US3874466A - Core tube placement and retrieval - Google Patents

Core tube placement and retrieval Download PDF

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Publication number
US3874466A
US3874466A US462447A US46244774A US3874466A US 3874466 A US3874466 A US 3874466A US 462447 A US462447 A US 462447A US 46244774 A US46244774 A US 46244774A US 3874466 A US3874466 A US 3874466A
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US
United States
Prior art keywords
drill string
core tube
latch
tube
core
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
US462447A
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English (en)
Inventor
Emory Eugene Fulford
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.)
Manufacturers Hanover Trust Co
JPMorgan Chase Bank NA
Original Assignee
New Jersey Zinc 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 New Jersey Zinc Co filed Critical New Jersey Zinc Co
Priority to US462447A priority Critical patent/US3874466A/en
Priority to CA217,379A priority patent/CA1012530A/en
Priority to SE7500174A priority patent/SE412430B/sv
Priority to ZA00750243A priority patent/ZA75243B/xx
Priority to GB179075A priority patent/GB1475632A/en
Priority to JP791075A priority patent/JPS534041B2/ja
Priority to DE19752507220 priority patent/DE2507220A1/de
Application granted granted Critical
Publication of US3874466A publication Critical patent/US3874466A/en
Assigned to CHASE MANHATTAN BANK, N.A., THE, MANUFACTURERS HANOVER TRUST COMPANY reassignment CHASE MANHATTAN BANK, N.A., THE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HORSEHEAD INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Assigned to MANUFACTURERS HANOVER TRUST COMPANY reassignment MANUFACTURERS HANOVER TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HORSEHEAD INDUSTRIES, INC., A DE CORP.
Assigned to HORSEHEAD INDUSTRIES, INC. A CORP. OF DE reassignment HORSEHEAD INDUSTRIES, INC. A CORP. OF DE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 06/08/1984 Assignors: NEW JERSEY ZINC COMPANY, INC., A CORP. OF DE
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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

Definitions

  • a N 462,447 There is disclosed a drillvstring having an annular core I 1 pp 0 bit on the end thereof inside of which is placed a core tube for receiving cylindrical cores cut by the bit.
  • the Y Cl 175/236, 175/239, 75/247 core tube is positioned in core receiving relation to I [5 the bit merely the core tube through he Field of Search 249, 3 drill string.
  • the core tube is retrieved from the bore 175/246, 247; 166/1 156 hole by pumping a-core tube conditioning element through the drill string which engages the core tube References Cited and manipulates alatching mechanism thereof to dis- UNITED STATES PATENTS engage the core tube from the drill string.
  • FIG. IB FIG. IA
  • This invention provides a core tube providing substantial flexibility in placement and retrieval thereof.
  • the core tube of this invention may be pumped in and pumped out of either up, horizontal or down holes.
  • the core tube can likewise be pumped in and pulled out, as by a wire line, of either up, horizontal or down holes.
  • the disclosures in the prior art which provide pump in pump out core tubes usually have one or both of the following disadvantages: l) the devices employ valving structure which is subject to obstruction and/or erosion by well cuttings or drilling fluid; and (2) the latch mechanism is not positively locked but can be disengaged merely by pressure differentials.
  • FIGS. 1A, 1B and 1C are partial longitudinal cross sectional views of a drilling apparatus constructed in accordance with the principles of this invention, which when longitudinally aligned along the lines A-A and BB illustrate the entire drilling apparatus of this invention;
  • FIG. 2 is a view similar to FIG. 1A illustrating an unlatched position between the core tube and the surrounding drill string;
  • FIG. 3 is a horizontal cross sectional view of the del vice of FIG. 1A taken substantially along line 3-3 thereof as viewed in the direction indicated by the arrow;
  • FIG. 4 is a side elevational view, partly in section, illustrating an overshot which is used to manipulate the latching mechanism from the position shown in FIG. 1A to the position shown in FIG. 2.
  • a core drilling device 10 comprising a plurality of threadably connected joints of drill pipe 12, a landing nipple 14, and one or more pup joints l6, l8 constituting a drill string 20 having on one end thereof an annular or core bit 22.
  • the core drilling device 10 also comprises a core tube 24 which is latched to the drill string 20 in the position of FIG. 1 in core receiving relation relative to the bit 22.
  • the core tube 24 may be withdrawn from the drill string 20 in order to recover cores cut by the bit 22.
  • the core tube 24 is reinserted into the drill string for additional drilling.
  • the important functions of that portion of the drilling device 10 illustrated in FIGS. 1B and 1C are to receive and retain the core cut by the bit 22 with minimum damage thereto, to break the core so cut during or previous to withdrawal of the core tube 24 from adjacent the bit end of the drill string 20 and to allow circulation of drilling fluids through and around the drill string.
  • that portion of the drilling device 10 illustrated in FIGS. 1B and 1C may be of any suitable design, for purposes of brevity this portion of the drilling device 10 is illustrated as a Model AQ-U coreing device made by the Longyear Company.
  • the core tube 24 includes an inner core receiver 26 having core lifters 28 adjacent the bit and stabilizers 30 intermediate the core receiver 26 for centering the receiver 26. Adjacent the upper end of the core receiver 26 is a grease fitting 32 for injecting grease into a spring and bearing assembly 34. Above the spring and bearing assembly 34 is a dual shut-off valve arrangement'36 comprised of a plurality of rubber washers 38, 40 and a pair of metallic washers 42, 44. A nut 46 above the valve arrangement 36 allows pretensioning of the washers 38, 40 in a conventional manner.
  • valve arrangement 36 is an adjusting device 48 which allows the maintenance of an appropriate gap between the end of the core receiver 26 and the bit 22 as shown in FIG. 1C.
  • the adjusting device 48 comprises a nut 50 threaded on a rod 52.
  • the assembly 54 comprises a lower end 56 threaded on' to the rod 52 and an upper end providing a shoulder58 for support on an insert 60 received between the mal eand female couplings of the drill string 20.
  • the core tube 24 is accordingly restrained against further movement toward the bit 22 by the cooperation of the shoulder 58 and insert 60.
  • the assembly 54 provides an axial passage 62 com-- municatin g with a plurality of passages 64 above the insert 60 and a plurality of ;passages 66 below the insert 60.
  • the passages 62, 64, ;6 6 accordingly provide a bypass through the assembly ;54 which is closed by a ball check valve 68 biased in the closed direction by a spring 70.
  • An O-ring seal 72 provides a seal between the assembly 54 and the ,insert 60.
  • the core tube 24 comprises a tubular shell 74 integral with or attached to the valve cage and hangar assembly 54. Inside the shell 74 are a latch mechanism 76 and a latch actuating assembly 78.
  • the latch mechanism 76 comprises a pair of substantially identical latch elements 80, 82 mounted for pivo .tal movement about a common pin 84 for movementtends throug'h the shell 74 so that the forward nose of;
  • latch elements 80, 82 rest in an anvil 88.
  • a pair of pins 90 secure the anvil 88 to the shell 74.
  • the latch elements 80,82 respectively comprise an upwardly facing latch shoulder 92, 94 for abutting a downwardly facing shoulder 96 provided by the configuration of the male connection of the joint 12 and an enlarged groove 98 provided by the landing nipple 14.
  • the latch elements 80, 82 each provide an upwardly extending projection 100 providingan inclined camming surface 102 for moving and holding thelatch elements 80, 82 inthe unlatched position of FIG. 2'and an abutment 104 for of the elements 80, 82. So long as the member 106 is positively held in the position of FIG. 2 against the bias of the spring120, the latch elements 80, 82 are posi- -.tively prevented from moving toward a latched position.
  • the member 106 also includes a second section 128 comprised of a cylindrical valve body 130 connected to the first section 108 and" having a plurality of inclined passages 132 opening through the side of the valve body 130.
  • The-latch actuating assembly 78 constitutes an important part of this invention and includes an actuating member 106 extending axially of the core tube.24.
  • the merriber l0 6t includes a first generally cylindrical section 108 reciprocably slidably received in aligned axial openings afforded by a pair of bearing blocks 110, 112 which are secured to the shell 74, as by the provision of suitable set screws 114, 116.
  • the first section 108 includes an enlargement 118 thereon positioned between the bearing blocks 110, 112. As seen in FIG. 1A, the block 110 and enlargement 118 cooperate to provide a first limit of reciprocable movement of the memher 100 at a first latched position of the latch elements 82, 84.
  • a suitable spring 120 is disposed between the enlargement 118 and the block 112 for normally biasing-themember 106 toward the first latched position illustrated in FIG. 1A.
  • a lug or protuberance 122 which acts, in the first position of the member l06,'to engage the abutments 104 of the latch elements 80, 82'to prevent inward pivotal movement thereofout'of latching engagement with the drill string 20.
  • the lug 122 comes into its blocking position relative to the abutments 104 as the enlargement 1 18 approaches its first limit in'engagement'with the bearing block 110.
  • the lug 122 positively prevents movement ofthe latch elements 80, 82 toward the unlatched position thereof.
  • the camming element 124 Positioned on thefirst section 108 between the enlargement 1l8 and the lug 122 is a camming element ,124 located below the bearing block 112.
  • the camming element 124 provides'an internal generally frustoconical.camm'ing'surface 126 adapted to engage the camming surfaces 102 of the latch elements 80, 82
  • the camming element 124 moves the latch elements 80, 82 to the unlatched position thereof in response .to movement of the member 106 toward the bit 22. It will be seen that the limit of movement of the member 106 toward the bit 22 is determined by engagement of the camming member '124 with the latch elements 80, 82 rather than 'coaction of the enlargement 118 and the spring 120.In any event, there is provided a second limit of reciprocable movement of the member106 at a second unlatched position bular shell 74 are sized to provide a relatively close mating fit throughout the limits of movement of the valve body 130. i
  • each of the, valve passages 132 registers with a passage 138 in the tubular shell 74 when the latch actuating mechanism 78 is in its latched position. It will accordingly be apparent that drilling fluid pumped down the drill string as suggested by the arrow 140 flows through the passages 134, 132, 138 into the annulus between the core tube 24 and the drill string 20 as suggested by the arrows 142.
  • a collar or coupling member 144 Threaded onto the top of the tubular shell 74 is a collar or coupling member 144 providing a surface 146 abutting the top of the valve body 130 at the latched position of the mechanism 78.
  • a sealing washer 148 is captivated between the collar 144 and a nut 150 for sealing against the inside of the drill string 20.
  • a fishing neck or spear point 152 is threaded onto the top of the collar 144.
  • the normal position of the latch actuating mechanism 78 is the latched position of FIG. 1A because ofthe bias afforded by the spring 120.
  • the operator presses on the sleeve 136 to collapse the spring 120 and thereby retract the latch elements 80, 82 into the configuration shown in FIG. 2.
  • the core tube 24 is then inserted into the open collar of the drill pipe joint exposed at the drilling machine until the latch elements 80, 82 are inside this joint.
  • the inner diameter of the drill pipe 12 is small enough to prevent the latch elements 80, 82 from opening a sufficient distance to allow the lug 122 to enter between the abutments 104.
  • the core tube 24 is pushed completely into the joint of drill pipe exposed at the drilling machine and a cap is threaded onto this joint. Suitable pressure connections are afforded by the cap so that water or other drilling fluid may be pumped into the drill string 20. Pumping into the cap acts against the seal 148 to pump the core tube 24 through the drill string 20 toward the bit 22. As the core tube 24 approaches the bit end of the drill string 20, the shoulder 58 engages the insert 60 and prevents further movement of the core tube 24 toward the bit 22.. The spacing between the insert 60 and the landing nipple 14 is such that the latch elements 80, 82 are aligned with the shoulder 96.
  • the overshot 154 comprises abody 1.56 having a pair of latch arms 158, 160 mounted for rotation about a pivot pin 162.
  • the arms 158, 160 provide grappling shoulders 164, 166 respectively for latching onto a shoulder 168 (FIG. 2) of the fishing neck 152.
  • the body 156 carries a member 170 positioned relative to the shoulders 164, 166 for engaging and depressing the sleeve 136 from the position shown in FIG. lA.to the position shown in FIG'. 2 in response to latching of the overshot 154 onto the fishing neck 152.
  • a spring 172 biases the arms 1'58, 160 toward 'a latched position for snapping about the shoulder 168. It will be seen that the inclined surface 174 on the fishing neck 152 acts to spread the arms 158, 160 preparatory to latching onto the shoulder 168.
  • the body 156 For sealing against the inside of the drill string 20 the body 156 carries a washer 176 capivated by a nut 178.
  • the upper end of the overshot 154 includes a cap 180 having a spear point or fishing neck 182 thereon for purposes more fully explained hereinafter.
  • Drilling fluid is then pumped into the drill string 20 which acts against the washer 176 to move the overshot 154 through the drill string 20 toward the bit 22. Drilling fluid captivated in the drill string between the washers 148, 176 moves through the passages 134, 132, 138 in the manner suggested by the arrows 140, 142.
  • the member 170 engages the sleeve 136 and moves the same toward the bit end of the drill string fromthe position illustrated in FIG. 1A to the position illustrated in FIG. 2. As the member 170 abuts the top of the fishing neck 152, the shouldersl64, 166 of the latch arms 158,
  • I60 engage'under the shoulder 168 to positively mechanically hold the sleeve 136 in the position illustrated in FIG. 2. It is apparent'that movement of the sleeve 136 toward the bit end of the drill string'20 effects movement ofthe member 106 toward the position illustrated in FIG. 2. Consequently, the valve body 130 moves so that the passages 132,138 are no longer in registry. Thus,fluid communication across the sealing washer 148 is interrupted. Contemporaneously, the camming member 126 engages the projections 100 of the latch elements 80, 82 thereby retracting thesame out of engagement with the shoulder 96'provided by the landing nipple 14. It is accordingly apparent that the core tube 24 is free for movementin thedrill string 20 away from the bit end thereof.
  • the latch 76 is positively mechanically held in both the latched arid uiilatched posi-' I tions and does not depend on fluid p're'ssure'diffeientials to maintain the latch mechanism in either of its positions.
  • the valve particularly insensitive to erosion from drilling fluid and/or cuttings;
  • the sealing sur-- faces are not themselves subject to erosion from drilling. fluid during drillings.
  • the interiorsurface of the tubular shell 74 is exposed to drilling fluid. It will be apparent, howeverfthat the drilling fluid does not-flow through the shell 74 during retrieval of the core tube 24. It will also be apparent that the position of the passage 138 may be adjusted slightly so that it is closed by the upper portion of the valve body 130 during retrieval ofithe core tube 24 so that the sealing surfaces are not exposed todrilling fluid during either configuration of the core tube 24.
  • the overshot 154 at the core tube latched thereto can be retrieved from inside the drill string ei- .ther by .reverse circulation, as mentioned previouslymr by wireline.
  • a wi'reline maybe at-- tached by a pull-out socket to the neck 182 before pumping the overshot 154into thedrill string 20.
  • a separate wireline retrievableovershot may be placed into the drill string 20 to retrieve the overshot 1'54 and core tube 24 attached thereto.
  • means for moving the member beween the first and second positions thereof including means normally biasing the member toward the first position thereof;
  • the core tube includes a tubular shell housing the latch and the member.
  • the core tube of claim 2 further comprising means for allowing circulation of drilling fluid through the drill string past a sealing means when the latch is in the latched position thereof, the circulation allowing means including a valve body, inside the shell, carried by the member for reciprocable movement and defining the first passage opening through the side thereof;
  • a sleeve rigid with the valve body extending longitudinally of the core tube, and spanning the sealing means, the sleeve providing a second passage communicating at one end thereof with the first passage and opening at the other end thereof exteriorly of the core tube;
  • the tubular shell providing therethrough a third passage registering with the first passage in the first position of the member.
  • circulation allowing means includes means for preventing circulation of drilling fluid through the drill string past the sealing means when the latch is in the unlatched position, the circulation preventing means including means for moving the valve body relative to the tubular shell and misaligning the first and third passages contemporaneously with movement of the member away from the first position toward the second position.
  • the core tube of claim 4 further comprising a coupling member attached to one end of the tubular shell providing an opening therethrough receiving the sleeve. the sleeve extending beyond the end of the coupling member in the first position of the actuating member.
  • a core drilling tool for attachment to a hollow drill string comprising an elongate pumpable core tube mounted for movement between a first location for receiving a core and a second location spaced axially along the drill string from the first location, the tube comprising a core receiving end and an other end; means for sealing intermediate the two ends between the tube exterior and the drill string interior; a latch movable between a latched position for securing the tube at the first location to the drill string and an unlatched position freeing the tube for movement through the drill string;
  • the holding means including an actuating member extending longitudinally of the core tube and mounted for reciprocable movement between first and second positions corresponding respectively to the latch and unlatched positions of the latch;
  • the circulation means comprising a valve body, rigid with the actuating member, in-
  • the core tube providing a third passage opening exteriorly of the core tube at a location between the sealing means and the core receiving end, aligned with the first passage in the first position of the actuating member for allowing fluid travel past the sealing means in the first position of the actuating member and misaligned with the first passage in the second position of the actuating member for preventing fluid travel past the sealing means in the second position of the actuating member;
  • a coring tool for attachment to a hollow drill string comprising an elongate pumpable core tube, mounted for movement between a first position in core receiving relation to a bit and a second position spaced axially along the drill string from the first position, the tube comprising:
  • a latch movable between a latched position for securing the tube at the first position to the drill string and an unlatched position freeing the tube for movement;
  • means for holding the latch in the latched position and for holding the latch in the unlatched position including an actuating member extending longitudinally of the core tube;
  • means for moving the member between the first and second positions thereof including means normally biasing the member toward the first position thereof;
  • the circulation means including a valve body, inside the shell, carried by the member for reciprocable movement therewith and defining a first passage opening through the side thereof;
  • a sleeve rigid with the valve body, extending longitudinally of the core tube and spanning the sealing means, the sleeve providing a second passage communicating at one end thereof with the first passage and opening at the other end thereof exteriorly of the core tube;
  • a tubular shell providing therethrough a third passage registering with the first passage in the first position of the actuating member; and the sleeve being positioned exteriorly of the core tube for engagement with the securement means for moving the valve body relative to the tubular shell and misaligning the first and third passages contemporaneously with movement of the actuating member away from the first position toward the second position thereof.

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  • 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)
US462447A 1974-04-19 1974-04-19 Core tube placement and retrieval Expired - Lifetime US3874466A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US462447A US3874466A (en) 1974-04-19 1974-04-19 Core tube placement and retrieval
CA217,379A CA1012530A (en) 1974-04-19 1975-01-06 Core tube placement and retrieval
SE7500174A SE412430B (sv) 1974-04-19 1975-01-08 Kernborrverktyg
ZA00750243A ZA75243B (en) 1974-04-19 1975-01-14 Core tube placement and retrieval
GB179075A GB1475632A (en) 1974-04-19 1975-01-15 Coring tools for hollow drill strings
JP791075A JPS534041B2 (sv) 1974-04-19 1975-01-20
DE19752507220 DE2507220A1 (de) 1974-04-19 1975-02-20 Kernrohrbohrvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US462447A US3874466A (en) 1974-04-19 1974-04-19 Core tube placement and retrieval

Publications (1)

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US3874466A true US3874466A (en) 1975-04-01

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ID=23836439

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Application Number Title Priority Date Filing Date
US462447A Expired - Lifetime US3874466A (en) 1974-04-19 1974-04-19 Core tube placement and retrieval

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US (1) US3874466A (sv)
JP (1) JPS534041B2 (sv)
CA (1) CA1012530A (sv)
DE (1) DE2507220A1 (sv)
GB (1) GB1475632A (sv)
SE (1) SE412430B (sv)
ZA (1) ZA75243B (sv)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
US6089335A (en) * 1998-12-16 2000-07-18 Boart Longyear International Holdings, Inc. Positive latch core barrel apparatus
WO2000055473A1 (fr) * 1999-03-15 2000-09-21 Halliburton Energy Services, Inc. Carottier
US6425449B1 (en) 2001-02-08 2002-07-30 Boart Longyear International Holdings, Inc. Up-hole pump-in core barrel apparatus
US20070068677A1 (en) * 2005-08-02 2007-03-29 Tesco Corporation Casing bottom hole assembly retrieval process
CN102042015A (zh) * 2009-10-26 2011-05-04 淮南矿业(集团)有限责任公司 煤样采集装置及方法
US9151129B2 (en) 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1036905A1 (ru) * 1981-01-28 1983-08-23 Производственное геологическое объединение центральных районов "Центргеология" Устройство дл изол ции зон осложнений в скважинах,спускаемое на трубах
CN112814601B (zh) * 2021-03-12 2024-04-12 湖南科技大学 适用于海底钻机绳索取心钻具的挂钩式快捷拆装内管总成
CN112943134A (zh) * 2021-04-09 2021-06-11 湖南科技大学 一种适用于水平地质取心钻机的长距离取心钻进工艺

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US473910A (en) * 1892-05-03 Art of rock-core drilling
US2145170A (en) * 1936-01-30 1939-01-24 Harry Pennington Core barrel for oil well apparatus
US2220554A (en) * 1936-02-08 1940-11-05 Shell Dev Device for recovering cores from boreholes
US3120283A (en) * 1959-07-24 1964-02-04 Longyear E J Co Underground wire line core barrel apparatus
US3333647A (en) * 1964-11-27 1967-08-01 Longyear E J Co Wire line core barrel
US3340939A (en) * 1965-08-27 1967-09-12 Longyear E J Co Core lifter apparatus
US3543870A (en) * 1969-03-18 1970-12-01 Boyles Bros Drilling Co Core barrel retrieval
US3667558A (en) * 1969-04-24 1972-06-06 Honore Joseph Lambot Cable-type coring apparatus for retrieving underground specimens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US473910A (en) * 1892-05-03 Art of rock-core drilling
US2145170A (en) * 1936-01-30 1939-01-24 Harry Pennington Core barrel for oil well apparatus
US2220554A (en) * 1936-02-08 1940-11-05 Shell Dev Device for recovering cores from boreholes
US3120283A (en) * 1959-07-24 1964-02-04 Longyear E J Co Underground wire line core barrel apparatus
US3333647A (en) * 1964-11-27 1967-08-01 Longyear E J Co Wire line core barrel
US3340939A (en) * 1965-08-27 1967-09-12 Longyear E J Co Core lifter apparatus
US3543870A (en) * 1969-03-18 1970-12-01 Boyles Bros Drilling Co Core barrel retrieval
US3667558A (en) * 1969-04-24 1972-06-06 Honore Joseph Lambot Cable-type coring apparatus for retrieving underground specimens

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
US6089335A (en) * 1998-12-16 2000-07-18 Boart Longyear International Holdings, Inc. Positive latch core barrel apparatus
WO2000055473A1 (fr) * 1999-03-15 2000-09-21 Halliburton Energy Services, Inc. Carottier
BE1012557A3 (fr) * 1999-03-15 2000-12-05 Security Dbs Carottier.
US6644424B1 (en) 1999-03-15 2003-11-11 Halliburton Energy Services, Inc. Core barrel
US6425449B1 (en) 2001-02-08 2002-07-30 Boart Longyear International Holdings, Inc. Up-hole pump-in core barrel apparatus
US20070068677A1 (en) * 2005-08-02 2007-03-29 Tesco Corporation Casing bottom hole assembly retrieval process
US7637330B2 (en) 2005-08-02 2009-12-29 Tesco Corporation Casing bottom hole assembly retrieval process
CN102042015A (zh) * 2009-10-26 2011-05-04 淮南矿业(集团)有限责任公司 煤样采集装置及方法
US9151129B2 (en) 2011-08-01 2015-10-06 Groupe Fordia Inc. Core barrel assembly including a valve

Also Published As

Publication number Publication date
ZA75243B (en) 1976-01-28
GB1475632A (en) 1977-06-01
SE412430B (sv) 1980-03-03
CA1012530A (en) 1977-06-21
JPS534041B2 (sv) 1978-02-14
SE7500174L (sv) 1975-10-20
DE2507220A1 (de) 1975-10-30
JPS50137302A (sv) 1975-10-31

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