US3643737A - Slip assembly for a well tool - Google Patents

Slip assembly for a well tool Download PDF

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Publication number
US3643737A
US3643737A US93102A US3643737DA US3643737A US 3643737 A US3643737 A US 3643737A US 93102 A US93102 A US 93102A US 3643737D A US3643737D A US 3643737DA US 3643737 A US3643737 A US 3643737A
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US
United States
Prior art keywords
slips
mandrel
slip
cone
sleeve
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
US93102A
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English (en)
Inventor
James H Current
Marion D Kilgore
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Camco Inc
Original Assignee
Camco Inc
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Filing date
Publication date
Application filed by Camco Inc filed Critical Camco Inc
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Publication of US3643737A publication Critical patent/US3643737A/en
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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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
    • E21B33/1291—Packers; Plugs with mechanical slips for hooking into the casing anchor set by wedge or cam in combination with frictional effect, using so-called drag-blocks
    • E21B33/1292—Packers; Plugs with mechanical slips for hooking into the casing anchor set by wedge or cam in combination with frictional effect, using so-called drag-blocks with means for anchoring against downward and upward movement

Definitions

  • ABSTRACT An improved slip assembly for a well tool having a mandrel wherein unitary slips are positively held to an upper and lower cone by integral dovetail coacting engaging surfaces with a centering sleeve engaging each slip for maintaining the longitudinal movement of all slips in unison as they are moved outwardly and inwardly with the centering sleeve including an opening for each slip whereby the slip may be connected to the cones by inserting the slips from the interior of the sleeve openings thereby allowing improved slip construction.
  • a tubing anchor utilizing said slip assembly and having a mandrel with the upper cone threadably engaged to the mandrel and a lower cone mounted for rotation on the mandrel but longitudinally secured thereto by shear pins and a bow spring connected to the upper cone for actuating the movement of the slips.
  • Another feature of the present invention is the use of the improved slip assembly of the present invention in a tubing anchor.
  • Tubing anchors for anchoring the lower end of tubing in a well bore such as shown in US. Pat. Nos. 2,715,442 and 2,825,410 are old.
  • the improved slip assembly of the present invention as used in a tubing anchor provides an improved tubing anchor which is particularly rugged and dependable and wherein the parts are positively actuated ineither setting or retracting operations and which can be released safely in an emergency.
  • One feature of the present invention is the provision of an improved slip assembly for a well tool having a mandrel by providing a plurality of unitary slips and wedge-shaped slips supporting means surrounding the mandrel and positioned at each end of the slips whereby when the supporting means are moved relative to each other the slips are expanded outwardly and dovetail shaped coacting engaging surfaces are provided on each end of the slips and on the supporting means at the end of the slips which are integrally made with the supporting means and the slips for strength and dependability.
  • a centering sleeve is provided slidably at all times to and surrounding the mandrel with engaging means on the sleeve and each slip for maintaining the longitudinal movement of all of the slips in unison as they are moved outwardly and inwardly.
  • the centering sleeve includes an opening for each slip whereby the slips may be assembled to the supporting means by inserting the slips through the sleeve openings while the mandrel is withdrawn to engage the dovetail shaped coacting engaging surfaces.
  • Another feature of the present invention is providing a slip assembly in which the parts are locked together and cannot be taken apart without first removing the mandrel whereby the assembly will not accidentally come apart in a well.
  • Still another feature of the present invention is the provision of a tubing anchor utilizing the slip assembly of the present invention wherein the tubing anchor includes an upper cone threadably engaged to the mandrel with a lower cone mounted for rotation on the mandrel but longitudinally secured thereto with friction means connected to the upper cone for actuation of the slip assembly with means between the upper cone and the mandrel for limiting upward movement of the cone relative to the mandrel.
  • tubing anchor of the lower cone being longitudinally secured to the mandrel by shear means to provide a safe emergency release.
  • FIG. 1A is an elevational view, partly in cross section, showing the top half of a tubing anchor utilizing the improved slip assembly of the present invention
  • FIG. 1B is a continuation of FIG. 1A
  • FIG. 2 is an elevational view of the centering sleeve of the slip assembly showing a slip in dotted outline positioned therein,
  • FIG. 3 is a cross-sectional view taken along the line 33 omitting the slips
  • FIG. 4 is a cross-sectional view taken along the line 33 of FIG. 2, but showing the slips positioned in the centering sleeve,
  • FIG. 5 is a perspective view of a slip used in the slip assembly of the present invention.
  • FIG. 6 is an elevational view in cross section showing the method of assembly of the slips to the cones.
  • FIG. 7 is an exploded elevational view in cross section showing the method of inserting the mandrel into the assembly.
  • slip assembly of the present invention may be used in various types of well tools, it will be described by way of example only, in use in an improved tubing anchor which is also a feature of the present invention.
  • the tubing anchor of the present invention is generally indicated by the reference numeral 10 and generally includes a tubular mandrel l2 and a slip assembly generally indicated by the reference numeral 14.
  • the upper end of the mandrel I2 is adapted to be connected to a well tubing 16 such as by threads.
  • the slip assembly 14 includes an upper wedge-shaped slip supporting means such as an upper cone l8 and a lower wedge-shaped slip supporting means such as lower cone 20. Integral dovetail shaped coacting engaging surfaces 22 and 24 are provided on the upper cone l8 and the lower cone 20,
  • the upper cone 18 is threadably engaged to the mandrel 12 by thread 32 and frictional means such as bow springs 35 are connected to the upper cone 18 and adapted to engage a well casing (not shown) to provide rotational movement between the upper cone I8 and the mandrel 12 as the mandrel is rotated thereby longitudinally moving the upper cone l8 relative to the mandrel 12.
  • a sea] 33 is provided between the upper cone l8 and the mandrel 12 above the threads 32 to prevent filth and debris from settling on the threads 32 and assures that the slip assembly 14 may be retracted when desired.
  • the lower cone 20 is attached to the mandrel 12 such as to allow relative rotation between the lower cone 20 and the mandrel 12 but prevent normal relative axial movement between the lower cone 20 and mandrel 12 for actuation of the slips 30 as the upper cone 20 is moved.
  • the lower cone 20 may be attached to the mandrel 12 by one or more shear means such as shear pins 34 positioned in an annular groove 36 in the mandrel I2.
  • the shear pins 34 also act to provide the additional function of an emergency release.
  • a centering sleeve 40 is provided which is slidably positioned on and surrounding the mandrel l2.
  • Engaging means are provided on the sleeve 40 and each slip such as ears 42 on the sleeve 40 which coact with slots 44 on the sides of the slip 30.
  • the ears 42 and slots 44 thus allow the slips 30 to move outwardly and inwardly relative to the centering sleeve 40 but maintains the longitudinal movements of all of the slips 30 in unison as they are moved thereby preventing the dovetail coacting surfaces between the cones I8 and 20 and the slips 30 from binding and stopping actuation of the slip assembly 14.
  • the centering sleeve 40 includes an opening 46 between adjacent ears 42 to allow the slips 30 to be inserted from the inside of the centering sleeve 40 outwardly into place in the centering sleeve 40 with the ears 42 engaging the slots 44 on the slips 30 and the coacting dovetail surfaces 26 and 28 on the slips 30 would then engage the coacting dovetail shaped coacting engaging surfaces 22 and 24, respectively, on the upper and lower cones l8 and 20, respectively.
  • the dovetail engaging surfaces 22 and 24 on the cones l8 and 20 can be made integrally with the cones l8 and 20 and thereby provide a much stronger slip assembly 14.
  • the method of assembly of the slip assembly is best seen in FIGS. 6 and 7.
  • the slips 30 are first placed in the openings 46 between adjacent cars 42 of the centering sleeve 40 (FIG. 4).
  • the upper cone l8 and the lower cone 20 are placed at the ends of the centering sleeve 40. It is to be noted from FIG. 6 that the mandrel 12 is not in place in the cones l8 and 20 and the centering sleeve 40 thereby allowing the slips 30 to be retracted into the interior of the centering sleeve 40 (FIG. 4) in the space that is normally occupied by the mandrel 12.
  • the dovetail shaped engaging surfaces 22 and 24 on the upper cone 18 and the lower cone 20 will be aligned with and can be engaged with the dovetail engaging surfaces 26 and 28, respectively, on the slips 30.
  • the dovetail engaging surfaces on the cones l8 and 20 have engaged the slips 30, and by moving the cones l8 and 20 toward each other, the slips 30 are moved out of the interior of the centering sleeve 40 and the mandrel 12 can then be inserted into the assembly and the thread 32 engages the upper cone 18. With the mandrel 12 in position, the slips can only be retracted until their backs rest on the exterior of the mandrel. And the cones l8 and 20 cannot be moved together sufficiently to allow the slips 30 to become disengaged therefrom in the extreme slip expanded position.
  • the slips 30 cannot become disengaged from the cones 18 and 20 regardless of whether they are moved to the extreme expanded or extreme retracted positions.
  • the assembly 14 is disassembled by reversing the procedure. It is to be particularly noted that with the mandrel in position, all of the parts are positively locked together and cannot come apart. These parts, the upper cone l8, centering sleeve 40, all slips 30, lower cone 20 and mandrel 12, are fitted together in the interlocking fashion and are not held together by any removable means such as screws, or bolts and have the advantage that the tool will not come apart in a well hole accidentally.
  • a locking ring 52 is provided connected to the mandrel 12 and adjacent the upper cone 18.
  • a pair of parallel pins 54 and 56 are provided, one being connected to the upper cone 18 and the other being connected to the locking ring 52 to prevent the cone 18 from rotationally unthreading and binding the threaded connection 32.
  • the lead of the thread 32 is such that on one revolution of the cone 18 relative to the mandrel I2, the pins 54 and 56 will clear each other thereby allowing the cone I8 to be rotated in a direction to set the slips 30.
  • the tubing anchor 10 is threadably attached to the tubing string I6 and run to the desired depth in a well.
  • Left hand rotation of the tubing string causes the upper cone [8 and SIIPS 30 to move downwardly against the lower cone cones l8 and 20 being urged toward each other by the torque stored in the mandrel 12.
  • the anchor 10 can be released by torquing the tubing 16 to the right and screwing the upper cone 18 away from the lower cone 20 thereby positively retracting the slips 30 by the dovetail connections between the slips 30 and the cones 18 and 20.
  • the present invention is well adapted to carry out the objects and attain the ends and advantages mentioned as well as others inherent therein.
  • a slip assembly for a well tool having a mandrel comprismg,
  • wedgeshaped slip supporting means surrounding the mandrel and positioned at each end of the slips whereby when the supporting means are moved relative to each other expand the slips outwardly,
  • centering sleeve including an opening for each slip whereby said slips may be assembled to the supporting means by inserting the slips into the interior of the sleeve for aligning for dovetail engaging surfaces on the slips and on the supporting means.
  • a tubing anchor comprising,
  • tubular mandrel the upper end of which is adapted to be connected to a well tubing
  • said centering sleeve including an opening for each slip whereby said slips may be assembled to the cones by inserting the slips from the interior of the sleeve through the sleeve openings before the mandrel is inserted in the sleeve.

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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)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
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US93102A 1970-11-27 1970-11-27 Slip assembly for a well tool Expired - Lifetime US3643737A (en)

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US9310270A 1970-11-27 1970-11-27

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189001A (en) * 1978-07-27 1980-02-19 Dresser Industries, Inc. Friction spring and slip retainer for a mechanical setting tubing anchor
US4411314A (en) * 1981-07-27 1983-10-25 Sooner Oil Tools, Inc. Attachment means for use for insertion and retrieval of a casing packer
US4545431A (en) * 1984-05-23 1985-10-08 Halliburton Company Wireline set/tubing retrieve packer type bridge plug
US4548264A (en) * 1984-04-10 1985-10-22 Hughes Tool Company High temperature well packer
US4637469A (en) * 1984-08-06 1987-01-20 Dresser Industries, Inc. Apparatus and method of well preparation for chemical treatment of produced fluids
US4693309A (en) * 1985-06-27 1987-09-15 Halliburton Company Wireline set/tubing retrievable bridge plug
US4702313A (en) * 1985-05-28 1987-10-27 Dresser Industries, Inc. Slip and slip assembly for well tools
US4750559A (en) * 1985-05-28 1988-06-14 Dresser Industries, Inc. Retrievable anchor assembly
US4811785A (en) * 1987-07-31 1989-03-14 Halbrite Well Services Co. Ltd. No-turn tool
US4901793A (en) * 1987-07-31 1990-02-20 Weber James L No-turn tool for a pumping system
US5139090A (en) * 1991-04-08 1992-08-18 Land John L Tubing rotator with downhole tubing swivel
WO1993024727A1 (en) * 1992-05-28 1993-12-09 John Larry Land Tubing anchor catcher with rotating mandrel
US5314014A (en) * 1992-05-04 1994-05-24 Dowell Schlumberger Incorporated Packer and valve assembly for temporary abandonment of wells
US5429188A (en) * 1993-12-29 1995-07-04 Jorvik Machine Tool & Welding Inc. Tubing rotator for a well
US5429192A (en) * 1992-03-26 1995-07-04 Schlumberger Technology Corporation Method and apparatus for anchoring a perforating gun to a casing in a wellbore including a primary and a secondary anchor release mechanism
US5431230A (en) * 1991-04-08 1995-07-11 Rotating Production Systems, Inc. Slant wellbore tubing anchor catcher with rotating mandrel
US20120012305A1 (en) * 2010-07-15 2012-01-19 Yokley John M Downhole C-Ring Slip Assembly
US20150090441A1 (en) * 2012-04-27 2015-04-02 Altus Intervention As Anchor mechanism for use in a well
CN108019176A (zh) * 2016-11-02 2018-05-11 德州隆科石油装备有限公司 一种注水泥器打捞器
US10184313B2 (en) * 2015-04-06 2019-01-22 Schlumberger Technology Corporation Packer assembly with wing projection slips
CN109403859A (zh) * 2018-12-04 2019-03-01 湖北三峡职业技术学院 野外便携式钻进系统
CN110206500A (zh) * 2019-04-29 2019-09-06 江苏如东联丰石油机械有限公司 一种新型气动双油管卡盘

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633201A (en) * 1948-06-07 1953-03-31 Halliburton Oil Well Cementing Cementing device
US2825410A (en) * 1951-06-11 1958-03-04 Cicero C Brown Well packers
US3058526A (en) * 1960-04-07 1962-10-16 Halliburton Co Tubing anchor
US3180419A (en) * 1962-06-27 1965-04-27 Cicero C Brown Hydrostatic pressure set well packer
US3279542A (en) * 1964-02-17 1966-10-18 Cicero C Brown Anchoring means assembly
US3361209A (en) * 1966-02-23 1968-01-02 Brown Oil Tools Well packer
US3456723A (en) * 1967-06-30 1969-07-22 Camco Inc Hydraulically set well packer
US3467184A (en) * 1967-05-22 1969-09-16 Otis Eng Corp Well packer with resettable anchor and packer means

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633201A (en) * 1948-06-07 1953-03-31 Halliburton Oil Well Cementing Cementing device
US2825410A (en) * 1951-06-11 1958-03-04 Cicero C Brown Well packers
US3058526A (en) * 1960-04-07 1962-10-16 Halliburton Co Tubing anchor
US3180419A (en) * 1962-06-27 1965-04-27 Cicero C Brown Hydrostatic pressure set well packer
US3279542A (en) * 1964-02-17 1966-10-18 Cicero C Brown Anchoring means assembly
US3361209A (en) * 1966-02-23 1968-01-02 Brown Oil Tools Well packer
US3467184A (en) * 1967-05-22 1969-09-16 Otis Eng Corp Well packer with resettable anchor and packer means
US3456723A (en) * 1967-06-30 1969-07-22 Camco Inc Hydraulically set well packer

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189001A (en) * 1978-07-27 1980-02-19 Dresser Industries, Inc. Friction spring and slip retainer for a mechanical setting tubing anchor
US4411314A (en) * 1981-07-27 1983-10-25 Sooner Oil Tools, Inc. Attachment means for use for insertion and retrieval of a casing packer
US4548264A (en) * 1984-04-10 1985-10-22 Hughes Tool Company High temperature well packer
US4545431A (en) * 1984-05-23 1985-10-08 Halliburton Company Wireline set/tubing retrieve packer type bridge plug
US4637469A (en) * 1984-08-06 1987-01-20 Dresser Industries, Inc. Apparatus and method of well preparation for chemical treatment of produced fluids
US4702313A (en) * 1985-05-28 1987-10-27 Dresser Industries, Inc. Slip and slip assembly for well tools
US4750559A (en) * 1985-05-28 1988-06-14 Dresser Industries, Inc. Retrievable anchor assembly
US4693309A (en) * 1985-06-27 1987-09-15 Halliburton Company Wireline set/tubing retrievable bridge plug
US4811785A (en) * 1987-07-31 1989-03-14 Halbrite Well Services Co. Ltd. No-turn tool
US4901793A (en) * 1987-07-31 1990-02-20 Weber James L No-turn tool for a pumping system
US5139090A (en) * 1991-04-08 1992-08-18 Land John L Tubing rotator with downhole tubing swivel
US5431230A (en) * 1991-04-08 1995-07-11 Rotating Production Systems, Inc. Slant wellbore tubing anchor catcher with rotating mandrel
US5327975A (en) * 1991-04-08 1994-07-12 Rotating Production Systems, Inc. Tubing anchor catcher with rotating mandrel
US5429192A (en) * 1992-03-26 1995-07-04 Schlumberger Technology Corporation Method and apparatus for anchoring a perforating gun to a casing in a wellbore including a primary and a secondary anchor release mechanism
US5314014A (en) * 1992-05-04 1994-05-24 Dowell Schlumberger Incorporated Packer and valve assembly for temporary abandonment of wells
WO1993024727A1 (en) * 1992-05-28 1993-12-09 John Larry Land Tubing anchor catcher with rotating mandrel
US5429188A (en) * 1993-12-29 1995-07-04 Jorvik Machine Tool & Welding Inc. Tubing rotator for a well
US20120012305A1 (en) * 2010-07-15 2012-01-19 Yokley John M Downhole C-Ring Slip Assembly
US8511376B2 (en) * 2010-07-15 2013-08-20 Dril-Quip, Inc. Downhole C-ring slip assembly
US20150090441A1 (en) * 2012-04-27 2015-04-02 Altus Intervention As Anchor mechanism for use in a well
US9291029B2 (en) * 2012-04-27 2016-03-22 Altus Intervention As Anchor mechanism for use in a well
US10184313B2 (en) * 2015-04-06 2019-01-22 Schlumberger Technology Corporation Packer assembly with wing projection slips
CN108019176A (zh) * 2016-11-02 2018-05-11 德州隆科石油装备有限公司 一种注水泥器打捞器
CN108019176B (zh) * 2016-11-02 2024-04-26 德州隆科石油装备有限公司 一种注水泥器打捞器
CN109403859A (zh) * 2018-12-04 2019-03-01 湖北三峡职业技术学院 野外便携式钻进系统
CN109403859B (zh) * 2018-12-04 2024-02-09 湖北三峡职业技术学院 野外便携式钻进系统
CN110206500A (zh) * 2019-04-29 2019-09-06 江苏如东联丰石油机械有限公司 一种新型气动双油管卡盘

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Publication number Publication date
GB1305847A (enExample) 1973-02-07

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