EP3498968A1 - Auflassungsstopfen und auflassungssystem - Google Patents

Auflassungsstopfen und auflassungssystem Download PDF

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Publication number
EP3498968A1
EP3498968A1 EP17206810.8A EP17206810A EP3498968A1 EP 3498968 A1 EP3498968 A1 EP 3498968A1 EP 17206810 A EP17206810 A EP 17206810A EP 3498968 A1 EP3498968 A1 EP 3498968A1
Authority
EP
European Patent Office
Prior art keywords
plug
abandonment
piston
sleeve
unit
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Withdrawn
Application number
EP17206810.8A
Other languages
English (en)
French (fr)
Inventor
Jon Kræmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Welltec Oilfield Solutions AG
Original Assignee
Welltec Oilfield Solutions AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Welltec Oilfield Solutions AG filed Critical Welltec Oilfield Solutions AG
Priority to EP17206810.8A priority Critical patent/EP3498968A1/de
Priority to EP18826979.9A priority patent/EP3724442B1/de
Priority to CA3084273A priority patent/CA3084273A1/en
Priority to US16/215,995 priority patent/US11220879B2/en
Priority to DK18826979.9T priority patent/DK3724442T3/da
Priority to CN201880077614.6A priority patent/CN111417765A/zh
Priority to RU2020121362A priority patent/RU2799020C2/ru
Priority to AU2018385362A priority patent/AU2018385362B2/en
Priority to MX2020005469A priority patent/MX2020005469A/es
Priority to BR112020010108-7A priority patent/BR112020010108B1/pt
Priority to PCT/EP2018/084275 priority patent/WO2019115491A1/en
Publication of EP3498968A1 publication Critical patent/EP3498968A1/de
Withdrawn legal-status Critical Current

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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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
    • E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
    • 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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/134—Bridging plugs
    • 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
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like

Definitions

  • the present invention relates to an abandonment plug for plug and abandonment of a well and to a plug and abandonment system.
  • Plug and abandonment is an important part of the lifetime of a well. It is also a costly process since the authorities have high requirements for the plugging operations in order to ensure that the well does not pollute the environment. Most regulatory bodies require that cement plugs be placed and tested across any open hydrocarbon-bearing formations, across all casing shoes, across freshwater aquifers, and perhaps across several other areas near the surface, including the top 6 to 15 m of the wellbore.
  • bridge plugs in conjunction with cement slurries to ensure that higher density cement does not fall in the wellbore.
  • the bridge plug would be set and cement pumped on top of the plug through a drill pipe string, and then the drill pipe string would be withdrawn before the slurry thickened.
  • the plug is set and cement is pumped down through the plug, and thus the cement is arranged underneath the plug before the plug is permanently closed for flow-through.
  • Most of the plugs have complex designs for providing flow-through during insertion of the plug, and thus the plugs are provided with shear pins, pistons, sealing arrangement etc.
  • plug and abandonment When planning a well, costs for plug and abandonment have to be guaranteed, so that the authorities are not left with a large bill to pay for the plug and abandonment, and thus a well operator will always seek a lees expensive solution for plug and abandonment so that less money is to be guaranteed.
  • known plugs are expensive and some fail due to the complexity of the plug to provide flow-through, and subsequently the plug cannot close as intended and a new plug has to be inserted.
  • an abandonment plug for plug and abandonment of a well said abandonment plug comprising:
  • the abandonment plug according to the present invention may further comprise a first breakable element for maintaining the piston in the first position in relation to the unit sleeve until the breakable element breaks at a predetermined force.
  • the expandable metal sleeve may be mounted end to end to the first and second end parts.
  • the expandable metal sleeve may be the only element connecting the first end part and the second end part.
  • the expandable metal sleeve may have circumferential projections.
  • the expandable metal sleeve may have a sealing element arranged between two projections.
  • the piston may be tubular.
  • the piston may have a first piston part and a second piston part which are movable in relation to each other.
  • first piston part may be tubular and the second part may be bore-less.
  • the abandonment plug according to the present invention may further comprise a second breakable element between the unit sleeve and the second end part for maintaining the unit sleeve in the first position in relation to the second end part until the breakable element breaks at a predetermined force.
  • the unit sleeve may have a unit groove in which the radially projectable fastening element is arranged.
  • the unit sleeve may comprise sealing elements arranged between the unit sleeve and the second end part.
  • the piston may have a ball seat for receiving a ball dropped into the well.
  • the second end part may have an opening for receiving a wiper dart or ball to close the second end part.
  • the plug may be connected to a workover pipe, drill pipe, coiled tubing or similar disconnectable tubing.
  • the unit sleeve may have a through-bore in which the piston slides.
  • the abandonment plug may comprise a venting port in the second tubular end part for equalising the pressure within well while running in the plug.
  • the present invention also relates to a plug and abandonment system comprising the abandonment plug according to the present invention and a cement supply for supplying cement above the plug, below the plug and/or in the plug.
  • the plug and abandonment system according to the present invention may further comprise a stroking tool connected to the expansion unit for providing an axial force for expanding the expandable metal sleeve.
  • Said plug and abandonment system according to the present invention may furthermore comprise diconnectable tubing connecting the cement supply with the plug.
  • Fig. 1a shows an abandonment plug 1 for plug and abandonment of a well.
  • the abandonment plug 1 comprises a first end part 3 being closed and forming a bottom of the plug, and a second end part 4 being tubular and having a groove 5 in its inner face 6. The second end part is closest to the top of the well.
  • the abandonment plug 1 further comprises an expandable metal sleeve 7 arranged between the end parts, so that the expandable metal sleeve is the only element connecting the first end part and the second end part.
  • the end parts 3, 4 are more rigid than the expandable metal sleeve 7, so that when a pressurised fluid is applied, the expandable metal sleeve is radially expanded to permanently deform and conform to the borehole wall or to a well tubular metal structure, thereby forming a plug therein.
  • the abandonment plug 1 furthermore comprises an expansion unit 8 which is releasably connected within the second tubular end part.
  • the expansion unit comprises at least one radially projectable fastening element 9, a unit sleeve 10 and a piston 11 movable within the unit sleeve. The piston 11 moves between a first position, shown in Figs.
  • the piston 11 has a first piston part 16 and a second piston part 17.
  • the first piston part 16 and the second piston part 17 are separate pistons capable of moving in relation to each other.
  • the second piston part 17 is able to move downwards, and the fluid under the ball expands the expandable metal sleeve 7, as shown in Fig. 1c .
  • the abandonment plug 1 further comprises a first breakable element 12 for maintaining the first piston part 16 of the piston 11 in the first position, shown in Figs.
  • the expandable metal sleeve 7 is mounted end to end to the first and second end parts 3, 4, so that the expandable metal sleeve 7 is the only element connecting the first end part 3 and the second end part 4.
  • the expansion unit has been released and pulled out and the plug is ready for being filled with cement to place cement above the plug 1.
  • the expandable metal sleeve 7 has circumferential projections 14 and a sealing element 15 arranged between two projections to better seal against the borehole or within a well tubular metal structure.
  • the abandonment plug 1 is typically connected to a workover pipe, drill pipe (a drill pipe string), coiled tubing or similar disconnectable tubing in order to provide pressurised fluid from surface to expand the abandonment plug 1 and disconnect when the plug has been set.
  • the abandonment plug 1 is connected to a wireline tool having a pump for providing the pressurised fluid.
  • the piston 11 is tubular provided by a bore 36 and thus has a very simple design.
  • the piston of Figs. 1a-1d has a first piston part 16 and a second piston part 17 which are movable in relation to each other.
  • the first piston part 16 is tubular so that the ball can flow past, and the second piston part is bore-less so that the ball 22 can seat in a ball seat 21 in the second piston part 17 and the second piston part functions as the piston 11 enabling expansion of the expandable metal sleeve 7.
  • the abandonment plug 1 further comprises the second breakable element 18 between the unit sleeve 10 and the second end part 4 as a safety precaution for maintaining the unit sleeve in the first position in relation to the second end part during expansion of the expandable metal sleeve until the second breakable element 18 breaks at a predetermined force.
  • the second breakable element is easy to break by applying a downward force on the unit sleeve 10, e.g. by increasing the pressure, and the expansion unit 8 can thus always be easily retracted.
  • the unit sleeve 10 of Fig. 1a has a unit groove 19 in which the radially projectable fastening element 9 is arranged.
  • the unit sleeve 10 further comprises sealing elements 37 arranged between the unit sleeve 10 and the second end part 4.
  • the abandonment plug 1 of Figs. 2a-2e has an opening 23 in the second end part 4 for receiving a wiper dart 24 (or a ball) to close the second end part.
  • a wiper dart 24 or a ball
  • cement can be injected below the plug 1 before the expandable metal sleeve 7 is expanded and the plug set.
  • a wiper dart 24 is dropped and seats in the second end part 4, as shown in Fig. 2b , closing the second end part 4.
  • cement can be applied through a drill pipe string of drill pipe connected to the plug, and the expandable metal sleeve 7 is expanded as shown in Fig. 2c .
  • the first breakable element 12 is broken by the piston 11 moving slightly downwards, so that the radially projectable fastening element 9 is free to move radially inwards. This is due to the same pressure difference over the first piston part 16, as described in relation to Fig. 1a-1e .
  • the piston 11 and the unit sleeve 10 is moved downwards, breaking also the second breakable element 18, and the drill pipe/drill pipe string can be retracted together with the expansion unit 8, as shown in Fig. 2e , while pumping cement down the drill pipe and the expansion unit which then is applied above the plug if requested by the operator.
  • the plug 1 can thus be set in the middle of a cemented zone to contribute to the curing process in the intended position as this plug 1 can be applied with cement under, in and above the plug.
  • the piston 11 is one part only moving from the first position to the second position.
  • the unit sleeve 10 has a through-bore 26 in which the piston 11 slides as in Figs. 1a-1d and Figs. 2a-2d .
  • the unit sleeve 10 of the abandonment plug 1 of Figs. 3a-3d is connected to a housing of a stroking tool 32 (shown in Fig. 5a ).
  • the stroking tool has a stroking shaft which in a first downward stroke pushes the second piston part 17 downwards to expand the expandable metal sleeve 7 by the enclosed fluid below the second piston part 17. In a second stroke, the stroking tool engages the grooves 38 (shown in Fig.
  • the stroking tool may provide a pressurised fluid to move the second piston part 17, as shown in Fig. 3b , in order to expand the expandable metal sleeve 7.
  • the stroking tool then provides a further downward stroke to displace the piston 11 and the unit sleeve 10 downwards, breaking the second breakable element, i.e. a shear pin 18, and releasing the expansion unit 8 from the second end part 4, as shown in Fig. 3c , and the tool is retracted, as shown in Fig. 3d .
  • Sealing means 37 is provided in different places, as shown in Figs. 1a-3d , for ensuring a sufficient seal between moving parts of the abandonment plug 1.
  • the expandable metal sleeve 7 is mounted by means of connection parts 41 to an end 42 of the first end part 3 and to an end 43 of the second end part 4.
  • connection parts overlap the ends 42, 43 connecting the expandable metal sleeve 7 end to end to the first and second end parts 3, 4.
  • a plug and abandonment system 100 is shown in a well 2 comprising the abandonment plug and a cement supply 31 for supplying cement above the plug, below the plug and/or in the plug depending on what plug solution is chosen.
  • the plug and abandonment system 100 is arranged in a borehole 102 by means of drill pipe 25 or similar disconnectable tubing from a top 103 of the well.
  • the plug and abandonment system 100 is shown in a well 2 and comprises a stroking tool 32 connected to the expansion unit for providing an axial force for expanding the expandable metal sleeve 7, as shown in Fig. 5b , where the expansion unit 8 has been withdrawn, and cement 35 is applied above the plug 1.
  • a stroking tool 32 is a tool providing an axial force.
  • the stroking tool comprises an electrical motor for driving a pump.
  • the pump pumps fluid into a piston housing to move a piston acting therein.
  • the piston is arranged on the stroker shaft.
  • the pump may pump fluid into the piston housing on one side and simultaneously suck fluid out on the other side of the piston.
  • fluid or well fluid any kind of fluid that may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • annular barrier an annular barrier comprising a tubular metal part mounted as part of the well tubular metal structure and an expandable metal sleeve surrounding and connected to the tubular part defining an annular barrier space.
  • a casing or a well tubular metal structure is meant any kind of pipe, tubing, tubular, liner, string etc. used downhole in relation to oil or natural gas production.
  • a downhole tractor can be used to push the tool all the way into position in the well.
  • the downhole tractor may have projectable arms having wheels, wherein the wheels contact the inner surface of the casing for propelling the tractor and the tool forward in the casing.
  • a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Earth Drilling (AREA)
EP17206810.8A 2017-12-12 2017-12-12 Auflassungsstopfen und auflassungssystem Withdrawn EP3498968A1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP17206810.8A EP3498968A1 (de) 2017-12-12 2017-12-12 Auflassungsstopfen und auflassungssystem
EP18826979.9A EP3724442B1 (de) 2017-12-12 2018-12-11 Auflassungsstopfen und auflassungssystem
CA3084273A CA3084273A1 (en) 2017-12-12 2018-12-11 Abandonment plug and plug and abandonment system
US16/215,995 US11220879B2 (en) 2017-12-12 2018-12-11 Plug and plug and abandonment system
DK18826979.9T DK3724442T3 (da) 2017-12-12 2018-12-11 Sløjfningsprop samt afpropnings- og sløjfningssystem
CN201880077614.6A CN111417765A (zh) 2017-12-12 2018-12-11 废弃井塞及堵塞和废弃系统
RU2020121362A RU2799020C2 (ru) 2017-12-12 2018-12-11 Пробка для ликвидации скважины и система тампонирования и ликвидации скважины
AU2018385362A AU2018385362B2 (en) 2017-12-12 2018-12-11 Abandonment plug and plug and abandonment system
MX2020005469A MX2020005469A (es) 2017-12-12 2018-12-11 Tapon de abandono y sistema de taponamiento y abandono.
BR112020010108-7A BR112020010108B1 (pt) 2017-12-12 2018-12-11 Tampão de abandono e tampão e sistema de abandono
PCT/EP2018/084275 WO2019115491A1 (en) 2017-12-12 2018-12-11 Abandonment plug and plug and abandonment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17206810.8A EP3498968A1 (de) 2017-12-12 2017-12-12 Auflassungsstopfen und auflassungssystem

Publications (1)

Publication Number Publication Date
EP3498968A1 true EP3498968A1 (de) 2019-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17206810.8A Withdrawn EP3498968A1 (de) 2017-12-12 2017-12-12 Auflassungsstopfen und auflassungssystem

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EP (1) EP3498968A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022119445A1 (en) * 2020-12-03 2022-06-09 Brigantyne B.V. Method and system for closing a well

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053322A (en) * 1960-01-28 1962-09-11 Albert K Kline Oil well cementing shoe
US20040069485A1 (en) * 2002-10-09 2004-04-15 Ringgengberg Paul D. Downhole sealing tools and method of use
EP2565365A1 (de) * 2011-08-31 2013-03-06 Welltec A/S Trennungswerkzeug
EP2570588A1 (de) * 2011-09-13 2013-03-20 Welltec A/S Ringförmige Sperre mit Längskraftmechanismus
EP2947259A1 (de) * 2014-05-19 2015-11-25 Welltec A/S Bohrlochstrang zum Bohren durch eine Unterdruckzone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053322A (en) * 1960-01-28 1962-09-11 Albert K Kline Oil well cementing shoe
US20040069485A1 (en) * 2002-10-09 2004-04-15 Ringgengberg Paul D. Downhole sealing tools and method of use
EP2565365A1 (de) * 2011-08-31 2013-03-06 Welltec A/S Trennungswerkzeug
EP2570588A1 (de) * 2011-09-13 2013-03-20 Welltec A/S Ringförmige Sperre mit Längskraftmechanismus
EP2947259A1 (de) * 2014-05-19 2015-11-25 Welltec A/S Bohrlochstrang zum Bohren durch eine Unterdruckzone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022119445A1 (en) * 2020-12-03 2022-06-09 Brigantyne B.V. Method and system for closing a well
NL2027036B1 (en) * 2020-12-03 2022-07-06 Brigantyne B V Method and system for closing a well

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