical connectors, these elements ensuring the electrical and mechanical connection between the instrument and the first connector.
  • the displacements of the extension to make it enter the tube are obtained by exerting traction on the first electric cable which in this case will have sufficient mechanical strength to withstand such efforts.
  • the second or fourth electrical outlet may be equipped with unlockable hooking members.
  • These organs may be mechanical, electro-hydraulic or of any other known type. In the event that these members include shearable washers, the electric cables would have the appropriate mechanical characteristics to withstand the tensile forces causing shear of the washers.
  • the first electrical cable can enter the tube through a side window connection (which specialists often refer to by the English term “side entry sub").
  • the diameter of the lower part of the tube may be the same as that of the upper part of this same tube.
  • FIG. 1 schematically represents an example of a non-limiting embodiment of a device according to the invention.
  • the device is shown at the end of the first step, that is to say at the end of the mounting of the part forming an extension 1 on the lower part 2b of the tube 2.
  • This lower tube 2b can be composed of several elements, for example, such as those used to constitute a casing.
  • the extension 1 comprises a tube 8 which can be composed of several elements, for example, such as those used for oil production conduits (often designated by the English term "tubing").
  • first connector 9 At the second end of the extension is placed a first socket 13 of a first connector 9.
  • This first connector 9 has a second socket 14 which is connected to the surface by a first electrical cable 29.
  • the intervention member 3 is provided with a third socket 4 belonging to a second electrical connector 5 possibly having several contacts.
  • the reference 6 designates the fourth socket of this connector 5. This can be surmounted by a load or ballast bar 7.
  • the third socket is a male socket and the fourth a socket female, this is by no means limiting.
  • a locking system for example electro-hydraulic or mechanical, maintains the third socket 4 on the fourth socket 6 after connection.
  • the fourth socket 6 of the second connector 5 is connected to the first socket 13 of the first connector 9 by means of a second electric cable 10.
  • first socket 13 is a male plug and the second a female socket 14, but this is in no way limiting.
  • the first and second connectors (9 and 5) may have several electrical contacts.
  • the first connector can be fixed to a tubular support element 11 which is integral with the upper end of the tubular extension 1, this tubular element being open at its upper part and comprising at its lower part a support piece or base 12 equipped with an anchoring system.
  • the second outlet 14 can be surmounted by a load or ballast bar 15.
  • An anchoring system either mechanical (for example shearable washers adapted to the socket 14 and cooperating with retaining members integral with the tube 11), or electro-hydraulic (anchoring corners actuated by remote-controlled motor), provides a mechanical connection between the bar 15 and the base 12 when the electrical contact is made between the first socket 13 and the second socket 14.
  • the assembly formed by the second socket 14 and the load bar 15 is fixed to the lower end of a cable 29 (FIG. 2) containing electrical supply and transmission conductors connecting the instrument 3 to the surface.
  • the base 12 of the tubular support element 11 is provided with an anchoring system which can be of any known type, for example electro-hydraulic or mechanical.
  • the system is entirely mechanical, it includes a groove 16 cooperating with retaining lugs 16a. This system makes it possible to maintain the tubular element in a first position, shown in FIG. 1, where a first shoulder is located below a high stop which can be formed by a second internal shoulder 17 of the lower tube 2b (FIG. 2A ), at a sufficient distance from it so that the anchoring system can be unlocked by lifting the base 12 (see below).
  • the tubular support element 11 When the groove 16 is released from the retaining pins 16a, the tubular support element 11 can be placed in the “low” position, either under the effect of gravity, or under the effect of the pressure of a fluid possibly originating from the surface. In the latter case, the extension will be provided with a piston 18. However, it would not go beyond the scope of the present invention by creating a constriction 31 at the lower part of the lower tube, so as to create a pressure difference on the part and other of this throttle 31 when the tube is pressurized from the surface. This pressure difference is then exerted on the cross section of the extension and causes it to move. Thus, it is the extension itself which forms a piston (see Figure 12).
  • the mechanical type anchoring system may include a W-shaped groove 16 formed in the external wall of the base 12 of the tubular support element 11, this base 12 being able to rotate around a vertical axis with respect to the lower tube around the axis of the latter.
  • the aforementioned assembly can then be moved by gravity or by pumping to its extreme position for which the piston 18 abuts against the shoulder 19.
  • the base 12 could include an electro-hydraulic remote controlled anchoring system then the surface.
  • the reference 2a designates the upper tube, it can be composed of several elements assembled together, such as those used in drill pipes.
  • FIG. 2 shows the assembly constituted by the extension 1, the mobile support 11, the connectors 5 and the intervention member 3 in an intermediate working position.
  • FIG. 3 illustrates the end of the first step according to which the lower tube 2 is introduced into the well 21, then the intervention member 3 is fixed at the end of the first element of the tubular extension 1, this operation being performed on the surface.
  • the other elements forming the extension are finally fixed to each other so that the intervention member 3 reaches the lower end of the lower tube 2.
  • the end of the lower tube 2b may be provided with a protective cover 32 of the intervention member 3.
  • the female socket 6 surmounted by the load bar 7 is introduced inside the tubular extension 1 and is lowered until it connects with the male socket 4.
  • the connection electrical thus performed can be controlled and provided by techniques already known which have already been discussed previously in this text.
  • the assembly constituted by the piston 18, the movable support element 11 and the male plug 13 is fixed to the upper end of the extension (see FIG. 4).
  • a fitting is optionally fixed to the upper end of the lower tube 2b, so as to allow the positioning of the upper tube 2a (see FIG. 5).
  • the different elements making up the upper tube 2a are fixed to each other, thus causing greater penetration of the lower tube 2b into the well 21.
  • the upper tube 2a is connected at its upper part to a pipe 22 for supplying pressurized hydraulic fluid and is provided at its top with a safety shutter or cable gland 23 in which the cable 29 supporting the assembly formed by the load bar 15 and the second socket 14 until the latter comes to be connected to the first socket 13 fixed on the base 12 of the tubular element 11 which supports the instrument 3, the element- tubular support 11 ensuring guidance of the assembly 14-15 to facilitate this connection (see FIG. 6).
  • Electro-hydraulic or mechanical interlocking or connecting members 24 and 25 are respectively adapted to the second socket 14 and to the internal wall of the tube 11, these members being adapted to be released from one another by traction sufficient exerted on the cable 29 from the surface.
  • the members 24 and 25 respectively consist of a shear washer carried by the second socket 14 or the load bar 15 and arms or knives for retaining this washer , carried by the tubular support element 11 (see FIG. 2A).
  • the cable 29 is unwound from the surface from a winch 26. Between the winch 26 and the shutter 23, the cable 29 passes over the return pulleys 27 and 28 ( Figure 6).
  • This embodiment is particularly suitable for highly deviated wells.
  • Interventions and / or measurements are then carried out by moving the probe into the overflow of the well (see Figure 7). These measurements can be carried out either by pumping the hydraulic fluid which pushes the extension 1 to make it penetrate deeper into the well, or by pulling on the cable 29.
  • Measurements can be made while the intervention unit approaches the lower tube (see Figure 7). Of course, in the latter case, the probe will have been removed from the desired length before the measurements are taken.
  • An opening 30 may be provided in the vicinity from the lower end of the lower tube 2b. This opening 30 will allow the circulation of a fluid after the piston 18 has passed to its level.
  • the extension 1 when the device is equipped with a throttle 31, the extension 1 can be provided with a first orifice 33 placed in communication with a second orifice 34, these two orifices being arranged so that the circulation of the fluid s' establish substantially once the extension is in abutment, the probe being extended.
  • the first orifice 33 can also be placed in communication with a third orifice 35 located in the vicinity of the intervention instrument 3, so as to allow circulation of the fluid in the lower part of the well.
  • the various orifices 30, 33, 34 and 35 will be dimensioned so as to maintain sufficient differential pressures to allow the displacement of the extension 1 by pumping.
  • FIG. 13 represents another embodiment according to which the electrical connection is carried out by a first cable 29 provided with a socket 14 which enters the extension 1 to connect to the socket 13 which is housed in the extension 1.
  • the socket 13 is located directly on the instrument 3.
  • the outlet 14 is pumped from the surface to the outlet 13 and therefore must be pumped through different passage sections.
  • Means such as a clearance 37 made in the vicinity of the lower end of the lower tube 2b, may allow better circulation of the pumping fluid once the action of the wandering piston ceases.
  • Such a device may include means for anchoring and de-anchoring the socket 14 on the extension. These means may be located in the vicinity of the instrument 3 and preferably be of the electro-hydraulic type remotely controlled from the surface.
  • extension 1 may be composed of several tubular elements each comprising electrical connectors, these elements ensuring the electrical and mechanical connection between the probe 3 and the socket of the connector 9.

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  • Engineering & Computer Science (AREA)
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  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
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  • Rigid Pipes And Flexible Pipes (AREA)

Description

La présente invention concerne une méthode et un dispositif permettant d'effectuer des mesures ou/et interventions dans un puits au niveau des formations environnantes.The present invention relates to a method and a device for carrying out measurements or / and interventions in a well at the level of the surrounding formations.

L'invention est notamment applicable lorsqu'il s'agit d'effectuer des mesures et/ou interventions au niveau de formations géologiques. Dans ce cas, les mesures effectuées peuvent comporter l'enregistrement de la pression et de la température du fond, la mesure (focalisée ou non) de la résistivité électrique, ainsi que des mesures acoustiques, nucléaires, etc...The invention is particularly applicable when it is a question of carrying out measurements and / or interventions at the level of geological formations. In this case, the measurements carried out may include the recording of the pressure and the temperature of the bottom, the measurement (focused or not) of the electrical resistivity, as well as acoustic, nuclear measurements, etc.

Ces techniques de mesure et d'intervention sont bien connues des spécialistes et ne seront pas décrites ici plus en détail.These measurement and intervention techniques are well known to specialists and will not be described here in more detail.

Les mesures pourront être complétées par la visualisation des parois du puits par des caméra de télévision, par exemple.The measurements may be supplemented by viewing the walls of the well by television cameras, for example.

On connaît déjà par le brevet US-A 4 349 072 un dispositif permettant d'effectuer des mesures ou/et interventions dans un puits, ce dispositif comportant un tube ouvert à son extrémité inférieure et d'un diamètre inférieur à celui du puits, un instrument de mesure ou d'intervention (sonde), déplaçable par télécommande depuis la surface entre une première position où ledit instrument est logé dans la partie inférieure du tube formant carter de protection et une seconde position où ledit instrument sort au moins partiellement dudit tube à l'extrémité inférieure de celui-ci, pour permettre la mesure ou l'intervention, et un câble de transmission électrique équipé d'un premier organe de connexion électrique adapté à être déplacé dans le tube pour venir se raccorder à un second organe de connexion électrique relié audit instrument. Selon ce brevet, le tube équipé de la sonde est descendu dans le puits, puis une extension est envoyée depuis la surface vers la sonde à laquelle elle se fixe. L'ensemble ainsi constitué (sonde plus extension) est alors pompé pour faire progresser la sonde le long de la zone à explorer.Already known from US-A 4 349 072 a device for performing measurements or / and interventions in a well, this device comprising a tube open at its lower end and with a diameter less than that of the well, a measuring or intervention instrument (probe), movable by remote control from the surface between a first position where said instrument is housed in the lower part of the tube forming a protective casing and a second position where said instrument leaves at least partially from said tube the lower end thereof, to allow measurement or intervention, and an electrical transmission cable equipped with a first electrical connection member adapted to be moved in the tube to come and connect to a second connection member electric connected to said instrument. According to this patent, the tube fitted with the probe is lowered into the well, then an extension is sent from the surface to the probe to which it attaches. The assembly thus formed (probe plus extension) is then pumped to advance the probe along the area to be explored.

Un tel dispositif nécessite donc la descente depuis la surface d'une extension plus ou moins longue suivant l'étendue de la zone du puits à explorer. En outre, plus la zone à explorer est lointaine, plus la longueur sur laquelle il faut acheminer l'extension est longue. De ce fait, le tube est immobilisé dans sa position basse durant de longues périodes. Ceci représente des risques importants de coincement du tube dans le puits. Ces risques sont accrus si le puits est dévié par rapport à la verticale.Such a device therefore requires the descent from the surface of a more or less long extension depending on the extent of the area of the well to be explored. In addition, the further the area to be explored, the longer the length over which the extension must be routed. As a result, the tube is immobilized in its low position for long periods. This poses significant risks of the tube becoming trapped in the well. These risks are increased if the well is deviated from the vertical.

Par l'expression «puits déviés» on désigne ici, ainsi que dans le reste de la description, aussi bien les puits faiblement déviés que les puits fortement déviés ou sensiblement horizontaux.By the expression "deviated wells" is meant here, as in the rest of the description, both the well deviated wells as well as the strongly deviated or substantially horizontal wells.

A noter que la présente invention peut être également utilisée sur les portions verticales des puits.Note that the present invention can also be used on the vertical portions of the wells.

L'art antérieur peut être également illustré par les brevets américains US-A 4064939, 4082144 et 4388969 ainsi que par la demande de brevet européen EP-A 0 077 275.The prior art can also be illustrated by American patents US-A 4064939, 4082144 and 4388969 as well as by European patent application EP-A 0 077 275.

Ce document décrit une méthode qui nécessite l'envoi de l'extension par pompage à travers un tube depuis la surface jusqu'à l'endroit où doivent être effectuées des mesures.This document describes a method which requires the extension to be pumped through a tube from the surface to the place where measurements are to be made.

Les inconvénients des dispositifs selon l'art antérieur sont considérablement réduits si ce n'est éliminés par l'utilisation de la méthode et du dispositif selon la présente invention pour effectuer des mesures ou/et interventions dans un puits.The drawbacks of the devices according to the prior art are considerably reduced if not eliminated by the use of the method and the device according to the present invention for carrying out measurements or / and interventions in a well.

Cette méthode utilise au moins un tube comportant au moins deux parties l'une dite supérieure et l'autre inférieure, une extension éventuellement tubulaire ayant deux extrémités l'une dite supérieure et l'autre inférieure et un instrument de mesure ou/et d'intervention fixé à l'extrémité inférieure de l'extension.This method uses at least one tube comprising at least two parts, one called upper and the other lower, a possibly tubular extension having two ends, one called upper and the other lower, and a measuring instrument or / and intervention fixed at the lower end of the extension.

Chacune des deux parties du tube ainsi que l'extension peut comporter plusieurs éléments.Each of the two parts of the tube and the extension can have several elements.

La méthode selon l'invention comporte successivement les étapes suivantes:

  • a) le montage de ladite extension équipée de l'instrument sur la partie inférieure du tube,
  • b) le montage de la partie supérieure du tube au-dessus de la partie inférieure du tube, cette étape s'accompagnant d'une pénétration plus grande dans le puits de l'ensemble constitué du tube inférieur de l'extension et de l'instrument,
  • c) le déplacement de l'extension relativement au tube, jusqu'à une position dudit instrument permettant les mesures ou/et interventions.
The method according to the invention successively comprises the following steps:
  • a) mounting said extension equipped with the instrument on the lower part of the tube,
  • b) mounting the upper part of the tube above the lower part of the tube, this step being accompanied by greater penetration into the well of the assembly consisting of the lower tube of the extension and of the instrument,
  • c) displacement of the extension relative to the tube, to a position of said instrument allowing the measurements or / and interventions.

Une première variante de la méthode suivant l'invention est applicable lorsque l'instrument est relié électriquement à la surface, et qu'il comporte un premier connecteur comportant une première et une deuxième prises électriques, ces deux prises électriques étant éventuellement enfichables en milieu liquide et du type multicontact, ladite première prise étant en utilisation normale fixe par rapport à l'extension.A first variant of the method according to the invention is applicable when the instrument is electrically connected to the surface, and when it comprises a first connector comprising first and second electrical outlets, these two electrical outlets possibly being pluggable in liquid medium and of the multicontact type, said first socket being in normal use fixed with respect to the extension.

Selon cette variante, on met en ceuvre l'étape supplémentaire suivante:

  • - on introduit la deuxième prise dans le tube jusqu'à la première prise et on connecte entre elles les dites prises électriques, ladite deuxième prise étant fixée mécaniquement et électriquement à l'extrémité inférieure d'un premier câble de transmission électrique, ce câble étant relié à son extrémité supérieure aux installations de surface.
According to this variant, the following additional step is implemented:
  • - the second socket is introduced into the tube up to the first socket and the said electrical sockets are connected together, said second socket being fixed mechanically and electrically to the lower end of a first electrical transmission cable, this cable being connected at its upper end to surface installations.

A la fin de cette étape supplémentaire qui se situe après l'étape c) définie ci-dessus, la deuxième prise est rendue solidaire de l'extension.At the end of this additional step which is located after step c) defined above, the second grip is made integral with the extension.

La variante précédente peut être complétée par d'autres étapes. Ainsi, lorsque la méthode est appliquée au cas où l'instrument est relié électriquement à la première prise par une liaison électrique intermédiaire comportant un deuxième connecteur qui comprend une troisième et une quatrième prises électriques, ces deux prises étant éventuellement enfichables en milieu liquide et du type multicontact, lorsque la troisième prise est reliée électriquement à l'instrument et qu'elle est fixe par rapport à l'extension de préférence au voisinage de son extrémité inférieure, on peut procéder à l'étape supplémentaire suivante:

  • - on introduit la quatrième prise dans l'extension et on la connecte avec la troisième prise, ladite troisième prise étant fixée mécaniquement et électriquement à l'extrémité inférieure d'un deuxième câble de transmission électrique, ce câble étant relié à son extrémité supérieure à ladite première prise du premier connecteur.
The previous variant can be completed with other steps. Thus, when the method is applied to the case where the instrument is electrically connected to the first outlet by an intermediate electrical connection comprising a second connector which comprises a third and a fourth electrical outlets, these two outlets possibly being pluggable in liquid medium and multicontact type, when the third socket is electrically connected to the instrument and when it is fixed relative to the extension preferably near its lower end, we can proceed to the following additional step:
  • - the fourth socket is introduced into the extension and it is connected with the third socket, said third socket being fixed mechanically and electrically to the lower end of a second electrical transmission cable, this cable being connected at its upper end to said first socket of the first connector.

A la fin de cette étape supplémentaire qui se situe entre l'étape a) et l'étape b) définies ci-dessus, ladite quatrième prise est éventuellement rendue solidaire de l'extension, au voisinage de son extrémité inférieure.At the end of this additional step which is situated between step a) and step b) defined above, said fourth socket is optionally made integral with the extension, in the vicinity of its lower end.

Il est possible suivant la méthode selon l'invention que l'une au moins des deuxième et quatrième prises électriques soit déplacée par pompage, notamment lorsque la méthode est mise en oeuvre dans des puits déviés.It is possible according to the method according to the invention that at least one of the second and fourth electrical outlets is moved by pumping, in particular when the method is implemented in deviated wells.

Selon l'invention certains au moins des déplacements de l'extension pourront être provoqués par pompage d'un fluide tel que gaz, liquide, liquide plus boue, fluide diphasique etc...According to the invention, at least some of the displacements of the extension can be caused by pumping a fluid such as gas, liquid, liquid plus mud, two-phase fluid, etc.

Il sera également possible de provoquer certains des déplacements de l'extension, notamment sa rentrée dans la tube, par une traction exercée sur le premier câble électrique.It will also be possible to cause some of the displacement of the extension, in particular its re-entry into the tube, by a traction exerted on the first electric cable.

A la fin d'un déplacement de l'extension correspondant à l'intervention dudit instrument sur une première zone du puits, il sera possible, selon l'invention, de rentrer l'extension dans le tube, dans la position initiale occupée par cette extension, avant l'étape c) définie plus haut et de modifier la longueur du tube supérieur pour permettre le déplacement dudit instrument jusqu'au voisinage de la nouvelle zone d'intervention.At the end of a displacement of the extension corresponding to the intervention of said instrument on a first zone of the well, it will be possible, according to the invention, to return the extension in the tube, in the initial position occupied by this extension, before step c) defined above and to modify the length of the upper tube to allow the movement of said instrument to the vicinity of the new intervention area.

Dans ce cas, il pourra être avantageux, pour des raisons pratiques, de retirer la deuxième prise ainsi que le premier câble du tube supérieur avant de modifier la longueur de ce dernier. La premier câble pourra éventuellement pénétrer dans le tube supérieur par un raccord à fenêtre latérale.In this case, it may be advantageous, for practical reasons, to remove the second plug as well as the first cable from the upper tube before modifying the length of the latter. The first cable can possibly enter the upper tube through a side window connection.

Il est possible suivant la méthode selon l'invention, de laisser l'extension suspendue au tube inférieur en position sortie lors de la pénétration du tube dans le puits ou pendant l'assemblage du tube inférieur notamment lorsque celui-ci est composé de plusieurs éléments. Le fait de laisser l'extension suspendue permet d'avoir un diamètre extérieur de la sonde supérieure au diamètre intérieur du tube inférieur.It is possible according to the method according to the invention, to leave the extension suspended from the lower tube in the extended position during penetration of the tube into the well or during assembly of the lower tube, in particular when the latter is composed of several elements. . Leaving the extension suspended allows an outside diameter of the probe greater than the inside diameter of the lower tube.

Il est également possible de monter le tube inférieur et l'extension en même temps ceci à condition que ces deux organes soient constitués de plusieurs éléments coaxiaux deux à deux et sensiblement de même longueur.It is also possible to mount the lower tube and the extension at the same time this provided that these two members consist of several coaxial elements two by two and substantially the same length.

La présente invention propose également un dispositif pour effectuer des mesures ou/et des interventions dans un puits. Ce dispositif comporte au moins un tube et une extension éventuellement tubulaire ayant deux extrémités l'une dite inférieure et l'autre supérieure, ledit tube étant adapté à supporter ladite extension et comportant au moins deux parties, l'une dite supérieure et l'autre inférieure, chacune de ces deux parties ainsi que l'extension pouvant comporter plusieurs éléments.The present invention also provides a device for carrying out measurements or / and interventions in a well. This device comprises at least one tube and an optionally tubular extension having two ends, one called lower and the other upper, said tube being adapted to support said extension and comprising at least two parts, one called upper and the other lower, each of these two parts as well as the extension may include several elements.

Dans ce dispositif, ledit instrument est solidaire de l'extrémité inférieure de l'extension et le dispositif comporte des moyens d'ancrage de ladite extension sur la partie inférieure du tube, ces moyens étant déverrouillables à partir de la surface et des moyens permettant le déplacement de l'extension relativement au tube.In this device, said instrument is integral with the lower end of the extension and the device comprises means for anchoring said extension on the lower part of the tube, these means being unlockable from the surface and means allowing the displacement of the extension relative to the tube.

Les moyens d'ancrage peuvent être par exemple mécaniques, électrohydrauliques ou de tout autre type connu. Un premier mode de réalisation du dispositif est applicable au cas où l'instrument est relié électriquement à un premier connecteur électrique qui comprend une première et une deuxième prises électriques, ladite première prise étant fixe par rapport à l'extension.The anchoring means can be, for example mechanical, electro-hydraulic or any other known type. A first embodiment of the device is applicable to the case where the instrument is electrically connected to a first electrical connector which comprises first and second electrical outlets, said first outlet being fixed relative to the extension.

Ce mode de réalisation est caractérisé en ce qu'il comporte un premier câble de transmission électrique dont l'extrémité inférieure est fixée mécaniquement et électriquement à ladite deuxième prise et dont l'extrémité supérieure est reliée aux installations de surface et en ce que ladite deuxième prise comporte à son voisinage des moyens d'accrochage qui coopèrent avec des moyens complémentaires disposés au voisinage de l'extrémité supérieure de l'extension.This embodiment is characterized in that it comprises a first electrical transmission cable whose lower end is mechanically and electrically fixed to said second socket and whose upper end is connected to surface installations and in that said second socket has in its vicinity attachment means which cooperate with complementary means arranged in the vicinity of the upper end of the extension.

Ce premier connecteur peut être localisé à n'importe quel endroit de l'extension. Toutefois, il sera avantageux de le placer soit au voisinage de l'extrémité supérieure de la sonde, car cela évite d'avoir à déplacer la deuxième prise à l'intérieur de l'extension qui est d'un diamètre différent de celui du tube inférieur, soit au voisinage de l'instrument.This first connector can be located anywhere in the extension. However, it will be advantageous to place it either near the upper end of the probe, as this avoids having to move the second socket inside the extension which is of a different diameter from that of the tube. lower, ie in the vicinity of the instrument.

Cette dernière solution permet d'éviter l'utilisation d'une longue liaison électrique intermédiaire entre l'instrument et la première prise du connecteur. D'ailleurs, dans ce cas, la première prise peut être placée directement sur l'instrument.This latter solution avoids the use of a long intermediate electrical connection between the instrument and the first socket of the connector. Besides, in this case, the first grip can be placed directly on the instrument.

Enfin, il est également possible d'utiliser un piston baladeur qui facilitera le pompage de la deuxième prise dans le tube, ce piston pourra coopérer éventuellement avec un dégagement pratiqué dans le tube sensiblement à l'endroit où doit cesser son action.Finally, it is also possible to use a sliding piston which will facilitate the pumping of the second socket in the tube, this piston may possibly cooperate with a clearance made in the tube substantially at the place where its action must cease.

Un deuxième mode de réalisation, complétant le premier, est applicable lorsque l'on relie électriquement l'instrument et la première prise en utilisant un deuxième connecteur comprenant une troisième prise et une quatrième prise, ladite troisième prise étant solidaire de l'extension au voisinage de son extrémité inférieure.A second embodiment, supplementing the first, is applicable when the instrument and the first socket are electrically connected using a second connector comprising a third socket and a fourth socket, said third socket being integral with the extension in the vicinity from its lower end.

Ce deuxième mode de réalisation est caractérisé en ce qu'il comporte un deuxième câble de transmission électrique dont l'extrémité inférieure est fixée mécaniquement et électriquement à ladite quatrième prise et dont l'extrémité supérieure est reliée à la première prise.This second embodiment is characterized in that it comprises a second electric transmission cable whose lower end is mechanically and electrically fixed to said fourth socket and whose upper end is connected to the first socket.

Aussi bien la deuxième que la quatrième prises peuvent être munies de moyens permettant leur déplacement par pompage de fluide depuis la surface.Both the second and the fourth sockets can be provided with means allowing their displacement by pumping fluid from the surface.

Le dispositif selon l'invention peut comporter des moyens permettant le déplacement de l'extension par pompage de fluide depuis la surface.The device according to the invention may include means for moving the extension by pumping fluid from the surface.

Ainsi l'extension pourra être équipée d'un piston ou passer à travers un étranglement solidaire du tube inférieur, cet étranglement créant une différence de pression suffisante pour mouvoir l'extension.Thus the extension can be fitted with a piston or pass through a constriction secured to the lower tube, this constriction creating a pressure difference sufficient to move the extension.

L'extension pourra être muni d'orifices permettant la circulation d'un fluide de la zone située en amont du piston ou de l'étranglement vers la zone située en aval.The extension may be provided with orifices allowing the circulation of a fluid from the zone situated upstream from the piston or from the constriction towards the zone situated downstream.

L'orifice de sortie du fluide pourra être situé au voisinage de la sonde, ou être positionné de tel sorte qu'il ne permette la circulation du fluide que lorsque l'extension a atteint des positions prédéterminées, cet orifice étant situé par exemple au voisinage de la position occupée par la sonde lorsque cette dernière est sortie au maximum. Bien entendu, les sections de passage de ces orifices ou plus généralement les pertes de charge de ces voies de circulation du fluide seront déterminées pour permettre de sortir l'extension de la longueur souhaitée sous l'action des efforts de pression.The fluid outlet orifice may be located in the vicinity of the probe, or be positioned in such a way that it allows the circulation of the fluid only when the extension has reached predetermined positions, this orifice being situated for example in the vicinity from the position occupied by the probe when the latter is extended to the maximum. Of course, the passage sections of these orifices or more generally the pressure losses of these fluid circulation paths will be determined to allow the extension of the desired length to be released under the action of pressure forces.

L'extension devra avoir une rigidité suffisante pour pouvoir déplacer l'instrument dans le puits.The extension must have sufficient rigidity to be able to move the instrument in the well.

Selon un autre mode de réalisation l'extension pourra être composée de plusieurs éléments tubulaires dont chacun comporte des connecteurs électriques, ces éléments assurant la liaison électrique et mécanique entre l'instrument et le premier connecteur.According to another embodiment, the extension may be composed of several tubular elements, each of which comprises electrical connectors, these elements ensuring the electrical and mechanical connection between the instrument and the first connector.

Les déplacements de l'extension pour la faire rentrer dans le tube sont obtenus en exerçant une traction sur le premier câble électrique qui dans ce cas aura une résistance mécanique suffisante pour supporter de tels efforts.The displacements of the extension to make it enter the tube are obtained by exerting traction on the first electric cable which in this case will have sufficient mechanical strength to withstand such efforts.

La deuxième ou la quatrième prise électrique pourra être équipée d'organes d'accrochage déverrouillables. Ces organes pourront être mécaniques, électro-hydrauliques ou de tous autres types connus. Dans le cas où ces organes comporteraient des rondelles cisaillables, les câbles électriques auraient les caractéristiques mécaniques appropriées pour supporter les efforts de traction provoquant le cisaillement des rondelles.The second or fourth electrical outlet may be equipped with unlockable hooking members. These organs may be mechanical, electro-hydraulic or of any other known type. In the event that these members include shearable washers, the electric cables would have the appropriate mechanical characteristics to withstand the tensile forces causing shear of the washers.

Le premier câble électrique pourra pénétrer dans le tube par un raccord à fenêtre latérale (que les spécialistes désignent souvent par le terme anglo-saxon de «side entry sub»).The first electrical cable can enter the tube through a side window connection (which specialists often refer to by the English term "side entry sub").

Bien entendu, si les dimensions des moyens d'ancrage le permettent, le diamètre de la partie inférieure de tube pourra être le même que celui de la partie supérieure de ce même tube.Of course, if the dimensions of the anchoring means allow, the diameter of the lower part of the tube may be the same as that of the upper part of this same tube.

L'invention sera mieux comprise en lisant la description suivante d'un exemple de réalisation, illustré par les dessins annexés parmi lesquels:

  • - la figure 1 représente un dispositif selon l'invention lors de sa mise en place dans le puits,
  • - la figure 2 représente le dispositif dans une position intermédiaire de travail,
  • - la figure 2A est une vue de détail du dispositif au voisinage du système d'ancrage,
  • - les figures 3 à 9 illustrent les différentes phases de la mise en oeuvre du dispositif selon l'invention,
  • - les figures 10 et 11 montrent schématiquement le système d'ancrage de l'élément support respectivement dans la position de verrouillage et de déverrouillage,
  • - la figure 12 représente différentes variantes de circulation d'un fluide à travers le dispositif, et
  • - la figure 13 illustre le cas d'un dispositif utilisant un piston baladeur.
The invention will be better understood by reading the following description of an exemplary embodiment, illustrated by the appended drawings among which:
  • FIG. 1 represents a device according to the invention when it is placed in the well,
  • FIG. 2 represents the device in an intermediate working position,
  • FIG. 2A is a detailed view of the device in the vicinity of the anchoring system,
  • FIGS. 3 to 9 illustrate the different phases of the implementation of the device according to the invention,
  • FIGS. 10 and 11 schematically show the anchoring system of the support element respectively in the locked and unlocked position,
  • FIG. 12 represents different variants of circulation of a fluid through the device, and
  • - Figure 13 illustrates the case of a device using a sliding piston.

La figure 1 représente schématiquement un exemple de réalisation non limitatif d'un dispositif selon l'invention. Sur cette première figure le dispositif est représenté à la fin de la première étape c'est-à-dire à la fin du montage de la pièce formant une extension 1 sur la partie inférieure 2b du tube 2.FIG. 1 schematically represents an example of a non-limiting embodiment of a device according to the invention. In this first figure, the device is shown at the end of the first step, that is to say at the end of the mounting of the part forming an extension 1 on the lower part 2b of the tube 2.

Ce tube inférieur 2b peut être composé de plusieurs éléments, par exemple, tels ceux utilisés pour constituer un tubage.This lower tube 2b can be composed of several elements, for example, such as those used to constitute a casing.

Dans l'exemple considéré l'extension 1 comporte un tube 8 qui peut être composé de plusieurs éléments, par exemple, tels ceux utilisés pour les conduits de production de pétrole (souvent désignés par le terme anglais de «tubing»).In the example considered, the extension 1 comprises a tube 8 which can be composed of several elements, for example, such as those used for oil production conduits (often designated by the English term "tubing").

Un organe 3 d'intervention et/ou de mesure, tel une sonde de diagraphie est placé à la première extrémité ou extrémité inférieure de l'extension tubulaire 1.An intervention and / or measurement member 3, such as a logging probe, is placed at the first end or lower end of the tubular extension 1.

A la deuxième extrémité de l'extension est placée une première prise 13 d'un premier connecteur 9. Ce premier connecteur 9 comporte une deuxième prise 14 qui est reliée à la surface par un premier câble électrique 29.At the second end of the extension is placed a first socket 13 of a first connector 9. This first connector 9 has a second socket 14 which is connected to the surface by a first electrical cable 29.

L'organe d'intervention 3 est muni d'une troisième prise 4 appartenant à un deuxième connecteur électrique 5 ayant éventuellement plusieurs contacts. La référence 6 désigne la quatrième prise de ce connecteur 5. Celle-ci peut être surmontée d'une barre de charge ou de lestage 7. Dans l'exemple illustré par les figures, la troisième prise est une prise mâle et la quatrième une prise femelle, ceci n'est nullement limitatif.The intervention member 3 is provided with a third socket 4 belonging to a second electrical connector 5 possibly having several contacts. The reference 6 designates the fourth socket of this connector 5. This can be surmounted by a load or ballast bar 7. In the example illustrated by the figures, the third socket is a male socket and the fourth a socket female, this is by no means limiting.

Un système de verrouillage par exemple électro-hydraulique ou mécanique assure le maintien de la troisième prise 4 sur la quatrième prise 6 après connexion.A locking system, for example electro-hydraulic or mechanical, maintains the third socket 4 on the fourth socket 6 after connection.

La quatrième prise 6 du deuxième connecteur 5 est reliée à la première prise 13 du premier connecteur 9 par l'intermédiaire d'un deuxième câble électrique 10.The fourth socket 6 of the second connector 5 is connected to the first socket 13 of the first connector 9 by means of a second electric cable 10.

Sur les figures, la première prise 13 est une fiche mâle et la deuxième une prise 14 femelle, mais ceci n'est nullement limitatif.In the figures, the first socket 13 is a male plug and the second a female socket 14, but this is in no way limiting.

Le premier et le deuxième connecteur (9 et 5) peuvent comporter plusieurs contacts électriques.The first and second connectors (9 and 5) may have several electrical contacts.

Le premier connecteur peut être fixé à un élément-support tubulaire 11 qui est solidaire de l'extrémité supérieure de l'extension tubulaire 1, cet élément tubulaire étant ouvert à sa partie supérieure et comportant à sa partie inférieure une pièce-support ou base 12 équipée d'un système d'ancrage.The first connector can be fixed to a tubular support element 11 which is integral with the upper end of the tubular extension 1, this tubular element being open at its upper part and comprising at its lower part a support piece or base 12 equipped with an anchoring system.

La deuxième prise 14 peut être surmontée d'une barre de charge ou de lestage 15.The second outlet 14 can be surmounted by a load or ballast bar 15.

Un système d'ancrage, soit mécanique (par exemple rondelles cisaillables adaptées à la prise 14 et coopérant avec des organes de retenue solidaires du tube 11), soit électro-hydraulique (coins d'ancrage actionnés par moteur télécommandé), assure une liaison mécanique entre la barre 15 et la base 12 lorsque le contact électrique est réalisé entre la première prise 13 et la deuxième prise 14.An anchoring system, either mechanical (for example shearable washers adapted to the socket 14 and cooperating with retaining members integral with the tube 11), or electro-hydraulic (anchoring corners actuated by remote-controlled motor), provides a mechanical connection between the bar 15 and the base 12 when the electrical contact is made between the first socket 13 and the second socket 14.

L'ensemble formé par la deuxième prise 14 et la barre de charge 15 est fixé à l'extrémité inférieure d'un câble 29 (figure 2) renfermant des conducteurs électriques d'alimentation et de transmission reliant l'instrument 3 à la surface.The assembly formed by the second socket 14 and the load bar 15 is fixed to the lower end of a cable 29 (FIG. 2) containing electrical supply and transmission conductors connecting the instrument 3 to the surface.

Des exemples de connecteurs électriques utilisables pour constituer l'ensemble de la première prise 13 et de la deuxième prise 14 sont décrits dans le brevet d'invention FR-A 2484717 et dans la demande de brevet français publiée FR-A 2502408 «Connecteur électrique enfichable dans un milieu liquide», déposée le 17 mars 1981.Examples of electrical connectors which can be used to constitute the assembly of the first socket 13 and the second socket 14 are described in the invention patent FR-A 2484717 and in the published French patent application FR-A 2502408 “Pluggable electrical connector in a liquid medium ", deposited on March 17, 1981.

La base 12 de l'élément-support tubulaire 11 est munie d'un système d'ancrage qui peut être de tout type connu, par exemple électro-hydraulique ou mécanique. Dans l'exemple présenté dans les figures, le système est entièrement mécanique, il comprend une rainure 16 coopérant avec des ergots de retenue 16a. Ce système permet de maintenir l'élément tubulaire dans une première position, représentée sur la figure 1, où un premier épaulement est situé au-dessous d'une butée haute pouvant être formée par un deuxième épaulement interne 17 du tube inférieur 2b (figure 2A), à une distance suffisante de celle-ci pour que le système d'ancrage puisse être déverrouillé en soulevant la base 12 (voir ci-après).The base 12 of the tubular support element 11 is provided with an anchoring system which can be of any known type, for example electro-hydraulic or mechanical. In the example presented in the figures, the system is entirely mechanical, it includes a groove 16 cooperating with retaining lugs 16a. This system makes it possible to maintain the tubular element in a first position, shown in FIG. 1, where a first shoulder is located below a high stop which can be formed by a second internal shoulder 17 of the lower tube 2b (FIG. 2A ), at a sufficient distance from it so that the anchoring system can be unlocked by lifting the base 12 (see below).

Lorsque la rainure 16 est dégagée des ergots de retenue 16a l'élément-support tubulaire 11 peut se placer en position «basse», soit sous l'effet de la gravité, soit sous l'effet de la pression d'un fluide provenant éventuellement de la surface. Dans ce dernier cas l'extension sera munie d'un piston 18. Toutefois, on ne sortirait pas du cadre de la présente invention en créant un étranglement 31 à la partie inférieure du tube inférieur, de manière à créer une différence de pression de part et d'autre de cet étranglement 31 lorsque le tube est mis sous pression à partir de la surface. Cette différence de pression s'exerce alors sur la section droite de l'extension et provoque son déplacement. Ainsi, c'est l'extension elle-même qui forme un piston (voir figure 12).When the groove 16 is released from the retaining pins 16a, the tubular support element 11 can be placed in the “low” position, either under the effect of gravity, or under the effect of the pressure of a fluid possibly originating from the surface. In the latter case, the extension will be provided with a piston 18. However, it would not go beyond the scope of the present invention by creating a constriction 31 at the lower part of the lower tube, so as to create a pressure difference on the part and other of this throttle 31 when the tube is pressurized from the surface. This pressure difference is then exerted on the cross section of the extension and causes it to move. Thus, it is the extension itself which forms a piston (see Figure 12).

Comme le montrent schématiquement les figures 10 et 11, le système d'ancrage du type mécanique pourra comporter une rainure 16 en forme de W ménagée dans la paroi externe de la base 12 de l'élément-support tubulaire 11, cette base 12 pouvant tourner autour d'un axe vertical par rapport au tube inférieur autour de l'axe de ce dernier.As schematically shown in Figures 10 and 11, the mechanical type anchoring system may include a W-shaped groove 16 formed in the external wall of the base 12 of the tubular support element 11, this base 12 being able to rotate around a vertical axis with respect to the lower tube around the axis of the latter.

Dans la position haute représentée sur les figures 1 et 10, le bord supérieur du sommet de cette rainure est soutenu par un ergot 16a solidaire de la paroi interne du tube inférieur 2b.In the high position shown in Figures 1 and 10, the upper edge of the top of this groove is supported by a lug 16a secured to the inner wall of the lower tube 2b.

En soulevant légèrement l'ensemble 11-12-13-14-15 par une traction F, exercée sur le câble 29 à partir de la position représentée sur la figure 10, l'encoche 16b à la partie supérieure de la rainure 16 est dégagée de l'ergot 16a. Le bord inférieur 16c de la rainure 16 s'appuie alors sur cet ergot, provoquant une rotation de la base 12 qui place le bord supérieur 16d de la rainure 16 en regard de l'ergot.By slightly lifting the assembly 11-12-13-14-15 by a pull F, exerted on the cable 29 from the position shown in Figure 10, the notch 16b at the upper part of the groove 16 is released of lug 16a. The lower edge 16c of the groove 16 then rests on this lug, causing a rotation of the base 12 which places the upper edge 16d of the groove 16 opposite the lug.

En relâchant la traction F, le bord 16d vient en appui sur l'ergot 16a, entraînant la rotation de la base 12 jusqu'à son dégagement de l'ergot 16a à travers l'ouverture 16e (figure 11).By releasing the traction F, the edge 16d comes to bear on the lug 16a, causing the rotation of the base 12 until its release from the lug 16a through the opening 16e (FIG. 11).

L'ensemble précité peut être alors déplacé par gravité ou par pompage jusqu'à sa position extrême pour laquelle le piston 18 bute contre l'épaulement 19. Au lieu du système d'ancrage entièrement mécanique décrit ci-dessus, la base 12 pourrait comporter un système d'ancrage électro-hydraulique télécommandé puis la surface.The aforementioned assembly can then be moved by gravity or by pumping to its extreme position for which the piston 18 abuts against the shoulder 19. Instead of the fully mechanical anchoring system described above, the base 12 could include an electro-hydraulic remote controlled anchoring system then the surface.

La référence 2 a désigne le tube supérieur, celui-ci peut être composé de plusieurs éléments assemblés entre eux, tels ceux utilisés dans les tiges de forage.The reference 2a designates the upper tube, it can be composed of several elements assembled together, such as those used in drill pipes.

La figure 2 montre l'ensemble constitué par l'extension 1, le support mobile 11, les connecteurs 5 et l'organe d'intervention 3 dans une position de travail intermédiaire.FIG. 2 shows the assembly constituted by the extension 1, the mobile support 11, the connectors 5 and the intervention member 3 in an intermediate working position.

La mise en oeuvre de ce dispositif est indiquée ci-dessous, en se référant aux figures 3 à 9 qui montrent les étapes successives de cette technique.The implementation of this device is indicated below, with reference to Figures 3 to 9 which show the successive stages of this technique.

La figure 3 illustre la fin de la première étape suivant laquelle on introduit le tube inférieur 2 dans le puits 21, puis on fixe l'organe d'intervention 3 à l'extrémité du premier élément de l'extension tubulaire 1, cette opération étant effectuée en surface. Les autres éléments formant l'extension sont enfin fixés les uns aux autres de telle sorte que l'organe d'intervention 3 atteigne l'extrémité inférieur du tube inférieur 2.FIG. 3 illustrates the end of the first step according to which the lower tube 2 is introduced into the well 21, then the intervention member 3 is fixed at the end of the first element of the tubular extension 1, this operation being performed on the surface. The other elements forming the extension are finally fixed to each other so that the intervention member 3 reaches the lower end of the lower tube 2.

Il est avantageux de garder le plus longtemps possible l'organe d'intervention 3 à l'intérieur du tube inférieur de manière à éviter tout risque d'endommagement de cet organe.It is advantageous to keep the intervention member 3 as long as possible inside the lower tube so as to avoid any risk of damage to this member.

D'ailleurs, l'extrémité du tube inférieur 2b pourra être munie d'un cache protecteur 32 de l'organe d'intervention 3.Moreover, the end of the lower tube 2b may be provided with a protective cover 32 of the intervention member 3.

A la fin de cette première étape la prise femelle 6 surmontée de la barre de charge 7 est introduite à l'intérieur de l'extension tubulaire 1 et est descendue jusqu'à ce qu'elle se connecte avec la prise mâle 4. La connexion électrique ainsi effectué pouvant être controlée et assurée par des techniques déjà connues dont il a déjà été question précédemment dans ce texte.At the end of this first step, the female socket 6 surmounted by the load bar 7 is introduced inside the tubular extension 1 and is lowered until it connects with the male socket 4. The connection electrical thus performed can be controlled and provided by techniques already known which have already been discussed previously in this text.

L'ensemble constitué par le piston 18, l'élément-support mobile 11 et la fiche mâle 13 est fixé à l'extrémité supérieure de l'extension (voir figure 4).The assembly constituted by the piston 18, the movable support element 11 and the male plug 13 is fixed to the upper end of the extension (see FIG. 4).

On ne sortira pas du cadre de la présente invention en introduisant l'extension dans le puits en la laissant pendre à l'extrémité inférieure de la partie inférieure 2b du tube 2 (voir figure 3A). Cette variante permet d'utiliser un tube inférieur 2b dont le diamètre intérieur est inférieur au diamètre extérieur de la sonde 3. Il est possible selon cette variante d'introduire un câble équipé d'un système d'accrochage de manière à faire rentrer l'extension 1 dans le tube inférieur 2b et la sonde 3 dans son éventuel carter protecteur 32. Cette opération est effectuée de préférence une fois que le tube inférieur 2b est mis en place.It will not depart from the scope of the present invention to introduce the extension into the well by letting it hang at the lower end of the lower part 2b of the tube 2 (see FIG. 3A). This variant makes it possible to use a lower tube 2b whose internal diameter is less than the external diameter of the probe 3. It is possible according to this variant to introduce a cable equipped with a hooking system so as to bring the extension 1 in the lower tube 2b and the probe 3 in its possible protective casing 32. This operation is preferably carried out once the lower tube 2b is put in place.

Il sera possible suivant l'invention de monter l'extension 1 et le tube inférieur 2b en même temps, ceci à condition que ces deux organes soient constitués d'éléments coaxiaux deux à deux et ayant sensiblement la même longueur.According to the invention, it will be possible to mount the extension 1 and the lower tube 2b at the same time, provided that these two members are made up of coaxial elements in pairs and having substantially the same length.

Si lors de la pénétration de l'ensemble constitué par le tube inférieur 2b et de l'extension dans le puits, celle-ci rencontrait une obstruction ou une partie suffisamment déviée pour gêner sa progression, elle s'immobiliserait et serait progressivement recouverte par le tube inférieur au fur et à mesure de l'avancement de ce dernier. Puis une fois que l'extension sera entièrement recouverte c'est le tube inférieur 2b qui forcera le passage à travers l'obstruction. Ainsi, l'instrument n'aura pas à supporter des contraintes pouvant l'endommager.If during the penetration of the assembly constituted by the lower tube 2b and the extension into the well, the latter encountered an obstruction or a part sufficiently deviated to hinder its progress, it would come to a standstill and would be gradually covered by the lower tube as the latter progresses. Then once the extension is fully covered it is the lower tube 2b which will force the passage through the obstruction. Thus, the instrument will not have to withstand stresses that can damage it.

Bien entendu, dans le cas où l'on utilise une liaison électrique intermédiaire par un deuxième câble et un deuxième connecteur, celui-ci sera avantageusement introduit alors que l'extrémité supérieure de l'extension se trouve en surface avant la pénétration du tube inférieur 2b dans le puits.Of course, in the case where an intermediate electrical connection is used by a second cable and a second connector, the latter will advantageously be introduced while the upper end of the extension is on the surface before the penetration of the lower tube. 2b in the well.

Un raccord est éventuellement fixé à l'extrémité supérieure du tube inférieur 2b, de manière à permettre la mise en place du tube supérieur 2a (voirfigure 5).A fitting is optionally fixed to the upper end of the lower tube 2b, so as to allow the positioning of the upper tube 2a (see FIG. 5).

Les différents éléments composant le tube supérieur 2a sont fixés les uns aux autres, provoquant ainsi une plus grande pénétration du tube inférieur 2b dans le puits 21.The different elements making up the upper tube 2a are fixed to each other, thus causing greater penetration of the lower tube 2b into the well 21.

Cette opération se poursuit jusqu'à ce que l'organe d'intervention 3 atteigne sensiblement la position à partir de laquelle on souhaite effectuer des interventions. A ce moment, on introduit dans le tube supérieur 2a la prise femelle 14 qui est fixée à l'extrémité du câble 16 éventuellement en insérant une barre de charge 15.This operation continues until the intervention member 3 substantially reaches the position from which it is desired to carry out interventions. At this time, the socket 14 which is fixed to the end of the cable 16 is optionally inserted into the upper tube 2a, possibly by inserting a load bar 15.

Le tube supérieur 2a est relié à sa partie supérieure à une canalisation 22 d'alimentation en fluide hydraulique sous pression et est muni à son somment d'un obturateur de sécurité ou presse-étoupe 23 dans lequel on fait coulisser le câble 29 soutenant l'ensemble formé par la barre de charge 15 et la deuxième prise 14 jusqu'à ce que cette dernière vienne se raccorder à la première prise 13 fixée sur la base 12 de l'élément tubulaire 11 qui supporte l'instrument 3, l'élément- support tubulaire 11 assurant un guidage de l'ensemble 14-15 pour faciliter ce raccordement (voir figure 6).The upper tube 2a is connected at its upper part to a pipe 22 for supplying pressurized hydraulic fluid and is provided at its top with a safety shutter or cable gland 23 in which the cable 29 supporting the assembly formed by the load bar 15 and the second socket 14 until the latter comes to be connected to the first socket 13 fixed on the base 12 of the tubular element 11 which supports the instrument 3, the element- tubular support 11 ensuring guidance of the assembly 14-15 to facilitate this connection (see FIG. 6).

Des organes d'enclenchement ou de liaison électro-hydraulique ou mécanique 24 et 25 sont respectivement adaptés à la deuxième prise 14 et à la paroi interne du tube 11, ces organes étant adaptés à être dégagés l'un de l'autre par une traction suffisante exercée sur le câble 29 depuis la surface.Electro-hydraulic or mechanical interlocking or connecting members 24 and 25 are respectively adapted to the second socket 14 and to the internal wall of the tube 11, these members being adapted to be released from one another by traction sufficient exerted on the cable 29 from the surface.

Dans l'exemple de réalisation considéré qui est du type mécanique, les organes 24 et 25 sont constitués respectivement d'une rondelle cisail- lable portée par la deuxième prise 14 ou la barre de charge 15 et de bras ou couteaux de retenue de cette rondelle, portés par l'élément-support tubulaire 11 (voirfigure2A).In the embodiment considered which is of the mechanical type, the members 24 and 25 respectively consist of a shear washer carried by the second socket 14 or the load bar 15 and arms or knives for retaining this washer , carried by the tubular support element 11 (see FIG. 2A).

Le câble 29 est déroulé depuis la surface à partir d'un treuil 26. Entre le treuil 26 et l'obturateur 23, le câble 29 passe sur les poulies de renvoi 27 et 28 (figure 6).The cable 29 is unwound from the surface from a winch 26. Between the winch 26 and the shutter 23, the cable 29 passes over the return pulleys 27 and 28 (Figure 6).

Lorsque l'opération de connexion électrique de la deuxième prise 14 à la prise mâle 13 ainsi que la liaison mécanique entre la barre 15 et la base 12 sont réalisées, une légère traction F exercée sur le câble 29 (figure 11) permet de désolidariser de l'ergot 16a la base 12 de l'élément tubulaire 11 qui peut alors passer en une position intermédiaire telle celle illustrée par le figure 2, l'instrument 3 étant sortie de son carter protecteur 32 éventuel et se trouvant alors dans la partie inférieure non tubée, ou découverte, du puits 21 (figure 7).When the operation of electrical connection of the second socket 14 to the male socket 13 as well as the mechanical connection between the bar 15 and the base 12 are carried out, a slight traction F exerted on the cable 29 (FIG. 11) makes it possible to separate from the lug 16 has the base 12 of the tubular element 11 which can then pass into an intermediate position such as that illustrated in FIG. 2, the instrument 3 being removed from its protective casing 32 and possibly then being in the lower part not cased, or uncovered, from well 21 (Figure 7).

Pour déplacer l'extension 1, il est possible de pomper le fluide sous pression de manière à ce qu'il exerce une force tendant à déplacer le piston 18.To move the extension 1, it is possible to pump the fluid under pressure so that it exerts a force tending to move the piston 18.

Ce mode de réalisation est particulièrement approprié au cas de puits fortement déviés.This embodiment is particularly suitable for highly deviated wells.

Les interventions et/ou mesures sont alors effectuées en déplaçant la sonde dans le découvert du puits (voir figure 7). Ces mesures peuvent être effectuées soit en pompant le fluide hydraulique qui pousse l'extension 1 pour la faire pénétrer plus profondément dans le puits, soit en tirant sur le câble 29.Interventions and / or measurements are then carried out by moving the probe into the overflow of the well (see Figure 7). These measurements can be carried out either by pumping the hydraulic fluid which pushes the extension 1 to make it penetrate deeper into the well, or by pulling on the cable 29.

Les mesures peuvent se faire alors que l'organe d'intervention se rapproche du tube inférieur (voir figure 7). Bien entendu, dans ce dernier cas, la sonde aura été sortie de la longueur souhaitée avant que les mesures soient entreprises.Measurements can be made while the intervention unit approaches the lower tube (see Figure 7). Of course, in the latter case, the probe will have been removed from the desired length before the measurements are taken.

Si après avoir travaillé dans une première zone du puits on souhaite travailler dans une deuxième zone située à une distance de la première zone telle que la longueur de l'extension ne permette pas d'atteindre ces deux zones en une seule et même course, il est alors avantageux de replacer l'extension dans le tube inférieur, de remonter à la surface le câble 29, la prise 14 et la barre de charge 15 et de modifier la longueur du tube supérieur, soit en enlevant des éléments du train de tiges, soit en en ajoutant, suivant la position relative des deux zones.If after working in a first zone of the well you wish to work in a second zone located at a distance from the first zone such that the length of the extension does not allow these two zones to be reached in one and the same stroke, it it is then advantageous to replace the extension in the lower tube, to bring the cable 29, the socket 14 and the load bar 15 to the surface and to modify the length of the upper tube, either by removing elements from the drill string, either by adding, depending on the relative position of the two zones.

Dans le cas de la figure 8, la longueur du tube supérieur 2a a été augmentée.In the case of FIG. 8, the length of the upper tube 2a has been increased.

Ensuite, une fois la zone de travail atteinte on introduit le câble 29 équipé de la barre de charge 15 et de la prise 14 que l'on connecte à la prise 13, on ressort l'extension et on effectue les opérations à entreprendre.Then, once the working area has been reached, the cable 29 fitted with the load bar 15 and the socket 14 which is connected to the socket 13 is introduced, the extension is pulled out and the operations to be undertaken are carried out.

Une ouverture 30 peut être prévue au voisinage de l'extrémité inférieure du tube inférieur 2b. Cette ouverture 30 permettra la circulation d'un fluide après que le piston 18 est passé à son niveau.An opening 30 may be provided in the vicinity from the lower end of the lower tube 2b. This opening 30 will allow the circulation of a fluid after the piston 18 has passed to its level.

On ne sortirait pas du cadre de la présente invention en prévoyant des voies de circulation d'un fluide telles les boues de forage à travers le dispositif.It would not be departing from the scope of the present invention to provide fluid circulation paths such as drilling mud through the device.

Ainsi, lorsque le dispositif est équipé d'un étranglement 31, l'extension 1 peut être munie d'un premier orifice 33 mis en communication avec un deuxième orifice 34, ces deux orifices étant disposés de telle sorte que la circulation du fluide s'établisse sensiblement une fois que l'extension est en butée, la sonde étant sortie.Thus, when the device is equipped with a throttle 31, the extension 1 can be provided with a first orifice 33 placed in communication with a second orifice 34, these two orifices being arranged so that the circulation of the fluid s' establish substantially once the extension is in abutment, the probe being extended.

Le premier orifice 33 peut être également mis en communication avec un troisième orifice 35 situé au voisinage de l'instrument d'intervention 3, de manière à permettre une circulation du fluide dans la partie basse du puits.The first orifice 33 can also be placed in communication with a third orifice 35 located in the vicinity of the intervention instrument 3, so as to allow circulation of the fluid in the lower part of the well.

Ces aménagements du dispositif selon l'invention peuvent être également réalisés si l'on utilise un piston 18. L'orifice 33 sera situé au-dessus du piston, l'orifice 34 au-dessous et l'orifice 35 au voisinage de la sonde.These arrangements of the device according to the invention can also be achieved if a piston 18 is used. The orifice 33 will be located above the piston, the orifice 34 below and the orifice 35 in the vicinity of the probe. .

Bien entendu, les différents orifices 30, 33, 34 et 35 seront dimensionnés de manière à maintenir des pressions différentielles suffisantes pour permettre le déplacement de l'extension 1 par pompage.Of course, the various orifices 30, 33, 34 and 35 will be dimensioned so as to maintain sufficient differential pressures to allow the displacement of the extension 1 by pumping.

La figure 13 représente un autre mode de réalisation suivant lequel la connexion électrique est effectuée par un premier câble 29 muni d'une prise 14 qui pénètre dans l'extension 1 pour se connecter à la prise 13 qui est logée dans l'extension 1.FIG. 13 represents another embodiment according to which the electrical connection is carried out by a first cable 29 provided with a socket 14 which enters the extension 1 to connect to the socket 13 which is housed in the extension 1.

Dans l'exemple de la figure 13, la prise 13 est située directement sur l'instrument 3.In the example of FIG. 13, the socket 13 is located directly on the instrument 3.

La prise 14 est pompée depuis la surface jusqu'à la prise 13 et de ce fait doit être pompée à travers des sections de passage différentes.The outlet 14 is pumped from the surface to the outlet 13 and therefore must be pumped through different passage sections.

Afin de faciliter le pompage de la prise 14 jusqu'à l'extrémité supérieure de l'extension, on peut utiliser un piston baladeur 36 placé autour du câble 29, ce piston 36 prenant appui sur la prise 14 lors du pompage de cet ensemble dans le tube 2 et étant retenu par des butées, situées par exemple à l'extrémité supérieure de l'extension lorsque la prise 14 pénétre dans l'extension 1.In order to facilitate the pumping of the socket 14 to the upper end of the extension, it is possible to use a sliding piston 36 placed around the cable 29, this piston 36 bearing on the socket 14 during the pumping of this assembly in the tube 2 and being retained by stops, located for example at the upper end of the extension when the socket 14 enters the extension 1.

Des moyens, tels un dégagement 37 pratiqué au voisinage de l'extrémité inférieure du tube inférieur 2b, pourront permettre une meilleur circulation du fluide de pompage une fois que cesse l'action du piston baladeur.Means, such as a clearance 37 made in the vicinity of the lower end of the lower tube 2b, may allow better circulation of the pumping fluid once the action of the wandering piston ceases.

Un tel dispositif pourra comporter des moyens d'ancrage et de désancrage de la prise 14 sur l'extension. Ces moyens pourront être situés au voisinage de l'instrument 3 et être de préférence du type électro-hydraulique télécommandé depuis la surface.Such a device may include means for anchoring and de-anchoring the socket 14 on the extension. These means may be located in the vicinity of the instrument 3 and preferably be of the electro-hydraulic type remotely controlled from the surface.

Enfin l'extension 1 pourra être composée de plusieurs éléments tubulaires comportant chacun des connecteurs électriques, ces éléments assurant la liaison électrique et mécanique entre la sonde 3 et la prise du connecteur 9.Finally, the extension 1 may be composed of several tubular elements each comprising electrical connectors, these elements ensuring the electrical and mechanical connection between the probe 3 and the socket of the connector 9.

Claims (18)

1. Method for effecting measurements and/or interventions in a well (21) using at least one pipe (2) having at least two parts, one the so-called upper part (2a), the other the so-called lower part (2b), and an extension (1) having two ends, one the so-called upper end and the other the lower end and an instrument for measuring and/or intervention (3) fixed to the lower end of the extension (1), each of these two parts of the pipe (2) as well as the extension (1) being able to comprise a plurality of elements, characterized in that it successively comprises the following steps:
a) mounting said extension (1) equipped with the instrument (3) on the lower part of the pipe (2b),
b) mounting of the upper part of the pipe (2a) above the lower part of the pipe (2b), this step being accompanied by a greater penetration into the well (21) of the arrangement constituted by the lower pipe of the extension (1) and the instrument (3) and
c) moving the extension (1) and the instrument (3) relative to the pipe (2) up to a position of said instrument permitting the measurements and/or interventions.
2. Method according to claim 1 applied to the case in which said instrument (3) is electrically connected to the surface, this instrument being electrically connected to a first plug (13) or a first electric connector (9) which comprises a second plug (14), plugging of these two plugs (13 and 14) being possible in liquid media, said first plug (13) being fixed with regard to the extension (1), characterized in that it comprises following step c) an additional step comprising introducing of the second plug (14) into the pipe (2) up to the first plug and its connection with the first plug (13), said second plug (14) mechanically and electrically being fixed to the lower end of a first electric transmission cable (29), the cable (29) at its upper end being connected to the surface installations, the second plug (14) being fixedly attached with the extension (1) at the end of this additional step.
3. Method according to claim 2, characterized in that said first plug (13) is directly fixed by the probe.
4. Method according to claim 2, applied to the case where said instrument (3) is electrically connected to the first plug (13) of the first connector (9) by an intermediate connection thanks to a third plug (4) of a second electric connector (5) comprising a fourth plug (6), these two plugs (4 and 6) being pluggable in liquid media and/or by multi contact, said third plug (4) being fixedly attached to the extension (1) in the neighbourhood of its lower end, characterized in that it comprises between step a) and step b) an intermediate additional step comprising introducing of the fourth plug (6) into the extension (1) and its connection with the third plug (4), said third plug (4) mechanically and electrically being fixed to the lower end of a second electric transmission cable (10), said cable (10) being connected at its upper end to said first plug (13) of the first connector (9), this fourth plug possibly being fixedly attached to the extension (1) in the neighbourhood of its lower end at the end of said intermediate step.
5. Process according to one of the preceding claims 2 to 4 characterized in that at least one of these second (14) and fourth plugs (5) is displaced or moved by pumping, particularly when the method is applied to wells having deviations.
6. Method according to one of the preceding claims, characterized in that at least certain of the movements of the extension (1), particularly at the exit of the pipe (2), are caused by pumping of a liquid.
7. Method according to one of the preceding claims, characterized in that at the end of a displacement or moving of the extension (1) corresponding to the intervention of the instruments (3) on a first zone of the well (21), this instrument is reentered into the pipe (2) into the initial position which it occupied before step c) and that the length of the upper pipe (2a) is modified for allowing displacement or moving of said instrument (3) up to the neighbourhood of the new intervention zone.
8. Method according to claim 7, characterized in that the second plug (14) as well as the first cable (29) are withdrawn from the upper pipe (2a) before the length of the latter is modified.
9. Method according to one of the claims 2 to 7, characterized in that the first cable (29) penetrates into the upper pipe by a connection with lateral window.
10. Method according to claim 1, characterized in that the extension (1) remains suspended on the lower pipe (2b) during the penetration into the well (21)..
11. Method according to claim 1, characterized in that the extension (1) remains suspended to the lower end of the lower pipe (2b) when assembling the latter.
12. Device for effecting measurements and/or interventions in a well (21), comprising at least one pipe (2) and one extension (1) possibly tubular, having two ends, a so-called lower end and a so-called upper end, said pipe (2) comprising at least two parts, a so-called upper part and a so-called lower part (2b), each of the two parts as well as the extension (1) being able to comprise a plurality of elements, said instrument (3) being fixedly attached to the lower end of the extension (1), characterized in that the device comprises anchoring means (16, 16a) of said extension (1) on said lower part (2b) of the pipe (2), said means (16, 16a) being releasable from the surface, and means (18,31) permitting the displacement of the extension (1) relative to the pipe (2).
13. Device according to claim 12, applied to the case in which said instrument (3) is electrically connected to a first plug (13) of a first electrical connector (9) comprising a second plug (14), said first plug (13) being fixedly attached to the extension (1) in the neighbourhood of its upper end, characterized in that it comprises a first electric transmission cable (29), the lower end of which is mechanically fixed and electrically connected to said second plug (14) and the upper end of which is connected to surface installations, and in that said second plug (14) in its neighbourhood comprises hooking means (24) cooperating with complementary means (25) disposed in the neighbourhood of the upper end of the extension (1).
14. Device according to claim 13, applied to the case in which said instrument (3) is electrically connected to a third plug (4) of a second electric connector (5) comprising a fourth electric plug (6), said third plug (4) being fixedly attached to the extension (1) in the neighbourhood of its lower end, characterized in that it comprises a second electric transmission cable (10), the lower end of which is mechanically fixed and electrically connected to said fourth plug (6) and the upper end of which is connected to said first plug (13).
15. Device according to one of claims 13 and 14, characterized in that at least one of these second and fourth plugs (14 or 6) comprises means permitting its displacement by pumping.
16. Device according to one of the claims 13 to 15, characterized in that at least one of these second and fourth plugs (14 or 6) comprises an unlockable or releasable hooking element (24,15).
17. Device according to one of the claims 13 to 16, characterized in that the upper pipe comprises a connector with lateral window permitting passage of the first cable (29).
18. Device according to one of claims 13 to 17, characterized in that it comprises a sliding piston (36).
EP84401247A 1983-06-22 1984-06-18 Borehole logging and work-over method and apparatus Expired EP0132423B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310432A FR2547861B1 (en) 1983-06-22 1983-06-22 METHOD AND DEVICE FOR MEASURING AND INTERVENTING IN A WELL
FR8310432 1983-06-22

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EP0132423A1 EP0132423A1 (en) 1985-01-30
EP0132423B1 true EP0132423B1 (en) 1988-01-07

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EP (1) EP0132423B1 (en)
JP (1) JPH066864B2 (en)
CA (1) CA1274766A (en)
DE (1) DE3468477D1 (en)
FR (1) FR2547861B1 (en)
NO (1) NO842481L (en)

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Also Published As

Publication number Publication date
JPS6073996A (en) 1985-04-26
CA1274766A (en) 1990-10-02
FR2547861B1 (en) 1987-03-20
EP0132423A1 (en) 1985-01-30
DE3468477D1 (en) 1988-02-11
US4664189A (en) 1987-05-12
NO842481L (en) 1984-12-27
JPH066864B2 (en) 1994-01-26
FR2547861A1 (en) 1984-12-28

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