US20210172283A1 - A device for forming a barrier in an annulus of a well - Google Patents

A device for forming a barrier in an annulus of a well Download PDF

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Publication number
US20210172283A1
US20210172283A1 US16/769,724 US201816769724A US2021172283A1 US 20210172283 A1 US20210172283 A1 US 20210172283A1 US 201816769724 A US201816769724 A US 201816769724A US 2021172283 A1 US2021172283 A1 US 2021172283A1
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Prior art keywords
liquid
opening
annulus
pressure
introducing
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Abandoned
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US16/769,724
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English (en)
Inventor
Bengt Gunnarsson
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Cannseal As
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Cannseal As
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Publication of US20210172283A1 publication Critical patent/US20210172283A1/en
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    • 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
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/0419—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion using down-hole motor and pump arrangements for generating hydraulic 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
    • E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
    • E21B27/02—Dump bailers, i.e. containers for depositing substances, e.g. cement or acids
    • 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
    • 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
    • E21B33/138—Plastering the borehole wall; Injecting into the formation
    • 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
    • E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes

Definitions

  • the present invention relates to a device for forming a barrier in an annulus of a well, such as a hydrocarbon or water injector well.
  • the device comprises an injection tool adapted to introduce a polymeric hardening liquid in through an opening in the annulus, and a pump unit adapted to provide pressure to said liquid so that the liquid is introduced into the opening in the annulus with a controllable pressure.
  • the present invention further relates to an arrangement and a method for forming a barrier in an annulus of a well.
  • annulus of a well needs to be remedially repaired in order to provide the required and necessary annulus sealing capabilities.
  • the annulus of the well is located between two pieces of pipes, tubing-casings or casing to casing.
  • the annulus can also be between the said tubing/casing and the wellbore formation.
  • the purpose of the casings are for example to isolate different zones of the well, or to function as a well barrier to the surface.
  • the annulus isolation are formed by either cement, another sealing material or by a mechanical packer being part of the initial well completion.
  • a challenge with a cemented annulus is that it can leak water or hydrocarbons in between the zones, or to the surface via the cemented annulus.
  • Prior art devices for repairing a leaking cemented barrier is called a cement squeeze and comprising a method where cement is squeezed into the annulus to repair the failed barrier. To repair a leaking packer is by traditional means not possible.
  • WO2010/147476A1 discloses a well tool and a method for forming a barrier in a well using a resin.
  • the invention has for its object to remedy or to reduce at least one of the drawbacks of the prior art, or at least provide a useful alternative to prior art.
  • the object is achieved through features, which are specified in the description below and in the claims that follow.
  • the object of the invention is to provide an improved device for forming a barrier in an annulus of a well.
  • an object of the invention is to provide a device that enables a barrier to be formed in an annulus of a well subjected to a differential pressure with improved reliability.
  • the device comprises
  • the device is characterized in that it comprises a control unit adapted to control the pump unit so that said liquid is provided into the opening with an initial pressure at a start up phase of introducing the liquid into the opening and a final pressure at a close-down phase of introducing the liquid into the opening, wherein the final pressure is higher than the initial pressure.
  • the injection tool is configured to introduce a polymeric hardening liquid in through the opening in the annulus when forming the barrier.
  • the pump unit is adapted to provide pressure to the liquid so that the liquid is introduced in through the opening with a pressure.
  • the control unit is adapted to control the pressure in which the pump unit introduces the liquid in through the opening in the annulus.
  • the polymeric hardening liquid relates to a polymeric based liquid that is hardening with time, i.e. the viscosity of the hardening liquid increases from a pumpable liquid to a none pumpable paste, and being a solid at the final stage.
  • control unit is adapted to control the pump unit so that said liquid is provided into the opening with a gradual increasing pressure over time from the start up phase to the close-down phase of introducing the liquid to the opening in the annulus.
  • the device is in particular preferably for forming a barrier in an annulus comprising a cement material.
  • the device may be applied to an annulus filed with other types of solids.
  • the initial pressure is between 1-50 bar, preferably between 10-30 bar.
  • the final pressure is between 2-400 bar, preferably between 30-250 bar.
  • control unit adapted to control the pump unit between the start up phase and the close-down phase of introducing the liquid to the opening at a time period between one hour and 72 hours, preferably between 12 and 48 hours.
  • the device further comprises a device for forming said opening in the annulus.
  • the device for forming said opening comprises for example a perforation unit or a drill unit.
  • control unit adapted to control the pump unit so that said liquid is provided into the opening in the annulus with two or more injection sequences with increasing pressure.
  • the object of the invention is further obtained by means of an arrangement for forming a barrier in a concrete annulus of a well.
  • the arrangement comprises the device according to any of above embodiments and a polymeric hardening liquid.
  • said liquid has a viscosity between 5-1*10 ⁇ circumflex over ( ) ⁇ 6 cP at the start up phase of introducing the liquid to the opening, preferably a viscosity of between 15 20000 cP.
  • said liquid has a viscosity between 1*10 ⁇ circumflex over ( ) ⁇ 6-10*10 ⁇ circumflex over ( ) ⁇ 6 cP at the close down phase of introducing the liquid to the opening, preferably between 2*10 ⁇ circumflex over ( ) ⁇ 6-5*10 ⁇ circumflex over ( ) ⁇ 6 cP.
  • said liquid mainly comprises a thermoset material.
  • the object of the invention is further obtained by means of a method for forming a barrier in a concrete annulus of a well.
  • the method comprises:
  • the method comprises:
  • the initial pressure is between 1-50 bar, preferably between 10-30 bar.
  • the final pressure is between 2-400 bar, preferably between 30-250 bar.
  • a time period between the start up phase and the close-down phase of introducing the liquid to the opening is between one hour and 72 hours, preferably between 12 and 48 hours.
  • the method comprises providing said liquid into the opening in the annulus with two or more injection sequences with increasing pressure.
  • FIG. 1 discloses a schematic view of device for forming a barrier in an annulus of a well according to an embodiment of the invention
  • FIG. 2 discloses a schematic view of a well comprising an annulus to be provide with a barrier by means of the device in FIG. 1 ;
  • FIG. 3 discloses a flow chart of a method for forming a barrier in an annulus of a well according to an embodiment of the invention
  • FIG. 4 discloses a flow chart of a method for forming a barrier in an annulus of a well according to a further embodiment of the invention.
  • FIG. 5 discloses a flow chart of a method for forming a barrier in an annulus of a well according to yet another embodiment of the invention.
  • FIG. 1 is a schematic view of device 1 for forming a barrier in an annulus 5 of a well according to an embodiment of the invention disclosed.
  • FIG. 1 also discloses an arrangement 10 comprising the device 1 configured with a polymeric hardening liquid.
  • the device 1 comprises an elongated structure to be inserted in the well 11 , such as a hydrocarbon or water injector well.
  • FIG. 2 is a schematic view of a well 11 comprising the annulus 5 to be provided with a barrier by means of the device 1 in FIG. 1 .
  • the well 11 comprises a well head 12 and a first casing 14 and second casing 16 concentric between which an annulus 5 is formed that has been filled with a solid, such a solid comprising a cement material or other suitable material.
  • the device 1 is adapted to be introduced into the well 11 .
  • a part of the annulus 5 is filled with a good cement column, another part of the annulus 5 is filled with poor cement column, and yet another part of the annulus 5 is without filling.
  • the annulus 5 is to be provided with one or several barriers by means of the device 1 in FIG. 1 .
  • the device 1 comprises an injection tool 20 , a device 22 for forming the opening into the annulus 5 , a reservoir 24 for containing the polymeric hardening liquid and a pump unit 26 .
  • the device 22 for forming the opening in the annulus 5 comprises for example a drill unit comprising a drive unit and a drill bit for drilling through the first casing 14 and into the annulus 5 .
  • the device 22 for forming the opening in the annulus 5 comprises alternatively a perforation unit.
  • the injection tool 20 is adapted to introduce the polymeric hardening liquid in through an opening in the annulus 5 .
  • the injection tool 20 comprises an outlet adapted to be aligned with the opening in the annulus 5 for providing the liquid into the opening.
  • the pump unit 26 is configured to provide pressure to the liquid so that the liquid is introduced into the opening in the annulus 5 with a controllable pressure.
  • the pump unit 26 comprises for example a hydraulic induced pump or an electric induced pump.
  • the device 1 further comprises a control unit 30 adapted to control the pump unit 26 and accordingly the pressure in which the liquid is introduced into the opening in the annulus 5 .
  • the control unit 30 adapted to control the pump unit 26 so that said liquid is provided into the opening with an initial pressure at a start up phase of introducing the liquid into the opening and a final pressure at a close-down phase of introducing the liquid into the opening. The final pressure is higher than the initial pressure.
  • the control unit 30 is adapted to control the pump unit 26 so that the liquid is introduced at a low pressure when the liquid has a low viscosity at the start-up phase of forming the barrier and at a high pressure when the liquid has a high viscosity at the close-down phase when forming the barrier.
  • the “low” and “high” in the previous sentence is to be regarded as relative terms for the purpose of explaining the invention. Details on parameters for forming will be explained in connection with the explanation of the method.
  • the control unit 30 comprises a logic unit, such as a CPU, adapted to execute a computer program, and signalling means connected to the pump unit 26 for controlling the pressure of introducing the liquid into the opening in the annulus 5 . It shall be understood that the control unit 30 comprises the necessary features for controlling the pressure of introducing the liquid into the opening in the annulus 5 during a period of time of forming the barrier.
  • the device 1 comprises the control unit 30 and further control means 31 for controlling the control unit 30 from the surface.
  • the further control means 31 is for example a computer unit comprising a CPU adapted to execute a computer program.
  • the further control means 31 is connected to the control unit 30 , which in the disclosed embodiment is located in vicinity of the pump unit 26 .
  • the polymeric hardening liquid comprise mainly a thermoset material.
  • the liquid has preferably the characteristic in form a viscosity between 5-2000 cP at the start up phase of introducing the liquid to the opening, preferably a viscosity of between 15-1*10 ⁇ circumflex over ( ) ⁇ 6 cP.
  • the liquid has preferably the characteristic in form a viscosity between 1*10 ⁇ circumflex over ( ) ⁇ 6-10*10 ⁇ circumflex over ( ) ⁇ 6 cP at the close down phase of introducing the liquid to the opening, preferably between 2*10 ⁇ circumflex over ( ) ⁇ 6-5*10 ⁇ circumflex over ( ) ⁇ 6 cP.
  • control unit 30 of above discussed device 1 is configured to control the device 1 accordingly.
  • FIG. 3 is a flow chart of a method for forming a barrier in an annulus 5 of a well 11 according to an embodiment of the invention disclosed.
  • the method comprises, in a step 110 , positioning an injection tool 20 at a position of an opening in in the annulus 5 for introducing the polymeric hardening liquid.
  • the method comprises, at a start-up phase, introducing the liquid into the opening at an initial pressure.
  • the method comprises, at a close-down phase, introducing the liquid into the opening at a final pressure, wherein the final pressure is higher than the initial pressure.
  • the method comprises introducing the liquid into the opening at the initial pressure between 1-50 bar, preferably between 10-30 bar.
  • the method comprises introducing the liquid into the opening at the final pressure is between 2-400 bar, preferably between 30-250 bar.
  • the duration between the start up phase and the close-down phase of introducing the liquid to the opening is between one hour and 72 hours, preferably between 12 and 48 hours.
  • FIG. 4 is a flow chart of a method for forming a barrier in an annulus 5 of a well 11 according to a further embodiment of the invention disclosed.
  • the method in FIG. 4 differs from the method in FIG. 3 in that the method further comprises, in a step 125 , gradually increasing the pressure of the liquid over time from the start up phase to the close-down phase of introducing the liquid into the opening.
  • FIG. 5 is a flow chart of a method for forming a barrier in an annulus 5 of a well 11 according to yet another embodiment of the invention disclosed.
  • the method in FIG. 5 differs from the method in FIG. 3 in that the method further comprises, in a step 127 , providing said liquid into the opening in the annulus 5 with two or more injection sequences with increasing pressure.
  • the method in FIG. 3-5 may also involve the step of forming the opening into the annulus 5 if the opening into the annulus 5 has not yet been established.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Environmental & Geological Engineering (AREA)
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US16/769,724 2017-12-07 2018-11-29 A device for forming a barrier in an annulus of a well Abandoned US20210172283A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20171955A NO344114B1 (en) 2017-12-07 2017-12-07 A device for forming a barrier in an annulus of a well
NO20171955 2017-12-07
PCT/NO2018/050297 WO2019112438A1 (en) 2017-12-07 2018-11-29 A device for forming a barrier in an annulus of a well

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US (1) US20210172283A1 (da)
EP (1) EP3721047B1 (da)
DK (1) DK3721047T3 (da)
NO (1) NO344114B1 (da)
WO (1) WO2019112438A1 (da)

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NO347203B1 (en) 2020-10-20 2023-07-03 Interwell Norway As Thermite deployment tool
NO347012B1 (en) 2020-10-20 2023-04-03 Interwell Norway As Thermite deployment tool
NO347929B1 (en) 2021-03-19 2024-05-13 Interwell P&A As Sedimented thermite in well

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NO325306B1 (no) * 2005-03-14 2008-03-25 Triangle Tech As Fremgangsmåte og anordning for in situ dannelse av en tetning i et ringrom i en brønn
US7523785B2 (en) * 2006-03-09 2009-04-28 Maersk Olie Og Gas A/S System for injecting a substance into an annular space
US7757769B2 (en) * 2007-10-04 2010-07-20 Baker Hughes Incorporated Wellbore and reservoir treatment device and method
NO329699B1 (no) * 2009-06-16 2010-12-06 Agr Cannseal As Brønnverktøy og fremgangsmåte for in situ innføring av et behandlingsfluid i et ringrom i en brønn
EP2574720B1 (en) * 2011-09-30 2015-02-25 Welltec A/S A downhole injection tool
US10018011B2 (en) * 2012-10-16 2018-07-10 Maersk Olie Og Gas A/S Sealing apparatus and method
US9546313B2 (en) * 2013-12-13 2017-01-17 Brian Henry Tomlinson Compositions and methods for controlling wellsite fluid and gas flow
GB2538437B (en) * 2014-04-07 2021-03-24 Halliburton Energy Services Inc Systems and methods for using cement slurries in hydrajetting tools
CN106285554B (zh) * 2016-09-07 2018-09-14 中国石油大学(华东) 用于固井阶段的井筒压力控制系统及方法

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DK3721047T3 (da) 2024-03-18
NO20171955A1 (en) 2019-06-10
EP3721047A1 (en) 2020-10-14
NO344114B1 (en) 2019-09-09
EP3721047B1 (en) 2023-12-27
EP3721047A4 (en) 2021-07-07
WO2019112438A1 (en) 2019-06-13

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