EP1719842A1 - System and method for installing foundation elements - Google Patents
System and method for installing foundation elements Download PDFInfo
- Publication number
- EP1719842A1 EP1719842A1 EP05103713A EP05103713A EP1719842A1 EP 1719842 A1 EP1719842 A1 EP 1719842A1 EP 05103713 A EP05103713 A EP 05103713A EP 05103713 A EP05103713 A EP 05103713A EP 1719842 A1 EP1719842 A1 EP 1719842A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- driver
- hydraulic
- piston
- foundation element
- 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.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
- E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention pertains to a system (1) for installing foundation elements, such as piles or conductors (2), in a sub-sea ground formation (3), comprising a hydraulic driver (8) and a power converter (9) for generating hydraulic pressure in a hydraulic fluid for the driver (8). The driver (8) and the converter (9) are adapted to fit inside the foundation elements (2).
Description
- The invention pertains to a system for installing foundation elements, such as piles or conductors, in a sub-sea ground formation, comprising a hydraulic driver and a power converter for generating hydraulic pressure in a hydraulic fluid for the driver. The invention also relates to a method of installing foundation elements.
-
US 4,964,473 relates to a method for driving a hydraulic submerged tool, whereby the hydraulic pressure energy is generated in a submerged power converter. As explained inUS 4,964,473 , such a method was already known in the art, i.e. from theNetherlands patent application Nr. 7513240 - The latter document discloses a hydraulically driven pile driver to which an electrically driven hydraulic power unit is attached in which electric power is converted into hydraulic power. Feeding this power converter occurs by supplying electric energy by electric cables to the power converter from a generator located above water ashore, or on a ship or on a work platform. In the same way other submerged tools are driven, such as drilling tools, sampling apparatuses and tools for working at or inspecting submarine constructions.
- The electrical cables are uncoiled from a reel on deck to follow the power converter lowered below the water. For work ships with their restricted deck space and hoisting capacity suchlike reels with cables and diesel-electric power units are very aggravating.
- Further, with an increase of the depth on which has to be worked, extension of the electric cables is almost impossible or very complicated, because in most cases these are combined cables for electrical power, electrical signals and air supply. These cables moreover are rather heavy, costly and vulnerable.
- The invention underlying
US 4,964,473 aims to provide a method as well as a device for driving a hydraulic submerged tool with which these problems can be solved in an easy way. According toUS 4,964,473 , this object is obtained by driving the converter with pressurised surrounding water, which, after the energy transfer, is exhausted into the surrounding water. Herewith a simple drive is obtained whereby no return conduct is necessary. Especially with drilling ships in which high-pressure sea water pumps are already present and in which the drilling pipe composed of sections also can be used for transporting the pressurised sea water, this method will give a considerable cost reduction, whereas the working depth may be very large. - It is an object of the present invention to improve the system according to the opening paragraph.
- To this end, the system according to the present invention is characterised in that the driver and the converter are adapted to fit inside the foundation elements.
- This system enables so-called "pile toe driving" without the need for an umbilical between the converter and the driver.
- Typically, hydraulic pile drivers are connected to a tank for a hydraulic fluid and comprise a hydraulic cylinder, a piston accommodated in the hydraulic cylinder, an impact weight connected to the piston, high and low-pressure accumulators, a valve system for alternately connecting the hydraulic cylinder to the high and low-pressure accumulators, and conduits for operatively connecting these components in a manner known in itself.
- It is preferred that the tank is mounted on or integrated with the converter. It is also preferred that the cylinder, piston, accumulators, and the valve system are mounted on or integrated with the converter.
- By integrating one or more components of the driver with the converter, preferably most or all components except for the impact weight, handling of the system is simplified, a housing for the weight may be omitted and/or tolerances and shape of the weight become less critical.
- To isolate the weight, it is preferred that it is connected to the piston by means of a flexible element.
- The invention further relates to a method of installing foundation elements, such as piles or conductors, in a sub-sea ground formation, by means of a hydraulic driver and a power converter for generating hydraulic pressure in a hydraulic fluid for the driver, which method comprises the steps of (in no particular order)
mounting the driver inside a foundation element and subsequently mounting the converter inside the foundation element,
lowering the foundation element, the driver, and the power converter from a vessel, such as an drilling platform or ship, and preferably by means of a drill string. - It is preferred that an energy transferring fluid, in particular water taken from the surroundings of the drilling platform or ship, is fed to the converter through the drill string.
- It is noted that
WO 2004/051004 discloses a "pile-driving apparatus comprising a pile, a shoe tip coupled to a toe of the pile, and a drill string disposed within the pile. The drill string comprises a gripping device coupling the drill string to the pile and a hammer deployed into the pile such that the hammer is capable of transmitting a force to the shoe tip." The hammer receives fluid to generate the force, used to drive the shoe tip, and controlling signals via an umbilical. - Further,
US 6,626,248 discloses a "method for driving a drive pipe into a sub-sea formation, said method comprising: accelerating at least one mass relative to the drive pipe, wherein the at least one mass is accelerated within the drive pipe; transferring energy from the accelerated at least one mass to the drive pipe; suspending the drive pipe from a drill string; and isolating [by means of a "running tool"] the drill string from the transferred energy from the accelerated at least one mass." - The invention will now be explained in more detail with reference to the figures, which show a preferred embodiment of the system according to the present invention.
- Figure 1 schematically shows a system according to the present invention suspended from drilling platform by means of a drill string.
- Figure 2 is an enlarged view of the system shown in Figure 1.
- It is noted that the drawings are not necessarily to scale and that details, which are not required for understanding the present invention, may have been omitted.
- The Figures show a
system 1 for installing foundation elements, such as tubular piles orconductors 2, in aseabed 3, suspended from adrilling platform 4 by means of a hose or, preferably, adrill string 5. - In this example, the foundation element is a so-called
conductor pipe 2, i.e. a hollow metal tube, which typically has a length in a range from 50 to 125 m or even up to 250 m (in deep water) and a diameter in a range from 70 to 100 cm, for instance 30 or 36 inch. Near its bottom, theconductor pipe 2 is provided with a drive shoe 6 and a toe drive assembly, a steel plate or asolid steel anvil 7. - The
system 1 comprises ahydraulic driver 8 and apower converter 9 for generating hydraulic pressure in a hydraulic fluid and supplying the same to thedriver 8, which both fit inside theconductor pipe 2. - The
driver 8 comprises atank 10 for hydraulic fluid, such as hydraulic oil or (sea)water optionally including appropriate additives, ahydraulic cylinder 11, apiston 12 reciprocatingly accommodated in thehydraulic cylinder 11, high and low-pressure accumulators valve system 15 for alternately connecting thehydraulic cylinder 11 to the high and low-pressure accumulators impact weight 17. Further, anacceleration chamber 16 is positioned above thepiston 12 and connected to thevalve system 15. - In accordance with a preferred aspect of the present invention, the
impact weight 17 has been separated from the other components 10-15 of thedriver 8 and has been adapted to reciprocate inside theconductor pipe 2. Theimpact weight 17 comprises a plurality ofguides 18, preferably mounted along the circumference of theimpact weight 17 and at least at or near its upper and lower ends. Theguides 18 abut the inner wall of thefoundation element 2 and are preferably made of a synthetic material, such as HDPE, or a metal, such as brass. Theguides 18 eliminate nearly all wear on theimpact weight 17 and allow theweight 17 to work at inclinations. - The
impact weight 17 is connected to the lower end of thepiston 12 by means of aflexible element 19, e.g. a steel cable, and a shock absorber 20. - The
converter 9 preferably comprises a so-calledmud motor 21, afluid inlet 22, connected to thedrill string 5, such that a fluid, in particular seawater taken from the surroundings of thedrilling platform 4, can be fed through thedrill string 5 to theconverter 9, and apump 23 connected to the high-pressure accumulator 13 and thevalve system 15. Further,conduits pressure accumulator 14 to thetank 10 and thepump 23 to thetank 10 and the high-pressure accumulator 13, respectively. - The
mud motor 21, e.g. a Moyno 962M3460 or a 212R5625 ex Roper pumps, is known in itself and comprises a power section, connected, via thefluid inlet 22, to thedrill string 5, a transmission, and an output shaft connected to thepump 23. - In an alternative embodiment (not shown), mostly suitable for foundation elements having a large diameter, the converter comprises one or more work cylinders, which each by means of a floating piston are divided in a space filled with pressurised water and a space filled with a hydraulic work medium, switching means being provided which are activated each time that a floating piston reaches the end of its work stroke, by reason of which at each work cylinder the space which can be filled with pressurised water alternately is connected either to a feed conduit of pressurised water, in particular the
drill string 5, or to a free exhaust (not shown), each work cylinder at the side of the hydraulic work medium being connected to thepressure conduit 25 running to the high-pressure accumulator 13. With this relatively simple device, a practically loss free energy conversion is realized. Further details on this type of converter can be found inUS 4,964,473 , which is incorporated herein by reference. - In the preferred embodiment shown in the Figures, the tank, cylinder, piston, accumulators, and valve system have been integrated with the converter to form a
converter driver unit 26. An expandable ring, for instance a so-calledpacker 27, or a gripper has been attached about the circumference of theunit 26, e.g. halfway or at both the upper and lower ends of theunit 26, to temporarily secure theunit 26 to the inner wall of thefoundation element 2. Optionally, thering 27 and theanvil 7 provide air tight seals, in which case water below theunit 26 can be replaced by e.g. air thus reducing the resistance on theimpact weight 17 during reciprocating movement inside thefoundation element 2. - The
conductor pipe 2 is installed in theseabed 3, by lowering theconductor pipe 2 from theplatform 4 into the sea, mounting theimpact weight 17 and theconverter driver unit 26 inside thepipe 2, attaching the converter driver unit to the drill string, securing the latter against the inner wall of thepipe 2 by expanding thering 27 and/or connecting thepipe 2 to thedrill string 5 by means of (W)ROV disconnectable slings, lowering the assembly thus obtained from thedrilling platform 4 by means of thedrill string 5, and positioning theconductor pipe 2 on theseabed 3. - The operating cycle begins with an upward movement involving the lifting of the
piston 12 and theimpact weight 17. A first valve (within the valve system 15) in the high-pressure line (25) is opened and a second valve in the return line (24) is closed. Once a preset stroke has been reached, the first valve is closed and the second valve opened, allowing theimpact weight 17 to start its downward movement. In this example, theflexible element 19 is sufficiently short to enable thepiston 12 to abut and hence accelerate theimpact weight 17 during downward movement by connecting thechamber 16 above thepiston 12 to the high-pressure line, giving the impact weight 17 a total acceleration of up to 2 g. This reduces the actual stroke required and increases the blow rate. At impact the weight strikes theanvil 7 and thepipe 2 is driven into theseabed 3. - From the above examples, it will be clear that system according to the invention enables so-called "pile toe driving" without the need for an umbilical between the converter and the driver. Further, by integrating one or more components of the driver with the converter, preferably most or all components except for the impact weight, handling of the system is simplified, a housing for the weight may be omitted and/or tolerances and shape of the weight become less critical.
- The invention is not restricted to the above-described embodiments, which can be varied in a number of ways within the scope of the claims. For instance, the impact weight (17) may be rigidly connected to the piston (12). The means (27) for securing the converter driver unit to the inner wall of the foundation element can be employed to absorb torque generated in the converter, thus reducing or even preventing torque in the drill string.
- Also, the converter may comprise two or more pumps, e.g. two main pumps driven in opposite directions (again, reducing torque) and a pump for driving a jet for removing obstacles in the way of the impact weight.
- Further, the converter and driver can be configured as separate units, preferably connected by a flexible element and suitable conduits for the hydraulic fluid and/or each provided with a means for securing the same to the inner wall of the foundation element.
Claims (13)
- System (1) for installing foundation elements, such as piles or conductors (2), in a sub-sea ground formation (3), comprising a hydraulic driver (8) and a power converter (9) for generating hydraulic pressure in a hydraulic fluid for the driver (8), characterised in that the driver (8) and the converter (9) are adapted to fit inside the foundation elements (2).
- System (1) according to claim 1, comprising a tank (10) for a hydraulic fluid, which tank (10) is mounted on or integrated with the converter (9).
- System (1) according to claim 1 or 2, comprising a hydraulic cylinder (11), a piston (12) accommodated in the hydraulic cylinder (11), high and low-pressure accumulators (13, 14), and a valve system (15) for alternately connecting the hydraulic cylinder (11) to the high and low-pressure accumulators (13, 14), wherein the cylinder (11), piston (12), accumulators (13, 14), and valve system (15) are mounted on or integrated with the converter (9; 26).
- System (1) according to any one of the preceding claims, comprising an impact weight (17) capable of reciprocating movement within a foundation element (2), which impact weight (17) is connected to the piston (11) by means of a flexible element (19).
- System (1) according to any one of the preceding claims, comprising an acceleration compartment located above the piston (11) and/or communicating with a chamber (16) above the piston (11).
- System (1) according to any one of the preceding claims, wherein the converter (9; 26) comprises a means for securing the converter (9; 16) and any components integrated therewith to the inner wall of the foundation element (2).
- System (1) according to any one of the preceding claims, wherein the converter (9; 26) comprises a fluid inlet adapted to be connected to a drill string (5), such that a fluid can be fed through the drill string (5) to the converter (9; 26).
- Method of installing foundation elements, such as piles or conductors (2), in a sub-sea ground formation (3), by means of a hydraulic driver (8) and a power converter (9) for generating hydraulic pressure in a hydraulic fluid for the driver (8), which method comprises the steps of
mounting the driver (8) inside a foundation element (2) and subsequently mounting the converter (9; 26) inside the foundation element (2),
lowering the foundation element (2), the driver (8), and the power converter (9) from a vessel (4). - Method according to claim 8, wherein the converter (9; 26) and any components integrated therewith is lowered by means of a drill string (5).
- Method according to claim 9, wherein and energy transferring fluid is fed to the converter (9; 26) through the drill string (5).
- Method according to any one of claims 8-10, wherein the driver (8) and the power converter (9) are positioned inside the foundation element (2) before lowering the foundation element (2), the driver (8), and the power converter (9) to the formation (3).
- Method according to any one of claims 8-11, fixing the converter (9; 26) and elements integrated therewith to the inner wall of the foundation element (2).
- Method according to any one of claims 8-12, wherein water below the converter (9; 26) is replaced by a gas, thus reducing the resistance on the impact weight (17) during reciprocating movement inside the foundation element (2).
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05103713A EP1719842A1 (en) | 2005-05-03 | 2005-05-03 | System and method for installing foundation elements |
US11/913,133 US20080292407A1 (en) | 2005-05-03 | 2006-05-03 | System and Method for Installing Foundation Elements |
EP06754973A EP1880060A1 (en) | 2005-05-03 | 2006-05-03 | System and method for installing foundation elements |
PCT/EP2006/062006 WO2006117380A1 (en) | 2005-05-03 | 2006-05-03 | System and method for installing foundation elements |
MX2007013707A MX2007013707A (en) | 2005-05-03 | 2006-05-03 | System and method for installing foundation elements. |
NO20075539A NO20075539L (en) | 2005-05-03 | 2007-11-02 | System and method for installing foundation elements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05103713A EP1719842A1 (en) | 2005-05-03 | 2005-05-03 | System and method for installing foundation elements |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1719842A1 true EP1719842A1 (en) | 2006-11-08 |
Family
ID=34979265
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05103713A Withdrawn EP1719842A1 (en) | 2005-05-03 | 2005-05-03 | System and method for installing foundation elements |
EP06754973A Withdrawn EP1880060A1 (en) | 2005-05-03 | 2006-05-03 | System and method for installing foundation elements |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06754973A Withdrawn EP1880060A1 (en) | 2005-05-03 | 2006-05-03 | System and method for installing foundation elements |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080292407A1 (en) |
EP (2) | EP1719842A1 (en) |
MX (1) | MX2007013707A (en) |
NO (1) | NO20075539L (en) |
WO (1) | WO2006117380A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103572758A (en) * | 2013-11-18 | 2014-02-12 | 天津理工大学 | Flexible sealing water hammer for driving pile in water |
CN106284350A (en) * | 2015-06-03 | 2017-01-04 | 毕建东 | The improved method of inner striking type hydraulic pile hammer and application thereof |
EP3146112A1 (en) * | 2014-05-22 | 2017-03-29 | IHC Holland IE B.V. | Tubular foundation |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2448358B (en) * | 2007-04-12 | 2009-07-08 | Tidal Generation Ltd | Installation of underwater ground anchorages |
EP2312060B1 (en) | 2009-10-16 | 2012-09-26 | IHC Holland IE B.V. | System for and method of installing foundation elements in an underwater ground formation |
NL2008279C2 (en) * | 2012-02-13 | 2013-08-14 | Ihc Holland Ie Bv | A template for and method of installing a plurality of foundation elements in an underwater ground formation. |
CN105064363A (en) * | 2015-08-17 | 2015-11-18 | 中机锻压江苏股份有限公司 | Deep sea underwater power hammer |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526283A (en) * | 1968-07-23 | 1970-09-01 | S O G Research & Dev Corp | Pile driver |
US3817335A (en) * | 1972-11-28 | 1974-06-18 | Bolt Associates Inc | Airgun repeater powered pile driver |
US4043405A (en) * | 1974-11-16 | 1977-08-23 | Koehring Gmbh | Pile-driving arrangement |
US4098355A (en) * | 1977-01-27 | 1978-07-04 | Raymond International Inc. | Underwater hammer with circumferential flow seal |
US4964473A (en) | 1988-03-15 | 1990-10-23 | Ihc Holland N.V. | Method for driving a hydraulic submerged tool |
US6626248B1 (en) | 1999-05-05 | 2003-09-30 | Smith International, Inc. | Assembly and method for jarring a drilling drive pipe into undersea formation |
WO2004051004A2 (en) | 2002-12-02 | 2004-06-17 | Bj Services Company | Method and apparatus for sub-sea pile-driving |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3646598A (en) * | 1969-06-25 | 1972-02-29 | Bolt Associates Inc | Pile driver systems apparatus and method for driving a pile |
FR2369908A1 (en) * | 1976-11-08 | 1978-06-02 | Montabert Roger | HYDRAULIC PERCUSSION DEVICE |
US4154307A (en) * | 1976-11-19 | 1979-05-15 | Raymond International, Inc. | Pile driving system |
GB2043510B (en) * | 1979-02-27 | 1982-12-22 | Hollandsche Betongroep Nv | Pile driving apparatus |
US4372707A (en) * | 1979-11-29 | 1983-02-08 | Pipe Technology Systems, Inc. | Pile installation and removal mechanisms in off-shore rigs and method of using same |
DE3047375C2 (en) * | 1980-12-16 | 1985-09-05 | Koehring Gmbh, 2000 Hamburg | Submersible pile driving device |
FR2802949B1 (en) * | 1999-12-22 | 2002-09-27 | Durmeyer Entrp Travaux Publics | ELECTROMAGNETIC HAMMER WITH MOBILE FERROMAGNETIC MASS |
US6962202B2 (en) * | 2003-01-09 | 2005-11-08 | Shell Oil Company | Casing conveyed well perforating apparatus and method |
-
2005
- 2005-05-03 EP EP05103713A patent/EP1719842A1/en not_active Withdrawn
-
2006
- 2006-05-03 EP EP06754973A patent/EP1880060A1/en not_active Withdrawn
- 2006-05-03 WO PCT/EP2006/062006 patent/WO2006117380A1/en active Application Filing
- 2006-05-03 US US11/913,133 patent/US20080292407A1/en not_active Abandoned
- 2006-05-03 MX MX2007013707A patent/MX2007013707A/en unknown
-
2007
- 2007-11-02 NO NO20075539A patent/NO20075539L/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526283A (en) * | 1968-07-23 | 1970-09-01 | S O G Research & Dev Corp | Pile driver |
US3817335A (en) * | 1972-11-28 | 1974-06-18 | Bolt Associates Inc | Airgun repeater powered pile driver |
US4043405A (en) * | 1974-11-16 | 1977-08-23 | Koehring Gmbh | Pile-driving arrangement |
US4098355A (en) * | 1977-01-27 | 1978-07-04 | Raymond International Inc. | Underwater hammer with circumferential flow seal |
US4964473A (en) | 1988-03-15 | 1990-10-23 | Ihc Holland N.V. | Method for driving a hydraulic submerged tool |
US6626248B1 (en) | 1999-05-05 | 2003-09-30 | Smith International, Inc. | Assembly and method for jarring a drilling drive pipe into undersea formation |
WO2004051004A2 (en) | 2002-12-02 | 2004-06-17 | Bj Services Company | Method and apparatus for sub-sea pile-driving |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103572758A (en) * | 2013-11-18 | 2014-02-12 | 天津理工大学 | Flexible sealing water hammer for driving pile in water |
CN103572758B (en) * | 2013-11-18 | 2015-04-29 | 天津理工大学 | Flexible sealing water hammer for driving pile in water |
EP3146112A1 (en) * | 2014-05-22 | 2017-03-29 | IHC Holland IE B.V. | Tubular foundation |
CN106284350A (en) * | 2015-06-03 | 2017-01-04 | 毕建东 | The improved method of inner striking type hydraulic pile hammer and application thereof |
Also Published As
Publication number | Publication date |
---|---|
NO20075539L (en) | 2007-12-03 |
US20080292407A1 (en) | 2008-11-27 |
WO2006117380A1 (en) | 2006-11-09 |
EP1880060A1 (en) | 2008-01-23 |
MX2007013707A (en) | 2008-04-09 |
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