US3340939A - Core lifter apparatus - Google Patents

Core lifter apparatus Download PDF

Info

Publication number
US3340939A
US3340939A US483102A US48310265A US3340939A US 3340939 A US3340939 A US 3340939A US 483102 A US483102 A US 483102A US 48310265 A US48310265 A US 48310265A US 3340939 A US3340939 A US 3340939A
Authority
US
United States
Prior art keywords
core
lifter
core lifter
tube
case
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
US483102A
Other languages
English (en)
Inventor
Leonard A Lindelof
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.)
SPENCER WRIGHT INDUSTRIES Inc A CORP OF TENNESSEE
EJ Longyear Co
Original Assignee
EJ Longyear 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 EJ Longyear Co filed Critical EJ Longyear Co
Priority to US483102A priority Critical patent/US3340939A/en
Priority to GB36461/66A priority patent/GB1134204A/en
Priority to FR73184A priority patent/FR1489560A/fr
Priority to SE11507/66A priority patent/SE306510B/sv
Application granted granted Critical
Publication of US3340939A publication Critical patent/US3340939A/en
Assigned to SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE reassignment SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION, FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST
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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
    • E21B25/10—Formed core retaining or severing means
    • E21B25/12—Formed core retaining or severing means of the sliding wedge type

Definitions

  • This invention relates to new and novel improvements in core lifter apparatus for core barrels used for taking a core sample from an earth formation. More particularly this invention relates to the provision of a hardened snap ring in a core lifter case to prevent a core lifter moving into the core receiving tube during the drilling operation.
  • the term inner refers to that portion of the drill stem, or of the assembly, or an element of the assembly being described which in its position for use in the drill stem is located closer to core bit on the drill stem than any other portion of the apparatus being described, except where the term clearly refers to a transverse circumference, direction or diameter of the drill stem or other apparatus being described.
  • the term outer refers to that portion of the drill stem, or of the assembly, or element being described which in its position for use in the drill stem is located closer to the mouth of the drill hole than any other portion of the apparatus being described, except where the term clearly refers to a transverse circumference, direction or diameter of the apparatus being described.
  • FIGURES l-3 with one arranged above the other with the axial center lines aligned and lines A-A of FIG- URES 1 and 2 aligned, and lines BB of FIGURES 2 and 3 aligned, form a composite longitudinal section through a core barrel inner tube assembly having the core lifter apparatus of this invention and the drill stem when the assembly is in a latched core taking position, portions of FIGURE 3 being broken away;
  • FIGURE 4 is an enlarged fragmentary longitudinal section view of the inner end of the core drilling apparatus of FIGURE 3, said view being generally taken along the line and in the direction of the arrows 4-4 of FIGURE 6 to more clearly show the core lifter apparatus of this invention;
  • FIGURE 5 is a transverse cross sectional View generally taken along the line and in the direction of the arrows 5-5 of FIGURE 4 to show the stop ring seated in the core lifter case;
  • FIGURE 6 is a transverse cross sectional view generally taken along the line and in the direction of the arrows 6--6 of FIGURE 4 to show the core lifter seated in the core lifter case, and
  • FIGURE 7 is a further enlarged fragmentary cross sectional view generally taken along the lines and in the di rection of the arrows 77 of FIGURES 4 and 6 other than the core lifter is shown in a position abutting against the stop ring which in turn is shown abutting against the core receiving tube.
  • FIGURES 1-3 a wire line core barrel inner tube assembly will now be described, said assembly being generally designated 10.
  • the assembly 10 is illustrated generally in a horizontal condition, it is to be understood that it can be utilized when the drilling direction is vertically downwardly or inclined downwardly sufficiently that the assembly will fall to the bit end of the drill stem generally designated 11 in a manner described in US. Patent 2,829,868 to Pickard et al. or any desired direction including upwardly.
  • the drill stem 11 is made up of sections of pipe coupled together and having an annular drill bit 12 mounted on the inner end thereof.
  • the bit 12 has a central core receiving aperture 13.
  • the portion of the drill stem attached to or extending inwardly of pipe section 11a is commonly referred to as the core barrel outer assembly and is provided for receiving and retaining the core barrel inner tube assembly 10.
  • the core barrel outer tube assembly is composed of a core barrel outer tube 14, a reaming shell 15 threadedly con nected to the inner end of the tube 14, there being a hardened material such as diamonds (not shown) on the transverse outer reaming surface and on the annular drill bit 12 for drilling into earth formations from which the core sample is taken.
  • the bit 12 is threadedly connected to the inner end of the reaming shell.
  • the reaming shell and outer tube cooperatively provide an annular recess 16 for seating a stabilizer ring 17 in position to aid in retaining the core barrel inner tube assembly 10 in a centralized condition within the core barrel outer tube assembly.
  • Ring 17 has circumferentially spaced, axial grooves 17a to permit fluid to bypass said ring between the annular spaces between the inner tube and outer tube assemblies on axially opposite sides of the tioned pipe section, a guide coupling 21 is threadedly connected.
  • the innerend of the locking coupling in conjunction with the annular recess 21a of the guide coupling form a seat in the guide coupling against which the detents or latch dogs 23 of the core barrel inner tube assembly are seated for releasably retaining the assembly adjacent the core bit.
  • the inner end portion of the locking coupling has an inwardly projecting flange a that bears against a surface of a latch dog to cause said latch dog and other portions of the core barrel inner tube assembly to rotate with the drill stem when the latch dogs are in a latch seated position.
  • the opposite end of the guide coupling is threadedly connected to the outer end of the core barrel outer tube 14, the core barrel outer tube having an annular recess 14a to receivably mount a landing ring 18 in abutting engagement with the guide coupling (see FIGURE 2).
  • the landing ring forms a suspension shoulder in the core barrel outer tube. Since the core barrel outer tube is generally of a construction illustrated and explained in greater detail in US. Patent 3,120,282, issued Feb. 4, 1964, other than for the provision of the landing ring instead of a suspension flange, seating a ring 17, and a substantially longer locking coupling, it will not be described in greater detail.
  • the core barrel inner tube assembly 10 includes a latch body 26 having a pair of detents or latches 23 and a latch insert block 25 mounted thereon, a latch release tube 27 vfor retracting said latches, a core sample receiving tube 28, an inner tube cap 29 threaded into the outer end of the core barrel receiving tube, and a spindle 30 for connecting the cap to theinner end portion of the latch body for limited relative slidable movement.
  • a bearing 32 is mounted on the spindle in abutting engagement with the inner end of the bearing housing 33 which is also slidably mounted on said spindle and threadedly connected to cap 29; there being provided a coil spring 34 that at one end abuts against said bearing and at the opposite end against a nut 35 threaded on the spindle whereby the bearing housing is rotatable and movably axially a limited amount relative the spindle.
  • the bearing housing mounts the thrust bearing assembly 36 in abutting relationship with the metal spacer washer 37, there being provided resilient shut off valve washers 38 on the spindle between washer 37 and an annular member 39 abutting against a shoulder formed on the spindle.
  • the latch body has a shoulder 41 seatable against the landing ring 18 for normally retaining the core barrel inner tube assembly out of contact with the drill bit during the drilling operation.
  • shoulder 41 seatable against the landing ring 18 for normally retaining the core barrel inner tube assembly out of contact with the drill bit during the drilling operation.
  • all portions of the core barrel inner tube assembly axially inwardly of shoulder 41 are of diameters smaller than the minimum inside diameter of ring 18 in order that said portions may pass through the landing ring.
  • a fluid channel 44 is provided in the latch body to open to the annular spaces between the core barrel inner tube assembly and the core barrel outer tube assembly for bypassing drilling fluid around the landing ring when the core barrel inner tube assembly is in a latched core taking position.
  • a check valve assembly 45 mounted in channel 44 is a check valve assembly 45 to seat against valve seat 44a to substantially restrict flow of fluid in an axial direction from adjacent the core receiving tube toward the latch body, but to readily permit fluid flow through the channel in the opposite direction (arrow 46).
  • a through pin 48 pivotally mounts the latch dogs 23 in side by side relationship in the latch body slots 50, while pin 51 mounts the insert block on the latch body.
  • the construction of the latches 23 and the mounting thereof on the latch body is generally the same as that described in US. Patent 3,103,981, granted Sept. 17, 1963.
  • Tube 27 has slots 56 through which the outer transverse corner portions of the latch dogs may extend to latchingly engage the latch seat 21a.
  • a torsion spring 57 within slot 50 resiliently urges the latch dogs to pivot about through pin 48 to a position to latchingly engage the latch seat.
  • a right angle cut out 23a is provided in an outer corner of one of the latch dogs and an oppositely faced cut out 2312 of the substantially same size is formed in the other latch dog, the cut outs being located to form a generally rectangular, open ended slot when the latch dogs are spread apart to a latching position such as illustrated in FIGURE 1.
  • An axially elongated slot 58 is formed in the latch body on either side of the slot 50 to extend transversely thereto.
  • a through pin 60 is extended through the slots 58, and has its opposite ends mountingly retained within opposed apertures in the latch release tube so as to be moved therewith.
  • the pin 60 in cross section is of a slightly smaller dimension than that necessary to retain edges of the latch dogs in abutting engagement with the peripheral wall of the guide coupling which forms the latch recess when the pin bears against opposite axial edges of the slots 23a, 23b.
  • the slots 58 extend axially inwardly sufliciently such that when the pin 60 abuts against the inner edges thereof, the pin is located slightly axially outwardly of the transverse edges of slots 23a, 23b and the inner annular edge of the latch release tube abuts against the shoulder 55.
  • the length of the slots 58 limit the amount of axial movement of the latch release tube relative to the latch body.
  • a sub-assembly 62 forms an interconnection between the latch body and the latch release tube for resiliently urging the latch release tube to move relative the latch body to a position abutting against shoulder 55, but permitting movement of the latch release tube to retract the latches.
  • a plug is slidably mounted in the outer end of the latch release tube by a pin 66 secured in said tube and extended through a slot 67 in the plug.
  • the plug has a spear point 65 extending outwardly beyond the latch release tube.
  • the relative location of the pin 66, the slot 67 in the plug, and the axial dimension of the slot 67 are such that when the latch release tube abuts against the latch body shoulder 55, the pin 66 is a little outwardly of the inner transverse edge of the slot, and the inner surface 64a of the plug abuts against the sub-assembly 62 whereby the leather washer 69 may flex toward the latch release tube to permit fluid to bypass said plug.
  • washer 69 extends generally radially in abutting relationship with the latch release tube to form a fluid seal between the plug and the inner peripheral wall of the drill stem to permit hydraulically propelling assembly 10 toward the bit end of the drill stem regardless of the drilling direction (upwardly, downwardly or any desired angle).
  • the maximum diameter of any portion of the core barrel inner tube assembly inwardly of said enlarged diametric portion is not greater than the maximum diameter of any portion of assembly outwardly of said enlarged diametric portion.
  • Assembly 75 includes a core lifter case 76, having internal threads 76a at one end that form a matching fit with the external threads of the core receiving tube 28.
  • the case 76 has an annular groove or recess 77 that has a transverse annular edge 77a that is substantially coextensive with the inner annular edge 28a of inner tube 28 when the case is properly threaded on the inner tube.
  • Mounted in recess 77 is a hardened resilient split steel snap ring 78 that is axially split at 78a and which is also referred to herein as a stop ring.
  • the stop ring is substantially rectangular in longitudinal cross section through one arcuate portion thereof.
  • Recess 77 also has an axial surface 77b that is of a height h which is greater than the corresponding height s of the stop ring to permit limited axial movement of the stop ring in the recess.
  • Recess 77 also has a transverse annular edge 77c, the minimum radial dimension r of edge 77c being substantially greater than the corresponding dimension of edge 77a. Since ring 78 in a relaxed con-r dition has a greater outside radius than the radius of recess surface 77b; when the stop ring is seated in said recess, its outer axial edge will abut against surface 77b while edges 77a, 77c limit the axial movement of the stop ring relative the core lifter case.
  • the core lifter case has an axially elongated, gradually tapered axial inner surface 80 (for example, a taper of 2 30' in one embodiment of the invention) that at its outer end joins with the inner radial edge of surface portion 77c.
  • the angle of taper of the surface 80 is such that if the tapered surface were extended, it would intersect surface 771; intermediate surfaces 77a, 77c.
  • the inside diameter of the core lifter case at the intersection of surface 80 with recess edge 77c is accordingly greater than the inside diameter of, for example, the intersection of said taper surface with beveled surface 81 at the inner end of said case.
  • the last mentioned diameter is only slightly greater than the diameter of the core bit aperture and is substantially the same as the inside diameter of the core receiving tube.
  • the core lifter case at its inner axial end has the beveled surface 81 that is of progressively increasing diameter in an axial direction toward the core bit aperture and a transverseouter beveled surface 82 of an angle of taper to form a mating lit with the inclined shoulder 12a of the core bit. Due to the provision of spring 34, the core receiving tube and core lifter assembly can remain stationary in surrounding relationship to the core as the drill stem is retracted and thereby the latch body and spindle are initially retracted until beveled surface 82 abutsagainst shoulder 12a.
  • the core lifter case mounts for axial movement relative thereto a core lifter 85 for grippingly holding and breaking a core as the drill stem is retracted.
  • the core lifter comprises a resilient split spring steel ring having a plurality of circumferentially spaced, axially elongated ribs 85a that are adapted to grip and break off the core and retain the core in the inner tube as the core barrel inner tube assembly is retracted.
  • the core lifter has a transverse outer axial conical surface 85b that is tapered to mate with the core lifter case surface 80. Further the core lifter is longitudinally split at 86 so as to permit it to assume a shape of a smaller diameter in a conventional manner.
  • the general radius of curvature x of the transverse inner edges of the core lifter-ribs,.when the stop ring abuts against edge 77a and/ or 28a, and core lifter transverse edge 85c abuts againstthe stop ring, is substantially the same as the inner radius of the core receiving tube and the inner radius of the stop ring seated in recess 77.
  • core lifter assembly has been described with reference to a particularly hydraulically propellable core barrel inner tube assembly, it is to be understood that this assembly may be advantageously used on conventional core barrel equipment, i.e. on gravity type wire line core barrel equipment, for example, such as disclosed in US. Patent 2,829,868 in place of the core lifter and core lifter case disclosed therein or hydraulically propellable wire line core barrel equipment such as disclosed in US. Patent 3,120,282.
  • the core lifter case is axially spaced from the stop ring such as illustrated in FIGURE 4.
  • the core drilling operation is started whereby the cutting of core is begun. Because of the annular shape of the core hit, an ever deepening hole is cut with a rod like core being produced.
  • the core barrel outer tube and core bit move relative the core whereby the core extends through the core bit aperture and thence into the core lifter case to abut against the adjacent surfaces of the core lifter.
  • the core lifter case moves relative the core lifter until the core lifter abuts against the stop ring, and thence the stop ring and core lifter move relative the core lifter case until the stop ring abuts edge 77a and core lifter edge 85c. Thereafter the core lifter case, the core lifter, the stop ring and the core receiving tube move together as a unit relative the core.
  • the stop ring Due to the provision of the stop ring there is provided a hardened surface against which the core lifter can abut. As a result there is provided the generally transverse surface 780 of the stop ring that does not become rounded or tapered through long use and accordingly does not provide an inclined surface that would allow the core lifter to cock relative the longitudinal axis LL of the core receiving tube or to compress the core lifter such that it will move up into the receiving tube such as occurs with prior art core lifter apparatus.
  • the stop ring provides a hardened, generally planar annular surface 78c against which the core lifter surface 85c abuts during the core taking operation. Further, in the event the stop ring after considerable use becomes worn or damaged, it may be easily replaced without removing the core lifter from the core lifter case, the stop ring advantageously being provided with a couple of flats (not shown) in its transverse outer sur face to facilitate the insertion of a screw driven for removing the stop ring from recess 77.
  • a core lifter assembly that includes a core lifter case connected to one axial end of said tube to extend axially outwardly thereof, said case having an annular recess adjacent said tube that extends axially away from said end, a stop ring mounted in said recess and a core lifter mounted in said case for limited slidable relative movement between a position abutting against said stop ring and a position axially spaced therefrom, said case mounting said stop ring axially intermediate said tube and the core lifter.
  • the core lifter apparatus of claim 1 further characterized in that said core lifter case has a transverse inner tapered surface and that said core lifter has a transverse outer tapered surface of about a matching taper with the core lifter case, said surfaces being tapered toward said central axis in the direction that said case extends away from said tube, said core lifter case tapered surface intersecting said recess.
  • core barrel apparatus having a drill stem with a core bit at its inner end and a core barrel inner tube assembly adapted to be moved through the drill stem to a latched position adjacent the bit, said core barrel inner tube assembly including a core receiving tube and a core lifter having an outer tapered surface
  • said core lifter case having means for receivingly seating said stop ring adjacent the connection of said case to the core receiving tube and a transverse inner tapered surface of increasing transverse dimensions toward said seating means and axially opposite said seating means from said core receiving tube, said tapered surfaces being oppositely tapered and said stop ring having an inner transverse dimension less than the corresponding dimension of the tapered surface of the core lifter case that is most closely adjacent thereto and less than the corresponding maximum transverse outer dimension of the core lifter whereby said core lifter is axially slid
  • connection of the core lifter case to the core receiving tube is a threaded connection having one end portion of the core receiving tube extending into the core lifter case, said one end portion having a transverse annular edge axially adjacent said stop ring in the recess.
  • a core lifter case having a threaded end portion threadedly connected to said tube one end to extend axially away therefrom, said case having a transverse internal groove adjacent said tube and extending in axial spaced relation thereto, a core lifter mounted in said case, said core lifter and core lifter case having abutting surfaces permitting limited axial movement of the core lifter relative the case between a first axial position and a second axial position more remote from said tube, and means removably mounted in said groove for limiting the movement of the core lifter toward said tube to said first axial position, said means having an opening of a minimum transverse dimension approximately the same as the inside diameter of the core receiving tube.
  • core lifter apparatus comprising an axially elongated core lifter case having an end portion threadedly connectable to one end of said tube, said end portion having an annular internal recess adjacent to and extending axially away from the core receiving tube when said case is threadedly connected thereto, said case having a transverse inner conical surface of a gradual taper of progressively decreasing transverse dimensions in an axial direction toward said end portion, a resilient, hardened stop ring removably mounted in said recess, and a core lifter mounted in said core lifter case for limited axial movement, said core lifter having a transverse outer conical surface of a taper 0pposi'te the taper of the core lifter case in abutting engagement with said core lifter case conical surface, the last mentioned conical surface having a transverse dimension axially adjacent said recess substantially larger than the corresponding transverse inner dimension of the stop ring seated in said recess whereby the stop
  • NlLE C BYERS, 111., Examiner,

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US483102A 1965-08-27 1965-08-27 Core lifter apparatus Expired - Lifetime US3340939A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US483102A US3340939A (en) 1965-08-27 1965-08-27 Core lifter apparatus
GB36461/66A GB1134204A (en) 1965-08-27 1966-08-15 Core drilling apparatus
FR73184A FR1489560A (fr) 1965-08-27 1966-08-16 Appareillage de tube carottier pour sondage avec carottage
SE11507/66A SE306510B (sv) 1965-08-27 1966-08-25 Kärnlyftare

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US483102A US3340939A (en) 1965-08-27 1965-08-27 Core lifter apparatus

Publications (1)

Publication Number Publication Date
US3340939A true US3340939A (en) 1967-09-12

Family

ID=23918672

Family Applications (1)

Application Number Title Priority Date Filing Date
US483102A Expired - Lifetime US3340939A (en) 1965-08-27 1965-08-27 Core lifter apparatus

Country Status (4)

Country Link
US (1) US3340939A (sv)
FR (1) FR1489560A (sv)
GB (1) GB1134204A (sv)
SE (1) SE306510B (sv)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461981A (en) * 1968-04-30 1969-08-19 Longyear Co E J Wire line core barrel apparatus
US3485310A (en) * 1968-01-22 1969-12-23 Vincent Milosevich Wire line core barrel apparatus
US3874466A (en) * 1974-04-19 1975-04-01 New Jersey Zinc Co Core tube placement and retrieval
EP0052672A1 (fr) * 1980-11-21 1982-06-02 DIAMANT BOART Société Anonyme Procédé de récupération d'un tube intérieur de carottier, du type verrouillable et coulissable dans un train de tube extérieur, en forage montant, et dispositif de récupération prévue à cet effet
US4800969A (en) * 1987-11-24 1989-01-31 Longyear Company Fast descent core barrel apparatus
US4832138A (en) * 1987-05-13 1989-05-23 Diamant Boart S.A. Device to control the locking of a boring corer
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
US5020612A (en) * 1989-02-22 1991-06-04 Boart International Limited Wire line core drilling apparatus
US5031708A (en) * 1990-04-20 1991-07-16 Longyear Company Cockable corebreaker apparatus
US5325930A (en) * 1991-11-14 1994-07-05 Longyear Company Overcenter toggle latch apparatus
US5934393A (en) * 1997-02-19 1999-08-10 Boart Longyear International Holdings, Inc. Core barrel apparatus
US6089335A (en) * 1998-12-16 2000-07-18 Boart Longyear International Holdings, Inc. Positive latch core barrel apparatus
US20090283327A1 (en) * 2008-05-16 2009-11-19 Longyear Tm, Inc. Jointed spearhead assembly
US20110100718A1 (en) * 2009-11-03 2011-05-05 Longyear Tm, Inc. Core lifter
US20130192901A1 (en) * 2009-10-07 2013-08-01 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
US9151129B2 (en) 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve
WO2015188099A1 (en) * 2014-06-06 2015-12-10 Bly Ip Inc. Core lifter case and methods for using same
US9328608B2 (en) 2009-10-07 2016-05-03 Longyear Tm, Inc. Driven latch mechanism
EP2900899A4 (en) * 2012-09-25 2016-05-11 Ct Tech Pty Ltd DEMOLITION SYSTEM
WO2017015725A1 (en) * 2015-07-30 2017-02-02 Ct Tech Pty Ltd A ring replacement system for a core lifter assembly
US9689222B2 (en) 2009-10-07 2017-06-27 Longyear Tm, Inc. Core drilling tools with external fluid pathways
US20170292340A1 (en) * 2016-04-06 2017-10-12 Byron Harvey Wade Apparatus and method for withdrawing cores from drilled holes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278599A3 (en) * 1987-02-02 1988-12-07 Seiko Epson Corporation Photographic transfer type image forming apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829868A (en) * 1953-08-14 1958-04-08 Longyear E J Co Wire line core barrel
US3126064A (en) * 1964-03-24 miller
US3127943A (en) * 1962-03-05 1964-04-07 Christensen Diamond Prod Co Wire line core barrel
US3225845A (en) * 1961-02-17 1965-12-28 Joy Mfg Co Core barrel assembly
US3305033A (en) * 1964-03-04 1967-02-21 Longyear E J Co Core barrel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126064A (en) * 1964-03-24 miller
US2829868A (en) * 1953-08-14 1958-04-08 Longyear E J Co Wire line core barrel
US3225845A (en) * 1961-02-17 1965-12-28 Joy Mfg Co Core barrel assembly
US3127943A (en) * 1962-03-05 1964-04-07 Christensen Diamond Prod Co Wire line core barrel
US3305033A (en) * 1964-03-04 1967-02-21 Longyear E J Co Core barrel

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485310A (en) * 1968-01-22 1969-12-23 Vincent Milosevich Wire line core barrel apparatus
US3461981A (en) * 1968-04-30 1969-08-19 Longyear Co E J Wire line core barrel apparatus
US3874466A (en) * 1974-04-19 1975-04-01 New Jersey Zinc Co Core tube placement and retrieval
EP0052672A1 (fr) * 1980-11-21 1982-06-02 DIAMANT BOART Société Anonyme Procédé de récupération d'un tube intérieur de carottier, du type verrouillable et coulissable dans un train de tube extérieur, en forage montant, et dispositif de récupération prévue à cet effet
US4418770A (en) * 1980-11-21 1983-12-06 Societe Anonyme Diamant Boart Process for retrieving a coring barrel comprising two tubes and retrieving device for such a process
US4832138A (en) * 1987-05-13 1989-05-23 Diamant Boart S.A. Device to control the locking of a boring corer
US4800969A (en) * 1987-11-24 1989-01-31 Longyear Company Fast descent core barrel apparatus
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
US5020612A (en) * 1989-02-22 1991-06-04 Boart International Limited Wire line core drilling apparatus
US5031708A (en) * 1990-04-20 1991-07-16 Longyear Company Cockable corebreaker apparatus
US5325930A (en) * 1991-11-14 1994-07-05 Longyear Company Overcenter toggle latch apparatus
US5934393A (en) * 1997-02-19 1999-08-10 Boart Longyear International Holdings, Inc. Core barrel apparatus
US6089335A (en) * 1998-12-16 2000-07-18 Boart Longyear International Holdings, Inc. Positive latch core barrel apparatus
US7921926B2 (en) 2008-05-16 2011-04-12 Longyear Tm, Inc. Jointed spearhead assembly
US20090283327A1 (en) * 2008-05-16 2009-11-19 Longyear Tm, Inc. Jointed spearhead assembly
US9528337B2 (en) * 2009-10-07 2016-12-27 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
US20130192901A1 (en) * 2009-10-07 2013-08-01 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
US9689222B2 (en) 2009-10-07 2017-06-27 Longyear Tm, Inc. Core drilling tools with external fluid pathways
US9328608B2 (en) 2009-10-07 2016-05-03 Longyear Tm, Inc. Driven latch mechanism
US20110100718A1 (en) * 2009-11-03 2011-05-05 Longyear Tm, Inc. Core lifter
US8770320B2 (en) 2009-11-03 2014-07-08 Longyear Tm, Inc. Core lifter
US10612308B2 (en) 2009-11-03 2020-04-07 Bly Ip Inc. Core lifter
US9151129B2 (en) 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve
EP2900899A4 (en) * 2012-09-25 2016-05-11 Ct Tech Pty Ltd DEMOLITION SYSTEM
AU2014240642B2 (en) * 2013-03-14 2017-01-12 Longyear Tm, Inc. Up-hole bushing and core barrel head assembly comprising same
CN105209712A (zh) * 2013-03-14 2015-12-30 长年Tm公司 上孔衬套和包括上孔衬套的岩芯筒头组件
WO2015188099A1 (en) * 2014-06-06 2015-12-10 Bly Ip Inc. Core lifter case and methods for using same
WO2017015725A1 (en) * 2015-07-30 2017-02-02 Ct Tech Pty Ltd A ring replacement system for a core lifter assembly
US20170292340A1 (en) * 2016-04-06 2017-10-12 Byron Harvey Wade Apparatus and method for withdrawing cores from drilled holes
US10428612B2 (en) * 2016-04-06 2019-10-01 Byron Harvey Wade Apparatus and method for withdrawing cores from drilled holes

Also Published As

Publication number Publication date
GB1134204A (en) 1968-11-20
FR1489560A (fr) 1967-07-21
SE306510B (sv) 1968-12-02

Similar Documents

Publication Publication Date Title
US3340939A (en) Core lifter apparatus
US6089335A (en) Positive latch core barrel apparatus
US4281722A (en) Retractable bit system
US6425449B1 (en) Up-hole pump-in core barrel apparatus
US4800969A (en) Fast descent core barrel apparatus
US3225845A (en) Core barrel assembly
DE69316264T2 (de) Bohrloch-Werkzeug mit nichtmetallischen Keilen
US4834198A (en) Positive latch wire line core barrel apparatus
US5934393A (en) Core barrel apparatus
US3126064A (en) miller
US3461981A (en) Wire line core barrel apparatus
US3930679A (en) Dry hole wire core barrel apparatus
US3810514A (en) Center guided tile drill
US3305033A (en) Core barrel
US4313497A (en) Pressure control valve
US4272987A (en) Pressure core barrel flushing system
US3485310A (en) Wire line core barrel apparatus
US3540537A (en) Slotted core lifter apparatus
US2542679A (en) Combination sub for drilling operations
US3101735A (en) Side pocket mandrel with an automatic valve
US3428138A (en) Offset core lifter apparatus
US20100044055A1 (en) Well Tool Latching System
US2947074A (en) Nozzle puller
CN110566137B (zh) 一种防卡稳定器
US2799477A (en) Expansible drill bits

Legal Events

Date Code Title Description
AS Assignment

Owner name: SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST;FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION;REEL/FRAME:004248/0926

Effective date: 19840209