USRE32274E - Marine tether anchoring device - Google Patents
Marine tether anchoring device Download PDFInfo
- Publication number
- USRE32274E USRE32274E US06/675,598 US67559884A USRE32274E US RE32274 E USRE32274 E US RE32274E US 67559884 A US67559884 A US 67559884A US RE32274 E USRE32274 E US RE32274E
- Authority
- US
- United States
- Prior art keywords
- collet
- tether line
- wedging means
- segments
- anchor body
- 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 - Fee Related
Links
Images
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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/10—Guide posts, e.g. releasable; Attaching guide lines to underwater guide bases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
Definitions
- the invention relates to marine tether anchoring devices.
- a marine tether anchoring device comprising an anchor body, a segmented spring collet surrounding said body movable axially relative thereto and arranged to be expanded at its upper end by wedging means attached to said anchor body as said anchor body moves downwardly relative to said collet so that the expanded upper end of the collet lockingly engages the wall of an anchoring chamber and the lower end of a tether line attached to said wedging means cannot escape from said anchoring chamber, and controllable actuator means in said body operable to move the collet downwardly relative to said body so that the upper end of the collet is released from the wedging means and can retract away from the wall of the anchoring chamber to provide an unlocked condition of said device.
- the device is self-locking under gravity since the weight of the anchor body and tether line will automatically pull the wedging means downwards and expand the collet. But when the tether line is under tension the collet is locked in its expanded state since it is only free to expand when the collet is spaced from the locking surface at the mouth of the anchoring chamber.
- a marine tether anchoring device comprising
- an anchoring chamber for installation in the seabed having a mouth that provides a locking surface
- a tether line having an enlarged lower end that is insertable through said mouth into said anchoring chamber
- a collet that surrounds the lower end of the tether line and has upwardly facing segments that in a retracted state pass said mouth of said anchoring chamber and in an expanded state latch at their tips behind said mouth of said anchoring chamber;
- wedging means relative to which the collet moves axially to expand said segments, said wedging means providing a load path between said enlarged lower end of said tether line and said collet so that in the latched position the expanded lower end of the tether line is located below the tips of the collet segments and tension in the tether line is transmitted from said expanded portion as a compressive load through said wedging means and said tips of said collet segments to said mouth of said anchoring chamber.
- the aforesaid anchoring device has the advantage that the major load-carrying components other than the tether line are in compression, giving a very high intrinsic safety level, and the load line is very short and straight.
- FIG. 1 is a cut-away view of a marine tether anchoring device
- FIG. 2 is a part-sectional elevation of the device in an operational or locked condition
- FIG. 3 is a sectional elevation of one half of the device in a release condition and with the tether line at an angle to the vertical.
- an anchor body 1 extends upwards to a locking ring 20 to which it is secured by means of studs 14.
- the ring 20 has on its exterior an upper frustoconical surface 21 of larger diameter and a lower frustoconical surface 22 of smaller diameter interconnected by a surface 23.
- the interior surface of ring 20 is connected by a so-called flexijoint assembly 37 of elastomer and metal to a flared lower end 24a of a tether line 24.
- the end 24a has a cup-shaped inner surface that is supported by a spherical seat 4 bolted to the body 1.
- the purpose of the flexijoint assembly which is resiliently deformable is to permit limited angular movement of the tether line 24 relative to the anchor body 1 as shown in FIG. 3.
- the body 1 has a series of radial fins 26 that support a cam ring 9 and an abrasion ring 10.
- a spring collet 2 surrounds the body 1 and extends from a base 27 at its lower end to flanged fingers 28 at its upper end.
- the fins 26 protrude through slots defined between adjacent fingers 28.
- the hooked upper ends of the fingers 28 either engage the upper surface 21 or define a radially expanded state of the fingers 28 or engage the lower surface 22 to define a collapsed state thereof.
- the top ends of the fingers 28 are also formed with bearing surfaces 29.
- the tether line 24 is formed with a central passage that communicates with an axial bore 36 through the seat 4. Fluid under pressure pumped down the central passage presses on the top face of a piston or so-called “thrust column” 11 that is supported in the body 1 in upper and lower bearings 8, 7 and terminates at its lower end in a flange 12.
- the structure that is secured to the seabed includes a mooring sleeve 30 having an abutment ring 31 at its upper end.
- a so-called template insert 38 that defines an anchoring chamber is a loose fit within the mooring sleeve 30 and has at its upper end a locking ring 3 that seats against the abutment ring 31 so that the template insert cannot be withdrawn from the mooring sleeve. According the template insert 38 can move up and down within the mooring sleeve 30 between its operational (FIG. 2) and release (FIG. 3) states but is permanently retained.
- the mooring sleeve 30 is provided with internal guide ribs 50 that locate the template insert, and similarly the template insert 38 is provided with guide ribs 51 that locate the assembly of anchor body and collet.
- a buffer 39 at the lower end of the collet 2 locates against a support 40 on the floor of the template insert to arrest downward travel of the anchor body and collet.
- FIG. 3 the anchoring device is shown in an unlocked condition with the template insert 38 at its release position within the mooring sleeve 30 so that locking ring 3 is spaced from abutment ring 31.
- the tether line is lowered so that the assembly of anchor body 1 and collet 2 enters the template insert 38.
- the collet is maintained in its collapsed state by the cam ring 9 that fits over an external shoulder 17 on the collet.
- the assembly moves downwards until the buffer 39 touches the support 40 after which no further downward movement of the collet 2 takes place.
- the anchor body 1 continues to move downwardly unde the weight of the tether line 24, disengaging ring 9 from shoulder 17 to permit partial expansion of the collet which is then fully expanded as fingers 28 travel over surface 23 of the locking ring until their hooked ends locate onto its upper surface 21.
- the base 27 of the collet thrusts the column or piston 11 from the position shown in FIG. 3 upwardly to the position shown in FIG. 2.
- the device reaches its locked state.
- tension is applied to the tether line 24 the body 1 rises taking the collet 2 upwards with it until the surface 21 engages the corresponding surface of the template insert. Thereafter the end .[.23.].
- the procedure for unlocking the device is as follows. Tension is removed from the tether line 24 to allow the template insert 38 to move downwards, normally under its own weight from the position shown in FIG. 2 an the body 1 and collet 2 to move downwardly into the template insert. Then fluid is pumped down the interior of the line 24 and flows through the central hole 36 in spherical seat 4 and drives the piston or thrust column 11 downwardly. This forces the collet 2 downwards disengaging fingers 28 from the upper surface 21 of the locking ring. Continued downward movement of the collet causes the ramp 16 to travel past cam ring 9 which finally engages the shoulder 17 to retain the collet in its fully collapsed state in which the fingers 28 engage lower surface 22 of the locking ring 20. The collet 2 will then pass out of the template insert 38 when tension is again applied to the tether line 24.
- planar mating surfaces 21 between the locking ring 20 and the fingers 28 in the locked condition is preferably at approximately 45° to the axis of the body 1.
Abstract
Description
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/675,598 USRE32274E (en) | 1980-11-06 | 1984-11-28 | Marine tether anchoring device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8035742 | 1980-11-06 | ||
US06/675,598 USRE32274E (en) | 1980-11-06 | 1984-11-28 | Marine tether anchoring device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06315603 Reissue | 1981-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE32274E true USRE32274E (en) | 1986-11-04 |
Family
ID=10517141
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/315,603 Ceased US4459933A (en) | 1980-11-06 | 1984-10-30 | Marine tether anchoring device |
US06/675,598 Expired - Fee Related USRE32274E (en) | 1980-11-06 | 1984-11-28 | Marine tether anchoring device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/315,603 Ceased US4459933A (en) | 1980-11-06 | 1984-10-30 | Marine tether anchoring device |
Country Status (5)
Country | Link |
---|---|
US (2) | US4459933A (en) |
JP (1) | JPS57164883A (en) |
FR (1) | FR2493260B1 (en) |
GB (1) | GB2087330B (en) |
NO (1) | NO153840C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0328196A1 (en) * | 1988-02-12 | 1989-08-16 | AGIP S.p.A. | Improved reversible mechanical coupling, particularly for tensional anchorages |
US5039255A (en) * | 1990-11-13 | 1991-08-13 | Conoco Inc. | Termination for kinkable rope |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2087330B (en) * | 1980-11-06 | 1984-05-16 | Vickers Ltd | Marine anchor tethering device |
US4439055A (en) * | 1982-01-25 | 1984-03-27 | Vetco Offshore, Inc. | Anchor connector |
IT1210110B (en) * | 1984-07-09 | 1989-09-06 | Tecnomare Spa | REVERSIBLE MECHANICAL JOINT FOR TENSION ANCHORAGES. |
FR2573831B1 (en) * | 1984-11-27 | 1987-01-02 | Alsthom Atlantique | MECHANICAL CONNECTION DEVICE FOR CONNECTING A SUBSTANTIALLY VERTICAL TRACTION LINE TO AN ANCHOR POINT |
US4611953A (en) * | 1985-11-01 | 1986-09-16 | Vetco Offshore Industries, Inc. | TLP tendon bottom connector |
GB2200880B (en) * | 1987-01-12 | 1990-07-11 | Brown And Root Vickers Technol | Marine tethering anchoring device |
US4780026A (en) * | 1987-03-31 | 1988-10-25 | Exxon Production Research Company | Tension leg platform and installation method therefor |
US4907914A (en) * | 1987-05-11 | 1990-03-13 | Exxon Production Research Company | Tether connector for a tension leg platform |
IT1214271B (en) * | 1987-08-07 | 1990-01-10 | Tecnomare Spa | JOINTED REVERSIBLE MECHANICAL JOINT AND RELATIVE SEAT, FOR TENSION ANCHORAGES. |
US5324141A (en) * | 1987-10-06 | 1994-06-28 | Conoco Inc. | Mooring apparatus and method of installation for deep water tension leg platform |
AU638209B2 (en) * | 1988-05-20 | 1993-06-24 | Shell Oil Company | Rotating lug anchor connector |
NO166626C (en) * | 1988-06-29 | 1991-08-21 | Kvaerner Brug Kjoleavdelning | DEVICE FOR ANCHORING THE STAGES OF A MARINE STRUCTURE ANCHORING PLATFORM IN A FOUNDATION ON THE SEA. |
US5114276A (en) * | 1990-03-08 | 1992-05-19 | Union Oil Company Of California, Dba Unocal | Apparatus and method for mooring a floating vessel |
US6036404A (en) * | 1993-08-31 | 2000-03-14 | Petroleo Brasileiro S.A.-Petrobras | Foundation system for tension leg platforms |
BR9303646A (en) * | 1993-08-31 | 1995-04-25 | Petroleo Brasileiro Sa | Foundation system for tilt leg platforms |
WO1995029780A2 (en) | 1994-05-02 | 1995-11-09 | Shell Internationale Research Maatschappij B.V. | A method for templateless foundation installation of a tlp |
GB2324779A (en) * | 1996-02-16 | 1998-11-04 | Petroleum Geo Services As | Tension-leg platform with flexible tendons and process for installatio |
BR9707451A (en) * | 1996-02-16 | 1999-07-20 | Petroleum Geo Services As | Stop chain locking mechanism for tension leg platform pull cables |
US5873678A (en) * | 1996-12-23 | 1999-02-23 | Continental Emsco Company | Tension adjustment mechanism employing stepped or serrated ramps for adjusting tension of a tendon from a floating marine platform |
US6241440B1 (en) * | 1998-06-15 | 2001-06-05 | Harken, Inc. | Device for tethering a fitting to a flat surface |
NO311686B1 (en) * | 1998-08-13 | 2002-01-07 | Kvaerner Oilfield Prod As | Connector designed for use on tensioning platform |
US7621698B2 (en) * | 2007-10-03 | 2009-11-24 | Vetco Gray Inc. | Rotating lock ring bottom tendon connector |
FR2959476A1 (en) * | 2010-05-03 | 2011-11-04 | Techlam | SUBMARINE CONNECTOR FOR CONNECTING A PETROLEUM SYSTEM WITH AN ANTI-DISCONNECT DEVICE |
GB2497953A (en) * | 2011-12-22 | 2013-07-03 | Subsea Riser Products Ltd | Preloaded Mooring Connector |
CN105805104B (en) * | 2014-12-30 | 2017-12-01 | 中国科学院深圳先进技术研究院 | Energy storage type tripper and energy storage type unlocking method |
WO2021133244A1 (en) * | 2019-12-23 | 2021-07-01 | Blue Capital Pte. Ltd. | Quick lock and unlock lifting system |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3199906A (en) * | 1963-07-05 | 1965-08-10 | Baker Oil Tools Inc | Releasable fluid control apparatus for retrieving subsurface well devices |
US3429286A (en) * | 1967-03-23 | 1969-02-25 | Aldo Alghisi | Lifting device |
US3560032A (en) * | 1968-05-27 | 1971-02-02 | Ltv Ling Altec Inc | Adjustable clutch for relatively moving tubular parts |
US3638988A (en) * | 1969-10-27 | 1972-02-01 | Cicero C Brown | Latch assembly for well tools |
GB1341373A (en) * | 1971-12-01 | 1973-12-19 | Westinghouse Electric Corp | Mooring system |
US3999605A (en) * | 1976-02-18 | 1976-12-28 | Texas Iron Works, Inc. | Well tool for setting and supporting liners |
US4347012A (en) * | 1978-10-07 | 1982-08-31 | Fmc Corporation | Method and apparatus for tension setting and compression releasing tubular connectors |
US4432670A (en) * | 1980-10-01 | 1984-02-21 | Armco Inc. | Combination connector and flex joint for underwater tension elements |
US4439055A (en) * | 1982-01-25 | 1984-03-27 | Vetco Offshore, Inc. | Anchor connector |
US4459933A (en) * | 1980-11-06 | 1984-07-17 | Vickers Limited | Marine tether anchoring device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB992347A (en) * | 1962-10-10 | 1965-05-19 | Otis Eng Co | Well head assembly |
GB2033463B (en) * | 1978-10-07 | 1982-06-16 | Fmc Corp | Method and apparatus for releasably connecting together two objects |
GB2035240A (en) * | 1978-11-15 | 1980-06-18 | British Petroleum Co | Offshore structures |
-
1981
- 1981-10-26 GB GB8132218A patent/GB2087330B/en not_active Expired
- 1981-11-05 NO NO813746A patent/NO153840C/en unknown
- 1981-11-05 JP JP56176593A patent/JPS57164883A/en active Granted
- 1981-11-06 FR FR8120865A patent/FR2493260B1/en not_active Expired
-
1984
- 1984-10-30 US US06/315,603 patent/US4459933A/en not_active Ceased
- 1984-11-28 US US06/675,598 patent/USRE32274E/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3199906A (en) * | 1963-07-05 | 1965-08-10 | Baker Oil Tools Inc | Releasable fluid control apparatus for retrieving subsurface well devices |
US3429286A (en) * | 1967-03-23 | 1969-02-25 | Aldo Alghisi | Lifting device |
US3560032A (en) * | 1968-05-27 | 1971-02-02 | Ltv Ling Altec Inc | Adjustable clutch for relatively moving tubular parts |
US3638988A (en) * | 1969-10-27 | 1972-02-01 | Cicero C Brown | Latch assembly for well tools |
GB1341373A (en) * | 1971-12-01 | 1973-12-19 | Westinghouse Electric Corp | Mooring system |
US3999605A (en) * | 1976-02-18 | 1976-12-28 | Texas Iron Works, Inc. | Well tool for setting and supporting liners |
US4347012A (en) * | 1978-10-07 | 1982-08-31 | Fmc Corporation | Method and apparatus for tension setting and compression releasing tubular connectors |
US4432670A (en) * | 1980-10-01 | 1984-02-21 | Armco Inc. | Combination connector and flex joint for underwater tension elements |
US4459933A (en) * | 1980-11-06 | 1984-07-17 | Vickers Limited | Marine tether anchoring device |
US4439055A (en) * | 1982-01-25 | 1984-03-27 | Vetco Offshore, Inc. | Anchor connector |
Non-Patent Citations (2)
Title |
---|
UK Patent App. #2035240A, 6/18/1980, Barrett et al. |
UK Patent App. 2035240A, 6/18/1980, Barrett et al. * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0328196A1 (en) * | 1988-02-12 | 1989-08-16 | AGIP S.p.A. | Improved reversible mechanical coupling, particularly for tensional anchorages |
US5039255A (en) * | 1990-11-13 | 1991-08-13 | Conoco Inc. | Termination for kinkable rope |
Also Published As
Publication number | Publication date |
---|---|
US4459933A (en) | 1984-07-17 |
JPH0217393B2 (en) | 1990-04-20 |
FR2493260B1 (en) | 1986-06-06 |
NO813746L (en) | 1982-05-07 |
FR2493260A1 (en) | 1982-05-07 |
GB2087330A (en) | 1982-05-26 |
NO153840B (en) | 1986-02-24 |
NO153840C (en) | 1986-06-04 |
JPS57164883A (en) | 1982-10-09 |
GB2087330B (en) | 1984-05-16 |
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Legal Events
Date | Code | Title | Description |
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FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M170); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
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AS | Assignment |
Owner name: BROWN & ROOT VICKERS TECHNOLOGY LIMITED, 7 HANOVER Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:VICKERS PUBLIC LIMITED COMPANY;REEL/FRAME:004762/0319 Effective date: 19870706 |
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Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 97-247 (ORIGINAL EVENT CODE: M174); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |