EP2341212A1 - Bohrloch-Perforatorwerkzeug - Google Patents

Bohrloch-Perforatorwerkzeug Download PDF

Info

Publication number
EP2341212A1
EP2341212A1 EP09180919A EP09180919A EP2341212A1 EP 2341212 A1 EP2341212 A1 EP 2341212A1 EP 09180919 A EP09180919 A EP 09180919A EP 09180919 A EP09180919 A EP 09180919A EP 2341212 A1 EP2341212 A1 EP 2341212A1
Authority
EP
European Patent Office
Prior art keywords
tool
charges
charge
downhole
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09180919A
Other languages
English (en)
French (fr)
Inventor
Jørgen HALLUNDBAEK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Welltec AS
Original Assignee
Welltec AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Welltec AS filed Critical Welltec AS
Priority to EP09180919A priority Critical patent/EP2341212A1/de
Priority to PCT/EP2010/070834 priority patent/WO2011080291A2/en
Publication of EP2341212A1 publication Critical patent/EP2341212A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/116—Gun or shaped-charge perforators
    • E21B43/117—Shaped-charge perforators
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction

Definitions

  • the present invention relates to a downhole perforation tool for detonation of at least one charge downhole to perforate a casing, the tool having a longitudinal direction, comprising an outer face, at least one recess provided in the outer face of the tool, at least one charge arranged in the recess, a plurality of planes transverse to the longitudinal direction of the tool, and a charge holder part for holding at least part of the charge.
  • the invention furthermore relates to a method for perforating a casing downhole.
  • Perforation of metal casings in a well is very commonly used when retracting oil from a borehole. Over time, many different designs have been developed which suit individual perforation patterns.
  • a downhole perforation tool for detonation of at least one charge downhole to perforate a casing, the tool having a longitudinal direction, comprising
  • the downhole perforation tool may further comprise a driving unit for moving the charge holder part in the time interval between the detonation of two charges.
  • This driving unit may have means for moving the charge holder part in the longitudinal direction and/or for rotation of the charge holder part around the longitudinal direction.
  • the recess may extend in the longitudinal direction and/or in the transverse direction of the longitudinal direction.
  • the recess may be helical (spiral) and extend along the outer face.
  • the recess may be circular, hexagonal, octagonal or square.
  • the recess may taper towards the centre of the charge holder part.
  • a plurality of recesses may be arranged in the outer face.
  • the charges may extend in the longitudinal direction, the recesses being arranged adjacent to each other with a distance smaller than the extension of the charges in that direction.
  • Each charge may be closed by a cap for protecting the charge.
  • the charges may be controlled by a control means.
  • the charges may be connected to the control means by means of wires or wireless communication.
  • the wires may be positioned inside the charge holder part.
  • At least four, six or eight charges may be arranged in the same transverse plane.
  • the charge holder part may be a solid part with the recesses in the outer face and a bore near its centre.
  • the recesses may be connected to the centre bore of the charge holder part.
  • one or more bore(s) may be arranged between the recess(es) and the centre bore.
  • the charge holder part may be made of a material, the strength of which is able to withstand the pressure from the detonation of the charges, such as metal.
  • the charge holder part may be reusable and rechargeable when the charges have been detonated.
  • the outer face of the tool may have a cross-sectional configuration enabling it to be moved inside a downhole casing.
  • This cross-sectional configuration may be circular, hexagon, octagonal or the like.
  • the charge holder part may be part of the outer face of the tool.
  • a housing/sleeve may be arranged outside the charges, the housing/sleeve comprising openings which are aligned with the charges arranged in the recesses.
  • the charges may be arranged essentially without any intermediate elements between them and an area to be perforated.
  • the downhole perforation tool may further comprise an anchor tool for anchoring the tool inside the casing or borehole.
  • the downhole perforation tool may comprise a stroker tool for moving at least part of the charge holder part in the longitudinal direction of the tool.
  • This invention also relates to a method for perforating a casing downhole, the method comprising the steps of introducing a downhole perforation tool inside the casing, positioning the tool in a first area to be perforated, detonating one or more charges in the first area, positioning the tool in a second area to be perforated by moving the tool along the casing and/or by rotating the charge holder part of the tool, detonating one or more charges in the second area, performing the steps of positioning and detonating in additional areas to be perforated, and retrieving the tool from the casing.
  • the tool may be retrieved from the casing subsequent to the detonation of an area, recharged with new charges, introduced into the casing again, and positioned in a new area to be perforated.
  • the invention relates to a downhole perforation tool 1 for detonation of charges 2 in a predetermined pattern to perforate a casing 15 in a well.
  • the tool 1 is submerged into a casing at a predetermined position, either by means of a driving tool, such as a downhole tractor, or by means of coiled tubing or wireline.
  • the tool 1 has a control means 8 enabling it to detonate the charges 2 in a desired pattern one by one.
  • Each charge 2 is connected to at least one switch 14 through which the firing of the charges is controlled.
  • the tool 1 is lowered into the casing 15 by means of a wireline.
  • the tool comprises an electrical motor 20, a control means 8, a driving unit 6 and a part holding the charges 5.
  • the tool 1 has a cylindrical shape, and the charges 2 are arranged in the circumference of the tool in a charge holder part 5.
  • Each charge 2 is arranged in a recess 4 spaced apart along the outer face 3 of the tool 1, and as can be seen, several charges are arranged in the same cross-sectional plane p of the tool transverse to its longitudinal direction l.
  • the charges 2 are arranged in a cavity having an open end facing the casing wall, ensuring that when detonated, each charge only penetrates the casing wall and the fluid in the casing 15 and thus not a tool housing. In this way, each charge 2 may be smaller than a charge which has to penetrate both the tool housing and the casing wall. Due to the fact that the charges 2 are smaller than the charges usually used in prior art tools, they can be arranged closer to one another. However, the charges 2 are still arranged in a pattern with a mutual distance between them which is sufficient to ensure that they do not detonate other charges 2 than intended. In this way, the charges 2 are not necessarily arranged in a pattern identical to the perforation pattern, but may both be positioned closer together in the longitudinal direction l and along the circumference of the outer face 3 of the tool 1.
  • the tool 1 comprises a driving unit 6 for moving the charge holder part 5 in the time interval between the detonation of the charges, allowing the tool to perforate the casing 15 in an optional pattern.
  • the driving unit 6 has means for moving the charge holder part 5 in the longitudinal direction I and/or for rotating the charge holder part around the longitudinal direction of the tool 1.
  • Having a driving unit 6 makes it possible to arrange the charges 2 in the pattern in which they have the smallest longitudinal and circumferential extension since the driving unit can move the charge holder part 5 in between the detonations. In this way, the perforation tool 1 is still able to perforate the casing 15 in any desired standard or non-standard pattern.
  • the charges do not also have to perforate the tool housing before perforating the casing wall, the detonation capacity of each charge can be substantially reduced, and the charges can be positioned closer together in the tool 1. It is thus possible to minimise the diameter of the tool 1 and/or reduce the length of the tool.
  • the perforation process often takes a long time since the extension of the lubricator limits the extension of the perforation tool 1.
  • the extension of the charge holder of the perforation tool is the same as that of the casing part which is to be perforated. If the casing part to be perforated is 40 feet, and the lubricator has room for a perforation tool having a charge holder of 10 feet, the perforation tool 1 has to be lowered into the well four times in order for the entire 40 feet of casing to be perforated.
  • the tool 1 of the present invention substantially reduces the number of reruns into the well.
  • a channel connects the bottom of each recess 4 to a centre hole in the charge holder part 5, and the charges 2 are thereby connected with the control means 8 and the switches 14 via wiring through the channel.
  • the channels are very narrow, meaning that when one charge 2 is detonated, only the wiring to that charge is blown away, and thus, the wiring to the other charges is not affected.
  • the charge holder part 5 of Figs. 2 and 3 is a solid cylinder positioned between the recesses 4, the channels and the centre bore 11. Each charge 2 is thus protected by a solid part 10 of the charge holder part 5, meaning that the firing of one charge does not affect the other charges.
  • the recesses 4 extend from the outer face 3 towards the centre hole of the charge holder part 5.
  • the recesses 4 all have rounded bottoms but may otherwise have any suitable shape, such as square, hexagonal, octagonal or another cross-sectional shape. When the casing has a non-circular cross-sectional shape, it is no longer able to rotate in the recess 4.
  • the charge holding part is just a frame structure inside a tool housing, and the charges are thus not protected in the same way as with the present solid tool, meaning that the distance between the charges must be increased in these prior art tools.
  • the diameter of the tool housing has been reduced opposite each charge, so that when the casing is perforated, the diameter of the tool is not substantially increased.
  • the tool 1 of the present invention there is no risk of increasing the diameter of the tool when detonating the charges 2 since the charges are fired directly into the casing wall.
  • Fig. 4 several charges 2 are arranged in the same recess 4 in the outer face 3 of the tool 1 and spaced apart by a switch 14 so that the charge furthest away from the wireline is fired first, and so on.
  • the recess 4 has a longitudinal extension in the longitudinal direction l of the tool 1 and is cut into the hollow cylindrical charge holder part 5.
  • several channels are bored into the bottom of the recess 4, enabling connection of the charges 2 and switches to the control means 8 by means of wires.
  • the recess 4 may also extend in the transverse direction of the longitudinal direction l of the tool 1 in a hollow or solid cylinder.
  • the recess 4 has a helical or spiral shape extending around the longitudinal direction l of the tool and extending along the outer face 3 of the charge holder part 5.
  • Each charge 2 is closed by a protective cap 7 to ensure that the well fluid does not penetrate the charge and cause it to malfunction.
  • each recess 4 has a width D which is larger than the distance between the recesses 4 when measured from the edge of one recess to the edge of the adjacent recess.
  • the charges 2 can be arranged in a variety of patterns in the tool 1, more or less corresponding to the desired perforation pattern.
  • one row of recesses arranged in the same cross-sectional plane p is displaced in relation to the next row of recesses so that a recess in one row is positioned opposite the middle of two recesses in the next row.
  • the charges 2 may be arranged decentralized in the charge holder part.
  • Fig. 5 two charges 2 are arranged in the same plane p, and in Figs. 1 and 4 , eight charges are arranged in the same plane. In another embodiment, more or fewer charges 2 may by arranged in the same transverse plane p.
  • the charge holder part 5 is made of a material, the strength of which is able to withstand the pressure from the detonation of the charges 2, such as metal.
  • the charge holder part is reusable and rechargeable when the charges have been detonated.
  • the perforation tool 1 and thus the charge holder part 5 have a circular cross-section configuration, however, the cross-sectional configuration may also be square, hexagon, octagonal or the like.
  • the perforation tool 1 may also have a housing/sleeve arranged outside the charges 2 so that the openings in the housing/sleeve are aligned with the charges arranged in the recesses 4.
  • the charges 2 are essentially arranged without any intermediate elements between them and an area of the casing wall to be perforated, allowing the detonation ability of the charges to be reduced enough to position them close together in the charge holder part 5.
  • the charges 2 may be arranged in an outer part of the charge holder part which may be rotatable in relation to for instance an inner part of the charge holder part.
  • the downhole perforation tool 1 may also comprise an anchor tool 12 for anchoring the tool inside the casing 15 or borehole.
  • the tool 1 further comprises a stroker tool 13 functioning as a driving unit 6 for moving at least part of the charge holder part 5 in the longitudinal direction l of the tool.
  • the stroker tool 13 is able to quickly replace the charge holder part 5 along the longitudinal direction l of the tool 1 and to rotate the charge holder part in the time interval between the detonation of the charges.
  • the perforation process is performed by introducing a downhole perforation tool 1 into the casing 15 and positioning the tool 1 in a first area of the casing to be perforated.
  • the charges 2 are detonated one or several at a time, and the tool is subsequently moved and positioned opposite a second area of the casing 15.
  • This movement may be a movement in the longitudinal direction l of the tool 1 and/or a rotation movement of the tool.
  • the movement may be of the entire tool 1 by means of a downhole tractor or a stroker tool 13, or by adjusting the length of the wireline or of part of the tool, e.g. the charge holder part 5, by means of the stroker tool 13.
  • When positioned in the second area one or more charges 2 are fired again.
  • the tool 1 has performed its detonations, it is retrieved from the casing 15. If the perforation process is not concluded, the tool 1 is recharged with new charges introduced into the casing 15 again, and positioned in a new area to be perforated
  • the downhole perforation tool 1 when a predetermined perforation pattern of a casing 15 downhole is to be performed, the downhole perforation tool 1 according to the invention is loaded with charges 2 and lowered into the casing.
  • the tool 1 is positioned in the first detonation area, and some of the charges 2 are detonated so that they perforate the casing 15 directly.
  • the tool 1 is moved longitudinally and/or turned so that the other charges 2 face the casing 15 in the position where detonation is intended.
  • the next step is that the intended charges 2 are detonated so that they perforate the casing directly as well.
  • the above sequences are performed until the predetermined perforation pattern is obtained, or until the tool needs to be recharged.
  • the detonation sequence of the tool 1 may advantageously be set up to detonate in the predetermined perforation pattern of the casing 15 by detonating one or more charges 2 in different transverse planes p and subsequently move and/or rotate the tool 1 and detonate one or more other charges in the same planes as the first detonation sequence and/or in other transverse planes.
  • a casing By a casing is meant all types of pipes, tubings, tubulars etc. used downhole in relation to oil or natural gas production.
  • fluid or well fluid any kind of fluid which may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • a downhole tractor can be used to push the tools all the way into position in the well.
  • a downhole tractor is any type of driving tool capable of pushing or pulling tools in a well, such as a Well TractorR.
EP09180919A 2009-12-29 2009-12-29 Bohrloch-Perforatorwerkzeug Withdrawn EP2341212A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09180919A EP2341212A1 (de) 2009-12-29 2009-12-29 Bohrloch-Perforatorwerkzeug
PCT/EP2010/070834 WO2011080291A2 (en) 2009-12-29 2010-12-29 Downhole perforation tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09180919A EP2341212A1 (de) 2009-12-29 2009-12-29 Bohrloch-Perforatorwerkzeug

Publications (1)

Publication Number Publication Date
EP2341212A1 true EP2341212A1 (de) 2011-07-06

Family

ID=42174502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09180919A Withdrawn EP2341212A1 (de) 2009-12-29 2009-12-29 Bohrloch-Perforatorwerkzeug

Country Status (2)

Country Link
EP (1) EP2341212A1 (de)
WO (1) WO2011080291A2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016115452A1 (en) * 2015-01-16 2016-07-21 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9562421B2 (en) 2014-02-08 2017-02-07 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9845666B2 (en) 2014-02-08 2017-12-19 Geodynamics, Inc. Limited entry phased perforating gun system and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113994070A (zh) 2019-05-16 2022-01-28 斯伦贝谢技术有限公司 模块化射孔工具
USD1016958S1 (en) 2020-09-11 2024-03-05 Schlumberger Technology Corporation Shaped charge frame
CN116472395A (zh) * 2020-11-13 2023-07-21 斯伦贝谢技术有限公司 定向射孔工具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494256A (en) * 1945-09-11 1950-01-10 Gulf Research Development Co Apparatus for perforating well casings and well walls
US2758543A (en) * 1950-04-10 1956-08-14 Clarence W Grandin Cutting method and apparatus
US4676309A (en) * 1985-03-18 1987-06-30 Exxon Production Research Company Linear plane perforator
US5033553A (en) * 1990-04-12 1991-07-23 Schlumberger Technology Corporation Intra-perforating gun swivel
DE19807386A1 (de) * 1997-02-28 1998-09-03 Dynamit Nobel Ag Sprengperforationsvorrichtung für Bohrlöcher
US20050150687A1 (en) * 2004-01-08 2005-07-14 Vicente Jose G. Perforating system and method
US20050178551A1 (en) * 2000-02-15 2005-08-18 Tolman Randy C. Method and apparatus for stimulation of multiple formation intervals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682834A (en) * 1950-05-04 1954-07-06 Joseph H Church Apparatus for utilizing shaped charges
US5829538A (en) * 1997-03-10 1998-11-03 Owen Oil Tools, Inc. Full bore gun system and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494256A (en) * 1945-09-11 1950-01-10 Gulf Research Development Co Apparatus for perforating well casings and well walls
US2758543A (en) * 1950-04-10 1956-08-14 Clarence W Grandin Cutting method and apparatus
US4676309A (en) * 1985-03-18 1987-06-30 Exxon Production Research Company Linear plane perforator
US5033553A (en) * 1990-04-12 1991-07-23 Schlumberger Technology Corporation Intra-perforating gun swivel
DE19807386A1 (de) * 1997-02-28 1998-09-03 Dynamit Nobel Ag Sprengperforationsvorrichtung für Bohrlöcher
US20050178551A1 (en) * 2000-02-15 2005-08-18 Tolman Randy C. Method and apparatus for stimulation of multiple formation intervals
US20050150687A1 (en) * 2004-01-08 2005-07-14 Vicente Jose G. Perforating system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9562421B2 (en) 2014-02-08 2017-02-07 Geodynamics, Inc. Limited entry phased perforating gun system and method
US9845666B2 (en) 2014-02-08 2017-12-19 Geodynamics, Inc. Limited entry phased perforating gun system and method
WO2016115452A1 (en) * 2015-01-16 2016-07-21 Geodynamics, Inc. Limited entry phased perforating gun system and method

Also Published As

Publication number Publication date
WO2011080291A3 (en) 2011-09-09
WO2011080291A2 (en) 2011-07-07

Similar Documents

Publication Publication Date Title
RU2765923C1 (ru) Внутрискважинный инструмент и способ для гидроразрыва множества боковых стволов скважины
EP0604568B1 (de) Im bohrloch aktiviertes system zur perforierung der bohrlochwand
US10001001B2 (en) Apparatus and method for perforating a wellbore casing, and method and apparatus for fracturing a formation
US8127846B2 (en) Wiper plug perforating system
US10113401B2 (en) Apparatus and method employing perforating gun for same location multiple reservoir penetrations
EP2341212A1 (de) Bohrloch-Perforatorwerkzeug
US6708761B2 (en) Apparatus for absorbing a shock and method for use of same
RU2696738C2 (ru) Определение места прихвата колонны труб в стволе скважины
US20040221993A1 (en) Method for removing a tool from a well
US10287860B2 (en) Downhole mechanical tubing perforator
WO2015020747A1 (en) Automatic packer
WO1993006333A1 (en) Downhole activated process and apparatus for centralizing pipe in a wellbore
US20200032602A1 (en) Latch-and-perf system and method
WO2016039734A1 (en) Perforating gun with integrated retaining system
WO2015073018A1 (en) Assembling a perforating gun string within a casing string
WO2016039735A1 (en) Charge tube with self-locking alignment fixtures
US9482066B2 (en) Downhole tool activation
US10208572B2 (en) Apparatus and method for perforating a subterranean formation
US10677025B2 (en) Apparatus and method employing retrievable landing base with guide for same location multiple perforating gun firings
US11268356B2 (en) Casing conveyed, externally mounted perforation concept
EP2834446B1 (de) Gehäusefensteranordnung
DK180866B1 (en) Apparatus for performing multiple downhole operations in a production tubing
US20200003024A1 (en) Casing conveyed, externally mounted perforation concept
US20030047313A1 (en) Drillable core perforating gun and method of utilizing the same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20120110