WO2009109599A1 - A method and an apparatus for downhole injecting one or more treatment fluids. - Google Patents

A method and an apparatus for downhole injecting one or more treatment fluids. Download PDF

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Publication number
WO2009109599A1
WO2009109599A1 PCT/EP2009/052554 EP2009052554W WO2009109599A1 WO 2009109599 A1 WO2009109599 A1 WO 2009109599A1 EP 2009052554 W EP2009052554 W EP 2009052554W WO 2009109599 A1 WO2009109599 A1 WO 2009109599A1
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WO
WIPO (PCT)
Prior art keywords
fluid
container
wellbore
downhole
pumps
Prior art date
Application number
PCT/EP2009/052554
Other languages
French (fr)
Inventor
Wilhelmus Hubertus Paulus Maria Heijnen
Original Assignee
Mærsk Olie Og Gas A/S
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 Mærsk Olie Og Gas A/S filed Critical Mærsk Olie Og Gas A/S
Priority to DK09716673.0T priority Critical patent/DK2255062T3/en
Priority to US12/920,298 priority patent/US8936097B2/en
Priority to EP09716673.0A priority patent/EP2255062B1/en
Priority to BRPI0909681-7A priority patent/BRPI0909681B1/en
Priority to NO09716673A priority patent/NO2255062T3/no
Publication of WO2009109599A1 publication Critical patent/WO2009109599A1/en

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Classifications

    • 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
    • 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 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
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means

Definitions

  • the present invention relates to the field of oil recovery from a wellbore.
  • a well For oil recovery a well is drilled and a well tubular such as a casing or a liner is introduced into the well.
  • the outside diameter of the well tubular is smaller than the inside diameter of the wellbore, thereby forming an annular space between the well tubular and the wellbore.
  • the well tubular is perforated at one or more zones in order to facilitate the flow of hydrocarbons into the tubular and subsequent flow upstream for recovery.
  • contaminating materials such as water and sand are produced along with the hydrocarbons from a part of the subterranean formations surrounding the well tubular. In these situations it is desirable to seal off the well tubular from one or more parts of the annular space. Also in other situation it may be desirable to seal off the annular space.
  • cement or another harden able composition is then pumped down to the isolated zone to seal the perforated openings in the desired part of the well tubular. If production is subsequently desired from a zone situated further downstream in the casing, removal or penetration of the seal is required.
  • a "treatment fluid” e.g. an acid, a polymer, or cement
  • the bailer contains a specific volume and is possible to activate due to density differential of the treatment fluid relative to the natural fluids present in the wellbore at the time and location of treatment.
  • modified bailer systems do not satisfactorily deliver a predetermined amount of a treatment fluid at the exact location, especially in highly deviated wells or in the well tubular which has become “cork-screwed".
  • a number of other systems have been devised for deploying a "treatment fluid” at a proper location for e.g. providing a seal.
  • US 6,955,216 disclose a device for injecting a fluid into an earth formation surrounding a well.
  • the device comprises a body suitable for being arranged in a well bore and provided with a fluid chamber for storage of suitable sealant and a pair of inflatable packers arranged to isolate a portion of the well bore between the packers upon inflating the packers.
  • the suitable sealant in then injected by means of piston working under pressure against the surrounding pressure into the formation through perforations isolated between the packers.
  • the sealant composition is disclosed to be a suitable material, such as a vulcanised or unvulcanised rubber composition.
  • US 4,972,906 disclose the use of a mixture of a liquid epoxy material and a hardener for plugging a zone in a subterranean zone.
  • the epoxy material used is heavier than the fluid in the well, and it is further characterized as being free of solids and having a low viscosity at downhole temperature and pressure.
  • the material is placed in a well by the use of a positive displacement bailer.
  • US 5,582,251 disclose a downhole mixer having separated compartments for containing two or more different compounds to be mixed in situ downhole.
  • This downhole mixer comprises a piston arranged for both breaking a sealing between each compartment, and for driving the mixed constituents through an outlet against the downhole surrounding pressure into the wellbore for providing a bridge plug, a packer or other downhole function.
  • a method and an apparatus for downhole injecting one or more treatment fluids, and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system comprising the steps of
  • each treatment fluid separately into one or more fluid containers arranged in a injecting tool, each container comprising container walls surrounding the fluid in the fluid container, and an outlet opening.
  • the invention is especially advantageous in an embodiment where at least two different fluids, such as a basic component and its curing or expanding component are to be injected downhole, whereby each fluid is pumped out of each fluid container in a predetermined volume relative to each other.
  • the pumps are each having a drive shaft connected to the single motor for driving each pump, and wherein the pumps are selected having a pre-determined displacement of fluids per revolution of the drive shaft being relative to each other by the same ratio as defined by the pre-determined volume of the fluids.
  • the fluid containers has container walls being elastic or plastic deformable and being collapsible under the surrounding pressure in the wellbore.
  • the fluid container can be made as a disposable or refillable cartridge having a pipe having a first end extending inside the fluid container and through the container wall, and another end on the outside of the container, the other end of the pipe forming the outlet of the fluid container. I this relation it is preferable if a plurality of holes are made in the pipe at different positions along its first end in order to allow fluid in the fluid container to enter into the pipe, and thereby avoiding the elastic or collapsible wall blocking the fluid stream.
  • the fluid containers, and the pumps and motor are arranged inside an injection tool casing for protection, and where the injection tool casing is having openings allowing ambient pressure to reach at least part of the inside of the injecting tool casing containing the fluid containers.
  • a downhole injecting tool for injecting at least one fluid at a pre-determined position in a wellbore and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system
  • said downhole injecting tool comprising at least one fluid container each having a fluid container outlet connected to a pump and a motor arranged for pumping fluid out of the container and into the wellbore, and where each fluid container comprises container walls surrounding the fluid in the container, and wherein the injecting tool is constructed such that at least part of the outside of the container walls are open to the ambient pressure surrounding the injecting tool, and that the above mentioned at least part of the outside of the container walls is displaceable within the injecting tool.
  • the injection system according to fig. 1 comprises a casing 1 having a cross section so that the complete casing 1 can be lowered into a wellbore, or an inner lining in a wellbore (not shown).
  • the cross section of the casing 1 would be cylindrical, but other cross sections may be used within the scope of the invention.
  • two cartridges 2 and 3 each containing fluid to be injected into the wellbore or inner lining in the wellbore.
  • the casing 1 also contains two pumps 4, 5 being connected respectively to the cartridges 1, 3 via the pipes 11, 12 extending from inside each cartridge 2, 3 respectively and to the inlet of each pump 4, 5. From each pump 4, 5 is arranged an outlet pipe 7, 8 respectively extending along the inside of the casing 1 an past the cartridge 3 and further through the casing 1 where the pipes 7, 8 end outside the casing 1 defining fluid outlets 9, 10 for injecting fluids to the wellbore or the inner lining in a wellbore.
  • the pipes 11, 12 have a plurality of holes 15, allowing the fluid in each cartridge to enter the pipes 11, 12.
  • the pumps 4, 5 are driven through driveshaft 13 by means of a single electrical motor 6, and the motor 6 can be operated and controlled from outside by means of control and/or power wiring or by wireless signaling combined with an internal electrical power pack arranged in the motor.
  • control and/or power wiring or by wireless signaling combined with an internal electrical power pack arranged in the motor.
  • a plurality of holes 16 are made in the casing 1, so that the inside of the casing 1 gets the same hydrostatical pressure as the pressure in the wellbore, so that this pressure helps emptying the cartridges 2, 3.
  • the injection tool is possible to construct using a very limited number of components when using a single motor 6 driving both pumps 2, 3, and especially when using positive displacement pumps 2, 3 because this on the one side makes it possible to avoid separate valves for retaining the fluids in the cartridges during lowering of the casing into a wellbore or an inner liner in the wellbore, and on the other side ensures exact mixing of the fluids with the correct mixing ratio when the pumps are selected having a displacement ratio per revolution of the driveshaft 13 being the same as the selected mixing ratio of the fluids.
  • fig. 1 discloses an injecting tool having two separated cartridges
  • the present invention is also applicable to injecting tools having one or more than two cartridges in the casing as well as the necessary pumps for each cartridge. Similar designs can therefore be made for fluid systems consisting of a single or more than two components.

Abstract

Method and apparatus for downhole injecting one or more treatment fluids, and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system, said method comprising the steps of loading the or each treatment fluid separately into one or more fluid containers (2,3) arranged in a injection tool (1), each container comprising container walls surrounding the fluid in the fluid container, and an outlet opening,- lowering the injection tool body into the wellbore or the well tubular to a predetermined position, pumping the fluids from each fluid container into the wellbore or the well tubular.

Description

A METHOD AND AN APPARATUS FOR DOWNHOLE INJECTING ONE OR
MORE TREATMENT FLUIDS.
FIELD OF THE INVENTION
The present invention relates to the field of oil recovery from a wellbore.
BACKGROUND OF THE INVENTION
For oil recovery a well is drilled and a well tubular such as a casing or a liner is introduced into the well. The outside diameter of the well tubular is smaller than the inside diameter of the wellbore, thereby forming an annular space between the well tubular and the wellbore. The well tubular is perforated at one or more zones in order to facilitate the flow of hydrocarbons into the tubular and subsequent flow upstream for recovery. Occasionally contaminating materials such as water and sand are produced along with the hydrocarbons from a part of the subterranean formations surrounding the well tubular. In these situations it is desirable to seal off the well tubular from one or more parts of the annular space. Also in other situation it may be desirable to seal off the annular space.
To seal off a desired part of, e.g., a well one possibility is to isolate the internal part of the well tubular using temporary packers. Cement or another harden able composition is then pumped down to the isolated zone to seal the perforated openings in the desired part of the well tubular. If production is subsequently desired from a zone situated further downstream in the casing, removal or penetration of the seal is required.
In the past the placing of a "treatment fluid", e.g. an acid, a polymer, or cement, within a wellbore has been accomplished by use of a "bailer" which is introduced into the well on a wire line or the like. The bailer contains a specific volume and is possible to activate due to density differential of the treatment fluid relative to the natural fluids present in the wellbore at the time and location of treatment. Even modified bailer systems do not satisfactorily deliver a predetermined amount of a treatment fluid at the exact location, especially in highly deviated wells or in the well tubular which has become "cork-screwed". Thus, a number of other systems have been devised for deploying a "treatment fluid" at a proper location for e.g. providing a seal.
US 6,955,216 disclose a device for injecting a fluid into an earth formation surrounding a well. The device comprises a body suitable for being arranged in a well bore and provided with a fluid chamber for storage of suitable sealant and a pair of inflatable packers arranged to isolate a portion of the well bore between the packers upon inflating the packers. The suitable sealant in then injected by means of piston working under pressure against the surrounding pressure into the formation through perforations isolated between the packers. The sealant composition is disclosed to be a suitable material, such as a vulcanised or unvulcanised rubber composition.
US 4,972,906 disclose the use of a mixture of a liquid epoxy material and a hardener for plugging a zone in a subterranean zone. The epoxy material used is heavier than the fluid in the well, and it is further characterized as being free of solids and having a low viscosity at downhole temperature and pressure. The material is placed in a well by the use of a positive displacement bailer.
US 5,582,251 disclose a downhole mixer having separated compartments for containing two or more different compounds to be mixed in situ downhole. This downhole mixer comprises a piston arranged for both breaking a sealing between each compartment, and for driving the mixed constituents through an outlet against the downhole surrounding pressure into the wellbore for providing a bridge plug, a packer or other downhole function.
It is evident that it is important to place seals, plugs and the like in the correct position and to ensure proper mixing of the constituents to ensure their correct function, and therefore there is an ongoing process of developing new and improved apparatuses and procedures for introducing seals or plugs or the like in a well, and especially in an annular space between a well tubular and the surrounding formation.
SUMMARY OF THE INVENTION
In accordance with the invention there is provided a method and an apparatus for downhole injecting one or more treatment fluids, and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system, said method comprising the steps of
a) loading the or each treatment fluid separately into one or more fluid containers arranged in a injecting tool, each container comprising container walls surrounding the fluid in the fluid container, and an outlet opening.
b) lowering the injecting tool body into the wellbore or the well tubular to a predetermined position, c) exposing at least part of the outside of the fluid container walls to the surrounding pressure in the wellbore,
d) Allowing at least part of each of the fluid containers walls to displace within the depositing tool body under forces exerted on the fluid container walls by the surrounding pressure in the wellbore.
e) Pumping the fluids from each fluid container into the wellbore or the well tubular.
It is hereby achieved that the precise mixing and positioning of the fluids are possible without using heavy loaded pumps and motors, due to the high downhole surrounding pressure acting to help driving fluids out of the containers.
The invention is especially advantageous in an embodiment where at least two different fluids, such as a basic component and its curing or expanding component are to be injected downhole, whereby each fluid is pumped out of each fluid container in a predetermined volume relative to each other.
In order to avoid the components reacting with each other in the pumps, it is advantageous to use separate pumps connected to each fluid container.
In order to ensure correct mixing of the fluids, a number of further preferred embodiments are disclosed
In this respect it is especially advantageous to use positive displacement pumps for pumping each fluid, and to use a single motor for driving all the pumps.
Preferably the pumps are each having a drive shaft connected to the single motor for driving each pump, and wherein the pumps are selected having a pre-determined displacement of fluids per revolution of the drive shaft being relative to each other by the same ratio as defined by the pre-determined volume of the fluids.
In a further advantageous embodiment the fluid containers has container walls being elastic or plastic deformable and being collapsible under the surrounding pressure in the wellbore. Especially the fluid container can be made as a disposable or refillable cartridge having a pipe having a first end extending inside the fluid container and through the container wall, and another end on the outside of the container, the other end of the pipe forming the outlet of the fluid container. I this relation it is preferable if a plurality of holes are made in the pipe at different positions along its first end in order to allow fluid in the fluid container to enter into the pipe, and thereby avoiding the elastic or collapsible wall blocking the fluid stream.
In a further preferred embodiment the fluid containers, and the pumps and motor are arranged inside an injection tool casing for protection, and where the injection tool casing is having openings allowing ambient pressure to reach at least part of the inside of the injecting tool casing containing the fluid containers.
According to the invention, a downhole injecting tool is also suggested for injecting at least one fluid at a pre-determined position in a wellbore and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system, said downhole injecting tool comprising at least one fluid container each having a fluid container outlet connected to a pump and a motor arranged for pumping fluid out of the container and into the wellbore, and where each fluid container comprises container walls surrounding the fluid in the container, and wherein the injecting tool is constructed such that at least part of the outside of the container walls are open to the ambient pressure surrounding the injecting tool, and that the above mentioned at least part of the outside of the container walls is displaceable within the injecting tool.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail wait reference to the drawing fig. 1 showing schematically a longitudinal section of the downhole injecting tool 1 according to the present invention
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The injection system according to fig. 1 comprises a casing 1 having a cross section so that the complete casing 1 can be lowered into a wellbore, or an inner lining in a wellbore (not shown). Normally the cross section of the casing 1 would be cylindrical, but other cross sections may be used within the scope of the invention. In the casing are arranged two cartridges 2 and 3, each containing fluid to be injected into the wellbore or inner lining in the wellbore.
The casing 1 also contains two pumps 4, 5 being connected respectively to the cartridges 1, 3 via the pipes 11, 12 extending from inside each cartridge 2, 3 respectively and to the inlet of each pump 4, 5. From each pump 4, 5 is arranged an outlet pipe 7, 8 respectively extending along the inside of the casing 1 an past the cartridge 3 and further through the casing 1 where the pipes 7, 8 end outside the casing 1 defining fluid outlets 9, 10 for injecting fluids to the wellbore or the inner lining in a wellbore.
Inside the cartridges 2, 3 the pipes 11, 12 have a plurality of holes 15, allowing the fluid in each cartridge to enter the pipes 11, 12.
The pumps 4, 5 are driven through driveshaft 13 by means of a single electrical motor 6, and the motor 6 can be operated and controlled from outside by means of control and/or power wiring or by wireless signaling combined with an internal electrical power pack arranged in the motor. Many different solutions to controlling the motor can be suggested without departing from the idea of the invention, and therefore such means are not disclosed in the drawing.
Upon activation the electrical motor 6 and the pumps 4, 5, will be able to pump fluids from the cartridges 2, 3 and out of the casing 1 via the fluid outlets 9, 10.
According to the invention a plurality of holes 16 are made in the casing 1, so that the inside of the casing 1 gets the same hydrostatical pressure as the pressure in the wellbore, so that this pressure helps emptying the cartridges 2, 3.
A person skilled in the art would appreciate that the injection tool is possible to construct using a very limited number of components when using a single motor 6 driving both pumps 2, 3, and especially when using positive displacement pumps 2, 3 because this on the one side makes it possible to avoid separate valves for retaining the fluids in the cartridges during lowering of the casing into a wellbore or an inner liner in the wellbore, and on the other side ensures exact mixing of the fluids with the correct mixing ratio when the pumps are selected having a displacement ratio per revolution of the driveshaft 13 being the same as the selected mixing ratio of the fluids.
Even though fig. 1 discloses an injecting tool having two separated cartridges, the present invention is also applicable to injecting tools having one or more than two cartridges in the casing as well as the necessary pumps for each cartridge. Similar designs can therefore be made for fluid systems consisting of a single or more than two components.
All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference in their entirety and to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein, regardless of any separately provided incorporation of particular documents made elsewhere herein.
The use of the terms "the", "a", "an" and similar referents in the context of describing the invention are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context.
Unless otherwise stated, all exact values provided herein are representative of corresponding approximate values (e.g., all exact exemplary values provided with respect to a particular factor or measurement can be considered to also provide a corresponding approximate measurement, modified by "about," where appropriate).
The description herein of any aspect or embodiment of the invention using terms such as
"comprising", "having," "including," or "containing" with reference to an element or elements is intended to provide support for a similar aspect or embodiment of the invention that "consists of", "consists essentially of", or "substantially comprises" that particular element or elements, unless otherwise stated or clearly contradicted by context (e.g., a composition described herein as comprising a particular element should be understood as also describing a composition consisting of that element, unless otherwise stated or clearly contradicted by context).
All headings and sub-headings are used herein for convenience only and should not be construed as limiting the invention in any way.
The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
The citation and incorporation of patent documents herein is done for convenience only and does not reflect any view of the validity, patentability, and/or enforceability of such patent documents.
This invention includes all modifications and equivalents of the subject matter recited in the claims and/or aspects appended hereto as permitted by applicable law.

Claims

1. Method of downhole injecting one or more treatment fluids, and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system, said method comprising the steps of
a) loading the or each treatment fluid separately into one or more fluid containers arranged in a injecting tool, each container comprising container walls surrounding the fluid in the fluid container, and an outlet opening.
b) lowering the injecting tool body into the wellbore or the well tubular to a predetermined position,
c) exposing at least part of the outside of the fluid container walls to the surrounding pressure in the wellbore,
d) Allowing at least part of each of the fluid containers walls to displace within the depositing tool body under forces exerted on the fluid container walls by the surrounding pressure in the wellbore.
e) Pumping the fluids from each fluid container into the wellbore or the well tubular.
2. The method according to claim 1, wherein at least two different fluids are injected, the method further comprising the step of: pumping each fluid out of each fluid container in a predetermined volume relative to each other.
3. The method according to claim 2, further comprising the step of using separate pumps connected to each fluid container.
4. The method according to claim 3, further comprising the step of using positive displacement pumps for pumping each fluid.
5. The method according to claim 4, further comprising the step of using a single motor for driving all the pumps.
6. The method according to claim 5, the method further comprising the steps of using pumps having a drive shaft connected to the single motor for driving each pump, and wherein the pumps are selected having a pre-determined displacement of fluids per revolution of the drive shaft being relative to each other by the same ratio as defined by the pre-determined volume of the fluids.
7. The method according to claim 1 or 2, further comprising the step of using fluid containers having container walls being elastic or plastic deformable and being collapsible under the surrounding pressure in the wellbore.
8. A downhole injecting tool for injecting at least one fluid at a pre-determined position in a wellbore and especially for providing one or more seals in an annular space between a well tubular and the surrounding formation or between pipes of a wellbore system, said downhole injecting tool comprising at least one fluid container each having a fluid container outlet connected to a pump and a motor arranged for pumping fluid out of the container and into the wellbore, and where each fluid container comprises container walls surrounding the fluid in the container, and wherein the injecting tool is constructed such that at least part of the outside of the container walls are open to the ambient pressure surrounding the injecting tool, and that the above mentioned at least part of the outside of the container walls is displaceable within the injecting tool.
9. A downhole injecting tool according to claim 8, wherein the fluid containers, and the pumps and motor are arranged inside an injection tool casing, the injection tool casing having openings allowing ambient pressure to reach at least part of the inside of the injecting tool casing containing the fluid containers.
10 A downhole injecting tool according to claim 9, comprising at least two fluid containers, and where a separate pump is connected to each fluid container.
11. A downhole injecting tool according to claim 10, wherein the pumps are positive displacement pumps.
12. A downhole injecting tool according to claim 11, wherein a single motor is arranged for driving the pumps.
13. A downhole injecting tool according to claim 12, wherein each pump has a drive shaft connected to the motor, and where the pumps are having a displacement volume per revolution defined by the selected mixing ratio between the fluids in the fluid containers.
14. A downhole injecting tool according to one of claims 9 to 13, wherein at least part of the container walls on the fluid containers are made elastic or plastic deformable and being collapsible under the downhole surrounding pressure.
15. A downhole injecting tool according to claim 14, wherein each fluid container is formed as a cartridge having a pipe having a first end extending inside the fluid container and through the container wall, and another end on the outside of the container, the other end of the pipe forming the outlet of the fluid container.
16. A downhole injecting tool according to claim 15, wherein a plurality of holes are made in the pipe at different positions along its first end in order to allow fluid in the fluid container to enter into the pipe.
PCT/EP2009/052554 2008-03-06 2009-03-04 A method and an apparatus for downhole injecting one or more treatment fluids. WO2009109599A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK09716673.0T DK2255062T3 (en) 2008-03-06 2009-03-04 Method and apparatus for injecting one or more treatment fluids into a borehole
US12/920,298 US8936097B2 (en) 2008-03-06 2009-03-04 Method and an apparatus for downhole injecting one or more treatment fluids
EP09716673.0A EP2255062B1 (en) 2008-03-06 2009-03-04 A method and an apparatus for downhole injecting one or more treatment fluids.
BRPI0909681-7A BRPI0909681B1 (en) 2008-03-06 2009-03-04 METHOD FOR SEALING AN ANNULAR SPACE BETWEEN A PIPE WELL AND FORMATION AROUND OR BETWEEN THE PIPES OF A WELL HOLE SYSTEM AND WELL INJECTION TOOL
NO09716673A NO2255062T3 (en) 2008-03-06 2009-03-04

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US3425108P 2008-03-06 2008-03-06
US61/034,251 2008-03-06
DKPA200800331 2008-03-06
DKPA200800331A DK178742B1 (en) 2008-03-06 2008-03-06 Method and apparatus for injecting one or more treatment fluids down into a borehole

Publications (1)

Publication Number Publication Date
WO2009109599A1 true WO2009109599A1 (en) 2009-09-11

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PCT/EP2009/052554 WO2009109599A1 (en) 2008-03-06 2009-03-04 A method and an apparatus for downhole injecting one or more treatment fluids.

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US (1) US8936097B2 (en)
EP (1) EP2255062B1 (en)
BR (1) BRPI0909681B1 (en)
DK (2) DK178742B1 (en)
NO (1) NO2255062T3 (en)
WO (1) WO2009109599A1 (en)

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DK178742B1 (en) 2016-12-19
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US8936097B2 (en) 2015-01-20
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DK2255062T3 (en) 2018-03-26

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