EP1576254B1 - An assembly for protecting a flexible tube against wear by friction - Google Patents

An assembly for protecting a flexible tube against wear by friction Download PDF

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Publication number
EP1576254B1
EP1576254B1 EP03779586A EP03779586A EP1576254B1 EP 1576254 B1 EP1576254 B1 EP 1576254B1 EP 03779586 A EP03779586 A EP 03779586A EP 03779586 A EP03779586 A EP 03779586A EP 1576254 B1 EP1576254 B1 EP 1576254B1
Authority
EP
European Patent Office
Prior art keywords
flexible tube
trumpet
stiffener
tube
friction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03779586A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1576254A1 (en
Inventor
Roberto Jourdan De Aquino
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.)
Technip Energies France SAS
Original Assignee
Technip France SAS
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 Technip France SAS filed Critical Technip France SAS
Publication of EP1576254A1 publication Critical patent/EP1576254A1/en
Application granted granted Critical
Publication of EP1576254B1 publication Critical patent/EP1576254B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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
    • E21B17/1085—Wear protectors; Blast joints; Hard facing
    • 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
    • E21B17/01—Risers
    • E21B17/017—Bend restrictors for limiting stress on risers
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform

Definitions

  • the present invention relates to an assembly for protecting a flexible tube against wear by friction, particularly for protecting risers, jumpers or umbilicals in contact with stiffeners arranged in I-tubes.
  • flexible tubes are connected to platforms (or tankers FPSOs - FSOs) and, short before reaching the platform, they pass inside a stiffener, which is fixed to a bell mouth of a steel tube, also called I-tube, see for example US 5,526,846 , disclosing all features of the preamble of claim 1.
  • the present invention has the objective of providing a protection for the flexible tube, which considerably increases its useful life, thus avoiding stoppages for maintenance and substantially reducing the expenditures and loss of profits, as well as possible environmental accidents.
  • An antifriction layer may be arranged on the internal wall of the stiffener or on the external wall of the trumpet, while the friction layer may be of a synthetic material.
  • the above-cited flexible tube may be, for example, a riser, a jumper or an umbilical.
  • the assembly for protection against wear by friction according to the invention as a great advantage, enables the flexible tube to have longer useful life than the flexible tubes arranged in I-tubes according to the prior art.
  • Figure 1 shows an I-tube 1, at the end of which a bell mouth 2 may be fixed.
  • An stiffener 3, with a trumpet 4 fixed to its upper end, is partially arranged inside the I-tube 1.
  • a flexible tube 5 passes inside the stiffener 3 and an annular piece 6, which may be, for example, a collar or a retractile ring, is fixed to said flexible tube 5.
  • the stiffener 3 is mounted on the annular piece 6 and, in this way, it remains integral with the flexible tube and may follow all the movements of the latter.
  • the stiffener 3 further presents a centralizer 7, which rests against the internal wall of the I-tube 1 and guides the displacements of the stiffener 3 inside the I-tube 1.
  • the fixation of the stiffener/trumpet to the flexible tube 5 may be effected by means of a split friction collar 6, installed directly in the flexible tube, with or without the use of a centralizer, or may be made by using a retractile ring installed directly in the insert of the stiffener 3 either inside or outside it.
  • Figure 2 shows a second embodiment, where one can see the I-tube 1, which may have a bell mouth 2 at the end.
  • This figure further shows the stiffener 3 with the trumpet 4 inside it and the flexible tube 5 passing inside the stiffener and the trumpet 4.
  • the stiffener 3 is fixed to the I-tube 1 and the trumpet 4 has, on the internal wall, a friction layer 8 that keeps the trumpet integral with the flexible tube 5 by friction.
  • At least two elastic elements 9 arranged between the internal wall of the stiffener 3 and the external wall of the trumpet 4 actuate on an annular shoulder 10 of the trumpet 4 and guarantee the axial movement and the respective return of the trumpet 4.
  • the antifriction layer 11 arranged between the internal wall of the stiffener 3 and the external wall of the trumpet 4.
  • a solution according to the invention may be reached using a removable trumpet.
  • This trumpet 4 may be inserted inside of the stiffener 3.
  • This removable trumpet can be steel covered (lining) with a low friction coefficient material 11, as shown in figures 3 and 4 or be totally constituted with a low friction coefficient material 12 (except the metallic topside split fixing part), as shown in figures 5 and 6 . So, as the split trumpet has at its internal part a low friction material, which will be in contact with the tube outer sheath, the wear will be reduced.
  • the trumpet may be a split trumpet in two part.
  • the split trumpet is removable it can be removed from time to time and inspected in order to observe if the low friction material still have a thickness that wont allow the tube outer sheath wear. But if this thickness is considered reduced, this trumpet could be substituted by a new one. This operation can be done with the tubes already installed offshore without stopping the line work. So the expenses and income losses reducing is great and the wear at the tube outer sheath could be controlled and reduced.
  • topside metallic parts made with bolts that has the function of holding the internal part of the split trumpet and also perform the closure of the split parts.
  • the metallic parts could be painted or protected with any kind of metallic corrosion treatment.
  • the Split Removable Trumpet for Bending Stiffeners can be installed/reinstalled onshore or offshore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Joints Allowing Movement (AREA)
  • Earth Drilling (AREA)
  • Supports For Pipes And Cables (AREA)
EP03779586A 2002-12-18 2003-12-18 An assembly for protecting a flexible tube against wear by friction Expired - Lifetime EP1576254B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BR0205417 2002-12-18
BR0205417A BR0205417B1 (pt) 2002-12-18 2002-12-18 conjunto protetor de um tubo flexìvel contra desgaste por atrito.
PCT/BR2003/000197 WO2004055319A1 (en) 2002-12-18 2003-12-18 An assembly for protecting a flexible tube against wear by friction

Publications (2)

Publication Number Publication Date
EP1576254A1 EP1576254A1 (en) 2005-09-21
EP1576254B1 true EP1576254B1 (en) 2013-02-20

Family

ID=32513922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03779586A Expired - Lifetime EP1576254B1 (en) 2002-12-18 2003-12-18 An assembly for protecting a flexible tube against wear by friction

Country Status (6)

Country Link
EP (1) EP1576254B1 (no)
AU (1) AU2003287790A1 (no)
BR (1) BR0205417B1 (no)
DK (1) DK1576254T3 (no)
NO (1) NO334893B1 (no)
WO (1) WO2004055319A1 (no)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0303446B1 (pt) * 2003-09-03 2014-04-08 Technip France Conjunto de fixação do enrijecedor para conjunto protetor de um tubo flexível contra desgaste por atrito
GB0506406D0 (en) * 2005-03-30 2005-05-04 Crp Group Ltd Connector
EP3526437B1 (en) 2016-10-17 2021-12-01 National Oilwell Varco Denmark I/S Offshore installation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130995A (en) * 1977-11-03 1978-12-26 Standard Oil Company (Indiana) VMP riser horizontal bearing
GB9807968D0 (en) * 1998-04-16 1998-06-17 Coflexip Connector for marine risers

Also Published As

Publication number Publication date
BR0205417B1 (pt) 2011-01-25
EP1576254A1 (en) 2005-09-21
WO2004055319A1 (en) 2004-07-01
NO334893B1 (no) 2014-06-30
DK1576254T3 (da) 2013-05-27
NO20052973D0 (no) 2005-06-17
NO20052973L (no) 2005-09-12
BR0205417A (pt) 2004-07-20
AU2003287790A1 (en) 2004-07-09

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