US3893717A - Well casing hanger assembly - Google Patents

Well casing hanger assembly Download PDF

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Publication number
US3893717A
US3893717A US465028A US46502874A US3893717A US 3893717 A US3893717 A US 3893717A US 465028 A US465028 A US 465028A US 46502874 A US46502874 A US 46502874A US 3893717 A US3893717 A US 3893717A
Authority
US
United States
Prior art keywords
locking
locking means
recess
shoulder
notch
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
US465028A
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English (en)
Inventor
Norman A Nelson
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.)
Rucker Co
Original Assignee
Putch Samuel W
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 Putch Samuel W filed Critical Putch Samuel W
Priority to US465028A priority Critical patent/US3893717A/en
Priority to FR7509583A priority patent/FR2271379B1/fr
Priority to GB12826/75A priority patent/GB1491378A/en
Priority to CA224,810A priority patent/CA1011650A/en
Priority to BR2998/75A priority patent/BR7502354A/pt
Priority to DE19752560563 priority patent/DE2560563C2/de
Priority to DE2520237A priority patent/DE2520237C2/de
Priority to NO751702A priority patent/NO146476C/no
Priority to NL7505634A priority patent/NL7505634A/xx
Priority to AU81149/75A priority patent/AU493420B2/en
Priority to JP50057887A priority patent/JPS5750237B2/ja
Application granted granted Critical
Publication of US3893717A publication Critical patent/US3893717A/en
Assigned to STEWART & STEVENSON OILTOOLS, INC., A CORP. OF TX. reassignment STEWART & STEVENSON OILTOOLS, INC., A CORP. OF TX. LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: NELSON, NORMAN A., PUTCH, SAMUEL W.
Assigned to RUCKER COMPANY, THE A CORP. OF CA. reassignment RUCKER COMPANY, THE A CORP. OF CA. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: STEWART & STEVENSON OILTOOLS, INC. A CORP. OF TX.
Anticipated expiration legal-status Critical
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
    • 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
    • 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

  • Shear- UNITED STATES PATENTS able holding means are provided for initially preventing the locking means from moving axially on the first 52: g: member until the locking means expands and engages Primary Examiner-Werner l-l.
  • the shearable holding means may be positioned at the top, the bottom or intermediate the ends of the locking means.
  • WELL CASING HANGER ASSEMBLY BACKGROUND OF THE INVENTION It is generally old, as shown in US. Pat. No. 3,420,308 to support an inner casing in a well from an outer casing by means of a resilient expandable and contractible locking element.
  • the present device is directed to various improvements in an assembly for connecting first and second tubular members together by means of a resilient expandable and contractible locking element which holds the locking element in an aligned position, guides the element to an expanded position, and provides shearable means which permits the locking element to move to a locked position and thereafter securely holds and locks the locking element without allowing the element to become misaligned or cocked out of position during the setting operation.
  • the present invention is directed to a well hanger assembly for connecting first and second tubular members, such as casings together, which includes a resiliently expandable and contractible locking element radially and axially movable on the first member for engagement with the second member and locking shoulders between the first member and locking element positioned for aligning and guiding the locking element from a contracted non-engaging position into an expanded engaging position.
  • Yet a still further object of the present invention is the provision of first and second locking shoulders positioned in a recess on the first member and extending outwardly from the recess approximately the same distance and in which a receiving notch is provided in the locking means initially coacting with one of the locking shoulders for guiding the expanding and contracting movement of the locking means whereby when the one locking shoulder is moved out of the notch and the locking notch is moved axially, the locking shoulders act against upper and lower portions of the locking means for positively securing the first and second members together.
  • Still a further object of the present invention is the provision of providing shearable holding means for initially preventing axial movement of the locking means with respect to the first member until the locking means expands and engages the second members.
  • the shearable means may be positioned above, below or intermediate the ends of the locking element.
  • FIG. 1 is a perspective view of one type of resiliently expandable and contractible locking means, here shown as a plurality of spring-loaded dogs,
  • FIG. 2 is another type of resiliently expandable and contractible locking element, here shown as a split biased locking ring,
  • FIG. 3 is an elevational view, partly in cross section, of an inner expanding casing hanger in its collapsed position illustrating the connecting assembly of the present invention being run inside of a casing
  • FIG. 4 is a view similar to that of FIG. 3 showing the inner hanger locking assembly in its outwardly biased position and in locked position in an outer casing hanger,
  • FIG. 5 is an elevational view, partly in cross section, illustrating another embodiment of the well casing hanger locking assembly of the present invention being run inside of a casing
  • FIG. 6 is a view similar to that of FIG. 5 showing the locking mechanism locked in an outer casing hanger
  • FIG. 7 is an elevational view, partly in cross section, illustrating a modified casing hanger locking assembly being run inside of a casing
  • FIG. 8 is a view similar to that of FIG. 7 showing the locking mechanism locked in an outer casing hanger.
  • a first inner casing hanger I0 is shown which is desired to be connected and released from a second outer casing hanger 12, both of which are tubular members in which the casing hanger I0 is supported suspending a string of casing in a well from the outer casing hanger 12.
  • the casing hanger assembly 10 includes an annular recess 14 in its outer peripheral surface for carrying an expandable biased and resiliently contracting locking means, generally indicated by the reference numeral 16.
  • the locking means 16 may be of any suitable type.
  • One form of locking means is shown in FIG. I, generally indicated by the reference numeral 18 consisting of a plurality of dogs 20 which are normally urged to an expanded position but yieldably contract or retract in the recess 14 when the casing hanger 10 is being run in the well casing 34.
  • the dogs 20 are yieldably urged to an expanded position by suitable biasing means such as springs 22 and 24, as will be more fully described hereinafter for engagement with the casing hanger I2 for locking the casing hangers l0 and 12 together, and may thereafter be contracted back into the recess 14 for releasing the first and second casing hangers l0 and 12 from each other by suitable longitudinal movement of the casing hanger 10.
  • another suitable type of locking means 26 is illustrated consisting of a resilient biasing locking ring having a slot 28 for allowing the ring 26 to be expanded and contracted between the casing hangers l0 and 12.
  • the casing hanger assembly 10 is provided with an upper radially extending stop shoulder 30 at the top of the recess 14 and a lower radial extending stop shoulder 32 at the bottom of the recess 14.
  • the locking means I6 is axially slidable in the recess 14 between the upper stop shoulder 30 and the lower stop shoulder 32.
  • the recess 14 supports the locking means 16 and allows the locking means 16 to contract inwardly into the recess 14 as the hanger assembly 10 is moved downhole through a casing 34 as best seen in FIG. 3.
  • the locking means 16 includes an upper locking portion 36 and a lower key portion 38 for coacting with the locking notch 40 in the second casing hanger assembly 12, as best seen in FIG. 4.
  • the locking notch 40 includes an upper locking portion 42 and a lower key receiving portion 44.
  • the key portion 38 prevents the locking portion 36 of the locking means 16 from expanding outwardly and inadvertently engaging various shoulders in the well casing 34 3 until the key 38 is located adjacent the key receiving portion 44.
  • the locking notch 42 includes a hanging shoulder 46 which extends inwardly towards the casing hanger It for coacting with the engaging shoulder 45 on the locking portion 36 of the locking means 16.
  • the recess I4 includes a locking shoulder 48 on the first casing hanger assembly I below and adjacent the stop shoulder 30 and a tapered shoulder 50 below the locking shoulder 48.
  • the locking portion 36 of the locking means 16 includes a tapered surface 52 which coacts with the tapered shoulder 50 to assist in moving the locking ring I6 outwardly and into engagement with the locking notch 40 on longitudinal downward movement of the casing hanger assembly 10 relative to the locking means I6 when locking means 16 engages the casing hanger assembly I2.
  • a locking surface 54 is provided on the backside of the locking means 16 adjacent its upper end for coaction with the locking shoulder 48 for maintaining the locking means 16 in the ex panded and locked position in the locking notch 40 whereby the casing hanger assembly 10 may be connected to and suspended from the casing hanger assembly 12 so long as weight is exerted downwardly on the casing hanger assembly 10.
  • a second locking shoulder 56 is positioned in the recess l4 and connected to the casing hanger assembly 10 and positioned between the stop shoulders and 32 and extends radially outward from the recess 14 approximately the same radial distance as the first locking shoulder 48 and includes a tapered surface 51.
  • a receiving notch 58 is provided in the backside of the locking means 16 which initially coacts with the second locking shoulder 56 and/or shear rings 60 for allowing the locking means 16 to be retracted in the recess 14, but which also allows the locking means 16 to expand outwardly into the locking notch and axially move towards the top of the recess 14.
  • Suitable shear means may be provided connected to the first casing hanger assembly 10 for initially restricting the longitudinal or axial movement of the locking means 16 relative to the recess 14.
  • a ring 60 is connected to the locking shoulder 56 by a shear means such as pin 62.
  • the locking means 16 When the locking means 16 is brought into alignment with the locking notch 40 on the second casing hanger 12, the locking means 16 is expanded and downward movement of the first casing hanger assembly 10 relative to the locking means 16 causes the surface 53 of receiving notch 58 to bear on ring 60 and shear the pin 62. Upon further downward movement of the casing hanger assembly 10, the tapered shoulders 50 and 51 on assembly 10, respectively, contact and engage the tapered surface 52 and on the back of the locking means 16 and the bottom surface 53 of notch 58, forcing the locking portion 36 further into the locking portion 42 of the locking notch 40.
  • the shear ring 60 is protectively positioned in the notch 58 and therefore will not catch on shoulders in the well tubing and accidentally shear at an undesired position. After being sheared, it remains captive in the notch 58 eliminating the possibility of falling off into the casing.
  • the casing hanger assembly 10 may be easily released and removed from the casing hanger assembly 12 by an upward longitudinal movement of the casing hanger 10 which will allow the locking means 16 to be moved axially downward until the lower end of the locking means 16 contacts the stop shoulder 32 and the notch 58 is thereby aligned with the second locking shoulder 56 and the top locking surface 54 is removed to a position below the first locking shoulder 48.
  • upward movement of the casing hanger assembly 10 allows the locking means 16 to be retracted into the recess l4 and the assembly 10 is moved uphole.
  • FIGS. 5, 6, 7 and 8 where like character references refer to like parts with the addition of the suffix a, and b.
  • an outwardly biased and resiliently contracting locking means 160 which is shown as the type shown in FIG. 1, is carried in a recess 14a in the casing hanger assembly 10a and is retracted therein when moving through a a casing 340, as best seen in FIG. 5, and is expandable for engaging a Iockin g notch 40a in the casing hanger assembly 12a, as best seen in FIG. 6.
  • the locking means 160 is of the resilient dog type shown in FIG. 1, suitable means are provided for retaining the ends of the locking means 160 in the recess 14a.
  • a first ring is provided secured to the casing hanger 10a by a plurality of pins 72 for encircling the lower end of the recess 14a and thus the lower end of the locking means 16a for retaining the lower ends of the dogs in the recess 140.
  • An upper ring 74 is provided secured to the casing hanger 10a by a plurality of pins 76 for encircling the upper end of the recess 14a and retaining the upper ends of the locking means 16a in the recess 14a.
  • the second locking shoulder 56a is initially positioned in the receiving notch 58a in the locking means in the retracted positioned for holding and aligning the locking means 160 in the recess 140.
  • FIGS. 5 and 6 the second locking shoulder 56a is initially positioned in the receiving notch 58a in the locking means in the retracted positioned for holding and aligning the locking means 160 in the recess 140.
  • the shear means may be provided at the top of the locking means such as by making the pins 76 shear pins.
  • the locking means 160 is resiliently urged outwardly to engage the locking notch 40a. Further downward movement of the casing 10a shears the pins 76 and moves the top locking shoulder 48a behind the locking surface 54a on the locking means 16a adjacent the top end of the locking means 16a, and slides the ring 74 upwardly and moves the lower locking shoulder 56a to a position behind the lower locking surface 640 on the locking means 16a.
  • FIGS. 7 and 8 an outwardly biased and resiliently contractible locking means 16b is shown carried in a recess 14!; in a casing hanger b, which locking means 16b may be of the locking ring type shown in FIG. 2.
  • the embodiment shown in FIGS. 7 and 8 is identical to that shown in FIGS. 3 and 4 with the exception of the shear means.
  • the shear means is positioned at the lower end of the locking means 16b and consists of a locking ring 80 connected to the casing hanger 10b by shear pins 82.
  • the ring 80 includes a downwardly directed shoulder 84 arranged to engage in upwardly directed shoulder 86 on the locking means 16b when the locking means 16b is expanded.
  • FIGS. 5, 6, 7 and 8 are released similar to the embodiment of FIGS. 3 and 4 by a longitudinal upward movement of the casing hanger 10a and 10b, relative to the casing hangers 12a and 12b, respectively.
  • first and second tubular members to and from each other in a well by 1ongitudinal movement of the first member
  • said first member including an annular recess in its peripheral surface adjacent the second member, a radially extending stop shoulder on the first member at each of the top and bottom ends of the recess, resiliently expandable and contractible locking means positioned in said recess and axially slidable therein between said stop shoulders, a locking shoulder on the first member below and adjacent the stop shoulder at the top end of the recess, a locking notch on the second member in its peripheral surface adjacent the first member for receiving the expanded and locked means, the improvement comprising,
  • shear means to limit axial movement of the locking means on the first member until the locking means engages the locking notch in the second member.
  • first and second tubular members to and from each other in a well by lon gitudinal movement of the first member
  • said first member including an annular recess in its peripheral surface adjacent the second member, a radially extending stop shoulder on the first member at each end of the recess, a resiliently expandable and contractible locking means positioned in said recess and axially slidable therein between said stop shoulders, locking shoulder on the first member for locking said locking means in an expandable position, a locking notch on the second member in its peripheral surface adjacent the first member for receiving the expanded and locked locking means, the improvement comprising,
  • shearable holding means intermediate the ends of the resiliently expandable and contractible locking means said shearable holding means acting to prevent axial movement of said expandable and contractible locking means on the first member until said locking means engages said locking notch and the shearable holding means which when sheared by downward longitudinal movement of the first member allows the upper portion of the locking means to releasably lock the first anad second members together.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Supports For Pipes And Cables (AREA)
  • Earth Drilling (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
US465028A 1974-05-15 1974-05-15 Well casing hanger assembly Expired - Lifetime US3893717A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US465028A US3893717A (en) 1974-05-15 1974-05-15 Well casing hanger assembly
FR7509583A FR2271379B1 (de) 1974-05-15 1975-03-27
GB12826/75A GB1491378A (en) 1974-05-15 1975-03-27 Well casing hanger assembly
CA224,810A CA1011650A (en) 1974-05-15 1975-04-16 Well casing hanger assembly
BR2998/75A BR7502354A (pt) 1974-05-15 1975-04-17 Aperfeicoamento em conjunto para ligacao de primeiro e segundo membros tubulares entre si
DE2520237A DE2520237C2 (de) 1974-05-15 1975-05-07 Vorrichtung zur lösbaren Verbindung zweier rohrförmiger Bohrlochelemente
DE19752560563 DE2560563C2 (de) 1974-05-15 1975-05-07 Vorrichtungen zur lösbaren Verbindung zweier rohrförmiger Bohrlochelemente
NO751702A NO146476C (no) 1974-05-15 1975-05-14 Broennroerhengeranordning for sammenkopling av foerste og andre roerformede deler i en broenn
NL7505634A NL7505634A (nl) 1974-05-15 1975-05-14 Hanginrichting voor een putverbuizing.
AU81149/75A AU493420B2 (en) 1974-05-15 1975-05-14 Well casing hanger assembly
JP50057887A JPS5750237B2 (de) 1974-05-15 1975-05-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US465028A US3893717A (en) 1974-05-15 1974-05-15 Well casing hanger assembly

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US3893717A true US3893717A (en) 1975-07-08

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US465028A Expired - Lifetime US3893717A (en) 1974-05-15 1974-05-15 Well casing hanger assembly

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US (1) US3893717A (de)
JP (1) JPS5750237B2 (de)
BR (1) BR7502354A (de)
CA (1) CA1011650A (de)
DE (1) DE2520237C2 (de)
FR (1) FR2271379B1 (de)
GB (1) GB1491378A (de)
NL (1) NL7505634A (de)
NO (1) NO146476C (de)

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051896A (en) * 1974-12-18 1977-10-04 Otis Engineering Corporation Well bore liner hanger
US4139059A (en) * 1977-12-12 1979-02-13 W-K-M Wellhead Systems, Inc. Well casing hanger assembly
US4139836A (en) * 1977-07-01 1979-02-13 Sperry-Sun, Inc. Wellbore instrument hanger
US4161984A (en) * 1978-09-11 1979-07-24 Camco, Incorporated Well locking device and method
US4167971A (en) * 1978-06-16 1979-09-18 Armco Inc. Hanger apparatus for suspending pipes
US4167970A (en) * 1978-06-16 1979-09-18 Armco Inc. Hanger apparatus for suspending pipes
US4269268A (en) * 1978-06-16 1981-05-26 Armco Inc. Hanger apparatus for suspending pipes with positive retrieval capability
US4276932A (en) * 1979-10-10 1981-07-07 Nl Industries, Inc. Well casing hanger assembly
US4290483A (en) * 1980-02-11 1981-09-22 Armco Inc. Latch means for well tools and components
US4295665A (en) * 1979-09-04 1981-10-20 Petroleum Designers, Inc. Well casing suspension system
WO1982001393A1 (en) * 1980-10-15 1982-04-29 Iron Works Inc Cameron Mudline suspension system
US4399873A (en) * 1981-06-16 1983-08-23 Mwl Tool And Supply Company Retrievable insert landing assembly
US4406325A (en) * 1981-10-02 1983-09-27 Baker International Corporation Selective no-go apparatus
US4460042A (en) * 1981-10-29 1984-07-17 Armco Inc. Dual ring casing hanger
US4465133A (en) * 1982-09-15 1984-08-14 Combustion Engineering, Inc. Casing hanger collet
US4496162A (en) * 1982-08-23 1985-01-29 Cameron Iron Works, Inc. Well sealing assembly having resilient seal ring with metal end caps
US4528738A (en) * 1981-10-29 1985-07-16 Armco Inc. Dual ring casing hanger
US4569404A (en) * 1984-03-22 1986-02-11 Vetco Offshore, Inc. Mudline casing hanger
US4607865A (en) * 1984-10-16 1986-08-26 Vetco Offshore Industries, Inc. Connector, ratcheting type
US4641708A (en) * 1985-09-06 1987-02-10 Hughes Tool Company Casing hanger locking device
US4681166A (en) * 1986-08-18 1987-07-21 Hughes Tool Company Internal nonrotating tie-back connector
US4730851A (en) * 1986-07-07 1988-03-15 Cooper Industries Downhole expandable casting hanger
US4773477A (en) * 1987-03-24 1988-09-27 Norman A. Nelson Well suspension assembly
US4958686A (en) * 1989-08-30 1990-09-25 Norman A. Nelson Subsea well completion system and method of operation
US5004272A (en) * 1989-09-15 1991-04-02 Shell Oil Company Tendon bottom connector for a tension leg platform
US5145228A (en) * 1990-03-29 1992-09-08 Otis Engineering Corporation Running and pulling tool
US5379837A (en) * 1992-06-09 1995-01-10 Well-Equip Limited Locking member for securing to a lock structure in a conduit
EP0898048A2 (de) * 1997-08-20 1999-02-24 Halliburton Energy Services, Inc. Abhängeelement für Bohrlöcher
US5984008A (en) * 1997-10-16 1999-11-16 Erc Industries, Inc. Installable load shoulder for use in a wellhead to support a tubing hanger
US6484382B1 (en) * 2000-03-23 2002-11-26 Erc Industries, Inc. Method of providing an internal circumferential shoulder in a cylindrical passageway
WO2002095178A2 (en) * 2001-05-18 2002-11-28 Dril-Quip, Inc. Apparatus for suspending a pipe within a well casing
US6655456B1 (en) 2001-05-18 2003-12-02 Dril-Quip, Inc. Liner hanger system
US6688399B2 (en) * 2001-09-10 2004-02-10 Weatherford/Lamb, Inc. Expandable hanger and packer
US6691789B2 (en) 2001-09-10 2004-02-17 Weatherford/Lamb, Inc. Expandable hanger and packer
US20050121202A1 (en) * 2003-06-13 2005-06-09 Abercrombie Simpson Neil A. Method and apparatus for supporting a tubular in a bore
US20110079383A1 (en) * 2009-10-05 2011-04-07 Porter Jesse C Interchangeable drillable tool
US20110114330A1 (en) * 2009-11-17 2011-05-19 Vetco Gray Inc. Combination Well Pipe Centralizer and Overpull Indicator
US20120298376A1 (en) * 2011-05-25 2012-11-29 Twardowski Eric M Tubular coupling device
US20130068466A1 (en) * 2011-09-16 2013-03-21 Vetco Gray Inc. Latching mechanism with adjustable preload
US8413730B2 (en) * 2010-11-30 2013-04-09 Vetco Gray Inc. Wellhead assembly with telescoping casing hanger
US20140166315A1 (en) * 2012-12-17 2014-06-19 Baker Hughes Incorporated Lock assembly with cageless dogs
US20200232293A1 (en) * 2019-01-17 2020-07-23 Baker Hughes Oilfield Operations Llc Method and apparatus for preventing premature set of liner top packer

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US5620052A (en) * 1995-06-07 1997-04-15 Turner; Edwin C. Hanger suspension system

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US3472530A (en) * 1966-09-20 1969-10-14 Rockwell Mfg Co Pipe apparatus

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US3741589A (en) 1971-11-11 1973-06-26 Rockwell Mfg Co Pipe hanger

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US3472530A (en) * 1966-09-20 1969-10-14 Rockwell Mfg Co Pipe apparatus
US3420308A (en) * 1967-08-16 1969-01-07 Fmc Corp Well casing hanger

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051896A (en) * 1974-12-18 1977-10-04 Otis Engineering Corporation Well bore liner hanger
US4139836A (en) * 1977-07-01 1979-02-13 Sperry-Sun, Inc. Wellbore instrument hanger
US4139059A (en) * 1977-12-12 1979-02-13 W-K-M Wellhead Systems, Inc. Well casing hanger assembly
US4167971A (en) * 1978-06-16 1979-09-18 Armco Inc. Hanger apparatus for suspending pipes
US4167970A (en) * 1978-06-16 1979-09-18 Armco Inc. Hanger apparatus for suspending pipes
US4269268A (en) * 1978-06-16 1981-05-26 Armco Inc. Hanger apparatus for suspending pipes with positive retrieval capability
US4161984A (en) * 1978-09-11 1979-07-24 Camco, Incorporated Well locking device and method
US4295665A (en) * 1979-09-04 1981-10-20 Petroleum Designers, Inc. Well casing suspension system
US4276932A (en) * 1979-10-10 1981-07-07 Nl Industries, Inc. Well casing hanger assembly
US4290483A (en) * 1980-02-11 1981-09-22 Armco Inc. Latch means for well tools and components
WO1982001393A1 (en) * 1980-10-15 1982-04-29 Iron Works Inc Cameron Mudline suspension system
US4355825A (en) * 1980-10-15 1982-10-26 Cameron Iron Works, Inc. Mudline suspension system
US4399873A (en) * 1981-06-16 1983-08-23 Mwl Tool And Supply Company Retrievable insert landing assembly
US4406325A (en) * 1981-10-02 1983-09-27 Baker International Corporation Selective no-go apparatus
US4460042A (en) * 1981-10-29 1984-07-17 Armco Inc. Dual ring casing hanger
US4528738A (en) * 1981-10-29 1985-07-16 Armco Inc. Dual ring casing hanger
US4496162A (en) * 1982-08-23 1985-01-29 Cameron Iron Works, Inc. Well sealing assembly having resilient seal ring with metal end caps
US4465133A (en) * 1982-09-15 1984-08-14 Combustion Engineering, Inc. Casing hanger collet
US4569404A (en) * 1984-03-22 1986-02-11 Vetco Offshore, Inc. Mudline casing hanger
US4607865A (en) * 1984-10-16 1986-08-26 Vetco Offshore Industries, Inc. Connector, ratcheting type
US4641708A (en) * 1985-09-06 1987-02-10 Hughes Tool Company Casing hanger locking device
US4730851A (en) * 1986-07-07 1988-03-15 Cooper Industries Downhole expandable casting hanger
US4681166A (en) * 1986-08-18 1987-07-21 Hughes Tool Company Internal nonrotating tie-back connector
US4773477A (en) * 1987-03-24 1988-09-27 Norman A. Nelson Well suspension assembly
US4958686A (en) * 1989-08-30 1990-09-25 Norman A. Nelson Subsea well completion system and method of operation
US5004272A (en) * 1989-09-15 1991-04-02 Shell Oil Company Tendon bottom connector for a tension leg platform
US5145228A (en) * 1990-03-29 1992-09-08 Otis Engineering Corporation Running and pulling tool
US5379837A (en) * 1992-06-09 1995-01-10 Well-Equip Limited Locking member for securing to a lock structure in a conduit
EP0898048A2 (de) * 1997-08-20 1999-02-24 Halliburton Energy Services, Inc. Abhängeelement für Bohrlöcher
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Also Published As

Publication number Publication date
JPS50160102A (de) 1975-12-25
DE2520237A1 (de) 1975-11-27
NO751702L (de) 1975-11-18
JPS5750237B2 (de) 1982-10-26
AU8114975A (en) 1976-11-18
FR2271379B1 (de) 1982-10-22
NL7505634A (nl) 1975-11-18
GB1491378A (en) 1977-11-09
BR7502354A (pt) 1976-03-23
CA1011650A (en) 1977-06-07
NO146476B (no) 1982-06-28
DE2520237C2 (de) 1984-10-04
FR2271379A1 (de) 1975-12-12
NO146476C (no) 1982-10-13

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