EP1777366A1 - Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element - Google Patents

Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element Download PDF

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Publication number
EP1777366A1
EP1777366A1 EP05256528A EP05256528A EP1777366A1 EP 1777366 A1 EP1777366 A1 EP 1777366A1 EP 05256528 A EP05256528 A EP 05256528A EP 05256528 A EP05256528 A EP 05256528A EP 1777366 A1 EP1777366 A1 EP 1777366A1
Authority
EP
European Patent Office
Prior art keywords
tubular element
mandrel
corrugation
annular rim
tubular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05256528A
Other languages
English (en)
French (fr)
Inventor
Wilhelmus Christianus Maria Lohbeck
Robert Bruce Stewart
Robert Nicholas Worrall
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP05256528A priority Critical patent/EP1777366A1/de
Publication of EP1777366A1 publication Critical patent/EP1777366A1/de
Withdrawn legal-status Critical Current

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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/105—Expanding tools specially adapted therefor
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B21D17/025—Forming single grooves in sheet metal or tubular or hollow articles by pressing by pressing tubes axially
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material

Definitions

  • the present invention relates to a method of creating a corrugation in a tubular element. It is known to provide a tubular element with one or more corrugations, such as for the purpose of accommodating thermal expansion or contraction of the tubular element. If, for example, fluid of varying temperature is transported through the tubular element, one or more corrugations in the tubular element may serve to alleviate compressive forces due to thermal expansion by controlled deformation of the corrugations. Also, corrugations can be created in casings or liners extending into wellbores for the production of hydrocarbon fluid to accommodate compaction of the surrounding earth formation or to accommodate thermal expansion during start-up of the wellbore. Furthermore, corrugations generally also increase the collapse resistance of the tubular element.
  • WO 2004/005669 discloses a method and a tool for creating a corrugation in a tubular element.
  • the tool comprises a hollow body having three radially extending apertures which each accommodate a piston, with a roller being mounted on each piston.
  • Each roller has a raised rib that is pressed against the inner surface of the tubular element when the pistons are activated to move radially outward.
  • a corrugation is created in the tubular element by simultaneously activating the pistons and rotating the tool in the tubular element. During rotation of the tool in, the rollers move along the inner surface of the tubular element with a high compressive force between each roller and the tubular element.
  • a method of creating a corrugation in a tubular element comprising inserting an expansion mandrel having an annular rim into the tubular element, the mandrel being radially expandable between a retracted mode in which the annular rim has an outer diameter equal or smaller than the inner diameter of the tubular element, and an expanded mode in which the annular rim has an outer diameter larger than said inner diameter of the tubular element, whereby the mandrel is in the retracted mode during insertion into the tubular element, transporting the mandrel through the tubular element to the location where the corrugation is to be created, and inducing the mandrel to move from the radially retracted mode to the radially expanded mode thereby creating said corrugation in the tubular element.
  • the corrugation is formed by virtue of a substantially uniform pressure exerted by the annular rim to the inner surface of the tubular element. This allows the corrugation to be created in a single stroke of the mandrel from the retracted mode to the expanded mode, thus ensuring that the corrugation has a regular shape and that fatigue of the wall of the tubular element is avoided.
  • the mandrel comprises a tubular body formed of a plurality of segments spaced along the circumference of the tubular body and separated from each other by respective longitudinal slits.
  • each segment has a rim portion, and the rim portions of the respective segments form the annular rim.
  • FIGs. 1 and 2 there is shown an expansion mandrel 1 located in a tubular element 2, the mandrel 1 being movable between a radially retracted mode (Fig. 1) and a radially expanded mode (Fig. 2).
  • the mandrel 1 comprises a steel tubular body 4 including a first body portion 4a, a second body portion 4b, and an expander portion 4c located centrally between the first and second body portions 4a, 4b.
  • the ends of the expander body 4 are closed by respective circular end plates 6, 7 of a diameter slightly smaller than the inner diameter of the tubular body 4.
  • the first body portion 4a tapers radially inward in the direction from end plate 6 towards the expander portion 4c, and the second body portion 4a tapers radially inward from end plate 7 towards the expander portion 4c.
  • the expander portion 4c forms an annular rim 4c protruding radially outward from the first and second body portions 2a, 2b.
  • the annular rim 4c has an outer diameter slightly smaller than the inner diameter of the tubular element 2.
  • the annular rim 4c has an outer diameter significantly larger than the inner diameter of the tubular element 2.
  • the tubular body 4 is provided with a plurality of narrow longitudinal slots 8 regularly.spaced along the circumference of the tubular body 4.
  • the slots 8 do not extend the full length of the tubular body 4, with short un-slotted sections 10, 11 of the tubular body 4 at both ends thereof.
  • the slots 8 pass through the wall of the tubular body 4, thus defining a plurality of separate longitudinal body segments 12 spaced along the circumference of the tubular body 4.
  • the body segments 12 are capable of elastic bending radially outward upon application of a suitable internal pressure applied to the tubular body 4.
  • the body segments 12 are in rest position when the mandrel 1 is in the radially retracted mode (Fig. 1), whereas the body segments 12 are bent radially outward by internal pressure when the mandrel 1 is in the radially expanded mode (Fig. 2).
  • the tubular body 4 is internally provided with an inflatable bladder 14 of elastomeric material, whereby the shape of the bladder 14 substantially corresponds to the shape of the space defined by the inner surface of the tubular body 4 and the end plates 6, 7.
  • the internal space of the bladder 14 forms a fluid chamber 18 that is fluidly connected to a fluid control system (not shown) via a fluid conduit 20 extending through the tubular element 2.
  • Fig. 5 there is shown a detail of the cross-section of the mandrel 1, indicating a tubular layer of relatively stiff elastomer 22 and a plurality of thin (about 0.5 mm thick) steel plates 24 located between the bladder 14 and the body segments 12.
  • the steel plates 24 extend in longitudinal direction of the mandrel 1, with a small longitudinal space inbetween each pair of adjacent plates 24.
  • the plates 24 are twice as wide as the body segments 12.
  • Each plate 24 is fixedly connected to the inner surface of a body segment 12a, for example by means of glue, and extends along the inner surfaces of the two adjacent body segments 12b, 12c in a free sliding manner.
  • the mandrel 1 is inserted into the tubular element 2 in its radially retracted mode, and moved to a location where a corrugation is to be formed in the tubular element 2.
  • Fluid is then pumped from the fluid control system, via the tubular string 20, into the inflatable bladder 14 so as to increase the fluid pressure in the fluid chamber 18.
  • the body segments 12 move radially outward, with the effect that the annular rim 4c radially expands against the wall of the tubular element 2 at high force.
  • a short section of the tubular element 2 thereby becomes plastically deformed to form a corrugation 26 (Fig. 2) of a shape corresponding to the shape of the annular rim 4c.
  • the slots 8 become wider as the mandrel 1 moves to the radially expanded mode.
  • the elastomer layer 22 and the plates 24 serve to prevent the wall of the bladder 14 becoming pressed into the widened slots 8.
  • the fluid control system is operated to release the fluid pressure in the bladder 14 so as to allow the body segments 4 to elastically move back to their respective rest positions. If necessary, the mandrel 1 is then moved to another location in the tubular element 2 to create another corrugation in a similar manner.
  • the corrugations 26 made in this manner have several possible purposes.
  • one possible purpose is to reduce the axial stiffness of the tubular element 2.
  • the corrugation 26 collapses (Fig. 7) if the compressive load exceeds a selected threshold magnitude. It is thereby achieved that the corrugation 26 functions as a mechanical 'fuse' by preventing the tubular element being overloaded.
  • Such axial compressive load is, for example, caused by thermal expansion of the tubular element 2.
  • the tubular element 2 is a casing or a liner extending into a well for the production of oil or gas
  • the axial compressive force can be due to vertical compaction of the surrounding earth formation.
  • the 'fuse' functionality of the corrugation 26 prevents damage to other portions of the tubular element 2 due to overloading.
EP05256528A 2005-10-21 2005-10-21 Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element Withdrawn EP1777366A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05256528A EP1777366A1 (de) 2005-10-21 2005-10-21 Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05256528A EP1777366A1 (de) 2005-10-21 2005-10-21 Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element

Publications (1)

Publication Number Publication Date
EP1777366A1 true EP1777366A1 (de) 2007-04-25

Family

ID=35883563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05256528A Withdrawn EP1777366A1 (de) 2005-10-21 2005-10-21 Verfahren zur Herstellung einer Wellung in einem rohrförmigen Element

Country Status (1)

Country Link
EP (1) EP1777366A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779445A (en) * 1987-09-24 1988-10-25 Foster Wheeler Energy Corporation Sleeve to tube expander device
US5301424A (en) * 1992-11-30 1994-04-12 Westinghouse Electric Corp. Method for hydraulically expanding tubular members
WO2004097170A1 (en) * 2003-04-25 2004-11-11 Shell International Research Maatschappij B.V. Expander system for stepwise expansion of a tubular element

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4779445A (en) * 1987-09-24 1988-10-25 Foster Wheeler Energy Corporation Sleeve to tube expander device
US5301424A (en) * 1992-11-30 1994-04-12 Westinghouse Electric Corp. Method for hydraulically expanding tubular members
WO2004097170A1 (en) * 2003-04-25 2004-11-11 Shell International Research Maatschappij B.V. Expander system for stepwise expansion of a tubular element

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