US3635296A - Drill bit construction - Google Patents

Drill bit construction Download PDF

Info

Publication number
US3635296A
US3635296A US43508A US3635296DA US3635296A US 3635296 A US3635296 A US 3635296A US 43508 A US43508 A US 43508A US 3635296D A US3635296D A US 3635296DA US 3635296 A US3635296 A US 3635296A
Authority
US
United States
Prior art keywords
bit
cutting
drilling
axis
rotation
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.)
Expired - Lifetime
Application number
US43508A
Other languages
English (en)
Inventor
Maurice P Lebourg
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3635296A publication Critical patent/US3635296A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E21B10/02—Core bits
    • E21B10/04—Core bits with core destroying means
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts

Definitions

  • the instant invention relates to a novel construction for rotary drill bits. More particularly, the instant invention is directed to a rotary drill bit construction which is useful in bits using hard cutting elements such as diamonds or the like and in which bits it is customary to form a central core within the bit to centralize and stabilize the bit for the drilling operation.
  • Drill bits utilizing diamonds or similar hard cutting elements are commonly employed in drilling operations, particularly in hard subterranean formations such as chert or the like.
  • the construction of such diamond drill bits usually includes a body portion having means for interconnection of the bit into a drill string, and a matrix portion for mounting the diamonds or other cutting elements.
  • Drilling fluid is directed down to the bottom of the borehole through the drilling string which is in communication with a port generally disposed in the central portion of the bit. Fluid passageways or water courses across the drilling surfaces of the bit are also provided to transport the drilling fluid across the face of the bit to cool and lubricate the drilling surface and to facilitate the removal of drill cuttings from the drilling area.
  • concave sections are often provided in the central portion of the lower face of the bit to enable concentration of additional diamonds or other hard cutting elements in that area to assist in crushing the formation.
  • the largest'diamonds in a diamond drill bit are located in this central area.
  • a central passageway may be provided in the bit permitting the formation of a generally conically shaped core which is primarily abraded from the side by the interior drilling surfaces of the bit.
  • Other bit constructions tend to encourage the formation of a fairly long rock core which is progressively thinner as it progresses up the center of the bit in hopes that the rock core will be fractured along its length and disposed of. in these latter instances, it is necessary to provide sufficiently large openings in the upper portion of the bit to enable the drilling fluid to carry away any large pieces of the central core which might break off.
  • a novel rotary drill bit having a second cutting face overlying the formation beneath the axis of rotation of the bit, which cutting face is caused to move across the formation in a direction opposite to the direction of rotation of the bit by virtue of frictional forces imposed upon this cutting face by the formation.
  • the novel rotary drill bit in accordance with this invention comprises a drill body having cutting elements embedded therein to provide a drilling surface; and a second cutting means, in addition to the drill face of the bit, mounted within the drill body and rotatable with respect to the drill body, the second cutting means having an axis of rotation eccentric to the axis of rotation of the drill bit and having a cutting surface which is open to and overlying that portion of the formation beneath the axis of rotation of the drill bit.
  • This secondary cutting face by virtue of its disposition eccentric to the drill bit is propelled in a direction opposite to the direction of rotation of the drill bit when it is in contact with the formation.
  • This independent rotation of the second cutting means propels its cutting elements across the surface of the formation at the very center of the drill bit and effectively drills this central part of the formation as opposed to crushing it.
  • lFluid passageways are provided adjacent this secondary cutting surface to remove cuttings from this region.
  • the secondary drilling face is disposed proximate the drilling face of the drill bit so that the secondary cutting surface drills that portion of the formation beneath the axis of rotation of the drill bit with the formation of a core of minimum size or, if desired, with formation of virtually no core at all.
  • FlG. l is a sectional view of a diamond drilling bit in accordance with the instant invention having a central channel for accepting a rather long core in the bit.
  • MG. 2 is a sectional view along line 2-2 of FIG. 1.
  • H6. 3 is a sectional view of a drill bit in accordance with the second embodiment of this invention wherein the size of the core is minimized.
  • FIG. 4 is a sectional view along line 4-4 of FIG. 3.
  • Drill bit Ill is shown in place in a subterranean formation ill and includes an upper shank member 13 which is interiorly threaded for interconnection in drill string 12.
  • Lower crown member of the bit has its lower portion faced with matrix 27 which is suitable for embedding cutting elements l9.
  • These cutting elements which may be diamonds, tungsten carbide particles or like metallic, intermetallic, or nonmetallic material, are possessed of sufficient hardness and abrade the formation. Such materials are well known in the art.
  • Matrix 27 is typically a hard abrasion and erosion resistant metal such as bronze, copper nickel alloy or the like, which can be cast upon crown member 15 to make a firm bond therewith.
  • the lower portion of crown member 15 is provided with a central passageway, shown in FIG. 1 to be occupied by central core 2i produced as the bit drills the fomtation.
  • Cutting elements R9 are embedded in the matrix by means known in the art defining a semitoroidal drilling surface for the bit which includes a reaming or gage face 22, a downward drilling face 2d, and a generally frustoconical inner coring face 118.
  • drilling fluid is directed to the bit through the interior to of drill string i2 and thence to the bit through a series of passages 17 in shank member 13 and ultimately across the face of the bit in fluid passageways or water courses 233.
  • These fluid passageways 23 take the form of grooves or channels in the matrix 2'7 which traverse the drilling face of the bit and extend from interior surface 18 across drilling face 2d and up reaming face 22 of the bit, emptying into volume 25 above shoulder 24.
  • These passageways serve to supply drilling fluid to the drilling surfaces of the bit to lubricate, cool and remove cuttings from the region of the cutting elements.
  • Shank member 13 is firmly but preferably removably secured to crown member 15, for example by suitable threads shown at 30. Disengagement of the crown member from the shank member is desirable in the bit construction shown in FIG. 1 in order to accomplish replacement or repair of the cutting wheel as will be appreciated hereinbelow.
  • This uncoupling ability in the bitshown in lFlG. B provides a bit in which the shank portion can be adapted to fit a number of crown members having somewhat varying placement arrangements of cutting elements. Varied designs of drilling bits, particularly diamond drilling bits, to meet specific downhole conditions are known in the art, and any such design which leaves the cutting wheel exposed to the formation in order to drill central core 21l could be used.
  • volume 29 through which drilling fluid passes on its route down to the drilling surfaces of the bit.
  • cutting wheel 31 Rotatably mounted in shank member 113, and extending into volume 29, is cutting wheel 31 which has a flat cutting face 33 in which are also embedded cutting elemenu 35 which may also be diamonds or similar hard cutnng elements.
  • the cutting wheel is mounted with a thick bearing portion 32 being received into shank member 13 for strength.
  • Cutting wheel 31 is adapted to be freely rotatable about an axis M-M, which axis is eccentric of the axis of rotation L-L of the bit itself, and is provided with thrust bearing 39 and O-ring seal 37 to preclude intrusion of fluid or drilling debris to the bearing surfaces of the cutting wheel.
  • a detent means may be used to retain it in its illustrated position.
  • any other suitable mounting method for cutting wheel 311 permitting the free rotation around an axis eccentric to the axis of the drill bit might be used.
  • Volume 29 is designed to be somewhat larger than would be necessary merely to accommodate cutting wheel 31. Cuttings from cutting wheel $1 must be readily accommodated within volume 29 without sticking until such cuttings can be removed through water courses 23. Note that at least one fluid passage 36 similar to passages l? is located to the right-hand side of cutting wheel 31 to prevent accumulation of cuttings in the right-hand portion of volume 2.9.
  • the surface of cutting face 353 of cutting wheel 31 can be provided with shallow ridges or recesses across the cutting face between the cutting elements to enable drilling fluid flow around the cutting elements to cool and lubricate them and to assist in carrying away cuttings from the cutting wheel.
  • shallow grooves are illustrated at 34. These grooves or recesses are quite shadlow and are not expected to carry as much fluid as water courses 23 across the drilling face of the bit.
  • drilling fluid is supplied through the drilling string 12 and fills volume 29 prior to escaping across the drilling surface of the bit through passageways 23.
  • the interior faces lid of the bit cause the formation of a columnar core 2i which eventually extends upward beyond the cutting elements of interior face 18 and contacts the cutting face 33 of cutting wheel 311.
  • arrow A indicates the normal direction of rotation of drill bit llll.
  • Core 2i is shown contacting the surface of cutting wheel 3i with the entire area of such contact on one side of the center of rotation lb of cutting wheel M.
  • the cutting face 335 of the cutting wheel frictionally engages the upper surface of core 23.
  • frictional forces perpendicular to the axis of cutting wheel 31 are exerted upon the cutting wheel by the core 2i.
  • the amount of frictional force (or more smcifically the amount of frictional resistance to hit rotation) exerted by the core on face 33 will be uniform over the entire area in which the core contacts face 33.
  • Drill bit 511 is provided with means (not shown) for interconnection in a drill string.
  • bit 51 is provided with a body member 52 which is cast with a matrix 59 having cutting elements 58.
  • the body member is also provided with fluid channels 55 which are in fluid communication with the supply of fluid in the drill string and which direct fluid into fluid passageways or water courses 57 across the face of the bit to empty above shoulder 59 and space oil.
  • Cutting wheel 71 with a cutting face 73 embedded with cutting elements 75 as above, is mounted in member 72 bolted with bolts to body member 52 and adapted to rotate about axis 0-0 which is eccentric of the axis of rotation of the bit N-N.
  • Cutting wheel 71 is mounted in the body with a thrust bearing 77 and an O-ring seal 79 together with pins 91 which pass through member 72 and lodge. in grooves 93 to retain the wheel in member 72.
  • the design of the embodiment of HO. 3 differs from the embodiment of HG. l in that cutting wheel 71 is mounted with its surface not far above the downward cutting face 60 thus affording for formation of a much shorter central cone 63 as the formation is drilled.
  • An eccentric opening in the lower face of the bit exposes the entire cutting surface 73 of cutting wheel "ill to the formation. Since interior coring face 62 will form a conical core of the shape indicated at 63, however, the core will contact the face 73 of the cutting wheel only as indicated on the left-hand side of axis 0-0.
  • the bit of FIG. 3 will otherwise operate similarlyto that described in FIG. 1.
  • the elimination of the coring face in the right-hand portion of the bit as illustrated leaves available volume 67 within opening (55 in which any large cuttings from the core can fall and thereby be emily removed from the cutting region without clogging the bit.
  • the cutting wheels shown in the embodiment illustrated are shown as having substantially flat cutting surfaces, and such flat cutting surfaces are preferred. As pointed out above, it is desirable to provide shallow ridges traversing the cutting face of the cutting wheel in order to enable drilling fluid to flow around the cutting elements to cool and lubricate them and to assist in carrying away cuttings from the cutting wheel. However, it should be understood that other shapes for cutting wheels may be used and accordingly, wheels with concave or convex toroidal cutting surfaces or the like may be employed.
  • the cutting wheel may be disposed in any desired fashion with respect to the body of the bit so long as it is eccentrically disposed over the core formed by the interior faces of the bit. However, it is preferred that the entire core surface contact the cutting wheel substantially on one side of the axis of rotation of the cutting wheel, since such disposition is more conducive to independent cutting wheel rotation.
  • bits in accordance with this invention may be made as will be appreciated by those skilled in the art. For example, it may be desirable to direct jets of fluid from passages such as passage 17 in the bit directly against the central portion of the core being drilled by the cutting wheel in order to assist in that operation. A similar modification of the embodiment shown in MG. 3 might also be accomplished to direct a jet stream of drilling fluid against the core to assist the drilling operation of the cutting wheel.
  • a rotary drill bit comprising:
  • a drill body having cutting elements to provide drilling surface and adapted to form a core
  • said means being disposed entirely within the drilling circle defined by the outermost of said cutting elements and having an axis of rotation which is eccentric of and parallel to the axis of rotation of said drill bit, and
  • said means having a substantially flat cutting surface disposed above the lowermost drilling surface of said drill bit;
  • said cutting surface being open to and overlying the core formed beneath the axis of rotation of the bit.
  • the rotary drill bit of claim 1 including fluid pamageways in said drill body for providing fluid to the vicinity of the cutting surface of said means.
  • the rotary drill bit of claim ll including a plurality of cutting elemenm disposed upon the cutting surface of said means, and shallow ridges on the cutting surface of said means between said cutting elements to afford access of drilling fluid to said cutting elements during drilling.
  • the rotary drill bit of claim ll including:
  • the rotary drill bit of claim 7 including means for providing a flow of drilling fluid to said volume.
  • the rotary drill bit of claim 9 wherein the cutting surface of said means is disposed in said central opening overlying the portion of the formation beneath the axis of rotation of the bit.
  • a rotary drill bit comprising:
  • a drill body having cutting elements and having an opening in the lower portion thereof for receiving an upstanding core at me center of the hole being drilled;
  • cutting elements disposed on said drilling body to describe a drilling surface having an outward reaming face, a downward drilling face, and an inner coring face within said opening;
  • the rotary drill bit of claim 12 including a plurality of cutting elements disposed upon the cutting surface of said secondary cutting means and shallow ridges on the cutting surface of said secondary cutting means between said cutting elements to afford access of drilling fluid to said cutting elements during drilling.
  • the rotary drill bit of claim 12 wherein said opening in the lower portion of said drill body is eccentric of the axis of rotation of said bit and exposes the entire cutting surface of said secondary cutting means.
  • the rotary drill bit of claim l5 including:

Landscapes

  • 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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
US43508A 1970-06-04 1970-06-04 Drill bit construction Expired - Lifetime US3635296A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4350870A 1970-06-04 1970-06-04

Publications (1)

Publication Number Publication Date
US3635296A true US3635296A (en) 1972-01-18

Family

ID=21927516

Family Applications (1)

Application Number Title Priority Date Filing Date
US43508A Expired - Lifetime US3635296A (en) 1970-06-04 1970-06-04 Drill bit construction

Country Status (6)

Country Link
US (1) US3635296A (fr)
BE (1) BE768143A (fr)
CA (1) CA949060A (fr)
CH (1) CH532710A (fr)
FR (1) FR2094043B1 (fr)
GB (1) GB1357640A (fr)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023172A1 (fr) * 1993-04-05 1994-10-13 Sds Pty. Ltd. Foret carottier a rotation et percussion
US5655614A (en) * 1994-12-20 1997-08-12 Smith International, Inc. Self-centering polycrystalline diamond cutting rock bit
EP0534037B1 (fr) * 1991-09-27 1998-06-03 Norvic S.A. Outil de forage à disques coupants
GB2355745A (en) * 1999-10-27 2001-05-02 Baker Hughes Inc Milling tool with offset cutting structure
US20030029643A1 (en) * 2000-03-21 2003-02-13 Mcleod Gavin T. Segment for a core drill bit and method of manufacture
US20070114071A1 (en) * 2005-11-21 2007-05-24 Hall David R Rotary Bit with an Indenting Member
US20070229232A1 (en) * 2006-03-23 2007-10-04 Hall David R Drill Bit Transducer Device
US20080099243A1 (en) * 2006-10-27 2008-05-01 Hall David R Method of Assembling a Drill Bit with a Jack Element
US20080296015A1 (en) * 2007-06-04 2008-12-04 Hall David R Clutch for a Jack Element
US20090236148A1 (en) * 2005-11-21 2009-09-24 Hall David R Flow Guide Actuation
US20090260894A1 (en) * 2005-11-21 2009-10-22 Hall David R Jack Element for a Drill Bit
US20100000799A1 (en) * 2006-03-23 2010-01-07 Hall David R Indenting Member for a Drill Bit
US20100000794A1 (en) * 2005-11-21 2010-01-07 Hall David R Lead the Bit Rotary Steerable Tool
US20100044109A1 (en) * 2007-09-06 2010-02-25 Hall David R Sensor for Determining a Position of a Jack Element
US20100065334A1 (en) * 2005-11-21 2010-03-18 Hall David R Turbine Driven Hammer that Oscillates at a Constant Frequency
US20100108385A1 (en) * 2007-09-06 2010-05-06 Hall David R Downhole Jack Assembly Sensor
US20100252331A1 (en) * 2009-04-01 2010-10-07 High Angela D Methods for forming boring shoes for wellbore casing, and boring shoes and intermediate structures formed by such methods
US20110048811A1 (en) * 2005-11-21 2011-03-03 Schlumberger Technology Corporation Drill bit with a retained jack element
US20110108326A1 (en) * 2009-11-09 2011-05-12 Jones Mark L Drill Bit With Recessed Center
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US8020471B2 (en) 2005-11-21 2011-09-20 Schlumberger Technology Corporation Method for manufacturing a drill bit
US8225883B2 (en) 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US20170030188A1 (en) * 2015-07-29 2017-02-02 Baker Hughes Incorporated Adaptive shell module with embedded functionality
WO2018116140A1 (fr) * 2016-12-19 2018-06-28 Flexidrill Limited Trépan hybride

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123881B (en) * 1982-07-20 1985-11-13 Sumitomo Metal Mining Co Well drilling bit
GB2294069B (en) * 1994-10-15 1998-10-28 Camco Drilling Group Ltd Improvements in or relating to rotary drills bits
EP0707130B1 (fr) * 1994-10-15 2003-07-16 Camco Drilling Group Limited Trépan de forage rotatif
AU2010232431B2 (en) 2009-04-02 2015-08-27 Epiroc Drilling Tools Llc Drill bit for earth boring

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587429A (en) * 1949-12-14 1952-02-26 Arutunoff Armais Drag bit
US2619325A (en) * 1952-01-02 1952-11-25 Arutunoff Armais Core disintegrating drilling tool
US2667334A (en) * 1951-03-03 1954-01-26 Standard Oil Dev Co Full hole diamond bit
US2738166A (en) * 1952-10-15 1956-03-13 Reed Roller Bit Co Diamond drilling bits
US2877988A (en) * 1957-05-03 1959-03-17 American Coldset Corp Drill bit with driven auxiliary bit
US2911196A (en) * 1957-05-03 1959-11-03 American Coldset Corp Diamond drill bit
US3077936A (en) * 1961-11-06 1963-02-19 Arutunoff Armais Diamond drill
US3084752A (en) * 1958-12-22 1963-04-09 Tiraspolsky Wladimir Drill bit tool for well drilling
US3424258A (en) * 1966-11-16 1969-01-28 Japan Petroleum Dev Corp Rotary bit for use in rotary drilling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1230512A (fr) * 1959-03-04 1960-09-16 Inst Francais Du Petrole Nouvel outil de forage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2587429A (en) * 1949-12-14 1952-02-26 Arutunoff Armais Drag bit
US2667334A (en) * 1951-03-03 1954-01-26 Standard Oil Dev Co Full hole diamond bit
US2619325A (en) * 1952-01-02 1952-11-25 Arutunoff Armais Core disintegrating drilling tool
US2738166A (en) * 1952-10-15 1956-03-13 Reed Roller Bit Co Diamond drilling bits
US2877988A (en) * 1957-05-03 1959-03-17 American Coldset Corp Drill bit with driven auxiliary bit
US2911196A (en) * 1957-05-03 1959-11-03 American Coldset Corp Diamond drill bit
US3084752A (en) * 1958-12-22 1963-04-09 Tiraspolsky Wladimir Drill bit tool for well drilling
US3077936A (en) * 1961-11-06 1963-02-19 Arutunoff Armais Diamond drill
US3424258A (en) * 1966-11-16 1969-01-28 Japan Petroleum Dev Corp Rotary bit for use in rotary drilling

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534037B1 (fr) * 1991-09-27 1998-06-03 Norvic S.A. Outil de forage à disques coupants
WO1994023172A1 (fr) * 1993-04-05 1994-10-13 Sds Pty. Ltd. Foret carottier a rotation et percussion
US5655614A (en) * 1994-12-20 1997-08-12 Smith International, Inc. Self-centering polycrystalline diamond cutting rock bit
GB2355745A (en) * 1999-10-27 2001-05-02 Baker Hughes Inc Milling tool with offset cutting structure
US6422328B1 (en) 1999-10-27 2002-07-23 Baker Hughes Incorporated Dual cutting mill
GB2355745B (en) * 1999-10-27 2002-11-06 Baker Hughes Inc Dual cutting mill
US20030029643A1 (en) * 2000-03-21 2003-02-13 Mcleod Gavin T. Segment for a core drill bit and method of manufacture
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US20110048811A1 (en) * 2005-11-21 2011-03-03 Schlumberger Technology Corporation Drill bit with a retained jack element
WO2007058802A1 (fr) * 2005-11-21 2007-05-24 Hall David R Ensemble trepan avec element de decoupe d'indentations
US7225886B1 (en) * 2005-11-21 2007-06-05 Hall David R Drill bit assembly with an indenting member
US7258179B2 (en) * 2005-11-21 2007-08-21 Hall David R Rotary bit with an indenting member
US8020471B2 (en) 2005-11-21 2011-09-20 Schlumberger Technology Corporation Method for manufacturing a drill bit
US8950517B2 (en) 2005-11-21 2015-02-10 Schlumberger Technology Corporation Drill bit with a retained jack element
US20070114071A1 (en) * 2005-11-21 2007-05-24 Hall David R Rotary Bit with an Indenting Member
US8225883B2 (en) 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US20070114067A1 (en) * 2005-11-21 2007-05-24 Hall David R Drill Bit Assembly with an Indenting Member
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US20100000794A1 (en) * 2005-11-21 2010-01-07 Hall David R Lead the Bit Rotary Steerable Tool
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US20100065334A1 (en) * 2005-11-21 2010-03-18 Hall David R Turbine Driven Hammer that Oscillates at a Constant Frequency
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8297378B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US8281882B2 (en) 2005-11-21 2012-10-09 Schlumberger Technology Corporation Jack element for a drill bit
US20090260894A1 (en) * 2005-11-21 2009-10-22 Hall David R Jack Element for a Drill Bit
US8267196B2 (en) 2005-11-21 2012-09-18 Schlumberger Technology Corporation Flow guide actuation
US20090236148A1 (en) * 2005-11-21 2009-09-24 Hall David R Flow Guide Actuation
US20070229232A1 (en) * 2006-03-23 2007-10-04 Hall David R Drill Bit Transducer Device
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US20100000799A1 (en) * 2006-03-23 2010-01-07 Hall David R Indenting Member for a Drill Bit
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8316964B2 (en) 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
US20080099243A1 (en) * 2006-10-27 2008-05-01 Hall David R Method of Assembling a Drill Bit with a Jack Element
US7954401B2 (en) 2006-10-27 2011-06-07 Schlumberger Technology Corporation Method of assembling a drill bit with a jack element
US7866416B2 (en) 2007-06-04 2011-01-11 Schlumberger Technology Corporation Clutch for a jack element
US8307919B2 (en) 2007-06-04 2012-11-13 Schlumberger Technology Corporation Clutch for a jack element
US20080296015A1 (en) * 2007-06-04 2008-12-04 Hall David R Clutch for a Jack Element
US20100108385A1 (en) * 2007-09-06 2010-05-06 Hall David R Downhole Jack Assembly Sensor
US20100044109A1 (en) * 2007-09-06 2010-02-25 Hall David R Sensor for Determining a Position of a Jack Element
US8499857B2 (en) 2007-09-06 2013-08-06 Schlumberger Technology Corporation Downhole jack assembly sensor
US7967083B2 (en) 2007-09-06 2011-06-28 Schlumberger Technology Corporation Sensor for determining a position of a jack element
US20100252331A1 (en) * 2009-04-01 2010-10-07 High Angela D Methods for forming boring shoes for wellbore casing, and boring shoes and intermediate structures formed by such methods
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US8839886B2 (en) 2009-11-09 2014-09-23 Atlas Copco Secoroc Llc Drill bit with recessed center
US20110108326A1 (en) * 2009-11-09 2011-05-12 Jones Mark L Drill Bit With Recessed Center
US20170030188A1 (en) * 2015-07-29 2017-02-02 Baker Hughes Incorporated Adaptive shell module with embedded functionality
US10519767B2 (en) * 2015-07-29 2019-12-31 Baker Hughes, A Ge Company, Llc Adaptive shell module with embedded functionality
WO2018116140A1 (fr) * 2016-12-19 2018-06-28 Flexidrill Limited Trépan hybride

Also Published As

Publication number Publication date
FR2094043A1 (fr) 1972-02-04
FR2094043B1 (fr) 1975-02-21
CH532710A (fr) 1973-01-15
GB1357640A (en) 1974-06-26
CA949060A (en) 1974-06-11
BE768143A (fr) 1971-11-03

Similar Documents

Publication Publication Date Title
US3635296A (en) Drill bit construction
US5553681A (en) Rotary cone drill bit with angled ramps
US3542142A (en) Method of drilling and drill bit therefor
US4221270A (en) Drag bit
US4792001A (en) Rotary drill bit
US4320808A (en) Rotary drill bit
US10017998B2 (en) Drill bits and earth-boring tools including shaped cutting elements and associated methods
US4926950A (en) Method for monitoring the wear of a rotary type drill bit
US3215215A (en) Diamond bit
US6349780B1 (en) Drill bit with selectively-aggressive gage pads
US4440247A (en) Rotary earth drilling bit
US3055443A (en) Drill bit
US5415243A (en) Rock bit borhole back reaming method
US5145017A (en) Kerf-cutting apparatus for increased drilling rates
US4981183A (en) Apparatus for taking core samples
US8191657B2 (en) Rotary drag bits for cutting casing and drilling subterranean formations
US5547033A (en) Rotary cone drill bit and method for enhanced lifting of fluids and cuttings
US3548959A (en) Relief-type jet bits
US2966949A (en) Full hole permanent drill bit
US4869330A (en) Apparatus for establishing hydraulic flow regime in drill bits
US3924698A (en) Drill bit and method of drilling
US5595255A (en) Rotary cone drill bit with improved support arms
US3433331A (en) Diamond drill bit
US1790613A (en) A corpo
US3322218A (en) Multi-port diamond bit