WO1996004457A1 - Dispositif et procede pour realiser une saignee dans une formation souterraine - Google Patents

Dispositif et procede pour realiser une saignee dans une formation souterraine Download PDF

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Publication number
WO1996004457A1
WO1996004457A1 PCT/EP1995/003091 EP9503091W WO9604457A1 WO 1996004457 A1 WO1996004457 A1 WO 1996004457A1 EP 9503091 W EP9503091 W EP 9503091W WO 9604457 A1 WO9604457 A1 WO 9604457A1
Authority
WO
WIPO (PCT)
Prior art keywords
saw arm
housing
cutting device
well
longitudinal axis
Prior art date
Application number
PCT/EP1995/003091
Other languages
English (en)
Inventor
Brent Reynolds Ross
Robert Nicholas Worrall
Original Assignee
Shell Internationale Research Maatschappij B.V.
Shell Canada Limited
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 Shell Internationale Research Maatschappij B.V., Shell Canada Limited filed Critical Shell Internationale Research Maatschappij B.V.
Priority to DK95929072T priority Critical patent/DK0774039T3/da
Priority to NZ291437A priority patent/NZ291437A/en
Priority to BR9508463A priority patent/BR9508463A/pt
Priority to RU97103211A priority patent/RU2137912C1/ru
Priority to AU32567/95A priority patent/AU682280B2/en
Priority to EP95929072A priority patent/EP0774039B1/fr
Priority to DE69503251T priority patent/DE69503251T2/de
Publication of WO1996004457A1 publication Critical patent/WO1996004457A1/fr
Priority to NO19970400A priority patent/NO312421B1/no

Links

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
    • 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
    • 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
    • E21B11/00—Other drilling tools
    • E21B11/06—Other drilling tools with driven cutting chains or similarly driven tools

Definitions

  • the present invention relates to a device and method for making a slot adjacent to a well traversing an underground formation.
  • USA patent specification No. 3 225 828 discloses a downhole slot cutting device comprising a circular slot cutting wheel. During use of the known device the cutting wheel is rotated while moving it partly outside its housing to cut a slot in the surrounding casing or wellbore, whereupon the cutting wheel is retracted again into the housing and the device is withdrawn from the well.
  • Other devices employing a circular slot cutting wheel are disclosed in US patent specifications No. 4,106,561 and 4,220,201.
  • a drawback of the known slot cutting devices is that the depth of the slot made in the underground formation is relatively small as the maximum extension of the cutting wheel is less than 50% of the diameter of the borehole.
  • the apparatus comprises a saw arm which is hingeably joined to a housing such that the saw arm is hingeable between a first position wherein the saw arm extends substantially parallel to a longitudinal axis of the housing and a second position wherein the saw arm extends in a direction away from the longitudinal axis of the housing.
  • the saw arm is equipped with an endless chain on which a series of cutting elements are mounted and with means for inducing the chain to rotate around the saw arm.
  • the saw arm is formed by an oblong blade and the means for inducing the endless chain to rotate around the saw arm comprises a drive shaft which is driven by a hydraulic positive displacement motor of the Moineau type.
  • the device may comprise a hydraulic piston assembly and a hingeing mechanism which induces the saw arm to gradually hinge towards the second position in response to the hydraulic pressure difference across the motor and a spring mechanism is present which induces the saw arm to hinge back towards the first position in the absence of a hydraulic pressure difference across the motor.
  • the hingeing mechanism comprises a spur gear which is fixed to the supported end of the saw arm, and the piston assembly carries a teethed bar of which the teeth cooperate with the spur gear.
  • the method according to the invention comprises the steps of lowering into the well a cutting device comprising a saw arm which is hingeably joined to a housing and which carries an endless chain provided with cutting elements; and inducing the endless chain to rotate around the saw arm while gradually hingeing the saw arm from a first position in which the saw arm extends substantially parallel to a longitudinal axis of the housing towards a second position m which the saw arm extends in a direction away from said longitudinal axis.
  • the saw arm is hinged back to the first position and the cutting device is withdrawn from the well or moved towards another downhole location where a slot is to be cut.
  • Figure 1 shows schematically and not to scale a partial cross- section of a vertical well wherein the cutting device according to the present invention is arranged;
  • Figure 2 shows schematically a partial cross-section of the cutting device, drawn to a scale which differs from the scale of Figure 1.
  • the well 1 comprises a borehole 3 in which a casing 5 has been installed.
  • the annular space between the casing 5 and the wall of the borehole 3 is filled with cement 7.
  • the cutting device 10 of the present invention comprises a housing 11 and a saw arm 15 which is hingeably joined to the housing 11.
  • the saw arm 15 is surrounded by an endless chain 24 provided with cutting elements 25.
  • the cutting device 10 further includes a device 17 for hingeing the saw arm 15 relative to the housing 11, a motor (not shown), and a transmission system 20 for inducing the endless chain 24 to rotate around the saw arm 15.
  • the cutting device 10 is suspended within the well 1 at the lower end of a pipe 21.
  • the saw arm 15 is maintained in a first position wherein the saw arm 15 extends parallel to the longitudinal axis I of the housing 11.
  • the motor is activated to drive the endless chain 24.
  • the saw arm 15 is gradually hinged towards a second position wherein the saw arm 15 extends in a direction away from the longitudinal axis I of the housing 11. As shown in Figure 1, in the second position the saw arm 15 extends perpendicular to the longitudinal axis I of the housing 11.
  • the cutting device 11 is displaced upwards through the well 1, and the cutting elements 25 on the endless chain 24 cut an elongated slot 23 through the casing 5, the cement annulus 7 and the surrounding formation 2.
  • the saw arm 15 is hinged back to the first position, and the cutting device 10 is withdrawn from the well 1.
  • the surface area on each face of the elongated slot 23 is the length of the elongated slot 23 times the , depth of the slot 23 which is the dimension of the slot perpendicular to the well 1.
  • the length of the saw arm 15 is so selected that the depth of the elongated slot 23 is between 0.25 and 3.0 times or greater than the diameter of the drilled borehole 2, and suitably between 0.5 and 1.50 times the diameter of the drilled borehole 2.
  • the cutting device 10 shown in Figure 1 will be described in more detail with reference to Figure 2.
  • the cutting device 10 comprises a housing 11 and a saw arm 15, which is hingeably joined to the housing 11.
  • the saw arm 15 is rotatable between a first position wherein the saw arm 15 extends parallel to the longitudinal axis of the housing 11 and a second position wherein the saw arm 15 extends in a direction away from the longitudinal axis of the housing 11, as shown in Figure 2.
  • the cutting device further includes a device 17 for hingeing the saw arm 15 relative to the housing 11, and a motor 27 provided with a splined telescopic output " shaft 28 and a transmission system 20 for inducing an endless chain 24 provided with cutting elements 25 to rotate around the saw arm 15.
  • the endless chain 24 passes over a pulley or socket wheel 29 which is arranged at the supported end of the saw arm 15.
  • the pulley or socket wheel 29 is connected to a drive shaft 30, " which is rotatably joined to the housing 11 by a bearing assembly (not shown) .
  • the direction of the drive shaft 30 is perpendicular to the longitudinal axis I of the housing 11, and the saw arm 15 is hingeably joined to the drive shaft 30.
  • the drive shaft 30 is in its turn driven by the transmission system 20.
  • the transmission system comprises a straight or helical bevel gear, having a driven gear wheel 31 joined to the drive shaft 30 and a driving gear wheel 32 attached to the lower end of the telescopic output shaft 28 of the motor 27.
  • the telescopic output shaft 28 is supported near the driving gear wheel 32 by means of a support (not shown) that prevents axial and lateral displacement of the end of the telescopic output shaft 28.
  • the device 17 for hingeing the saw arm 15 includes a device 35 causing a bar 37 to translate in the longitudinal direction of the housing 11 and a device 39 which converts the translation of the bar 37 into rotation of the saw arm 15.
  • the device 39 comprises a spur gear 40 co-operating with teeth 41 on the bar 37.
  • the spur gear 40 is provided with an arm 42 which is joined to the saw arm 15 to transmit the rotation of the spur gear 40 to the saw arm 15.
  • the device 35 causing the bar 37 to translate in the longitudinal direction of the housing 11 comprises a piston 45 provided with an opening 46 and a tubular driver assembly 48, which tubular driver assembly 48 comprises an outer tube 49 and an inner tube 50.
  • the upper end of the outer tube 49 is joined to the piston 45 and the bar 37 is joined to the lower end of the inner tube 50.
  • the housing 11 is provided with an inwardly protruding ring 52, and the outer tube 49 is provided w th a shoulder 53 so that the movement of the device 35 is limited between the first position wherein the shoulder 53 is in contact with the inwardly protruding ring 52 and the second position wherein the piston 45 is in contact with the inwardly protruding ring 52.
  • the toothed bar 37 and the spur gear 40 are so designed that in the first position the saw arm 15 is in the direction of the housing 11 and that in the second position the saw arm 15 extends perpendicular to the housing 11.
  • the housing is furthermore provided with an inwardly protruding support ring 55, and the inner tube 50 is provided with an outwardly protruding ring 56.
  • two springs are arranged: a return spring 62 located between the inwardly protruding support ring 55 and the outwardly protruding ring 56, and a compression spring 64 arranged between the outwardly protruding ring 56 and the lower end of the outer tube 49.
  • the two springs 62 and 64 are to provide a slightly floating suspension of the chainsaw arm 15 which allows the chainsaw to respond to hard spots in the casing and/or surrounding cement lining and formation.
  • the motor 27 is fixed to the inner tube 50 by means of supports 67 and 68, and the telescopic output shaft 28 of the motor 27 extends through opening 70 in plate 71.
  • the motor 27 is a hydraulic positive displacement motor of the Moineau type.
  • the motor 27 is arranged co-axially to the longitudinal axis I of the housing 11.
  • the upper support 67 is a ring that prevents fluid for powering the motor 27 from leaking away.
  • the cutting device 10 is lowered into the well 1 (see Figure 1) at the lower end of pipe 21.
  • the saw arm 15 is in the first, co ⁇ axial position relative to the longitudinal axis I.
  • the motor 27 is activated by passing a driving fluid through the pipe 21, this fluid passes via opening 46 into the positive displacement motor 27.
  • the telescopic output shaft 28 of the motor 27 drives the endless chain 24 with the cutting elements 25 via the transmission system 20.
  • the fluid supplied through the pipe 21 also acts on the piston
  • the device 35 for causing the bar 37 to translate moves downwards, and the saw arm 15 will gradually hinge towards to a position away from the longitudinal axis I of the housing 11.
  • the saw arm 15 is rotated the cutting elements 25 cut through the casing 5 (see Figure 1), the cement layer 7 and the underground formation 2.
  • the cutting device 10 is pulled upwards to form the elongated slot 23 in the underground formation 2.
  • the supply of fluid is interrupted, and the return spring 62 forces the device 35 for causing the bar 37 to rotate upwards so that the saw arm 15 returns to its first, co-axial position.
  • the length of the saw arm 15 is not limited by the diameter of the housing or of the borehole, therefore the depth of the slot can be made much greater than the depth that can be made with the known cutting devices which employ a circular cutting blade.
  • the elongated slot of the present invention has flat walls, therefore application of a slot results in a production gain of at least 25% when compared to conventional perforations having the same depth which are created by means of a perforating gun.
  • the elongated slots made in accordance with the method of the present invention also improve any further treatment of the well such as gravel packing, hydraulic fracturing and other stimulation treatments. When slots according to the invention are used in combination with gravel packing substantially higher gains (up to 300%) can be expected due to the absence of a crunched zone with fines that tend to plug the gravel filter perforation tunnels made with conventional perforating techniques.
  • the cutting device can be provided with a conduit system and with nozzles that distribute fluid used to drive the motor to the cutting elements for cleaning them.
  • the fluid pressure near the saw arm can be controlled.
  • the pressure can be larger than the formation pressure to facilitate cutting the formation.
  • the pressure can be less than the formation pressure, and fluid will flow from the formation into the well and this fluid will clean the cutting elements.
  • the motor of the device described with reference to Figure 2 is a hydraulic, positive displacement motor, but instead the motor can be a hydraulic turbine or an electric motor.
  • the cutting device will be attached to the lower end of a pipe such as a drill pipe or a coiled tubing.
  • the motor is an electric motor the cutting device is attached to the lower end of an electric line or a coiled tubing provi' ed internally with an electric line.
  • the cutting device can be provided with a transmission system that transmits rotation of the pipe on which the device is lowered into the well to the endless chain.
  • the bar 37 can be replaced by a rotatable spindle driven by an electric motor, which spindle co-operates with the spur gear.
  • the cutting device according to the present invention can be equipped with more than one saw arm, for example with two symmetrical saw arms.
  • the second saw arm (not shown) may be hingeable about the drive shaft 30 and may be induced to hinge by means of a spur gear which is driven by a toothed bar.
  • Such toothed bar and spur gear may be arranged in a mirror position with respect to the spur gear 40 and toothed bar 37 as shown in Figure 2.
  • the cutting elements cut through the casing, the cement and the formation. It will be understood that when the well is completed with a liner, the cutting elements will cut through the liner, and that when the well is an open hole the cut will only be made in the formation.
  • the device may be equipped with a circular saw blade which first cuts a slot in the casing or liner and the chain saw is then hinged through the thus cut slot to cut a slot in the cement lining and surrounding formation.
  • the well as shown in Figure 1 was a vertical well, however, the application of the cutting device according to the present invention is not restricted to vertical wells.
  • the well can also be an inclined or horizontal well, in which case the term 'upwards' means 'into a direction nearer to the wellhead'.
  • the endless chain can rotate in two directions.
  • the elongated slot can be made travelling upwards (as described with reference to Figure 1) or downwards.
  • the cutting elements 25 are made of wear-resistant material, such as tungsten carbide, or natural or synthetic diamond.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Small-Scale Networks (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

Un dispositif de coupe pour réaliser une saignée adjacente à un puits traversant une formation souterraine comporte un guide (15) de scie à chaîne portant une chaîne sans fin (24) avec des éléments coupants (25). En service, la chaîne (24) tourne autour du guide (15) tandis que ce dernier est graduellement orienté d'une position longitudinale vers une position latérale par rapport au puits de forage, amenant ainsi les éléments coupants (25) à découper une saignée dans la formation (2) et éventuellement le revêtement de puits (5).
PCT/EP1995/003091 1994-08-02 1995-08-01 Dispositif et procede pour realiser une saignee dans une formation souterraine WO1996004457A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DK95929072T DK0774039T3 (da) 1994-08-02 1995-08-01 Anordning og fremgangsmåde til frembringelse af en spalte i en underjordisk formation
NZ291437A NZ291437A (en) 1994-08-02 1995-08-01 Chain saw pivotable outwardly from longitudinal housing to cut adjacent slot in well
BR9508463A BR9508463A (pt) 1994-08-02 1995-08-01 Dispositivo e método para produzir uma fenda em uma formação subterrânea
RU97103211A RU2137912C1 (ru) 1994-08-02 1995-08-01 Устройство для образования выреза в подземном пласте
AU32567/95A AU682280B2 (en) 1994-08-02 1995-08-01 Device and method for making a slot in an underground formation
EP95929072A EP0774039B1 (fr) 1994-08-02 1995-08-01 Dispositif et procede pour realiser une saignee dans une formation souterraine
DE69503251T DE69503251T2 (de) 1994-08-02 1995-08-01 Vorrichtung und verfahren zum einbringen eines schlitzes in eine unterirdische formation
NO19970400A NO312421B1 (no) 1994-08-02 1997-01-30 Anordning for å lage en sliss i en undergrunnsformasjon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP94202239.3 1994-08-02
EP94202239 1994-08-02

Publications (1)

Publication Number Publication Date
WO1996004457A1 true WO1996004457A1 (fr) 1996-02-15

Family

ID=8217086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003091 WO1996004457A1 (fr) 1994-08-02 1995-08-01 Dispositif et procede pour realiser une saignee dans une formation souterraine

Country Status (12)

Country Link
EP (1) EP0774039B1 (fr)
CN (1) CN1052292C (fr)
AU (1) AU682280B2 (fr)
BR (1) BR9508463A (fr)
CO (1) CO4440615A1 (fr)
DE (1) DE69503251T2 (fr)
DK (1) DK0774039T3 (fr)
NO (1) NO312421B1 (fr)
NZ (1) NZ291437A (fr)
OA (1) OA10398A (fr)
RU (1) RU2137912C1 (fr)
WO (1) WO1996004457A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306988A (en) * 1995-11-06 1997-05-14 Red Baron Apparatus for forming a slot in a wellbore
WO2004046499A1 (fr) * 2002-11-15 2004-06-03 Etudes & Productions Schlumberger Procede de formation d'une fenetre dans un tubage
US9371698B2 (en) 2013-11-06 2016-06-21 Bernard Compton Chung Subsurface formation cutter
WO2016186516A1 (fr) * 2015-05-19 2016-11-24 Sintef Tto As Outil de fraisage pourvu de dispositifs de coupe latéraux actifs auto-entraînés
EP3169862A4 (fr) * 2014-07-14 2018-03-21 Aarbakke Innovation A.S. Outil d'intervention de puits de forage pour pénétrer dans des obstructions dans un puits de forage

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101240697B (zh) * 2008-03-13 2010-12-01 上海交通大学 微型井下侧壁环形槽切割工具
RU2464411C2 (ru) * 2010-11-09 2012-10-20 Михаил Павлович Сергиенко Способ вскрытия продуктивных пластов и устройство для его осуществления
GB201100975D0 (en) * 2011-01-20 2011-03-09 Lee Paul B Downhole tools
CN104775813B (zh) * 2015-03-26 2017-06-27 天地科技股份有限公司 一种可开合孔内纵向切槽装置
CN105952380B (zh) * 2016-06-17 2018-06-29 四川众基精锚工程技术有限公司 一种模扩孔设备及其扩孔方法
EA034113B1 (ru) * 2018-01-15 2019-12-27 Общество С Ограниченной Ответственностью "Научная Компания "Луч" Рабочий орган перфорационного устройства
CN108954881B (zh) * 2018-07-27 2020-05-19 贵州省智慧能源股份有限公司 一种深部地热井开缝装置及方法
RU2751046C1 (ru) * 2020-11-18 2021-07-07 Акционерное общество "Азимут" (АО "Азимут") Гидромеханический щелевой перфоратор

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406351A (en) * 1920-09-04 1922-02-14 Clyde S Corrigan Control bracket gear for deep-well-enlarging and cistern-making machines
US2178554A (en) * 1938-01-26 1939-11-07 Clifford P Bowie Well slotter
GB842549A (en) * 1959-03-20 1960-07-27 Ramsey Smith Deep well chain saw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406351A (en) * 1920-09-04 1922-02-14 Clyde S Corrigan Control bracket gear for deep-well-enlarging and cistern-making machines
US2178554A (en) * 1938-01-26 1939-11-07 Clifford P Bowie Well slotter
GB842549A (en) * 1959-03-20 1960-07-27 Ramsey Smith Deep well chain saw

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306988A (en) * 1995-11-06 1997-05-14 Red Baron Apparatus for forming a slot in a wellbore
WO1997017523A1 (fr) * 1995-11-06 1997-05-15 The Red Baron (Oil Tools Rental) Limited Dispositif pour la formation d'une fente dans un puits de forage
GB2306988B (en) * 1995-11-06 1999-07-28 Red Baron Apparatus for forming a slot in a wellbore
US6024166A (en) * 1995-11-06 2000-02-15 The Red Baron (Oil Tools Rental) Limited Apparatus for forming a slot in a wellbore
WO2004046499A1 (fr) * 2002-11-15 2004-06-03 Etudes & Productions Schlumberger Procede de formation d'une fenetre dans un tubage
US7537055B2 (en) 2002-11-15 2009-05-26 Schlumberger Technology Corporation Method and apparatus for forming a window in a casing using a biasing arm
US9371698B2 (en) 2013-11-06 2016-06-21 Bernard Compton Chung Subsurface formation cutter
EP3169862A4 (fr) * 2014-07-14 2018-03-21 Aarbakke Innovation A.S. Outil d'intervention de puits de forage pour pénétrer dans des obstructions dans un puits de forage
US10370920B2 (en) 2014-07-14 2019-08-06 Aarbakke Innovation As Wellbore intervention tool for penetrating obstructions in a wellbore
WO2016186516A1 (fr) * 2015-05-19 2016-11-24 Sintef Tto As Outil de fraisage pourvu de dispositifs de coupe latéraux actifs auto-entraînés

Also Published As

Publication number Publication date
AU682280B2 (en) 1997-09-25
RU2137912C1 (ru) 1999-09-20
DE69503251T2 (de) 1998-11-12
EP0774039B1 (fr) 1998-07-01
CN1052292C (zh) 2000-05-10
NZ291437A (en) 1998-08-26
EP0774039A1 (fr) 1997-05-21
DK0774039T3 (da) 1999-04-12
DE69503251D1 (de) 1998-08-06
CN1154731A (zh) 1997-07-16
CO4440615A1 (es) 1997-05-07
AU3256795A (en) 1996-03-04
NO970400L (no) 1997-01-30
NO970400D0 (no) 1997-01-30
BR9508463A (pt) 1997-12-30
NO312421B1 (no) 2002-05-06
OA10398A (en) 2001-12-04

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