WO2015017212A1 - Rolled tubular centralizer - Google Patents
Rolled tubular centralizer Download PDFInfo
- Publication number
- WO2015017212A1 WO2015017212A1 PCT/US2014/047837 US2014047837W WO2015017212A1 WO 2015017212 A1 WO2015017212 A1 WO 2015017212A1 US 2014047837 W US2014047837 W US 2014047837W WO 2015017212 A1 WO2015017212 A1 WO 2015017212A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seam
- ribs
- tubular
- centralizer
- sides
- Prior art date
Links
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 241000937413 Axia Species 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 91
- 239000004593 Epoxy Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
- B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
- E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/122—Making tubes or metal hoses with helically arranged seams with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
Definitions
- Embodiments of the present invention generally relate to methods and apparatuses a downboie operation. More particularly, the invention relates to methods and apparatuses for centralization in we!lbores or tubulars.
- tubular which may be drill pipe, casing, production pipe, or screens
- tubular By keeping the tubular generally centered in the well a substantially uniform annular area between the wellbore wall and the tubular is maintained.
- centralization to provide a substantially uniform annular area is imperative.
- the cement is better able to fill ail voids between the tubular and the well thereby forming a better bond with both the wellbore wall and the tubular.
- a common type of centraiizer is a bow spring centraiizer.
- a bow spring centraiizer typically includes a number of bows attached to a collar on the upper end of the bow and on the lower end of the bow. The bow typically curves radially outward between the two collars, in its simplest form the bow spring centraiizer slides over a tubular joint and is restricted only by the tubular couplings at either end of the tubular joint. In some situations, when the bow spring centraiizer is pushed into a wellbore on a tubular string the leading collar may be stopped by a restriction that will cause the bows to longitudinally compress thereby radially expanding the bows radially outwards ultimately causing the bow to .fail as the tubular string continues to move down into the well.
- a centralizer is fabricated wherein a planar material having an upper end, a lower end, a first side, and a second side is formed into a tubular such that the planar material first side contacts the planar material second side.
- the planar material first side may be linked with the planar material second side.
- An elongated opening is then created in the tubular.
- the tubular has a long axis and the opening has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar material lower end.
- the opening does not have any corners and may be an oval, or a rectangle.
- the rectangle has rounded corners.
- the opening long axis is parallel to the long axis of the tubular although in some cases the opening long axis is not parallel to the long axis of the tubular.
- the planar material first side is linked to the planar material second side by welding.
- a plana material having an upper end, a lower end, a first side, and a second side may be formed into a tubular such that the planar material first side contacts the planar material second side.
- the planar material first side is linked with the planar material second side.
- a number of elongated openings are then created in the tubular.
- the tubular has a long axis and each of the plurality of openings has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar materia! lower end.
- planar material is rolled into a cylinder where the rolling is parallel to one side in some instances the planar material may be rolled into a cylinder by spiral winding process where the rolling is not parallel to either side. In such instances a long tubular may be formed without stopping.
- the plurality of openings do not have comers. While usually the plurality of openings are ovals the openings may be rectangles although in most instances the rectangles have rounded corners.
- the plurality of openings long axis are parallel to the long axis of the tubular although in some cases the plurality of openings PATENT Attorney Docket No. 0186.002.8-PCT long axis are not parallel to the long axis of the tubular.
- first side is linked to the planar material second side by welding.
- the openings are created within the tubular structure that was' fonned from the planar material.
- the material in the tubular structure both above and below the openings define circumferential collars.
- the material in the tubular structure between, the openings define ribs that are disposed between the upper collar and lower collar.
- the ribs are expanded radially outward where the expansion process typically, but not always, plastically deforms the ribs.
- the ribs and in many instances the entire centralizer may be heat-treated, hardened, cured, or any other process known to one skilled in. the art to allow the ribs to elasticaOy deflect after the ribs are expanded.
- the ribs or the entire centralizer may be heat-treated, hardened, cured, or any other process known to one skilled in the art,
- a first planar material having an upper end and a lower end, a first side, and a second side and at least a second planar material having an upper end, a lower end, a first side,, and a second side may be formed into a tubular such that the first planar material first side contacts second planar material second side and the first planar material second side contacts the at least second planar material first side.
- the first planar material first side may be linked with the at least second planar material second side and the first planar material second side may he linked with the second planar material first side.
- a number of elongated openings are then created in the tubular.
- the tubular has a long axis and each of the plurality of openings has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar material lower end.
- the planar material is rolled into a cylinder where the roiling is parailei to one side in some instances the planar material may be rolled into a cylinder by spiral winding process where the rolling is not parallel to either side. In such instances a long tubular may be formed without stopping.
- the plurality of openings do not have corners. While usually the plurality of openings are ovals the openings may be rectangles although in most instances the rectangles have rounded comers.
- the plurality of openings long axis are parallel to the long axis of the tubular although in some cases the plurality of openings long axis are not parallel to the long axis of the tubular.
- the planar material first side is linked to the planar material second side by welding. In most instances the openings are created within the tubular structure that was formed from the planar material.
- the material in the tubular structure both above and below the openings define circumferential collars.
- the material in the tubular structure between the openings define ribs that are disposed between the upper PATENT Attorney Docket No. 01 86.0028-PCT collar and lower collar.
- the ribs are expanded radially outward where the expansion process typically, but not always, plastically defomis the ribs.
- the ribs may be heai-ireaied, .hardened, cured, or any other process known to one skilled in the art before or after the expansion or forming of the ribs.
- Figure ⁇ depicts a generally fiat materia] .
- Figure 2 depicts the generally flat material roiled into a tubular
- Figure 3 depicts a first and a second generally flat material each formed into a portion of the tubular.
- Figure 4 depicts the first and the second generally flat piece of material each formed into a portion of the tube of figure 3 linked together.
- Figure 5 depicts a generally flat piece of materia! having a length substantially greater than its width.
- Figure 6 depicts the generally flat piece of material of figure 5 formed into a tubular by spiral winding.
- Figure 7 depicts a generally flat piece of material having a nonlinear first side and a mirrored nonlinear second side.
- Figure 8 depicts the generally Oat piece of material of figure 7 roiled into a tubular so that the nonlinear first side and mirrored nonlinear second side mate together.
- Figure 9 depicts a roiled tubular with openings created therein thai are parallel to the long axis of the tubular.
- Figure 10 depicts a rolled tubular with openings created therein that are not parallel to the long axis of the tubular.
- Figure 11 depicts a roiled tubular where the first side and second side are partially linked.
- Figure 12 depicts the rolled tubular of figure 11 where at least one opening is created across the unlinked, portions between the first side and second side.
- PATENT Attorney Docket No. 0186.0028-PCT PATENT Attorney Docket No. 0186.0028-PCT
- FIG. 1 depicts a rolled tubular having ribs that have been radially expanded.
- FIG. 1 depicts a generally flat material 10 having an upper end 12. a lower end 14, a first side 18 and a second side 16.
- the process of forming a tubular begins with the generally flat material 10 where the generally flat material 10 does not have any openings or notches in the .materia!.
- the generally flat material 10 may be rolled by a plate roll, may be hydraulic-ally formed, hydro- dynamically formed, stamped, or any other process known for forming flat material into a roll.
- the generally flat material 10 will typically be a steel or other ferrous material, any materia! may be used including most metals, plastics, or fiber reinforced materials such as carbon fiber polymers and. epoxies,
- Figure 2 depicts the generally flat material .10 from Figure .1 after the generally flat material 10 has been rolled into a tubular 20 so that the first side 18 and the second side 16 are in contact with one another along their length.
- the sides 16 and 18 may be linked, in some instance the sides 16 and 18 may be linked one to the other by welding, crimping, pinning, gluing, epoxy or any other linking process known in the industry.
- FIG. 3 depicts a first curved piece of material 30 and a second curved piece of material 40 that were formed from two pieces of generally flat material.
- the first curved piece of materia! 30 has an upper end 32, a lower end 34, a first side 36, and a second side 38.
- the second curved piece of material 40 has an upper end 42, a !ower end 44, a first side 46, and the second side 48.
- FIG. 10271 Figure depicts the curved pieces of material 30 and 40 respectively that have been aligned such that the first side 36 of the first curved piece of material 30 and the second side 48 of the second curved piece of material 40 are in contact with one another along their length while the second side 38 of the first curved piece of material 30 and the first side 46 of the second curved piece of material 40 are also In contact with one another along their length.
- the first curved piece of material 30 and the second curved piece of materia! 40 in PATENT Attorney Docket No. 0186.0028-PCT contact with one another, the curved pieces of material may be linked together to form a tubular 50.
- a generally flat material may be spiral wound such that its first side and the second side come into contact with one another.
- Figure 5 depicts an elongated piece of generally flat material 60 where a length 63 is substantially greater than a width 61.
- the generally flat material 60 has an upper end 62, a lower end 68, a first side 64, and the second side 66.
- the generally fiat material 60 has been formed into a tubular 70.
- the generally flat material 60 was rolled or otherwise formed into the tubular- 70 at an angle that was not parallel to the upper end 62, the lower end 68, the first side 64, or the second side 66.
- the tubular 70 may be curved by a spiral winding process such that the first side 64 and the second side 66 may be linked to one another.
- a generally flat material 80 has an upper end 82, a Sower end 84, a first side 88, and a second side 86 where the first side 88 and the second side 86 are nonlinear reflections of one another.
- Figure 8 depicts the generally flat material 80 from figure 7 after the generally flat material 80 has been formed into a tubular 90 so that the first side 88 and the second side 86 are in contact with one another along their length. With the first side 88 in the second side 86 in contact with one another the two sides 86 and 88 may be linked to form a nonlinear seam between the sides 86 and 88. in those instances where the sides 86 and 88 are nonlinear reflections of one another the two sides may take any form such as a smooth curve, a jagged curve, zig-zags, or any other form.
- Figure 9 depicts the tubular 20 of figure 2 where the first and the second sides 16 and 18 are linked together and with openings 102 created through the tubular 20.
- the long axis of the tubular 20 is parallel to the seam created by linking first and second sides 16 and 18 although in some cases such as when the tubular is formed by spiral winding the seam will not be parallel to the long axis of the tubular.
- Each opening 102 has an upper end 104, a lower end 106, and a long axis 108 where the long axis 108 is generally parallel to the long axis of the tubular 20.
- Ribs 112 are created by the material of the tubular 20 that remains between the openings 102 after the openings 102 are created in the tubular 20.
- a first collar 114 and a second collar 1 16 are created by the material of the tubular 20 that remains above the upper end 104 of the openings 102 and below the l ower end 106 of the openings 102 after the openings 102 are created in the tubular 20.
- the ribs 1 12 are created from the tubular 20 thereby eliminating the potential stress point such as when the ribs in the prior art are welded onto their collars.
- the openings 102 are created preferably as ovals to minimize stress PATENT Attorney Docket No.
- the openings 122 may be formed through the tubular 50, 70, and 90 in a similar manner,
- each rib 1 12 will have the ability to plastically deform when subjected to sufficient side load.
- the centraiizer will act like a rigid type central izer that lias the ability to give when inserted through a tight restriction.
- each rib 112 will have spring-like properties and the centraiizer will act as a bow type centraiizer,
- Figure 10 depicts a tubular 120 having an upper end 121, a lower end 123, and openings 122 created through the tubular 120.
- Each opening 122 has an upper end 124, a lower end 126, and a long axis 128 where the long axis 128 is generally not parallel to the long axis of the tubular 120.
- Ribs 132 are created by the material of the tubular 120 that remains between the openings 122 after the openings 122 are created in the tubular 120.
- a first collar 134 and the second collar 136 are created by the material of the tubular 120 that remains above the upper end 124 of the openings 122 and below the lower end 126 of the openings 122 after the openings 122 are created in the tubular 120.
- the openings 122 may be formed through the tubular 20, 70, and 90 in a similar manner,
- Figure 1 1 depicts the generally flat material 10 from Figure 1 after the generally flat material .10 has been roiled into the tubular 20 so that the first side 1 8 and the second side 16 are in contact with one another along their length. With the first side 8 and the second side 16 in contact with one another a portion of the two sides 16 and 1 8 may be linked. For instance the two sides may be linked along the contact portion of the two sides 18 and 16 from the upper end 12 to any desired point such as point 19 and from the lower end 14 to any desired point such as point 17 leaving the contact portion of the two sides between point 19 and point 17 unlinked.
- Figure 12 depicts the tubular 20 from figure 1 1 having the upper end 12, the lower end 14, and at least one opening 150 created through the tubular 20.
- the material between the upper end 152 and the lower end 154 of the tubular where the first side 18 and second side 16 are adjacent, whether linked o not, is removed.
- the upper end 152 of the opening 150 may be located a point 19, between point 19 and the upper end 12 of the tubular 20, or between points 19 and 17,
- the PATENT Attorney Docket No. 0186.0028-PCT lower end 154 of the opening 150 may be located at point 17, between point 17 and the lower end 14 of the tubular 20, or between points 17 and 19.
- Ribs 160 are created by the material of the tubular 20 that, remains between the openings 150 after the openings 150 are created in the tubular 20.
- a first collar .162 and the second collar 164 are created by the material of the tubular 20 that remains above the upper end 152. of the openings 150 and below the lower end 154 of the openings 150 after the openings 150 are created in the tubular 20. While only the tubular with linear sides is depicted any created tubular may be used.
- the opening 150 may be formed through tubular 50 in a similar manner,
- Figure 13 depicts a tubular 140 having an upper end 142, a lower end 144, openings 146, ribs 148, opening upper end 152, opening lower end 154, and upper coilar 156, and a lower collar 158.
- the ribs 148 have been expanded radially outward so that each of the ribs 148 will have at least one portion, an apex 161 of each of the ribs 148 that extends further radially outward than other portions of each the ribs 148 or of the tubular 140. So that a portion of each of the ribs 348, typically the apex 161 of each rib 148, will contact the wellbore o other tubular wall (not shown).
- each of the ribs 148 will be treated to enhance the ability of each of the ribs 148 to elastically deform. Any treatment process such as heat, treating, cold treating, curing, or any other process known in the industry may be used to enhance the ability each of the ribs 148 to elastically deform.
- the tubular 140 i.e. a centralizer
- the tubular 140 as depicted in figure 13 is placed on a separate tubular so that the collar 158, collar 156, and ribs 148 are generally coaxial with the separate tubular and that each collar 158 and 156 has a reasonably tight fit on the separate tubular.
- the centralizer may be allowed to slide up or down the separate tubular within the limits of couplings that are typically attached at either end of the separate tubular although more preferably at least one of the collars 158 or 156 are attached to the separate tubular.
- Collars 158 or 1.56 may be attached to the separate tubular by any attachment system known in the industry.
- the collars 158 or 156 may be attached to the separate tubular as disclosed by US patent applications 1 1/749544, 12/042989, 12/756173, 13/019084, 13/476807, and .12/913495 which are each incorporated by reference herein.
- the tubular 20, 50, 70, 80. or 90 placed on a separate tubular so that the collars and the ribs may be generall coaxial with the separate tubular.
- the tubular 20, 50, 70, 80, or 90 ma be a centralizer in a similar manner as described in relation to Figure 1 .
- Bottom, lower, or downward denotes the end of the well or device away from the surface, including movement away from the surface.
- Top. upwards, raised, or higher denotes the end of the well or the device toward the surface, including movement towards the PATENT Attorney Docket No. 01 86.0028-PCT surface.
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- Mechanical Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
A method of forming a centralizer where a flat plate is created into a tubular where the flat plate is typically rolled so that two sides of the plate contact one another and are then linked, typically by welding. Openings are then created in the tubular such that there are no comers or other points that stress cracks may originate. Once the openings are created the remaining material between adjacent openings forms ribs. The openings created in the tubular are generally aligned with the long axis of the tubular. The material, at the upper and lower end of the flat plate where openings were not created serve as circumferential collars. The ribs may be radially outwardly expanded in order to provide adequate stand-off. In many instances the ribs will also be hardened by heat treating or other hardening processes.
Description
PATENT Attorney Docket No, 0186.0028-PCT
ROLLED TUBULAR CENTRAUZER
Cross-Reference to Related Application
[0001] This application is a continuation of to U.S. Patent Application Serial No. 13/957.016, filed on August 1 , 2013, which is a continuation-in-part of U.S. Patent Application Serial No, 13/1 1 ,074, fded on July 26, 201 1. The entirety of both of these applications is incorporated herein by reference.
Field Of Invention
{0002} Embodiments of the present invention generally relate to methods and apparatuses a downboie operation. More particularly, the invention relates to methods and apparatuses for centralization in we!lbores or tubulars.
Background
[0603] n the course of drilling and producing oil and gas wells, it has been found be beneficial to keep the tubular, which may be drill pipe, casing, production pipe, or screens, generally centered in the well. In certain instances it may be desirable to center one tubular within another. By keeping the tubular generally centered in the well a substantially uniform annular area between the wellbore wall and the tubular is maintained. In certain instances, such as cementing the tubular into the well, centralization to provide a substantially uniform annular area is imperative. By having a substantially uniform annular area the cement is better able to fill ail voids between the tubular and the well thereby forming a better bond with both the wellbore wall and the tubular.
[0004} A common type of centraiizer is a bow spring centraiizer. A bow spring centraiizer typically includes a number of bows attached to a collar on the upper end of the bow and on the lower end of the bow. The bow typically curves radially outward between the two collars, in its simplest form the bow spring centraiizer slides over a tubular joint and is restricted only by the tubular couplings at either end of the tubular joint In some situations, when the bow spring centraiizer is pushed into a wellbore on a tubular string the leading collar may be stopped by a restriction that will cause the bows to longitudinally compress thereby radially expanding the bows radially outwards ultimately causing the bow to .fail as the tubular string continues to move down into the well. The problem is compounded due to the thickness of the bow spring centralizer's collars and ribs. Usually the collars and the ribs had the same thickness however the thickness of the centraiizer as a whole centraiizer was effectively
PATENT Attorney Docket No, 0186.0028-PCT doubled because the ribs were welded on top of the collar. In the event that a rib was welded edge to edge to the collar a generally weaker collar to rib interface is created and stress points are created by both the welding process and the remaining corners or other sharp points,
[0005] One solution has been to attach at least one of the collars of the bow spring centralizer so that the centralizer will be pulled into the welibore rather than pushed into the wel!bore.
Summary
{0006] In order to minimize any potential stress points created by either welding or by having any sharp points or corners, it was envisioned that a centralizer is fabricated wherein a planar material having an upper end, a lower end, a first side, and a second side is formed into a tubular such that the planar material first side contacts the planar material second side. The planar material first side may be linked with the planar material second side. An elongated opening is then created in the tubular. The tubular has a long axis and the opening has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar material lower end. Typically the opening does not have any corners and may be an oval, or a rectangle. Preferably the rectangle has rounded corners. In most instances the opening long axis is parallel to the long axis of the tubular although in some cases the opening long axis is not parallel to the long axis of the tubular. Typically the planar material first side is linked to the planar material second side by welding.
[0007] in another embodiment of fabricating a centralizer, a plana material having an upper end, a lower end, a first side, and a second side may be formed into a tubular such that the planar material first side contacts the planar material second side. The planar material first side is linked with the planar material second side. A number of elongated openings are then created in the tubular. The tubular has a long axis and each of the plurality of openings has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar materia! lower end. While usually the planar material is rolled into a cylinder where the rolling is parallel to one side in some instances the planar material may be rolled into a cylinder by spiral winding process where the rolling is not parallel to either side. In such instances a long tubular may be formed without stopping. Typically the plurality of openings do not have comers. While usually the plurality of openings are ovals the openings may be rectangles although in most instances the rectangles have rounded corners. Typically the plurality of openings long axis are parallel to the long axis of the tubular although in some cases the plurality of openings
PATENT Attorney Docket No. 0186.002.8-PCT long axis are not parallel to the long axis of the tubular. Usually the planar materia! first side is linked to the planar material second side by welding. In most instances the openings are created within the tubular structure that was' fonned from the planar material. The material in the tubular structure both above and below the openings define circumferential collars. The material in the tubular structure between, the openings define ribs that are disposed between the upper collar and lower collar. Typically the ribs are expanded radially outward where the expansion process typically, but not always, plastically deforms the ribs. Typically the ribs and in many instances the entire centralizer may be heat-treated, hardened, cured, or any other process known to one skilled in. the art to allow the ribs to elasticaOy deflect after the ribs are expanded. However, in certain instances the ribs or the entire centralizer may be heat-treated, hardened, cured, or any other process known to one skilled in the art,
£0008) In another embodiment of fabricating a centralizer a first planar material having an upper end and a lower end, a first side, and a second side and at least a second planar material having an upper end, a lower end, a first side,, and a second side may be formed into a tubular such that the first planar material first side contacts second planar material second side and the first planar material second side contacts the at least second planar material first side. The first planar material first side may be linked with the at least second planar material second side and the first planar material second side may he linked with the second planar material first side. A number of elongated openings are then created in the tubular. The tubular has a long axis and each of the plurality of openings has a long axis having a first end and a second end such that the opening first end is adjacent the planar material upper end and the opening second end is adjacent the planar material lower end. While usually the planar material is rolled into a cylinder where the roiling is parailei to one side in some instances the planar material may be rolled into a cylinder by spiral winding process where the rolling is not parallel to either side. In such instances a long tubular may be formed without stopping. Typically the plurality of openings do not have corners. While usually the plurality of openings are ovals the openings may be rectangles although in most instances the rectangles have rounded comers. Typically the plurality of openings long axis are parallel to the long axis of the tubular although in some cases the plurality of openings long axis are not parallel to the long axis of the tubular. Usually the planar material first side is linked to the planar material second side by welding. In most instances the openings are created within the tubular structure that was formed from the planar material. The material in the tubular structure both above and below the openings define circumferential collars. The material in the tubular structure between the openings define ribs that are disposed between the upper
PATENT Attorney Docket No. 01 86.0028-PCT collar and lower collar. Typically the ribs are expanded radially outward where the expansion process typically, but not always, plastically defomis the ribs. The ribs may be heai-ireaied, .hardened, cured, or any other process known to one skilled in the art before or after the expansion or forming of the ribs.
Brief Description of The Drawings
[0009] So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are tlierefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
[0010] Figure ί depicts a generally fiat materia] .
[0011] Figure 2 depicts the generally flat material roiled into a tubular,
[0012] Figure 3 depicts a first and a second generally flat material each formed into a portion of the tubular.
10013} Figure 4 depicts the first and the second generally flat piece of material each formed into a portion of the tube of figure 3 linked together.
[0014] Figure 5 depicts a generally flat piece of materia! having a length substantially greater than its width.
[00.15] Figure 6 depicts the generally flat piece of material of figure 5 formed into a tubular by spiral winding.
[0016] Figure 7 depicts a generally flat piece of material having a nonlinear first side and a mirrored nonlinear second side.
[0017] Figure 8 depicts the generally Oat piece of material of figure 7 roiled into a tubular so that the nonlinear first side and mirrored nonlinear second side mate together.
(0018] Figure 9 depicts a roiled tubular with openings created therein thai are parallel to the long axis of the tubular.
[0019] Figure 10 depicts a rolled tubular with openings created therein that are not parallel to the long axis of the tubular.
[0620] Figure 11 depicts a roiled tubular where the first side and second side are partially linked.
[0021] Figure 12 depicts the rolled tubular of figure 11 where at least one opening is created across the unlinked, portions between the first side and second side.
PATENT Attorney Docket No. 0186.0028-PCT
[O022J Figure I 3 depicts a rolled tubular having ribs that have been radially expanded. .Detailed Description
(0023] The description that follows includes exemplary apparatus, methods, techniques, and instruction sequences that embod techniques of the inventive subject matter,
fO©24J Figure 1 depicts a generally flat material 10 having an upper end 12. a lower end 14, a first side 18 and a second side 16. Typically the process of forming a tubular begins with the generally flat material 10 where the generally flat material 10 does not have any openings or notches in the .materia!. When forming the generally flat material 10 into the tubular, the generally flat material 10 may be rolled by a plate roll, may be hydraulic-ally formed, hydro- dynamically formed, stamped, or any other process known for forming flat material into a roll. Whi!e it is anticipated that the generally flat material 10 will typically be a steel or other ferrous material, any materia! may be used including most metals, plastics, or fiber reinforced materials such as carbon fiber polymers and. epoxies,
[0025] Figure 2 depicts the generally flat material .10 from Figure .1 after the generally flat material 10 has been rolled into a tubular 20 so that the first side 18 and the second side 16 are in contact with one another along their length. With the first side 18 in the second side 16 in contact with one another the sides 16 and 18 may be linked, in some instance the sides 16 and 18 may be linked one to the other by welding, crimping, pinning, gluing, epoxy or any other linking process known in the industry.
[0026] in some instances multiple generally flat materials may each be partially formed into a tubular such that when their sides come into contact with one another and are linked to multiple generally flat materials will form the tubular. Figure 3 depicts a first curved piece of material 30 and a second curved piece of material 40 that were formed from two pieces of generally flat material. In this instance, the first curved piece of materia! 30 has an upper end 32, a lower end 34, a first side 36, and a second side 38. The second curved piece of material 40 has an upper end 42, a !ower end 44, a first side 46, and the second side 48.
[00271 Figure depicts the curved pieces of material 30 and 40 respectively that have been aligned such that the first side 36 of the first curved piece of material 30 and the second side 48 of the second curved piece of material 40 are in contact with one another along their length while the second side 38 of the first curved piece of material 30 and the first side 46 of the second curved piece of material 40 are also In contact with one another along their length. With the first curved piece of material 30 and the second curved piece of materia! 40 in
PATENT Attorney Docket No. 0186.0028-PCT contact with one another, the curved pieces of material may be linked together to form a tubular 50.
[0028] in other instances a generally flat material may be spiral wound such that its first side and the second side come into contact with one another. Figure 5 depicts an elongated piece of generally flat material 60 where a length 63 is substantially greater than a width 61. The generally flat material 60 has an upper end 62, a lower end 68, a first side 64, and the second side 66. As depicted in figure 6, the generally fiat material 60 has been formed into a tubular 70. The generally flat material 60 was rolled or otherwise formed into the tubular- 70 at an angle that was not parallel to the upper end 62, the lower end 68, the first side 64, or the second side 66. The tubular 70 may be curved by a spiral winding process such that the first side 64 and the second side 66 may be linked to one another.
[0029] In certain instances, as depicted in figure 7, a generally flat material 80 has an upper end 82, a Sower end 84, a first side 88, and a second side 86 where the first side 88 and the second side 86 are nonlinear reflections of one another. Figure 8 depicts the generally flat material 80 from figure 7 after the generally flat material 80 has been formed into a tubular 90 so that the first side 88 and the second side 86 are in contact with one another along their length. With the first side 88 in the second side 86 in contact with one another the two sides 86 and 88 may be linked to form a nonlinear seam between the sides 86 and 88. in those instances where the sides 86 and 88 are nonlinear reflections of one another the two sides may take any form such as a smooth curve, a jagged curve, zig-zags, or any other form.
[0030] Figure 9 depicts the tubular 20 of figure 2 where the first and the second sides 16 and 18 are linked together and with openings 102 created through the tubular 20. Generally the long axis of the tubular 20 is parallel to the seam created by linking first and second sides 16 and 18 although in some cases such as when the tubular is formed by spiral winding the seam will not be parallel to the long axis of the tubular. Each opening 102 has an upper end 104, a lower end 106, and a long axis 108 where the long axis 108 is generally parallel to the long axis of the tubular 20. Ribs 112 are created by the material of the tubular 20 that remains between the openings 102 after the openings 102 are created in the tubular 20. A first collar 114 and a second collar 1 16 are created by the material of the tubular 20 that remains above the upper end 104 of the openings 102 and below the l ower end 106 of the openings 102 after the openings 102 are created in the tubular 20. To prevent failure in the ribs 1 12 as the ribs 1 12 are being moved downhole, the ribs 1 12 are created from the tubular 20 thereby eliminating the potential stress point such as when the ribs in the prior art are welded onto their collars. Additionally the openings 102 are created preferably as ovals to minimize stress
PATENT Attorney Docket No. 0186.0028-PCT points in the ribs 112 that may remain after the openings 102 are created in the tubular 20 although any shape that avoids sharp corners or points may be used. The openings 122 may be formed through the tubular 50, 70, and 90 in a similar manner,
[003i] in certain instances such as when the material used to form the tubular is thick enough or is not hardened, heat treated, or cured to obtain spring-like properties, each rib 1 12 will have the ability to plastically deform when subjected to sufficient side load. In such cases, the centraiizer will act like a rigid type central izer that lias the ability to give when inserted through a tight restriction. When the material is not as thick as in the case of a rigid centraiizer described above and when the materia! is heat treated, hardened, or cured to provide spring-like properties, each rib 112 will have spring-like properties and the centraiizer will act as a bow type centraiizer,
[0032] Figure 10 depicts a tubular 120 having an upper end 121, a lower end 123, and openings 122 created through the tubular 120. Each opening 122 has an upper end 124, a lower end 126, and a long axis 128 where the long axis 128 is generally not parallel to the long axis of the tubular 120. Ribs 132 are created by the material of the tubular 120 that remains between the openings 122 after the openings 122 are created in the tubular 120. A first collar 134 and the second collar 136 are created by the material of the tubular 120 that remains above the upper end 124 of the openings 122 and below the lower end 126 of the openings 122 after the openings 122 are created in the tubular 120. The openings 122 may be formed through the tubular 20, 70, and 90 in a similar manner,
[0033] Figure 1 1 depicts the generally flat material 10 from Figure 1 after the generally flat material .10 has been roiled into the tubular 20 so that the first side 1 8 and the second side 16 are in contact with one another along their length. With the first side 8 and the second side 16 in contact with one another a portion of the two sides 16 and 1 8 may be linked. For instance the two sides may be linked along the contact portion of the two sides 18 and 16 from the upper end 12 to any desired point such as point 19 and from the lower end 14 to any desired point such as point 17 leaving the contact portion of the two sides between point 19 and point 17 unlinked.
[0034] Figure 12 depicts the tubular 20 from figure 1 1 having the upper end 12, the lower end 14, and at least one opening 150 created through the tubular 20.
[0035] When creating the opening 150 the material between the upper end 152 and the lower end 154 of the tubular where the first side 18 and second side 16 are adjacent, whether linked o not, is removed. The upper end 152 of the opening 150 may be located a point 19, between point 19 and the upper end 12 of the tubular 20, or between points 19 and 17, The
PATENT Attorney Docket No. 0186.0028-PCT lower end 154 of the opening 150 may be located at point 17, between point 17 and the lower end 14 of the tubular 20, or between points 17 and 19. Ribs 160 are created by the material of the tubular 20 that, remains between the openings 150 after the openings 150 are created in the tubular 20. A first collar .162 and the second collar 164 are created by the material of the tubular 20 that remains above the upper end 152. of the openings 150 and below the lower end 154 of the openings 150 after the openings 150 are created in the tubular 20. While only the tubular with linear sides is depicted any created tubular may be used. The opening 150 may be formed through tubular 50 in a similar manner,
[0036] Figure 13 depicts a tubular 140 having an upper end 142, a lower end 144, openings 146, ribs 148, opening upper end 152, opening lower end 154, and upper coilar 156, and a lower collar 158. The ribs 148 have been expanded radially outward so that each of the ribs 148 will have at least one portion, an apex 161 of each of the ribs 148 that extends further radially outward than other portions of each the ribs 148 or of the tubular 140. So that a portion of each of the ribs 348, typically the apex 161 of each rib 148, will contact the wellbore o other tubular wall (not shown). In many instances at least a portion of each of the ribs 148 will be treated to enhance the ability of each of the ribs 148 to elastically deform. Any treatment process such as heat, treating, cold treating, curing, or any other process known in the industry may be used to enhance the ability each of the ribs 148 to elastically deform. f0037] in practice it is generally understood that the tubular 140 (i.e. a centralizer) as depicted in figure 13 is placed on a separate tubular so that the collar 158, collar 156, and ribs 148 are generally coaxial with the separate tubular and that each collar 158 and 156 has a reasonably tight fit on the separate tubular. The centralizer may be allowed to slide up or down the separate tubular within the limits of couplings that are typically attached at either end of the separate tubular although more preferably at least one of the collars 158 or 156 are attached to the separate tubular. Collars 158 or 1.56 may be attached to the separate tubular by any attachment system known in the industry. For instance the collars 158 or 156 may be attached to the separate tubular as disclosed by US patent applications 1 1/749544, 12/042989, 12/756173, 13/019084, 13/476807, and .12/913495 which are each incorporated by reference herein. The tubular 20, 50, 70, 80. or 90 placed on a separate tubular so that the collars and the ribs may be generall coaxial with the separate tubular. The tubular 20, 50, 70, 80, or 90 ma be a centralizer in a similar manner as described in relation to Figure 1 .
[0038] Bottom, lower, or downward denotes the end of the well or device away from the surface, including movement away from the surface. Top. upwards, raised, or higher denotes the end of the well or the device toward the surface, including movement towards the
PATENT Attorney Docket No. 01 86.0028-PCT surface. While the embodiments are described with reference to various implementations and exploitations, it will be understood thai these embodiments are illustrative and that the scope of the inventive subject matter is not limited to them. Many variations, modifications, additions and improvements are possible.
0039J Plural instances may be provided for components, operations or structures described herein as a single instance, in general, structures and functionality presented as separate components in the exemplary configurations may be implemented as a combined structure or component. Similarly, structures and functionality presented as a single component may be implemented as separate components. These and other variations, modifications, additions, and improvements may fall within the scope of the inventive subject matter.
{0040] While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims tha follow.
Claims
1. A method tor manufacturing a centralizer, comprising:
rolling a plate such that first and second sides of the plate are adjacent;
attaching together the first and second sides, such that a seam is formed where the first and second sides are attached together; and
after rolling the plate, removing one or more portions from the plate, such that two or more ribs are defined extending between two or more end collars.
2. The method of claim 1, wh erein removing the one or more portions of the plate occurs after attaching together the first and second sides.
3. The method of claim 1, wherein removing the one or more portions comprises removing at least a portion of the seam.
4. The method of claim 3 , wherein removing the one or more portions comprises forming one or more openings that do not intersect the seam.
5. The method of claim 1, wherein removing the one or more portions comprises forming one or more openings that extend substantially parallel to the seam.
6. The method of claim 5, wherein the seam is defined along one of the two or more ribs,
7. The method of claim 1, wherein removing the one or more portions comprises forming two or more openings between which the two or more ribs are defined, the two or more openings being substantially oval-shaped.
8. The method of claim 1, wherein the seam comprises a non-linear shape selected from the group consisting of: one or more smooth curves, one or more jagged curves, or one or more zig-zag shapes.
9. The method of claim 1 , wherein attaching together the first and second sides
PATENT Attorney Docket No, 0186.0028-PCT comprises welding the first and second sides together, without overlapping.
10. The method of claim 1 , wherein:
rolling the plate comprises spiral winding the plate;
the seam extends along a helical path; and
removing the one or more portions comprises forming one or more openings that intersect the seam at least once.
1 1. The method of claim 1, wherein:
the plate comprises a first plate segment and a second plate segment, the first plate segment providing the first side and the second plate segment providing the second side; and roiling the plate comprises forming each of the first and second plate segments into an arcuate shape.
12. A central izer, comprising:
a tubular body comprising a first side and a second side, the first and second sides extending axiaily along the tubular body, wherein the tubular body defines at least first and second axia'lly-offset end collars and a plurality of ribs extending between the first and second end collars, the plurality of ribs being integral with the first and second end collars; and
a seam connecting the first side and the second side together, wherein the seam is formed along at least a portion of the first end collar and along at least a portion of the second end collar, such that the first and second sides are connected together to form the first and second end collars without overlapping the first and second sides.
13. The centralizer of claim 12, wherein the seam Is circumferential!}' aligned with an opening defined between two of the plurality of ribs.
1 . The centralizer of claim 12, wherein the seam extends parallel to and along an entirety of at least one of the plurality of ribs.
15. The centralizer of claim 12, wherein the plurality of ribs are elongated In an axial direction, and wherein the seam extends at a non-zero angle to the axial direction and is defined on at least one of the plurality of ribs.
PATENT Attorney Docket No. 0186.0028-PCT
16. The centralizer of claim 15, wherein the seam is defined on at least two of the plurality of ribs.
17. The centralizer of claim 15, wherein the seam extends in a partial helix along the body.
18. The centralizer of claim 12, wherein the first arid second sides each define one or more curves.
1 . The centralizer of claim 12, wherein the first and second sides are connected end-to- end without overlap.
20. The centralizer of claim 12, wherein the tubular body further comprises third and fourth sides, and the centralizer further comprises a second seam connecting together the third and fourth sides.
21. A centralizer, comprising:
a first end collar comprising a first seam portion extending axially across the first end collar;
a second end collar that Is axially offset from the first end collar and comprises a second seam portion extending axially across the second end collar; and
a plurality of ribs extending between the first and second end collars and being integral therewith, at least one of the plurality of ribs comprising a third seam portion.
22. The centralizer of claim 21, wherein the first end collar and the second end collar are free from overlapping regions.
23. The centralizer of claim 21 , wherein the first and second seam portions are cireumferentially aligned.
24. The centralizer of claim 2L wherein the first, second, and third seam portions form a continuous seam.
PATENT Attorney Docket No. 0I 86.0028-PCT
25. The eentralizer of claim 21, wherein the plurality of ribs are elongated in an axial direction, and wherein the third seam portion extends at a non-zero angle with respect to the axial direction.
26. The eentralizer of claim 25, wherein the first, second, and third seam portions together extend along a helical path.
27. The eentralizer of claim 21 , wherein at least two o the plurality of ribs defme the third seam porti n.
28. A method for manufacturing a eentralizer, comprising:
rolling a substantially linear plate such that first and second sides of the plate are adjacent;
attaching together the first and second sides, such that a first seam portion, a second seam portion and a third seam portion are formed; and
removing one or more portions from the plate, such that two or more ribs are defined extending between two end collars,
29. The method of claim 28, wherein the first, second, and third seam portions form a continuous seam
30. The method of claim 28, wherein the two end collars include the first and second seam portions, respectively.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14832286.0A EP3027333B1 (en) | 2013-08-01 | 2014-07-23 | Rolled tubular centralizer |
CA2920198A CA2920198C (en) | 2013-08-01 | 2014-07-23 | Rolled tubular centralizer |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/957,016 US9982496B2 (en) | 2011-07-26 | 2013-08-01 | Rolled tubular centralizer |
US13/957,016 | 2013-08-01 | ||
US14/283,947 | 2014-05-21 | ||
US14/283,947 US20140251595A1 (en) | 2011-07-26 | 2014-05-21 | Rolled tubular centralizer |
Publications (2)
Publication Number | Publication Date |
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WO2015017212A1 true WO2015017212A1 (en) | 2015-02-05 |
WO2015017212A8 WO2015017212A8 (en) | 2016-03-24 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US2014/047837 WO2015017212A1 (en) | 2013-08-01 | 2014-07-23 | Rolled tubular centralizer |
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EP (1) | EP3027333B1 (en) |
CA (1) | CA2920198C (en) |
WO (1) | WO2015017212A1 (en) |
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WO2018065230A1 (en) * | 2016-10-05 | 2018-04-12 | Bayerische Motoren Werke Aktiengesellschaft | Method for producing a high strength tube part |
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Also Published As
Publication number | Publication date |
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CA2920198C (en) | 2022-03-15 |
EP3027333B1 (en) | 2018-06-27 |
CA2920198A1 (en) | 2015-02-05 |
WO2015017212A8 (en) | 2016-03-24 |
EP3027333A4 (en) | 2017-04-26 |
EP3027333A1 (en) | 2016-06-08 |
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