EP1286019A1 - Sabot de retenue expansible - Google Patents

Sabot de retenue expansible Download PDF

Info

Publication number
EP1286019A1
EP1286019A1 EP02255754A EP02255754A EP1286019A1 EP 1286019 A1 EP1286019 A1 EP 1286019A1 EP 02255754 A EP02255754 A EP 02255754A EP 02255754 A EP02255754 A EP 02255754A EP 1286019 A1 EP1286019 A1 EP 1286019A1
Authority
EP
European Patent Office
Prior art keywords
shoe
segments
retaining
element assembly
packer element
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.)
Granted
Application number
EP02255754A
Other languages
German (de)
English (en)
Other versions
EP1286019B1 (fr
Inventor
Donald R. Smith
Lloyd A. Crockford
Donald W. Winslow
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.)
Halliburton Energy Services Inc
Original Assignee
Halliburton Energy Services Inc
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 Halliburton Energy Services Inc filed Critical Halliburton Energy Services Inc
Publication of EP1286019A1 publication Critical patent/EP1286019A1/fr
Application granted granted Critical
Publication of EP1286019B1 publication Critical patent/EP1286019B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1204—Packers; Plugs permanent; drillable
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing

Definitions

  • This invention relates generally to downhole tools for use in wellbores and, more particularly, to such tools having a packer element, and to improvements in preventing undesired extrusion of packer seal elements between segmented non-metallic packer element shoes.
  • downhole tools In the drilling or reworking of oil wells, a great variety of downhole tools are used. For example, but not by way of limitation, it is often desirable to seal tubing or other pipe in the casing of the well, such as when it is desired to pump cement or other slurry down the tubing and force the cement or slurry around the annulus of the tubing or out into a formation. It then becomes necessary to seal the tubing with respect to the well casing and to prevent the fluid pressure of the slurry from lifting the tubing out of the well or for otherwise isolating specific zones in which a wellbore has been placed. Downhole tools referred to as packers and bridge plugs are designed for these general purposes and are well-known in the art of producing oil and gas.
  • a drill bit In drilling, a drill bit is used to cut and grind up the components of the downhole tool to remove it from the wellbore. This is a much faster operation than milling, but requires the tool to be made out of materials which can be accommodated by the drill bit.
  • soft and medium hardness cast iron are used on the pressure bearing components, along with some brass and aluminum items.
  • Packers of this type include the Halliburton EZ Drill® and EZ Drill® Super Surge SV squeeze packers.
  • the EZ Drill® Super Surge SV squeeze packer for example, includes a lock ring housing, upper slip wedge, lower slip wedge, and lower slip support made of soft cast iron. These components are mounted on a mandrel made of medium hardness cast iron.
  • the EZ Drill® Super Surge bridge plug is also similar, except that it does not provide for fluid flow therethrough.
  • the EZ Drill® packer and bridge plug and the EZ Drill® SV packer are designed for fast removal from the wellbore by either rotary or cable tool drilling methods. Many of the components in these drillable packing devices are locked together to prevent their spinning while being drilled, and the harder slips are grooved so that they will be broken up in small pieces. Typically, standard "tri-cone" rotary drill bits are used which are rotated at speeds of about 75 to about 120 rpm. A load of about 5,000 to about 7,000 pounds of weight is applied to the bit for initial drilling and increased as necessary to drill out the remainder of the packer or bridge plug, depending upon its size. Drill collars may be used as required for weight and bit stabilization.
  • Such drillable devices have worked well and provide improved operating performance at relatively high temperatures and pressures.
  • the packers and bridge plugs mentioned above are designed to withstand pressures of about 10,000 psi (700 Kg/cm z) and temperatures of about 425° F (220° C) after being set in the wellbore. Such pressures and temperatures require using the cast iron components previously discussed.
  • bit tracking can occur, wherein the drill bit stays on one path and no longer cuts into the downhole tool. When this happens, it is necessary to pick up the bit above the drilling surface and rapidly recontact the bit with the packer or plug and apply weight while continuing rotation. This aids in breaking up the established bit pattern and helps to reestablish bit penetration. If this procedure is used, there are rarely problems. However, operators may not apply these techniques or even recognize when bit tracking has occurred. The result is that drilling times are greatly increased because the bit merely wears against the surface of the downhole tool rather than cutting into it to break it up.
  • the assignee of the present invention introduced to the industry a line of drillable packers and bridge plugs currently marketed by the assignee under the trademark FAS DRILL®.
  • the FAS DRILL® line of tools consist of a majority of the components being made of non-metallic engineering grade plastics to greatly improve the drillability of such downhole tools.
  • the FAS DRILL® line of tools have been very successful and a number of U.S. patents have been issued to the assignee of the present invention, including U.S. Patent No. 5,271,468 to Streich et al., U.S. Patent No. 5,224,540 to Streich et al., and U.S. Patent No. 5,390,737 to Jacobi et al.
  • the preceding patents are specifically incorporated herein by reference.
  • packer shoes and optional back up rings made of a metallic material are employed not so much as a first choice but due to the metallic shoes and back up rings being able to withstand the temperatures and pressures typically encountered by a downhole tool deployed in a borehole.
  • the tool discussed in the '279 patent preferably employed the general geometric configuration of previously known drillable non-metallic packers and bridge plugs such as those disclosed in U.S. Patent No. 5,271,468 to Streich et al., U.S. Patent No. 5,224,540 to Streich et al., and U.S. Patent No. 5,390,737 to Jacobi et al. while replacing essentially all of the few remaining metal components of the tools disclosed in the preceding patents with non-metallic materials which can still withstand the pressures and temperatures found in many wellbore applications.
  • the apparatus also includes specific design changes to accommodate the advantages of using essentially only plastic and composite materials and to allow for the reduced strengths thereof compared to metal components.
  • the '279 embodiment comprised a center mandrel and slip means disposed on the mandrel for grippingly engaging the wellbore when in a set position, a packing means disposed on the mandrel for sealingly engaging the wellbore when in a set position, a slip means comprising a slip wedge positioned around the center mandrel, a plurality of slip segments disposed in an initial position around the mandrel and adjacent to the slip wedge, and retaining means for holding the slip segments in an initial position. The slip segments would then expand radially outward upon being set so as to grippingly engage the wellbore.
  • Hardened inserts can be molded, or otherwise installed into the slips, and can be metallic such as hardened steel, or non-metallic such as a ceramic material.
  • the slip means included a slip wedge installed on the mandrel and the slip segments, whether retained by a retaining band or whether retained by an integral ring portion, have co-acting planar, or flat portions, which provided a superior sliding bearing surface especially when the slip means were made of a non-metallic material such as engineering grade plastics, resins, phenolics, or composites.
  • the larger O.D. packer elements, and smaller O.D. packer elements upon being subjected to elevated pressures and temperatures, were subject to being extruded through these gaps thereby possibly damaging the packer element and jeopardizing the integrity of the seal between the wellbore and the packer elements.
  • the assignee of the present invention filed a patent application on March 29, 1996, which issued as U.S. Patent No. 5,701,959 (the '959 patent) on December 30, 1997, the details of which are incorporated by reference.
  • the '959 invention like the '279 invention, included a non-metallic shoe having a multitude of co-acting non-metallic segments and at least one retaining band, and preferably two retaining bands for holding the shoe segments in place after initial assembly and during the running of the tool into the wellbore and prior to the sealing of the associated packer element within the wellbore.
  • the invention described in the '959 patent provided a disk, to act as a gap spanning, structural member.
  • the shoe segments described in the '959 patent include disk pockets on an inner surface thereof. Each disk pocket is centered over the gap that it is to bridge, so that a pocket for a single disk comprises two half pockets located on adjacent shoe segments.
  • the disk in the '959 patent was designed to span the gap between adjacent segments that increases in size when the packer element is set in the wellbore.
  • an easily drillable downhole packer-type tool apparatus preferably being made at least partly, if not essentially entirely, of non-metallic, such as, but not limited to, composite components, and which include expandable packer elements to be partially retained by non-metallic segmented packer element shoes, or retaining rings that prohibit, or at least significantly reduce, unwanted extrusion of packer elements between gaps of such segmented shoes or segmented rings.
  • the present invention provides a downhole apparatus for use in a wellbore having a casing therein, the apparatus comprising: a packer mandrel; a packer element assembly disposed about said packer mandrel, said packer element assembly having an upper end and a lower end, and being movable from an unset to a set position wherein said packer element assembly engages said casing in said set position; and at least one retaining shoe for axially retaining said packer element assembly, said retaining shoe comprising: a first shoe, said first shoe comprising a plurality of first shoe segments disposed about said packer mandrel, said plurality of first shoe segments engaging one of said upper and lower ends of said sealing element assembly, adjacent ones of said first shoe segments having gaps therebetween; and a second shoe, said second shoe comprising a plurality of second shoe segments disposed about and engaging said first plurality of shoe segments, adjacent ones of said plurality of said second shoe segments having gaps therebetween, said retaining shoe having an initial position and a radi
  • the invention provides a retaining shoe for limiting the extrusion of a packer element assembly disposed about a packer mandrel, said packer element assembly being movable from an unset to a set position in a wellbore, wherein in said set position said packer element assembly seals against a casing in said wellbore, the retaining shoe comprising: a plurality of first shoe segments encircling said packer mandrel, said first shoe segments defining a sloped, arcuate inner surface for engaging an end of said packer element assembly, adjacent ones of said first shoe segments having gaps therebetween; and a plurality of second shoe segments disposed about said first shoe segments said second shoe segments defining a sloped, arcuate inner surface for engaging a sloped arcuate outer surface of said first shoe segments, said second shoe segments having gaps therebetween; wherein a width of said gaps between said first shoe segments and a width of said gaps between said second shoe segments increases when said packer element assembly moves from said unset to said set position, and where
  • the invention provides a downhole apparatus for use in a wellbore having casing therein, the apparatus comprising: a mandrel having an axial centerline; a packer element assembly disposed about said mandrel, said packer element assembly having an upper end and a lower end and being movable from an unset position wherein said packer assembly and said casing define an annular gap therebetween, to a set position wherein said packer element assembly sealingly engages said casing; an upper retaining shoe for axially retaining said packer element, the upper retaining shoe comprising an inner retainer and outer retainer, the inner retainer comprising: a generally cylindrical shoe body disposed about said mandrel; and a fin connected to and extending radially outwardly from said body, wherein said fin engages said upper end of said packer element assembly, the outer retainer being disposed about said inner retainer, said inner and outer retainers comprising expandable retainers movable from an initial position corresponding to said unset position of said packer
  • the present invention provides for a downhole apparatus for preventing the extrusion of a packer element assembly installed about a mandrel.
  • the invention includes a mandrel having a longitudinal central axis, a slip means disposed on the mandrel for grippingly engaging the wellbore when set into position, and a packer element assembly which includes at least one packer element to be axially retained about the mandrel.
  • the invention also includes at least one packer element assembly retaining shoe disposed about the mandrel for axially retaining the packer element assembly and for preventing extrusion of the packer element assembly when the tool is set into position.
  • the retaining shoe includes a first or inner shoe and a second or outer shoe.
  • the inner shoe is comprised of a plurality of inner shoe segments. Adjacent ones of the inner shoe segments have gaps therebetween which may be zero when initially installed but which will expand from the initial installed position, wherein the gaps may be zero or slightly greater than zero, to a greater width when the tool is set into position.
  • the inner shoe may comprise a generally cylindrical body which will engage the mandrel and a fin sloping radially outwardly therefrom which will engage the end of the packer element assembly.
  • Each inner shoe segment thus comprises a body portion having a fin portion extending radially outwardly therefrom.
  • the second or outer shoe of the retaining shoe likewise is comprised of a plurality of outer shoe segments. Adjacent ones of the outer shoe segments will spread apart so that the width of a gap therebetween will expand as the retaining shoe moves from its initial position to an expanded position wherein the retaining shoe engages the casing.
  • the expanded position of the retaining shoe corresponds to the set position of the tool in the wellbore in which the packer element assembly engages the wellbore or casing disposed in the wellbore. In the expanded position of the retaining shoe, the retaining shoe engages the casing and prevents, or at least limits extrusion of the packer element assembly.
  • downhole tool, or downhole apparatus 10 is shown in an unset position 11 in a well 15 having a wellbore 20 with a casing 22 cemented therein.
  • Apparatus 10 is shown in set position 13 in FIG. 3.
  • Casing 22 has an inner surface 24.
  • An annulus 26 is defined by casing 22 and downhole tool 10.
  • Downhole tool 10 has a mandrel 28, and may be referred to as a bridge plug due to the tool having a plug 30 being pinned within mandrel 28 by radially oriented pins 32.
  • Plug 30 has a seal means 34 located between plug 30 and the internal diameter of mandrel 28 to prevent fluid flow therebetween.
  • packers typically have at least one means for allowing fluid communication through the tool.
  • Packers may therefore allow for the controlling of fluid passage through the tool by way of a one or more valve mechanisms which may be integral to the packer body or which may be externally attached to the packer body. Such valve mechanisms are not shown in the drawings of the present document.
  • Packer tools may be deployed in wellbores having casings or other such annular structure or geometry in which the tool may be set.
  • Mandrel 28 has an outer surface 36 an inner surface 38, and a longitudinal central axis, or axial centerline 40.
  • An inner tube 42 is disposed in, and is pinned to mandrel 28 to help support plug 30.
  • Tool 10 which may also be referred to as packer apparatus 10, includes the usage of a spacer ring 44 which is preferably secured to mandrel 28 by pins 46.
  • Spacer ring 44 provides an abutment which serves to axially retain slip segments 48 which are positioned circumferentially about mandrel 28.
  • Slip retaining bands 50 serve to radially retain slips 48 in an initial circumferential position about mandrel 28 as well as slip wedge 52.
  • Bands 50 are made of a steel wire, a plastic material, or a composite material having the requisite characteristics of having sufficient strength to hold the slips in place prior to actually setting the tool and to be easily drillable when the tool is to be removed from the wellbore.
  • bands 50 are inexpensive and easily installed about slip segments 48.
  • Slip wedge 52 is initially positioned in a slidable relationship to, and partially underneath slip segments 48 as shown in FIG. 1. Slip wedge 52 is shown pinned into place by pins 54.
  • the preferred designs of slip segments 48 and co-acting slip wedges 52 are described in U.S. Patent No. 5,540,279, the details of which are incorporated herein by reference.
  • packer element assembly 56 Located below slip wedge 52 is a packer element assembly 56, which includes at least one packer element, and as shown in FIG. 1 includes three expandable elements 58 positioned about mandrel 28. Packer element assembly 56 has unset and set positions 57 and 59 corresponding to the unset and set positions 11 and 13 of tool 10. Assembly 56 has upper end 60 and lower end 62.
  • FIG. 9 shows a prior art arrangement wherein a single metallic shoe, such as shoe 64 is disposed about the upper and lower ends 60 and 62, respectively, of the packer element assembly 56.
  • the present invention has retaining rings 66 disposed at the upper and lower ends of packer element assembly 56.
  • Retaining rings or retaining shoes 66 may be referred to as an upper retaining shoe or upper retainer 68 and a lower retaining shoe or lower retainer 70.
  • a slip wedge 72 is disposed on mandrel 28 below lower retaining shoe 70 and is pinned with a pin 74.
  • Located below lower slip wedge 72 are lower slip segments 76.
  • Lower slip wedge 72 and lower slip segments 76 are like upper slip wedge 52 and upper slip segments 48.
  • mule shoe 78 At the lowermost portion of tool 10 is an angled portion referred to as mule shoe 78, secured to mandrel 28 by pin 79.
  • Lowermost portion 78 need not be a mule shoe but can be any type of section which will serve to terminate the structure of the tool or serves to be a connector for connecting the tool with other tools, a valve or tubing, etc. It will be appreciated by those in the art that pins 32, 46, 54, 74 and 79 if used at all are preselected to have shear strengths that allow for the tool to be set and deployed and to withstand the forces expected to be encountered in a wellbore during the operation of the tool.
  • retaining shoes 66 comprise an inner shoe or inner retainer 80 and an outer shoe or outer retainer 82.
  • Inner and outer shoes 80 and 82 may also be referred to as first and second shoes or retainers 80 and 82.
  • Outer shoe 82 is preferably made of a phenolic material available from General Plastics & Rubber Company, Inc., 5727 Ledbetter, Houston, Texas 77087-4095, which includes a direction-specific laminate material referred to as GP-B35F6E21K. Alternatively, structural phenolics available from commercial suppliers may be used.
  • Inner shoes 80 are preferably made of a composite material available from General Plastics & Rubber Company, Inc., 5727 Ledbetter, Houston, Texas 77087-4095. A particular suitable material for at a portion of the inner shoe 80 includes a direction specific composite material referred to as GP-L45425E7K available from General Plastics & Rubber Company, Inc. Alternatively, structural phenolics available from commercial suppliers may be used.
  • inner shoe 80 has a body 88 and a fin or wing 90 extending radially outwardly therefrom.
  • Inner shoe 80 has an inner surface 92 and an outer surface 94.
  • upper and lower ends 60 and 62 of packer element assembly 56 reside directly against upper and lower retainers 68 and 70 and preferably directly against wing 90 of inner shoe 80 at both the upper and lower ends 60 and 62 thereof.
  • Inner shoe 80 is preferably comprised of a plurality of first or inner shoe segments 96 to form an inner shoe 80 that encircles mandrel 28.
  • Inner surface 92 of inner shoe 80 is shaped to accommodate the ends 60 and 62 of the packer element assembly and thus is preferably sloped as well as arcuate to provide a generally truncated conical surface which transitions from having a greater radius proximate to an outer end, or outer face 98 of fin 90 to a smaller radius at an internal diameter 100 which is defined by body 88.
  • Inner shoe 80 also has an inner end, or inner face 99.
  • Inner surface 92 also defines a cylindrical surface on body 88 that engages mandrel 28 in an initial or running position of the tool.
  • Each inner shoe segment 96 has ends 102 and 104 which are flat and convergent with respect to a center reference point which, if the shoe segments are installed about a mandrel will correspond to longitudinal central axis 40 of the mandrel as depicted in FIG. 1. End surfaces 102 and 104 need not be flat and can be of other topology.
  • Each segment 96 has a fin portion 93 and a body portion 95. Fin portions 93 and body portions 95 comprise body 88 and fin 90, respectively of inner shoe 80.
  • FIG. 4 illustrates inner shoe 80 being made of a total eight inner shoe segments 96 to provide a 360° annulus encircling structure to provide a maximum amount of end support for packer elements to be retained in the axial direction. A lesser amount, or greater amount, of shoe segments can be used depending on the nominal diameters of the mandrel, the packer elements, and the wellbore or casing in which the tool is to be deployed. Inner diameter 100 generally approaches the inner diameter of the packer element assembly. As is apparent from the drawings, outer surface 94 faces outwardly away from the tool.
  • the slope of surface 92 on fin 90 is preferably approximately 45° as shown in FIG. 2. However, the exact slope will be determined by the exterior configuration of the packer element ends that are to be positioned and eventually placed to the contact with retaining shoe 66 and inner surface 92 on fin 90. Inner face 99 of inner shoe 80 is slightly sloped, approximately 5° if desired, but it is also best determined by the surface of the tool which it eventually abuts against when apparatus 10 is centered in the wellbore.
  • a gap 106 is defined by adjacent ends 104 and 102 of segments 96 before or after downhole tool 10 is set in the well.
  • Gap 106 has a width 109 which can be essentially zero when the segments are initially installed about mandrel 28, and before the tool is moved from the set to the unset position. However, a small gap, for example a gap of .06" may be provided for on initial installation.
  • the width 109 of gap 106 will increase from that which exists on initial installation as the tool 10 is set.
  • outer shoe 82 has an inner surface 105 and an outer surface 107.
  • Outer shoe 82 preferably has a plurality of individual shoe segments 108 to form outer shoe 82 which encircles inner shoe 80 and thus encircles mandrel 28.
  • Shoe segments 108 have an inner surface 110, and an outer surface 116.
  • Inner surface 105 of outer shoe 82 defines an inner diameter 112 and thus defines a generally cylindrical surface 114 adapted to engage outer surface of body 88 on inner shoe 80.
  • Inner surface 105 likewise defines a truncated conical surface 115 to accommodate the outer surface of fin 90 and thus transitions from a greater radius proximate external, or outer surface 107 to the inner diameter 112.
  • Ends 118 and 120 of segments 108 are flat and convergent with respect to a center reference point, which if the shoe segments are installed about a mandrel, corresponds to the longitudinal axial centerline such as longitudinal central axis 40 of mandrel 28. End surfaces 118 and 120 need not be flat and can be of other topology.
  • FIG. 6 illustrates outer shoe 82 being made of a total of eight shoe segments to provide a 360° annulus, or encircling structure to provide the maximum amount of end support.
  • a lesser or greater amount of shoe segments can be used depending upon the nominal diameters of the mandrel, the packer elements in the wellbore or casing in which the tool is to be deployed.
  • a base 121 of outer shoe 82 is slightly sloped, approximately 5°, if desired but is also best determined by the surface of the tool which the shoe will eventually abut against, as for example in this case, the slip wedges 52 and 72.
  • An O-ring 122 is received in a groove 124 in outer shoe 82.
  • Retaining bands 126 are received in grooves 127 to initially hold the segments in place prior to actually setting the tool 10.
  • Gap 128 is a space between adjacent ends 118 and 120 of segments 108 before or after the tool 10 is set.
  • Gap 128 has a width 129 that can be essentially zero when the segments are initially installed about tool 10, but a small gap, such as .06" may exist after initial installation. The gap will increase in width when the apparatus 10 is set.
  • Retaining bands 126 are preferably made of a non-metallic material, such as composite materials available from General Plastics & Rubber Company, Inc., 5727 Ledbetter, Houston, Texas 77087-4095.
  • shoe retaining bands 126 may be alternatively made of a metallic material such as ANSI 1018 steel or any other material having sufficient strength to support and retain the shoes in position prior to actually setting a tool employing such bands. Furthermore, retaining bands 126 may have either elastic or non-elastic qualities depending on how much radial, and to some extent axial, movement of the shoe segments can be tolerated prior to enduring the deployment of the associated tool into a wellbore. Referring now to FIGS. 1 and 2, apparatus 10 is shown in its unset position 11 and thus the packer element assembly 56 is in its unset position 57. FIG. 3 shows the set position 13 of the tool 10 and the corresponding set position 59 of the packer element assembly 56.
  • retaining bands 126 serve to hold segments 108 in place, and thus also hold segments 96 in place.
  • inner shoe 80 engages mandrel 28 about the upper and lower ends of the packer element assembly 56.
  • Inner shoe 80 of the lower retaining shoe engages lower end 62 of packer element assembly 56 and inner shoe 80 of the upper retaining shoe 68 engages the upper end 60 of packer element assembly 56 in the unset position of tool and the packer element assembly.
  • setting tools as commonly known in the art will move the tool 10 and thus the packer element assembly 56 to their set positions as shown in FIG. 3.
  • inner shoe segments 96 are positioned so that gaps 106 which, as described before, may be zero when initially installed but may also be slightly greater than zero, will be located between the ends 118 and 120 of outer shoe segments 108. Likewise, gaps 128 between ends 118 and 120 of the outer shoe segments 108 will be positioned between the ends 102 and 104 of inner shoe segments 96. Gaps 106 are thus offset angularly from gaps 128. Gaps 128 are thus covered by segments 96, and gaps 106 are covered by segments 108.
  • the width 109 of each of gaps 106 and the width 129 of gaps 128, will be essentially uniform, or will vary only slightly as the retaining shoe 66 moves radially outwardly to its expanded position.
  • the inner shoe in the embodiment described herein has a fin and a body
  • the body portion may be eliminated so that the inner face of the outer shoe will extend so that it engages the outer surface of the mandrel in the unset position.
  • the inner shoe may comprise only the wing portion so that it will engage the upper and lower ends of the packer element assembly.
  • a retaining shoe 150 may be disposed about mandrel 28 and may include a first or inner shoe 152 and a second or outer shoe 154.
  • Inner shoe 152 is generally identical in all aspects to inner shoe 80, except that it does not include a body 88.
  • Outer shoe 154 likewise is similar to outer shoe 82.
  • outer shoe 154 will engage mandrel 28 in the unset position of the tool.
  • Inner shoe 152 and outer shoe 154 are comprised of a plurality of segments that will have gaps therebetween when retaining shoe 150 expands radially outwardly to engage a casing in the well.
  • the segments are positioned so that the gaps between segments in inner shoe 152 are covered by the segments that make up outer shoe 154.
  • the gaps between segments in outer shoe 154 will be covered by the segments that comprise inner shoe 152.
  • retaining shoe 150 will prevent, or at least limit, the extrusion of the packer element assembly when it is in the set position.
EP20020255754 2001-08-20 2002-08-19 Sabot de retenue expansible Expired - Fee Related EP1286019B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93404501A 2001-08-20 2001-08-20
US934045 2001-08-20

Publications (2)

Publication Number Publication Date
EP1286019A1 true EP1286019A1 (fr) 2003-02-26
EP1286019B1 EP1286019B1 (fr) 2009-04-22

Family

ID=25464867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020255754 Expired - Fee Related EP1286019B1 (fr) 2001-08-20 2002-08-19 Sabot de retenue expansible

Country Status (3)

Country Link
EP (1) EP1286019B1 (fr)
CA (1) CA2396242C (fr)
DE (1) DE60232046D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008032045A1 (fr) * 2006-09-13 2008-03-20 Halliburton Energy Services, Inc. Système de retenue d'élément de garniture étanche
WO2009074785A2 (fr) * 2007-12-11 2009-06-18 Rubberatkins Limited Outil d'étanchéification

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2013362802A1 (en) 2012-12-21 2015-07-09 Resource Completion Systems Inc. Multi-stage well isolation

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368928A (en) * 1942-03-16 1945-02-06 Baker Oil Tools Inc Packing device
US4151875A (en) 1977-12-12 1979-05-01 Halliburton Company EZ disposal packer
US5224540A (en) 1990-04-26 1993-07-06 Halliburton Company Downhole tool apparatus with non-metallic components and methods of drilling thereof
US5271468A (en) 1990-04-26 1993-12-21 Halliburton Company Downhole tool apparatus with non-metallic components and methods of drilling thereof
US5390737A (en) 1990-04-26 1995-02-21 Halliburton Company Downhole tool with sliding valve
US5540279A (en) 1995-05-16 1996-07-30 Halliburton Company Downhole tool apparatus with non-metallic packer element retaining shoes
US5701959A (en) 1996-03-29 1997-12-30 Halliburton Company Downhole tool apparatus and method of limiting packer element extrusion
US6167963B1 (en) * 1998-05-08 2001-01-02 Baker Hughes Incorporated Removable non-metallic bridge plug or packer
EP1197632A2 (fr) * 2000-10-12 2002-04-17 Greene, Tweed Of Delaware, Inc. Rondelle anti extrusion

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368928A (en) * 1942-03-16 1945-02-06 Baker Oil Tools Inc Packing device
US4151875A (en) 1977-12-12 1979-05-01 Halliburton Company EZ disposal packer
US5224540A (en) 1990-04-26 1993-07-06 Halliburton Company Downhole tool apparatus with non-metallic components and methods of drilling thereof
US5271468A (en) 1990-04-26 1993-12-21 Halliburton Company Downhole tool apparatus with non-metallic components and methods of drilling thereof
US5390737A (en) 1990-04-26 1995-02-21 Halliburton Company Downhole tool with sliding valve
US5540279A (en) 1995-05-16 1996-07-30 Halliburton Company Downhole tool apparatus with non-metallic packer element retaining shoes
US5701959A (en) 1996-03-29 1997-12-30 Halliburton Company Downhole tool apparatus and method of limiting packer element extrusion
US6167963B1 (en) * 1998-05-08 2001-01-02 Baker Hughes Incorporated Removable non-metallic bridge plug or packer
EP1197632A2 (fr) * 2000-10-12 2002-04-17 Greene, Tweed Of Delaware, Inc. Rondelle anti extrusion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008032045A1 (fr) * 2006-09-13 2008-03-20 Halliburton Energy Services, Inc. Système de retenue d'élément de garniture étanche
WO2009074785A2 (fr) * 2007-12-11 2009-06-18 Rubberatkins Limited Outil d'étanchéification
WO2009074785A3 (fr) * 2007-12-11 2010-01-07 Rubberatkins Limited Outil d'étanchéification

Also Published As

Publication number Publication date
EP1286019B1 (fr) 2009-04-22
DE60232046D1 (de) 2009-06-04
CA2396242C (fr) 2008-10-07
CA2396242A1 (fr) 2003-02-20

Similar Documents

Publication Publication Date Title
US6695051B2 (en) Expandable retaining shoe
US6695050B2 (en) Expandable retaining shoe
EP0743422B1 (fr) Ensemble d'étanchéité pour fond de trou
US5701959A (en) Downhole tool apparatus and method of limiting packer element extrusion
EP0890706B1 (fr) Système de retenue pour un coin de retenue pour des outils de puits
CA2662406C (fr) Systeme de retenue d'element de garniture etanche
EP2313606B1 (fr) Outil de fond de trou avec bague de maintien en matériaux multiples
EP2221447B1 (fr) Segments de retenue pour outil de fonds de puits
EP1172521B1 (fr) Garniture d'étanchéité de puits avec clapet à bille captive
EP0928878B1 (fr) Coins de retenue pour ancrer un outil de fond de puits
US20090038790A1 (en) Downhole tool with slip elements having a friction surface
US9133681B2 (en) Protected retaining bands
US9080417B2 (en) Drillable tool back up shoe
EP1286019B1 (fr) Sabot de retenue expansible

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030303

AKX Designation fees paid

Designated state(s): DE FR GB NL

17Q First examination report despatched

Effective date: 20070523

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60232046

Country of ref document: DE

Date of ref document: 20090604

Kind code of ref document: P

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090422

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100125

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100302

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20150728

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160819