US1776776A - Liner setter and puller - Google Patents

Liner setter and puller Download PDF

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US1776776A
US1776776A US347866A US34786629A US1776776A US 1776776 A US1776776 A US 1776776A US 347866 A US347866 A US 347866A US 34786629 A US34786629 A US 34786629A US 1776776 A US1776776 A US 1776776A
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mandrel
shoulder
dog
liner
dogs
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US347866A
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Byron F Blackmarr
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    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53796—Puller or pusher means, contained force multiplying operator
    • Y10T29/53848—Puller or pusher means, contained force multiplying operator having screw operator
    • Y10T29/53857—Central screw, work-engagers around screw
    • Y10T29/53878—Tubular or tube segment forms work-engager
    • Y10T29/53887—Movable grippers on screw

Definitions

  • This invention relates to devices of the type employed, for example, as a lmer setter and adaptor or, as it is frequently termed hook-n and hook-off adaptor, as a safety joint for e fishing tools, or as a bearing puller.
  • Another object is to insure that ⁇ relative rotation between the coupling members, while lowering the casing into or raising it from the well, will not cause the coupling members to become disengaged.
  • Fig. 1 is a longitudinal View, mainly in mid section, of a liner setter and puller constructed in accordance with the provisions of this invention, fragments of a drill pipe or stem and of a liner or string of casing being indicated in broken lines as connected with the coupling.
  • Fig. 2 is a horizontal section on the line indicated by 24-2, Fig. 1.
  • Fig. 3 is a view similar to Fig. 1, with a portion of the mandrel broken away, and with the parts in diii'erent positions than in 5o Fig. 1.
  • Fig. 4 is a horizontal section on the line indicated by 4 4 of Fig. 3.
  • the linervsetter and puller comprises a liner adaptor 6 and a mandrel 7 releasably connected with the adaptor.
  • the adaptor is internally threaded at its lower endat 8 so as to adapt it for screwing' on to the upper end of a member A that is to be pulled, such, for example, as a liner.
  • the upper end of the mandrel 7 is provided with a threaded box 9 so as to adapt it for receiving a threaded pin B on the lower end of a string of drill pipe, indicated at C which is employed in the operation of lowering the liner A into and raising said liner from a well.
  • the mandrel 7 is provided with an axial bore 10 extending ⁇ from end to end thereof so as to enable mud to be circulated through said mandrel,'if that should be adeoI visable or necessary. 7
  • the mandrel is provided with an external annular shoulder 11 and the adaptor is provided with an internal annular approximately horizontal shoulder 12.
  • the distance from the shoulder 12 to the adjacent end of the adaptor is less than the distance from the shoulder l1 to a dogor dogs 13, which are adapted to project from the mandrel beneath the shoulder 12.
  • the dogs 13 are crescent shaped and are pivoted at' their adjacent ends by pins 14 to the mandrel.
  • the dogs 13 are yieldingly held outwardly in their latching positions by a spring 15 which is accommodated in a spring chamber 16 that extends transversally through the mandrel, ⁇ the opposite ends of said spring engaging the inner faces of the dogs 13.
  • the dogs 13 are partly accommodated at all times and are adapted to be wholly retracted within a circumferentially extending groove or recess 17in the mandrel 7, said dogs being loo . in the unlatchingpositions when thus repositioned ⁇ midway of the length of the bore portion 18 and are thus spaced from the shoulder 12 and the lower end of the b ore 18, thus imalngitnecessary, for eiecting retraction of the dogs 13, that the mandreland. adaptor be relatively positioned to bring the dogs midway of the bore portion 18.
  • the projec- ,2o tions 19 terminate downwardly in outwardly and downwardly slanting cam faces 20, which function, when the mandrel is pulled upwardly, to gradually force the dogs 13 inwardly into the recesses 17 in the mandrel, in which 2 5 ⁇ positionthe dogs are unlatched, thereby enabling the dogs to pass the projections 19 so that the mandrel can be withdrawn from the well.
  • the adaptor has an upwardly and outwardly tapered portion 21 which, when the ⁇ 3 0 v mandrel is lowered into the well, functions to force the dogsinwardly so as to pass this projections 19, after which the dogs 13 are ur ed outwardly hy the spring 15 so as to engage eneath theJ shoulder 12.
  • the mandrel is preferably, provided in the recess 17 with oppositely positioned webs 22 which join the end walls of the recess 17 for strengthening purposes, said webs being positioned between the opposing dogs 13.
  • the adaptor be provid- 30 ed with inwardly projecting vertically extending shoulders 23 below thelevel of the cam faces 20.
  • the drill pipe to which the mandrel is secured, will be turned by the driller to -cause the dogs 13 to be in vertical alinement with the cam faces 20, whereuponl the driller will cause the drill pipe to be pulled upwardly, thereby causing the cam faces 2O to force the dogs 13 inwardly so as to'retract said dogs and permit them to pass the projections 19.
  • the driller To hook onto the ⁇ adaptor, the driller will lower the drill pipe with the mandrel at-y tached thereto and upon engagement of the dogs 13 with the tapered face 21, said dogs will be retracted so as to pass the proj ections 19, whereupon said dogs will snap outwardly into position beneath the shoulder 12.
  • the driller now causes the drill pipe to be raised, thus pulling the adaptor out of the well together with the liner A secured to said adaptor.
  • a liner setter and puller comprising a tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted'to enter the bore of the tubular member, a dog movably mounted in the mandrel, a means yieldingly holding the dog outwardly so as to engage said shoulder, and an inward projection in the enlarged bore portion of the tubular member adapted to be brought into engagement with the dog by relative movement between the tubular member and mandrel for retracting said dog.
  • a liner setterrand puller comprising a tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted to enter the borekof the tubular member, a dog movably mounted inthe mandrel and adapted to engage said shoulder when said mandrel is in one position, a means to yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog When the mandrel is moved to bring the dog to mid position in the enlarged bore portion.
  • a liner setter and puller comprising a tubularmember provided with an enlarged bore portion defining a shoulder, a mandrel ⁇ or 6 until the do 13 are itioned at the adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when said mandrel is in one position, a means to 5 yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog when the mandrel is moved to bring the dog to mid position in the enlarged bore portion, the projection terminating in a direction away from the shoulder in an outwardly inclined cam face.
  • a liner setter and puller comprising av tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the o mandrel, a means yieldingly holding the dog outwardly so as to engage said shoulder, and an inward projection in the enlarged bore portion of the tubular lmember adapted to be brought into engagement with the dog by relative longitudinal movement between the tubular member and mandrel for retracting said dog.
  • a liner setter and puller comprising a tubular member provided with an enlarged 9 bore portion defining a shoulder, a mandrel adapted -to enter the vbore, of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when said mandrel is in one position, a means 5 to yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog when the mandrel is moved longitudinally to bring the dog to mid position-in the enlarged bore portion.
  • a liner setter and puller comprising a tubular member provided with an enlarged 5 bore portion defining a shoulder, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when saidmandrel is in one position, a means to 0 yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end minating downwardly in an outwardly and downwardly slanting cam face, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel, and a means yieldingly holding the dog outwardly to engage the shoulder when the mandrel is turned to one position, the cam face engaging the dog when the mandrel is lowered and turned to a different position and then raised.
  • a linersetter and puller comprising a tubular member provided with an internal approximately horizontal shoulder and provided with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terminating downwardly in an outwardly and downwardly slanting cam face, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel, and a means yieldingly holding the dog outwardly to engage the shoulder when the mandrel is turned to one position, the cam face engaging the dog'when the mandrel is lowered andfturned to a different position and then raised, the adaptor being provided with an inwardly projecting vertically eX- tending shoulder engageable by the dog when the mandrel is lowered into a third position and turned in one direction.
  • a liner setter and puller comprising a tubular member provided with an internal. approximately horizontal shoulder and provided with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terminating downwardly in an outwardly and downwardly slanting cani face, a mandrel adapted to enter the bore of the tubular member, a crescentshaped dog pivoted at one end in the mandrel to swing horizontally, and a spring in the mandrel yieldingly thrusting the dog outward so that said dog will engage beneath the shoulder when the mandrel is turned to one position, the cam face engaging the dog when the mandrel is lowered and turned in a different position and then raised.
  • a liner setter and puller comprising a. tubular member provided with an internal approximately horizontal shoulder and prov1( ed with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terlul ian

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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)

Description

Spt. 30, 1930. a. F. BLACKMARR LINER SETTER AND FULLER Filed latch 1929 Patented Sept. 3D, 1930 u UNITED ls'rA'l'lss BYRUN FQBIIAKMARR, OF BAKERSFIELD, CALIFORNIA man snr'rnn AND BULLER .Application med March le, 1929. Serial No. 347,866.
This invention relates to devices of the type employed, for example, as a lmer setter and adaptor or, as it is frequently termed hook-n and hook-off adaptor, as a safety joint for e fishing tools, or as a bearing puller.
- in the art relating to the drilling of oil wells, it is generally necessary to place a smaller string of casing inside of a larger string. For example, this is done in setting a perforated string or liner, as it is termed.
Since it is unnecessary to extend the smaller casing to the top of the well, it is the usual practice to set the liner by lowering the same into position with a strin of drill pipe. A i means must be provided or releasably coupling the drill stem to the liner so that the liner can be lowered into and raised from the well. This invention is well adapted to thus releasably couple a string of casing to the drill stem in the manner mentioned. l
It is an object of the present invention to provide a device of this character of comparatively simple construction and one that is reliable in its operation. A
A very important object 1s to prevent accidental disengagement of the coupling members.
Another object is to insure that` relative rotation between the coupling members, while lowering the casing into or raising it from the well, will not cause the coupling members to become disengaged.
Other objects and advantages will appear in the subjoined detailed description.
The accompanying drawings illustrate the invention:
Fig. 1 is a longitudinal View, mainly in mid section, of a liner setter and puller constructed in accordance with the provisions of this invention, fragments of a drill pipe or stem and of a liner or string of casing being indicated in broken lines as connected with the coupling.
Fig. 2 is a horizontal section on the line indicated by 24-2, Fig. 1.
Fig. 3 is a view similar to Fig. 1, with a portion of the mandrel broken away, and with the parts in diii'erent positions than in 5o Fig. 1.
Fig. 4 is a horizontal section on the line indicated by 4 4 of Fig. 3.
Referring to the drawing, the linervsetter and puller comprisesa liner adaptor 6 and a mandrel 7 releasably connected with the adaptor. The adaptor is internally threaded at its lower endat 8 so as to adapt it for screwing' on to the upper end of a member A that is to be pulled, such, for example, as a liner.
The upper end of the mandrel 7 is provided with a threaded box 9 so as to adapt it for receiving a threaded pin B on the lower end of a string of drill pipe, indicated at C which is employed in the operation of lowering the liner A into and raising said liner from a well. The mandrel 7 is provided with an axial bore 10 extending `from end to end thereof so as to enable mud to be circulated through said mandrel,'if that should be adeoI visable or necessary. 7
The mandrel is provided with an external annular shoulder 11 and the adaptor is provided with an internal annular approximately horizontal shoulder 12. The distance from the shoulder 12 to the adjacent end of the adaptor is less than the distance from the shoulder l1 to a dogor dogs 13, which are adapted to project from the mandrel beneath the shoulder 12. Thus, when the dogs 13 are projected beneath the shoulders 12, relative axial movement within prescribed limits may take place between the adaptor and the mandrel without disengaging the dogs from the mandrel, provided the mandrel and adaptor are not turned to predetermined positions rel ative to each other.
The dogs 13 are crescent shaped and are pivoted at' their adjacent ends by pins 14 to the mandrel. The dogs 13 are yieldingly held outwardly in their latching positions by a spring 15 which is accommodated in a spring chamber 16 that extends transversally through the mandrel,` the opposite ends of said spring engaging the inner faces of the dogs 13.
The dogs 13 are partly accommodated at all times and are adapted to be wholly retracted within a circumferentially extending groove or recess 17in the mandrel 7, said dogs being loo . in the unlatchingpositions when thus repositioned `midway of the length of the bore portion 18 and are thus spaced from the shoulder 12 and the lower end of the b ore 18, thus imalngitnecessary, for eiecting retraction of the dogs 13, that the mandreland. adaptor be relatively positioned to bring the dogs midway of the bore portion 18. The projec- ,2o tions 19 terminate downwardly in outwardly and downwardly slanting cam faces 20, which function, when the mandrel is pulled upwardly, to gradually force the dogs 13 inwardly into the recesses 17 in the mandrel, in which 2 5 `positionthe dogs are unlatched, thereby enabling the dogs to pass the projections 19 so that the mandrel can be withdrawn from the well. The adaptor has an upwardly and outwardly tapered portion 21 which, when the `3 0 v mandrel is lowered into the well, functions to force the dogsinwardly so as to pass this projections 19, after which the dogs 13 are ur ed outwardly hy the spring 15 so as to engage eneath theJ shoulder 12. The mandrel, is preferably, provided in the recess 17 with oppositely positioned webs 22 which join the end walls of the recess 17 for strengthening purposes, said webs being positioned between the opposing dogs 13.
' The oreg'oingwill make clear the construction and operation of the invention and, briefly stated, the operation is as follows:
Assuming, for example, that the parts are in the positions illustrated in Fig. 1 and that the parts are being lowered into the well and assuming that the outer face of the adaptor is engagedby the wall of the hole in its descent, there may be atendency for the adaptor r to be turned by reason of its contact with the 59 wall of the hole. The adaptor will freely turn, without any liability of the dogs 13 being disengaged therefrom. This will be true whether the shoulder .12 be engaged by the dogs 13 or lthe mandrel be forced downwardly in the adaptor until the dogs are positioned beneath the level vof the projections 19, as
would occur, for example, when the liner A strikes the bottom of the well.
l lt is preferable that the adaptor be provid- 30 ed with inwardly projecting vertically extending shoulders 23 below thelevel of the cam faces 20. The advantagey of this construction is that, in the operation of setting the liner, if said liner should stick fast, the
* mandrel will descend in the bore of the adaptlevel of the sh'oul ers 23. he operator will then cause the drill pipe to be rotated, thusquentlycausing the ada tor to turn with the mandrel. It will be'rea ily understood that the liner ma thus be readily rotated in either d1rection,.i itshould tend to stick, without `any liability of accidentally disconnecting the mandrel and adaptor.
, Now, assuming that the liner has been set in position in the well, and that the shoulder l1 1s resting on the end of the adaptor and that it is desired to disengagej the mandrel from the adaptor, the drill pipe, to which the mandrel is secured, will be turned by the driller to -cause the dogs 13 to be in vertical alinement with the cam faces 20, whereuponl the driller will cause the drill pipe to be pulled upwardly, thereby causing the cam faces 2O to force the dogs 13 inwardly so as to'retract said dogs and permit them to pass the projections 19.
To hook onto the` adaptor, the driller will lower the drill pipe with the mandrel at-y tached thereto and upon engagement of the dogs 13 with the tapered face 21, said dogs will be retracted so as to pass the proj ections 19, whereupon said dogs will snap outwardly into position beneath the shoulder 12. The driller now causes the drill pipe to be raised, thus pulling the adaptor out of the well together with the liner A secured to said adaptor.
l claim:
1. A liner setter and puller comprising a tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted'to enter the bore of the tubular member, a dog movably mounted in the mandrel, a means yieldingly holding the dog outwardly so as to engage said shoulder, and an inward projection in the enlarged bore portion of the tubular member adapted to be brought into engagement with the dog by relative movement between the tubular member and mandrel for retracting said dog.
2. A liner setterrand puller comprising a tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted to enter the borekof the tubular member, a dog movably mounted inthe mandrel and adapted to engage said shoulder when said mandrel is in one position, a means to yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog When the mandrel is moved to bring the dog to mid position in the enlarged bore portion.
3. A liner setter and puller comprising a tubularmember provided with an enlarged bore portion defining a shoulder, a mandrel `or 6 until the do 13 are itioned at the adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when said mandrel is in one position, a means to 5 yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog when the mandrel is moved to bring the dog to mid position in the enlarged bore portion, the projection terminating in a direction away from the shoulder in an outwardly inclined cam face.
5. 4. A liner setter and puller comprising av tubular member provided with an enlarged bore portion defining a shoulder, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the o mandrel, a means yieldingly holding the dog outwardly so as to engage said shoulder, and an inward projection in the enlarged bore portion of the tubular lmember adapted to be brought into engagement with the dog by relative longitudinal movement between the tubular member and mandrel for retracting said dog.
5. A liner setter and puller comprising a tubular member provided with an enlarged 9 bore portion defining a shoulder, a mandrel adapted -to enter the vbore, of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when said mandrel is in one position, a means 5 to yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end of the enlarged bore portion and adapted to engage and retract the dog when the mandrel is moved longitudinally to bring the dog to mid position-in the enlarged bore portion.
6. A liner setter and puller comprising a tubular member provided with an enlarged 5 bore portion defining a shoulder, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel and adapted to engage said shoulder when saidmandrel is in one position, a means to 0 yieldingly hold the dog outwardly, and a projection in the enlarged bore portion spaced from the shoulder and from the opposite end minating downwardly in an outwardly and downwardly slanting cam face, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel, and a means yieldingly holding the dog outwardly to engage the shoulder when the mandrel is turned to one position, the cam face engaging the dog when the mandrel is lowered and turned to a different position and then raised.
8. A linersetter and puller comprising a tubular member provided with an internal approximately horizontal shoulder and provided with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terminating downwardly in an outwardly and downwardly slanting cam face, a mandrel adapted to enter the bore of the tubular member, a dog movably mounted in the mandrel, and a means yieldingly holding the dog outwardly to engage the shoulder when the mandrel is turned to one position, the cam face engaging the dog'when the mandrel is lowered andfturned to a different position and then raised, the adaptor being provided with an inwardly projecting vertically eX- tending shoulder engageable by the dog when the mandrel is lowered into a third position and turned in one direction.
9. A liner setter and puller comprising a tubular member provided with an internal. approximately horizontal shoulder and provided with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terminating downwardly in an outwardly and downwardly slanting cani face, a mandrel adapted to enter the bore of the tubular member, a crescentshaped dog pivoted at one end in the mandrel to swing horizontally, and a spring in the mandrel yieldingly thrusting the dog outward so that said dog will engage beneath the shoulder when the mandrel is turned to one position, the cam face engaging the dog when the mandrel is lowered and turned in a different position and then raised.
Signed at Bakersfield, Calif., this 25 day of February 1929. v
, BYRON F. BLACKMARR.
of the enlarged bore portion and adapted t0,\
engage and retract the dog when the mandrel is moved longitudinally to bring the dog` to mid position in the enlarged bore portion, the projection terminating in a direction away from the shoulder in an outwardly inclinedcam face.
o 7. A liner setter and puller comprising a. tubular member provided with an internal approximately horizontal shoulder and prov1( ed with a projection positioned to one side of said shoulder and extending below the level of said shoulder, said projection terlul ian
US347866A 1929-03-18 1929-03-18 Liner setter and puller Expired - Lifetime US1776776A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495649A (en) * 1947-03-13 1950-01-24 Frank C Wilson Device for removing or inserting sleeves
US2566507A (en) * 1947-09-23 1951-09-04 Snap On Tools Corp Cylinder sleeve puller
US2598930A (en) * 1947-12-02 1952-06-03 American Water Works Co Inc Device for removing seals from water wells and other purposes
US2688183A (en) * 1951-01-09 1954-09-07 Int Harvester Co Valve seat puller
US2732616A (en) * 1956-01-31 vegors
US2876533A (en) * 1954-12-24 1959-03-10 Int Harvester Co Valve seat puller
US2952485A (en) * 1956-06-21 1960-09-13 Jerry J Hammond Music stand
US2953407A (en) * 1956-10-05 1960-09-20 Cella Machinery Inc Apparatus for depositing paper containers in crates
US2954138A (en) * 1955-08-16 1960-09-27 Owens Corning Fiberglass Corp Load handling device and method of operation
US3059956A (en) * 1958-01-21 1962-10-23 Geffner Ted Combined shackle and ejector mechanism for stores
US3863976A (en) * 1973-02-12 1975-02-04 Westinghouse Electric Corp Remotely operable explosive plug insertion tool
US3901546A (en) * 1973-05-07 1975-08-26 Rucker Co Casing hanger assembly and operating tools therefor
US4799853A (en) * 1986-10-06 1989-01-24 Xerox Corporation Self-centering end effector
US4813730A (en) * 1987-06-19 1989-03-21 Terral Ben D Retrieval device for a well control tool
US4863672A (en) * 1985-08-16 1989-09-05 Hochtemperatur-Reaktorbau Gmbh Absorber rod
US20130043697A1 (en) * 2009-09-08 2013-02-21 Crushing And Mining Equipment Pty Ltd Mantle lifting device and method for lifting a mantle

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732616A (en) * 1956-01-31 vegors
US2495649A (en) * 1947-03-13 1950-01-24 Frank C Wilson Device for removing or inserting sleeves
US2566507A (en) * 1947-09-23 1951-09-04 Snap On Tools Corp Cylinder sleeve puller
US2598930A (en) * 1947-12-02 1952-06-03 American Water Works Co Inc Device for removing seals from water wells and other purposes
US2688183A (en) * 1951-01-09 1954-09-07 Int Harvester Co Valve seat puller
US2876533A (en) * 1954-12-24 1959-03-10 Int Harvester Co Valve seat puller
US2954138A (en) * 1955-08-16 1960-09-27 Owens Corning Fiberglass Corp Load handling device and method of operation
US2952485A (en) * 1956-06-21 1960-09-13 Jerry J Hammond Music stand
US2953407A (en) * 1956-10-05 1960-09-20 Cella Machinery Inc Apparatus for depositing paper containers in crates
US3059956A (en) * 1958-01-21 1962-10-23 Geffner Ted Combined shackle and ejector mechanism for stores
US3863976A (en) * 1973-02-12 1975-02-04 Westinghouse Electric Corp Remotely operable explosive plug insertion tool
US3901546A (en) * 1973-05-07 1975-08-26 Rucker Co Casing hanger assembly and operating tools therefor
US4863672A (en) * 1985-08-16 1989-09-05 Hochtemperatur-Reaktorbau Gmbh Absorber rod
US4799853A (en) * 1986-10-06 1989-01-24 Xerox Corporation Self-centering end effector
US4813730A (en) * 1987-06-19 1989-03-21 Terral Ben D Retrieval device for a well control tool
US20130043697A1 (en) * 2009-09-08 2013-02-21 Crushing And Mining Equipment Pty Ltd Mantle lifting device and method for lifting a mantle
US8833825B2 (en) * 2009-09-08 2014-09-16 Crushing And Mining Equipment Pty Ltd Mantle lifting device and method for lifting a mantle

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