EP0109541A1 - Pipe string tie-back connector - Google Patents
Pipe string tie-back connector Download PDFInfo
- Publication number
- EP0109541A1 EP0109541A1 EP83110271A EP83110271A EP0109541A1 EP 0109541 A1 EP0109541 A1 EP 0109541A1 EP 83110271 A EP83110271 A EP 83110271A EP 83110271 A EP83110271 A EP 83110271A EP 0109541 A1 EP0109541 A1 EP 0109541A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wellhead
- connector
- metal
- housing
- pipe
- 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
Links
- 239000002184 metal Substances 0.000 claims abstract description 15
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical group C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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
- E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
Definitions
- This invention relates to pipe connectors, and more particularly to tie-back connectors for joining a riser pipe string to a casing hanger or other element in a subsea wellhead.
- One of the prior types of pipe connectors for this purpose comprises a union nut style of threaded components that requires rotation of a relatively large ring or sleeve element to make up the connection. Not only is it difficult to properly align the riser with the wellhead so that cross-threading will not occur, it also is troublesome to rotate the ring or sleeve without the aid of special equipment and skilled personnel.
- Another problem with union nut connectors is that their single shoulder is highly loaded when the connection is completed, and this stress results in an undesirably short fatigue life.
- riser connector employs a turnbuckle-style assembly with right and left hand threads between a rotatable sleeve and the two pipe elements that are to be connected.
- the present invention overcomes the foregoing problems and disadvantages by providing a riser tieback connector with a differential thread system that facilitates landing, locking and sealing the riser to the wellhead without rotation of the riser, and that results in a releasable connection with substantially less stress concentration for a given pre-load than that produced by a union nut type connector.
- the differential thread system in the connector of the present invention is employed to first lock the connector to the wellhead, and then to draw the connector seal surface axially into fluid-tight metal-to-metal contact with a sealing surface in the wellhead, both events being accomplished without the possibility of galling or otherwise damaging the seal surface such as might occur when they are joined by relative rotation.
- the tie-back connector of the present invention includes an annular housing which, in use, is attached to the lower end of the riser, an annular landing body below the housing with a shoulder that seats the connector on a complementary stop shoulder in the wellhead, a rotatable sleeve interconnecting the housing and the landing body by means of a differential thread system, and a lock-down ring that is expanded by the sleeve to lock the connector to the wellhead.
- Operational steps involved in using this tie-back connector to interconnect a riser with a wellhead include lowering the riser until the shoulder of the landing body comes to rest on the wellhead stop shoulder, rotating the connector sleeve to expand the lock-down ring into a mating recess in the wellhead, thus locking the connector to the wellhead, and rotating the connector sleeve further to move the housing axially into metal-to-metal sealed contact with the wellhead.
- Rotation of the connector sleeve is accomplished by means of a torque tool attached to a drill pipe string that is lowered inside the riser, releasably connected to the sleeve, and then rotated with respect to the connector housing, landing body and lock-down ring.
- the tie-back connector is associated with a guide assembly that is attached to the riser to seat against the wellhead and serve as a centralizer for the connector housing. Trash seals between the guide assembly and the wellhead protect the tie-back connector and other components of the installation from corrosion, a valuable additional feature should it become necessary to disconnect and remove the riser from the wellhead, for example if reinstallation of a subsea blowout preventer is required.
- Figure 1 illustrates a riser tie-back connector assembly 8 interconnecting a subsea wellhead assembly 10 and a riser 12.
- the wellhead assembly comprises a template 14, a guide assembly 16, guide posts 18 secured to the template 14 and anchoring guide cables 20 that extend to the surface drilling platform (not shown), a conductor housing 22 mounted on top of a conductor pipe 24, a wellhead 26 within and supported on the conductor housing 22, a first or outer casing hanger 28 supported in the wellhead 26 near the lower end thereof, and a second or inner casing hanger 30 also supported in the wellhead 26.
- the second casing hanger 30 is locked into the wellhead 26 by a lock-down assembly 34, which assembly 34 also is utilized to transfer riser loads through the hanger 30 to the wellhead 26, and packoff assemblies 36, 38 establish a fluid-tight seal between the wellhead 26 and the first casing hanger 28, and between the wellhead 26 and the second casing hanger 30, respectively all in a conventional manner.
- the riser tie-back connector assembly 8 which will be described in more detail with reference to Fig. 2, includes an annular housing 40 that is attached at its upper end by bolts 42 to the lower end of the riser 12.
- the housing 40 is surrounded by a guide assembly 44, and the lower portion 40a of the housing 40 functions as an element of a lock-down assembly 46 for the tie-back connector, whereby the housing 40, the guide assembly 44, and the lock-down assembly 46 together constitute the tie-back connector assembly 8.
- Mounted on this connector assembly 8 is a guide frame 48 to which are fixed a plurality of guide sleeves 50 (only two shown) for guiding the assembly 8 on its descent from the surface platform to the wellhead assembly 10.
- the tie-back connector lock-down assembly 46 comprises the lower portion 40a of the housing 40, an annular landing body 52, a rotatable sleeve 54 and a lock-down ring 56.
- the upper end portion of the sleeve 54 is connected to the housing 40 by threads 58
- the landing body 52 is connected by threads 60 to the lower portion of the sleeve 54.
- the threads 58, 60 are so related that they constitute a differential thread system, for example by differing in their pitch, whereby rotation of the sleeve 54 with respect to the housing 40 and landing body 52 in one direction tends to pull the housing and landing body towards each other, and rotation in the opposite direction tends to push the housing and landing body apart.
- the landing body 52 includes an annular shoulder 52a that cooperates with a complementary shoulder 30a on the second or inner casing hanger 30, and the landing body is keyed to the hanger 30 at 62 to prevent rotation of the landing body with respect to the hanger.
- the lock-down ring 56 which has a single axial split and is of resilient construction, is carried on the sleeve 54 surrounding its reduced outside diameter area 54a.
- the upper end of the area 54a is formed by an annular frusto-conical shoulder 54b which functions to cam the ring 56 outwardly from a retracted condition (not shown) into an expanded condition (Fig. 2) as the sleeve 54 is threaded downwardly with respect to the landing body 52.
- the lower end of the housing 40 is tapered to cooperate with an annular shoulder 30a on the inside surface of the hanger 30 to establish a metal-to-metal seal at 66 between the housing and hanger.
- Annular resilient seals 68 just above the metal-to-metal seal 66 provide a fluid-tight barrier between the housing 40 and hanger 30 prior to establishing the metal-to-metal seal 66.
- the sleeve 54 similarly carries annular resilient seals 70 at its lower end to effect sealing engagement with the hanger 30, and an annular resilient seal 72 at the upper end of the sleeve 54 provides the requisite trash seal between the sleeve and the housing 40.
- the tie-back connector assembly 8 and the riser 12 to which it is attached are lowered to the subsea wellhead assembly 10.
- the guide assembly 44 contacts and seats on the wellhead 26, thus serving as a centralizer for the housing 40.
- a downward force is then applied to the housing 40 through the riser 12, pushing the housing and the tie-back connector lock-down assembly 46 further into the wellhead 26 until the landing body shoulder 52a lands and seats on the casing hanger shoulder 30a (Fig. 2).
- a torquing tool (not shown) is then lowered through the riser 12 by means of a drill pipe string (not shown).
- a drill pipe string (not shown).
- elements on the tool expand into these grooves and releasably lock the tool to the sleeve.
- the drill string is then rotated, thereby rotating the running tool and the sleeve 54.
- the sleeve 54 rotates it moves downwardly within the landing body 52, thereby expanding the lock-down ring 56 into the mating grooves in the casing hanger 30 and securing the body 52 against upward movement.
- the differential threads 58, 60 cause the connector housing 40 to move downward until its lower end comes to rest on the hanger shoulder 30a, thereby establishing a metal-to-metal seal at 66 between the sleeve and the hanger. Accordingly, at this final position three seals exist between the connector assembly and the hanger 30, i.e. the two resilient seals 68 and the metal-to-metal seal 66, thereby assuring the maintenance of pressure integrity between the riser annulus and the exterior of the wellhead installation.
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Ladders (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
Description
- This invention relates to pipe connectors, and more particularly to tie-back connectors for joining a riser pipe string to a casing hanger or other element in a subsea wellhead.
- The product of oil and gas from offshore wells is an established major endeavor of the petroleum industry, and requires techniques and apparatus for connecting strings of pipe to subsea wellheads to provide conduits between the wellheads and the frilling and/or production platforms at the water surface. Whereas divers can be used to make up these connections at relatively shallow depths, their employment is very costly and involves undesirable elements of risk, thereby encouraging the development of remotely operable connector systems that do not require diver assist. The search for and production of oil in deep water, and especially at depths beyond practical diver operations, has increased the need for well equipment that can be installed and operated entirely by remote control from a surface facility, and the prior art reflects considerable development in that area.
- One of the prior types of pipe connectors for this purpose comprises a union nut style of threaded components that requires rotation of a relatively large ring or sleeve element to make up the connection. Not only is it difficult to properly align the riser with the wellhead so that cross-threading will not occur, it also is troublesome to rotate the ring or sleeve without the aid of special equipment and skilled personnel. Another problem with union nut connectors is that their single shoulder is highly loaded when the connection is completed, and this stress results in an undesirably short fatigue life.
- Another type of known riser connector employs a turnbuckle-style assembly with right and left hand threads between a rotatable sleeve and the two pipe elements that are to be connected. Although the principle of this connector type is sound, in practice it requires undesirably high torque in order to produce the pre-load required for proper functioning.
- In a third category of riser connectors the entire riser must be rotated in order to make up the connection at the wellhead. Not only is it difficult to handle these very heavy, and often quite lengthy and complex, strings of pipe, their rotation can result in fatally galling the metal-to-metal seal that must be employed at the wellhead, thereby requiring disconnection and removal of the riser, replacement of the seal, and another attempt to establish a fluid-tight joint.
- The present invention overcomes the foregoing problems and disadvantages by providing a riser tieback connector with a differential thread system that facilitates landing, locking and sealing the riser to the wellhead without rotation of the riser, and that results in a releasable connection with substantially less stress concentration for a given pre-load than that produced by a union nut type connector. The differential thread system in the connector of the present invention is employed to first lock the connector to the wellhead, and then to draw the connector seal surface axially into fluid-tight metal-to-metal contact with a sealing surface in the wellhead, both events being accomplished without the possibility of galling or otherwise damaging the seal surface such as might occur when they are joined by relative rotation.
- The tie-back connector of the present invention includes an annular housing which, in use, is attached to the lower end of the riser, an annular landing body below the housing with a shoulder that seats the connector on a complementary stop shoulder in the wellhead, a rotatable sleeve interconnecting the housing and the landing body by means of a differential thread system, and a lock-down ring that is expanded by the sleeve to lock the connector to the wellhead.
- Operational steps involved in using this tie-back connector to interconnect a riser with a wellhead include lowering the riser until the shoulder of the landing body comes to rest on the wellhead stop shoulder, rotating the connector sleeve to expand the lock-down ring into a mating recess in the wellhead, thus locking the connector to the wellhead, and rotating the connector sleeve further to move the housing axially into metal-to-metal sealed contact with the wellhead. Rotation of the connector sleeve is accomplished by means of a torque tool attached to a drill pipe string that is lowered inside the riser, releasably connected to the sleeve, and then rotated with respect to the connector housing, landing body and lock-down ring.
- In its preferred form, the tie-back connector is associated with a guide assembly that is attached to the riser to seat against the wellhead and serve as a centralizer for the connector housing. Trash seals between the guide assembly and the wellhead protect the tie-back connector and other components of the installation from corrosion, a valuable additional feature should it become necessary to disconnect and remove the riser from the wellhead, for example if reinstallation of a subsea blowout preventer is required.
-
- Figure 1 is a side elevation, partially in section, of a subsea wellhead installation and a riser releasably attached thereto by means of a tieback connector according to the present-invention.
- Figure 2 is a fragmentary view, in side elevation and on an enlarged scale, of the Figure 1 installation, showing in better detail the tie-back connector components.
- Attention is directed first to Figure 1 which illustrates a riser tie-
back connector assembly 8 interconnecting asubsea wellhead assembly 10 and ariser 12. The wellhead assembly comprises atemplate 14, aguide assembly 16,guide posts 18 secured to thetemplate 14 andanchoring guide cables 20 that extend to the surface drilling platform (not shown), aconductor housing 22 mounted on top of aconductor pipe 24, awellhead 26 within and supported on theconductor housing 22, a first orouter casing hanger 28 supported in thewellhead 26 near the lower end thereof, and a second orinner casing hanger 30 also supported in thewellhead 26. - The
second casing hanger 30 is locked into thewellhead 26 by a lock-down assembly 34, whichassembly 34 also is utilized to transfer riser loads through thehanger 30 to thewellhead 26, andpackoff assemblies wellhead 26 and thefirst casing hanger 28, and between thewellhead 26 and thesecond casing hanger 30, respectively all in a conventional manner. - The riser tie-
back connector assembly 8, which will be described in more detail with reference to Fig. 2, includes anannular housing 40 that is attached at its upper end bybolts 42 to the lower end of theriser 12. In the illustrated embodiment, thehousing 40 is surrounded by aguide assembly 44, and thelower portion 40a of thehousing 40 functions as an element of a lock-down assembly 46 for the tie-back connector, whereby thehousing 40, theguide assembly 44, and the lock-down assembly 46 together constitute the tie-back connector assembly 8. Mounted on thisconnector assembly 8 is aguide frame 48 to which are fixed a plurality of guide sleeves 50 (only two shown) for guiding theassembly 8 on its descent from the surface platform to thewellhead assembly 10. - With reference now to Figure 2, the tie-back connector lock-down
assembly 46 comprises thelower portion 40a of thehousing 40, anannular landing body 52, arotatable sleeve 54 and a lock-downring 56..The upper end portion of thesleeve 54 is connected to thehousing 40 bythreads 58, and thelanding body 52 is connected bythreads 60 to the lower portion of thesleeve 54. Thethreads sleeve 54 with respect to thehousing 40 andlanding body 52 in one direction tends to pull the housing and landing body towards each other, and rotation in the opposite direction tends to push the housing and landing body apart. Thelanding body 52 includes anannular shoulder 52a that cooperates with acomplementary shoulder 30a on the second orinner casing hanger 30, and the landing body is keyed to thehanger 30 at 62 to prevent rotation of the landing body with respect to the hanger. - The lock-down
ring 56, which has a single axial split and is of resilient construction, is carried on thesleeve 54 surrounding its reducedoutside diameter area 54a. The upper end of thearea 54a is formed by an annular frusto-conical shoulder 54b which functions to cam thering 56 outwardly from a retracted condition (not shown) into an expanded condition (Fig. 2) as thesleeve 54 is threaded downwardly with respect to thelanding body 52. - The lower end of the
housing 40 is tapered to cooperate with anannular shoulder 30a on the inside surface of thehanger 30 to establish a metal-to-metal seal at 66 between the housing and hanger. Annular resilient seals 68 just above the metal-to-metal seal 66 provide a fluid-tight barrier between thehousing 40 andhanger 30 prior to establishing the metal-to-metal seal 66. Thesleeve 54 similarly carries annularresilient seals 70 at its lower end to effect sealing engagement with thehanger 30, and an annularresilient seal 72 at the upper end of thesleeve 54 provides the requisite trash seal between the sleeve and thehousing 40. - With respect to the structures illustrated in the drawings, after the
casing hanger 30 has been locked down by means, of the lock-down assembly 34 and thepackoff assembly 38, the tie-back connector assembly 8 and theriser 12 to which it is attached are lowered to thesubsea wellhead assembly 10. Theguide assembly 44 contacts and seats on thewellhead 26, thus serving as a centralizer for thehousing 40. A downward force is then applied to thehousing 40 through theriser 12, pushing the housing and the tie-back connector lock-downassembly 46 further into thewellhead 26 until thelanding body shoulder 52a lands and seats on thecasing hanger shoulder 30a (Fig. 2). - A torquing tool (not shown) is then lowered through the
riser 12 by means of a drill pipe string (not shown). When the tool arrives at the grooves 80 (Fig. 2) in the lock-down assembly sleeve 54, elements on the tool expand into these grooves and releasably lock the tool to the sleeve. The drill string is then rotated, thereby rotating the running tool and thesleeve 54. As thesleeve 54 rotates it moves downwardly within thelanding body 52, thereby expanding the lock-downring 56 into the mating grooves in thecasing hanger 30 and securing thebody 52 against upward movement. As rotation of thesleeve 54 is continued thedifferential threads hanger shoulder 30a, thereby establishing a metal-to-metal seal at 66 between the sleeve and the hanger. Accordingly, at this final position three seals exist between the connector assembly and thehanger 30, i.e. the two resilient seals 68 and the metal-to-metal seal 66, thereby assuring the maintenance of pressure integrity between the riser annulus and the exterior of the wellhead installation. - Although the best mode contemplated for carrying out the present invention has been herein shown and described, it will be apparent that modification and variation may be made without departing from what is regarded to be the subject matter of the invention.
Claims (12)
whereby with said connector positioned within a subsea wellhead rotation of said interconnecting means with respect to said housing and said landing body effects locking said connector to said wellhead.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83110271T ATE24224T1 (en) | 1982-10-14 | 1983-10-14 | CONNECTING DEVICE FOR PIPE TRAIN. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1982/001474 WO1984001610A1 (en) | 1982-10-14 | 1982-10-14 | Pipe string tie-back connector |
WOPCT/US82/01474 | 1982-10-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0109541A1 true EP0109541A1 (en) | 1984-05-30 |
EP0109541B1 EP0109541B1 (en) | 1986-12-10 |
Family
ID=22168293
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82903541A Withdrawn EP0122259A1 (en) | 1982-10-14 | 1982-10-14 | Pipe string tie-back connector |
EP83110271A Expired EP0109541B1 (en) | 1982-10-14 | 1983-10-14 | Pipe string tie-back connector |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82903541A Withdrawn EP0122259A1 (en) | 1982-10-14 | 1982-10-14 | Pipe string tie-back connector |
Country Status (9)
Country | Link |
---|---|
EP (2) | EP0122259A1 (en) |
JP (1) | JPS59501676A (en) |
AT (1) | ATE24224T1 (en) |
AU (1) | AU555841B2 (en) |
BR (1) | BR8305690A (en) |
CA (1) | CA1205741A (en) |
DE (1) | DE3368306D1 (en) |
NO (1) | NO842363L (en) |
WO (1) | WO1984001610A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987001156A1 (en) * | 1985-08-12 | 1987-02-26 | Cbv Indústria Mecânica S.A. | Equipment for installation of modules on fixed underwater bases, specially for undersea petroleum wells |
GB2229782A (en) * | 1989-03-29 | 1990-10-03 | Vetco Gray Inc | Pipe connector with grooved deflector section |
GB2237086A (en) * | 1989-10-16 | 1991-04-24 | Vetco Gray Inc | Internal tieback connector |
GB2326893A (en) * | 1997-07-03 | 1999-01-06 | Baker Hughes Inc | One-trip method of removing a tubing string from a downhole receptacle |
US7467663B2 (en) * | 2004-09-07 | 2008-12-23 | Dril-Quip, Inc. | High pressure wellhead assembly interface |
US7861789B2 (en) * | 2005-02-09 | 2011-01-04 | Vetco Gray Inc. | Metal-to-metal seal for bridging hanger or tieback connection |
US20150176358A1 (en) * | 2013-12-20 | 2015-06-25 | Dril-Quip, Inc. | Inner drilling riser tie-back connector for subsea wellheads |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2193773A (en) * | 1986-08-08 | 1988-02-17 | Howden James & Co Ltd | Pipeline safety joint |
GB9123928D0 (en) * | 1991-11-11 | 1992-01-02 | Alpha Thames Eng | Two-part connector for fluid carrying container |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3489213A (en) * | 1968-04-18 | 1970-01-13 | Fmc Corp | Underwater well completion system |
US3521909A (en) * | 1965-05-19 | 1970-07-28 | Richfield Oil Corp | Remote underwater wellhead connector |
US3986729A (en) * | 1975-08-11 | 1976-10-19 | Cameron Iron Works, Inc. | Connecting apparatus |
GB2094430A (en) * | 1981-03-06 | 1982-09-15 | Vetco Inc | Production casing tieback connector assembly |
EP0060549A1 (en) * | 1981-03-16 | 1982-09-22 | Fmc Corporation | Thread-type pipe connector |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4046405A (en) * | 1972-05-15 | 1977-09-06 | Mcevoy Oilfield Equipment Co. | Run-in and tie back apparatus |
US3809158A (en) * | 1972-07-27 | 1974-05-07 | Rockwell International Corp | Well completion apparatus and method |
US4085951A (en) * | 1976-10-28 | 1978-04-25 | Wonder Products Company | Hydril-type connector |
-
1982
- 1982-10-14 WO PCT/US1982/001474 patent/WO1984001610A1/en unknown
- 1982-10-14 AU AU91262/82A patent/AU555841B2/en not_active Ceased
- 1982-10-14 JP JP57503524A patent/JPS59501676A/en active Pending
- 1982-10-14 EP EP82903541A patent/EP0122259A1/en not_active Withdrawn
-
1983
- 1983-10-13 CA CA000438908A patent/CA1205741A/en not_active Expired
- 1983-10-14 AT AT83110271T patent/ATE24224T1/en not_active IP Right Cessation
- 1983-10-14 EP EP83110271A patent/EP0109541B1/en not_active Expired
- 1983-10-14 DE DE8383110271T patent/DE3368306D1/en not_active Expired
- 1983-10-14 BR BR8305690A patent/BR8305690A/en unknown
-
1984
- 1984-06-13 NO NO842363A patent/NO842363L/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3521909A (en) * | 1965-05-19 | 1970-07-28 | Richfield Oil Corp | Remote underwater wellhead connector |
US3489213A (en) * | 1968-04-18 | 1970-01-13 | Fmc Corp | Underwater well completion system |
US3986729A (en) * | 1975-08-11 | 1976-10-19 | Cameron Iron Works, Inc. | Connecting apparatus |
GB2094430A (en) * | 1981-03-06 | 1982-09-15 | Vetco Inc | Production casing tieback connector assembly |
EP0060549A1 (en) * | 1981-03-16 | 1982-09-22 | Fmc Corporation | Thread-type pipe connector |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987001156A1 (en) * | 1985-08-12 | 1987-02-26 | Cbv Indústria Mecânica S.A. | Equipment for installation of modules on fixed underwater bases, specially for undersea petroleum wells |
GB2229782A (en) * | 1989-03-29 | 1990-10-03 | Vetco Gray Inc | Pipe connector with grooved deflector section |
GB2229782B (en) * | 1989-03-29 | 1992-11-18 | Vetco Gray Inc | Pressure tube with deflecting section |
GB2237086A (en) * | 1989-10-16 | 1991-04-24 | Vetco Gray Inc | Internal tieback connector |
GB2237086B (en) * | 1989-10-16 | 1993-09-15 | Vetco Gray Inc | Internal tieback connector |
US5924491A (en) * | 1997-07-03 | 1999-07-20 | Baker Hughes Incorporated | Thru-tubing anchor seal assembly and/or packer release devices |
GB2326893A (en) * | 1997-07-03 | 1999-01-06 | Baker Hughes Inc | One-trip method of removing a tubing string from a downhole receptacle |
US5988287A (en) * | 1997-07-03 | 1999-11-23 | Baker Hughes Incorporated | Thru-tubing anchor seal assembly and/or packer release devices |
GB2326893B (en) * | 1997-07-03 | 2001-12-19 | Baker Hughes Inc | Thru-tubing anchor seal assembly and/or packer release devices |
US7467663B2 (en) * | 2004-09-07 | 2008-12-23 | Dril-Quip, Inc. | High pressure wellhead assembly interface |
US7861789B2 (en) * | 2005-02-09 | 2011-01-04 | Vetco Gray Inc. | Metal-to-metal seal for bridging hanger or tieback connection |
US20150176358A1 (en) * | 2013-12-20 | 2015-06-25 | Dril-Quip, Inc. | Inner drilling riser tie-back connector for subsea wellheads |
US9303480B2 (en) * | 2013-12-20 | 2016-04-05 | Dril-Quip, Inc. | Inner drilling riser tie-back connector for subsea wellheads |
Also Published As
Publication number | Publication date |
---|---|
WO1984001610A1 (en) | 1984-04-26 |
AU9126282A (en) | 1984-05-04 |
EP0122259A1 (en) | 1984-10-24 |
CA1205741A (en) | 1986-06-10 |
AU555841B2 (en) | 1986-10-09 |
ATE24224T1 (en) | 1986-12-15 |
EP0109541B1 (en) | 1986-12-10 |
BR8305690A (en) | 1984-07-10 |
NO842363L (en) | 1984-06-13 |
DE3368306D1 (en) | 1987-01-22 |
JPS59501676A (en) | 1984-10-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7861789B2 (en) | Metal-to-metal seal for bridging hanger or tieback connection | |
US4653589A (en) | Mudline casing hanger tieback adaptor with adjustable load ring | |
US4836288A (en) | Casing hanger and packoff running tool | |
US6571877B1 (en) | Wellhead | |
US3421580A (en) | Underwater well completion method and apparatus | |
US5259459A (en) | Subsea wellhead tieback connector | |
US4691790A (en) | Method and apparatus for removing the inner conduit from a dual passage drill string | |
US4416472A (en) | Holddown and packoff apparatus | |
US4408783A (en) | Holddown apparatus | |
US5141051A (en) | Electrical wet connect and check valve for a drill string | |
CA1252387A (en) | Method and apparatus for connecting a tubular element to an underwater wellhead | |
US4519633A (en) | Subsea well casing tieback connector | |
US4653778A (en) | Lockdown connector for mudline wellhead tieback adaptor | |
US4958686A (en) | Subsea well completion system and method of operation | |
US5240081A (en) | Mudline subsea wellhead system | |
US5279369A (en) | Tieback receptacle with upward and downward facing funnel sections | |
NO20191007A1 (en) | A structure for supporting a flow-control apparatus on a seabed foundation for a well, a subsea assembly, a method of assembling the structure and a method of deploying and installing the structure | |
US5159982A (en) | Double walled riser | |
US4919454A (en) | Tieback connector with protective landing sleeve | |
AU555841B2 (en) | Pipe string tie-back connector | |
US3521909A (en) | Remote underwater wellhead connector | |
WO1998049422A1 (en) | Apparatus and method for subsea connections of trees to subsea wellheads | |
US9670733B1 (en) | Subsea multibore drilling and completion system | |
US3548934A (en) | Underwater well completion system | |
US20220127913A1 (en) | Rotatable mandrel hanger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT DE FR GB IT NL SE |
|
17P | Request for examination filed |
Effective date: 19840528 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE FR GB IT NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 19861210 Ref country code: AT Effective date: 19861210 |
|
REF | Corresponds to: |
Ref document number: 24224 Country of ref document: AT Date of ref document: 19861215 Kind code of ref document: T |
|
ET | Fr: translation filed | ||
REF | Corresponds to: |
Ref document number: 3368306 Country of ref document: DE Date of ref document: 19870122 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19871031 Year of fee payment: 5 |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19881014 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19881015 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19890501 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19890630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19890701 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 83110271.0 Effective date: 19890619 |