WO2006111111A1 - Cable utilise a des fins de mesures et d'exploration geophysiques - Google Patents

Cable utilise a des fins de mesures et d'exploration geophysiques Download PDF

Info

Publication number
WO2006111111A1
WO2006111111A1 PCT/DE2005/000749 DE2005000749W WO2006111111A1 WO 2006111111 A1 WO2006111111 A1 WO 2006111111A1 DE 2005000749 W DE2005000749 W DE 2005000749W WO 2006111111 A1 WO2006111111 A1 WO 2006111111A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
measuring
wires
conductors
core
Prior art date
Application number
PCT/DE2005/000749
Other languages
German (de)
English (en)
Inventor
Werner Führer
Original Assignee
Warschau, Katrin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Warschau, Katrin filed Critical Warschau, Katrin
Priority to PCT/DE2005/000749 priority Critical patent/WO2006111111A1/fr
Publication of WO2006111111A1 publication Critical patent/WO2006111111A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/226—Helicoidally wound metal wires or tapes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H01B7/046—Flexible cables, conductors, or cords, e.g. trailing cables attached to objects sunk in bore holes, e.g. well drilling means, well pumps

Definitions

  • the invention relates to a cable for geophysical measurement and reconnaissance purposes with high axial stiffness, which is used in particular in the petroleum and natural gas production industry.
  • geophysical measurements are carried out by means of measuring cables and associated measuring heads or probes in vertical and partly also horizontally inclined boreholes.
  • Geophysical measurements are carried out both at the open borehole and after lowering a production pipe under production conditions, respectively at the closed borehole.
  • the probes are either lowered to the measuring cable or they are already placed before the introduction of the cable into the well at a distal end of the cable.
  • this presupposes that the measuring and exploration cables with associated measuring technology are designed for the pressures, temperatures and humidities inherent in the depths.
  • the round wires used for the reinforcement must be stretched to achieve a uniform fit or a uniform alignment over the circumference of the cable.
  • the object of the invention is now to develop a cable for measurement and reconnaissance purposes, which has a high axial rigidity and reliably prevents the passage of media through its outer shell and thus for larger depths and the measurement of long horizontal wells with low inclination can be used ,
  • the cable for geophysical measurement and reconnaissance purposes from a formed as a media-tight reinforcement outer shell and a trapped by this reinforcement core, which has a measuring and supply cable with a plurality of mutually insulated conductors constructed.
  • the media-tight reinforcement consists of at least one layer of Z-wires, which are helically struck around the core over a length of length with the lay length L.
  • the measuring and supply cable includes at least two current-carrying conductors and at least one measuring line insulated therefrom for a measuring head arranged at the distal end of the cable and optionally a mobile advancing device.
  • the high axial stiffness of the cable to be achieved, expressed by the buckling length ⁇ is hereby dimensioned as a function of the breaking strength ⁇ ⁇ of the Z-wires, the lay length L and the geometry of the Z-wires.
  • the measuring head comprises a plurality of probes, in particular probes for detecting physical parameters, such. As temperature, pressure or specific resistances of the rock formations, or the location of the inflow of the natural gas and oil to be exploited. Furthermore, the measuring head can serve to control the spatial position of the drill bit or the quality of the attachment of a conveyor pipe.
  • Z-wires as external single-layer reinforcement, a very high axial rigidity of the cable can be achieved.
  • adjacent Z-wires of the cable according to the invention form and optionally non-positively engage each other and thus ensure an axial force introduction and forwarding in the direction of the longitudinal extent of the cable.
  • the cross section of the vertical borehole is dimensioned only so large that the inserted or retracted cable can be easily lowered therein, at least in the opening region of the borehole, due to the effect of gravity.
  • the further retraction or the further propulsion of the cable in the borehole is ensured by the application of an axial thrust force on the outer end side of the cable by means of a cable thruster.
  • the cable alternately strikes against the oppositely spaced inner sides of the borehole, with inevitably a frictional force during further cable propulsion is generated between the outer jacket of the cable and the wall of the borehole.
  • This distance of the attachment points is defined as the buckling length ⁇ of the cable, with naturally introduced with a large lay length L cable produces a greater buckling length ⁇ and thus lower frictional forces, with the result that the applied axial force can be reduced to the cable.
  • the Z wires are made of shaped steel wire.
  • the number of Z-wires used is measured depending on the thickness of the core of the cable described later, in order to form a closed running surface of the reinforcement or lateral surface of the cable in the stranded state of the Z-wires.
  • the Z-wires As a material for the Z-wires steel with a high breaking strength ⁇ B is provided.
  • the Z-wires have a coating which counteracts corrosion and promotes the tightness of the outer jacket against the passage of media.
  • the coating can be applied to the entire lateral surface of each individual Z-wire or only on the tread of the Z-wires after stranding.
  • the Z-wires consist of an alloyed and treated steel, which is optionally surface-treated with a zinc layer.
  • Another advantage of the relatively soft zinc layer of the Z-wires is that when the cable is stranded by the force of the stranding machine, adjacent Z-wires in fact "fuse" with each other, thereby metallically sealing the contact points between the Z-wires.
  • the production of the cable according to the invention requires unspecified special stranding machines.
  • the stranding of the individual Z wires to an external reinforcement of the cable takes place in Dependence on cross section and structure of the core and a desired lay length L of the cable.
  • the Z wires used for the reinforcement are shaped and stranded with one another in such a way that, in cross-section, they enclose the measurement and supply cable designed as a core in a mechanically and media-tight manner.
  • the closed running surface of the armor or lateral surface of the cable can effectively prevent the penetration of fluids and dust into the core region of the cable during the insertion of the cable into the borehole and during operation. Dusts contain very small solid particles that destroy the measuring and power cables placed in the core by erosion.
  • the core of the cable which is completely enveloped by the reinforcement or outer sheath, may be designed differently in relation to the measuring conductor.
  • metallic conductors or preferably also optical fiber conductors are used.
  • optical fiber cables interference caused by magnetic fields and galvanic currents in the passing rock formations or earth strata can be eliminated, especially at large depths of 3000 m. As a result, the quality of the measurement results to be evaluated and the measurement speed can be considerably increased.
  • the measurement and supply cable enclosed by a special sheath which in its structure is made of plastic encapsulated glass fibers, contains, in addition to the actual measuring conductors, further conductors, at least a pair of current-carrying conductors for a measuring head arranged at the distal end of the cable and optionally another pair current carrying conductor in the event that a propulsion device of the cable (Kabelzug soothing) used within the borehole to be connected.
  • the special sheath is flexurally elastic but torsionally rigid, so that residual stresses from the stranding of the steel reinforcement are compensated and thus a rotation of the cable in the borehole is largely prevented.
  • the propulsion device which can be used for propulsion of the measuring and supply cable in horizontal boreholes, is not the subject of this invention and is therefore not described in detail.
  • the measuring and supply cable can have one or more metallic measuring leads for the measuring heads, two current-carrying metallic conductors for the advancing device and the measuring heads, and one optical fiber cable designed as an optical measuring lead.
  • Fig. 1 shows a cross section of an embodiment of the invention
  • Fig. 2 is a perspective view of the new measuring
  • the cable 1 illustrates a cross section of the cable 1 according to the invention using an optical measuring conductor 8, the cable 1 essentially consisting of a core 3 and an outer casing 2 which completely surrounds this core 3.
  • the core 3 consists of measuring and supply wires with eg 10 mutually insulated conductors 3.2 and the Special jacket 3.1 made of plastic embedded in glass fibers, which surrounds these conductors 3.2.
  • a plastic for example, a polyester resin is used.
  • a cable pulling device (not shown) placed in the borehole at the distal end of the cable 1 is supplied by means of two current-carrying metallic conductors 4. Another pair of metallic conductors 5 is provided to electrically supply an optical measuring technique, also not shown, at the distal end of the cable 1.
  • An optical information transmission takes place through a fiber optic cable 8 as a measuring conductor with 8 multimode fibers.
  • three signal wires 6 are provided as control lines for cable pulling device and measuring technology as well as three signal wires 7 for the wired measured value transmission.
  • an 18 mm cable is used, in which the core 3 measures 9 mm in diameter.
  • the Z-wires 2.1 are shaped and stranded together so that they enclose the core 3 mechanically and media-tight.
  • each adjacent Z wires 2.1 are positively connected to each other, wherein the right inner edge of a Z-wire 2.1 contacts the left inner edge of the adjacent Z-wire 2.1 almost over its entire length.
  • Each individual Z-wire 2.1 abuts with its foot on the outer surface of the core 3.
  • form the facing away from the core 3 of the cable 1 end faces, respectively, the running surface 2.2 of each Z-wire 2.1, a media-tight closed armor.
  • the Z-wires 2.1 shaped steel wire is provided with a standard leg dimension of eg 4.5 mm. Thickness is understood to mean the distance between the surface of the core 3 and the foot region of the Z-wire 2.1 and the running surface 2.2 of the Z-wire 2.1.
  • Thickness is understood to mean the distance between the surface of the core 3 and the foot region of the Z-wire 2.1 and the running surface 2.2 of the Z-wire 2.1.
  • the foot resting on the special sheath 3.1 of the Z-wires 2.1 can be made profiled or it has claw-like formations 2.3 in the longitudinal extent of the Z-wires 2.1 on. As a result, the torsional stability is further increased.
  • the total diameter of the cable 1 is thus 18 mm in the example chosen.
  • Every single Z-wire 2.1 made of steel is completely galvanized.
  • All Z wires 2.1 extend basically in the direction of the longitudinal axis of the core 3, but are stranded together and thereby hit the core 3 of the cable 1.
  • a complete transfer of the Z wires 2.1 around the core, ie a 360 ° spiral, by definition corresponds to a lay length L of the cable 1.
  • the lay length L of the reinforcement or the outer jacket 2 is proportional to the buckling length ⁇ of the cable 1, which is a measure for the axial rigidity of the cable 1.
  • the number and geometry of the Z wires used 2.1 and depending on the material properties of the Z wires 2.1 thus the desired axial stiffness of the cable 1 can be achieved.
  • the outer sheath 2 consisting of Z wires 2.1 encloses the core 3 of the cable with smooth and media-free running surface 2.2, this core 3 being constructed from the special sheath 3.1 and the sheaths 3.1 enclosed by this sheath 3.1, comprising the lines 4 to 8. LIST OF REFERENCE SIGNS

Landscapes

  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un câble utilisé à des fins de mesures et d'exploration géophysiques, de haute résistance axiale, s'utilisant notamment dans l'industrie pétrolière et dans cette du gaz naturel. L'invention se caractérise en ce que le câble qui comprend une enveloppe extérieure (2) se présentant sous forme de blindage et une âme (3) contenue dans ce blindage, qui comporte un câble de mesure et d'alimentation munis de plusieurs conducteurs (3,2) isolés les uns par rapport aux autres, présente la structure de base suivante: le blindage comprend au moins une couche de fils inhibiteurs (2,1) qui sont câblés autour du noyau (3) de manière hélicoïdale sur une section longitudinale, notamment la longueur de câblage L du câble (1), de manière à former une surface extérieure (2,2) lisse étanche aux milieux, la face de parcours des fils inhibiteurs. Des fils inhibiteurs adjacents se raccordent les uns aux autres ou sont en prise mutuelle par liaison de forme et éventuellement de force. Ledit câble de mesure et d'alimentation comprend au moins deux fils conducteurs de courant (4, 5) et au moins une ligne de mesure ou de commande (6, 7, 8) qui est isolée par rapport auxdits fils, pour au moins une tête de mesure montée à l'extrémité distale du câble (1) et éventuellement un dispositif de tirage de câble. Les fils (4 à 8) sont regroupés en un faisceau de fils (3,2) et ce faisceau de fils est entouré d'une enveloppe spéciale (3,1) à base de fibres de verre noyées dans de la matière plastique, pour augmenter la résistance du câble (1) à la torsion.
PCT/DE2005/000749 2005-04-19 2005-04-19 Cable utilise a des fins de mesures et d'exploration geophysiques WO2006111111A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DE2005/000749 WO2006111111A1 (fr) 2005-04-19 2005-04-19 Cable utilise a des fins de mesures et d'exploration geophysiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2005/000749 WO2006111111A1 (fr) 2005-04-19 2005-04-19 Cable utilise a des fins de mesures et d'exploration geophysiques

Publications (1)

Publication Number Publication Date
WO2006111111A1 true WO2006111111A1 (fr) 2006-10-26

Family

ID=35447644

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/000749 WO2006111111A1 (fr) 2005-04-19 2005-04-19 Cable utilise a des fins de mesures et d'exploration geophysiques

Country Status (1)

Country Link
WO (1) WO2006111111A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104851509A (zh) * 2015-05-13 2015-08-19 姜明利 锁股式密封型承荷探测电缆

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679812A (en) * 1970-11-13 1972-07-25 Schlumberger Technology Corp Electrical suspension cable for well tools
DE3810746A1 (de) * 1987-04-02 1988-10-20 Norddeutsche Seekabelwerke Ag Kabel, insbesondere seekabel
EP0471600A1 (fr) * 1990-08-14 1992-02-19 Schlumberger Limited Procédé pour fabriquer un câble pour la transmission de données

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3679812A (en) * 1970-11-13 1972-07-25 Schlumberger Technology Corp Electrical suspension cable for well tools
DE3810746A1 (de) * 1987-04-02 1988-10-20 Norddeutsche Seekabelwerke Ag Kabel, insbesondere seekabel
EP0471600A1 (fr) * 1990-08-14 1992-02-19 Schlumberger Limited Procédé pour fabriquer un câble pour la transmission de données

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104851509A (zh) * 2015-05-13 2015-08-19 姜明利 锁股式密封型承荷探测电缆

Similar Documents

Publication Publication Date Title
DE68902106T2 (de) Anordnung und verfahren fuer das ausfuehren von messungen und eingriffen in einem bohrloch.
DE69936022T2 (de) Kabel
DE3513859C2 (de) Unterwasser-Nachrichtenkabel mit mehreren optischen Fasern
DE69118275T2 (de) Verfahren zum Herstellen eines Datenübertragungskabel
DE3513858A1 (de) Unterwasser-nachrichtenuebertragungskabel mit optischen fasern
DE69434746T2 (de) Verbesserte, mit Fett geschmierte Kabelanordnung zur Echtzeit-Oberflächenabbildung
DE3340923A1 (de) Verfahren zur herstellung einer elektrodenanordnung an einem bohrgestaengeabschnitt fuer eine einrichtung zur messung des scheinwiderstandes in bohrloechern
DE102004003479B4 (de) Bohrgestänge für Tiefbohrungen
DE3340915A1 (de) Einrichtung zur messung des scheinwiderstandes in bohrloechern
DE102009057147A1 (de) Kabel hoher Steifigkeit
DE3340914A1 (de) Elektrodenanordnung fuer einrichtungen zur messung des scheinwiderstandes in bohrloechern
DE1758576A1 (de) Biegsame Fuehrungsleitung fuer das Bohren unter Wasser
DE102014014794A1 (de) Kabel hoher Steifigkeit und Verfahren zur Herstellung desselben
DE102004015219B4 (de) Kabel für geophysikalische Mess- und Erkundungszwecke
DE2511019C2 (de) Grundelement zum Aufbau optischer Kabel
DE2313749C2 (de) Schutzrohr, insbesondere für gasisolierte Hochspannungsrohrleitungen
DE10160060A1 (de) Kunststoffschlauch, insbesondere Pneumatikschlauch
WO2006111111A1 (fr) Cable utilise a des fins de mesures et d'exploration geophysiques
EP3959381B1 (fr) Fondation d'une structure offshore dotée d'un câble de transmission et d'un élément de protection
DE19508888C2 (de) Flexible elektrische Starkstromleitung
DE69823414T2 (de) Röhrensystem für elektrische Messungen
EP3006801A2 (fr) Tuyau flexible du type "coiled-tubing" et methode de production
EP2150674B1 (fr) Procédé et dispositif de contrôle du gainage d'une tubulure lors de l'insertion dans un trou de forage rempli de liquide
EP3007178A1 (fr) Cable tres rigide
EP2205813B1 (fr) Procédé et dispositif de contrôle de l'enveloppe d'une conduite tubulaire pendant sa pose dans un trou de forage rempli de liquide

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Country of ref document: RU

122 Ep: pct application non-entry in european phase

Ref document number: 05748396

Country of ref document: EP

Kind code of ref document: A1