AU2001270839A1 - Underwater tool - Google Patents
Underwater toolInfo
- Publication number
- AU2001270839A1 AU2001270839A1 AU2001270839A AU2001270839A AU2001270839A1 AU 2001270839 A1 AU2001270839 A1 AU 2001270839A1 AU 2001270839 A AU2001270839 A AU 2001270839A AU 2001270839 A AU2001270839 A AU 2001270839A AU 2001270839 A1 AU2001270839 A1 AU 2001270839A1
- Authority
- AU
- Australia
- Prior art keywords
- piston
- chamber
- tool
- sealing device
- seal member
- 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
Description
UNDERWATER TOOL
This invention concerns a tool for use in deep water, which tool consists of or includes a sealing device.
Such a tool, with a sealing device, may be used for recovery of pipelines from such great depths that all work has to be carried out by remotely operated vehicles, as opposed to divers. A number of known tools of this type use hydraulic pressure to operate the sealing device, whereby the tool fastens itself to a pipe section, for hauling same back to the surface. Obviously, these tools rely on having a hydraulic line from the surface to the tool, which may be on the sea bed.
An object of the present invention is to obviate the need for such a hydraulic line.
According to the present invention, in a sealing device of an underwater tool, external water pressure at depth can act on a piston, which is movable within a chamber, to cause it to compress a seal member.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a schematic sectional view of a pipe and of a sealing device according to the invention, which will locate in the pipe; and
Figure 2 is a perspective view of a pipeline recovery tool fitted with a sealing device similar to that shown in Figure 1.
Referring to Figure 1, the exemplary sealing device comprises a cylindrical housing (10) having a central through bore (12) . An annular chamber (14) is formed in the housing (10) and an annular piston (16) is axially slidable within this chamber (14) . The piston (16) is longitudinally shorter than the chamber (14) so that a space remains within the chamber at one or both ends of the piston (16) , depending on its position therein. Two O-ring seals (18) are provided between the piston (16) and the radially inner wall of the chamber (14), and similarly two O-ring seals (19) are provided between the piston (16) and the radially outer wall of the chamber (14) . A lateral extension (26) of the piston (16) projects into an opening in the housing (10) adjacent an annular sealing member (20) which may be of any conventional deformable packing material, such as rubber or synthetic rubber or substitutes therefor. Movement of the piston (16) in the direction indicated by arrow "A" causes its lateral extension (26) to compress and deform the sealing member (20) causing it to bulge outwardly. Thus, when the housing (10) is a close fit inside a
pipe section (30) , a tight seal can be created between the housing (10) and the pipe interior by movement of the piston (16) in the direction of arrow "A".
A first inlet in the form of a conduit (22) leads into one end of the chamber (14) from the exterior and is fitted with a first shut off valve (24) . A second inlet in the form of a conduit (28) leads into the opposing end of the chamber (14) from the exterior and is fitted with a second shut off valve (29).
At the surface, before submersion of the sealing device, the chamber (14) is filled with air at normal atmospheric pressure and the valves (24) and (29) are closed. The sealing device is then lowered to the sea bed and, by means of a remotely operated vehicle (not shown) , is manoeuvred into position inside the pipe section (30) awaiting recovery. The vehicle then opens the first valve (24) for about a minute to allow water through the conduit (22) into the first end of the chamber (14), thus moving the piston (16) in direction NA" and
1 compressing the seal (20) to engage the pipe (30) . The valve (24) is then closed to maintain the pressure on the seal (20) as the pipe (30) is recovered to the surface.
If it is necessary to disengage the sealing device housing (10), from the pipe (30) while the latter is still on or near
the sea bed, the vehicle can open both the valves (24) and (29) to allow water to enter via both the conduits (22) and (28) and equalise pressure at the respective ends of piston (16) . The seal (20) will then recover back to its original shape and size and .disengage the pipe (30) .
The sealing device housing (10) would then have to be returned to the surface for resetting of the piston (16), i.e. replenishing the chamber (14) with air and closing off the valves (24) and (29) again.
Figure 2 simply shows at (40) where a device such as that in Figure 1 can be incorporated in a larger Ballgrab recovery tool. Such a tool advantageously includes means for pumping water out of the pipe (30) via the throughbore (12), to aid its recovery. A check valve (32) in the bore (12) can be used to prevent backflow of water as it is pumped out.
The foregoing is illustrative and not limitative of the scope of the invention and many variations in detail are possible.
Claims (1)
- A tool for use under water comprising a sealing device wherein external water pressure at depth can act on a piston (16), which is movable within a chamber (14), to cause it to compress a seal member (20) .A tool according to claim 1 having a valve actuated inlet (22, 24) to the chamber (14) at a first end of the piston (16) whereby external water pressure may act on the piston to compress the seal member (20) .A tool according to claim 2 having a second valve actuated inlet (28, 29) to the chamber (14) at an opposing end of the piston (16) whereby external water pressure may act on the piston to release the seal member (20).A tool according to claim 1 , 2 or 3 wherein the seal member (20) is annular.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0017484.7 | 2000-07-17 | ||
GB0017484A GB2367107B (en) | 2000-07-17 | 2000-07-17 | Underwater tool |
PCT/GB2001/003192 WO2002006627A1 (en) | 2000-07-17 | 2001-07-12 | Underwater tool |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2001270839A1 true AU2001270839A1 (en) | 2002-05-02 |
AU2001270839B2 AU2001270839B2 (en) | 2006-03-02 |
Family
ID=9895786
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2001270839A Ceased AU2001270839B2 (en) | 2000-07-17 | 2001-07-12 | Underwater tool |
AU7083901A Pending AU7083901A (en) | 2000-07-17 | 2001-07-12 | Underwater tool |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU7083901A Pending AU7083901A (en) | 2000-07-17 | 2001-07-12 | Underwater tool |
Country Status (11)
Country | Link |
---|---|
US (1) | US6752569B2 (en) |
EP (1) | EP1301683B1 (en) |
AT (1) | ATE267949T1 (en) |
AU (2) | AU2001270839B2 (en) |
BR (1) | BR0112560B1 (en) |
CA (1) | CA2419231C (en) |
DE (1) | DE60103543T2 (en) |
ES (1) | ES2222384T3 (en) |
GB (1) | GB2367107B (en) |
NO (1) | NO327197B1 (en) |
WO (1) | WO2002006627A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6732762B2 (en) * | 2001-01-12 | 2004-05-11 | Larry R. Russell | Pressure-containing plug for a tubular passageway |
US7156169B2 (en) * | 2003-12-17 | 2007-01-02 | Fmc Technologies, Inc. | Electrically operated actuation tool for subsea completion system components |
US7445050B2 (en) * | 2006-04-25 | 2008-11-04 | Canrig Drilling Technology Ltd. | Tubular running tool |
US7552764B2 (en) * | 2007-01-04 | 2009-06-30 | Nabors Global Holdings, Ltd. | Tubular handling device |
US8720541B2 (en) | 2008-06-26 | 2014-05-13 | Canrig Drilling Technology Ltd. | Tubular handling device and methods |
US8074711B2 (en) | 2008-06-26 | 2011-12-13 | Canrig Drilling Technology Ltd. | Tubular handling device and methods |
US9797207B2 (en) * | 2011-01-21 | 2017-10-24 | 2M-Tek, Inc. | Actuator assembly for tubular running device |
CN110805405A (en) * | 2019-10-15 | 2020-02-18 | 中煤科工集团西安研究院有限公司 | Internal clamping type drill rod fishing tool and fishing method thereof |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3645563A (en) * | 1969-05-07 | 1972-02-29 | Brown & Root | Method and apparatus for making submerged pipeline connections |
US3817200A (en) * | 1971-04-19 | 1974-06-18 | Us Navy | Ambient pressure powered cable cutter |
US3751932A (en) * | 1972-02-16 | 1973-08-14 | Exxon Production Research Co | Recovery and repair of offshore pipelines |
US3777499A (en) * | 1972-06-14 | 1973-12-11 | Exxon Production Research Co | Offshore pipeline recovery |
US3842612A (en) * | 1972-09-20 | 1974-10-22 | Hydrotech Int Inc | Pipeline recovery tool and method |
IT983823B (en) * | 1973-04-13 | 1974-11-11 | Saipem Spa | EQUIPMENT CALLED SELF-LOCKING CAP FOR THE HERMETIC CLOSURE AND RECOVERY OF PIPES PLACED ON HIGH BOTTOMS |
FR2242657B1 (en) * | 1973-08-27 | 1976-05-07 | Petroles Cie Francaise | |
GB1498804A (en) * | 1974-04-10 | 1978-01-25 | British Petroleum Co | Pipeline tool |
US3931670A (en) * | 1974-04-25 | 1976-01-13 | Hydrotech International, Inc. | Apparatus and method for connecting two axially spaced apart pipes |
US4498811A (en) * | 1982-02-17 | 1985-02-12 | Mcdermott Incorporated | Underwater pipeline sealing apparatus |
US4772158A (en) * | 1986-02-18 | 1988-09-20 | Max Bassett | Method and apparatus for setting inflatable packers in deep water |
GB2214259A (en) * | 1988-01-04 | 1989-08-31 | Heerema Engineering | Pipeline recovery |
US4887931A (en) * | 1989-02-16 | 1989-12-19 | Baker Hughes Incorporated | Method and apparatus for towing subsea pipeline sections |
US5044827A (en) * | 1990-10-30 | 1991-09-03 | Diverless Systems, Inc. | Method for recovering wet buckled pipe |
US5188483A (en) * | 1991-07-25 | 1993-02-23 | Shell Oil Company | Subsea pipeline recovery clamp |
-
2000
- 2000-07-17 GB GB0017484A patent/GB2367107B/en not_active Expired - Fee Related
-
2001
- 2001-07-12 AU AU2001270839A patent/AU2001270839B2/en not_active Ceased
- 2001-07-12 AT AT01949720T patent/ATE267949T1/en not_active IP Right Cessation
- 2001-07-12 EP EP01949720A patent/EP1301683B1/en not_active Expired - Lifetime
- 2001-07-12 DE DE60103543T patent/DE60103543T2/en not_active Expired - Lifetime
- 2001-07-12 ES ES01949720T patent/ES2222384T3/en not_active Expired - Lifetime
- 2001-07-12 WO PCT/GB2001/003192 patent/WO2002006627A1/en active IP Right Grant
- 2001-07-12 CA CA002419231A patent/CA2419231C/en not_active Expired - Fee Related
- 2001-07-12 AU AU7083901A patent/AU7083901A/en active Pending
- 2001-07-12 BR BRPI0112560-5A patent/BR0112560B1/en not_active IP Right Cessation
-
2003
- 2003-01-16 NO NO20030221A patent/NO327197B1/en not_active IP Right Cessation
- 2003-01-16 US US10/345,673 patent/US6752569B2/en not_active Expired - Lifetime
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