EP0374016A2 - Induktiver Kopplungsverbinder zur Ausrüstung von Übertagebohrlochanlagen - Google Patents

Induktiver Kopplungsverbinder zur Ausrüstung von Übertagebohrlochanlagen Download PDF

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Publication number
EP0374016A2
EP0374016A2 EP89403393A EP89403393A EP0374016A2 EP 0374016 A2 EP0374016 A2 EP 0374016A2 EP 89403393 A EP89403393 A EP 89403393A EP 89403393 A EP89403393 A EP 89403393A EP 0374016 A2 EP0374016 A2 EP 0374016A2
Authority
EP
European Patent Office
Prior art keywords
coils
valve block
suspension device
coil
well head
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.)
Withdrawn
Application number
EP89403393A
Other languages
English (en)
French (fr)
Other versions
EP0374016A3 (de
Inventor
Ramon Hernandez-Marti
Jean-Pierre Muller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SLB NV
Schlumberger Ltd USA
Original Assignee
Schlumberger NV
Schlumberger Ltd USA
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 Schlumberger NV, Schlumberger Ltd USA filed Critical Schlumberger NV
Publication of EP0374016A2 publication Critical patent/EP0374016A2/de
Publication of EP0374016A3 publication Critical patent/EP0374016A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
    • E21B33/0385—Connectors used on well heads, e.g. for connecting blow-out preventer and riser electrical connectors
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/0407—Casing heads; Suspending casings or tubings in well heads with a suspended electrical cable
    • 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
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/143—Inductive couplings for signals

Definitions

  • the invention relates to the field of well surface installations which require an electrical connection between the outside and the inside of the well.
  • a connection is particularly essential for oil wells equipped with permanent sensors, such as temperature or pressure sensors, because it ensures their electrical supply and the telemetry of the signals collected.
  • the surface installations therefore essentially consist of two parts: the wellhead and the valve block (Christmas tree).
  • the electrical connections through the surface installations are made by a set of connectors made up of pins and sockets which fit together when the valve block is installed on the well head.
  • the sockets are mounted inside the valve block and are connected to the outside of the valve block by a sealed electrical bushing.
  • the pins are mounted on the suspension device of the production column and are connected to the annular space between the casing and the production column by means of a second sealed bushing.
  • the subject of the invention is an inductive coupling connector which does not have the drawbacks mentioned above and which is reliable, resistant to attack by the environment in which it is immersed and easy to maintain.
  • the electrical connector with inductive coupling is intended to allow the exchange of electrical signals between the outside and the inside of a well, the well head of which is covered by a block of valves.
  • a hydraulic connection being arranged between the valve block and a device for suspending a production column installed in the well head.
  • the connector comprises at least two electrical coils, the respective winding axes of which are aligned with the axis of the wellhead.
  • the coils are integrated into the hydraulic connection between the valve block and the suspension device, one coils being integral with the valve block while the other of said coils is integral with the suspension device of the production column.
  • the coils are arranged in a concentric manner when the valve block is installed on the well head, a first of said coils being adapted to be inserted inside the second of said coils.
  • said first coil is integral with the valve block and is wound around a hydraulic connection which is fixed in a sealed manner in a bore arranged in the main conduit of the valve block.
  • Said second coil is wound inside a sleeve which surmounts the suspension device of the production column and which is adapted to receive the part of the hydraulic connection around which said first coil is wound. It is connected to an electronic circuit housed in the suspension device of the production column.
  • both of said coils are identical and superimposed when the valve block is installed on the well head.
  • the surface installations essentially comprise a block of valves 10 which is fixed in sealed manner by means of the seal 18, to the well head 20 by means of a fixing assembly 13.
  • the well head 20 is adapted to receive a suspension device 21 intended to anchor the upper end of the casing 30.
  • the suspension device 21 of the casing 30 is adapted to receive a suspension device 22 intended to anchor the upper end of the production column 40.
  • the seal between the wellhead 20 and the suspension device 21 on the one hand, and between the suspension devices 21 and 22 on the other hand, is respectively ensured by the seals 23 and 24.
  • the valve block 10 is equipped with valves 11 (a single valve 11 shown) making it possible to control the flow rate of the well through the main conduit 14.
  • the lower part of the valve block 10 has a bore 12 arranged in the main conduit 14 and in which the upper end of a cylindrical connector 15 provided with O-rings 16 is sealingly fixed.
  • the lower end of the connector 15, also provided with O-rings 17, is adapted to be fitted in a sealed manner in a bore 25 arranged in the suspension device 22 of the production column 40.
  • the inductive coupling connector comprises at least two coils 1A and 5A, the winding axes of which coincide with the axis zz ′ of the well head 20, and which are integrated into the hydraulic connection formed between the block of valves 10 and the suspension device 22 of the production column 40, one of the coils being integral with the valve block 10 while the other of said coils is integral with the suspension device 22.
  • the inductive coupling connector comprises on the one hand two electrical coils 1A and 1B wound around a first sleeve 1 secured to the connector 15, and on the other hand, two electrical coils 5A and 5B wound inside a second sleeve 5, removably attached, to the upper part of the suspension device 22.
  • the sleeve 1 When the valve block 10 is installed on the well head 20, the sleeve 1 is housed in the sleeve 5 so that the coils 1A and 5A on the one hand, and the coils 1B and 5B on the other part respectively are placed concentrically facing each other, while allowing a clearance of at least 2 mm between them.
  • each of the coils is housed in a groove coated, at least partially, with a highly ferromagnetic material such as ferrite.
  • a waterproof material which resists pressure, temperature and corrosion, such as an elastomer or a silicone-based resin.
  • the outputs of the coils 1A and 1B are respectively connected to conventional sealed bushings 2A and 2B, which are themselves connected by conductors 3A and 3B to sealed housings 4A and 4B located outside the valve block 10, each of boxes 4A and 4B being adapted to receive an electronic circuit which will be described below with reference to FIG. 3.
  • the outputs of the coils 5A and 5B are connected to sealed boxes 6A and 6B housed in the suspension device 22 of the production column, each of the boxes being adapted to receive a second electronic circuit.
  • the boxes 6A and 6B are connected to watertight bushings 7A and 7B which lead to the conductors 8A and 8B located in the annular space between the casing 30 and the production column 40.
  • the conductors 8A and 8B are connected to the sensors (not shown) placed in the well.
  • the inductive coupling connector according to the arrangement described above has the particular advantage of eliminating, during the positioning of the valve block 10, the positioning of the valve block 10 relative to the well head 20. It presents therefore as an electrical connection with centered quick coupling and fully integrated into the hydraulic connection that forms the connection between the wellhead 20 and the valve block 10. In addition, the maintenance of such a connector is facilitated by the fact that the coils 5A and 5B secured to the well head, are fixed to removable elements of the well head.
  • FIG. 3 is a diagram of the electronic circuit associated with the connector with inductive coupling and intended to ensure the electrical connection between two sensors placed at the bottom of the well (not shown) and the surface control equipment (not shown); the two sensors can for example be used to measure pressure and temperature. In this case, the two sensors are supplied by the same cable and the selection of the signal returned to the surface is made by the polarity of the supply. In order to simplify the description, only the circuit associated with the coils 1A and 5A will be described.
  • a first circuit which can in particular be housed in the housing 4A as mentioned above, is supplied by a current source 50.
  • the supply current once rectified by the bridge 51, supplies a converter 52 responsible for transforming direct current into alternating current; the frequency of the latter is controlled by a polarity detector 53 also supplied by the current source 50.
  • the output of the converter 52 directly supplies the coil 1A.
  • a second circuit housed in the housing 6A comprises a converter 55 supplied by the coil 5A and responsible for transforming the alternating current into direct current.
  • a polarity selector 56 controlled by a frequency detector 57 selects the polarity of the direct current delivered on the cable 8A so as to select the signals coming from one or the other of the sensors placed in the well.
  • the voltage pulses generated by the sensors modulate the voltage amplitude at the terminals of the coil 5A through the converter 55 by synchronous impedance modulation.
  • the converter 52 functions as a synchronous detector; it modulates the supply voltage with the voltage pulses after filtering the supply frequency.
  • Such a circuit has the advantage that it requires only a single connector with inductive coupling for the telemetry of the two sensors; thus, a second circuit associated with the coils 1B and 5B could for example serve as a backup circuit in the event of failure of the first.
  • the connector with inductive coupling comprises two coils having a substantially identical diameter and which overlap when the valve block 10 is installed on the well head 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Power Engineering (AREA)
  • Remote Sensing (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Earth Drilling (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Magnetically Actuated Valves (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP19890403393 1988-12-13 1989-12-07 Induktiver Kopplungsverbinder zur Ausrüstung von Übertagebohrlochanlagen Withdrawn EP0374016A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8816353A FR2640415B1 (fr) 1988-12-13 1988-12-13 Connecteur a accouplement inductif destine a equiper les installations de surface d'un puits
FR8816353 1988-12-13

Publications (2)

Publication Number Publication Date
EP0374016A2 true EP0374016A2 (de) 1990-06-20
EP0374016A3 EP0374016A3 (de) 1991-05-29

Family

ID=9372858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890403393 Withdrawn EP0374016A3 (de) 1988-12-13 1989-12-07 Induktiver Kopplungsverbinder zur Ausrüstung von Übertagebohrlochanlagen

Country Status (4)

Country Link
US (1) US5052941A (de)
EP (1) EP0374016A3 (de)
FR (1) FR2640415B1 (de)
NO (1) NO177474C (de)

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EP0499547A1 (de) * 1991-02-14 1992-08-19 Elf Aquitaine Production Unterwasser-Bohrlochkopf
EP0678880A1 (de) * 1994-04-22 1995-10-25 Panex Corporation Induktiver Verbinder für Bohrlochwerkzeuge
WO1996032763A3 (en) * 1995-04-12 1996-11-14 Itt Ind Ltd Electrical connector
EP0750323A4 (de) * 1994-03-11 1997-06-04 Yaskawa Denki Seisakusho Kk Kontaktlose übertragungsanordnung und trägerstruktur zu deren anwendung
WO2000038202A1 (en) * 1998-12-22 2000-06-29 Raytheon Company Apparatus and method for transferring energy across a connectorless interface

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US3079549A (en) * 1957-07-05 1963-02-26 Philip W Martin Means and techniques for logging well bores
US3090031A (en) * 1959-09-29 1963-05-14 Texaco Inc Signal transmission system
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US4901069A (en) * 1987-07-16 1990-02-13 Schlumberger Technology Corporation Apparatus for electromagnetically coupling power and data signals between a first unit and a second unit and in particular between well bore apparatus and the surface
US4852648A (en) * 1987-12-04 1989-08-01 Ava International Corporation Well installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellhead

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0499547A1 (de) * 1991-02-14 1992-08-19 Elf Aquitaine Production Unterwasser-Bohrlochkopf
FR2672935A1 (fr) * 1991-02-14 1992-08-21 Elf Aquitaine Tete de puits sous-marine.
US5213162A (en) * 1991-02-14 1993-05-25 Societe Nationale Elf Aquitaine (Production) Submarine wellhead
EP0750323A4 (de) * 1994-03-11 1997-06-04 Yaskawa Denki Seisakusho Kk Kontaktlose übertragungsanordnung und trägerstruktur zu deren anwendung
US5747894A (en) * 1994-03-11 1998-05-05 Kabushiki Kaisha Yaskawa Denki Factory automation connector and work pallet
EP0678880A1 (de) * 1994-04-22 1995-10-25 Panex Corporation Induktiver Verbinder für Bohrlochwerkzeuge
WO1996032763A3 (en) * 1995-04-12 1996-11-14 Itt Ind Ltd Electrical connector
WO2000038202A1 (en) * 1998-12-22 2000-06-29 Raytheon Company Apparatus and method for transferring energy across a connectorless interface
US6268785B1 (en) 1998-12-22 2001-07-31 Raytheon Company Apparatus and method for transferring energy across a connectorless interface

Also Published As

Publication number Publication date
FR2640415A1 (fr) 1990-06-15
NO177474C (no) 1995-09-20
NO177474B (no) 1995-06-12
NO894994L (no) 1990-06-14
FR2640415B1 (fr) 1994-02-25
EP0374016A3 (de) 1991-05-29
NO894994D0 (no) 1989-12-12
US5052941A (en) 1991-10-01

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