WO2003100211A1 - Filtre extensible pour puits horizontal ou sous grand angle, et son procede d'installation - Google Patents

Filtre extensible pour puits horizontal ou sous grand angle, et son procede d'installation Download PDF

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Publication number
WO2003100211A1
WO2003100211A1 PCT/JP2003/005805 JP0305805W WO03100211A1 WO 2003100211 A1 WO2003100211 A1 WO 2003100211A1 JP 0305805 W JP0305805 W JP 0305805W WO 03100211 A1 WO03100211 A1 WO 03100211A1
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WO
WIPO (PCT)
Prior art keywords
screen
wire
spiral wedge
end portions
wedge
Prior art date
Application number
PCT/JP2003/005805
Other languages
English (en)
Inventor
Tadayoshi Nagaoka
Original Assignee
Tadayoshi Nagaoka
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 Tadayoshi Nagaoka filed Critical Tadayoshi Nagaoka
Priority to AU2003235909A priority Critical patent/AU2003235909A1/en
Publication of WO2003100211A1 publication Critical patent/WO2003100211A1/fr

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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/108—Expandable screens or perforated liners
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like

Definitions

  • This invention relates to a well screen for a horizontal or high-angle well and, more particularly, to a weE screen for a horizontal or high-angle oil well capable of preventing movement of sand grains accompanying crude oil flowing into the well.
  • FIG. 32 shows one of such horizontal or high-angle well 100 which is formed by digging the ground from a vertical portion 100a through a curved portion 100b to a horizontal or high- angle portion 100c which extends in the horizontal or inclined direction along the oil stratum. Since this type of horizontal or high-angle well has a screen section for collecting oil which, is several time as long as a conventional vertical well, the horizontal or high-angle well has the advantage that it has a superior production efficiency which is several times as large as that of the vertical well.
  • the crude oil stratum very often depends upon a sand stratum.
  • a cavity 150 is produced in the horizontal portion 100c between the top portion of a cylindrical screen 130 and a well bore 120 and there occurs inevitable erosion of the screen due to collision with sand grains accompanying the flow of the oil in the direction of the arrow B.
  • No effective means for preventing such invasion of sand grains into the screen after use of the screen over a long period of time has not been found yet. Further, sand grains move with the flow of the crude oil in the cavity 150 and, the well itself will collapse with lapse of time resulting in stop of the flow of crude oil.
  • an object of the present invention to provide a cylindrical screen for a horizontal or high-angle well capable of preventing erosion of the screen due to colhsion of sand against the screen and preventing also collapse of the well due to movement of sand notwithstanding use of the screen over a long period of time in a horizontal or high- angle well in which filling of gravel is difficult Disclosure of the Invention
  • an expandable screen for a horizontal or high- angle well comprising: a perforated base pipe formed with a multitude of liquid collection holes; a spiral wedge-wire screen comprising a plurality of support rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire wound about the support rods on the outer peripheral side of the support rods to form a sht of a predetermined width and being welded to the support rods, said spiral wedge-wire being cut in the axial direction of the screen at a point in the circumferential direction, and said spiral wedge-wire screen having an outer diameter which is almost equal to or slightly smaller than a diameter of a well-bore in which the screen is installed and an inner diameter which is larger than an outer diameter of the perforated base pipe by a predetermined value; said spiral wedge-wire screen being wrapped on the outer periphery of the perforated base pipe with end portions of the spiral wedge-wire screen in the
  • the spiral wedge-wire screen expands and covers the inner wall of the well. Accordingly, the movement of sand grains which tend to flow into the screen with crude oil can be interrupted by the spiral wedge-wire screen whereby colhsion of the sand grains against the screen wire can be prevented and collapse of the well can be prevented.
  • a wire-mesh is provided between the end portions in the circumferential direction of the spiral wedge-wire screen and end portions in the circumferential direction of the wire-mesh are welded to the end portions in the circumferential direction of the spiral wedge-wire screen.
  • the gap produced between the end portions thereof in the circumferential direction is covered by the wire-mesh whereby flow of sand grains from outside into the screen through this gap can be prevented.
  • the spiral wedge-wire screen consists of a plurality of screen portions disposed at a predetermined interval in the axial direction of the screen and a mesh filter is provided over the outer peripheral surface of the screen portions, a gap between the end portions in the circumferential direction of the respective screen portions and the interval between adjacent ones of the screen portions.
  • the spiral wedge-wire screen is divided to a plurality of screen portions disposed at a predetermined interval in the axial direction of the screen, the screen can easily advance in a curved portion of the well. Further, since the mesh filter expands to even a small gap between the well bore and the wedge-wire screen and thereby prevents movement of the sand grains more completely. Furthermore, since the gap between the screen portions is covered also by the mesh filter, flowing in of the sand grains through this gap can also be prevented.
  • an expandable screen for a horizontal or high- angle well comprising: a perforated base pipe formed with a multitude of liquid collection holes; an inner spiral wedge-wire screen comprising a plurality of support rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire wound about the support rods on the outer peripheral side of the support rods to form a slit of a predetermined width and being welded to the support rods; an outer spiral wedge-wire screen comprising a plurality of support rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire wound about the support rods on the outer peripheral side of the support rods to form a sht of a predetermined width and being welded to the support rods, said spiral wedge-wire being cut in the axial direction of the screen at a point in the circumferential direction, and said spiral wedge-wire screen
  • a mesh filter is provided on the outer periphery of the outer spiral wedge-wire screen and end portions in the circumferential direction of the mesh filter are welded to the end portions in the circumferential direction of the outer spiral wedge-wire screen.
  • the expandable screen further comprises a plurahty of skid rods made of metal rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen, said skid rods being welded to the outer periphery of the outer spiral wedge-wire screen.
  • the skid rods perform the function of a sleigh when the screen is inserted in the well bore to mitigate friction between the outer surface of the screen and the wall of the well and, as a result, the screen can be inserted into the well easily and smoothly and the operation time required for inserting the screen can be shortened.
  • the support rods have either a wedge-shape or a polygonal shape.
  • the support rods preferably have a length in the radial direction of the screen which is larger than a length in the radial direction of the screen of the outer spiral wedge-wire screen.
  • an expandable screen for a horizontal or high- angle well comprising: a perforated base pipe formed with a multitude of hquid collection holes; a plurahty of steel plates in the form of a belt rounded annularly and wrapped on the outer periphery of the base pipe at a predetermined interval in the axial direction of the screen with end portions of each of the steel plates being superposed one upon the other thereby urging the steel plate to expand, and the end portion on the outer peripheral side of the superposed end portions being connected to a portion of the steel plate other than the superposed end portions by means of connecting wires which pass through a hollow central portion of the perforated base pipe; and a mesh filter covering the outer periphery of a portion of the perforated base pipe between the rounded steel plates provided at both ends in the axial direction of the screen and the outer periphery of the respective steel plates, end portions in the circumferential direction of the screen of the mesh filter being welded to the end portions in the circum
  • the rounded steel plates are caused to expand and the mesh filter covers the inner wall of the well and thereby prevents movement of the sand grains.
  • a method for installing an expandable screen for a horizontal or high-angle well comprising:
  • the expandable screen may further comprise a wire-mesh provided between the end portions in the circumferential direction of the spiral wedge- ire screen and end portions in the circumferential direction of the wire-mesh are welded to the end portions in the circumferential direction of the spiral wedge-wire screen.
  • the expandable screen may be one wherein the spiral wedge-wire screen consists of a plurahty of screen portions disposed at a predetermined interval in the axial direction of the screen and a mesh screen is provided over the outer peripheral surface of the screen portions, a gap between the end portions in the circumferential direction of the respective screen portions and the interval between adjacent ones of the screen portions.
  • a method for installing an expandable screen for a horizontal or high-angle well comprising:
  • an expandable screen in a predetermined location in a well bore, said screen comprising: a perforated base pipe formed with a multitude of liquid collection holes; an inner spiral wedge-wire screen comprising a plurahty of support rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire wound about the support rods on the outer peripheral side of the support rods to form a sht of a predetermined width and being welded to the support rods; an outer spiral wedge-wire screen comprising a plurahty of support rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire wound about the support rods on the outer peripheral side of the support rods to form a sht of a predetermined width and being welded to the support rods, said spiral wedge-wire being cut in the axial direction of the screen at a point in the circumfer
  • the expandable screen may further comprise a mesh filter provided on the outer periphery of the outer spiral wedge-wire screen and end portions in the circumferential direction of the mesh filter are welded to the end portions in the circumferential direction of the outer spiral wedge-wire screen.
  • the expandable screen may further comprise a plurahty of skid rods made of metal rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen, said skid rods being welded to the outer periphery of the outer spiral wedge-wire screen.
  • support rods have either a wedge-shape or a polygonal shape.
  • the support rods preferably have a length in the radial direction of the screen which is larger than a length in the radial direction of the screen of the outer spiral wedge-wire screen.
  • a method for installing an expandable screen for a horizontal or high-angle well comprising:
  • FIG. 1 is a perspective view showing a preferred embodiment of the invention
  • FIG. 2 is a cross section of the embodiment
  • FIG. 3 is a partially enlarged perspective view of a spiral wedge-wire screen
  • FIG. 4 is a perspective view showing the spiral wedge -wire screen in a state before cutting
  • FIG. 5 is a cross section showing a state in which the screen is installed in a well
  • FIG. 6 is a perspective view showing a manner of cutting connection wires
  • FIG. 7 is a perspective view showing the spiral wedge-wire in an expanded state
  • FIG. 8 is a cross section of the state of FIG. 7;
  • FIG. 9 is a cross section showing a modified example of a manner of connecting the connecting wires.
  • FIG. 10 is a perspective view showing another embodiment of the invention.
  • FIG. 11 is cross section showing the spiral wedge-wire screen in an expanded state
  • FIG. 12 is a perspective view showing another embodiment of the invention.
  • FIG. 13A is a cross section showing the screen installed in the well
  • FIG. 13B is a cross section showing the outer spiral wedge-wire screen in an expanded state
  • FIG. 14 is a perspective view showing another embodiment of the invention.
  • FIG. 15 is a cross section showing the outer spiral wedge-wire screen in an expanded state
  • FIG. 16 is a perspective view showing another embodiment of the invention.
  • FIG. 17 is a cross section showing the outer spiral wedge-wire screen in an expanded state
  • FIG. 18A is a perspective view showing another embodiment of the invention.
  • FIG. 18B is a cross section of this embodiment
  • FIG. 19 is a cross section showing a rounded steel plate in an expanded state
  • FIG. 20 is a cross section showing another embodiment of the invention with its spiral wedge-wire screen being in an expanded state
  • FIG. 21 is a cross section showing another embodiment of the invention with its spiral wedge-wire screen being in an expanded state
  • FIG. 22 is a partial enlarged view of FIG. 20;
  • FIG. 23 is a view showing another example of a section of the support rods.
  • FIG. 24 is a cross section showing another embodiment of the invention with its spiral wedge- wire being in an expanded state
  • FIG. 25 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 26 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 27 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 28 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 29 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 30 is a cross section showing another embodiment of the invention with its spiral wedge wire being in an expanded state
  • FIG. 31 is a cross section of the embodiment
  • FIG. 32 is a sectional view schematically showing a horizontal well
  • FIG. 33 is a sectinal view showing a gravel filled state in a vertical well; and FIGs. 34A and 34B are sectional view showing a state of disposition of a conventional screen in a horizontal well.
  • FIGs. 1 to 9 show one embodiment of the present invention.
  • a middle portion of a spiral wedge-wire screen is omitted for convenience of illustration.
  • An expandable screen 1 comprises a perforated base pipe 2 formed with a multitude of hquid collection holes 2a and a spiral wedge-wire screen 3 provided on the outer periphery of the perforated base pipe 2.
  • the spiral wedge- wire screen 3 comprises a plurahty of support rods 4 extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire 5 wound about the support rods 4 on the outer peripheral side of the support rods to form a sht of a predetermined width and being welded to the support rods 4.
  • the spiral wedge-wire 5 is cut in the axial direction of the screen at a point C in the circumferential direction.
  • the spiral wedge-wire screen 3 has an outer diameter which is almost equal to or shghtly smaller than a diameter of a well-bore in which the screen is installed in a state in which the spiral wedge-wire screen 3 is expanded and an inner diameter (i.e.., inner diameter of the spiral wedge-wire 5) which is larger than an outer diameter of the perforated base pipe 2 by a predetermined value.
  • the support rods 4 constitute support members for the spiral wedge-wire 5 and are made of steel rods having a circular cross section.
  • the support rods 4 may be made of rods of other cross section such as a polygonal cross section.
  • the support rods 4 are disposed generally cylindrically in the circumferential direction of the screen.
  • the spiral wedge-wire 5 On the outside surface of the support rods 4 is wound the spiral wedge-wire 5 in the direction substantially crossing the support rods 4.
  • the spiral wedge-wire 5 is arranged in such a manner that its flat surface 5b faces outside and the other two sides 5c and 5d define the sht 5a with the adjacent wedge-wire portion which widens gradually radially inwardly, i.e., toward the inside of the screen.
  • the spiral wedge-wire 5 is welded at its inside apex 5e to the support rods 4.
  • the width of the slit 5a in the axial direction of the spiral wedge-wire 5 is so set that the width of the sht 5a at the same plane as the outside surface of the spiral wedge-wire 5 will become smaller than the width of the outside surface of the spiral wedge- wire 5.
  • the spiral wedge-wire screen 3 can be obtained by, as shown in FIG. 4, forming a normal wedge-wire screen 3' and cutting it in the axial direction of the screen at a point C in the circumferential direction.
  • the width of the sht of the spiral wedge-wire is preferably set at a proper value within a range from 0.1mm to 3mm.
  • the spiral wedge-wire screen 3 wrapped on the outer periphery of the perforated base pipe 2 is elastically deformed by forcibly superposing end portions 3a and 3b in the circumferential direction of thereof one upon the other thereby urging (energizing) the superposed end portions 3a and 3b to expand.
  • the end portion 3a on the outer peripheral side of the superposed end portions 3a and 3b is connected at a predetermined interval in the axial direction of the screen to a portion 3c of the spiral wedge-wire screen 3 other than the superposed end portions 3a and 3b by means of connecting wires 6 which pass through a hollow central portion 2b of the perforated base pipe 2.
  • end portions of the spiral wedge-wire 5 of the spiral wedge -wire screen 3 corresponding to the end portions 3 a and 3b are formed at a predetermined interval with insertion holes 5f and 5g (FIG. 2) for inserting the connecting wires 6 therethrough and a portion of the spiral wedge-wire 5 which is diametrically opposite to the holes 5f and 5g is formed with insertion holes 5h (FIG. 2) for inserting the connecting wires 6 therethrough.
  • Each of the connecting wires 6 is made, for example, by twining a plurahty of steel lines together.
  • the end portion 3a on the outer peripheral side of the spiral wedge-wire screen 3 is connected to the portion 3c of the spiral wedge-wire screen 3 other than the end portions 3a and 3b.
  • the portion 3c other than the end portions is a portion which is diametrically opposed to the end portions 3a and 3b and the connecting wires 6 extend in the diametrical direction through the hollow central portion 2b of the perforated base pipe 2 from the end portion 3a to the portion 3c.
  • the portion other than the end portions 3a and 3b to which the connecting wires 6 are connected is not hmited to the portion diametrically opposed to the end portions 3a and 3b but it may be a portion which is deviated from the portion diametrically opposed to the end portions 3a and 3b, such as a portion 3d shown in FIG. 9, so long as it is in a location where a connecting wire cutting pipe or rod to be described later can abut against the connecting wires 6 when the cutting pipe or rod is inserted in the perorated base pipe 2.
  • the screen 1 is placed in a well bore 7 of a horizontal or high-angle well and then, as shown in FIG. 6, a connecting wire cutting pipe or rod 8 having an outer diameter which is smaller than the inner diameter of the perforated base pipe 2 and is sufficient for abutting against the connecting wires 6 passing through the hollow central portion 2b of the perforated base pipe 2 when the connecting wire cutting pipe or rod 8 is inserted in the perforated base pipe 2 is inserted in the perforated base pipe 2 and the connecting wires 6 extending in the perforated base pipe 2 at a predetermined interval in the axial direction of the screen are cut one by one by the connecting wire cutting pipe or rod 8.
  • the elastically deformed spiral wedge- wire screen 3 of the screen 1 thereby expands and assumes the form shown in FIG. 7.
  • the spiral wedge- wire screen 3 is disposed in a manner to cover an inner wall 7 of the well bore 7 as shown in FIG. 8, and thereby prevents movement of sand grains accompanying flowing in of crude oil.
  • a gap 3g is produced between the end portions 3a and 3b of the spiral wedge-wire screen 3 and the screen 1 may be designed in such a manner that this gap 3g becomes smaller than the diameter of sand which should be prevented from flowing into the screen 1.
  • FIGs. 10 and 11 show another embodiment of the invention in which FIG. 10 is a perspective view thereof and FIG. 11 is a cross section showing the expandable screen installed in a well in an expanded state.
  • FIG. 10 is a perspective view thereof
  • FIG. 11 is a cross section showing the expandable screen installed in a well in an expanded state.
  • the same or similar components as those of the embodiment of FIGs. 1 to 9 are designated by the same reference characters and description thereof will be omitted.
  • a wire mesh llextending in the axial direction of the screen is provided between end portions 3a and 3b in the circumferential direction of a spiral wedge-wire screen 3 and end portions 11a and lib of the wire mesh 11 in the circumferential direction (FIG. ll) are welded to the end portions 3a and 3b of the spiral wedge-wire screen 3.
  • FIG. 11 when the spiral wedge-wire screen 3 has expanded, a gap 3g produced between the end portions 3a and 3b thereof is closed by the wire mesh 11 whereby invasion of sand into the screen through the gap 3g can be prevented. Therefore, movement of sand can be more effectively prevented.
  • FIGs. 12, 13A and 13B show another embodiment of the invention in which FIG. 12 is a perspective view and FIG. 13A is a cross section showing an expandable screen installed in a well bore and FIG. 13B is a cross section showing the expandable screen in an expanded state.
  • an expandable screen 20 comprises a perforated base pipe 2 formed with a multitude of hquid collection holes 2a and an inner spiral wedge-wire screen 23 comprising a plurahty of support rods 24 extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire 25 wound about the support rods 24 on the outer peripheral side of the support rods 24 to form a sht 25a of a predetermined width and being welded to the support rods 24.
  • the expandable screen 20 further comprises an outer spiral wedge-wire screen 3 comprising a plurahty of support rods 4 extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen and a spiral wedge wire 5 wound about the support rods 4 on the outer peripheral side of the support rods 4 to form a sht 5a of a predetermined width and being welded to the support rods 4.
  • the spiral wedge-wire 5 is cut in the axial direction of the screen at a point C in the circumferential direction.
  • the outer spiral wedge -wire screen 3 has an outer diameter which is almost equal to or shghtly smaller than a diameter of a well-bore in which the screen is installed and an inner diameter which is larger than an outer diameter of the inner spiral wedge-wire screen 23 by a predetermined value.
  • the outer spiral wedge-wire screen 3 is wrapped on the outer periphery of the inner sprial wedge-wire screen 23 with end portions 3a and 3b of the outer spiral wedge-wire screen 3 in the circumferential direction being superposed one upon the other and thereby urging the outer spiral wedge-wire screen 3 to expand, and the end portion 3a on the outer peripheral side of the outer superposed end portions 3a and 3b is connected at a predetermined interval in the axial direction of the screen to a portion 3c of the outer spiral wedge-wire screen 3 other than the superposed end portions 3a and 3b by means of connecting wires 6 which pass through a hollow central portion 2b of the perforated base pipe 2 and connecting wire insertion holes 25b and 25c formed in the inner spiral wedge-wire 25.
  • FIGs. 14 and 15 show another embodiment of the invention in which FIG. 14 is a perspective view of an expandable screen of the embodiment and FIG. 15 is a cross section showing the expandable screen installed in a well bore in an expanded state.
  • This embodiment is a modification of the expandable screen shown in FIG. 12 having an outer spiral wedge- wire screen.
  • An expandable screen 30 has a mesh filter 32 made of wire-mesh covering the entire outer peripheral surface of the outer spiral wedge- wire screen 3.
  • end portions 32a an 32b in the circumferential direction of the mesh filter 32 are welded to the end portions 3a and 3b of the outer spiral wedge-wire screen 3.
  • FIGs. 16 and 17 show another embodiment of the invention in which FIG. 16 is a perspective view of an expandable screen of the embodiment and FIG. 17 is a cross section showing the expandable screen installed in a well bore in an expanded state.
  • This embodiment is a modification of the expandable screen of FIG. 12 having an outer spiral wedge-wire screen
  • An extendable screen 40 further has a plurahty of skid rods 42 made of metal rods extending in the axial direction of the screen and disposed at a predetermined interval in the circumferential direction of the screen.
  • the skid rods 42 are welded to the outer periphery of the outer spiral wedge-wire screen 3.
  • the skid rods 42 are made of linear steel wires having a wedge-shaped cross section.
  • the skid rods 42 are arranged as in the outer spiral wedge- wire 5, in such a manner that their flat surfaces 42b face outside and the other two sides 42c and 42 d define space with the adjacent skid rods which widens gradually radially inwardly, i.e., toward the inside of the screen.
  • the skid rods 42 are welded at their inside apexes 42 e to the flat surface 5b of the outer periphery of the outer spiral wedge -wire 5.
  • the interval of the adjacent skid rods 42 is so set that the interval at the same plane as the outside flat surface 42b will become larger than the width of the outside flat surface 42b.
  • the shape of the skid rods 42 is not hmited to the illustrated one but other shape such as a circular cross section and a polygonal cross section may be used. In any case, the interval between the adjacent skid rods 42 is so set that it will become larger than the diameter of the skid rods 42.
  • the skid rods 42 perform the function of a sleigh in inserting the screen into the well bore and thereby mitigates friction between the outer periphery of the screen and the wall of the well.
  • the screen can be inserted in the well bore easily and smoothly and time required for inserting the screen in the well bore can be shortened.
  • the skid rods 42 protect the outer spiral wedge-wire screen provided on the outermost periphery of the screen from the outside and, therefore, the outer spiral wedge-wire screen does not come into direct contact with the wall of the well whereby damage to the outer spiral wedge-wire screen due to friction with the wall of the well can be prevented.
  • FIGs. 18A, 18B and 19 show another embodiment of the invention in which FIG. 18A is a perspective view of an expandable screen, FIG. 18B is a cross section of the expandable screen and FIG. 19 is a cross section showing the expandable screen installed in a well bore in an expanded state.
  • the mesh filter is shown partially in FIG. 18A.
  • an expandable screen 50 comprises a perforated base pipe 2 formed with a multitude of hquid collection holes 2a and a plurahty of steel plates 52 in the form of a belt rounded annularly and wrapped on the outer periphery of the base pipe 2 at a predetermined interval in the axial direction of the screen with end portions 52a and 52b of each of the steel plates 52 being superposed one upon the other thereby urging the steel plate 52 to expand.
  • the end portion 52a on the outer peripheral side of the superposed end portions 52a and 52b is connected to a portion 52c of the steel plate 52 other than the superposed end portions 52a and 52b by means of connecting wires 6 which pass through a hollow central portion 2b of the perforated base pipe 2.
  • a mesh filter 53 covers the outer periphery of a portion of the perforated base pipe 2 between the rounded steel plates 52 provided at both ends in the axial direction of the screen and the outer periphery of the respective steel plates 52. End portions in the circumferential direction of the screen of the mesh filter 53 are welded to the end portions 52a and 52b in the circumferential direction of the screen of the steel plates 52.
  • the screen 50 is installed in a well bore 7 of a horizontal or high- angle well and then a connecting wire cutting pipe (or rod) (not shown) having an outer diameter which is smaller than the inner diameter of the perforated base pipe 2 and is sufficient for abutting against the connecting wires 6 passing through the hollow central portion 2b of the perforated base pipe 2 when the connecting wire cutting pipe or rod is inserted in the perforated base pipe 2 is inserted in the perforated base pipe 2 and the connecting wires 6 are cut one by one.
  • a connecting wire cutting pipe or rod
  • the elastically deformed steel plates 52 of the screen 50 thereby expand to assume the state shown in FIG. 19 and the mesh filter 53 covers the inner wall 7a thereby preventing movement of sand.
  • a gap 52g is produced between the end portions 52a and 52b of the expanded steel plates 52 and the screen 50 is designed so that the gap 52g will become sufficiently smaller than the diameter of sand grain which should be prevented from flowing into the screen.
  • FIGs. 20 and 21 show a modification of the embodiment of FIG. 1.
  • FIGs. 20 and 21 are cross sections showing an expandable wedge- wire screen in an expanded state.
  • illustration of the perforated base pipe is omitted for convenience of illustration.
  • a support rod 60 has a wedge-shaped cross section as will be apparent from FIG. 22 showing it in a partially enlarged scale with two sides 60a thereof being formed in flat surfaces.
  • Length LI of the support rod 60 in the radial direction of the screen is designed to be larger than length L2 of the wedge wire screen 3 in the radial direction of the screen.
  • FIG. 20 shows a case where the end portions 3a and 3b shde in directions X and X' with the end portion 3b sliding inside of the end portion 3a.
  • FIG. 21 shows a case where the end portions 3a and 3b shde in directions X and X' with the end portion 3a sliding inside of the end portion 3b.
  • the edge of the end portion 3b abuts against the endmost support rod 60 provided in the other end portion 3a and the support rod 60 thereby performs a function as a stopper, preventing further relative sliding movement of the end portions 3a and 3b in the directions X and X'.
  • the support rod 60 has a wedge-shaped cross section and the side surface of the support rod 60 to which the end portion 3a or 3b abuts is a flat surface and therefore is not so shppery as a support rod of a circular cross section, the support rod 60 can support the edge of the end portion 3a or 3b more securely than the support rod of a circular cross section.
  • a support rod 70 may have a pentagonal cross section or other cross section which has a flat side surface extending in the radial direction of the screen.
  • FIG. 24 shows another embodiment which is a modification of the screen having skid rods shown in FIG. 16.
  • FIG. 24 is a cross section showing an expandable wedge-wire screen in an expanded state.
  • illustration of the perforated base pipe and the inner spiral wedge-wire screen is omitted for convenience of illustration.
  • a support rod 60 has a wedge-shaped cross section.
  • an endmost support rod 60 disposed in the end portion 3b abuts against an endmost skid rod 42 disposed in the end portion 3a whereby the skid rod 42 functions as a stopper and prevents further relative sliding movement of the end portions 3a and 3b in the directions X and X'.
  • FIGs. 25 and 26 show another embodiment which is a modification of the embodiment of FIG. 1. These figures show an expandable wedge-wire screen in an expanded state. Illustration of the perforated base pipe is omitted for convenience of illustration.
  • a support rod 60 has a wedge-shaped cross section.
  • This embodiment is different from the embodiment of FIG. 1 in that a filter mesh 80 is provided inside of the support rods 60 and is welded to the support rods 60 for enhancing the filter function after expansion of the screen.
  • the function of the support rod 60 as a stopper in the case where end portions 3a and 3b of a wedge-wire screen 3 shde in an offset state in directions X and X' due to pressure apphed by crude oil and sand is the same as that of the embodiment shown in FIGs. 20 and 21 and, therefore, detailed description thereof will be omitted.
  • FIG. 27 shows another embodiment which is a modification of the embodiment of FIG. 16 having skid rods. This figure is a cross section showing an expandable wedge- wire screen in an expanded state.
  • a support rod 60 has a wedge-shaped cross section.
  • This embodiment is different from the embodiment of FIG. 16 in that a filter mesh 80 is provided inside of the support rods 60 and is welded to the support rods 60 for enhancing the filter function after expansion of the screen.
  • the function of the support rod 60 as a stopper in the case where end portions 3a and 3b of a wedge-wire screen 3 shde in an offset state in directions X and X' due to pressure apphed by crude oil and sand is the same as that of the embodiment shown in FIGs. 20 and 21 and, therefore, detailed description thereof will be omitted.
  • FIGs. 28 and 29 show another embodiment which is a modification of the embodiment of FIG. 14 having a mesh filter.
  • These figures are cross sections showing an expandable wedge-wire screen in an expanded state. Illustration of the perforated base pipe and inner spiral wedge-wire screen is omitted for convenience of illustration.
  • This embodiment is different from the embodiment of FIG. 14 in that the support rod 60 has a wedge-shaped cross section.
  • the function of the support rod 60 as a stopper in the case where end portions 3a and 3b of a wedge-wire screen 3 shde in an offset state in directions X and X' due to pressure apphed by crude oil and sand is the same as that of the embodiment shown in FIGs. 20 and 21 and, therefore, detailed description thereof will be omitted.
  • FIGs. 30 and 31 show another embodiment which is a modification of the embodiment of FIG. 1.
  • FIG. 30 is a vertical section showing an expandable wedge-wire screen in an expanded state and
  • FIG. 31 is a cross section thereof.
  • the same component parts as those of FIG. 1 are designated by the same reference characters and description thereof will be omitted.
  • a plurahty of perforated base pipes 2 are connected in series by a joint 82 and a spiral wedge-wire screen 3 provided on the outer peripheral side of the perforated base pipes 2 consists of a plurahty of screen portions 3-1, 3-2 etc. disposed at a predetermined interval in the axial direction of the screen.
  • a mesh filter 80 is provided over the outer peripheral surface of the screen portions, a gap 3g (FIG. 31) between the end portions in the circumferential direction of the respective screen portions 3-1, 3-2 etc. and the interval 83 between adjacent ones of the screen portions 3-1, 3-2 etc. End portions of the mesh filter 80 in the axial direction of the screen are fixed by rings 80a to the outer periphery of the perforated base pipe 2 in the vicinity of the joint 82.
  • the spiral wedge-wire screen 3 is divided in the axial direction into a plurahty of screen portions 3-1, 3-2 etc. with the predetermined interval 83, the screen can pass easily through a curved portion of the horizontal well and, further, when the wedge- wire screen 3 has expanded, the mesh filter 80 expands even to a small gap between the wall 7a and the wedge-wire screen 3 thereby preventing movement of sand more completely. Since, further, the interval 83 between the screen portions 3-1, 3-2 etc. is covered by the mesh filter 80, invasion of sand from this interval 83 can also be prevented.
  • the expandable screen according to the invention is useful for preventing invasion of sand accompanying flow of hquid such as crude oil into the screen in a horizontal or high- angle well.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • 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)
  • Filtration Of Liquid (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne un filtre extensible pour puits horizontal ou sous grand angle, comprenant : un tube de base perforé (2) présentant une pluralité de trous collecteurs de liquide (2a), un filtre (3) à fil métallique spiral à section tronconique,, présentant une pluralité de tiges supports (4) et un fil spiral à section tronconique (5) enroulé autour des tiges supports sur les parties périphériques externes de ces tiges, de manière à former une fente (5a) d'une largeur prédéterminée, et soudé auxdites tiges supports. Le fil spiral à section tronconique (5) est coupé dans le sens axial du filtre, en un point (C). Le filtre (3) à fil spiral à section tronconique est enroulé sur le tube de base perforé (2), et les portions d'extrémité (3a, 3b) dudit filtre (3) sont superposées, contraignant ainsi le filtre à fil spiral à se détendre, la portion d'extrémité (3a) étant reliée à une portion (3c) du filtre (3) à fil spiral à section tronconique au moyen de fils métalliques de jonction (6).
PCT/JP2003/005805 2002-05-27 2003-05-09 Filtre extensible pour puits horizontal ou sous grand angle, et son procede d'installation WO2003100211A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003235909A AU2003235909A1 (en) 2002-05-27 2003-05-09 Expandable screen for a horizontal or high-angle well and method for installing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002152306A JP2003342977A (ja) 2002-05-27 2002-05-27 水平井戸用または傾斜井戸用拡開可能スクリーンおよびその施工法
JP2002-152306 2002-05-27

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WO2003100211A1 true WO2003100211A1 (fr) 2003-12-04

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AU (1) AU2003235909A1 (fr)
WO (1) WO2003100211A1 (fr)

Cited By (12)

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GB2410272A (en) * 2002-10-15 2005-07-27 Schlumberger Holdings Expandable sand screen with slidably engaged strands that move to create filtration openings
US7168485B2 (en) 2001-01-16 2007-01-30 Schlumberger Technology Corporation Expandable systems that facilitate desired fluid flow
US8146662B2 (en) 2009-04-08 2012-04-03 Halliburton Energy Services, Inc. Well screen assembly with multi-gage wire wrapped layer
US8251138B2 (en) 2009-04-09 2012-08-28 Halliburton Energy Services, Inc. Securing layers in a well screen assembly
US8291971B2 (en) 2010-08-13 2012-10-23 Halliburton Energy Services, Inc. Crimped end wrapped on pipe well screen
US8479810B2 (en) 2007-06-26 2013-07-09 Paul David Metcalfe Downhole apparatus
WO2014109732A1 (fr) * 2013-01-08 2014-07-17 Halliburton Energy Services, Inc. Outil de complétion de puits a crible extensible
CN104033135A (zh) * 2013-03-05 2014-09-10 兰州正丰石油化工技术装备有限责任公司 高压天然气井割缝夹克防砂管
US9353606B2 (en) 2010-11-16 2016-05-31 Darcy Technologies Limited Downhole method and apparatus
CN110513045A (zh) * 2019-09-12 2019-11-29 长江水利委员会长江科学院 一种新型复合防砂排水减压井挤土成孔装置及方法
NO20211086A1 (en) * 2021-09-09 2023-03-10 Isealate As Sand screens and related products and methods
KR102526834B1 (ko) * 2021-11-19 2023-04-27 미츠비시 쥬코 칸쿄 카가쿠 엔지니어링 가부시키가이샤 스크린 장치

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168485B2 (en) 2001-01-16 2007-01-30 Schlumberger Technology Corporation Expandable systems that facilitate desired fluid flow
GB2410272B (en) * 2002-10-15 2006-01-11 Schlumberger Holdings Expandable sandscreens
GB2410272A (en) * 2002-10-15 2005-07-27 Schlumberger Holdings Expandable sand screen with slidably engaged strands that move to create filtration openings
US8479810B2 (en) 2007-06-26 2013-07-09 Paul David Metcalfe Downhole apparatus
US8555985B2 (en) 2007-06-26 2013-10-15 Paul David Metcalfe Permeability modification
US8146662B2 (en) 2009-04-08 2012-04-03 Halliburton Energy Services, Inc. Well screen assembly with multi-gage wire wrapped layer
US9605518B2 (en) 2009-04-09 2017-03-28 Halliburton Energy Services, Inc. Securing layers in a well screen assembly
US8251138B2 (en) 2009-04-09 2012-08-28 Halliburton Energy Services, Inc. Securing layers in a well screen assembly
US10145221B2 (en) 2009-04-09 2018-12-04 Halliburton Energy Services, Inc. Securing layers in a well screen assembly
US8291971B2 (en) 2010-08-13 2012-10-23 Halliburton Energy Services, Inc. Crimped end wrapped on pipe well screen
US9353606B2 (en) 2010-11-16 2016-05-31 Darcy Technologies Limited Downhole method and apparatus
US10337297B2 (en) 2010-11-16 2019-07-02 Halliburton Manufacturing And Services Limited Downhole method and apparatus
WO2014109732A1 (fr) * 2013-01-08 2014-07-17 Halliburton Energy Services, Inc. Outil de complétion de puits a crible extensible
CN104033135A (zh) * 2013-03-05 2014-09-10 兰州正丰石油化工技术装备有限责任公司 高压天然气井割缝夹克防砂管
CN104033135B (zh) * 2013-03-05 2016-12-28 兰州正丰石油化工技术装备有限责任公司 高压天然气井割缝夹克防砂管
CN110513045A (zh) * 2019-09-12 2019-11-29 长江水利委员会长江科学院 一种新型复合防砂排水减压井挤土成孔装置及方法
CN110513045B (zh) * 2019-09-12 2024-06-11 长江水利委员会长江科学院 一种新型复合防砂排水减压井挤土成孔装置及方法
NO20211086A1 (en) * 2021-09-09 2023-03-10 Isealate As Sand screens and related products and methods
KR102526834B1 (ko) * 2021-11-19 2023-04-27 미츠비시 쥬코 칸쿄 카가쿠 엔지니어링 가부시키가이샤 스크린 장치

Also Published As

Publication number Publication date
AU2003235909A1 (en) 2003-12-12
JP2003342977A (ja) 2003-12-03

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