WO1993025794A1 - Outils de forage - Google Patents

Outils de forage Download PDF

Info

Publication number
WO1993025794A1
WO1993025794A1 PCT/GB1993/001203 GB9301203W WO9325794A1 WO 1993025794 A1 WO1993025794 A1 WO 1993025794A1 GB 9301203 W GB9301203 W GB 9301203W WO 9325794 A1 WO9325794 A1 WO 9325794A1
Authority
WO
WIPO (PCT)
Prior art keywords
stabiliser
reaming
passage
sleeve
flow
Prior art date
Application number
PCT/GB1993/001203
Other languages
English (en)
Inventor
Neil A. A. Simpson
Original Assignee
Panther Oil Tools (Uk) 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 Panther Oil Tools (Uk) Limited filed Critical Panther Oil Tools (Uk) Limited
Priority to AU43424/93A priority Critical patent/AU4342493A/en
Publication of WO1993025794A1 publication Critical patent/WO1993025794A1/fr

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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
    • 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
    • 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
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • E21B34/102—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for locking the closing element in open or closed position
    • E21B34/103—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for locking the closing element in open or closed position with a shear pin
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools

Definitions

  • This invention relates to well-drilling tools, and relates more particularly but not exclusively to a well-drilling tool in the form of a back-reaming stabiliser incorporating back-reaming cutter means and valve means controllably operable to divert well-drilling fluid to said cutter means.
  • the back-reaming stabiliser is particularly but not exclusively applicable to the drilling of wells where the drilled formation may swell or slough into the wellbore and thereby restrict egress of the drillstring.
  • the drilling of wells, particularly oil wells, through geological formations which are under extreme local pressures has inherent problems due to the wellbore becoming restricted by these rocks swelling or sloughing into it.
  • the formation will exhibit a plastic flow and may restrict the wellbore diameter over many metres.
  • the stabiliser is usually seriously damaged as a consequence.
  • a stabiliser which is specifically designed to have an additional back-reaming function by the provision of suitably located cutters will usually require that the cutters be supplied with mud or other appropriate well-drilling fluid for the purposes of cooling, lubrication, and debris removal.
  • the mud will be supplied to the cutters by way of nozzles in the stabiliser.
  • the same mud or other well-drilling fluid will be similarly supplied to the drillbit normally present at the downhole (bottom) end of the BHA.
  • the drillbit and the back-reaming cutters will be required to work at mutually different times, according to whether the intended direction of progress of the drillstring is downhole or uphole.
  • the simultaneous supply of mud to the drillbit and to the back-reaming cutters represents an inefficient use of the mud supply, the inefficiency manifesting itself, for example, as an unnecessarily high power consumption by the mud pump.
  • the back-reaming cutters must be reliably supplied with mud or other appropriate well-drilling fluid during back-reaming operation.
  • a back-reaming stabiliser comprising a tubular body from which a plurality of stabiliser blades extend, said tubular body having a through passage for hydraulic fluid to flow internally through said tubular body between opposite ends of said stabiliser in use thereof, said stabiliser blades extending radially outwards of said tubular body, said stabiliser blades extending longitudinally at least partially along said tubular body, said stabiliser blades extending circumferentially at least partially around said tubular body, radially outer edges of said stabiliser blades being formed as wellbore-bearing surfaces to provide a radially supportive function in use of said stabiliser, longitudinally common end edges of said stabiliser blades being formed as back-reaming cutter means, and fluid vent means coupling said through passage to the exterior of said stabiliser for the flow therethrough of hydraulic fluid from said through passage to said cutter means, said back-reaming stabiliser being characterised by further comprising valve means normally closing said fluid vent means to the flow of hydraulic fluid therethrough, said valve means being selective
  • Said valve means may comprise a sleeve means movable in said through passage between a first position of said sleeve means in which said sleeve means closes said fluid vent to the passage of hydraulic fluid therethrough, and a second position of said sleeve means in which said sleeve means opens said fluid vent means to the passage of hydraulic fluid therethrough, said sleeve means being movable from said first position thereof to said second position thereof by the application of a substantial pressure differential between longitudinally opposite ends thereof.
  • Said sleeve means is preferably normally retained in said first position thereof by shear means rupturable by said application of said substantial pressure differential between longitudinally opposite ends of said sleeve means thereupon to release said sleeve means from said first position thereof for movement to said second position thereof. Movement of said sleeve means from said first position thereof to said second position thereof may be by way of sliding movement longitudinally along said through passage.
  • Said sleeve means may be formed with an internal passage extending longitudinally therethrough and locally defining said through passage of said stabiliser, said substantial pressure differential being created by causing an at least temporary blockage of flow of hydraulic fluid through said internal passage extending longitudinally through said sleeve means.
  • Such hydraulic flow blockage may be caused by manoeuvring a flow-blockage-inducing means into said internal passage through said sleeve means.
  • Said flow-blockage-inducing means may comprise a drop means introduced to said stabiliser by being dropped into the bore of the drillstring of which the stabiliser forms part.
  • Said drop means preferably comprises a generally tubular member having a longitudinal through bore initially blocked to the passage of hydraulic fluid therethrough by a rupturable diaphragm extending thereacross, said tubular member being formed to lodge in said sleeve means, preferably by forming said tubular member with an external shoulder dimensioned to engage positively with said sleeve means which may be formed with an internal shoulder for that purpose.
  • Said longitudinally common end edges of said stabiliser may be formed as said back-reaming cutter means by embedding a plurality of hard inserts in leading portions of said edges, preferably so as to lie substantially in a common notional surface of revolution, which surface may be conical.
  • Each said hard insert may be a PDC (polycrystalline diamond compact) , or a chip of tungsten carbide.
  • Said fluid vent means may comprise a respective fluid nozzle adjacent each said cutter-formed end edge of said stabiliser blades.
  • Fig 1 is an elevation of an embodiment of back-reaming stabiliser in accordance with the invention.
  • Fig 2 is a plan view of the stabiliser of Fig 1;
  • Fig 3 is a longitudinal section of the stabiliser of Fig 1, taken on the line III-III in Fig 2;
  • Fig 4 is a transverse section of the stabiliser of Fig 1, taken on the line IV-IV in Fig 3;
  • Fig 5 is a longitudinal section, to a much-enlarged scale, of a drop member for use with the stabiliser of Fig 1.
  • a back-reaming stabiliser 10 in accordance with the present invention is basically formed as a conventional fixed-blade stabiliser, though with certain modifications and additions (detailed subsequently) to meet the object of the invention.
  • the stabiliser 10 comprises an elongate tubular body 12 having a standard API (American Petroleum Institute) box connector 14 at it upper end, and a standard API pin connector 16 at its lower end.
  • the connectors 14 and 16 enable the stabiliser 10 to be coupled into a BHA (bottom hole assembly; not shown) , the BHA being connected to the downhole end of a drillstring (not shown) .
  • the tubular body 12 has a through passage 18 for carrying a flow of mud (well-drilling fluid) or other hydraulic fluid between the connectors 14 and 16 in use of the stabiliser 10.
  • the body 12 is integrally formed with three stabiliser blades 20, 22 and 24 each extending radially outwards of the body 12 along a central part of its length.
  • the blades 20-24 are equi-angularly located around the body 12 (see Figs 2 and 4) , and are spirally shaped (see Fig 1) such that, as a whole, the blades 20-24 extend circumferentially around the body 12 to define the outer periphery of the stabiliser 10 (see Fig 2) .
  • the respective radially outer edges 26, 28 and 30 of the stabiliser blades 20, 22 and 24 are formed as wellbore-bearing surfaces such that the stabiliser 10 provides the conventional radially supportive function in operation as part of a BHA.
  • the respective upper ends 32, 34 and 36 of the stabiliser blades 20, 22 and 24 are formed as back-reaming cutters by being each inset with a respective row of PDCs 38, 40 and 42 which collectively sit on a notional cone coaxial with the stabiliser 10 and converging upwardly.
  • the body 12 is fitted with three radially directed nozzles 44, 46 and 38 between each of the cutter sets 38-42 (see Figs 2, 3 and 4).
  • the nozzles 44-48 are each fed from the central through passage 18 during back-reaming, but during normal downwardly directed drilling, the nozzles 44-48 are closed off by a sleeve 50 (Figs 3 and 4) which is a sliding fit in the bore of the through passage 18.
  • the sleeve 50 is held in a position in which it normally blocks fluid flow to the nozzles 44-48 by being secured to the lower end of a tubular mounting 52 having an external shoulder 54 which sits on a matching shoulder 56 in the bore of the through passage 18.
  • the sleeve 50 is secured to the mounting 52 by means of shear pins 58 (Fig 3; only one pin being visible) .
  • the stabiliser 10 When the stabiliser 10 is required to operate as a back-reamer, it is necessary to initiate flow of well-drilling fluid outwards through the nozzles 44, 46 and 48 for the reasons previously discussed. Consequently, it is necessary to slide the sleeve 50 down the bore of the through passage to a position in which the sleeve 50 no longer blocks fluid outflow through the nozzle 44-48. Since the stabiliser 10 will at that time be part of a BHA deep down a well, remote operation of the sleeve 50 is clearly necessary (ie direct manual movement of the sleeve 50 in such circumstances is utterly impossible) . A drop member 60 for achieving such remote movement of the sleeve 50 will now be detailed with reference to Fig 5 (wherein the drop member 60 is depicted to a much larger scale than the stabiliser 10 is shown in Figs 1-4) .
  • the drop member 60 is generally tubular in shape and has an external diameter sufficiently small as to allow the member 60 to drop down the bore of the drillstring, and to enter the bore of the sleeve mounting 52 (Fig 3) .
  • the upper end of the drop member 60 is formed with a small external shoulder 62 dimensioned to seat on an internal shoulder 64 at the lower end of the sleeve 50 (Fig 3) .
  • the external diameter of the drop member 60 below the shoulder 62 is marginally less than the internal diameter of the sleeve shoulder 64 so as to allow the drop member 60 to pass down through the sleeve 50 until the shoulder 62 seats on the sleeve shoulder 64, whereupon all further downward movement of the drop member 60 is halted.
  • the drop member 60 is formed of an upper component 66 and a lower component 68 which are normally mutually secured by means of a screw thread 70, a tight threaded connection of the components 66 and 68 conveniently being achieved by the application of spanners (not shown) to external flats 72 and 74.
  • the components 66 and 68 have respective longitudinal through bores 76 and 78 which are initially sealed off one from the other by means of a burstable diaphragm 80 clamped between the components 66 and 68 to extend fully across the bores 76 and 78.
  • the stabiliser 10 provides the conventional radially supportive function of the conventional fixed-blade stabiliser which it resembles, and which need not be further detailed.
  • normal rotation of the stabiliser 10 is continued (clockwise as viewed from above, ie clockwise as viewed in Figs 2 and 4) , but a suitable upforce is applied to the drillstring and through it, the upforce is applied to the BHA of which the stabiliser 10 is a part.
  • This causes the cutter sets 42, 44 and 46 to bite into the wellbore intrusion.
  • the nozzles 44, 46 and 48 have to be opened prior to commencement of back-reaming.
  • the drop member 60 is released into the bore of the drillstring to drop down or be forced by pumped mud to the stabiliser 10 wherein it passes down the through bores of the sleeve mounting 52 and of the sleeve 50, until the external drop member shoulder 62 lodges on the internal sleeve shoulder 64 to halt the downward movement of the drop member 60. In this position, the drop member 60, together with the diaphragm 80, restrict or block the flow of mud down the drillstring.
  • the shear pins 58 will rupture and thereby allow the sleeve 50 to be moved downwards from its initial nozzle-blocking position as shown in Fig 3, to a lower position in which the nozzles 44, 46, and 48 are opened for outflow of mud therethrough as previously detailed.
  • the pressure of the mud on the diaphragm 80 is increased (notwithstanding the now-commenced mud outflow through the nozzles 44-46) , eg by increasing the working speed of the mud pumps (not shown) , to a level at which the diaphragm 80 bursts, thereby re-establishing mud flow down through the stabiliser 10 to the drillbit.
  • the collective rupturing force of the shear pins 58 at any given mud pressure will be selected to be less than the equivalent rupturing force of the diaphragm 80 at the same mud pressure, ie it will be arranged that the shear pins 58 will always rupture before the diaphragm 80 ruptures to ensure the intended sequence of operations.
  • Mud flow down the drillstring is now split between the stabiliser nozzles 44-48 and the drillbit nozzles (not shown) in proportion to their relative flow areas, with the greater portion of mudflow preferably going through the drillbit to establish a substantial upflow of mud past the exterior of the stabiliser 10 for removal of debris arising from back-reaming operation of the cutters 38-42.
  • the lesser portion of mudflow goes through the nozzles 44-48 to provide the cooling, lubrication, and cleaning functions previously detailed.
  • the through bore of the stabiliser is such that fishing and survey equipment may pass through it without impinging on the valve operating mechanism or snagging on any shoulders or ledges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (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)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

Stabilisateur de rétro-alésage (10) destiné à être introduit dans un ensemble de fond de puits de sondage situé à l'extrémité inférieure d'une colonne de forage. Le stabilisateur est du type classique à lames fixes auquel on a ajouté des rangées d'éléments compacts (38, 40, 42) à diamant polycristallin ou d'autres éléments rapportés (20, 22, 24) résistants et appropriés placés le long des bords supérieurs des lames (20, 22, 24) pour servir de couteaux de rétro-alésage; des ajutages (44, 46, 48) qui servent à envoyer les boues vers ces couteaux pendant le rétro-alésage; et une soupape (50) qui ferme normalement ces ajutages. L'ouverture de la soupape s'effectue par télécommande juste avant le début du rétro-alésage. De préférence, la soupape se présente sous forme d'une gaine (50) qui est normalement maintenue sur les ajutages par des goupilles de cisaillement (58) qui sont brisées par un élément plongeur (60) de floculation de l'écoulement. L'élément plongeur comprte de préférence un trou traversant (76, 78) qui est initialement bouché par un diaphgrame (80) pouvant éclater, de sorte qu'après l'ouverture de la gaine (50) par l'élément plongeur, la pression des boues peut augmenter pour faire exploser le diaphragme (80) et rouvrir un passage pour les boues vers l'extrémité de l'ensemble de fond de puits. Ceci a pour effet de séparer les boues en un courant ascendant qui sort à l'extérieur du stabilisateur et en jets de boues qui traversent les ajutages et se dirigent vers les couteaux de rétro-alésage. Cette invention permet d'éviter le gaspillage de boues qui se produirait si les ajutages des couteaux de rétro-alésage restaient ouverts en permanence.
PCT/GB1993/001203 1992-06-05 1993-06-07 Outils de forage WO1993025794A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43424/93A AU4342493A (en) 1992-06-05 1993-06-07 Well drilling tools

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9211946.0 1992-06-05
GB929211946A GB9211946D0 (en) 1992-06-05 1992-06-05 Backreaming stabilizer

Publications (1)

Publication Number Publication Date
WO1993025794A1 true WO1993025794A1 (fr) 1993-12-23

Family

ID=10716612

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/001203 WO1993025794A1 (fr) 1992-06-05 1993-06-07 Outils de forage

Country Status (3)

Country Link
AU (1) AU4342493A (fr)
GB (1) GB9211946D0 (fr)
WO (1) WO1993025794A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004458A1 (fr) * 1994-08-01 1996-02-15 Arthur Deacey Stewart Outil deflecteur de boue de forage resistant a l'erosion
WO1996028635A1 (fr) * 1995-03-11 1996-09-19 Enterprise Oil Plc Sabot de cuvelage perfectionne
WO1997035092A1 (fr) * 1996-03-19 1997-09-25 Ingersoll-Rand Company Element de guidage amovible servant a guider des elements de garniture de forage dans un trou de sondage
EP1085167A3 (fr) * 1999-09-09 2001-06-27 Smith International, Inc. Aléseur avec éléments de coupe en diamant polycristallin
EP1811124A1 (fr) * 2006-01-18 2007-07-25 Omni Oil Technologies Outil pour élargir des trous de forage
US7571769B2 (en) 2007-02-23 2009-08-11 Baker Hughes Incorporated Casing window milling assembly
WO2010056373A1 (fr) * 2008-11-17 2010-05-20 Omni Ip Ltd. Stabilisateur de forage ultra dur
US7900703B2 (en) 2006-05-15 2011-03-08 Baker Hughes Incorporated Method of drilling out a reaming tool
US7954571B2 (en) 2007-10-02 2011-06-07 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
US8006785B2 (en) 2004-02-19 2011-08-30 Baker Hughes Incorporated Casing and liner drilling bits and reamers
US8191654B2 (en) 2004-02-19 2012-06-05 Baker Hughes Incorporated Methods of drilling using differing types of cutting elements
US8245797B2 (en) 2007-10-02 2012-08-21 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
CN104141464A (zh) * 2014-07-28 2014-11-12 东北石油大学 水平井用井眼清洁工具
WO2015079003A3 (fr) * 2013-11-29 2015-07-23 Welltec A/S Colonne de tubage de production de fond

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237705A (en) * 1963-11-13 1966-03-01 Williams Joseph W Reamer for enlarging and straightening bore holes
US3331378A (en) * 1964-04-29 1967-07-18 Joe W Gibbs Relief device for tubing pressure
US3908771A (en) * 1974-03-01 1975-09-30 Wylie P Garrett Drill collar incorporating device for jetting drilling fluid transversely into bore hole
US3981360A (en) * 1975-07-30 1976-09-21 Cook Testing Co. Well tubing drain
US4039031A (en) * 1976-01-26 1977-08-02 Baker Oil Tools, Inc. Well control valve apparatus
US4406335A (en) * 1980-10-30 1983-09-27 Nick Koot Special circulation sub
EP0176180A1 (fr) * 1984-07-27 1986-04-02 DIAMANT BOART Société Anonyme Outil pour élargir des trous de forage
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
US4618010A (en) * 1986-02-18 1986-10-21 Team Engineering And Manufacturing, Inc. Hole opener
US4630694A (en) * 1985-10-16 1986-12-23 Walton Paul G Integral blade hole opener
US4658902A (en) * 1985-07-08 1987-04-21 Halliburton Company Surging fluids downhole in an earth borehole
US4733723A (en) * 1986-07-18 1988-03-29 Callegari Sr Stephen R Gravel pack assembly

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237705A (en) * 1963-11-13 1966-03-01 Williams Joseph W Reamer for enlarging and straightening bore holes
US3331378A (en) * 1964-04-29 1967-07-18 Joe W Gibbs Relief device for tubing pressure
US3908771A (en) * 1974-03-01 1975-09-30 Wylie P Garrett Drill collar incorporating device for jetting drilling fluid transversely into bore hole
US3981360A (en) * 1975-07-30 1976-09-21 Cook Testing Co. Well tubing drain
US4039031A (en) * 1976-01-26 1977-08-02 Baker Oil Tools, Inc. Well control valve apparatus
US4406335A (en) * 1980-10-30 1983-09-27 Nick Koot Special circulation sub
EP0176180A1 (fr) * 1984-07-27 1986-04-02 DIAMANT BOART Société Anonyme Outil pour élargir des trous de forage
US4583603A (en) * 1984-08-08 1986-04-22 Compagnie Francaise Des Petroles Drill pipe joint
US4658902A (en) * 1985-07-08 1987-04-21 Halliburton Company Surging fluids downhole in an earth borehole
US4630694A (en) * 1985-10-16 1986-12-23 Walton Paul G Integral blade hole opener
US4618010A (en) * 1986-02-18 1986-10-21 Team Engineering And Manufacturing, Inc. Hole opener
US4733723A (en) * 1986-07-18 1988-03-29 Callegari Sr Stephen R Gravel pack assembly

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU701725B2 (en) * 1994-08-01 1999-02-04 Stable Services Limited Erosion resistant downhole mud diverter tool
US5911285A (en) * 1994-08-01 1999-06-15 Stewart; Arthur Deacey Erosion resistant downhole mud diverter tool
WO1996004458A1 (fr) * 1994-08-01 1996-02-15 Arthur Deacey Stewart Outil deflecteur de boue de forage resistant a l'erosion
WO1996028635A1 (fr) * 1995-03-11 1996-09-19 Enterprise Oil Plc Sabot de cuvelage perfectionne
US6062326A (en) * 1995-03-11 2000-05-16 Enterprise Oil Plc Casing shoe with cutting means
WO1997035092A1 (fr) * 1996-03-19 1997-09-25 Ingersoll-Rand Company Element de guidage amovible servant a guider des elements de garniture de forage dans un trou de sondage
US7293617B2 (en) * 1999-09-09 2007-11-13 Smith International, Inc. Polycrystaline diamond compact insert reaming tool
EP1085167A3 (fr) * 1999-09-09 2001-06-27 Smith International, Inc. Aléseur avec éléments de coupe en diamant polycristallin
US6386302B1 (en) 1999-09-09 2002-05-14 Smith International, Inc. Polycrystaline diamond compact insert reaming tool
US6609580B2 (en) * 1999-09-09 2003-08-26 Smith International, Inc. Polycrystalline diamond compact insert reaming tool
US7137463B2 (en) * 1999-09-09 2006-11-21 Smith International, Inc. Polycrystaline diamond compact insert reaming tool
US8205693B2 (en) 2004-02-19 2012-06-26 Baker Hughes Incorporated Casing and liner drilling shoes having selected profile geometries, and related methods
US8297380B2 (en) 2004-02-19 2012-10-30 Baker Hughes Incorporated Casing and liner drilling shoes having integrated operational components, and related methods
US8225887B2 (en) 2004-02-19 2012-07-24 Baker Hughes Incorporated Casing and liner drilling shoes with portions configured to fail responsive to pressure, and related methods
US8006785B2 (en) 2004-02-19 2011-08-30 Baker Hughes Incorporated Casing and liner drilling bits and reamers
US8167059B2 (en) 2004-02-19 2012-05-01 Baker Hughes Incorporated Casing and liner drilling shoes having spiral blade configurations, and related methods
US8225888B2 (en) 2004-02-19 2012-07-24 Baker Hughes Incorporated Casing shoes having drillable and non-drillable cutting elements in different regions and related methods
US8191654B2 (en) 2004-02-19 2012-06-05 Baker Hughes Incorporated Methods of drilling using differing types of cutting elements
EP1811124A1 (fr) * 2006-01-18 2007-07-25 Omni Oil Technologies Outil pour élargir des trous de forage
US7900703B2 (en) 2006-05-15 2011-03-08 Baker Hughes Incorporated Method of drilling out a reaming tool
US7571769B2 (en) 2007-02-23 2009-08-11 Baker Hughes Incorporated Casing window milling assembly
US7954571B2 (en) 2007-10-02 2011-06-07 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
US8177001B2 (en) 2007-10-02 2012-05-15 Baker Hughes Incorporated Earth-boring tools including abrasive cutting structures and related methods
US8245797B2 (en) 2007-10-02 2012-08-21 Baker Hughes Incorporated Cutting structures for casing component drillout and earth-boring drill bits including same
US7878273B2 (en) * 2008-11-17 2011-02-01 Omni Ip Ltd. Ultra-hard drilling stabilizer
WO2010056373A1 (fr) * 2008-11-17 2010-05-20 Omni Ip Ltd. Stabilisateur de forage ultra dur
WO2015079003A3 (fr) * 2013-11-29 2015-07-23 Welltec A/S Colonne de tubage de production de fond
US11572740B2 (en) 2013-11-29 2023-02-07 Welltec Oilfield Solutions Ag Downhole production casing string
CN104141464A (zh) * 2014-07-28 2014-11-12 东北石油大学 水平井用井眼清洁工具
CN104141464B (zh) * 2014-07-28 2016-06-22 东北石油大学 水平井用井眼清洁工具

Also Published As

Publication number Publication date
GB9211946D0 (en) 1992-07-15
AU4342493A (en) 1994-01-04

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