EP1934426A1 - Under-reaming and stabilizing tool for use in a borehole and method for using same - Google Patents
Under-reaming and stabilizing tool for use in a borehole and method for using sameInfo
- Publication number
- EP1934426A1 EP1934426A1 EP05797916A EP05797916A EP1934426A1 EP 1934426 A1 EP1934426 A1 EP 1934426A1 EP 05797916 A EP05797916 A EP 05797916A EP 05797916 A EP05797916 A EP 05797916A EP 1934426 A1 EP1934426 A1 EP 1934426A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive tube
- knife
- wedge
- tubular body
- axial
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 14
- 230000000087 stabilizing effect Effects 0.000 title abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000005755 formation reaction Methods 0.000 description 7
- 239000010802 sludge Substances 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 208000031872 Body Remains Diseases 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
-
- 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
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
Definitions
- the present invention relates to a widening and stabilization tool to be implemented in a borehole, comprising a tubular body, to be mounted between a first section of a drill string and a second section thereof, said tubular body having an axial cavity which is open to the outside by at least one radial guide channel, a knife member arranged radially displaceable in each said radial guide channel, and wedge means which by a displacement axial inside the tubular body, induce a radial movement of each knife element in its guide channel.
- Such tools have long been known (see for example US-A-5,368,114, US-B-6,189,631, US-B-6,615,933 and US-A-2003/0155155).
- the present invention therefore aims to develop a widening and stabilization tool as indicated at the beginning, which allows a great flexibility of use of the tool depending on the geological formations in which it must widen a hole drilling and great ease of replacement of the knife elements after their wear.
- a widening and stabilizing tool which further comprises a drive tube which is mounted inside said axial cavity in such a way able to effect axial displacements, and which has a longitudinal axis, as wedge means, at least one wedge element per knife element which is supported at the periphery of the drive tube, said at least one wedge element and the driving tube being capable of effecting a relative axial sliding movement along the longitudinal axis between them, and stop means which are capable of releasably locking said at least one wedge element on the tube in a locking position in which the drive tube can perform said axial displacements, and said at least one wedge element is driven by the drive tube in these axial displacements.
- This tool therefore makes it easy to replace the corner elements by detaching them from the drive tube on which they are supported. Therefore it is possible without difficulty to replace them with other corner elements having a different configuration.
- knife elements which react more flexibly during the enlargement because they rely on steep corner elements.
- knife elements reacting harder, because the corner elements will then be provided with a lower slope.
- Such a transformation of the tool thus requires only the replacement of the corner elements and the substitution of the knife elements by others adapted to these corner elements. It is thus also possible to provide in the same radial guide channels, knife elements having different active lengths, without having to change tools.
- the phenomenon of wear of the knife elements occurs, they can be rapidly replaced, as will be described in more detail below.
- the drive tube has at its periphery longitudinal grooves in each of which at least one wedge element can perform said relative axial sliding movement, being retained radially inside this longitudinal groove.
- said stop means comprise an abutment closing each longitudinal groove at a first axial end, and a releasable locking member which closes each longitudinal groove at a second axial end, opposite the first, when said at least one wedge member and said drive tube are in said locking position, and which is driven by the during his axial movements.
- said locking element and the drive tube have threads capable of cooperating for their mutual attachment in a closed position of said second end of the longitudinal grooves. In this position, at least a portion of the wedge element is completely stationarily enclosed in its corresponding longitudinal groove closed at both ends.
- each knife element and the inclined outer surface of each wedge element on which the knife element bears is provided with mutual retaining means in the radial direction. which are arranged so that the knife element in the up position in its guide channel makes a radial descent to a low position by retraction from the retaining means of said at least one wedge element during the axial displacement thereof. this.
- the thrust of the knife members radially outwardly and the retraction thereof within the tubular body therefore result solely from a cooperation between wedge elements and a corresponding knife element, trapped in a channel which serves only radial guidance.
- the length of the latter or the extension the tubular body remains the same and the drive tube as well.
- the drive tube comprises a piston which separates, in the tubular body, a first section in which a hydraulic fluid is under an internal pressure and a second section which is in communication with the external by said at least one radial guide channel which are accommodated said at least one corner element and their corresponding knife element.
- the present invention also relates to a method for implementing an enlargement and stabilization tool to be put into service in a borehole.
- the method according to the invention comprises an introduction of each knife element provided with at least one wedge element in a manner engaged in a corresponding radial guide channel of the axial cavity of the tubular body, an introduction of the drive tube in the axial cavity of the tubular body, with relative sliding between said drive tube and said at least one radially engaged wedge member, and releasably locking each wedge member on the drive tube in a position of locking in which the drive tube can perform axial displacements and said at least one wedge member is driven by the drive tube in these axial displacements.
- Such a method allows assembly and disassembly of the tool particularly easy and fast.
- a simple blocking of the wedge elements on the drive tube in an appropriate position immediately allows the tool to be put into service.
- the drive tube can perform only axial sliding movement, without rotation about its axis.
- each knife element further comprises, before the step of introducing each knife element, an arrangement on at least one inclined inner surface of each knife element of at least one wedge element having an external surface inclined in the same way, so that these elements remain integral with each other, during this introduction step, and, after the aforementioned blocking step, knife elements and elements wedges are disengaged so that each knife element can slide on the inclined surface of said at least one corresponding corner element.
- the separation between the corner elements and the knife elements can be done for example by shearing, from a threshold hydraulic pressure, pins which hold the knife elements on their corner elements, that is to say then say that the widening tool has already descended into the borehole.
- Figure 1 shows a partially broken perspective view of a tool drive tube according to the invention which is provided with corner elements and knife elements.
- Figure 2 shows a perspective view of the drive tube.
- Figures 3 to 6 show steps of mounting the tool according to the invention.
- Figure 7 shows the same tool when the knife elements are in use.
- Figures 8 to 10 show an axial sectional view of a tool embodiment according to the invention provided on either side of connecting elements for fixing the tool in the drill string.
- Figures 11 and 12 are cross-sectional views along line X1-X1 of Figure 9 and respectively along the line XII-XII of this figure.
- Figures 13 to 15 each show a partially broken perspective view of an activation device of the tool according to the invention in three different positions.
- Figures 16 and 17 each show a partially broken perspective view of a capture device of the drive tube, in two different positions.
- FIG. 18 represents a view in axial section of an alternative device for activating the tool according to the invention.
- Fig. 19 is an enlarged perspective view of a wedge member embodiment.
- the tool according to the invention comprises a tubular body 1 which is to be mounted between two sections of a drill string not shown.
- This tubular body 1 has an axial cavity 2 which is open towards the outside by three radial guide channels 3, of which only one is visible in this figure.
- guide channels could be provided, as needed.
- each guide channel is arranged radially displaceable a knife element 5 and 6, respectively.
- Each knife element includes, as illustrated in detail on the 1, an outer surface provided with cutting inserts having a front portion 7 inclined forwards (i.e., downwardly in FIG. 1) with respect to the longitudinal axis 8, a central portion 9 substantially parallel to the axis 8 and a rear portion 10 inclined rearwardly with respect to the axis 8.
- the front portion 7 is intended to produce an enlargement of the borehole during its descent, the central portion 9 stabilizing the tool relative to the enlarged hole and the rear portion 10 to produce an enlargement of the borehole during a recovery of the drill string.
- the tool according to the invention also comprises a drive tube 11 which is mounted inside the axial cavity 2 so as to be able to perform axial displacements according to a hydraulic pressure.
- the drive tube 11 presents him. also an axial cavity 12 through which can flow the drilling muds.
- the driving tube 11 comprises a piston 13 which separates, in the tubular body, a first section 14 (see FIG. 8) and a second section 15 (see FIG. 9).
- the first section 14 can penetrate a fluid hydraulically under pressure, for example from the axial cavity 12 of the drive tube passing through filtration means formed by the holes 16.
- the second section 15 of the tubular body 1 is in communication with the outside by the guide channels 3 where are housed the knife elements 5 and 6.
- the tool according to the invention further comprises, in the example shown, two corner elements 17 and 18 per knife element these wedge members being supported by the drive tube 11. It can be understood that only one wedge element per knife element or more than two could be provided, as required.
- FIG. 19 shows a variant embodiment wherein two corner members are rigidly connected to each other.
- Each knife element has at least one internal surface inclined with respect to the longitudinal axis 8. In the exemplary embodiment shown there are two 19 and 20. Each corner element has an outer surface 21 inclined in the same way that is resting on the inner surface 19 or 20 of the corresponding knife element.
- each knife element 5 has a U-shaped cross-section and thus overlaps the corresponding wedge element 17 or 18.
- the surfaces 19 or 20 and 21 of these elements, which are supported on one another, have mutual retaining means in the radial direction which, in the example illustrated, are in the form of a groove in dovetail and a groove 38, of corresponding shape.
- the wedge members are attached to the knife members by shear pins 22 which retain the wedge members with respect to the knife members in the position illustrated in Figs. 3 to 6. To do this these pins are introduced into a perforation 37 provided for this purpose in the knife element and a corresponding perforation of the wedge element (see FIG. 11). .
- the driving tube 11 is provided at its periphery with longitudinal grooves 23 in which the wedge members 17 and 18 can effect a relative axial sliding movement with respect to the driving tube 11, as shown in FIGS. 5 and 6.
- the grooves are limited laterally by lips 24 directed toward each other which narrow the opening of the grooves outwards. In a central position of the grooves, these lips are removed by forming a flare 25 which allows radial penetration of at least a portion of the corresponding corner member.
- corner elements present in this embodiment a conformation with lateral projections that can be slid below the lips 24 aforesaid.
- the tool according to the invention further comprises stop means which are capable of releasably locking the wedge members 17, 18 on the drive tube 11, allowing the axial displacements thereof.
- the stop means comprise a stop 26 which longitudinally limits each longitudinal groove 23. In the example illustrated, it is a wall which terminates the groove on the piston side.
- the stop means also includes a threaded sleeve 27 which can be screwed onto the threaded end 28 of the drive tube. After screwing the threaded sleeve 27 closes the longitudinal grooves 23 on the opposite side to the piston.
- the piston 13 has a passage in the form of at least one small diameter duct 36 (see FIG. 9) which allows communication between the pressure section 14 (see FIG. 8) of the tubular body and the section 15 (see Figure 9) which is in communication with the outside.
- the constriction achieved by this duct 36 has the effect of injecting high pressure hydraulic fluid jets in the section 15. This makes it possible to prevent penetration into the tool of the drilling mud which circulates outside the train. of stems and cleaning the corner elements, knife elements and radial guide channels.
- each wedge member is fixed to its knife element by a shear pin 22 which passes through each wedge member and minus an orifice 37 provided in the knife element (see FIG. 11). In this way, the corner elements and the knife element remain integral during the assembly operations.
- the knife element 5 provided with its two corner elements is then introduced axially or, as illustrated in FIG. 3, radially obliquely inside the cavity 2 of the tubular body 1 in the direction of the arrow F1.
- the knife element 5 is opposite the corresponding radial guide channel 3, it is pulled radially outwards in the direction of the arrow F2 (see Figure 4) and this manually or using of a machine, and it is kept in this engaged position.
- the threaded sleeve 27, provided with a seal 29 in which it is capable of sliding, is introduced by the down in the axial cavity 2.
- the seal is held in position between the threaded end of the sleeve 27 and a return spring not shown.
- the drive tube 11 is introduced in the direction of the arrow F3 into the axial cavity 2 of the tubular body 1.
- the wedge members 18 When flaring of the longitudinal grooves 23 of the drive tube 11 face the corner members 17 (see Fig. 4), the wedge members 18 are located opposite the threaded end 28 of the drive tube.
- the knife elements are then, as illustrated in Figure 5, driven in the direction of the arrow F4 in their guide channel.
- the corner elements 1.7 penetrate radially into the longitudinal grooves, through the flares 25, and the corner members 18 have their lateral projections in position to be able to pass below the lips 24 of the longitudinal grooves 23.
- Figure 6 illustrates a relative sliding between the drive tube 11 and the wedge members 17 and 18.
- the drive tube partially sinks into the threaded sleeve 27.
- the wedge members 17 penetrate the upper part of the grooves longitudinals which are devoid of flaring and corner elements 18 penetrate the lower part of these grooves.
- the threaded sleeve 27 is then screwed down.
- the wedge elements 17, 18 are trapped in the longitudinal grooves 23 between the stops 26 and the threaded sleeve 27, and they are immobilized radially by the lips 24.
- Figure 7 illustrates an axial downward movement of the drive tube 11.
- the knife members 5, 6 have slid on the slope of the wedge members 17, 18 into the expanded position illustrated.
- the assembly and of course the disassembly of the tool are very simple and fast.
- the knife elements can easily be replaced by new ones and other knife models can be introduced into the tool without having to replace the tool itself.
- the tool according to the invention also comprises an activation device which is capable of axially holding the drive tube 11 in its initial position shown in FIGS. 8, 9 and 10. It is in this position of removal of the elements of knife that the tool descended into the borehole.
- this activating device comprises a shear pin 39 which passes through an orifice 40 provided in the tubular body while penetrating into a blind hole provided on an extension tube 41 applied against the sleeve.
- the pin prevents axial displacement of the extension tube 41.
- this threshold is exceeded, the pin 39 is sheared, and the driving tube can slide in the tubular body 1.
- the tool according to the invention is also provided, in the illustrated example, with a return spring 42 which is supported on the one hand on the extension tube 41 and on the other hand on a connecting member 43, fixed on the tubular body 1 and for inserting it into the drill string.
- the return spring 42 When, under the action of pressure, the drive tube 11 is displaced, the return spring is compressed.
- the driving tube 11 is returned to its initial position shown in FIGS. 8 to 10.
- the activation device comprises, at the end of the extension tube 41, a sleeve 44 which surrounds this end.
- the extension tube is provided at its lower end with a plurality of lateral holes 45.
- the sleeve 44 is slidably provided within a sleeve 46 which is fixedly incorporated in the connecting member 43.
- a pin shear 47 holds the sleeve 44 in place over the end of the extension tube 41, in the initial position of the drive tube and the sleeve 44 prevents axial displacement of the extension tube 41 and therefore of the drive tube 11.
- the drilling muds pass through the drive tube 11, the threaded sleeve 27, the extension tube 41 and the sleeve 46 and then join the drill string.
- An electrical control known per se is for example located on the surface and, as illustrated in Figure 18, connected to the latch 70 via an electronic device 71, which can be controlled by pulsations of fluid.
- the electronic device can then in turn control a movement of the latch by a latch activator 72, and this in an open position in which it releases the drive tube.
- the tool according to the invention can also advantageously be provided with a capture device of the drive tube.
- the drive tube 11 is provided with a tubular extension 51 fixed on it.
- This elongate 51 is surrounded by a sleeve 52 capable of sliding over said elongate 51 and inside two successive bushes 53 and 54 interconnected in a fixed manner.
- These bushings 53 and 54 are themselves stationarily embedded within a junction member 57 fixedly connected to the tubular body 1 to allow its insertion into a string of rods.
- a first elastic clamping collar 55 is housed in an internal groove 58 of the sleeve 52 and can therefore slide with it on the elongate member 51.
- a second elastic clamping collar 59 is housed in an internal groove 60 formed between the two bushes 53 and 54, so as to slide on the sleeve 52.
- the sleeve 52 In the initial position of the driving tube 11 and during the putting into service of the tool the sleeve 52 is held axially inside the fixed bushing 53 by a shear pin 61. The sludge passes inside. the sleeve 52, then the elongate 51 and finally the drive tube 11.
- a second ball 62 of diameter greater than that of the sleeve 52 is sent into the drill string. It comes to apply to the inlet of the sleeve 52 by plugging the passage. By the mechanical shock of the ball and the immediate and strong increase in pressure, the pin 61 is sheared and the sleeve 52 can slide downstream.
- a peripheral groove 64 of the sleeve 52 is placed in front of the second elastic clamping collar 59 and the latter is housed therein, thereby securing the sleeve
- the first elastic clamping collar 55 is housed in a peripheral groove 63 provided between the elongate 51 and the drive tube 11, which is raised to its initial position, which secures them with the sleeve 52.
- the drive tube is captured by the tubular body 1 and can not move.
- the sludge can, in this capture position, continue to circulate by passing laterally around the ball 62 in a space 67 formed between the sleeve 53 and the sleeve 52, then in the lateral holes 66 and finally in the sleeve
- the driving piston is driven in its axial displacements by totally or partially mechanical means located for example above the tool.
- the tool comprises a latch which, in a closed position, axially holds the locking device capture in an unactivated position and an electrical controller connected to the latch and capable of controlling a movement of the latch in an open position in which the capture device is moved to its capture position.
- an electrical controller connected to the latch and capable of controlling a movement of the latch in an open position in which the capture device is moved to its capture position.
- This embodiment offers the advantage of excellent resistance to tilting of the corner elements in the grooves and thus to avoid any inadvertent jamming of the corner elements.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BE2005/000145 WO2007041811A1 (en) | 2005-10-11 | 2005-10-11 | Under-reaming and stabilizing tool for use in a borehole and method for using same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1934426A1 true EP1934426A1 (en) | 2008-06-25 |
EP1934426B1 EP1934426B1 (en) | 2009-03-04 |
Family
ID=36428027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05797916A Expired - Fee Related EP1934426B1 (en) | 2005-10-11 | 2005-10-11 | Under-reaming and stabilizing tool for use in a borehole and method for using same |
Country Status (5)
Country | Link |
---|---|
US (2) | US7654342B2 (en) |
EP (1) | EP1934426B1 (en) |
CA (1) | CA2624697C (en) |
NO (1) | NO20082043L (en) |
WO (1) | WO2007041811A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8352400B2 (en) | 1991-12-23 | 2013-01-08 | Hoffberg Steven M | Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore |
US7904187B2 (en) | 1999-02-01 | 2011-03-08 | Hoffberg Steven M | Internet appliance system and method |
US20110096174A1 (en) * | 2006-02-28 | 2011-04-28 | King Martin T | Accessing resources based on capturing information from a rendered document |
GB2465504C (en) | 2008-06-27 | 2019-12-25 | Rasheed Wajid | Expansion and sensing tool |
US8776912B2 (en) * | 2009-05-01 | 2014-07-15 | Smith International, Inc. | Secondary cutting structure |
CN102654024B (en) * | 2012-03-13 | 2014-10-01 | 中国海洋石油总公司 | Hydraulic chambering device for drilling |
US8807246B2 (en) | 2012-10-22 | 2014-08-19 | Halliburton Energy Services, Inc. | Downhole tool and control module |
US9534461B2 (en) | 2013-03-15 | 2017-01-03 | Weatherford Technology Holdings, Llc | Controller for downhole tool |
US10590724B2 (en) * | 2013-10-28 | 2020-03-17 | Wellbore Integrity Solutions Llc | Mill with adjustable gauge diameter |
GB2520998B (en) | 2013-12-06 | 2016-06-29 | Schlumberger Holdings | Expandable Reamer |
GB2528457B (en) | 2014-07-21 | 2018-10-10 | Schlumberger Holdings | Reamer |
WO2016014283A1 (en) | 2014-07-21 | 2016-01-28 | Schlumberger Canada Limited | Reamer |
GB2528454A (en) | 2014-07-21 | 2016-01-27 | Schlumberger Holdings | Reamer |
GB2528459B (en) | 2014-07-21 | 2018-10-31 | Schlumberger Holdings | Reamer |
GB2528458A (en) | 2014-07-21 | 2016-01-27 | Schlumberger Holdings | Reamer |
GB2528456A (en) | 2014-07-21 | 2016-01-27 | Schlumberger Holdings | Reamer |
CA3008735A1 (en) | 2017-06-19 | 2018-12-19 | Nuwave Industries Inc. | Waterjet cutting tool |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1804850A (en) * | 1926-10-18 | 1931-05-12 | Grant John | Underreamer with an hydraulic trigger |
US3224507A (en) * | 1962-09-07 | 1965-12-21 | Servco Co | Expansible subsurface well bore apparatus |
US5010967A (en) * | 1989-05-09 | 1991-04-30 | Smith International, Inc. | Milling apparatus with replaceable blades |
NO178938C (en) * | 1992-04-30 | 1996-07-03 | Geir Tandberg | Borehole expansion device |
US6213226B1 (en) * | 1997-12-04 | 2001-04-10 | Halliburton Energy Services, Inc. | Directional drilling assembly and method |
GB9825425D0 (en) * | 1998-11-19 | 1999-01-13 | Andergauge Ltd | Downhole tool |
GB0309906D0 (en) * | 2003-04-30 | 2003-06-04 | Andergauge Ltd | Downhole tool |
US7658241B2 (en) | 2004-04-21 | 2010-02-09 | Security Dbs Nv/Sa | Underreaming and stabilizing tool and method for its use |
GB2421744A (en) * | 2005-01-04 | 2006-07-05 | Cutting & Wear Resistant Dev | Under-reamer or stabiliser with hollow, extendable arms and inclined ribs |
-
2005
- 2005-10-11 CA CA2624697A patent/CA2624697C/en not_active Expired - Fee Related
- 2005-10-11 WO PCT/BE2005/000145 patent/WO2007041811A1/en active Application Filing
- 2005-10-11 EP EP05797916A patent/EP1934426B1/en not_active Expired - Fee Related
-
2008
- 2008-04-10 US US12/100,797 patent/US7654342B2/en not_active Expired - Fee Related
- 2008-04-29 NO NO20082043A patent/NO20082043L/en not_active Application Discontinuation
-
2009
- 2009-12-23 US US12/645,865 patent/US7958951B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2007041811A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7958951B2 (en) | 2011-06-14 |
WO2007041811A1 (en) | 2007-04-19 |
US20080251295A1 (en) | 2008-10-16 |
US7654342B2 (en) | 2010-02-02 |
CA2624697A1 (en) | 2007-04-19 |
US20100096191A1 (en) | 2010-04-22 |
NO20082043L (en) | 2008-07-11 |
EP1934426B1 (en) | 2009-03-04 |
CA2624697C (en) | 2012-12-04 |
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Legal Events
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