WO2004029402A1 - Combined reamer and drill bit stabiliser - Google Patents

Combined reamer and drill bit stabiliser Download PDF

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Publication number
WO2004029402A1
WO2004029402A1 PCT/AU2003/001279 AU0301279W WO2004029402A1 WO 2004029402 A1 WO2004029402 A1 WO 2004029402A1 AU 0301279 W AU0301279 W AU 0301279W WO 2004029402 A1 WO2004029402 A1 WO 2004029402A1
Authority
WO
WIPO (PCT)
Prior art keywords
stabiliser
reamer
diameter
combined
inserts
Prior art date
Application number
PCT/AU2003/001279
Other languages
French (fr)
Inventor
Adel Ali Bassal
Original Assignee
Transco Manufacturing Australia Pty Ltd
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 Transco Manufacturing Australia Pty Ltd filed Critical Transco Manufacturing Australia Pty Ltd
Priority to AU2003265728A priority Critical patent/AU2003265728A1/en
Publication of WO2004029402A1 publication Critical patent/WO2004029402A1/en

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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
    • 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
    • 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
    • E21B17/1092—Gauge section of drill bits

Definitions

  • This invention relates to a combined reamer and stabiliser and in particular to a reamer stabiliser combination for attachment behind a drill bit.
  • Stabilisers are used to support a drill string or a drill bit within a hole being drilled.
  • the effective outer diameter of the stabiliser is substantially the same as the gauge diameter of the hole being drilled.
  • the use of a stabiliser in relation to a drill bit assists in direction and control of the hole being drilled.
  • Stabilisers may comprise a generally cylindrical body having hard facing such as tungsten carbide inserts or a coating of wear resistant material on those areas that come into contact with the wall of the hole being drilled.
  • the stabiliser can include fluted portions that are straight blades or helically shaped or may comprise a plurality of rollers having vertical axes of rotation that are mounted with respect to the stabiliser body. All of the above examples are those commonly known to people skilled in the art and will be included in the scope of this invention.
  • Reamers are used in association with drill bits to ensure that the hole is drilled to a constant diameter.
  • the hole can reduce in diameter for a number of reasons. Principal among these is wearing of the drill bit which results in a reduced diameter. Also, certain materials being drilled can swell which result in reduction of hole diameter.
  • Various methods have been used in the past to maintain constant hole diameter. However, this normally comprises passing an un-worn drill bit down the hole. This technique of reaming, and others, results in a significant step or transition to the required gauge diameter of the hole. This can result in jamming of reamer tools down the hole. Accordingly, it is an object of this invention to overcome the abovementioned problems, and to provide a combined tool which performs the functions of simultaneously stabilising and reaming.
  • the invention is a combined reamer and stabiliser for attachment to a drill string including: an elongate rod securable at its upper end to a drill rod and securable at its lower end to either a drill rod or a drilling tool, a stabiliser on said elongate rod that comprises a portion of elongate rod having a larger diameter that is matched to the gauge diameter of the hole being drilled, and a reamer below said stabiliser that comprises cutter means where a first portion of said cutter means has an effective cutting diameter that matches the gauge diameter of the hole being drilled and the remaining portion of said cutter means has an effective cutting diameter that is less than said first portion.
  • the rod is threaded for attachment to the drill string or drill bit components.
  • a variety of threaded couplings may be used, depending on the position within the drill string.
  • the stabiliser may be fluted with a series of helically shaped flutes where the outer surface of the ribs formed between the flutes contact the hole being drilled. These outer surfaces may have hardened elements attached to provide wear resistance. For example, a plurality of cylindrical carbide buttons may be inserted within each of these surfaces, or hard facing (wear resistant surface coating) may be used.
  • a plurality of rollers having hardened surfaces may be mounted around the periphery of the stabiliser for rotation about the vertical axis.
  • a part conical surface that may be interrupted by flutes, is located below the stabiliser (in a direction towards the cutting tool from the stabiliser) and the cutter means is located on this part conical surface.
  • the cutter means comprises rows of cutting inserts that are arranged at decreasing diameters for each successive row so that the reaming process can return a hole to gauge gradually rather than in one cutting step.
  • the portion below the stabiliser may be stepped so that rows of cutter means are at progressively reduced diameters.
  • the diameter of the first row of cutters on the reamer are within bit diameter tolerance or preferably substantially the same diameter as the drill bit at maximum tolerance.
  • the nominal diameter of the drill bit may be within the tolerance of +0.01 mm to -0.4 mm.
  • the effective cutting diameter of the first portion of the cutting means would be, within its own tolerance range, the diameter of the drill bit +0.01 mm.
  • Fig 1 shows a side view of a combined reamer and stabiliser
  • Fig 2 shows a drill string reamer and stabiliser
  • Fig 3 shows a cross-section of the reamer portion.
  • the combined reamer and stabiliser 10 comprises a stabiliser 11, a part conical portion 12 and an elongate rod 13.
  • the reamer and stabiliser 10 is used immediately behind a drilling tool. It has threaded portions at each end of the tool for connection to a drill rod and a drilling tool at its forward end.
  • the stabiliser 11 comprises an enlarged portion at the end of an elongate rod 13 with a plurality of helical ribs 14 with intervening flutes 15.
  • the outer surfaces of the ribs 14 have cylindrical tungsten carbide inserts 16 inserted therein. This provides a hard wear resistant surface.
  • the part conical portion 12 comprises tapered surfaces 17 to which two rows of tungsten carbide inserts 18 are secured.
  • the diameter of the first upper row are nominally at the same diameter of the drill bit at its upper manufacturing tolerance.
  • the second and subsequent lower rows have reducing effective cutting diameters.
  • the taper formed by the inserts may be less than the angle of the tapered surface 17.
  • the tolerance on the tool diameter may be +0.00mm and -0.89mm. Therefore, the first row has a diameter of 150mm which is equal to the nominal diameter of the drilling tool plus the maximum tolerance of 0.00.
  • the second row of inserts may be provided with a 0.125mm radial clearance, so may be reduced in diameter by comparison to the first row by 0.25mm.
  • the rows of carbide inserts 18 may also be inclined with respect to the longitudinal axis of the body 10 as it extends across each rib 14 as shown in Fig 1. Given the tapered surface 17 on each flute 14, this may result in a progressively changing diameter for each of the rows of carbides 18 so that the upper most carbide (in the direction away from the drilling tool) is at the maximum effective cutting diameter. However, in this embodiment the diameter around the first row of carbides 18 is the same, despite the slight inclination of each row on the flutes 14.
  • Fig 1 shows three rows of carbides 18 on each flute 14, but obviously two rows or more than three rows will also work satisfactorily.
  • the carbides 18 are conventional dome shaped carbides but other shaped cutting means may be used such as PCD cutters, a diamond coated cutting surface, or any other convenient means given the material being drilled.
  • Fig 3 shows in close detail how the carbides 18 are located in the part conical portion 12.
  • a milling cutter is used to form a depression 30 around the hole 31 within which the carbide 18 locates. This removes any sharp edges on the hole from which cracking may initiate. It also provides a recess to allow welding between the carbides 18 and the material within which they are located.
  • Three rows of carbide inserts 18a may be inserted on the upper end of the stabiliser 11. This assists in withdrawal of the drill string.
  • the combined stabiliser and reamer when used in conjunction with the drill bit, then there is a significant increase in the directional stability of the hole, and an improved performance and life for the drill bit given that it is held with greater stability.
  • the inventors believe that the combination of the stabiliser and reamer is a significant improvement in that the reamer ensures that there is continuous reaming contact between the hole wall and the stabiliser which reduces vibration or whirling of the drill bit or other drilling components. Also, close or continuous contact of the stabiliser with the hole damps axial vibrations of the drill string above and below the stabiliser.
  • Fig 2 shows the same inventive concept being used for a drill string stabiliser 20.
  • the drill string stabiliser 20 in addition to the tail 13, also has an elongate forward stem 21, and second tapered surfaces 17a with cutting means comprising carbide inserts 18a between the stabiliser 11 and the tail 13.
  • the carbide inserts 18a assist in the withdrawal of the drilling tool and drill string.
  • This embodiment works in the same way as that shown in Fig 1 in that the stabiliser 11 is kept in close contact with the hole wall.
  • the stabiliser 11 may also be at the upper or maximum tolerance diameter of the drilling tool, or a slightly larger diameter, to ensure that the stabiliser 11 is as close as possible to the hole wall.
  • the ribs 14 of the stabiliser 11 use a coating of wear resistant material rather than a series of carbide inserts as shown in Fig 1.

Abstract

The invention is a combined reamer and stabiliser for attachment to a drill string that includes an elongate rod (13) securable at its upper end to a drill rod and that is also securable at its lower end to either a drill rod or a drilling tool. The elongate rod (13) has a stabiliser (11) that comprises a portion of the elongate rod having a large diameter that is matched to the gauge diameter of the hole being drilled. A reamer (12) is located below the stabiliser (11) (in the direction of drilling) that comprises cutter means (18) where a first portion of the cutter means (18) has an effective cutting diameter that matches the gauge diameter of the hole being drilled and where the remaining portion of the cutter means (18) has an effective cutting diameter that is less than the diameter of the first portion. The combination of the reamer (12) with the stabiliser (11) that gradually increases the diameter of the hole being drilled to gauge diameter results in a far greater degree of stabilisation of either drill rods or a drilling tool.

Description

COMBINED REAMER AND DRILL BIT STABILISER
This invention relates to a combined reamer and stabiliser and in particular to a reamer stabiliser combination for attachment behind a drill bit.
BACKGROUND OF THE INVENTION
Stabilisers are used to support a drill string or a drill bit within a hole being drilled. The effective outer diameter of the stabiliser is substantially the same as the gauge diameter of the hole being drilled. The use of a stabiliser in relation to a drill bit assists in direction and control of the hole being drilled.
Stabilisers may comprise a generally cylindrical body having hard facing such as tungsten carbide inserts or a coating of wear resistant material on those areas that come into contact with the wall of the hole being drilled. The stabiliser can include fluted portions that are straight blades or helically shaped or may comprise a plurality of rollers having vertical axes of rotation that are mounted with respect to the stabiliser body. All of the above examples are those commonly known to people skilled in the art and will be included in the scope of this invention.
Reamers are used in association with drill bits to ensure that the hole is drilled to a constant diameter. The hole can reduce in diameter for a number of reasons. Principal among these is wearing of the drill bit which results in a reduced diameter. Also, certain materials being drilled can swell which result in reduction of hole diameter. Various methods have been used in the past to maintain constant hole diameter. However, this normally comprises passing an un-worn drill bit down the hole. This technique of reaming, and others, results in a significant step or transition to the required gauge diameter of the hole. This can result in jamming of reamer tools down the hole. Accordingly, it is an object of this invention to overcome the abovementioned problems, and to provide a combined tool which performs the functions of simultaneously stabilising and reaming.
SUMMARY OF THE INVENTION
In one aspect, the invention is a combined reamer and stabiliser for attachment to a drill string including: an elongate rod securable at its upper end to a drill rod and securable at its lower end to either a drill rod or a drilling tool, a stabiliser on said elongate rod that comprises a portion of elongate rod having a larger diameter that is matched to the gauge diameter of the hole being drilled, and a reamer below said stabiliser that comprises cutter means where a first portion of said cutter means has an effective cutting diameter that matches the gauge diameter of the hole being drilled and the remaining portion of said cutter means has an effective cutting diameter that is less than said first portion.
Preferably, the rod is threaded for attachment to the drill string or drill bit components. A variety of threaded couplings may be used, depending on the position within the drill string.
The stabiliser may be fluted with a series of helically shaped flutes where the outer surface of the ribs formed between the flutes contact the hole being drilled. These outer surfaces may have hardened elements attached to provide wear resistance. For example, a plurality of cylindrical carbide buttons may be inserted within each of these surfaces, or hard facing (wear resistant surface coating) may be used.
Alternately, a plurality of rollers having hardened surfaces may be mounted around the periphery of the stabiliser for rotation about the vertical axis. Preferably, a part conical surface, that may be interrupted by flutes, is located below the stabiliser (in a direction towards the cutting tool from the stabiliser) and the cutter means is located on this part conical surface. Preferably, the cutter means comprises rows of cutting inserts that are arranged at decreasing diameters for each successive row so that the reaming process can return a hole to gauge gradually rather than in one cutting step.
As an alternative to a conical surface, the portion below the stabiliser may be stepped so that rows of cutter means are at progressively reduced diameters. In both cases, it is preferable that the diameter of the first row of cutters on the reamer are within bit diameter tolerance or preferably substantially the same diameter as the drill bit at maximum tolerance. For example, the nominal diameter of the drill bit may be within the tolerance of +0.01 mm to -0.4 mm. The effective cutting diameter of the first portion of the cutting means would be, within its own tolerance range, the diameter of the drill bit +0.01 mm.
Other variations and alternatives for the invention will be readily understood by a person skilled in the art and should be understood to be included within the scope of this invention.
In order to fully understand this invention, a preferred embodiment will now be described. However, it should be realised that the scope of this invention is not to be limited to the features of this embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
This embodiment is illustrated in the accompanying drawing in which: Fig 1 shows a side view of a combined reamer and stabiliser, Fig 2 shows a drill string reamer and stabiliser, and Fig 3 shows a cross-section of the reamer portion. Referring to Fig 1, the combined reamer and stabiliser 10 comprises a stabiliser 11, a part conical portion 12 and an elongate rod 13. In this embodiment, the reamer and stabiliser 10 is used immediately behind a drilling tool. It has threaded portions at each end of the tool for connection to a drill rod and a drilling tool at its forward end.
The stabiliser 11 comprises an enlarged portion at the end of an elongate rod 13 with a plurality of helical ribs 14 with intervening flutes 15. The outer surfaces of the ribs 14 have cylindrical tungsten carbide inserts 16 inserted therein. This provides a hard wear resistant surface.
The part conical portion 12 comprises tapered surfaces 17 to which two rows of tungsten carbide inserts 18 are secured. The diameter of the first upper row are nominally at the same diameter of the drill bit at its upper manufacturing tolerance. The second and subsequent lower rows have reducing effective cutting diameters. The taper formed by the inserts may be less than the angle of the tapered surface 17. For example, in the case of a 150mm diameter drilling tool, the tolerance on the tool diameter may be +0.00mm and -0.89mm. Therefore, the first row has a diameter of 150mm which is equal to the nominal diameter of the drilling tool plus the maximum tolerance of 0.00. The second row of inserts may be provided with a 0.125mm radial clearance, so may be reduced in diameter by comparison to the first row by 0.25mm.
The rows of carbide inserts 18 may also be inclined with respect to the longitudinal axis of the body 10 as it extends across each rib 14 as shown in Fig 1. Given the tapered surface 17 on each flute 14, this may result in a progressively changing diameter for each of the rows of carbides 18 so that the upper most carbide (in the direction away from the drilling tool) is at the maximum effective cutting diameter. However, in this embodiment the diameter around the first row of carbides 18 is the same, despite the slight inclination of each row on the flutes 14. Fig 1 shows three rows of carbides 18 on each flute 14, but obviously two rows or more than three rows will also work satisfactorily. The carbides 18 are conventional dome shaped carbides but other shaped cutting means may be used such as PCD cutters, a diamond coated cutting surface, or any other convenient means given the material being drilled.
Fig 3 shows in close detail how the carbides 18 are located in the part conical portion 12. A milling cutter is used to form a depression 30 around the hole 31 within which the carbide 18 locates. This removes any sharp edges on the hole from which cracking may initiate. It also provides a recess to allow welding between the carbides 18 and the material within which they are located.
Three rows of carbide inserts 18a may be inserted on the upper end of the stabiliser 11. This assists in withdrawal of the drill string.
It has been found that, when the combined stabiliser and reamer is used in conjunction with the drill bit, then there is a significant increase in the directional stability of the hole, and an improved performance and life for the drill bit given that it is held with greater stability. The inventors believe that the combination of the stabiliser and reamer is a significant improvement in that the reamer ensures that there is continuous reaming contact between the hole wall and the stabiliser which reduces vibration or whirling of the drill bit or other drilling components. Also, close or continuous contact of the stabiliser with the hole damps axial vibrations of the drill string above and below the stabiliser.
Fig 2 shows the same inventive concept being used for a drill string stabiliser 20. In this case, in addition to the tail 13, the drill string stabiliser 20 also has an elongate forward stem 21, and second tapered surfaces 17a with cutting means comprising carbide inserts 18a between the stabiliser 11 and the tail 13. The carbide inserts 18a assist in the withdrawal of the drilling tool and drill string. This embodiment works in the same way as that shown in Fig 1 in that the stabiliser 11 is kept in close contact with the hole wall. The stabiliser 11 may also be at the upper or maximum tolerance diameter of the drilling tool, or a slightly larger diameter, to ensure that the stabiliser 11 is as close as possible to the hole wall. In this embodiment, the ribs 14 of the stabiliser 11 use a coating of wear resistant material rather than a series of carbide inserts as shown in Fig 1.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A combined reamer and stabiliser for attachment to a drill string including: an elongate rod securable at its upper end to a drill rod and securable at its lower end to either a drill rod or a drilling tool, a stabiliser on said elongate rod that comprises a portion of elongate rod having a larger diameter that is matched to the gauge diameter of the hole being drilled, and a reamer below said stabiliser that comprises cutter means where a first portion of said cutter means has an effective cutting diameter that matches the gauge diameter of the hole being drilled and the remaining portion of said cutter means has an effective cutting diameter that is less than said first portion.
2. A combined reamer and stabiliser according to claim 1 wherein the outer surface of said stabiliser comprises and abrasion resistant material.
3. A combined reamer and stabiliser according to claim 2 wherein said abrasion resistant material comprises a hard facing.
4. A combined reamer and stabiliser according to claim 2 wherein said abrasion resistant material comprises tungsten carbide inserts distributed over said stabiliser surface.
5. A combined reamer and stabiliser according to any one of the preceding claims further comprising a plurality of radially spaced helical flutes on said stabiliser.
6. A combined reamer and stabiliser according to any one of the preceding claims wherein said cutter means is mounted on a part conical surface below said stabiliser.
7. A combined reamer and stabiliser according to claim 6 as based on claim 5 wherein said helical flutes extend through said part conical surface.
8. A combined reamer and stabiliser according to any one of the preceding claims wherein said cutter means comprise radially and longitudinally spaced tungsten carbide inserts.
9. A combined reamer and stabiliser according to claim 8 wherein said inserts are dome-shaped.
10. A combined reamer and stabiliser according to either claim 8 or 9 wherein said inserts are arranged in at least two rows longitudinally spaced along said part conical surface.
11. A combined reamer and stabiliser according to claim 10 wherein said rows are inclined with respect to the longitudinal axis of said combined reamer and stabiliser.
12. A combined reamer and stabiliser according to either claim 10 or 11 comprising three rows of inserts.
13. A combined reamer and stabiliser according to any one of claims 8 to 12 wherein the upper most said inserts have an effective cutting diameter that equals the gauge diameter of the hole being drilled.
14. A combined reamer and stabiliser according to claim 13 wherein said effective cutting diameter of said upper most inserts substantially equals the diameter of said drilling tool at its maximum tolerance limit.
15. A combined stabiliser and reamer according to claim 13 as based on claim 11 wherein said upper row of inclined inserts are at said effective cutting diameter that equals the gauge diameter of the hole being drilled.
16. A combined stabiliser and reamer according to any one of claims 10 to 15 wherein said second row of inserts has an effective cutting diameter that is less than the effective cutting diameter of said first row.
17. A combined stabiliser and reamer according to claim 16 wherein a third row of inserts has an effective cutting diameter that is less than the effective cutting diameter of said first row.
18. A reamer having a portion that acts as a stabiliser according to any one of the preceding claims.
19. A combined reamer and stabiliser substantially as herein described with reference to the accompanying drawings.
PCT/AU2003/001279 2002-09-30 2003-09-30 Combined reamer and drill bit stabiliser WO2004029402A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003265728A AU2003265728A1 (en) 2002-09-30 2003-09-30 Combined reamer and drill bit stabiliser

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2002951839 2002-09-30
AU2002951839A AU2002951839A0 (en) 2002-09-30 2002-09-30 Combined reamer and drill bit stabiliser

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WO2004029402A1 true WO2004029402A1 (en) 2004-04-08

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Cited By (15)

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EP1811125A1 (en) * 2006-01-18 2007-07-25 Omni Oil Technologies Borehole reamer
EP1811124A1 (en) 2006-01-18 2007-07-25 Omni Oil Technologies Hole opener
EP1811126A1 (en) * 2006-01-18 2007-07-25 Omni Oil Technologies Conical downhole reamer
WO2007093771A1 (en) * 2006-02-14 2007-08-23 Smart Stabilizer Systems Limited Downhole assembly and cutter assembly
WO2010106335A2 (en) 2009-03-20 2010-09-23 Turbopower Drilling Sal Downhole drilling assembly
US20100263875A1 (en) * 2009-04-15 2010-10-21 Williams Adam R Drilling systems for cleaning wellbores, bits for wellbore cleaning, methods of forming such bits, and methods of cleaning wellbores using such bits
CN102003155A (en) * 2010-11-15 2011-04-06 中国石油集团西部钻探工程有限公司 Pear-shaped while-drilling breaker for underground falling blocks
GB2485857A (en) * 2010-11-29 2012-05-30 Arrival Oil Tools Inc A down-hole reaming apparatus
WO2013167954A2 (en) * 2012-05-11 2013-11-14 Tercel Ip Limited A downhole downhole assembly, tool and method
EP2801692A1 (en) * 2013-05-08 2014-11-12 Tercel IP Ltd. Downhole tool engaging a tubing string between a drill bit and tubular for reaming a wellbore
WO2015019114A3 (en) * 2013-08-08 2015-05-28 Paradigm Drilling Services Limited Downhole apparatus and method
WO2015181010A1 (en) * 2014-05-30 2015-12-03 Diarotech S.A. Stabilizer-reamer for drill string
US9273519B2 (en) 2012-08-27 2016-03-01 Tercel Ip Ltd. Downhole dual cutting reamer
CN106168116A (en) * 2016-08-25 2016-11-30 中国石油集团渤海钻探工程有限公司 With boring micro-reaming borehole wall dressing tool and using method thereof
US11286727B2 (en) 2016-11-18 2022-03-29 Modus Oilfield International Llc Multifunction wellbore conditioning tool

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Cited By (39)

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EP1811124A1 (en) 2006-01-18 2007-07-25 Omni Oil Technologies Hole opener
EP1811126A1 (en) * 2006-01-18 2007-07-25 Omni Oil Technologies Conical downhole reamer
EP1811125A1 (en) * 2006-01-18 2007-07-25 Omni Oil Technologies Borehole reamer
GB2448643B (en) * 2006-02-14 2011-02-02 Smart Stabilizer Systems Ltd Downhole assembly and cutter assembly
WO2007093771A1 (en) * 2006-02-14 2007-08-23 Smart Stabilizer Systems Limited Downhole assembly and cutter assembly
GB2448643A (en) * 2006-02-14 2008-10-22 Smart Stabilizer Systems Ltd Downhole assembly and cutter assembly
US7766102B2 (en) 2006-02-14 2010-08-03 Smart Stabilizer Systems Limited Downhole assembly and cutter assembly
EA031548B1 (en) * 2009-03-20 2019-01-31 Халлибёртон Энерджи Сервисиз, Инк. Downhole drilling assembly
US10119336B2 (en) 2009-03-20 2018-11-06 Halliburton Energy Services, Inc. Downhole drilling assembly
WO2010106335A3 (en) * 2009-03-20 2011-03-03 Turbopower Drilling Sal Downhole drilling assembly
US9249630B2 (en) 2009-03-20 2016-02-02 Halliburton Energy Services, Inc. Downhole drilling assembly
WO2010106335A2 (en) 2009-03-20 2010-09-23 Turbopower Drilling Sal Downhole drilling assembly
EA020877B1 (en) * 2009-03-20 2015-02-27 Халлибёртон Энерджи Сервисиз, Инк. Downhole drilling assembly
EP2677112B1 (en) * 2009-03-20 2019-06-12 Halliburton Energy Services, Inc. Downhole drilling assembly
CN103556941A (en) * 2009-03-20 2014-02-05 哈利伯顿能源服务公司 Downhole drilling assembly
US9714543B2 (en) 2009-03-20 2017-07-25 Halliburton Energy Services, Inc. Downhole drilling assembly
US8887836B2 (en) * 2009-04-15 2014-11-18 Baker Hughes Incorporated Drilling systems for cleaning wellbores, bits for wellbore cleaning, methods of forming such bits, and methods of cleaning wellbores using such bits
US20100263875A1 (en) * 2009-04-15 2010-10-21 Williams Adam R Drilling systems for cleaning wellbores, bits for wellbore cleaning, methods of forming such bits, and methods of cleaning wellbores using such bits
CN102003155A (en) * 2010-11-15 2011-04-06 中国石油集团西部钻探工程有限公司 Pear-shaped while-drilling breaker for underground falling blocks
US9151118B2 (en) 2010-11-29 2015-10-06 Arrival Oil Tools, Inc. Reamer
GB2485857B (en) * 2010-11-29 2013-02-20 Arrival Oil Tools Inc Reamer
GB2485857A (en) * 2010-11-29 2012-05-30 Arrival Oil Tools Inc A down-hole reaming apparatus
US9488008B2 (en) 2012-05-11 2016-11-08 Tercel Ip Ltd. Downhole assembly, tool and method
CN104736791B (en) * 2012-05-11 2017-09-08 特塞尔Ip有限公司 Downhole component, tool and method
CN104736791A (en) * 2012-05-11 2015-06-24 特塞尔Ip有限公司 A downhole downhole assembly, tool and method
US9284784B2 (en) 2012-05-11 2016-03-15 Tercel Ip Ltd. Downhole assembly, tool and method
WO2013167954A2 (en) * 2012-05-11 2013-11-14 Tercel Ip Limited A downhole downhole assembly, tool and method
AU2013257758B2 (en) * 2012-05-11 2016-11-24 Tercel Ip Limited A downhole assembly, tool and method
WO2013167954A3 (en) * 2012-05-11 2014-05-30 Tercel Ip Limited A downhole downhole assembly, tool and method
US9273519B2 (en) 2012-08-27 2016-03-01 Tercel Ip Ltd. Downhole dual cutting reamer
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