EP0417009B1 - Vorrichtung und Anlage zur Reinigung von Abzugskanälen, insbesondere bei Erdölbohrlöchern - Google Patents

Vorrichtung und Anlage zur Reinigung von Abzugskanälen, insbesondere bei Erdölbohrlöchern Download PDF

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Publication number
EP0417009B1
EP0417009B1 EP90402457A EP90402457A EP0417009B1 EP 0417009 B1 EP0417009 B1 EP 0417009B1 EP 90402457 A EP90402457 A EP 90402457A EP 90402457 A EP90402457 A EP 90402457A EP 0417009 B1 EP0417009 B1 EP 0417009B1
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EP
European Patent Office
Prior art keywords
fluid
accordance
pipe
downstream
deflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90402457A
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English (en)
French (fr)
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EP0417009A1 (de
Inventor
Henri Cholet
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/267—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being deflected in determined directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/035—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B08B9/0433—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided exclusively with fluid jets as cleaning tools
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells

Definitions

  • the present invention relates to apparatus and installations for cleaning horizontal drains in oil production wells.
  • Patent US-A-4,744,420 discloses a device for cleaning such horizontal drains, which comprises at the end of two concentric casings a body provided with nozzles or nozzles for projecting a cleaning fluid, this body delimiting a path supply of cleaning fluid, connected to said nozzles, as well as a return path of this fluid charged with solid particles of sand or other sediments, these two paths being respectively connected to one of the two conduits delimited by the two casings concentric.
  • the projection nozzles for cleaning fluid are arranged at the end of the body and oriented substantially parallel to the axis of the drain. Such an arrangement tends to drive the sand and other sediments accumulated in the drain in front of the device.
  • the invention proposes to solve, so as to achieve more effective cleaning of such horizontal or substantially horizontal drains.
  • the subject of the invention is an apparatus for cleaning a horizontal or gently sloping drain, adapted to be disposed at the downstream end of two concentric casings, delimiting two also concentric conduits, this apparatus comprising a body which is provided at its end with at least one fluid spray nozzle and which delimits on the one hand a cleaning fluid supply path and on the other hand a return path for the fluid loaded with solid sand particles or other sediments, these two paths being intended to be connected respectively to the two conduits delimited by the casings, characterized in that it comprises deflector means cooperating with said nozzle to direct the jet of the fluid leaving the or each nozzle in the direction of the wall of the drain where the solid particles accumulate and in that said deflectors are adapted to optimize the shape of said jet.
  • the invention also relates to an installation comprising such an apparatus and further characterized in that it comprises a connection box divided into two chambers connected at their upstream part to two casings arranged side by side and at their downstream part to the two concentric casings.
  • FIG. 1 a horizontal or substantially horizontal drain section 10 connected to a main casing 1 (Fig. 6).
  • two concentric casings 14, 16 are arranged delimiting between them an annular duct 17, while the inner casing delimits an axial duct 19.
  • the downstream end of the inner casing 14 is set back with respect to the downstream end of the outer casing and it is between these two ends that arranged the apparatus according to the invention.
  • This device comprises a body 20 produced in several parts, in this case three, produced and arranged so as to fulfill several functions which will be described in more detail below. These three parts are: an external part 22, a front central part 24 and a rear central part 26.
  • the outer part 22 is received in a sheath 28 whose inner surface 29 preferably has a frustoconical shape, this sheath being fixed in any suitable known manner to the end of the casing 16, for example by means of a collar 30.
  • This outer part 22 is hollow and has at its end directed downstream of the device a head 32 projecting from the sheath and which is pierced with an axial duct 34 and three conduits 35, separated from the conduit 34 and which open into the side wall of the head 32.
  • the conduits 35 are arranged at 120 ° relative to one another. Depending on the size of the device, a greater number of such conduits can be provided, for example 6.
  • the conduit 34 opens into a housing 36 in which is fixed a nozzle 38 for spraying fluid.
  • the deflector 44 is mounted on a ball joint 46 and has an unbalance sufficient to occupy a determined position relative to the adjacent drain, the concave wall 45 of this deflector being directed towards the bottom wall of this drain.
  • this concave part 45 to 45 b can take various forms, depending on whether one wishes to obtain a wide jet (Fig. 2) or a narrower jet (Fig. 3).
  • the part 22 of the body comprises a housing 48 in which is received the central part 24 of the body which delimits on the one hand an axial through conduit 50 arranged in the extension of the conduit 34, at least one radial passage 52 making this central conduit communicate with an annular conduit 54 delimited between the central parts of the body and the external part, and at least one longitudinal duct 56, which is part of the return path of the fluid loaded with solid particles.
  • three conduits 56 are provided, arranged in the extension of the three conduits 35.
  • the outer part of the body has a tubular shape with a frustoconical intermediate portion 22 a and two cylindrical end portions 22 b , 22 c , the end portion 22 b of smaller diameter being connected to the inner casing 14 by a fitting 60.
  • the rear central part 26 of the body is fixed on the one hand to the internal downstream end of the connector 60 and on the other hand to the external wall of the front central body 24.
  • the part 26 forms a venturi and delimits a converging cone 68, a neck 70 then a divergent cone 72 to constitute, with an injector 74 fixed in the central body, a suction device the function of which will be specified below.
  • the outer casing is held in the drain 10 by an elastic centering device 76 of known construction.
  • a cup 78 is interposed between the outer casing 16 and the connector 60 in order to avoid the deposit of sand or other solid particles at the end of the annular gap 80 delimited between the body and the outer casing.
  • the inner casing 14 is supplied with fluid, in this case water, from the surface.
  • fluid in this case water
  • This fluid, arriving in the connector 60 passes from the axial duct 19 to the annular duct 64 delimited between the central and external parts of the body, to reach the radial passage 58.
  • the working fluid is divided into two directed flows, one towards the nozzle 38 and the other towards the injector 74.
  • the respective sections of the nozzle and the injector are chosen so as to obtain a determined distribution of the flow rate, which can for example be 3 / 5th of the incident flow in the direction of the injector and 2 / 5th in the direction of the nozzle 38.
  • the jet of fluid emitted by the nozzle 38 is deflected by the deflector 44 towards the lower wall of the drain and causes effective agitation of the solid particles of sand or other sediments accumulated in the drain.
  • the fluid charged with these particles is sucked at the level of the duct 35, this suction effect being caused in the venturi 68-72 by the second flow of working liquid, emitted by the injector 74.
  • the working fluid and the working liquid particles mix in the part 70, 72 of the body and are directed towards the surface by crossing the fitting 60 by the conduits 66 and by traversing the annular conduit 17 delimited between the two casings.
  • the concave shape of the deflector makes it possible to give the jet an optimal shape, according to the size and the consistency of the sandy deposits.
  • this deposit is often made coherent by deposits of hydrocarbons, which makes the energy concentration effect obtained by the apparatus according to the invention all the more important.
  • FIG. 4 and 5 There is shown in Figures 4 and 5 a mounting variant of the deflector, according to which the ball joint of Figure 1 is replaced by a mounting around an axis 82 on which the deflector is mounted oscillating.
  • the unbalance of the deflector can be obtained by various means such as the asymmetrical shape of the deflector, the asymmetrical reduction of the latter or the use of materials with different densities.
  • the device can be the subject of many other variants, both in the production of the parts that compose it and in the number and arrangement of the various supply and return conduits for the cleaning fluid.
  • FIG. 6 represents a main casing 12 which extends from the surface and which comprises a substantially vertical part, then a curved part, to be extended by the substantially horizontal drain 10.
  • the external casing 16 provided with its centering device 76 and carrying the sleeve 28 at its end is introduced into this main casing.
  • the casings 14 and 16 can be formed either by rigid tubes screwed to each other, or by continuous elements unwound from the surface.
  • the installation can of course be completed by connecting the inner casing to a pump supplying water under an appropriate pressure, and by connecting the outer casing to known means for extracting the liquid laden with particles.
  • connection box 100 is used for this purpose, making it possible to switch from a concentric arrangement of the casings 14, 16 downstream of this box, to a side-by-side arrangement, upstream of said box.
  • connection box 100 is divided into two chambers 102, 104 of which the first 102 can be connected at its upper part to a casing 106 whose section corresponds to the section of the annular gap between the two concentric casings 14 and 16 while it opens at its lower end into a section of tube 108 which can be connected by a connector 110 to the upper part of the outer casing 16.
  • Figure 9 is a block diagram, the shapes are actually adapted to assume a good flow.
  • the second chamber 104 is connected at its upper part to a casing 112 of the same section as the inner casing 14, while at its lower part it opens into a section of tube 114 which can be connected to the inner casing 14, either by a simple connection if the two inner and outer casings are substantially at the same level, preferably by a sleeve 116 and a fitting 118, as is generally the case, the two concentric casings do not have the same length.
  • connection box 100 is lowered into the main casing, the additional casing elements 106 and 112 being added to the upper part of this box, when the device must be advanced down the drain.
  • the casing 112 is connected to a pump 114 and the casing 106 to a settling tank 116.
  • Such an arrangement is particularly advantageous because it facilitates the addition of additional tubing, the side-by-side arrangement being in this respect much more favorable than the concentric arrangement.
  • the device according to the invention also has great flexibility of use and adaptation. Indeed, if it is desired to perform a peripheral cleaning operation of the main casing or of the drain, the orientable or articulated deflector can be replaced by a fixed deflector disposed substantially perpendicular to the axial jet, and which projects the fluid onto a 360 ° angle.
  • the conduits 35 may in particular have an axial direction.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cleaning In General (AREA)
  • Removal Of Floating Material (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (15)

  1. Vorrichtung zur Reinigung eines horizontalen oder gering geneigten Drainrohres, die angepaßt ist, um an dem abströmseitigen Ende von zwei konzentrischen Rohrsträngen (14, 16) angeordnet zu sein, die zwei ebenfalls konzentrische Leitungen (17, 19) begrenzen, wobei diese Vorrichtung einen Körper (20) umfaßt, der an seinem Ende mit wenigstens einer Düse (38) zur Projektion von Fluid ausgestattet ist und der einerseits einen Zuführungsweg für Reinigungsfluid und andererseits einen Rückführungsweg für das mit Fluid, welches mit festen Partikeln aus Sand oder anderen Sedimenten beladen ist, begrenzt, wobei diese beiden Wege bestimmt sind, jeweils mit zwei durch die Rohrstränge begrenzte Leitungen (17, 19) verbunden zu werden, dadurch gekennzeichnet, daß sie Ablenkmittel (44) umfaßt, die mit der Düse (38) zusammenwirken, um einen Fluidstrahl, der die oder jede Düse verläßt, in Richtung der Wand des Drainrohres, an welcher sich die festen Partikel ansammeln, zu leiten, und daß diese Ablenkbleche angepaßt sind, die Form des Strahles zu optimieren.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Ablenkblech (44) derart angeordnet ist, um den Fluidstrahl gegen das Unterteil auszurichten.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß das Ablenkblech (44) an einem Träger (42) beweglich angeordnet ist, der selbst an dem abströmseitigen Teil des Körpers (20) befestigt ist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Ablenkblech (44) an dem Träger (42) über ein kugeliges Gelenklager (46) angebracht ist.
  5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Ablenkblech (44) an dem Träger (42) beweglich ist, indem es um eine Achse (82) hin- und herbeweglich angebracht ist.
  6. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß das Ablenkblech (44) eine Unwucht darbringt und darauf abzielt, eine in Bezug auf seinen Träger bestimmte Position einzunehmen.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Zuführungsweg für das Fluid von der Anstömseite zur Abströmseite in dem Körper (20) eine ringförmige Leitung (54), wenigsten einen radialen Durchgang (52) und eine axiale Leitung (50, 34) umfaßt und der Rückführungsweg des mit Partikeln beladenen Fluids von der Abströmseite zur Anströmseite wenigstens eine Leitung (35), die sich von der seitlichen Wand des vorderen Teiles des Körpers (20) erstreckt, wenigstens eine longitudinale Leitung (56), eine ringförmige Leitung (68), die einen Injektor (74) für Treibfluid umgibt, und eine axiale Leitung (70, 72) umfaßt.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die ringförmige Leitung (68) und die axiale Leitung (70, 72) eine Venturidüse bilden, die mit dem Injektor eine Ansaugeinrichtung darstellt.
  9. Vorrichtung nach einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß der Injektor (74) mit Treibfluid von dem radialen Durchgang (52) und der axialen Leitung (50) versorgt wird, wobei sich die Fluidmenge in der axialen Leitung (50) in zwei entgegengesetzte, jeweils zu der Düse (38) und dem Injektor (74) gerichtete Ströme aufteilt.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Durchgangsquerschnitt des Injektors (74) größer ist als derjenige der Düse (38).
  11. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Körper (20) an seinem hinteren oder anströmseitigen Teil mit einem Verbindungselement (60) verbunden ist, das zwei Dreisätze von Leitungen (62, 66) umfaßt, welche jeweils eine axiale anströmseitige Leitung (19) mit einer abströmseitigen Leitung (64) und eine ringförmige anströmseitige Leitung (19) mit einer axialen abströmseitigen Leitung (73) kommunizierend machen.
  12. Ausrüstung zur Reinigung horizontaler oder gering geneigter Drainrohre, insbesondere in einer Bohrung zur Erdölproduktion, umfassend: zwei konzentrische Rohrstränge (14, 16), die zwei ebenfalls konzentrische Leitungen (17, 19) begrenzen; eine Einrichtung zur Projektion eines Reinigungsfluids und zur Evakuierung dieses mit Partikeln beladenen Fluids; Zuführungsmittel für das Reinigungsfluid und Evakuierungsmittel für das beladene Fluid, die an der Oberfläche angeordnet und jeweils mit der einen der konzentrischen Leitungen (17, 19) verbunden sind, gekennzeichnet durch die Vorrichtung, die in einem der Ansprüche 1 bis 11 definiert ist.
  13. Ausrüstung nach Anspruch 12, dadurch gekennzeichnet, daß die Zuführungsmittel für das Reinigungsfluid mit der Leitung (19) verbunden sind, die durch den inneren Rohrstrang begrenzt ist.
  14. Ausrüstung nach einem der Ansprüche 12 und 13,, dadurch gekennzeichnet, daß sie einen Verbindungskasten (100) umfaßt, der in zwei Kammern (102, 104) unterteilt ist, welche an ihrem anströmseitigen Teil mit zwei nebeneinander angeordneten Rohrsträngen (106, 112) und an ihrem abströmseitigen Teil mit den zwei konzentrischen Rohrsträngen (14, 16) verbunden sind.
  15. Ausrüstung nach Anspruch 14, dadurch gekennzeichnet, daß der Verbindungskasten mit wenigstens dem einen der konzentrischen Rohrstränge (14, 16) über eine Zwischenhülse (116) verbunden ist.
EP90402457A 1989-09-07 1990-09-06 Vorrichtung und Anlage zur Reinigung von Abzugskanälen, insbesondere bei Erdölbohrlöchern Expired - Lifetime EP0417009B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911693 1989-09-07
FR8911693A FR2651451B1 (fr) 1989-09-07 1989-09-07 Appareil et installation pour le nettoyage de drains, notamment dans un puits de production petroliere.

Publications (2)

Publication Number Publication Date
EP0417009A1 EP0417009A1 (de) 1991-03-13
EP0417009B1 true EP0417009B1 (de) 1994-08-17

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EP90402457A Expired - Lifetime EP0417009B1 (de) 1989-09-07 1990-09-06 Vorrichtung und Anlage zur Reinigung von Abzugskanälen, insbesondere bei Erdölbohrlöchern

Country Status (6)

Country Link
US (1) US5086842A (de)
EP (1) EP0417009B1 (de)
CA (1) CA2024866C (de)
DK (1) DK0417009T3 (de)
FR (1) FR2651451B1 (de)
NO (1) NO300282B1 (de)

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US5086842A (en) 1992-02-11
CA2024866A1 (fr) 1991-03-08
EP0417009A1 (de) 1991-03-13
DK0417009T3 (da) 1994-09-12
NO903864L (no) 1991-03-08
NO903864D0 (no) 1990-09-05
FR2651451B1 (fr) 1991-10-31
FR2651451A1 (fr) 1991-03-08
CA2024866C (fr) 2000-09-19
NO300282B1 (no) 1997-05-05

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