EP2245262A1 - Dispositif dans une combinaison de tête de puits/train de tiges - Google Patents

Dispositif dans une combinaison de tête de puits/train de tiges

Info

Publication number
EP2245262A1
EP2245262A1 EP09703755A EP09703755A EP2245262A1 EP 2245262 A1 EP2245262 A1 EP 2245262A1 EP 09703755 A EP09703755 A EP 09703755A EP 09703755 A EP09703755 A EP 09703755A EP 2245262 A1 EP2245262 A1 EP 2245262A1
Authority
EP
European Patent Office
Prior art keywords
wellhead
pipe string
assembly
elastomeric matrix
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09703755A
Other languages
German (de)
English (en)
Other versions
EP2245262B1 (fr
EP2245262A4 (fr
Inventor
Espen Pettersen
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.)
Vasshella Flexibles As
Original Assignee
Vasshella AS
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 Vasshella AS filed Critical Vasshella AS
Publication of EP2245262A1 publication Critical patent/EP2245262A1/fr
Publication of EP2245262A4 publication Critical patent/EP2245262A4/fr
Application granted granted Critical
Publication of EP2245262B1 publication Critical patent/EP2245262B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads

Definitions

  • the present invention relates to a combined wellhead and pipe string assembly designed for installation within an outer casing string, which casing is installed in a well bore in the sea bed and the casing is generally cemented to the sea bed formation, where such wellhead normally is welded to the end of said pipe string
  • an assembly of the introductory kind which is distinguished in that a joint is introduced between the pipe string and the wellhead, and thus replaces said weld, which joint is able to transfer axially acting forces at the same time as the joint suspends flexural moments.
  • the joint comprises an elastomeric matrix located at the interface between the wellhead and the pipe string.
  • the elastomeric matrix can include at least one embedded reinforcing lamella.
  • the elastomeric matrix can include at least one embedded reinforcing lamella.
  • the elastomeric matrix can be in the form of a rubber material, natural or synthetic, possibly resilient polymer material.
  • elastomeric matrix can be vulcanized, glued or similar to a sheet of metal which in turn is fixed to the wellhead.
  • the elastomeric matrix can be vulcanized, glued or similar to a sheet of metal which in turn is fixed to the pipe string.
  • the wellhead is provided with a radially inwardly directed flange having upwardly facing surface for placement of the elastomeric matrix, alternatively the sheet of metal.
  • the pipe string may have a radially outwardly directed flange having downwardly facing surface for placement of the elastomeric matrix, alternatively the sheet of metal.
  • the respective sheets of metal can for example be secured to the wellhead, respectively the pipe string, by means of bolt connections.
  • At least one sealing ring can be included in the joint structure in order to provide for pressure integrity between the pipes.
  • a clearance is present between the peripheral circumferential surface of the pipe string flange and the internal surface of the wellhead. This provides a limited freedom of motion. Further a clearance may be present between the external surface of the pipe string and the internal surface of the wellhead flange, which provides a limited freedom of motion.
  • Fig. 1 shows a longitudinal section through a conventional welded connection between a wellhead and a pipe string according to the prior art
  • Fig. 2 shows a longitudinal section through an exemplary embodiment of an articulated joint between the wellhead and the pipe string according to the invention
  • Fig. 3 shows in a top view an end flange of a pipe string
  • Fig. 4 shows a cross sectional view through the joint connection of fig. 2 in enlarged scale
  • Fig. 5 shows a further enlarged detailed view of the joint connection shown in figure 4.
  • a first, large dimension outer casing 8 is initially lowered into a well bore B in the sea bed 7. Typical diameter is 30". This outer casing 8 is normally 60-100 meters long and is cemented into the well bore B.
  • the well bore B is predrilled down through the formation of the sea bed in a length corresponding to the length above. The drill bit used is normative for the dimension of the well bore B.
  • the casings 3, 8 are assembled of shorter single casing pipes, alternatively stands consisting of three preassembled single pipes, which are joined together by means of threaded connections as they are lowered down into the well bore.
  • the second outer casing 3 terminates in a wellhead 2 at top, which has inner and outer coupling means which are commonly known in the art.
  • the outer coupling means are intended to engage with a termination part 1 at the end of the outer casing 8, which termination part 1 has corresponding, internal coupling means.
  • the wellhead 2 has an annular abutment 5 resting against an inside shoulder 5a formed internally of the termination part 1.
  • the wellhead 2 is traditionally welded to the top of the casing 3 at a place indicated by the reference number 4 in the drawings.
  • the weld is typically a butt weld grinded on both sides.
  • annulus 6 is formed between the outer casing 8 and the second outer casing 3 .
  • the annulus 6 is filled with cement C approximately up to the weld 4.
  • the termination part 1 and the wellhead 2 projects from the sea bed as indicated by the reference number 7.
  • One or more additional casings (not shown), having decreasingly smaller cross sectional dimension, can be installed within the casing 3, all in accordance with the needs regarding the drilling depth and the nature of the formation of the sea bed.
  • the number of pipes has less significance for the invention.
  • the wellhead 2 forms the connecting point for a Christmas three (not shown) which is normally landed from the surface.
  • the Christmas three has required safety mechanisms in the form of valves and rams in order to be able to handle different situations during well drilling and possibly subsequent production of oil and/or gas.
  • Figure 2 shows in longitudinal section a combined wellhead/pipe string assembly 10 according to the present invention in a contemplated installed situation, i.e. substantially vertically oriented. This is the situation it is referred to in this specification when it comes to the terms “upper”, “lower”, “top”, “bottom”, “upwardly”, “downwardly” etc.
  • the combined wellhead/pipe string assembly 10 is installed into the sea bed 7 in the very same way as illustrated in figure 1. This means that the heaviest casing 8' is firstly cemented to the well bore before the casing 3' is cemented to the casing 8', fully corresponding to what is shown and described with reference to figure 1.
  • the wellhead 2' is now a separate part which is in connection with the pipe string 3' via an elastomeric matrix 11 located in the interface between the wellhead 2' and the pipe string 3'.
  • the elastomeric matrix 11 can be in the form of a rubber material, natural or synthetic, alternatively a polymer material.
  • the wellhead 2' has in its lower end 2a an inwardly directed flange 2b.
  • the radially inwardly directed flange 2b has an upwardly facing surface 2c which forms a supporting surface for placement of the elastomeric matrix 11, as shown in further detail in figure 4 and 5.
  • the pipe string 3' has in its upper end 3a a radially outwardly directed flange 3b.
  • the radially outwardly directed flange 3 b has a downwardly facing surface 3 c which forms abutment surface for location of the elastomeric matrix 11, as shown in closer detail in figures 4 and 5.
  • Figure 3 shows the pipe string 3' viewed from above, in particular the outwardly directed flange 3b.
  • the elastomeric matrix 11 can in one embodiment include one or more embedded reinforcing lamellas 12, such as annularly formed plates of metal. These will be able to assist in regulating the load capacity and the rigidity according to specific requirements and demands.
  • the elastomeric matrix 11 constitutes part of a supporting element 13, which in turn acts and performs like a "joint" having limited freedom of motion, consisting of a lower annular reinforcing plate 14, an upper annular reinforcing plate 15 and the elastomeric matrix 11 located between the reinforcing plates 14, 15.
  • the reinforcing plates 14 and 15 are vulcanized or glued to the matrix 11.
  • One or more annular reinforcing plates, or lamellas 12 can possibly be vulcanized into the elastomeric matrix 11.
  • the number and the size of the reinforcing plates 12 will be factors that dictate the load capacity and rigidity of the support elements 13.
  • the support element 13 is secured to respective flange surfaces 2c and 3c by means of a number of bolts (not shown) that is passed through apertures 2e, 3e (figures 3 and 4) in the flanges 2b and 3b of the wellhead 2' and the pipe string 3' respectively, and further down into corresponding threaded holes (14e, 15e) in the respective reinforcing plates 14 and 15 of the support element 13.
  • one or more sealing rings 9 can be provided between the respective flanges 2b, 3b and reinforcing plates 14, 15.
  • a clearance d] is intentionally provided between the peripheral circumferential surface 3d of the pipe string flange 3b and the internal surface 2f of the wellhead 2'.
  • a similar clearance d 2 is present between the external surface 3f of the pipe string 3' and the internal surface 2d of the wellhead flange 2b. This is provided to enable smaller motions between the parts without introducing bending or flexural moments of significance. Thus the limited freedom of motion is ensured.
  • the wellhead 2' As indicated in figure 2, the wellhead 2' according to the invention is assembled of two parts, an upper part and a lower part 2a which are welded together as indicated by the weld seam W 1 .
  • the upper part 3a of the pipe string 3' is welded to the remainder of the pipe string by means of the weld seam w 2 as indicated in figure 2. This is carried out in this way to be able to assemble the respective parts to each other, i.e. the pipe string 3', the support element 13 and the wellhead 2'.
  • the lower part 2a of the wellhead 2' needs to be installed within the upper part 3a of the pipe string 3', with the support element 13 between the flanges 2b and 3b, such as shown in figure 4, before the respective welds W 1 and w 2 can be performed.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

La présente invention concerne un appareil de combinaison de tête de puits (21) et de train de tiges (31) agencé pour être descendu dans un tubage extérieur (8') qui est guidé dans le puits sur le fond marin, le tubage (8') étant normalement moulé dans la formation sous-marine, la tête de puits (2') étant normalement soudée à l'extrémité du train de tige (3') comme illustré. Un joint est disposé entre le train de tiges (31) et la tête de puits (21), au lieu d'une soudure, et donc le joint sera apte au transfert des forces axiales exercées et en même temps supprimer les moments de flexion.
EP09703755.0A 2008-01-25 2009-01-21 Dispositif dans une combinaison de tête de puits/train de tiges Not-in-force EP2245262B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20080477A NO328221B1 (no) 2008-01-25 2008-01-25 Anordning ved brønnhode
PCT/NO2009/000024 WO2009093911A1 (fr) 2008-01-25 2009-01-21 Dispositif dans une combinaison de tête de puits/train de tiges

Publications (3)

Publication Number Publication Date
EP2245262A1 true EP2245262A1 (fr) 2010-11-03
EP2245262A4 EP2245262A4 (fr) 2015-07-08
EP2245262B1 EP2245262B1 (fr) 2017-09-20

Family

ID=40901299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09703755.0A Not-in-force EP2245262B1 (fr) 2008-01-25 2009-01-21 Dispositif dans une combinaison de tête de puits/train de tiges

Country Status (3)

Country Link
EP (1) EP2245262B1 (fr)
NO (1) NO328221B1 (fr)
WO (1) WO2009093911A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2479552B (en) * 2010-04-14 2015-07-08 Aker Subsea Ltd Subsea wellhead providing controlled access to a casing annulus
NO331978B1 (no) 2010-06-22 2012-05-14 Neodrill As Anordning og framgangsmåte for stabilisering av et brønnhode, samt anvendelse av et sugefundament til understøttelse av et brønnhode
NO333368B1 (no) * 2010-10-12 2013-05-13 Vasshella As Styrestolpe
WO2017071709A2 (fr) * 2015-10-29 2017-05-04 Maersk Drilling A/S Procédés et appareil de formation d'un puits en haute mer
GB201717634D0 (en) 2017-10-26 2017-12-13 Statoil Petroleum As Wellhead assembly installation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819967A (en) * 1983-02-14 1989-04-11 Vetco Gray Inc. Conductor tieback connector
US5028079A (en) 1989-10-17 1991-07-02 J. M. Huber Corporation Non-crushing wellhead
US5029647A (en) * 1990-04-27 1991-07-09 Vetco Gray Inc. Subsea wellhead stabilization
US5662169A (en) 1996-05-02 1997-09-02 Abb Vetco Gray Inc. Cuttings injection wellhead system

Also Published As

Publication number Publication date
WO2009093911A1 (fr) 2009-07-30
NO20080477L (no) 2009-07-27
EP2245262B1 (fr) 2017-09-20
EP2245262A4 (fr) 2015-07-08
NO328221B1 (no) 2010-01-11

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