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WO1999030124A1 - Verification de l'etancheite d'un raccordement pour fluides - Google Patents

Verification de l'etancheite d'un raccordement pour fluides Download PDF

Info

Publication number
WO1999030124A1
WO1999030124A1 PCT/GB1998/003578 GB9803578W WO9930124A1 WO 1999030124 A1 WO1999030124 A1 WO 1999030124A1 GB 9803578 W GB9803578 W GB 9803578W WO 9930124 A1 WO9930124 A1 WO 9930124A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
fluid
socket
testing
tubular portion
Prior art date
Application number
PCT/GB1998/003578
Other languages
English (en)
Inventor
Frederick D. Mckay
Original Assignee
Cromar Sales And Service Limited
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 Cromar Sales And Service Limited filed Critical Cromar Sales And Service Limited
Priority to AU13430/99A priority Critical patent/AU1343099A/en
Priority to EP98957000A priority patent/EP0958489A1/fr
Priority to GB9918363A priority patent/GB2337602A/en
Priority to CA002280834A priority patent/CA2280834A1/fr
Publication of WO1999030124A1 publication Critical patent/WO1999030124A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals

Definitions

  • This invention relates to a method of testing the sealing integrity of a fluid coupling in a fluid pressure line.
  • the invention has been developed primarily in connection with the testing of the sealing integrity of a fluid coupling in a pressure line leading to an underground reservoir of hydrocarbons (in liquid and / or gaseous form) , and which usually comprises a Christmas tree, a blow-out preventer (BOP) , a wireline lubricator, and a surface stuffing box.
  • BOP blow-out preventer
  • the internal thread on the collar matches the external thread on the box end, and this thread makes-up quickly by hand, and should be kept clean.
  • the sealing ring is preferably an O-ring, which forms the seal to contain the pressure, and which should be thoroughly inspected periodically for damage, and replacement if necessary.
  • a light film of oil (or grease) helps to make up the union and prevent cutting or chafing of the O-ring.
  • the collar of the coupling is therefore tightened manually, when the pin end, with an O-ring mounted thereon, is stopped by the internal abutment or shoulder in the socket.
  • the collar normally should be backed-off approximately one quarter of a turn, to eliminate any possibility of it sticking due to friction when it is required subsequently to be removed.
  • rocking of the lubricator assembly to ensure it is perfectly straight, will assist in loosening the coupling.
  • the wellhead lubricator assembly usually consists of several sections of equipment, all screwed together by means of quick unions, in various sizes, and which are designed to be hand- operated. After each operation, the connection above the blowout preventer is broken out, to change out the various tools inside. When re-assembled, the one seal which has been broken out needs to be re-tested, which means that the entire assembly needs to be filled with glycol and then pressure tested. This takes a lot of fluid, and additional down time, with consequent costs, and delays in production.
  • the present invention has therefore been developed with a view to improving the design of a "quick union" type of coupling in a fluid pressure line, in order to provide an improved method of testing the sealing integrity.
  • a method according to the invention is defined in claim 1. Preferred features of the method are set out in the dependent claims.
  • a fluid coupling according to the invention is defined in claim 10.
  • Figure 1 is a schematic illustration of a typical arrangement of fluid pressure line to which a testing method according to the invention may be applied, the pressure line comprising a pressurised hydrocarbon line running from an underground reservoir via a borehole and to surface equipment; and,
  • Figure 2 is an enlarged view of a coupling device in the form of a "quick union" to be incorporated in the pressure line of the surface equipment.
  • FIG. 1 of the drawings this sets out the background to the invention, and shows a typical arrangement of surface equipment of a hydrocarbon extraction line, comprising a usual borehole extending to the surface (not shown), a Christmas tree 10, a tree connection 11, a blow-out preventer 12, a wireline lubricator 13 and a stuffing box 14. So-called "quick unions" are incorporated in the surface equipment, one of which is shown by reference numeral 15 immediately above the blow-out preventer 12, and the other of which is shown by reference 16, below wireline lubricator 13.
  • typically “quick unions” are manually operated, and comprise a box having an externally threaded box end, which defines an internal socket into which can be slidably received a pin coupling.
  • the pin coupling has an external circumferential groove in which a sealing ring is received, and which engages sealingly against the internal wall of the socket.
  • a manually operated collar is provided, having an internal thread which mates with the external thread on the box end, and which is simply tightened manually to complete the coupling assembly.
  • the depth of insertion of the pin end into the box is limited by an internal shoulder or abutment, at an inner end of the socket, and when the pin end reaches the required entry position, the collar is then tightened manually.
  • the improved coupling is designated generally by reference 20, and comprises a first coupling portion 21 and a second coupling portion 22 which are slidably interengageable between release and sealingly engaged positions.
  • coupling portion 21 comprises a "box end”
  • coupling portion 22 comprises a coupling pin.
  • the coupling portion 21 defines a receiving socket 23 having a cylindrical surface, and which receives slidingly the free end 24 of the coupling portion 22.
  • the socket 23 is cylindrical, but merges at its inner end into an internal shoulder or abutment 25 which forms one means of limiting the depth of insertion of the end 24, and at its outer end merges into an external abutment or shoulder 26 which forms an alternative, or additional means of limiting the depth of insertion of the end 24.
  • a circumferential rib 27 of the coupling portion 22 engages shoulder 26, to limit the depth of insertion of the end 24.
  • the outer surface of end 24 carries a first sealing ring 28, which is housed in a circumferential groove 29, and which engages sealingly with the internal wall of the socket 23, in order to seal the coupling between coupling portions 21 and 22.
  • Sealing ring 28 therefore functions as a primary seal, but in order to retest the sealing integrity of the primary seal 28, additional components are provided in the coupling 20.
  • a secondary seal 29 is therefore provided, spaced downstream of primary seal 78, with respect to the normal flow direction, and which is housed in a further circumferential groove 30 formed in the outer surface of end 24. Secondary seal 29 functions as a retainer seal, and facilitates the testing procedure which will be described below.
  • the coupling between portions 21 and 22 is completed by provision of a manually rotatable coupling collar 31, which is rotatably mounted on circumferential rib 27, and which has an internal thread which mates with an external thread on coupling portion 21, the interengagement between these two threads being shown by reference 32. Manual tightening and untightening only is required, in order to complete the coupling assembly.
  • the coupling 20 shown in Figure 2 can be tested by introduction of pressure testing fluid into an annular testing chamber 33 defined between the outer surface of pin end 24 and the inner wall of socket 23.
  • annular chamber 33 is formed in the wall of the socket 23, as shown in Figure 2.
  • the pressure testing fluid is introduced into chamber 33 up to a required pressure, by application of fluid pressure to an external injection port 34. Monitoring of the testing fluid pressure will show whether there is any leakage, and therefore enable the sealing integrity or otherwise of the coupling to be tested, after temporary shutdown of the surface equipment.
  • the testing method achievable with the new coupling shown in Figure 2 is quick and clean, and results in a saving of both time and material.
  • the equipment is left in situ, and normal operations are carried out with the test unit in place. On each occasion that the assembly needs to be "broken-out", it is done on this coupling, so the test is carried out each and every time that the assembly is broken out.
  • the fluid coupling shown in Figure 2 is preferably located above the blow-out preventer, when the coupling forms a "quick union" incorporated in a hydrocarbon production line.
  • the quick union coupling to other forms of fluid pressure line, and in application to a hydrocarbon production line, to releasable couplings arranged below the blow-out preventer.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un raccordement pour fluides (20) aménagé dans une conduite pour fluides sous pression, p.ex. dans une conduite industrielle pour hydrocarbures reliée à un réservoir souterrain. Selon l'invention, on peut vérifier l'étanchéité du raccordement après l'arrêt de l'écoulement dans la conduite sous pression, effectué à des fins de réparation ou d'entretien et suivi de démontage du raccordement. Le raccordement (20) comprend: une section en amont (21) et une section en aval (22) reliées l'une à l'autre de façon amovible, l'une desdites sections délimitant une douille cylindrique (23) et l'autre section comprenant une partie tubulaire (24) qui rentre coulissant dans la douille (23); une premier et un deuxième joints circulaires (28, 29) disposés avec un espacement axial et destinés à obturer de façon étanche la jonction entre la surface externe de la partie tubulaire (24) et la surface interne de la douille (23); une chambre de pression (33) définie à la jonction entre les premier et deuxième joints (28, 29); et un orifice de vérification (34) pour l'entrée de fluides, disposé dans l'une des sections de raccordement (21) et communiquant avec la chambre de pression (33). Selon l'invention, le procédé de vérification consiste à introduire un dispositif de vérification de la pression de fluide dans la chambre (23), à travers l'orifice de vérification (34), et ce pour vérifier l'étanchéité du raccordement après le remontage de ce dernier.
PCT/GB1998/003578 1997-12-09 1998-11-30 Verification de l'etancheite d'un raccordement pour fluides WO1999030124A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU13430/99A AU1343099A (en) 1997-12-09 1998-11-30 The testing of the integrity of a fluid coupling
EP98957000A EP0958489A1 (fr) 1997-12-09 1998-11-30 Verification de l'etancheite d'un raccordement pour fluides
GB9918363A GB2337602A (en) 1997-12-09 1998-11-30 The testing of the integrity of a fluid coupling
CA002280834A CA2280834A1 (fr) 1997-12-09 1998-11-30 Verification de l'integrite d'un coupleur hydraulique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9725912.1A GB9725912D0 (en) 1997-12-09 1997-12-09 The testing of the integrity of a fluid coupling
GB9725912.1 1997-12-09

Publications (1)

Publication Number Publication Date
WO1999030124A1 true WO1999030124A1 (fr) 1999-06-17

Family

ID=10823264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003578 WO1999030124A1 (fr) 1997-12-09 1998-11-30 Verification de l'etancheite d'un raccordement pour fluides

Country Status (5)

Country Link
EP (1) EP0958489A1 (fr)
AU (1) AU1343099A (fr)
CA (1) CA2280834A1 (fr)
GB (2) GB9725912D0 (fr)
WO (1) WO1999030124A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832216A1 (fr) * 2001-11-15 2003-05-16 Atea Soc Atlantique De Tech Av Procede et dispositif de controle d'une portee d'etancheite d'un ensemble tubulaire et utilisation
WO2013144593A1 (fr) * 2012-03-27 2013-10-03 Aquaspira Limited Joint de tuyau et procédé de fermeture étanche/essai
GB2516574A (en) * 2012-03-27 2015-01-28 Aquaspira Ltd Pipe joint and method of sealing/testing
CN109210302A (zh) * 2018-09-20 2019-01-15 卢俊文 一种压力管道快速试压接头及试压方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2579242C (en) * 2018-11-27 2024-08-21 Siemens Energy Global Gmbh & Co Kg Seal assembly and method of testing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550742A1 (de) * 1975-11-12 1977-05-18 Erich Kiesling Verfahren zur dichtigkeitspruefung der zusammenfuegungsstellen von rohren
GB2213539A (en) * 1987-12-11 1989-08-16 Blohm Voss Ag Shaft seal
FR2631098A1 (fr) * 1988-05-05 1989-11-10 Genou Patrick Dispositif de raccord a collecteur et/ou detecteur de fuite incorpore
US4926680A (en) * 1988-02-09 1990-05-22 Hasha Brian B Method and apparatus for externally and internally testing for leaks in connections between tubular members
JPH039828A (ja) * 1989-06-07 1991-01-17 Mitsui Petrochem Ind Ltd 押出機ベントボックスのシール部構造
WO1998001696A1 (fr) * 1996-07-03 1998-01-15 Codelast Limited Raccords

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550742A1 (de) * 1975-11-12 1977-05-18 Erich Kiesling Verfahren zur dichtigkeitspruefung der zusammenfuegungsstellen von rohren
GB2213539A (en) * 1987-12-11 1989-08-16 Blohm Voss Ag Shaft seal
US4926680A (en) * 1988-02-09 1990-05-22 Hasha Brian B Method and apparatus for externally and internally testing for leaks in connections between tubular members
FR2631098A1 (fr) * 1988-05-05 1989-11-10 Genou Patrick Dispositif de raccord a collecteur et/ou detecteur de fuite incorpore
JPH039828A (ja) * 1989-06-07 1991-01-17 Mitsui Petrochem Ind Ltd 押出機ベントボックスのシール部構造
WO1998001696A1 (fr) * 1996-07-03 1998-01-15 Codelast Limited Raccords

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 120 (M - 1096) 25 March 1991 (1991-03-25) *
See also references of EP0958489A1 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832216A1 (fr) * 2001-11-15 2003-05-16 Atea Soc Atlantique De Tech Av Procede et dispositif de controle d'une portee d'etancheite d'un ensemble tubulaire et utilisation
WO2013144593A1 (fr) * 2012-03-27 2013-10-03 Aquaspira Limited Joint de tuyau et procédé de fermeture étanche/essai
GB2516574A (en) * 2012-03-27 2015-01-28 Aquaspira Ltd Pipe joint and method of sealing/testing
CN109210302A (zh) * 2018-09-20 2019-01-15 卢俊文 一种压力管道快速试压接头及试压方法
CN109210302B (zh) * 2018-09-20 2020-03-20 卢俊文 一种压力管道快速试压接头及试压方法

Also Published As

Publication number Publication date
GB9725912D0 (en) 1998-02-04
GB9918363D0 (en) 1999-10-06
AU1343099A (en) 1999-06-28
GB2337602A (en) 1999-11-24
EP0958489A1 (fr) 1999-11-24
CA2280834A1 (fr) 1999-06-17

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