EP2245260B1 - Dispositif et procédé pour isoler une section d'un forage - Google Patents

Dispositif et procédé pour isoler une section d'un forage Download PDF

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Publication number
EP2245260B1
EP2245260B1 EP09703252.8A EP09703252A EP2245260B1 EP 2245260 B1 EP2245260 B1 EP 2245260B1 EP 09703252 A EP09703252 A EP 09703252A EP 2245260 B1 EP2245260 B1 EP 2245260B1
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EP
European Patent Office
Prior art keywords
setting
packer
straddle
straddle packer
setting tool
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.)
Not-in-force
Application number
EP09703252.8A
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German (de)
English (en)
Other versions
EP2245260A1 (fr
Inventor
Bård Martin TINNEN
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.)
Tendeka AS
Original Assignee
Well Technology AS
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Filing date
Publication date
Application filed by Well Technology AS filed Critical Well Technology AS
Publication of EP2245260A1 publication Critical patent/EP2245260A1/fr
Application granted granted Critical
Publication of EP2245260B1 publication Critical patent/EP2245260B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves

Definitions

  • This invention regards a device and a method for installation, setting and/or operation of a tool string in a well.
  • the present invention regards a device and a method for isolating a section of a wellbore, the device including a straddle packer and associated systems for selectively setting of at least one upper packer element, at least one lower packer element and at least one anchoring device of the straddle packer.
  • Straddle packers are commonly used for zone isolation in wells related to the production of hydrocarbons. Typically, straddle packers are utilised to shut off unwanted production, such as water or in some cases gas, that origins from reservoir zones in an upper or middle section of the wells producing interval, so that fluids, such as oil, from lower lying intervals still can be produced. Straddle packers as long as 50-100 meters and more have in some cases been required to shut off unwanted production.
  • Publication US 6,883,610 discloses straddle packer systems and methods of using them for downhole isolation of zones for fracturing treatment, the system including upper and lower seal systems having resiliently flexible sealing elements hydraulically and operatively connected to one another which are responsive to an increase in hydraulic pressure for setting the sealing elements at a first hydraulic pressure threshold.
  • Prior art subsea well service operations applies tailor made well service vessels and equipment, such as subsea lubricators, in order to service subsea wells in an increasingly more cost effective manner.
  • Such methods for subsea well service still suffer from distinctive restrictions related to types of operations that can be performed.
  • this applies for operations involving long and bulky well intervention tool strings.
  • the task of getting long straddle packers into a subsea well by means of a RLWI operation is a major challenge.
  • Norwegian patent application NO 20051257 owned by the applicant of the present application, discloses a method for intervening subsea wells with very long toolstrings in conjunction with RLWI operations, and is included herein by reference.
  • Publication US 6,257,338 B1 discloses a device for isolating a section section of a wellbore, the device including a straddle packer and a setting tool for selectively setting of at least one upper packer element and at least one lower packer element, wherein the setting tool includes at least one setting element for setting the at least one lower packer element.
  • the object of the invention is to provide a novel and alternative system and method for installing and operating long and bulky well servicing tools such as straddle packers in subsea wells as well as other relevant well cases.
  • One main feature of the invention related to straddle packers, is the removal of the need for a setting tool of similar length as the straddle packer.
  • the proposed way to achieve this is to provide for an autonomous setting of one or multiple components, such as the lower packer element and anchor.
  • such autonomous setting is operator controlled by means of a wireless signal sent to activate the actual components at the determined time for installation.
  • the present invention regards a device for isolating a section of a wellbore, the device includeing a straddle packer and associated systems for selectively setting of at least one upper packer element, at least one lower packer element and at least one anchoring device of the straddle packer, the at least one setting element of the straddle packer is operated independent from other setting elements.
  • straddle packers involve components such as a top section (where the power module normally is located), a centre rod and a bottom collapsible mandrel initially being held expanded and in place by means of a shear pin arrangement.
  • the top section and the bottom mandrel are forced towards each other by means of the centre rod, powered by a pyrotechnical charge, an electric pump, wellbore pressure, pressurised gas chambers or similar.
  • the shear pin arrangement of the bottom mandrel shears, whereupon the mandrel collapses and becomes retrievable through the straddle packer body. Because of this arrangement with the mandrel and feed-trough/centre rod, the setting tool has to be made of similar length as the straddle packer itself.
  • the communication means includes means for transmitting and receiving wireless signals for controlling the setting element of the straddle packer.
  • the wireless communications means includes at least one transmitter and at least one receiver and/or at least one transceiver.
  • the communication means associated with the activation of straddle packer element(s) and/or anchor(s) could be direct means such as electrical, fibreoptic or hydraulic connections.
  • said means for activation could also comprise sensors monitoring changes or desired set-values of wellbore parameters.
  • the latter could as an example be a pressure or temperature sensor, associated with a timer device that trigger element/anchor activation at a predetermined time after a sensor reading a defined set-value.
  • One of the most typical applications would be the installation of straddle packers in subsea wells, but could also be the case of setting straddle packers, or other tools, in other types of wells, in order to save cost, time, overcome rigging constraints and similar.
  • pulling tools intended for the retrieval of a straddle packer could be provided with similar transmitter systems as the setting tool described above, and straddle packers provided with a second receiver and activation system to facilitate retrieval of the packer in a similar fashion and philosophy as for the setting process.
  • the axial length of the setting tool is less than the axial length of the straddle packer.
  • the axial length of the setting tool is in one embodiment less than three quarter of the axial length of the straddle packer.
  • the axial length of the setting tool is less than one half of the axial length of the straddle packer.
  • the axial length of the setting tool is less than one quarter of the axial length of the straddle packer.
  • At least one separate setting element is integrated in a portion of a tubular body of the straddle packer.
  • a method for isolating a section of a wellbore including setting a straddle packer using a system for selectively setting of at least one upper packer element, at least one lower packer element and at least one anchoring device of the straddle packer, wherein the method comprising operating at least one setting element of the setting tool independent from other setting elements.
  • a device for operating elements such as valves, barrier elements and actuators related to wellbore tooling, the device including systems for selectively operating at least one of said valves, barrier elements and/or actuators, wherein at least one system element can be operated independent from other system elements.
  • valves such as valves, barrier element and actuators related to wellbore tooling
  • the device including systems for selectively operating at least one of said valves, barrier elements and/or actuators, wherein at least one system element being operated independent from other system elements.
  • FIG 1a and 1b illustrate in a schematic manner an overall system according to prior art and according to a preferred embodiment of the invention, respectively, in order to facilitate the description of innovative aspects.
  • Both figures 1a and 1b describes a straddle packer 1 (reference numeral 1' for the prior art straddle packer), provided with a top packer element 2, a bottom packer element 3 and an anchor 4.
  • Other elements known to be associated with straddle packers, such as additional anchoring modules and/or expansion joints are not shown in Figures 1a and 1b , but a person skilled in the art would easily recognise that such modules as well as other system modules as per se could be included in a preferred embodiment of the invention.
  • the straddle packers 1 and 1' in Figures 1a and 1b are both prepared for setting.
  • an as per se setting tool 100 comprises the top section 5, a collapsible mandrel 9, and a limited length feed-through rod 8.
  • the cable head 6 and cable 7 are also illustrated to outline the complete well service tool string.
  • the setting tool system for the straddle packer comprises more than one setting unit/element, and that said setting elements can be operated independent of each other.
  • the as per se setting tool top section 5 is anchored to the upper sections of the straddle packer 1 by means of a collapsible mandrel 9, through the limited length feed-through rod 8.
  • the feed-through rod 8 for the straddle packer 1 runs through the top section only of the straddle packer 1.
  • the feature of axial length L1 of the as per se setting tool 100 being significantly shorter than the axial length L2 of the straddle packer 1 is one essential characteristic for the present invention.
  • the axial length L1 of the as per se setting tool 100 is less than three quarter of the axial length L2 of the straddle packer 1.
  • the axial length L1 of the as per se setting tool 100 is less than one half of the axial length L2 of the straddle packer 1.
  • the axial length L1 of the as per se setting tool 100 is less than one quarter of the axial length L2 of the straddle packer 1.
  • the bottom setting element 10 is used for setting of the bottom packer element 3.
  • the setting tool 5 is provided with a transmitter 11 of a wireless signal that is used to transmit an activation command 12 to the bottom setting element 10 in order to set this by means of expansion.
  • the bottom setting element 10 is provided with a receiver and activation unit 14 that detects the received setting command 13, translates it as known per se initiates the setting sequence of the bottom packer element 3.
  • the bottom setting element 10 is a centred device, i.e. the bottom setting element 10 is substantially coaxial with the straddle packer.
  • the bottom setting element 10 could be designed to disappear by means of disintegration, mechanical retraction or other means as known per se after the bottom packer element 3 is set.
  • the bottom setting element 10 is built into a wall of the straddle packer 1.
  • the bottom setting element 10 may be regarded as a setting tool being dependent upon the as per se setting tool 100 comprising communication means.
  • the setting tool top section 5 could be of the same type as the bottom setting element 10, associated with similar communication and activation means.
  • anchor(s) 4 could be associated with similar type setting element 10, associated with similar communication and activation means.
  • all elements to be operated can be operated partly or totally independent from other elements to be operated, using similar type setting element 10, associated with similar communication and activation means.
  • the bottom element 10 forms a seal against the inner wall of the straddle packer 1, so that fluids can not flow into the straddle packer 1 from below during deployment into a subsea well.
  • This feature could be required in subsea deployment operations where pressure seals between the potentially high-pressurised wellbore and the marine environment on the outside of the wellhead might be a necessity.
  • such seal requirement is achieved by means of a sealing function between the setting tool 5 and the top section of the straddle packer 1. A person skilled in the art will be familiar with ways of obtaining such a seal. For this reason, sealing elements are not shown in detail in the drawing.
  • FIG 2 illustrates an alternative embodiment of the bottom setting element 10 of the straddle packer 1. Note that only a portion of the straddle packer 1 wall located at the right side of the straddle packer centre line CL is shown in figure 2 .
  • the receiver 14 reads the received setting command 13.
  • An electronics module 21 interrogates the receiver 14 in order to interpret registrations from the sensor/receiver 14. When there is a positive detection of an activation signal, i.e. an initiating command, the electronics emit a signal/impulse to fire a detonator 22 that again ignites a pyrotechnic charge 23 that is adapted to fit inside a slot in the wall of the straddle packer 1.
  • the pyrotechnic charge 23 As the pyrotechnic charge 23 burns, it generates gas that imposes a large pressure on a piston 24.
  • the piston 24 is forced downwards, and pushes a fluid 25, such as hydraulic oil, downwards.
  • said fluid 25 forces a wedge-shaped element 26 downwards and forces this to set a packer element 3 against the tubing wall 27.
  • the wedge shaped element 26 is replaced by means of an alternative element with similar function - i.e. to compress and support the bottom packer element 3.
  • the receiver 14 and associated electronics module 21 is powered by means of a battery module 28.
  • figure 2 this only illustrates one of a variety of ways of designing a system that sets (in this case) the lower packer element 3 of the straddle (or activates any element in a general application).
  • Other possible methods that could be applied involve:
  • Figure 3a and 3b illustrates two essential system modules of a preferred embodiment for intervening a long straddle packer 1 in a subsea well.
  • FIG 3a is merely a preferred embodiment of the invention disclosed in NO 20051257 , including the following modules and components:
  • Figure 3b shows the schematics of a preferred straddle packer 1 to be used in conjunction with the SDLM 31 and other seabed stack components shown in figure 3a .
  • the straddle packer 1 is provided with a top packer element 2, a bottom packer element 3 and an anchor 4.
  • the as per se setting tool 100 comprises a top section 5, a collapsible mandrel 9, and a limited length feed-through rod 8.
  • the cable head 6 and cable 7 are also illustrated.
  • a bottom setting element 10 used for setting of the bottom packer element 3.
  • the "as per se" setting tool 100 top setting element 5 is provided with a transmitter 11 of a wireless signal that is used to transmit a setting command 12 (see figure 1b ) to the bottom setting element 10.
  • the latter is provided with a receiver and activation unit 14 that detects the received setting command 13 (see figure 1b ) translates it and initiates the setting sequence of the bottom packer element 3.
  • the bottom setting element 10 is built into the wall of straddle packer 1.
  • the transmitter 11 could be located elsewhere than on the as per se setting tool 100 top setting element 5, as a module of its own or as part of other system modules. This is not further described herein.
  • the transmitter 11 and receiver 14 are replaced by transceivers.
  • the transceiver located in the top setting element includes a sensor that can record any indications that the setting process has taken place.
  • a quartz crystal sensor that "listens" for the sound created when detonating e.g. the detonator 22 shown in figure 2 .
  • Figure 4 illustrates an initial stage of a subsea intervention process from a RLWI vessel. More specifically, figure 4 illustrates the process of lowering a long straddle packer 1 assembly trough the open sea.
  • a surface vessel 41 tailored for riserless well intervention (RLWI) is used in conjunction with a seabed stack 42, comprising a SDLM 31, LRP 35, hang-off spool 38 and, in this embodiment, a small section of lubricator riser 301 in order to deploy a long straddle packer 1 into the subsea well 43.
  • RLWI riserless well intervention
  • Steps required for flushing, pressure testing as well as monitoring parameters are not described in detail here. However, any person skilled in the art would be able to identify the need for such actions as well as the most appropriate location of related system components and also the most relevant sequence of operation with respect to these actions. Flushing, pressure testing and monitoring systems could be located anywhere on the seabed stack, for example built into the SDLM 31, the LRP 35, the hang off spool 38 or other location or combination of locations.
  • Figure 5 illustrates the first step of system deployment, i.e. bringing the straddle packer 1 assembly from the marine environment into the pressurised well environment.
  • a positioning procedure is performed in order to position the bottom packer element 3 and the bottom setting element 10 correct with respect to the test valves (gate valves) 36a and 36b and the dynamic seal 32, an anti-blowout device 33 of the SDLM 31. Said positioning is performed in a way known per se.
  • the dynamic seal 32, and an anti-blowout device 33 of the SDLM 31 is engaged to the tubing wall of the straddle packer 1.
  • a person skilled in the art will understand that it is of importance that no mechanical engagement is made to the bottom packer element 3 and the bottom setting element 10 in order to avoid damage to these. Hence, a proper positioning procedure is performed prior to engagement.
  • the bottom packer element 3 and bottom setting element 10 are built robust enough or with a sufficient protection to allow for mechanical engagement onto these sections as well, reducing the requirements for a strict positioning of the straddle packer 1.
  • Figure 6 illustrates the second step of system deployment. Subsequent the required flushing, pressure testing and monitoring actions, the test valves (gate valves) 36a and 36b are opened and the straddle packer 1 is lowered into the wellbore. The lowering operation is stopped prior to the anchor 4 entering the dynamic seal 32 of the SDLM 31. It is important to stop at such location as the anchor 4 might cause damage to the dynamic seal 32 if lowered into this. Also, such event could cause a breach of barrier requirements. In a preferred embodiment of the invention, positioning systems and/or mechanical or other "halt" systems are included to facilitate the correct positioning of the anchor 4 with respect to the dynamic seal 32. Upon finalising a correct positioning, the top of the cable head 6 should be fully contained inside the lubricator riser 301.
  • a grease injection head 62 is mounted on top of the lubricator riser 301.
  • Figure 7 illustrates an embodiment of the invention, where the dynamic seal 32 and the anti-blowout device 33 are radially disengaged from the straddle packer 1 whereupon this is run into the wellbore in order to perform the desired operation.
  • Figure 8a and 8b illustrates system installation in the downhole part of the well. More specifically, figure 8a illustrates the straddle packer 1 being positioned with respect to an upper perforated section 80 by aligning the bottom packer element 3 with a non-perforated section 80' of a casing/liner 81. The non-perforated section 80' is located below said upper perforated section 80. The top packer element 2 and anchor 4 are aligned with a non-perforated section 80" of the wells casing/liner 80 above the perforated section 80. Hence, the straddle packer 1 is aligned in order to fully seal off and isolate perforation 80.
  • Figure 8b illustrates the straddle packer 1 after setting/engagement of bottom packer element 3, top packer element 2 and anchor 4. Also, figure 8b illustrates emission of a wireless activation signal 12 from transmitter 11 of the setting tool 5.
  • the activation signal 12 is received as signal 13 by the receiver and activation unit 14 that is located in the proximity to the bottom packer element 3.
  • receiver and activation unit 14 Upon receiving a correct message 13, receiver and activation unit 14 initiates and performs the process of setting bottom packer element 3, either directly or indirectly through a bottom setting element 10 as illustrated in figures 1 and 2 .
  • the straddle packer 1 assembly could comprise more than one anchor 4.
  • a bottom anchor 4 would enable an installation procedure where the bottom packer element 3 and a bottom anchor (not shown) is set first, whereupon a pull test by means of applying tension to the cable 7 is performed to verify a successful setting of this part of the straddle packer 1. Subsequently, the top packer element 2 and anchor 4 can be set.
  • top and bottom anchors are commonly used if an expansion joint is included in the straddle packer 1. Such expansion joints could be required if expected temperature differences in the well exceed certain limits, or if the straddle packer 1 is installed across expansion joints in the well to fix leakages. A person skilled in the art would recognise all such considerations, and no further reference is given herein.
  • Figure 9 illustrates schematically an installed straddle packer 1 in a producing well after the as per se setting tool 100 with associated elements are retrieved, and production of the well is re-established. As can be seen, no fluids will now be produced from the upper perforated section 80, whereas fluids from the lower lying zone 91 are produced through straddle packer 1.
  • Figure 10 illustrates retrieval of the setting tool assembly from the well.
  • Figure 10 shows the as per se setting tool 100 and accessories after retrieval into the top section of the seabed stack 42. Further, the figure shows the lower end of the seabed stack.
  • valves 36a and 36b are shut. Thereupon, appropriate flushing, pressure testing and monitoring actions are performed prior to disconnecting the grease injection head 62. Then, relevant steps described in the prior sections are reversed in order to retrieve the packer setting string 101 and seabed stack 42 to the surface and thereby finalizing the straddle packer installation operation.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Gasket Seals (AREA)

Claims (9)

  1. Dispositif pour isoler une section d'un puits de forage, le dispositif englobant une garniture d'étanchéité double (1) et un outil de pose (100) pour la mise en place sélective d'au moins un élément supérieur de la garniture d'étanchéité (2), d'au moins un élément inférieur de la garniture d'étanchéité (3) et d'au moins un dispositif d'ancrage (4) de la garniture d'étanchéité double (1), l'outil de pose (100) englobant au moins un élément de pose (10) destiné à la mise en place du au moins un élément inférieur de la garniture d'étanchéité (3), caractérisé en ce que le au moins un élément inférieur de la garniture d'étanchéité (3) est actionné indépendamment des autres éléments de pose (2) par un moyen de communication sans fil (11, 14), comprenant un émetteur (11), agencé dans l'outil de pose (100), et un récepteur (14) agencé dans l'élément de pose (10).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'émetteur (11) et le récepteur (14) englobent un émetteur-récepteur.
  3. Dispositif selon la revendication 1, caractérisé en ce que la longueur axiale L1 de l'outil de pose (100) est inférieure à la longueur axiale L2 de la garniture d'étanchéité double (1).
  4. Dispositif selon la revendication 1, caractérisé en ce que la longueur axiale de l'outil de pose (100) représente moins des trois quarts de la longueur axiale de la garniture d'étanchéité double (1).
  5. Dispositif selon la revendication 1, caractérisé en ce que la longueur axiale de l'outil de pose (100) représente moins de la moitié de la longueur axiale de la garniture d'étanchéité double (1).
  6. Dispositif selon la revendication 1, caractérisé en ce que la longueur axiale de l'outil de pose (100) représente moins d'un quart de la longueur axiale de la garniture d'étanchéité double (1).
  7. Dispositif selon la revendication 1, caractérisé en ce qu'au moins un élément de pose séparé (1) est intégré dans une partie d'un corps tubulaire (27) de la garniture d'étanchéité double (1).
  8. Procédé d'isolation d'une section d'un puis de forage, le procédé englobant l'étape de pose d'une garniture d'étanchéité double (1) par l'intermédiaire d'un outil de pose (100) pour la mise en place sélective d'au moins un élément supérieur de la garniture d'étanchéité double (2), d'au moins un élément inférieur de la garniture d'étanchéité (3) et d'au moins un dispositif d'ancrage (4) de la garniture d'étanchéité double (1), caractérisé en ce que le procédé comprend l'étape d'actionnement du au moins un élément inférieur de la garniture d'étanchéité double (3) indépendamment des autres éléments de pose par l'intermédiaire d'un élément de pose (10) contrôlé par un moyen de communication sans fil, comprenant un émetteur (11), agencé dans l'outil de pose (100), et un récepteur (14), agencé dans l'élément de pose (10).
  9. Procédé selon la revendication 8, caractérisé en ce que l'outil de pose (100) a une longueur axiale considérablement inférieure à la longueur axiale de la garniture d'étanchéité double (1).
EP09703252.8A 2008-01-24 2009-01-22 Dispositif et procédé pour isoler une section d'un forage Not-in-force EP2245260B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20080453A NO332409B1 (no) 2008-01-24 2008-01-24 Anordning og fremgangsmate for a isolere en seksjon av et bronnhull
PCT/NO2009/000026 WO2009093913A1 (fr) 2008-01-24 2009-01-22 Dispositif et procédé pour isoler une section d'un forage

Publications (2)

Publication Number Publication Date
EP2245260A1 EP2245260A1 (fr) 2010-11-03
EP2245260B1 true EP2245260B1 (fr) 2013-09-25

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US (1) US20100307774A1 (fr)
EP (1) EP2245260B1 (fr)
NO (1) NO332409B1 (fr)
WO (1) WO2009093913A1 (fr)

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US11555366B2 (en) 2019-10-29 2023-01-17 Archer Oil Tools As Drill pipe string conveyed retrievable plug system
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EP2245260A1 (fr) 2010-11-03
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NO20080453L (no) 2009-07-27
NO332409B1 (no) 2012-09-17

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