EP3536897A1 - Offshore-verfahren - Google Patents

Offshore-verfahren Download PDF

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Publication number
EP3536897A1
EP3536897A1 EP18160315.0A EP18160315A EP3536897A1 EP 3536897 A1 EP3536897 A1 EP 3536897A1 EP 18160315 A EP18160315 A EP 18160315A EP 3536897 A1 EP3536897 A1 EP 3536897A1
Authority
EP
European Patent Office
Prior art keywords
production casing
production
casing
wellbore
drilling
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Withdrawn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
EP18160315.0A
Other languages
English (en)
French (fr)
Inventor
Christian Krüger
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 EP18160315.0A priority Critical patent/EP3536897A1/de
Priority to PCT/EP2019/055424 priority patent/WO2019170659A1/en
Priority to CA3091987A priority patent/CA3091987A1/en
Priority to BR112020017182-4A priority patent/BR112020017182A2/pt
Priority to MX2020008588A priority patent/MX2020008588A/es
Priority to EP19708540.0A priority patent/EP3762580A1/de
Priority to AU2019229552A priority patent/AU2019229552A1/en
Priority to EA202092005A priority patent/EA202092005A1/ru
Priority to CN201980013878.XA priority patent/CN111727299A/zh
Priority to US16/292,516 priority patent/US20190277107A1/en
Publication of EP3536897A1 publication Critical patent/EP3536897A1/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Withdrawn legal-status Critical Current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
    • E21B33/127—Packers; Plugs with inflatable sleeve
    • 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
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves
    • 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
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/04—Casing heads; Suspending casings or tubings in well heads
    • E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
    • E21B33/064—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers specially adapted for underwater 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/127—Packers; Plugs with inflatable sleeve
    • E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
    • 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
    • E21B33/16—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes using plugs for isolating cement charge; Plugs therefor
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • E21B34/101—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for equalizing fluid pressure above and below the valve
    • 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 offshore method for preparing a well for production of hydrocarbon-containing fluids from a wellbore.
  • the invention also relates to a downhole system derived from the method according to the present invention.
  • the Deepwater Horizon oil spill also referred to as the oil spill in the Gulf of Mexico or the Macondo blowout, is an oil spill which flowed unabated for three months in 2010.
  • This blowout is considered one of the largest accidental marine oil spills in the history of the petroleum industry, and the spill stemmed from a sea-floor oil gush which was a result of the 20 April 2010 explosion of the Deepwater Horizon rig which drilled on the Macondo Prospect. It is believed that one of the primary reasons for the cause of the blowout was a defective cement job during completion of the well. Cement is used to seal between a first tubular and a borehole wall and between the first tubular and the next tubular.
  • the cement is injected, and for some reason, the cement settles in the intended space and during this process, unwanted pockets are formed in the cement or the cement disappears in an unexpected fracture in the formation. If the cement does not sufficiently fill the annular space, e.g. between the first tubular and the borehole wall, the oil may leak during production and gush through the cement or along the tubular, and an oil spill disaster may be a consequence of this.
  • the drilling rig may be disconnected after the expandable metal sleeves of the annular barriers have been expanded before production is initiated.
  • the offshore method as described above may further comprise circulating cleaning fluids.
  • the offshore method as described above may further comprise circulating cleaning fluids before expansion of the expandable metal sleeves of the annular barriers for cleaning the wellbore from drilling mud.
  • the installation of the production casing may be performed by means of a drill pipe connected to the first end part of the production casing.
  • the production casing may comprise at least one valve arranged between two annular barriers, the valve being closed when disconnecting the drilling rig.
  • the production casing may comprise at least one valve arranged between two annular barriers, the valve being closed when disconnecting the drilling rig providing a well integrity barrier.
  • the offshore method as described above may further comprise installation of a downhole safety valve which is closed when disconnecting the drilling rig.
  • the offshore method as described above may further comprise installation of a downhole safety valve which is closed when disconnecting the drilling rig, providing a well integrity barrier.
  • the production casing below the plug may be filled with liquid when disconnecting the drilling rig.
  • the production casing below the plug may be filled with liquid when disconnecting the drilling rig, providing a well integrity barrier.
  • the production casing above the plug may be filled with liquid when disconnecting the drilling rig.
  • the production casing above the plug may be filled with liquid when disconnecting the drilling rig, providing a well integrity barrier.
  • the liquid may be sea water or brine.
  • the offshore method as described above may further comprise cementing an annulus between the production casing and an inner face of the wellbore.
  • the installation of the production casing may comprise a rotation of the production casing.
  • cleaning fluid such as acid
  • cleaning fluid may be circulated out of the second end part of the production casing while installing the production casing.
  • cleaning fluid such as acid
  • a dart may be circulated to the second end of the production casing, landing and closing the second end part before expansion of the expandable metal sleeves of the annular barriers.
  • the offshore method as described above may further comprise hanging off the production casing in a liner hanger or in a wellhead.
  • the production casing may have a receptacle at the first end.
  • the production casing may comprise gas lift valves.
  • the liquid above the plug may be brine.
  • the plug may be a glass plug.
  • the present invention also relates to a downhole system derived from the offshore method as described above.
  • Fig. 1 shows a wellsite 100 where legs of a drilling rig 4 are mounted into a seabed 14 adjacent an offshore well 2 which is being prepared, i.e. drilled and completed for production of hydrocarbon-containing fluids from a wellbore 3.
  • the drilling rig 4 is installed and a first part 5 of the wellbore is drilled, and then a conductor pipe 15 is arranged and after that, a surface casing 6 is arranged in the first part of the wellbore and both are cemented in place.
  • a drilling blowout preventer 7 has been connected with a top 8 of the surface casing, e.g. via a wellhead (not shown), thus the drilling blowout preventer 7 may be connected directly to or via a wellhead as shown in Fig. 9 . Then, a second part 9 of the wellbore has been drilled by a drill string 41 and a drilling head 42.
  • the production casing 10 has a first end part 11 which is closest to the top 8 of the surface casing and the production casing further has a second end part 12 arranged low in the wellbore.
  • the production casing 10 comprises a plurality of annular barriers 20. Each annular barrier has a tubular metal part 21 mounted as part of the production casing and an expandable metal sleeve 22 surrounding the tubular metal part.
  • the expandable metal sleeve has an inner face 23 facing the tubular metal part and an outer face 24 facing an inner face 25 of the wellbore of the well.
  • Each end 26 of the expandable metal sleeve is connected with the tubular metal part providing an annular space 27 (shown in Fig. 4 ) between the inner face of the expandable metal sleeve and the tubular metal part.
  • the production casing is inserted into the wellbore by means of drill pipe connected to the first end part 11, e.g. by means of a running tool 17 or a similar connection unit.
  • the expandable metal sleeve 22 is configured to expand, e.g. by pressurised fluid from within the production casing 10, as shown in Fig. 4 , where the expandable metal sleeves 22 of the annular barriers 20 have been expanded in order that the outer face 24 of the expandable metal sleeves 22 abut the inner face 25 of the wellbore.
  • the second end part 12 of the production casing 10 is closed by inserting a dart 56, circulated to the second end part 12 of the production casing 10 landing and closing the second end 18 of the production casing before expansion of the expandable metal sleeves 22 of the annular barriers 20.
  • a second and upper production casing 10A is installed in the first part of the wellbore overlapping the lower production casing 10, 10B by docking into a receptacle 58 at the first end part 11 of the lower production casing 10. Seals are provided therebetween.
  • the production casing 10 in Fig. 5 comprises an upper production casing 10A and a lower production casing 10B.
  • the production casing 10 extends all the way to the seabed.
  • a plug 28 is installed in the first end part 11 of the production casing 10 sealing off an inside 29 of the production casing.
  • the plug is set in the upper production casing 10A in fig. 6 , but it may also be set in the lower production casing 10B in another embodiment.
  • the wellbore When having the plug installed, the wellbore is sealed off, and the drilling blowout preventer can safely be disconnected from the top 8 of the surface casing 6, as shown in Fig. 7 , where also a production tree 19 has been connected with a wellhead 50 at the top 8 of the surface casing 6. Then the drilling rig is disconnected from the well 2, as shown in Fig. 7 .
  • a downhole safety valve 54 may be installed, as shown in Fig. 8 .
  • the plug After disconnecting the drilling blowout preventer and the drilling rig 4 and after connecting the production tree 19, the plug is removed and production of hydrocarbon containing fluid is initiated, e.g. early production or straight to production, as shown in Fig. 8 .
  • the drilling rig 4 is disconnected after the expandable metal sleeves 22 of the annular barriers 20 have been expanded and before production is initiated.
  • the annular barriers 20 provide a first well integrity barrier between the wall of the wellbore and the production casing 10.
  • the plug shown in Figs. 6 and 7 , provides a second well integrity barrier in the production casing 10.
  • the cement 44 between the first part of the wellbore and the conductor pipe and the cement between the conductor pipe and the surface casing provides a third well integrity barrier.
  • a downhole safety valve 54 (shown in Fig. 8 ) is installed before disconnecting the drilling rig, the closed downhole safety valve provides a fourth well integrity barrier, and thus creates a well integrity barrier when disconnecting the rig.
  • the production casing 10 below the plug is filled with liquid when disconnecting the drilling rig which provides a well integrity barrier and thus a fifth well integrity barrier.
  • the production casing 10 above the plug is filled with liquid when disconnecting the drilling rig which provides a well integrity barrier and thus a sixth well integrity barrier.
  • an annular barrier 20 is expanded providing a well integrity barrier between the surface casing and the production casing, providing a seventh well integrity barrier.
  • cleaning fluid such as acid
  • the plug may be a glass plug or a similar plug.
  • the production casing comprises at least one valve 53 arranged between two annular barriers 20.
  • the valve is closed when disconnecting the drilling rig providing a well integrity barrier being an eighth well integrity barrier.
  • the production casing also comprises gas lift valves 59 in order to provide a gas lift if needed later on.
  • the liquid below or above the plug may be sea water or well fluid, and the liquid may also be brine so that the liquid can always be circulated if needed before production.
  • the offshore method as described in relation to describing the above figures, may also comprise cementing an annulus 55 between the production casing and an inner face of the wellbore, as shown in Fig. 9 .
  • the cement 44 is displaced down in the production casing 10 and it is arranged in front of the dart in order that the cement is forced out of the second end 18 by forcing the dart downwards by a pressurised fluid upstream of the dart.
  • the production casing When the dart seats in the seat in the second end of the production casing 10, the production casing is pressurised and the expandable metal sleeves of the annular barriers are expanded by the pressurised fluid entering through openings in the tubular metal part of the production casing, allowing the pressurised fluid to enter the space of the annular barriers and thus forcing the expandable metal sleeves radially outwards.
  • the method may further comprise hanging off the production casing in a liner hanger 57 or in a wellhead 50, as shown in Fig. 9 .
  • the invention further relates to the downhole system 101 derived from the above described method.
  • valves of the production casing 10 may be opened e.g. by applying acid to dissolve an acid dissolvable plug or they may be opened by an intervention tool, such as a key tool engaging e.g. grooves in a sliding sleeve.
  • 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 any kind of gas composition present in a well, completion, or open hole
  • oil 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 production casing, intermediate casing, surface casing or 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP18160315.0A 2018-03-06 2018-03-06 Offshore-verfahren Withdrawn EP3536897A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP18160315.0A EP3536897A1 (de) 2018-03-06 2018-03-06 Offshore-verfahren
PCT/EP2019/055424 WO2019170659A1 (en) 2018-03-06 2019-03-05 Offshore method
CA3091987A CA3091987A1 (en) 2018-03-06 2019-03-05 Offshore method
BR112020017182-4A BR112020017182A2 (pt) 2018-03-06 2019-03-05 Método offshore
MX2020008588A MX2020008588A (es) 2018-03-06 2019-03-05 Metodo costa afuera.
EP19708540.0A EP3762580A1 (de) 2018-03-06 2019-03-05 Offshore-verfahren
AU2019229552A AU2019229552A1 (en) 2018-03-06 2019-03-05 Offshore method
EA202092005A EA202092005A1 (ru) 2018-03-06 2019-03-05 Морской способ
CN201980013878.XA CN111727299A (zh) 2018-03-06 2019-03-05 海上方法
US16/292,516 US20190277107A1 (en) 2018-03-06 2019-03-05 Offshore method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18160315.0A EP3536897A1 (de) 2018-03-06 2018-03-06 Offshore-verfahren

Publications (1)

Publication Number Publication Date
EP3536897A1 true EP3536897A1 (de) 2019-09-11

Family

ID=61581045

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18160315.0A Withdrawn EP3536897A1 (de) 2018-03-06 2018-03-06 Offshore-verfahren
EP19708540.0A Withdrawn EP3762580A1 (de) 2018-03-06 2019-03-05 Offshore-verfahren

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19708540.0A Withdrawn EP3762580A1 (de) 2018-03-06 2019-03-05 Offshore-verfahren

Country Status (9)

Country Link
US (1) US20190277107A1 (de)
EP (2) EP3536897A1 (de)
CN (1) CN111727299A (de)
AU (1) AU2019229552A1 (de)
BR (1) BR112020017182A2 (de)
CA (1) CA3091987A1 (de)
EA (1) EA202092005A1 (de)
MX (1) MX2020008588A (de)
WO (1) WO2019170659A1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014067992A2 (en) * 2012-10-31 2014-05-08 Welltec A/S Barrier testing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014067992A2 (en) * 2012-10-31 2014-05-08 Welltec A/S Barrier testing method

Also Published As

Publication number Publication date
BR112020017182A2 (pt) 2020-12-22
WO2019170659A1 (en) 2019-09-12
EA202092005A1 (ru) 2021-01-29
CN111727299A (zh) 2020-09-29
AU2019229552A1 (en) 2020-10-15
MX2020008588A (es) 2020-09-21
US20190277107A1 (en) 2019-09-12
CA3091987A1 (en) 2019-09-12
EP3762580A1 (de) 2021-01-13

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