US20180187518A1 - A Method of Plugging and Abandoning a Well - Google Patents

A Method of Plugging and Abandoning a Well Download PDF

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Publication number
US20180187518A1
US20180187518A1 US15/579,373 US201615579373A US2018187518A1 US 20180187518 A1 US20180187518 A1 US 20180187518A1 US 201615579373 A US201615579373 A US 201615579373A US 2018187518 A1 US2018187518 A1 US 2018187518A1
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United States
Prior art keywords
flushing
tool
well
pipe string
longitudinal section
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Abandoned
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US15/579,373
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English (en)
Inventor
Morten Myhre
Arne Gunnar Larsen
Roy Inge Jensen
Patrick Andersen
Arnold Østvold
Arnt Olav Dahl
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Hydra Systems AS
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Hydra Systems AS
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Application filed by Hydra Systems AS filed Critical Hydra Systems AS
Assigned to HYDRA SYSTEMS AS reassignment HYDRA SYSTEMS AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MYHRE, MORTEN, ANDERSEN, Patrick, DAHL, Arnt Olav, JENSEN, Roy Inge, LARSEN, ARNE GUNNAR, OSTVOLD, ARNOLD
Publication of US20180187518A1 publication Critical patent/US20180187518A1/en
Abandoned 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
    • E21B33/13—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
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
    • 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
    • E21B41/0078—Nozzles used in boreholes
    • 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
    • E21B43/11—Perforators; Permeators
    • E21B43/116—Gun or shaped-charge perforators
    • 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
    • E21B33/12—Packers; Plugs
    • E21B33/1204—Packers; Plugs permanent; drillable
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells

Definitions

  • the invention concerns a method of plugging and abandoning (P & A) a subterranean well.
  • the present method may be used for temporary or permanent plugging and abandonment of such a well.
  • the present method may be used in any type of subterranean well, including petroleum wells, for example production wells and injection wells.
  • the present method involves perforation, cleaning and plugging of a longitudinal section of the well located at a desired depth interval in the well. More specifically, the invention concerns a method that provides hydraulic isolation, in the form of a well plug, across a complete cross section of the well along at least the longitudinal section thereof.
  • the plug provides pressure-isolation both horizontally and vertically along said longitudinal section of the well.
  • the well is also provided with a pipe string in at least the longitudinal section of the well where the pressure-isolating well plug is to be formed.
  • Section milling It is known to establish a pressure-isolating barrier in a well by virtue of mechanically milling and removing a longitudinal section of casing in the well. Cement slurry is then placed into the milled-away section of the well so as to form, upon curing, a pressure-isolating cement barrier across the complete cross section of this milled-away section of the well.
  • This technology is generally referred to as “section milling” and has been used for decades to plug and abandon wells. Such section milling operations are very time-consuming and very costly for operators of the wells. Section milling operations generally require the presence of surface installations to allow metal shavings, so-called swarf, to be separated from the well fluids used during such milling operations.
  • the object of the invention is to remedy or reduce at least one disadvantage of the prior art, which includes said section milling technology, or at least to provide a useful alternative to the prior art.
  • the invention concerns a method of plugging and abandoning (P & A) a well temporarily or permanently.
  • the method involves perforation, cleaning and plugging of a longitudinal section of the well, said longitudinal section comprising a wellbore, a pipe string placed within the wellbore, and an annulus located between the wellbore and the pipe string.
  • the present method comprises the following steps:
  • This non-perpendicular configuration of the at least one flushing outlet in the flushing tool ensures very effective flushing and cleaning of both the pipe string and the annulus outside the pipe string. This in turn ensures good filling and good adhesion of the subsequent plugging material in the pipe string and in the annulus.
  • Said pipe string may be composed of a well pipe of a type known per se, for example a casing or a liner. As such, the pipe string may extend fully or partially, respectively, to the surface of the well.
  • the tubular work string is comprised of a drill string or a coiled-tubing string of a type known per se.
  • the flushing tool is formed with a plurality of flushing outlets having respective outlet axes (i.e. longitudinal axes through the flushing outlets) angled within ⁇ 80° of a plane being perpendicular to the longitudinal axis of the flushing tool.
  • respective outlet axes i.e. longitudinal axes through the flushing outlets
  • corresponding flushing jets from the flushing tool are also angled within ⁇ 80° of said perpendicular plane.
  • Each of the at least one flushing outlet may also be provided with a releasable nozzle insert.
  • the nozzle insert may be releasably connected to the flushing tool via a threaded connection or similar.
  • a nozzle insert is of a suitable size and shape for generating a flushing jet of desired concentration and distribution. The feature of being releasable also ensures that the nozzle insert is readily replaceable, if desired or required.
  • said nozzle insert may be radially telescopic relative to the flushing tool, and wherein the telescopic motion of the nozzle insert is selectively activated.
  • the nozzle insert may be selectively extended or retracted relative to the flushing tool.
  • the flushing tool may be lowered into the pipe string of the well with the at least one nozzle insert retracted into the flushing tool.
  • said nozzle insert may be selectively extended outward from the body of the flushing tool.
  • Such an embodiment of the flushing tool may prove advantageous in cases where the pipe string has one or more restrictions therein requiring a smaller sized flushing tool to be used for allowing access into the pipe string.
  • the flushing fluid may comprise drilling mud. This is generally a suitable flushing fluid given that drilling mud usually is readily available and also functions as a pressure barrier in a well.
  • the flushing fluid may also contain a cleaning agent, for example a suitable soap or acid.
  • the fluidized plugging material may comprise cement slurry for formation of a cement plug.
  • the fluidized plugging material may comprise a fluidized particulate mass for formation of a plug made of particulate mass.
  • a fluidized particulate mass is generally in an unconsolidated form.
  • a somewhat different use of such a fluidized particulate mass in a well is disclosed in e.g. WO 01/25594 A1 and in WO 02/081861 A1.
  • the method may also comprise the following steps:
  • the method may also comprise the following steps:
  • the method may also comprise the following steps:
  • step (C) of the method comprises rotating the tubular work string whilst flushing. Such rotation ensures larger area coverage of the flushing motion and thus enables better cleaning of the pipe string and the annulus.
  • step (C) of the method may also comprise moving the tubular work string in a reciprocating motion whilst flushing. Such reciprocation also ensures larger area coverage of the flushing motion and thus enables better cleaning of the pipe string and the annulus.
  • Step (E) of the method may also comprise moving the tubular work string within the pipe string whilst placing the fluidized plugging material therein.
  • the tubular work string may be moved in a suitable manner along the perforated longitudinal section of the pipe string for effective placement of the plugging material in the well.
  • the method may comprise adding an abrasive agent to the flushing fluid.
  • an abrasive agent e.g. cement residues (or some other casting material) and/or solid particles settled out within the annulus, e.g. barite particles settled out from drilling mud in the annulus.
  • solid materials may become difficult to remove from the annulus if the flushing fluid is void of such an abrasive agent.
  • the method comprises adding the abrasive agent to the flushing fluid in an amount of between 0.05 percent by weight and 1.00 percent by weight.
  • the abrasive agent may comprise sand particles. As such, and as an example, adding approximately 0.1 percent by weight of sand to the flushing fluid appears to be a suitable mixture.
  • the method may comprise discharging the flushing fluid from said at least one flushing outlet in the flushing tool at a discharge velocity of at least 15 metres per second.
  • the present applicant has carried out tests showing that a discharge velocity of 15 metres per second is a minimum value required for allowing the flushing tool to clean sufficiently in the well.
  • the method therefore comprises discharging the flushing fluid from the at least one flushing outlet at a discharge velocity of at least 50 metres per second.
  • a discharge velocity of at least 50 metres per second provides a particularly effective cleaning result in the well.
  • Optimum discharge velocities for the flushing fluid depend on the type of flushing fluid used, and particularly with respect to the viscosity of the flushing fluid.
  • High-viscosity flushing fluids usually require higher discharge velocities from the flushing tool than those of low-viscosity flushing fluids. This is simply because high-viscosity flushing fluids experience more internal friction, hence are slowed down faster, than that of low-viscosity flushing fluids.
  • Another embodiment of the method comprises discharging the flushing fluid from the at least one flushing outlet as a substantially rotation-free flushing jet. If such a flushing jet discharges from a nozzle insert disposed in the flushing outlet, this nozzle insert requires less space for support in the flushing tool than that of an alternative nozzle insert having a design capable of instilling a rotational/spinning effect on the flushing jet.
  • the method may also comprise disposing and anchoring a plug base in the pipe string, and below the longitudinal section of the well.
  • a plug base may comprise a mechanical plug, a packer element and/or at least one cup-shaped element, e.g. swab cup, of a type known per se.
  • the purpose of such a plug base is to support the fluidized plugging material once placed in the well.
  • a plug base e.g. mechanical plug
  • such a plug base is deployed into the pipe string carried on a so-called wireline or on a tubular work string, e.g. drill pipe string or coiled tubing, extending up to the surface of the well.
  • a column of a viscous fluid i.e. a so-called viscous pill, may be pumped into the pipe string, and below the longitudinal section of the well, to support said fluidized plugging material.
  • the longitudinal section is located at a relatively short distance from the bottom of the pipe string, it may not be necessary to set such a plug base in the pipe string. Instead, the fluidized plugging material is filled from the bottom of the pipe string and upward until the plugging material covers the longitudinal section of the well.
  • the method also comprises the following steps:
  • Steps (D) and (E) of the method may also comprise pumping the fluidized plugging material into the pipe string via at least one spraying outlet in the flushing tool so as to discharge as a corresponding spraying jet from the flushing tool.
  • flushing with the flushing fluid and spraying with the fluidized plugging material are performed in one and the same trip into the well.
  • these steps will save on the time and cost of plugging and abandoning the well.
  • the fluidized plugging material as a spraying jet emanating from the flushing tool, the plugging material also becomes directional and somewhat concentrated. This is advantageous in that such a spraying jet reaches further out from the flushing tool and may thus engage the formation wall defining the wellbore more readily and forcefully.
  • Such a spraying jet also gains better access to potential voids in said annulus surrounding the pipe string along the longitudinal section of the well.
  • the flushing tool comprises a first section for discharging, in step (C), the flushing fluid via said at least one flushing outlet, and a second section for spraying, in steps (D) and (E), the fluidized plugging material via said at least one spraying outlet in the flushing tool.
  • the diameter of said spraying jet of fluidized plugging material discharging from said second section of the flushing tool may be larger than the diameter of said flushing jet of flushing fluid discharging from said first section of the flushing tool.
  • the method may also comprise discharging said spraying jet of fluidized plugging material at a discharge velocity in the order of 15-25 metres per second, and preferably in the order of 18-22 metres per second. This range of discharge velocities is advantageous in achieving the spraying effect of the fluidized plugging material.
  • said at least one flushing outlet and said at least one spraying outlet in the flushing tool are one and the same, whereby both the flushing fluid and the fluidized plugging material will discharge through said at least one outlet in the flushing tool;
  • the method may comprise discharging the flushing fluid at a discharge velocity of at least 50 metres per second, and then discharging the subsequent fluidized plugging material at a discharge velocity in the order of 15-25 metres per second.
  • the method may also comprise the following steps:
  • FIG. 1 shows, in side view, a well within which a casing string is disposed
  • FIG. 2 shows, in side view, the well after having removed a longer portion of the casing string in accordance with a prior art plugging method (i.e. section milling);
  • FIG. 3 shows, in side view, the well of FIG. 2 after having established a plug in the well in accordance with this prior art section milling plugging method
  • FIG. 4 shows, in side view, the well as used in context of the present method, and after having lowered a perforation tool into the casing string;
  • FIG. 5 shows, in side view, the well after having perforated the casing string with the perforation tool, and after having pulled the perforation tool out of the well;
  • FIG. 6 shows, in side view, the well after having lowered a flushing tool into the casing string, and whilst using the flushing tool to flush and clean away e.g. solid particles in the well;
  • FIG. 7 shows, in side view, the well whilst filling and thus placing a fluidized plugging material into a portion of a longitudinal section of the well, thereby filling substantially the entire cross section of the well with the plugging material along the longitudinal section;
  • FIG. 8 shows, in side view, the well after having plugged the well along the longitudinal section thereof by means of the present method
  • FIG. 9 shows, in side view, a combined perforation and flushing tool for use in one embodiment of the present method.
  • FIG. 1 shows a well 1 to be plugged and abandoned after having removed a longer portion of a pipe string, here in the form of a single casing string 5 , in accordance with a prior art plugging method (i.e. so-called section milling).
  • the figure shows the casing string 5 disposed within a wellbore 2 of the well 1 .
  • a surrounding rock formation 9 defines the wellbore 2 .
  • An annulus 8 also exists between the wellbore 2 and the casing string 5 .
  • Typical well fluids known to a person skilled in the art are also present in the well 1 .
  • FIG. 2 shows the well 1 after having removed a longer portion/section of the casing string 5 in accordance with the noted prior art section milling plugging method. A substantial length of the casing string 5 is thus milled away.
  • FIG. 3 shows the well 1 after having filled cement slurry, i.e. a fluidized plugging material, into the milled-away section of the well 1 so as to fill the entire cross section T 1 thereof.
  • this cement slurry forms a pressure-isolating cement plug 25 along the milled-away section of the well 1 , as shown in FIG. 3 .
  • This section milling method has several disadvantages, as mentioned initially.
  • FIG. 4 shows a first step in the present method as applied in a similar well 1 .
  • a single casing string 5 is disposed within a wellbore 2 of a well 1 so as to leave an annulus 8 between the wellbore 2 and the casing string 5 .
  • a tubular work string here in the form of a drill string 3 , has been lowered into the casing string 5 onto a longitudinal section L 1 of the well 1 to be plugged and abandoned by virtue of the present method.
  • a perforation tool here in the form of a perforation gun 31 of a type known per se, has also been connected to a lower end portion of the drill string 3 .
  • the perforation gun 31 is activated and forms a number of perforations 51 along the longitudinal section L 1 and through the wall of the casing string 5 , as shown in FIG. 5 .
  • the perforation gun 31 may be pulled out of the well 1 and disconnected from the drill string 3 after having completed the perforation operation.
  • FIG. 6 shows the well 1 after having lowered a flushing tool 33 into the casing string 5 , and onto the longitudinal section L 1 , whilst being connected to a lower end portion of a drill string 3 .
  • This drill string may be the same drill string used in the preceding perforation step, or it may be another type of tubular work string, for example coiled tubing.
  • This figure also shows the flushing tool 33 whilst flushing and cleaning away e.g. solid particles (not shown in the figures) in the well 1 along the longitudinal section L 1 thereof.
  • a curved arrow at the upper portion of the drill string 3 indicates rotation of the drill string 3 , and hence rotation of the flushing tool 33 connected thereto, whilst flushing and cleaning with the flushing tool 33 .
  • the drill string 3 and thus the flushing tool 33 , may be moved in a reciprocating motion whilst flushing and cleaning the longitudinal section L 1 with the flushing tool 33 .
  • Rotation and/or reciprocation of the flushing tool 33 along the longitudinal section L 1 whilst flushing ensures better and possibly repeated area coverage so as to enable better cleaning of the casing string 5 and the surrounding annulus 8 along the longitudinal section L 1 of the well 1 .
  • the flushing tool 33 is formed with several flushing outlets 331 distributed in a desired pattern around the flushing tool 33 .
  • These flushing outlets 331 have respective outlet axes “b” angled within ⁇ 80° of a plane “c” being perpendicular to the longitudinal axis “a” of the flushing tool 33 .
  • corresponding flushing jets discharging from the flushing tool 33 are also angled within ⁇ 80° of the perpendicular plane “c”.
  • Longitudinal axis “a”, outlet axis “b” and perpendicular plane “c” are also shown in FIG. 9 .
  • FIG. 6 also shows a flushing fluid 35 in the form of flushing jets discharging at high velocity, and as substantially rotation-free jets, from corresponding nozzle inserts 332 provided in the flushing outlets 331 of the flushing tool 33 .
  • These nozzle inserts 332 ensure a desired concentration and distribution of the flushing jets upon discharging from the outlets 331 of the flushing tool 33 .
  • the flushing jets discharge at various angles relative to said perpendicular plane “c” and go through the corresponding perforations 51 and enter the annulus 8 at different angles. This ensures better access to areas of the annulus 8 located between the perforations 51 , thereby ensuring better flushing and cleaning of these intermediate areas of the annulus 8 .
  • angled flushing jets are depicted with straight arrows pointing outward from some of the flushing outlets 331 shown in FIG. 6 .
  • the flow direction and potential flow paths of the discharging flushing fluid 35 are depicted with curved arrows located around the flushing tool 33 in FIG. 6 .
  • the discharging flushing fluid 35 therefore flows out through perforations 51 proximate to the flushing outlets 331 , via the annulus 8 outside the casing string 5 , and then flows back into the casing string 5 via perforations 51 more distal to the flushing outlets 331 .
  • the flushing tool 33 is moved slowly along the longitudinal section L 1 whilst simultaneously flushing the casing string 5 and the annulus 8 , thereby continuously repeating this instant flushing scenario along the longitudinal section L 1 of the well 1 .
  • This flushing motion goes on until the entire longitudinal section L 1 has been covered and cleaned sufficiently.
  • a further cleaning and conditioning fluid is typically pumped in the described manner through the flushing tool 33 and into the casing string 5 and annulus 8 , thereby further cleaning and conditioning the wellbore 2 and the casing string 5 for the purpose of allowing cement slurry 37 , i.e. a fluidized plugging material, to be introduced into at least the longitudinal section L 1 thereafter (cf. FIGS. 7 and 8 ).
  • This further cleaning and conditioning fluid may be comprised of a so-called spacer fluid, which is typically used to clean away remaining solids in the wellbore 2 /annulus 8 and also to ensure water-wetting and conditioning of the casing string 5 and the surrounding rock formation 9 (which defines the wellbore 2 ) so as to bond well with the subsequent cement slurry 37 to be introduced therein.
  • spacer fluid is generally of less density than the cement slurry 37 used in plugging steps (D) and (E) of the present method. Therefore, the cement slurry 37 easily displaces the spacer fluid during these plugging steps.
  • FIG. 7 shows the well 1 whilst pumping and thus placing cement slurry 37 into a lower portion of the longitudinal section L 1 of the well 1 , thereby filling substantially the entire cross section T 1 of the well 1 with cement slurry 37 .
  • the figure shows cement slurry 37 flowing out of the lower end of the drill string 3 so as to fill the inside of the casing string 5 , after which the cement slurry 37 flows onward into the annulus 8 via the perforations 51 in the wall of the casing string 5 .
  • the denser cement slurry 37 easily displaces the less dense spacer fluid (or other less dense well fluid), if present, upward within the well 1 and thus removes the spacer fluid from said longitudinal section L 1 .
  • the drill string 3 is moved slowly upward whilst filling and placing cement slurry 37 into the casing string 5 along the entire longitudinal section L 1 of the well 1 .
  • This filling and moving step may also continue until cement slurry 37 has been filled into the casing string 5 to some desired level above the longitudinal section L 1 , whereby at least the longitudinal section L 1 of the well 1 is filled with cement slurry 37 .
  • a mechanical plug 38 has been disposed and anchored within the casing string 5 , and below the longitudinal section L 1 , to provide a supporting base for the cement slurry 37 once placed in the casing string 5 .
  • the flushing tool 33 may remain connected to the drill string 3 after having flushed and cleaned the longitudinal section L 1 .
  • Cement slurry 37 is then pumped down the drill string 3 and discharges from the nozzle inserts 332 provided in the flushing outlets 331 of the flushing tool 33 .
  • the cement slurry 37 may discharge as spraying jets from the flushing tool 33 , and at a significantly lower discharge velocity than that of the high discharge velocity of the preceding flushing jets of flushing fluid 35 .
  • FIG. 8 shows the well 1 after having filled cement slurry 37 into the casing string 5 and the surrounding annulus 8 , as described hereinbefore, and after having cured therein so as to form a pressure-isolating cement plug 25 covering substantially the entire cross section T 1 of the well 1 along at least the longitudinal section L 1 thereof.
  • the drill string 3 is pulled out of the well 1 .
  • the well 1 is then abandoned temporarily or permanently.
  • FIG. 9 shows a selectively releasable perforation tool 31 connected in a releasable manner to a lower end portion of a flushing tool 33 so as to form an assembly 34 thereof.
  • the assembly 34 is connected to a lower portion of the drill string 3 (not shown in FIG. 9 ).
  • Selective release of the perforation tool 31 from the flushing tool 33 may be carried out by technical means and methods known per se. Use of such an assembly 34 allows perforation and flushing to be performed in one and the same trip into the well 1 . By so doing, the perforation tool 31 is dropped further down into the casing string 5 and is thus left behind in the well 1 . This may facilitate the subsequent operation of the flushing tool 33 in the well 1 and, as such, may save further on the time and cost of carrying out such a plugging operation.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Piles And Underground Anchors (AREA)
  • Cleaning In General (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Prostheses (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sink And Installation For Waste Water (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Earth Drilling (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
US15/579,373 2015-06-10 2016-06-01 A Method of Plugging and Abandoning a Well Abandoned US20180187518A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20150744A NO340959B1 (en) 2015-06-10 2015-06-10 A method of plugging and abandoning a well
NO20150744 2015-06-10
PCT/NO2016/050112 WO2016200269A1 (en) 2015-06-10 2016-06-01 A method of plugging and abandoning a well

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US (1) US20180187518A1 (de)
EP (1) EP3307985B1 (de)
AU (1) AU2016277179B2 (de)
CA (1) CA3026613C (de)
DK (1) DK3307985T3 (de)
EA (1) EA036974B1 (de)
GB (1) GB2555058B (de)
MY (1) MY192204A (de)
NO (1) NO340959B1 (de)
WO (1) WO2016200269A1 (de)

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WO2020185229A1 (en) * 2019-03-13 2020-09-17 Halliburton Energy Services, Inc. Single trip wellbore cleaning and sealing system and method
US20220307345A1 (en) * 2021-03-29 2022-09-29 Conocophillips Company Method and apparatus for use in plug and abandon operations
CN117189027A (zh) * 2023-11-07 2023-12-08 中石化西南石油工程有限公司 连续油管拖动紊流器进行注灰封层的方法及其装置
US12146389B2 (en) 2020-03-09 2024-11-19 Hydra Systems As Fluid diverter tool, system and method of diverting a fluid flow in a well
US12241336B2 (en) * 2023-07-17 2025-03-04 Weatherford Technology Holdings, Llc Control of annulus return flow in well operations

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AU2016277179A1 (en) 2018-01-18
EP3307985A1 (de) 2018-04-18
GB201721116D0 (en) 2018-01-31
DK3307985T3 (en) 2020-09-14
GB2555058B (en) 2019-01-02
EP3307985B1 (de) 2020-07-22
CA3026613C (en) 2022-08-23
NO340959B1 (en) 2017-07-31
CA3026613A1 (en) 2016-12-15
GB2555058A (en) 2018-04-18
NO20150744A1 (en) 2016-12-12
EP3307985A4 (de) 2019-01-23
EA201792646A1 (ru) 2018-06-29
MY192204A (en) 2022-08-08
WO2016200269A1 (en) 2016-12-15
AU2016277179B2 (en) 2019-05-30

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