EP0295045A2 - Trépan racleur rotatif avec des buses de nettoyage - Google Patents

Trépan racleur rotatif avec des buses de nettoyage Download PDF

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Publication number
EP0295045A2
EP0295045A2 EP88305172A EP88305172A EP0295045A2 EP 0295045 A2 EP0295045 A2 EP 0295045A2 EP 88305172 A EP88305172 A EP 88305172A EP 88305172 A EP88305172 A EP 88305172A EP 0295045 A2 EP0295045 A2 EP 0295045A2
Authority
EP
European Patent Office
Prior art keywords
cutting elements
bit body
fluid
bore hole
generally
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Withdrawn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
EP88305172A
Other languages
German (de)
English (en)
Other versions
EP0295045A3 (fr
Inventor
Michael F. Sabados
Charles M. Thompson
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.)
Reed Tool Co
Original Assignee
Reed Tool Co
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 Reed Tool Co filed Critical Reed Tool Co
Publication of EP0295045A2 publication Critical patent/EP0295045A2/fr
Publication of EP0295045A3 publication Critical patent/EP0295045A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
    • 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
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades

Definitions

  • This invention relates generally to drag type rotary drill bits, and more particularly to improvements in the arrangement of cutting elements and fluid discharge nozzles on the drill bit for obtaining a highly effective scouring action against the hole bottom immediately ahead of the associated cutting elements.
  • PDC polycrys­talline diamond compact
  • Balling is a build up of formation chips or cuttings on the bit face or the hole bottom and is caused by sticky formations, such as sticky shales or similar formations having clays therein, adhering to the bottom of the hole and the cutting face of the bit. This balling condition not only deters drilling, but it also causes rapid heat deterioration of the cutting elements due to poor circulation and decreased cutting efficiency.
  • This balling condition occurs primarily when using water based muds which cause a swelling of the clays. It is highly desirable to provide a bit dressed with polycrystalline diamond cutting elements which has the versatility to not only drill efficiently in soft, sticky formations when using water base muds, but also remains effective and durable when harder formations are encountered.
  • U. S. Patent No. 4,098,363 dated July 4, 1978 has a plurality of nozzles for each row of cutting elements with the nozzles being arranged in a spiral path extending from the center of the bit to the gage of the bit.
  • the nozzles do not direct streams of drilling fluid immediately ahead of the leading cutting elements, and since a large number of nozzles are provided, relatively small diameter orifices which are subject to clogging are required in order to maintain adequate discharge velocity.
  • U. S. Patent No. 4,499,958 discloses a deep bladed design for a drill bit using polycrystalline diamond cutting elements but this design does not have a desirable cleaning effect for the hole bottom and the edges of the cutting elements. Also, this type bit may be subjected to considerable wear and breakage when harder formations are encountered because of the relatively small number of cutting elements that can be arranged on the blades and the relatively long projection of the cutting elements from the adjacent bit body or blade.
  • U. S. Patent No. 4,505,342 discloses a drill bit which has a high density of polycrystalline diamond cutting ele­ments, and has fluid nozzles directed at the well bore bottom. After the fluid impinges the well bore bottom a portion of the fluid flows at a relatively low velocity through the fluid channels directing it in front of rows of cutting elements in an attempt to adequately flush all of the cutting elements and clean the hole bottom. The fluid velocity resulting in these channels is too low, however, to prevent balling and to provide adequate cleaning of the hole bottom and the cutting elements when drilling soft sticky formations with water base muds.
  • U. S. Patent Nos. 4,452,324; 4,471,845; 4,303,136; and 4,606,418 have dis­closed polycrystalline diamond drill bits with relatively large numbers of nozzle orifices in the bit in an attempt to adequately clean all of the cutting elements on the bit.
  • a large number of nozzle orifices will result in orifices of a small area and this will increase the proba­bility of clogging of some of the nozzle orifices.
  • a reduced velocity will result in the event the total orifice area for the bit is increased and this likewise will increase the probability of clogging of the nozzle orifices.
  • the present invention discloses a drag type rotary drill bit which shapes the bottom hole in the formation so that a generally arcuate concave outer ring or annular surface is formed along the bottom hole surface.
  • the cutting elements and associated nozzles are arranged so that the nozzles scour the hole bottom along the concave outer surface immediately ahead of the associated cutting elements for improving the cutting action of the cutting elements and thereby obtaining a high rate of penetration.
  • the cutting elements are arranged in a plurality of rows extending in a generally radial direction along an arcuate path from adjacent the longitudinal centerline of the bit to the gage of the bit which defines the diameter of the borehole.
  • Each row of cutting elements preferably is associated with one nozzle having an outwardly directed relatively large diameter fluid orifice to minimize clogging.
  • the plurality of closely spaced cutting elements in each row are arranged along an arcuate path generally complementary to the adjacent annular concave surface of the bottom hole.
  • the centerline of the outwardly directed stream of drilling fluid being discharged from each nozzle strikes the adjacent concave surface of the bottom hole at an angle of between around twenty-five (25) to sixty-five (65) degrees to the tangent of the adjacent curved concave surface thereby tending to scour or dig into the bottom hole surface for scouring at least a portion of the bottom immediately ahead of the associated cutting elements.
  • the scouring action continues as the discharged drilling fluid is directed along the concave hole bottom surface in a direction generally parallel to the associated row of cutting elements and then flows upwardly along the generally cylindrical side of the hole.
  • the fluid stream By striking the concave surface at an angle between twenty-five (25) to sixty-five (65) degrees the fluid stream is deflected in an upward direction by the concave arcuate surface and continues the scouring action as it flows along the concave surface to assist the upward flow of drilling fluid and entrained cuttings for removal from the hole.
  • An additional object of the invention is to provide in combination with the radially extending arcuate rows of cutting elements, at least one nozzle for each row for direct­ing a stream of drilling fluid against the adjacent arcuate concave bottom hole surface immediately in front of the associated row of cutting elements for the flow of fluid in an outward direction generally parallel to the associated row of cutting elements thereby to scour the concave bottom hole surface immediately before it is engaged in cutting contact by the adjacent associated cutting elements.
  • diamond diamond
  • polycrytalline diamond or “PDC” cutting elements, as used in the specification and claims herein shall be interpreted as including all diamond or diamond-like cutting elements having a hardness generally similar to the hardness of a natural diamond.
  • a drag type rotary drill bit is shown generally at 10 having a generally cylindrical bit body 12 with an externally threaded pin 14 at its upper end. Pin 14 is threaded within the lower end of the drill string indicated generally at 16 which is suspended from a drilling rig at the surface for rotating drill bit 10.
  • Drill bit body 12 has a longitudinally extending main fluid passage 18 which is adapted to receive drilling fluid or mud from a drilling rig for the drilling operation and a branch fluid line 19 leads from passage 18.
  • Bit body 12 has an upper outer peripheral surface 20 forming an outer gage, and a lower outer peripheral face or surface 22 generally indicated which forms a suitable crown and includes a generally frusto-conical outer surface 24 between the lower end of peripheral surfaces 20 and 22.
  • Extensions 26 have an outer arcuate surface 28 and the slots formed between extensions 26 provide a passage for the upward flow of drilling fluid and entrained cuttings.
  • a leading planar surface 29 is formed by each extension 26. It is to be understood that bit body 12 can be formed of various types of crown designs for the face of the bit body depending, for example, on such factors as the type of formation or the mud program proposed for the formation.
  • Bit body 12 may be formed of any suitable material, such as various types of steel or cast tungsten carbide.
  • blades 30 extend in a generally radial direction from the frusto-conical surface 24 between output peripheral surface 20 and lower generally horizontal surface 22. Blades 30 are spaced circumferentially about frusto-conical surface 24 at ninety (90) degree intervals. Each blade 30 has a generally planar leading surface 32, a generally planar rear surface 34, and an arcuate outer edge surface 36 extending between planar surfaces 32 and 34.
  • Each row of cutting elements 38 extends radially in a generally arcuate path along adjacent arcuate surface 36.
  • Each cutting element 38 is identical and comprises a stud 40 formed of a hardened tungsten carbide material. Stud 40 as shown in Figure 4 fits within an opening 42 in blade 30 and is secured therein, for example, by an interfer­ence fit or by brazing. Stud 40 has a planar leading surface on which a generally cylindrical disc 44 is secured, such as by brazing. Disc 44 has a base 46 formed of tungsten car­bide, an outer planar cutting face 48 defined by an outer diamond layer, and a peripheral cutting edge 50 extending about planar face 48. Cylindrical disc 44 with a diamond face and tungsten carbide base, as well known in the art, is manufactured by the Specialty Material Dept. of the General Electric Company at Worthington, Ohio and sold under the trademark "Stratapax”.
  • cutting face 48 have a negative rake or be inclined with respect to the direction of rotation of drill bit 10.
  • a negative rake angle of around twenty (20) degrees has been found to be satisfactory for most formations although it is believed that a negative rake between around five (5) degrees and around thirty-five (35) degrees will function adequately for a polycrystalline diamond face or a natural diamond face.
  • the bore hole as shown particularly in Figure 3 is generally cylindrical and is defined by a cylindrical side surface A, a central generally flat bottom surface B, and an arcuate concave annular surface C extending between surfaces A and B.
  • Arcuate concave surface C is formed by the arcuate rows of cutting elements 38 upon rotation of drill bit 10.
  • lower face 22 has a pair of rela­tively small diameter fluid discharge orifices 52 for the discharge of drilling fluid from fluid passage 18 vertically downwardly against the bore hole bottom shown at B.
  • a fluid discharge nozzle indicated generally at 54 as shown particularly in Figures 3 and 4.
  • Discharge nozzle 54 is formed of a tungsten carbide material and is externally threaded at 56 for being screwed within an internally threaded opening 58 defining a smooth annular end surface 59. Openings 60 in the face of nozzle 54 adjacent end surface 59 are adapted to receive a suitable tool for securing nozzle 54 within threaded opening 58 for abutting engagement with an abutting end shoulder 62.
  • a resilient 0-ring 64 is provided for sealing between nozzle 54 and bit body 12.
  • Nozzle 54 defines a relatively large diameter fluid discharge orifice 66 which may circular or oval in shape to provide a laterally divergent stream or jet of fluid illus­trated generally by broken lines at 68 on Figure 4.
  • the spray angle of orifice 66 will normally be around five (5) degrees, for example, and a relatively large diameter of over around three-sixteenth (3/16) inch is preferred for orifice 66.
  • the centerline of the jet of fluid being discharged from orifice 66 is shown at 70 and centerline 70 strikes concave surface C at a point P.
  • the divergent fluid stream has a surface area of impingement I against surface C about point P.
  • Centerline 70 with respect to a tangent T through point P is preferably around forty-five (45) degrees but satisfactory results are obtainable at an angle D between around twenty-five (25) degrees and sixty-five (65) degrees.
  • the fluid Upon striking concave surface C at an angle D, the fluid tends to dig into or scour the area of impingement I, such as shown schematically in Figures 2 and 4, and then is deflected in an upward direction while continuing to scour the concave surface C as the fluid flows upward along the concave hole bottom and along the associated row of cutting elements 38.
  • the scouring or scouring action of the fluid stream which is discharged at a high velocity of over one hundred (100) feet per second, clears or digs into the formation defined by the concave bottom hole surface and continues after striking the impinge­ment areas A with the deflected fluid stream being directed upwardly by the concave bottom surface which continuously changes the direction of fluid flow.
  • the flow of fluid after striking concave surface C is in a generally radial direction generally parallel to the row of cutting elements 38 and immediately ahead of the cutting elements.
  • area I is scoured by a high velocity stream of drilling fluid from nozzle 54 and the scouring action continues as the stream flows outwardly along the concave hole bottom thereby improving the cutting effec­tiveness of a cutting elements 38 while providing drilling fluid for washing the cutting faces of cutting elements 38.
  • FIG. 5-7 a separate embodiment of the invention is shown in which the rotary drill bit l0A is shown having an outer peripheral surface 20A and a lower generally hemispherical or bulbous surface 24A forming a smooth continuation of the outer peripheral surface 20A and terminating at a relatively small diameter generally horizon­tal lower central surface 22A.
  • Junk slots 27A are provided at ninety (90) degree intervals along outer peripheral surface 20A to provide passageways for the upward flow of drilling fluid and entrained cuttings.
  • Cutting elements 38A are mounted on the outer surface of drill bit 10A along frusto-conical or hemi­spherical surface 24A and extend upwardly in an arcuate radial path along outer peripheral surface 20A.
  • Cutting elements 38A are identical to those shown in the embodiment of Figures 1-4 and have studs 40A fitting within openings 42A in body 12A of drill bit l0A.
  • the rows of cutting elements 38A extend in a generally arcuate path radially from the centerline of the drill bit l0A.
  • a fluid discharge nozzle 54A is provided for each row of cutting elements 38A and has an orifice 66A. The centerline of the discharged fluid stream from orifice 66A is illustrated at 70A.
  • Centerline 70A strikes arcuate concave surface C of the bore hole at an angle D1 which is similar to angle D in the embodiment of Figures 1-4.
  • Drilling fluid is received from branch fluid passage 19A and is discharged in a stream or jet having its centerline at 70A for impinging concave surface C at point P with the fluid stream scouring the bore bottom immediately ahead of the associated row of cutting elements 38A and being deflected upwardly by concave surface C for flow out of the bore hole.
  • FIG. 5-7 does not utilize blades for the mounting of cutting elements 38A but instead, mounts cutting elements 38A into openings 42A ar­ranged in drill bit body 12A.
  • the arrangement of nozzles 54A and the fluid flow through orifices 66A is generally identical to that shown in the embodiment of Figures 1-4.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
EP88305172A 1987-06-09 1988-06-07 Trépan racleur rotatif avec des buses de nettoyage Withdrawn EP0295045A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59933 1979-07-23
US5993387A 1987-06-09 1987-06-09

Publications (2)

Publication Number Publication Date
EP0295045A2 true EP0295045A2 (fr) 1988-12-14
EP0295045A3 EP0295045A3 (fr) 1989-10-25

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EP88305172A Withdrawn EP0295045A3 (fr) 1987-06-09 1988-06-07 Trépan racleur rotatif avec des buses de nettoyage

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0365100A2 (fr) * 1988-10-20 1990-04-25 Shell Internationale Researchmaatschappij B.V. Tête de forage à système rotatif pour forer autravers de formations collantes
WO1990012191A1 (fr) * 1989-04-06 1990-10-18 Walton Paul G Trepan triangulaire de forage de puits de petrole
WO1993013290A1 (fr) * 1991-12-30 1993-07-08 Dresser Industries, Inc. Trepan avec outil de coupe ameliore
WO1996024744A1 (fr) * 1995-02-07 1996-08-15 Brit Bit Limited Ameliorations apportees a des trepans ou les concernant
FR2768456A1 (fr) * 1997-09-16 1999-03-19 Geophysique Cie Gle Forage de trous pour l'enfouissement d'un systeme d'emission ou de reception sismique
EP0872625A3 (fr) * 1997-04-16 2000-04-05 Camco International (UK) Limited Trépans de forage rotatif avec buses
EP0959224A3 (fr) * 1998-05-22 2000-07-12 Winton B. Dickey Buse a orifice transversal dans un trépan de forage PDC
GB2363415A (en) * 1997-09-19 2001-12-19 Baker Hughes Inc Drill bit with oriented coolant nozzles and coolant channels
CN102434090A (zh) * 2010-09-29 2012-05-02 张家口汇洋机械有限公司 碾压式旋挖破岩钻斗
WO2012116153A1 (fr) * 2011-02-24 2012-08-30 Foro Energy, Inc. Trépan laser-mécanique de haute puissance et procédés d'utilisation
US8424617B2 (en) 2008-08-20 2013-04-23 Foro Energy Inc. Methods and apparatus for delivering high power laser energy to a surface
US8571368B2 (en) 2010-07-21 2013-10-29 Foro Energy, Inc. Optical fiber configurations for transmission of laser energy over great distances
US8627901B1 (en) 2009-10-01 2014-01-14 Foro Energy, Inc. Laser bottom hole assembly
US8662160B2 (en) 2008-08-20 2014-03-04 Foro Energy Inc. Systems and conveyance structures for high power long distance laser transmission
US9027668B2 (en) 2008-08-20 2015-05-12 Foro Energy, Inc. Control system for high power laser drilling workover and completion unit
US9074422B2 (en) 2011-02-24 2015-07-07 Foro Energy, Inc. Electric motor for laser-mechanical drilling
US9080425B2 (en) 2008-10-17 2015-07-14 Foro Energy, Inc. High power laser photo-conversion assemblies, apparatuses and methods of use
US9089928B2 (en) 2008-08-20 2015-07-28 Foro Energy, Inc. Laser systems and methods for the removal of structures
US9138786B2 (en) 2008-10-17 2015-09-22 Foro Energy, Inc. High power laser pipeline tool and methods of use
US9244235B2 (en) 2008-10-17 2016-01-26 Foro Energy, Inc. Systems and assemblies for transferring high power laser energy through a rotating junction
US9242309B2 (en) 2012-03-01 2016-01-26 Foro Energy Inc. Total internal reflection laser tools and methods
US9267330B2 (en) 2008-08-20 2016-02-23 Foro Energy, Inc. Long distance high power optical laser fiber break detection and continuity monitoring systems and methods
US9347271B2 (en) 2008-10-17 2016-05-24 Foro Energy, Inc. Optical fiber cable for transmission of high power laser energy over great distances
US9360631B2 (en) 2008-08-20 2016-06-07 Foro Energy, Inc. Optics assembly for high power laser tools
US9360643B2 (en) 2011-06-03 2016-06-07 Foro Energy, Inc. Rugged passively cooled high power laser fiber optic connectors and methods of use
US9664012B2 (en) 2008-08-20 2017-05-30 Foro Energy, Inc. High power laser decomissioning of multistring and damaged wells
US9669492B2 (en) 2008-08-20 2017-06-06 Foro Energy, Inc. High power laser offshore decommissioning tool, system and methods of use
US9719302B2 (en) 2008-08-20 2017-08-01 Foro Energy, Inc. High power laser perforating and laser fracturing tools and methods of use

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116289A (en) * 1977-09-23 1978-09-26 Shell Oil Company Rotary bit with ridges
EP0029535A1 (fr) * 1979-11-19 1981-06-03 General Electric Company Eléments rapportés pour trépans de forage et scies
US4452324A (en) * 1980-10-21 1984-06-05 Christensen, Inc. Rotary drill bit
US4478297A (en) * 1982-09-30 1984-10-23 Strata Bit Corporation Drill bit having cutting elements with heat removal cores
EP0155026A2 (fr) * 1984-02-29 1985-09-18 Shell Internationale Researchmaatschappij B.V. Trépan de forage rotatif avec éléments de coupe comportant une fine couche abrasive
EP0182770A1 (fr) * 1984-11-12 1986-05-28 DIAMANT BOART Société Anonyme Outil de forage diamanté
EP0219992A2 (fr) * 1985-10-01 1987-04-29 Reed Tool Company Limited Trépan de forage rotatif
GB2185506A (en) * 1986-01-21 1987-07-22 Shell Int Research Rotary drill bit
US4682663A (en) * 1986-02-18 1987-07-28 Reed Tool Company Mounting means for cutting elements in drag type rotary drill bit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116289A (en) * 1977-09-23 1978-09-26 Shell Oil Company Rotary bit with ridges
EP0029535A1 (fr) * 1979-11-19 1981-06-03 General Electric Company Eléments rapportés pour trépans de forage et scies
US4452324A (en) * 1980-10-21 1984-06-05 Christensen, Inc. Rotary drill bit
US4478297A (en) * 1982-09-30 1984-10-23 Strata Bit Corporation Drill bit having cutting elements with heat removal cores
EP0155026A2 (fr) * 1984-02-29 1985-09-18 Shell Internationale Researchmaatschappij B.V. Trépan de forage rotatif avec éléments de coupe comportant une fine couche abrasive
EP0182770A1 (fr) * 1984-11-12 1986-05-28 DIAMANT BOART Société Anonyme Outil de forage diamanté
EP0219992A2 (fr) * 1985-10-01 1987-04-29 Reed Tool Company Limited Trépan de forage rotatif
GB2185506A (en) * 1986-01-21 1987-07-22 Shell Int Research Rotary drill bit
US4682663A (en) * 1986-02-18 1987-07-28 Reed Tool Company Mounting means for cutting elements in drag type rotary drill bit

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0365100A2 (fr) * 1988-10-20 1990-04-25 Shell Internationale Researchmaatschappij B.V. Tête de forage à système rotatif pour forer autravers de formations collantes
EP0365100A3 (fr) * 1988-10-20 1991-04-03 Shell Internationale Researchmaatschappij B.V. Tête de forage à système rotatif pour forer autravers de formations collantes
WO1990012191A1 (fr) * 1989-04-06 1990-10-18 Walton Paul G Trepan triangulaire de forage de puits de petrole
WO1993013290A1 (fr) * 1991-12-30 1993-07-08 Dresser Industries, Inc. Trepan avec outil de coupe ameliore
US5346025A (en) * 1991-12-30 1994-09-13 Dresser Industries, Inc. Drill bit with improved insert cutter pattern and method of drilling
WO1996024744A1 (fr) * 1995-02-07 1996-08-15 Brit Bit Limited Ameliorations apportees a des trepans ou les concernant
EP0872625A3 (fr) * 1997-04-16 2000-04-05 Camco International (UK) Limited Trépans de forage rotatif avec buses
FR2768456A1 (fr) * 1997-09-16 1999-03-19 Geophysique Cie Gle Forage de trous pour l'enfouissement d'un systeme d'emission ou de reception sismique
GB2363415A (en) * 1997-09-19 2001-12-19 Baker Hughes Inc Drill bit with oriented coolant nozzles and coolant channels
GB2363415B (en) * 1997-09-19 2002-06-26 Baker Hughes Inc Earth-boring drill bits with enhanced formation cuttings removal features
EP0959224A3 (fr) * 1998-05-22 2000-07-12 Winton B. Dickey Buse a orifice transversal dans un trépan de forage PDC
US8757292B2 (en) 2008-08-20 2014-06-24 Foro Energy, Inc. Methods for enhancing the efficiency of creating a borehole using high power laser systems
US8997894B2 (en) 2008-08-20 2015-04-07 Foro Energy, Inc. Method and apparatus for delivering high power laser energy over long distances
US8424617B2 (en) 2008-08-20 2013-04-23 Foro Energy Inc. Methods and apparatus for delivering high power laser energy to a surface
US8511401B2 (en) 2008-08-20 2013-08-20 Foro Energy, Inc. Method and apparatus for delivering high power laser energy over long distances
US9664012B2 (en) 2008-08-20 2017-05-30 Foro Energy, Inc. High power laser decomissioning of multistring and damaged wells
US9360631B2 (en) 2008-08-20 2016-06-07 Foro Energy, Inc. Optics assembly for high power laser tools
US8636085B2 (en) 2008-08-20 2014-01-28 Foro Energy, Inc. Methods and apparatus for removal and control of material in laser drilling of a borehole
US8662160B2 (en) 2008-08-20 2014-03-04 Foro Energy Inc. Systems and conveyance structures for high power long distance laser transmission
US8701794B2 (en) 2008-08-20 2014-04-22 Foro Energy, Inc. High power laser perforating tools and systems
US9562395B2 (en) 2008-08-20 2017-02-07 Foro Energy, Inc. High power laser-mechanical drilling bit and methods of use
US8820434B2 (en) 2008-08-20 2014-09-02 Foro Energy, Inc. Apparatus for advancing a wellbore using high power laser energy
US8826973B2 (en) 2008-08-20 2014-09-09 Foro Energy, Inc. Method and system for advancement of a borehole using a high power laser
US8869914B2 (en) 2008-08-20 2014-10-28 Foro Energy, Inc. High power laser workover and completion tools and systems
US9284783B1 (en) 2008-08-20 2016-03-15 Foro Energy, Inc. High power laser energy distribution patterns, apparatus and methods for creating wells
US8936108B2 (en) 2008-08-20 2015-01-20 Foro Energy, Inc. High power laser downhole cutting tools and systems
US10036232B2 (en) 2008-08-20 2018-07-31 Foro Energy Systems and conveyance structures for high power long distance laser transmission
US9027668B2 (en) 2008-08-20 2015-05-12 Foro Energy, Inc. Control system for high power laser drilling workover and completion unit
US9719302B2 (en) 2008-08-20 2017-08-01 Foro Energy, Inc. High power laser perforating and laser fracturing tools and methods of use
US9267330B2 (en) 2008-08-20 2016-02-23 Foro Energy, Inc. Long distance high power optical laser fiber break detection and continuity monitoring systems and methods
US9089928B2 (en) 2008-08-20 2015-07-28 Foro Energy, Inc. Laser systems and methods for the removal of structures
US9669492B2 (en) 2008-08-20 2017-06-06 Foro Energy, Inc. High power laser offshore decommissioning tool, system and methods of use
US9244235B2 (en) 2008-10-17 2016-01-26 Foro Energy, Inc. Systems and assemblies for transferring high power laser energy through a rotating junction
US9138786B2 (en) 2008-10-17 2015-09-22 Foro Energy, Inc. High power laser pipeline tool and methods of use
US9080425B2 (en) 2008-10-17 2015-07-14 Foro Energy, Inc. High power laser photo-conversion assemblies, apparatuses and methods of use
US9327810B2 (en) 2008-10-17 2016-05-03 Foro Energy, Inc. High power laser ROV systems and methods for treating subsea structures
US9347271B2 (en) 2008-10-17 2016-05-24 Foro Energy, Inc. Optical fiber cable for transmission of high power laser energy over great distances
US8627901B1 (en) 2009-10-01 2014-01-14 Foro Energy, Inc. Laser bottom hole assembly
US8879876B2 (en) 2010-07-21 2014-11-04 Foro Energy, Inc. Optical fiber configurations for transmission of laser energy over great distances
US8571368B2 (en) 2010-07-21 2013-10-29 Foro Energy, Inc. Optical fiber configurations for transmission of laser energy over great distances
CN102434090A (zh) * 2010-09-29 2012-05-02 张家口汇洋机械有限公司 碾压式旋挖破岩钻斗
US9074422B2 (en) 2011-02-24 2015-07-07 Foro Energy, Inc. Electric motor for laser-mechanical drilling
US9784037B2 (en) 2011-02-24 2017-10-10 Daryl L. Grubb Electric motor for laser-mechanical drilling
WO2012116153A1 (fr) * 2011-02-24 2012-08-30 Foro Energy, Inc. Trépan laser-mécanique de haute puissance et procédés d'utilisation
US9360643B2 (en) 2011-06-03 2016-06-07 Foro Energy, Inc. Rugged passively cooled high power laser fiber optic connectors and methods of use
US9242309B2 (en) 2012-03-01 2016-01-26 Foro Energy Inc. Total internal reflection laser tools and methods

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