US3701389A - Wire line core drilling apparatus - Google Patents

Wire line core drilling apparatus Download PDF

Info

Publication number
US3701389A
US3701389A US136804A US3701389DA US3701389A US 3701389 A US3701389 A US 3701389A US 136804 A US136804 A US 136804A US 3701389D A US3701389D A US 3701389DA US 3701389 A US3701389 A US 3701389A
Authority
US
United States
Prior art keywords
drill stem
latch
tube assembly
drilling apparatus
core tube
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
US136804A
Inventor
Gunnar Kristoffer Egnelov
Sune Vilhelm Eriksson
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.)
Craelius AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Application granted granted Critical
Publication of US3701389A publication Critical patent/US3701389A/en
Assigned to CRAELIUS AKTIEBOLAG, reassignment CRAELIUS AKTIEBOLAG, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ATLAS COPCO AB
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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing

Definitions

  • ABSTRACT A wire line core drilling apparatus comprising a tubular drill stem, an annular drill bit mounted at the forward end of the drill stem and an inner core tube assembly, the latter of which is provided with at least one latch dog for being lockable against longitudinal displacement relative to the drill stem and for being connectable to a retrieving device introduced in the drill stem.
  • This invention relates to a wire line core drilling apparatus having a retrievable inner core tube assembly.
  • the main object of the invention is to provide a means for locking the inner core tube assembly relative to the drill stem without causing an undesirable reduction of the inner core tube diameter.
  • FIG. 1a is a longitudinal section through a core drilling apparatus according to the invention and shows the locking means of the inner core tube assembly in its transport position.
  • FIG. lb shows the same apparatus having its inner core tube assembly locked in its core receiving position.
  • FIG. 2 shows the forward end of the drilling apparatus shown in Figs. 1a and lb.
  • FIG. 3 is a longitudinal section through a core drilling apparatus according to another embodiment of the invention being arranged in a core receiving position.
  • FIGS. la, lb and 2 there is shown a wire line core drilling apparatus consisting of a multisectional tubular drill stem 1 which is provided with an annular drill bit 2 at its forward end.
  • the drill stem 1 is adapted for receiving an inner core tube assembly which comprises an inner core tube 3, an intermediate piece 4 and a housing 5.
  • the intermediate piece 4 comprises a swivel which allows the inner core tube to rotate relative to the housing 5.
  • one or preferably two identical latch dogs 6 are pivotably mounted on a stub axle 7. One of these latch dogs are reversed relative to the other.
  • the latch dogs 6 are pivotable between an inner core tube assembly locking position (see FIG. lb) and a transport position (see FIG. la). In the latter position the latch dogs are cooperating with a retrieving device 8 by means of which the inner core tube assembly is manouverable within the drill stem 1.
  • the latch dogs 6 are provided with two arms 9 and 10 which extend backward from the stub axle 7.
  • One of these arms 9 constitutes a locking heel provided for cooperation with a first shoulder 11 at the drill stem inner wall so as to lock the inner core tube assembly against backward displacement.
  • the other arm 10 on each latch dog 6 constitutes a gripping jaw and is provided with a hook 12 at its free end, which gripping jaw is intended to cooperate with a coupling means 13 of a retrieving device 8.
  • This coupling means 13 consists of a rod having a spear at its forward end.
  • the coupling means is connectable to the inner core tube assembly by introduction of the spear between the gripping jaws and by being caught thereof.
  • the retrieving device 8 is provided with an axially shiftable releasing sleeve 14. In order to release the latch dogs 6 from the coupling device 13 the releasing sleeve 14 is shifted towards the spear so as to press apart the arms 10 of the latch dogs 6, making it possible for the coupling means 13 to be withdrawn.
  • the latch dogs 6 are provided with forward extending arms 15 which are arranged to cooperate with a second shoulder 17 on the drill stem inner wall to lock the inner core tube assembly against forward movement relative to the drill stem.
  • the arms 15 are also arranged to be acted upon by aspring 16 for biasing the latch dogs toward an inner core tube assembly locking position.
  • the axial locking of the inner core tube assembly with the drill stem 1 is obtained by cooperation of the latch dogs 6 of the inner core tube and the two shoulders 11 and 17 on the drill stem inner wall.
  • the shoulders are constituted by annular grooves in the drill stem inner wall and do not cause any reduction of the inner core tube diameter.
  • the latch dogs 6 are reversed relative to each other they will cooperate with the shoulders on the drill stern inner wall in diametrically opposite points whereby a symmetric and proper locking is obtained.
  • the inner core tube assembly 3 is introduced in the drill stem 1 by means of the retrieving device 8 and is connected to the latter by means of the latch dogs 6.
  • the inner core tube assembly When the inner core tube assembly has reached its proper drilling and core receiving position it is released from the retrieving device by means of the releasing sleeve 14. Thereupon, the arms 9 and 10 are brought into cooperation with the shoulders 11 and 17 on the drill stern by means of the spring 16. Now, the inner core tube assembly is locked against axial movement and core drilling can be performed.
  • the drilling is interrupted.
  • the retrieving device 8 is re-introduced in the drill stem 1 and is brought into cooperation with the latch dogs 6.
  • the spear presses the gripping jaws of the latch dogs 6 aside so that the arms 9 and 15 are moved inward breaking their cooperation with the shoulders 11 and 17.
  • the gripping jaws catch the spear.
  • the inner core tube assembly has now been released from the drill stem 1 and has simultaneously been interconnected with the retrieving device 8 and may now be withdrawn from the drill stem.
  • the core drilling apparatus shown in FIG. 3 is provided with two latch dogs of a modified type which are identical but reversed mounted relative to each other on a transverse stub axle 107.
  • These latch dogs 106 extend rearward from the stub axle 107 and at their free ends 110 they are provided with gripping jaws 1 10, provided with hooks 112. These gripping jaws are adapted for cooperation with a coupling means 113 of a retrieving device 108.
  • the latch dogs 106 are provided with locking heels 120 which are arranged to cooperate with a first shoulder 111 on the drill stem inner wall to lock the inner core tube assembly against backward movement as the inner core tube is in its core receiving position.
  • the latch dogs are also provided with forward extending arms 115 which are arranged to cooperate with a second shoulder 117 on the drill stem inner wall to lock the inner core tube assembly against forward movement relative to drill stem.
  • the arms 115 are also arranged to be acted upon by a spring 116 for biasing the latch dogs toward the inner core tube assembly locking positions.
  • the coupling means 1 13 of the retrieving device 108 consists of a tubular sleeve provided with an internal annular shoulder at its forward end.
  • the retrieving device 108 is arranged to be connected to the inner core tube assembly by shifting the coupling sleeve 1 l3 forward over the ends of the latch dogs 106 whereby the hooks 112 seize the shoulder of the coupling means 113.
  • the retrieving device is provided with an axially shiftable releasing sleeve 114 which is arranged to be shifted forward toward the annular shoulder so as to press the gripping jaws together and release the latch dogs 106 from the coupling means 1 l 3.
  • the retrieving device 108 can now be withdrawn from the drill stem.
  • a wire line core drilling apparatus comprising:
  • tubular drill stern having a forward facing and a backward facing shoulder on the inner wall thereof;
  • annular drill bit mounted at the forward end of the drill stem
  • connecting means for selectively connecting said inner core tube assembly to a retrieving device and for selectively locking said inner core tube assembly relative to the drill stern
  • said connecting means including at least one latch dog pivotably mounted on a transverse stub axle, said latch dog having a first locking portion for cooperation with said forward facing shoulder on the drill stem inner wall for preventing backward displacement of the inner core tube assembly relative to the drill stem, a second locking portion for cooperation with said backward facing shoulder on the drill stem inner wall for preventing forward displacement of the inner core tube assembly relative to the drill stem, said first and second locking portions being disposed at opposite sides of said stub axle, and a gripping jaw for cooperation with a coupling means on a retrieving device, by means of which the inner core tube assembly is manouverable within the drill stem.
  • a core drilling apparatus including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
  • a core drilling apparatus according to claim 1 wherein said at least one latch dog is biased toward inner dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
  • a core drilling apparatus including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
  • a core drilling apparatus wherein said at least one latch dog has two rearwardly extending arms one of which comprises said first locking portion and the other of which comprises said sr pp sj 6.
  • a core drilling apparatus including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch core tube assembly locking positions, the latch 9am:essa ssstts ssskas as; t drill stem when said retrieving device is brought into cooperation with the gripping jaws.
  • a core drilling apparatus further comprising said retrieving device and wherein said retrieving device coupling means includes a rod having a spear-shaped forward end selectively engagable with said gripping jaw of said at least one latch dog.
  • said retrieving device coupling means further includes an axially shiftable sleeve mounted over said rod for selectively engaging said at least one latch dog to disengage said rod from said at least one latch dog.

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)

Abstract

A wire line core drilling apparatus comprising a tubular drill stem, an annular drill bit mounted at the forward end of the drill stem and an inner core tube assembly, the latter of which is provided with at least one latch dog for being lockable against longitudinal displacement relative to the drill stem and for being connectable to a retrieving device introduced in the drill stem.

Description

United States Patent Egneliiv et al.
[451 Oct. 31, 1972 [54] WIRE LINE CORE DRILLING APPARATUS [72] Inventors: Gunnar Kristofler Egneliiv; Sune Vilhelm Eriluson, both of Sundbyberg, Sweden [73] Assignee: Atlas Copco Aktiebolag, Nacka,
Sweden [22] Filed: April 23, 1971 [21] Appl.No.: 136,804
[30] Foreign Application Priority Data March 30, 1970 Sweden ..6007/70 [52] US. Cl. ..l75/246 [51] Int. Cl. .152: 25/00 [58] Field of Search 175/246, 254, 244, 236, 239
[56] References Cited UNITED STATES PATENTS 1,427,268 8/1922 Dodds ..175/246 1,716,092 6/1929 Smith 175/246 2,020,599 11/1935 Barrett et a1 ..l75/246 X 2,906,341 9/1959 Kellner et a1. ..175/246 X 3,103,981 9/1963 Harper 175/246 X 3,120,283 2/1964 Braun ..l75/246 3,441,098 4/1969 Martinsen ..l75/246 3,461,981 8/1969 Casper et al ..l75/246 3,485,308 12/1969 Martinsen 175/236 X Primary Examiner-David H. Brown Attorney-Bauer & Goodman [5 7] ABSTRACT A wire line core drilling apparatus comprising a tubular drill stem, an annular drill bit mounted at the forward end of the drill stem and an inner core tube assembly, the latter of which is provided with at least one latch dog for being lockable against longitudinal displacement relative to the drill stem and for being connectable to a retrieving device introduced in the drill stem.
8 Claims, 4 Drawing Figures WIRE LINE CORE DRILLING APPARATUS This invention relates to a wire line core drilling apparatus having a retrievable inner core tube assembly.
The main object of the invention is to provide a means for locking the inner core tube assembly relative to the drill stem without causing an undesirable reduction of the inner core tube diameter.
Other objects and advantages of the invention will be apparent from the following detailed description and drawings in which FIG. 1a is a longitudinal section through a core drilling apparatus according to the invention and shows the locking means of the inner core tube assembly in its transport position. FIG. lb shows the same apparatus having its inner core tube assembly locked in its core receiving position. FIG. 2 shows the forward end of the drilling apparatus shown in Figs. 1a and lb. FIG. 3 is a longitudinal section through a core drilling apparatus according to another embodiment of the invention being arranged in a core receiving position.
In FIGS. la, lb and 2 there is shown a wire line core drilling apparatus consisting of a multisectional tubular drill stem 1 which is provided with an annular drill bit 2 at its forward end. The drill stem 1 is adapted for receiving an inner core tube assembly which comprises an inner core tube 3, an intermediate piece 4 and a housing 5. The intermediate piece 4 comprises a swivel which allows the inner core tube to rotate relative to the housing 5. In the housing 5, one or preferably two identical latch dogs 6 are pivotably mounted on a stub axle 7. One of these latch dogs are reversed relative to the other. The latch dogs 6 are pivotable between an inner core tube assembly locking position (see FIG. lb) and a transport position (see FIG. la). In the latter position the latch dogs are cooperating with a retrieving device 8 by means of which the inner core tube assembly is manouverable within the drill stem 1.
For these purposes the latch dogs 6 are provided with two arms 9 and 10 which extend backward from the stub axle 7. One of these arms 9 constitutes a locking heel provided for cooperation with a first shoulder 11 at the drill stem inner wall so as to lock the inner core tube assembly against backward displacement. The other arm 10 on each latch dog 6 constitutes a gripping jaw and is provided with a hook 12 at its free end, which gripping jaw is intended to cooperate with a coupling means 13 of a retrieving device 8. This coupling means 13 consists of a rod having a spear at its forward end. The coupling means is connectable to the inner core tube assembly by introduction of the spear between the gripping jaws and by being caught thereof. Moreover, the retrieving device 8 is provided with an axially shiftable releasing sleeve 14. In order to release the latch dogs 6 from the coupling device 13 the releasing sleeve 14 is shifted towards the spear so as to press apart the arms 10 of the latch dogs 6, making it possible for the coupling means 13 to be withdrawn.
Furthermore, the latch dogs 6 are provided with forward extending arms 15 which are arranged to cooperate with a second shoulder 17 on the drill stem inner wall to lock the inner core tube assembly against forward movement relative to the drill stem. The arms 15 are also arranged to be acted upon by aspring 16 for biasing the latch dogs toward an inner core tube assembly locking position.
Thus, the axial locking of the inner core tube assembly with the drill stem 1 is obtained by cooperation of the latch dogs 6 of the inner core tube and the two shoulders 11 and 17 on the drill stem inner wall. The shoulders are constituted by annular grooves in the drill stem inner wall and do not cause any reduction of the inner core tube diameter. As the latch dogs 6 are reversed relative to each other they will cooperate with the shoulders on the drill stern inner wall in diametrically opposite points whereby a symmetric and proper locking is obtained.
The inner core tube assembly 3 is introduced in the drill stem 1 by means of the retrieving device 8 and is connected to the latter by means of the latch dogs 6. When the inner core tube assembly has reached its proper drilling and core receiving position it is released from the retrieving device by means of the releasing sleeve 14. Thereupon, the arms 9 and 10 are brought into cooperation with the shoulders 11 and 17 on the drill stern by means of the spring 16. Now, the inner core tube assembly is locked against axial movement and core drilling can be performed.
When the inner core tube 3 is filled with a core the drilling is interrupted. The retrieving device 8 is re-introduced in the drill stem 1 and is brought into cooperation with the latch dogs 6. Hereby, the spear presses the gripping jaws of the latch dogs 6 aside so that the arms 9 and 15 are moved inward breaking their cooperation with the shoulders 11 and 17. At further downward movement of the retrieving device 8 the gripping jaws catch the spear. The inner core tube assembly has now been released from the drill stem 1 and has simultaneously been interconnected with the retrieving device 8 and may now be withdrawn from the drill stem.
The core drilling apparatus shown in FIG. 3 is provided with two latch dogs of a modified type which are identical but reversed mounted relative to each other on a transverse stub axle 107. These latch dogs 106 extend rearward from the stub axle 107 and at their free ends 110 they are provided with gripping jaws 1 10, provided with hooks 112. These gripping jaws are adapted for cooperation with a coupling means 113 of a retrieving device 108.
Moreover, the latch dogs 106 are provided with locking heels 120 which are arranged to cooperate with a first shoulder 111 on the drill stem inner wall to lock the inner core tube assembly against backward movement as the inner core tube is in its core receiving position. The latch dogs are also provided with forward extending arms 115 which are arranged to cooperate with a second shoulder 117 on the drill stem inner wall to lock the inner core tube assembly against forward movement relative to drill stem. The arms 115 are also arranged to be acted upon by a spring 116 for biasing the latch dogs toward the inner core tube assembly locking positions.
The coupling means 1 13 of the retrieving device 108 consists of a tubular sleeve provided with an internal annular shoulder at its forward end. The retrieving device 108 is arranged to be connected to the inner core tube assembly by shifting the coupling sleeve 1 l3 forward over the ends of the latch dogs 106 whereby the hooks 112 seize the shoulder of the coupling means 113. Moreover, the retrieving device is provided with an axially shiftable releasing sleeve 114 which is arranged to be shifted forward toward the annular shoulder so as to press the gripping jaws together and release the latch dogs 106 from the coupling means 1 l 3.
The retrieving device 108 can now be withdrawn from the drill stem.
The invention is not limited to the shown and described embodiments but can be freely varied within the scope of the following claims.
What we claim is l. A wire line core drilling apparatus comprising:
a tubular drill stern having a forward facing and a backward facing shoulder on the inner wall thereof;
an annular drill bit mounted at the forward end of the drill stem;
an inner core tube assembly; and
connecting means for selectively connecting said inner core tube assembly to a retrieving device and for selectively locking said inner core tube assembly relative to the drill stern, said connecting means including at least one latch dog pivotably mounted on a transverse stub axle, said latch dog having a first locking portion for cooperation with said forward facing shoulder on the drill stem inner wall for preventing backward displacement of the inner core tube assembly relative to the drill stem, a second locking portion for cooperation with said backward facing shoulder on the drill stem inner wall for preventing forward displacement of the inner core tube assembly relative to the drill stem, said first and second locking portions being disposed at opposite sides of said stub axle, and a gripping jaw for cooperation with a coupling means on a retrieving device, by means of which the inner core tube assembly is manouverable within the drill stem.
2. A core drilling apparatus according to claim 1 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
3. A core drilling apparatus according to claim 1 wherein said at least one latch dog is biased toward inner dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
4. A core drilling apparatus according to claim 3 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
5. A core drilling apparatus according to claim I wherein said at least one latch dog has two rearwardly extending arms one of which comprises said first locking portion and the other of which comprises said sr pp sj 6. A core drilling apparatus according to claim 5 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch core tube assembly locking positions, the latch 9am:essa ssstts ssskas as; t drill stem when said retrieving device is brought into cooperation with the gripping jaws.
7. A core drilling apparatus according to claim 1 further comprising said retrieving device and wherein said retrieving device coupling means includes a rod having a spear-shaped forward end selectively engagable with said gripping jaw of said at least one latch dog.
8. A core drilling apparatus according to claim 7 wherein said retrieving device coupling means further includes an axially shiftable sleeve mounted over said rod for selectively engaging said at least one latch dog to disengage said rod from said at least one latch dog.
* II! i l

Claims (8)

1. A wire line core drilling apparatus comprising: a tubular drill stem having a forward facing and a backward facing shoulder on the inner wall thereof; an annular drill bit mounted at the forward end of the drill stem; an inner core tube assembly; and connecting means for selectively connecting said inner core tube assembly to a retrieving device and for selectively locking said inner core tube assembly relative to the drill stem, said connecting means including at least one latch dog pivotably mounted on a transverse stub axle, said latch dog having a first locking portion for cooperation with said forward facing shoulder on the drill stem inner wall for preventing backward displacement of the inner core tube assembly relative to the drill stem, a second locking portion for cooperation with said backward facing shoulder on the drill stem inner wall for preventing forward displacement of the inner core tube assembly relative to the drill stem, said first and second locking portions being disposed at opposite sides of said stub axle, and a gripping jaw for cooperation with a coupling means on a retrieving device, by means of which the inner core tube assembly is manouverable within the drill stem.
2. A core drilling apparatus according to claim 1 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
3. A core drilling apparatus according to claim 1 wherein said at least one latch dog is biased toward inner dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
4. A core drilling apparatus according to claim 3 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch dogs being arranged so as to cooperate with the shoulders of the drill stem at diametrically opposite points.
5. A core drilling apparatus according to claim 1 wherein said at least one latch dog has two rearwardly extending arms one of which comprises said first locking portion and the other of which comprises said gripping jaw.
6. A core drilling apparatus according to claim 5 including two latch dogs which are identical but reversed mounted relative to each other on the stub axle, said latch core tube assembly locking positions, the latch dog being pivoted about said stub axle such that the inner core tube assembly is unlocked relative to the drill stem when said retrieving device is brought into cooperation with the gripping jaws.
7. A core drilling apparatus according to claim 1 further comprising said retrieving device and wherein said retrieving device coupling means includes a rod having a spear-shaped forward end selectively engagable with said gripping jaw of said at least one latch dog.
8. A core drilling apparatus according to claim 7 wherein said retrieving device coupling means further includes an axially shiftable sleeve mounted over said rod for selectively engaging said at least one latch dog to disengage said rod from said at least one latch dog.
US136804A 1970-04-30 1971-04-23 Wire line core drilling apparatus Expired - Lifetime US3701389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE06007/70A SE332402B (en) 1970-04-30 1970-04-30

Publications (1)

Publication Number Publication Date
US3701389A true US3701389A (en) 1972-10-31

Family

ID=20267711

Family Applications (1)

Application Number Title Priority Date Filing Date
US136804A Expired - Lifetime US3701389A (en) 1970-04-30 1971-04-23 Wire line core drilling apparatus

Country Status (9)

Country Link
US (1) US3701389A (en)
JP (1) JPS5133041B1 (en)
BE (1) BE766524A (en)
CA (1) CA948621A (en)
FR (1) FR2090945A5 (en)
GB (1) GB1275537A (en)
IE (1) IE35286B1 (en)
NL (1) NL7105900A (en)
SE (1) SE332402B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874464A (en) * 1972-08-23 1975-04-01 Tigre Tierra Processing of drilling an earth formation
US4431225A (en) * 1980-10-08 1984-02-14 Craelius Ab Releasing device in core barrel grapplers
US4466497A (en) * 1982-03-19 1984-08-21 Soinski Alexander F Wireline core barrel
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
DE3918132A1 (en) * 1988-06-08 1989-12-14 Diamant Boart Craelius Ab Device for securing a tool inside a pipe sunk in the ground
US6820703B1 (en) * 1999-08-24 2004-11-23 Atlas Copco Craelius Ab Locking device for a wire line core drilling system and a method for core drilling
EP2156010A4 (en) * 2007-05-11 2015-05-06 Williamson Deep Ocean Engineering Inc Remotely operated water bottom based drilling system using cable for auxiliary operations
US20160208581A1 (en) * 2014-05-18 2016-07-21 Thru Tubing Solutions, Inc. Sleeve shifting tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2053719C (en) * 1991-10-18 1996-12-10 Irvin Joseph Laporte (Bud) Drilling apparatus, particularly wire line core drilling apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874464A (en) * 1972-08-23 1975-04-01 Tigre Tierra Processing of drilling an earth formation
US4431225A (en) * 1980-10-08 1984-02-14 Craelius Ab Releasing device in core barrel grapplers
US4466497A (en) * 1982-03-19 1984-08-21 Soinski Alexander F Wireline core barrel
US4834198A (en) * 1988-04-25 1989-05-30 Longyear Company Positive latch wire line core barrel apparatus
DE3918132A1 (en) * 1988-06-08 1989-12-14 Diamant Boart Craelius Ab Device for securing a tool inside a pipe sunk in the ground
US6820703B1 (en) * 1999-08-24 2004-11-23 Atlas Copco Craelius Ab Locking device for a wire line core drilling system and a method for core drilling
EP1212512B1 (en) * 1999-08-24 2008-01-16 Atlas Copco Craelius Ab A locking device for a wire line core drilling system, a wire line system including said device and a method for core drilling
EP2156010A4 (en) * 2007-05-11 2015-05-06 Williamson Deep Ocean Engineering Inc Remotely operated water bottom based drilling system using cable for auxiliary operations
US20160208581A1 (en) * 2014-05-18 2016-07-21 Thru Tubing Solutions, Inc. Sleeve shifting tool
US10648290B2 (en) * 2014-05-18 2020-05-12 Thru Tubing Solutions, Inc. Sleeve shifting tool

Also Published As

Publication number Publication date
SE332402B (en) 1971-02-08
IE35286B1 (en) 1976-01-07
FR2090945A5 (en) 1972-01-14
DE2120714A1 (en) 1971-12-02
BE766524A (en) 1971-09-16
JPS5133041B1 (en) 1976-09-17
CA948621A (en) 1974-06-04
NL7105900A (en) 1971-11-02
GB1275537A (en) 1972-05-24
IE35286L (en) 1971-10-30

Similar Documents

Publication Publication Date Title
US3701389A (en) Wire line core drilling apparatus
JPS6067276A (en) Telescopic shaft
CA2082439A1 (en) Overcenter toggle latch apparatus
AU738385B3 (en) Lockable overshot
US1643855A (en) Socket wrench
US4194579A (en) Drilling apparatus and method
US2631862A (en) Trailer hitch and support
US2067009A (en) Tubing and sucker rod fishing socket
US2976943A (en) Device for use in uncoupling drill steels
US3245383A (en) Chute gate
US3627067A (en) Core-drilling system
US3231318A (en) Drill steel centralizers
US2692648A (en) Well tubing anchor
US2646703A (en) Inserting tool for snap ties
US3537743A (en) Core drilling system
US2614881A (en) Well fishing tool
US3441098A (en) Core drilling system
US1972147A (en) Roof hook
US1772437A (en) Fishing tool
US2562298A (en) Safety joint for use in well strings
US1752656A (en) Fishing tool
US2567059A (en) Extensible fishing net
US1081427A (en) Combination slip-socket.
CA1086296A (en) Drilling apparatus
GB1391209A (en) Apparatus for positioning and retrieving a core barrel

Legal Events

Date Code Title Description
AS Assignment

Owner name: CRAELIUS AKTIEBOLAG, SUNDBYBERG, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ATLAS COPCO AB;REEL/FRAME:003838/0265

Effective date: 19810212