EP3940194A1 - Procédé et système de réparation de fuite annulaire de boîtier - Google Patents

Procédé et système de réparation de fuite annulaire de boîtier Download PDF

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Publication number
EP3940194A1
EP3940194A1 EP21185346.0A EP21185346A EP3940194A1 EP 3940194 A1 EP3940194 A1 EP 3940194A1 EP 21185346 A EP21185346 A EP 21185346A EP 3940194 A1 EP3940194 A1 EP 3940194A1
Authority
EP
European Patent Office
Prior art keywords
heat
casing
deforming material
heater
annular
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.)
Pending
Application number
EP21185346.0A
Other languages
German (de)
English (en)
Inventor
Brett Bouldin
Robert John Turner
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.)
Saudi Arabian Oil Co
Original Assignee
Saudi Arabian Oil Co
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 Saudi Arabian Oil Co filed Critical Saudi Arabian Oil Co
Publication of EP3940194A1 publication Critical patent/EP3940194A1/fr
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/10—Reconditioning of well casings, e.g. straightening
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/02—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/008—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using chemical heat generating means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/107—Locating fluid leaks, intrusions or movements using acoustic means

Definitions

  • the present disclosure is generally related to systems and processes for repairing a leak in a well and more particularly related to systems and processes for repairing a leak in a casing of a well.
  • the present application addresses these and other challenges related to repairing leaks in the casing of a well.
  • the present disclosure is directed to a method for repairing a leak in a cement sheath of a casing of a well, the casing including an inner casing and an outer casing with the cement sheath formed therebetween.
  • the method includes the steps of: removing a portion of the inner casing and the cement sheath at a location above the leak to create an opening that extends through the inner casing and extends at least partially within the cement sheath, respectively; inserting a tool within the inner casing to a location adjacent to the opening, the tool being positioned radially inward of the inner casing, cement sheath and outer casing, the tool including one or more segments of heat-deforming material disposed along an outer surface of the tool; heating the one or more segments of the heat-deforming material to cause the one or more segments of the heat-deforming material to melt and wherein the tool is configured to direct the melted heat-deforming material radially outward into the opening; and cooling the melted heat-deforming material while the heat-deforming material
  • the casing can include an inner casing and an outer casing with a first space formed therebetween
  • the method can include the steps of: removing a portion of the inner casing to create an opening in the inner casing so that the first space is accessible; inserting a tubular and an annular packer tool attached to the tubular to a location adjacent to the opening, wherein the annular packer tool surrounds the tubular and comprises one or more segments of heat-deforming material on an outer surface of the annular packer tool; inserting a heater into the well and positioning the heater at a location that is internally within the tubular and is adjacent to the annular packer tool; activating the heater to a temperature above an activation temperature of the one or more segments of heat-deforming material, thereby causing the heat-deforming material to melt, and wherein the melted heat-deforming material flows into the opening; and reducing the temperature of the location adjacent to the annular packer tool to below the activation temperature of the heat-deforming material to cause the melted heat-de
  • the present disclosure is directed to a system for repairing a leak in a casing of a well, where the casing comprises an inner casing and an outer casing.
  • the system includes: an underreamer configured to remove a portion of the inner casing at the location of the leak to create an annular-shaped opening in the inner casing; a tubular and an annular packer tool attached to the tubular, wherein the tubular is positioned a location adjacent to the annular-shaped opening, and wherein the annular packer tool comprises one or more segments of heat-deforming material on its outer surface; and a heater configured to heat the well at the location adjacent to the annular packer tool, to a temperature above an activation temperature of the one or more segments of heat-deforming material.
  • the present application discloses methods and systems for repairing a leak in a casing of a well.
  • the system can include an underreamer, a cleaning tool (e.g., hydrojet), a tubular (e.g., scab liner), an annular packer tool, and a heater.
  • a leak such as a casing-to-casing annular (CCA) leak is located in a casing of the well.
  • the casing can include an inner casing string ("inner casing") and an outer casing string (“outer casing”) with cement separating the inner and outer casings.
  • an underreamer is used to remove a portion of the inner casing and sometimes the cement at the location of the leak, thereby creating an annular-shaped opening in the inner casing.
  • This annular-shaped opening is then cleaned to remove any debris.
  • the formed opening can be a concentric annular, partially eccentric annular, or fully eccentric annular in shape, for example.
  • a tubular such as a scab liner, is inserted into the well and an annular packer tool is attached to the scab liner.
  • the annular packer tool includes one or more segments of heat-deforming material (e.g., eutectic metal) on its outer surface.
  • the scab liner and the annular packer tool are inserted into the well at a location adjacent to the created annular-shaped opening.
  • a heater e.g., thermite heater
  • Initiation of the heater heats the location adjacent to the annular packer tool such that the segments of heat-deforming material of the annular packer tool melt.
  • the melted heat-deforming material then flows into the annular-shaped opening and solidifies after cooling. Solidification of the heat-deforming material in the annular-shaped opening plugs the annular-shaped opening, thereby repairing (sealing) the previously identified leak in the casing.
  • Fig. 1 is a cross-section of a portion of a well 100 that has a leak in a casing 102 after the casing is cemented in accordance with one or more embodiments.
  • the casing 102 comprises an inner casing 104 and an outer casing 106, which surrounds the inner casing 104.
  • the inner casing 104 and outer casing 106 are separated by a cement sheath 108.
  • the outer casing 106 can be a 13 and 3/8ths inch (13-3/8") outer diameter (OD) casing and the inner casing can be a 9 and 5/8ths inch (9-5/8") OD casing.
  • the sizes of the inner casing 104 and the outer casing can vary, and thus are not limited to the above embodiment.
  • Leaks can develop between the inner casing 104 and the outer casing 106 over time.
  • the root cause of these leaks is often a lack of sufficient sealing of the cement between the inner casing 104 and outer casing 106.
  • This lack of sufficient sealing between the casing strings can occur for one or more of the following reasons: 1) cement shrinkage during curing; 2) poor casing centralization that yields non-uniform cement sealing stress; 3) cement leakage, particularly in horizontal wells as an annulus develops in the upper part of the casing seal; 4) development of micro-cracks due to excessive mechanical or thermal stresses that can cause the cement to fail (crack) and develop a leak; 5) mud channeling, particularly in deviated wells with poor centralization, which to leave a mud channel on a thin side of the casing which is not displaced with cement, resulting in future leakage; 6) gas channeling; and (7) micro-annuli.
  • Gas channeling can occur as a result of cement slurry hardening as it goes through the gelation state, and the resulting shrinkage of the cement causes reduction in hydrostatic pressure.
  • This shrinkage and reduction in hydrostatic pressure allows an influx of gas from permeable formations to form channels for gas to migrate between formation zones or between a zone and the surface of the well.
  • Micro-annuli are concentric gaps created between tubular and cement due to high pressures such as fracturing causing the casing to elastically deform, excessive compression of the cement, then opening of an annulus as the pressure is reduced.
  • Gas wells are especially susceptible to leaks in the casing 102 (e.g., casing-to-casing annular [CCA] leaks) and are equally difficult to repair once they occur.
  • the present systems and methods allow for the effective repair of casing leaks, particularly in a well that has already been cemented using conventional techniques.
  • Figs. 2A-2B a cross-section of a portion of a well during and after repair of the leak via the systems and methods of the present application in accordance with one or more embodiments.
  • a CCA leak 109 can develop in the cement sheath 108 of the casing 102.
  • a CCA leak 109 develops in the cement sheath 108 because the cement is not sealing between the inner casing 104 and the outer casing 106.
  • the method for repairing the leak begins by determining the location of the leak. There are several ways to determine the location of the CCA leak 109 in the casing 102.
  • the CCA leak 109 can be detected by identifying the inflow and outflow positions of the leak using one or more acoustic logging tools.
  • the acoustic logging tools can be used in the well while the well is shut-in, for example.
  • the acoustic logging tools are used to listen for fluid and glass flows behind the casing. It will be appreciated that any number of suitable detection techniques can be used.
  • one or more portions of the inner casing 104 near the location of the leak 109 is removed so as to expose the leak. In one or more embodiments, at least one portion of the inner casing 104 that is removed is above the location of the leak 109 (i.e., above the inflow point).
  • the one or more portions the inner casing 104 is removed using an underreamer to remove the selected portion of the inner casing 104.
  • an adjacent portion of the cement sheath 108 is also removed.
  • the cement sheath 112 adjacent to the removed inner casing portion can also be removed, thereby revealing the outer casing 106 (see Fig. 2A ).
  • the removal of each portion of the inner casing 104 and, in some embodiments, an adjacent portion of the cement sheath 112 results in an annular-shaped opening 110 or "donut" being formed.
  • the step of removing the at least one portion of the inner casing 104 includes determining a length of the inner casing 104 to remove based on the locations of inflow and outflow positions of the leak in the casing.
  • the annular-shaped opening 110 can be approximately 3 feet in length.
  • the size of the one or more formed annular-shaped openings 110 can vary depending on the distance between the inflow and outflow positions of the leak, as well as the size of inner and outer casings.
  • the at least one annular-shaped opening 110 in the inner casing 104 is created (e.g., via underreaming), the at least one annular-shaped opening 110 is cleaned.
  • the annular-shaped opening 110 can be cleaned via a cleaning tool, such as a hydro-jetting tool ("hydrojet").
  • the cleaning tool can be a laser tool, a sonic/acoustic tool, or a vibration tool, for example. Cleaning of the annular-shaped opening 110 cleans the debris and any remnants of the cement sheaths (excess cement) from the annular-shaped opening 110.
  • a tubular 112 (e.g., scab liner) is inserted to a location adjacent to the annular-shaped opening 110.
  • the tubular 112 can be a scab liner.
  • the tubular can be another type of tubular or liner and is not limited to a scab liner.
  • the scab liner is a 7" scab liner.
  • the diameter of the scab liner can vary depending on the size of the well and the size casing.
  • the scab liner 112 is inserted along with an annular packer tool 114 that is attached to the scab liner along the outer surface of the scab liner 112.
  • the annular packer tool 114 is disposed such that it surrounds the scab liner 112 and the annular packer tool 114 is disposed between the scab liner 112 and the inner casing 104. Since the scab liner 112 has a smaller inner diameter than the inner casing 104, the location of the scab liner 112 represents a local constricted area.
  • the annular packer tool 114 can be a modified version of the TDAP tool as produced by BiSN Tec Ltd, except that that the annular packer tool 114 of the present application does not include springs, annular seals, or axial hole for cementing as provided in TDAP tool of BiSN Tec Ltd.
  • a diagram of an exemplary annular packer tool 114 attached to the scab liner 112 is shown at Fig. 3 .
  • the annular packer tool 114 is cylindrical in shape and is sized to run on the outside of the scab liner 112, which is also cylindrical.
  • the annular packer tool 114 thus surrounds the scab liner 112 and can be positioned at the desired select position of the scab liner 112 for placement in the desired repair location relative to the leak which is located radially outward from the annular packer tool 114.
  • the annular packer tool 114 has previously been utilized in methods as a proactive measure for preventing leaking during the construction phase of the well. For example, in previous methods, the annular packer tool is run with a casing string during the well construction phase. The annular packer tool 114 is used in a completely different manner and matter in the systems and methods of the present application as compared to its prior uses, and particularly for repairing existing leak in the casing of a well.
  • the annular packer tool 114 comprises one or more segments 116 (cylinders) of heat-deforming material on its outer surface.
  • the heat-deforming material 116 comprises a low-melting point metal, such as a eutectic metal.
  • the eutectic metal can comprise bismuth (Bi) and tin (Sn) (e.g., a bismuth-tin alloy).
  • the heat-deforming material 116 can comprise one or more other low-melting point materials or metals that are not considered eutectic metals.
  • the annular packer tool 114 can also include other portions of one or more metals that have a higher melting point than the activation temperature of the heat-deforming material (e.g., eutectic metal) segments 116.
  • the annular packer tool 114 can comprise centralizers 117 (e.g., carbon steel guides) that have the same or larger diameter as the eutectic metal segments 116 are configured to fix the ends of the annular packer tool 114 to the scab liner 112 such that the annular packer tool 114 remains on the scab liner 112.
  • the annular packer 114 is inserted on the scab liner 112 to a location that is adjacent to the annular-shaped opening 110.
  • the well can include a production liner 124 (e.g., 7" production liner) and the scab liner 112 can be tied back to the production liner 124 (e.g., via a tie or other fixture).
  • a production liner 124 e.g., 7" production liner
  • the scab liner 112 can be tied back to the production liner 124 (e.g., via a tie or other fixture).
  • an upper part of the production liner 124 can have a polished bore receptacle (PBR) and the bottom of the scab liner 112 can have a seal assembly.
  • PBR polished bore receptacle
  • the seal assembly enters and seals in the PBR.
  • the scab liner can alternatively be tied back to a wellhead of the well.
  • the scab liner can be held at a location adjacent to the annular-shaped opening 110 with a running tool.
  • a heater 120 is inserted into the well 100 inside the scab liner 112 and thus can be positioned inside the annular packer tool 114.
  • the heater 120 is lowered in the well 100 to a predetermined location adjacent to the annular packer tool 114.
  • the heater 120 can be, for example, an electric heater, an inductive heater, or a chemical heater (e.g., thermite heater).
  • the heater 120 is lowered into the well 100 via an electric line 121.
  • the heater 120 is attached to the electric line 121 and both are then selectively lowered into the well to a predetermined location adjacent to the annular packer tool 114 with the scab liner 112 being between the heater 120 and the annular packer tool 114.
  • the heater 120 is initiated, thereby heating the location adjacent to the annular packer tool 114.
  • the heat from the heater 120 thus passes through the scab liner 112 to the annular packer tool 114 that surrounds the scab liner 112.
  • the initiated heater 120 is configured to heat the location adjacent to the annular packer tool 114 to a temperature above an activation temperature of the one or more segments of heat-deforming material 116 (without adversely impacting the scab liner 112). As such, the increased temperature causes the heat-deforming material segments 116 to melt.
  • the heater 120 is configured to heat the location adjacent to the annular packer tool 114 to a temperature above the activation temperature of the heat-deforming material segments 116 but below the melting point of the other metal portions.
  • the preferred activation temperature of the heat-deforming material when the heat-deforming material is a Bi-Sn alloy is approximately 50°C greater than the highest expected temperature experienced during service in the well.
  • the activation temperature can be in the range of 90°C to 500°C. However, it should be understood that higher or lower temperatures for the activation temperature of the heat-deforming material can be selected in other embodiments.
  • the heater 120 can be run through the running tool and into the scab liner 112 adjacent to the heat-deforming material segments 116 (e.g., eutectic metal). In such an embodiment, the heater can then be initiated to melt the heat-deforming material.
  • the heat-deforming material segments 116 e.g., eutectic metal
  • the annular packer tool 114 is constructed such that when the heat-deforming material segments 116 melt, the melted metal flows into the opening 110.
  • the centralizers 117 that border the ends of the metal segments 116 limit where the melted heat-deforming material can flow until the melted heat-deforming material can solidify within the opening 110.
  • the heater 120 is turned off or deactivated such that the reaction that causes the increase in temperature in the heater 120 is neutralized and the temperature around the heater 120 is lowered below the activation temperature of the heat-deforming material. As such, due to the decrease in temperature, the melted heat-deforming material solidifies within the at least one annular-shaped opening 110.
  • the heater 120 is removed from the location adjacent to the annular packer tool 114. In one or more embodiments, the heater 120 is removed from the location adjacent to the annular packer tool 114 via the electric line 121.
  • the heat-deforming material e.g., eutectic metal
  • the heat-deforming material expands volumetrically in the annular-shaped opening 110. This volumetric expansion exerts radial stress on the portion of the inner casing 104 and outer casing 106 that surrounds the annular-shaped opening 110.
  • the heat-deforming material solidifies in the annular-shaped opening 110, it forms a seal 126.
  • This seal 126 forms a metal-to-metal seal with the metal of the inner casing 104 and the metal of the outer casing 106 that surrounds the annular-shaped opening 110, thereby providing a gas-tight seal at the location of the CCA leak.
  • the scab liner 112 remains in the well after the leak has been repaired/sealed, and thus permanently or semi-permanently constricts the area of the well in which the leak was repaired.
  • the scab liner 112 is held in place by the running tool, once the heater is deactivated and the heat-deforming material solidifies within the opening 110, the heater is removed, and the running tool is retrieved, but the scab liner can remain in the well.
  • the heat-deforming material e.g., eutectic metal
  • the heat-deforming material that flows and then cools and hardens is bonded to both the scab liner 112 and the outer casing 106.
  • the cooled, hardened heat-deforming material that is formed thus in effect plugs the opening 110 and also causes the scab liner 112 to be bonded to the outer casing 106.
  • the packer tool 114 is thus left in place and can be at least partially embedded within the hardened heat-deforming material.
  • the annular packer tool 114 is thus sacrificed and left in place along with the scab liner 112.
  • the present system and methods for repairing an existing leak in a casing effectively sections off one or more portions of the casing around the leak. This is accomplished by removing the inner casing 104 and cement sheath at these portions of the casing (e.g., via underreaming) and filling the created void in the casing (annular-shaped opening 110) with heat-deforming material from the annular packer tool 114 to form a gas-tight, metal-to-metal seal. Via the gas-tight, metal-to-metal seal, the present systems and methods provide an effective and durable repair of the casing compared to prior solutions.
  • one or more production liners 125 can be provided and can be secured within the inner casing 104.
  • the production liner 125 and the scab liner 112 preferably having the same inner diameter.
  • the present method and system thus provides a solution to remedying leaks that occur in the already formed cement sheath 108 of the well that is located between the two sheaths 104, 106.
  • the tool i.e., the packer tool 114 that repairs (e.g., plugs) the leak is delivered to a location radially inward of the inner casing 104 but is carried radially outward of the scab liner 112.
  • the melted heat-deforming material flows radially outward into such opening resulting in repair of the cement sheath, thereby forming a seal between the scab liner 112 and the outer casing 106.
EP21185346.0A 2020-07-14 2021-07-13 Procédé et système de réparation de fuite annulaire de boîtier Pending EP3940194A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16/928,701 US20220018201A1 (en) 2020-07-14 2020-07-14 Casing annulus leakage repair method and system

Publications (1)

Publication Number Publication Date
EP3940194A1 true EP3940194A1 (fr) 2022-01-19

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EP (1) EP3940194A1 (fr)

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RU2808789C1 (ru) * 2023-05-05 2023-12-05 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Устройство аварийного соединения и цементирования раскрепленной обсадной колонны

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Publication number Priority date Publication date Assignee Title
US11939835B2 (en) * 2022-04-04 2024-03-26 Saudi Arabian Oil Company Repairing wellbores with fluid movement behind casing
US20230349264A1 (en) * 2022-04-29 2023-11-02 Bisn Tec Ltd. Methods to repair well liner hangers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100155085A1 (en) * 2008-10-20 2010-06-24 Spencer Homer L Method and apparatus for sealing wells in co2 sequestration projects
WO2016049424A1 (fr) * 2014-09-25 2016-03-31 Schlumberger Canada Limited Outil d'étanchéité de fond de trou
WO2016123166A1 (fr) * 2015-01-27 2016-08-04 Schlumberger Technology Corporation Appareil de coupe et d'obturation de fond de trou
WO2018033760A1 (fr) * 2016-08-19 2018-02-22 Bisn Tec Ltd Opérations de fond de trou relatives à des massifs de gravier en trou ouvert et outils destinés à être utilisés au cours de celles-ci
GB2561255A (en) * 2017-04-04 2018-10-10 Bisn Tec Ltd Improvements relating to thermally deformable annular Packers
GB2568519A (en) * 2017-11-17 2019-05-22 Bisn Tec Ltd An expandable eutectic alloy based downhole tool and methods of deploying such

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7934552B2 (en) * 2005-09-08 2011-05-03 Thomas La Rovere Method and apparatus for well casing repair and plugging utilizing molten metal
GB2480869B (en) * 2010-06-04 2017-01-11 Bisn Tec Ltd Method and apparatus for use in well abandonment
US10202814B2 (en) * 2014-06-10 2019-02-12 Schlumberger Technology Corporation Downhole tool with expandable stabilizer and underreamer
EP3132118B1 (fr) * 2014-07-18 2020-02-19 Halliburton Energy Services, Inc. Détermination d'emplacements de sources acoustiques autour d'un trou de forage
US10760374B2 (en) * 2016-09-30 2020-09-01 Conocophillips Company Tool for metal plugging or sealing of casing
GB2562620B (en) * 2017-04-17 2021-09-15 Schlumberger Technology Bv Systems and methods for remediating a microannulus in a wellbore

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100155085A1 (en) * 2008-10-20 2010-06-24 Spencer Homer L Method and apparatus for sealing wells in co2 sequestration projects
WO2016049424A1 (fr) * 2014-09-25 2016-03-31 Schlumberger Canada Limited Outil d'étanchéité de fond de trou
WO2016123166A1 (fr) * 2015-01-27 2016-08-04 Schlumberger Technology Corporation Appareil de coupe et d'obturation de fond de trou
WO2018033760A1 (fr) * 2016-08-19 2018-02-22 Bisn Tec Ltd Opérations de fond de trou relatives à des massifs de gravier en trou ouvert et outils destinés à être utilisés au cours de celles-ci
GB2561255A (en) * 2017-04-04 2018-10-10 Bisn Tec Ltd Improvements relating to thermally deformable annular Packers
GB2568519A (en) * 2017-11-17 2019-05-22 Bisn Tec Ltd An expandable eutectic alloy based downhole tool and methods of deploying such

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2808789C1 (ru) * 2023-05-05 2023-12-05 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Устройство аварийного соединения и цементирования раскрепленной обсадной колонны

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