US20090056936A1 - Subsea Structure Load Monitoring and Control System - Google Patents
Subsea Structure Load Monitoring and Control System Download PDFInfo
- Publication number
- US20090056936A1 US20090056936A1 US12/174,166 US17416608A US2009056936A1 US 20090056936 A1 US20090056936 A1 US 20090056936A1 US 17416608 A US17416608 A US 17416608A US 2009056936 A1 US2009056936 A1 US 2009056936A1
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- US
- United States
- Prior art keywords
- load
- induced
- subsea structure
- sensor
- loads
- 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.)
- Abandoned
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/04—Manipulators for underwater operations, e.g. temporarily connected to well heads
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/013—Connecting a production flow line to an underwater well head
Definitions
- Loop currents impart loads and deflections onto subsea structures such as blow-out preventors (BOPs) and risers such that the ability to connect and disconnect a BOP to and from a wellhead is hampered.
- the current may deflect the hanging riser and BOP system away from vertical to a degree that the BOP cannot be latched to the wellhead.
- the BOP is already latched when the current loads are induced, there is no way of knowing what effect those forces will have on the BOP and riser once the connector is unlatched and the BOP is lifted off the connector. If the forces are sufficient, then the current may sweep the BOP and the riser into other equipment installed on the seafloor.
- FIG. 1 is an unscaled, side view of a remotely operated vehicle which has engaged a subsea structure to which a sensor array has been mounted;
- FIG. 2 is an unscaled, side view of a remotely operated vehicle which has been deployed to engage a subsea structure to which a sensor array has been mounted where the subsea structure is veering off of its intended deployment path;
- FIG. 3 is an unscaled, side view of a remotely operated vehicle which has engaged a subsea structure to which a sensor array has been mounted.
- the subsea structure load monitoring and control system described herein below allows the running of a subsea structure, e.g. a blowout preventer (BOP), in strong loop currents or other induced loads such as current-induced loads or loads induced by lateral displacement of a vessel away from a wellhead.
- a system for monitoring loads in such structures e.g. BOP connectors or risers, allows induced loads such as environmentally induced loads resulting from currents, vessel drift, and the like, or a combination thereof to be monitored and, once the loads are known, counteracted by inducing equal forces in the opposite direction.
- one or more sensors 20 is placed proximate a subsea structure, e.g. BOP connector 11 , preferably radially.
- sensors 20 simply measure the loads that are due to internal, normally-seen connector forces.
- Sensors 20 are typically strain sensors such as foil strain gauges manufactured by Vishay Intertechnology, Inc. of Malvern, Pa. or fiber optic strain gauges manufactured by Micron Optics Inc. of Atlanta, Ga.
- Sensors 20 interface with and are read by appropriate sensor electronics 22 .
- Sensor electronics 22 may be located on subsea structure 10 , lower marine riser package 14 , a remotely operated vehicle (ROV) 12 , a thruster package (not shown in the figures), or the like, or a combination thereof.
- ROV remotely operated vehicle
- load information obtained from sensors 20 is used to adjust the thrust output of ROV 12 or a thruster package so as to induce a load equal in force, but opposite in direction, to the induced loads such as current-induced loads.
- currents e.g. water currents
- ROV 12 is positioned to interface with coupler 5 .
- sensors 20 detect additional shear and bending loads on subsea structure 10 .
- Sensor electronics 22 communicates with ROV 12 , which then applies appropriate counter-forces to move subsea structure 10 back onto desired path 30 .
- subsea structure connector 11 can release subsea structure connector 11 and raise subsea structure 10 off of the wellhead without fear of subsea structure 10 or its associated riser, if any, being swept into other equipment.
- subsea structure 10 may stay vertical during the release and raise operation.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
A system for monitoring for loads in a subsea structure comprises one or more sensors disposed proximate a subsea structure such as a blow-out preventer. The sensors are configured to detect an induced load on a subsea structure. The detected load is communicated to a sensor data processor operatively in communication with the strain sensor. Using the detected load data, a load generator such as a remotely operated vehicle or other source of thrust has its thrust output adjusted to induce a load equal in force, but opposite in direction, to the detected induced loads.
Description
- The present application claims priority in part through U.S. Provisional Application 60/950,184 filed Jul. 17, 2007.
- Loop currents impart loads and deflections onto subsea structures such as blow-out preventors (BOPs) and risers such that the ability to connect and disconnect a BOP to and from a wellhead is hampered. The current may deflect the hanging riser and BOP system away from vertical to a degree that the BOP cannot be latched to the wellhead.
- If the BOP is already latched when the current loads are induced, there is no way of knowing what effect those forces will have on the BOP and riser once the connector is unlatched and the BOP is lifted off the connector. If the forces are sufficient, then the current may sweep the BOP and the riser into other equipment installed on the seafloor.
- At the current time, drilling operations are halted in strong loop current conditions.
- The attached figures illustrate various aspects of exemplary embodiments of the BOP Current Load Monitoring and Control System.
-
FIG. 1 is an unscaled, side view of a remotely operated vehicle which has engaged a subsea structure to which a sensor array has been mounted; -
FIG. 2 is an unscaled, side view of a remotely operated vehicle which has been deployed to engage a subsea structure to which a sensor array has been mounted where the subsea structure is veering off of its intended deployment path; and -
FIG. 3 is an unscaled, side view of a remotely operated vehicle which has engaged a subsea structure to which a sensor array has been mounted. - In its various embodiments, the subsea structure load monitoring and control system described herein below allows the running of a subsea structure, e.g. a blowout preventer (BOP), in strong loop currents or other induced loads such as current-induced loads or loads induced by lateral displacement of a vessel away from a wellhead. In the following exemplary embodiments, a system for monitoring loads in such structures, e.g. BOP connectors or risers, allows induced loads such as environmentally induced loads resulting from currents, vessel drift, and the like, or a combination thereof to be monitored and, once the loads are known, counteracted by inducing equal forces in the opposite direction.
- Referring now to
FIG. 1 , one ormore sensors 20 is placed proximate a subsea structure,e.g. BOP connector 11, preferably radially. Whensubsea structure 10 is connected with no induced loads,sensors 20 simply measure the loads that are due to internal, normally-seen connector forces. However, oncesubsea structure 10 is subjected to a lateral load,sensors 20 will detect additional shear and bending loads superimposed upon the normal loads.Sensors 20 are typically strain sensors such as foil strain gauges manufactured by Vishay Intertechnology, Inc. of Malvern, Pa. or fiber optic strain gauges manufactured by Micron Optics Inc. of Atlanta, Ga. -
Sensors 20 interface with and are read byappropriate sensor electronics 22.Sensor electronics 22 may be located onsubsea structure 10, lowermarine riser package 14, a remotely operated vehicle (ROV) 12, a thruster package (not shown in the figures), or the like, or a combination thereof. In any embodiment, load information obtained fromsensors 20 is used to adjust the thrust output ofROV 12 or a thruster package so as to induce a load equal in force, but opposite in direction, to the induced loads such as current-induced loads. - In the operation of a preferred embodiment, referring now to
FIG. 2 , currents, e.g. water currents, apply force on subsea structures such assubsea structure 10, causingsubsea structure 10 to move off of desiredpath 30.ROV 12 is positioned to interface withcoupler 5. - Referring now to
FIG. 3 , onceROV 12 has mated to coupler 5,sensors 20 detect additional shear and bending loads onsubsea structure 10.Sensor electronics 22 communicates withROV 12, which then applies appropriate counter-forces to movesubsea structure 10 back onto desiredpath 30. - Once the current load and the externally applied counter-force have been applied, an operator can release
subsea structure connector 11 and raisesubsea structure 10 off of the wellhead without fear ofsubsea structure 10 or its associated riser, if any, being swept into other equipment. For example,subsea structure 10 may stay vertical during the release and raise operation. - The foregoing disclosure and description of the inventions are illustrative and explanatory. Various changes in the size, shape, and materials, as well as in the details of the illustrative construction and/or a illustrative method may be made without departing from the spirit of the invention.
Claims (9)
1. A system for monitoring for loads in a subsea structure, comprising:
a. a sensor disposed proximate a subsea structure, the sensor configured to detect an induced load on a subsea structure; and
b. a sensor data processor operatively in communication with the strain sensor.
2. The system of claim 1 , wherein the induced load is at least one of a current-induced load or a load induced by lateral displacement of a vessel.
3. The system of claim 1 , wherein the sensor comprises a strain sensor.
4. The system of claim 1 , further comprising a load generator operatively in communication with the sensor data processor, the load generator operative to exert a force on the subsea structure in a direction opposed to a direction of a force detected by the strain sensor and in proportion to a load sensed by the strain sensor.
5. The system of claim 4 , wherein the load generator is selected from the group of load generators consisting of a remotely operated vehicle or a thrust package.
6. The system of claim 1 , wherein the sensor is a plurality of operatively interconnected strain sensors.
7. The system of claim 6 , wherein the plurality of strain sensors are disposed radially about the subsea structure.
8. A method of monitoring and counteracting subsea environmentally induced loads, comprising:
a. deploying a strain sensor proximate a subsea structure;
b. detecting an induced load on the subsea structure;
c. communicating the detected induced load to a load processor; and
d. using the detected load data to adjust thrust output of the load generator to induce a load equal in force, but opposite in direction, to the detected induced loads.
9. The method of claim 8 , wherein the induced load is selected from the group of induced loads comprising a current-induced load or a load induced by lateral displacement of a vessel away from a wellhead.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/174,166 US20090056936A1 (en) | 2007-07-17 | 2008-07-16 | Subsea Structure Load Monitoring and Control System |
PCT/US2008/070249 WO2009012349A1 (en) | 2007-07-17 | 2008-07-17 | Subsea structure load monitoring and control system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US95018407P | 2007-07-17 | 2007-07-17 | |
US12/174,166 US20090056936A1 (en) | 2007-07-17 | 2008-07-16 | Subsea Structure Load Monitoring and Control System |
Publications (1)
Publication Number | Publication Date |
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US20090056936A1 true US20090056936A1 (en) | 2009-03-05 |
Family
ID=40260059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/174,166 Abandoned US20090056936A1 (en) | 2007-07-17 | 2008-07-16 | Subsea Structure Load Monitoring and Control System |
Country Status (2)
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US (1) | US20090056936A1 (en) |
WO (1) | WO2009012349A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
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US7814856B1 (en) | 2009-11-25 | 2010-10-19 | Down Deep & Up, LLC | Deep water operations system with submersible vessel |
US20120037375A1 (en) * | 2010-07-15 | 2012-02-16 | Oceaneering International, Inc. | Emergency blowout preventer (ebop) control system using an autonomous underwater vehicle (auv) and method of use |
US20120247781A1 (en) * | 2011-03-29 | 2012-10-04 | Conocophillips Company | Subsea hydrocarbon recovery |
WO2014011823A1 (en) * | 2012-07-11 | 2014-01-16 | Schlumberger Canada Limited | Communication between downhole tool and surface location |
US9404347B1 (en) * | 2015-05-15 | 2016-08-02 | Baker Hughes Incorporated | Apparatus and method for connecting a riser from an offshore rig to a subsea structure |
US20160245867A1 (en) * | 2015-02-25 | 2016-08-25 | Onesubsea Ip Uk Limited | In-situ testing of subsea power components |
US20160312565A1 (en) * | 2015-04-23 | 2016-10-27 | Stylianos Papadimitriou | Autonomous blowout preventer |
WO2017019558A1 (en) * | 2015-07-24 | 2017-02-02 | Oceaneering International, Inc | Resident rov signal distribution hub |
US20170137092A1 (en) * | 2015-11-18 | 2017-05-18 | Cameron International Corporation | Safety System and Method for Guiding A Dropped Suspended Load Away From Equipment And To A Safe Landing Area |
US9719330B2 (en) * | 2015-12-28 | 2017-08-01 | Cameron International Corporation | Subsea equipment pendulum arrestor and method for its use |
US9739101B1 (en) * | 2016-07-13 | 2017-08-22 | Ensco International Incorporated | Riser deflection mitigation |
US9945909B2 (en) | 2015-02-25 | 2018-04-17 | Onesubsea Ip Uk Limited | Monitoring multiple subsea electric motors |
US10026537B2 (en) | 2015-02-25 | 2018-07-17 | Onesubsea Ip Uk Limited | Fault tolerant subsea transformer |
US20190063175A1 (en) * | 2015-04-23 | 2019-02-28 | Stylianos Papadimitriou | Autonomous blowout preventer |
WO2019079382A1 (en) * | 2017-10-17 | 2019-04-25 | Ensco International Incorporated | Riser and subsea equipment guidance |
US11499388B2 (en) * | 2015-04-23 | 2022-11-15 | Wanda Papadimitriou | Autonomous blowout preventer |
US20230045108A1 (en) * | 2021-07-22 | 2023-02-09 | China University Of Petroleum - Beijing | Method, device and system of vibration reduction control on installation of deepwater drilling riser |
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