US3356147A - Centralizer device for casings in boreholes - Google Patents
Centralizer device for casings in boreholes Download PDFInfo
- Publication number
- US3356147A US3356147A US540270A US54027066A US3356147A US 3356147 A US3356147 A US 3356147A US 540270 A US540270 A US 540270A US 54027066 A US54027066 A US 54027066A US 3356147 A US3356147 A US 3356147A
- Authority
- US
- United States
- Prior art keywords
- bowed
- collar
- collars
- recess
- centralizer
- 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
Links
- 210000002105 tongue Anatomy 0.000 description 13
- 238000005299 abrasion Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
- E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
Definitions
- a field-assemblable casing centralizer consisting of a pair of collars and connecting leaf springs secured to the collars by means of U-shaped offsetsseated in recesses in the inner faces of the collars and secured by overlying tongues.
- This invention relates to centralizer devices to be mounted on oil well casings for maintaining substantially uniform clearance between the casing and the bore wall both for protecting the casing in running into the well and preparatory to cementing.
- Such centralizers conventionally have consisted of axially-spaced collars for reception about the casing and connected by bowed leaf springs, bars, or wires arranged annularly about the collars.
- the bowed springs or other elements frequently are constructed of high tempered spring steel to better resist the stresses and abrasion to which the centralizers are subjected in being run into the well on the casing. It has been found that the regions of attachment of the bowed elements to the collars frequently do not withstand these stresses and abrasions, especially where the bows are welded to the collars causing changes in the physical properties of the affected metal.
- the present invention has for its object to provide a centralizer which may be readily assembled in different combinations and sizes of collars and bows.
- Another object is to provide a centralizer which will better resist the stresses and abrasions incident to normal use in the well than previous centralizers.
- novel centralizer device hereinafter described which consists in general of a pair of collars, conveniently split and hinged and otherwise secured together, for em bracing the casing, and bowed leaf springs connecting the collars and secured at their ends thereto.
- the leaf spring and collar attachments are effected by means of an annular series of recesses or pockets preferably in the inner face of each collar in which recesses or pockets are snugly nested generally U-shaped offsets in the ends of the bowed elements. Tongues projecting circumferentially from the collar overlie the nested offsets and firmly maintain the assembly.
- FIG. 1 is an elevational perspective showing the novel centralizer mounted on a casing section
- FIG. 2 is a detail longitudinal (axial) section taken on line 22 of FIG. 1;
- FIG. 3 is an end view of one of the collars disassembled from the bowed elements and casing.
- FIG. 4 is a partial inside view of one of the collars assembled with a bowed element.
- FIG. 1 shows a portion of a conventional casing section 7 having any type of stop collar 8 secured thereto between the end collars, generally designated 9 and 10, of the novel centralizer device.
- bowed elements 11 preferably of spring steel straps, six being provided in this instance arranged symmetrically about the collars.
- the collars preferably are identical, although one of them may be otherwise formed.
- the novel collar in this instance, is of the split type, with the halves connected by pinned hinges, as at 15 and 16.
- Each recess has upper and lower shoulders 18 and 19 which are axially spaced apart sufiiciently to snugly but freely receive therebetween an offset element 12 at the end of one of the bowed elements 11.
- each recess 17 that is, the collar portions which, in the assembly, are traversed by portions 22 and 23 of a bowed element in the assemblyare recessed outwardly by the amount at least equal to the thickness of the bowed element portions 22 and 23 so that these latter portions, in the assembly, will be within the general corrfines of the inner surface of the collar, as represented by the face portions 24 between recesses 17.
- these tongues are bent against the inner faces of offsets 12 so as to firmly secure the bowed elements to the collar.
- the sides edges 27 and 28 of recesses 17 are circumferentially spaced to freely receive the end of a bowed element 11 therebetween.
- the centralizer will first be assembled of collars and bowed bars or leaf springs of the desired size and configuration.
- the end portion of each such bowed element will be inserted beneath a tongue 25 and nested in the corresponding collar recess 17.
- the recess 17, between its opposing axially-facing shoulders 18 and 19, as stated, will be positioned to freely but snugly receive the corresponding bowed element offset 12.
- the inner faces of bowed element parts 22 and 23 will be flush with the inner face portions 24 of the collar in the assembly to form a generally smooth inner face for opposing the casing.
- the outer face portions of offsets 12, preferably, will be flush with the outer surfaces of portions 20 and 21 of the collar, as indicated in FIG. 2.
- tongues 25 will be bent, as shown in FIGS. 2 and 4, across and in engagement with the inner faces of ofisets 12.
- the bowed elements may be applied to the outer rather than the inner faces of the collars upon reversal of the offsets 12 and the collar indentations.
- the tongues 12 may be secured at both ends to the collar and the bowed elements slipped endwise into recesses 17.
- both such operations can be performed. It is particularly important that the attached collars and end portions of the bowed elements, while firmly secured together, are not under stress, and no welding is required such as might deleteriously affect the characteristics of the metal. While such centralizers, ordinarily, are cemented into the well, it would be possible, if necessary, to disassemble a centralizer by bending the tongues outwardly sufificiently to permit withdrawal of offsets 17 from the recesses 12.
- collar and bowed element attaching means comprising a radial recess in a lateral face of the collar forming axially-spaced, opposing shoulders, a generally U-shaped offset in the end portion of said bowed element nested in said recess, and a tongue projecting from at least one side edge of said recess across said offset and confining said element in said recess.
- Ceneralizer collar and bowed element attaching means as described in claim 1 in which said recess is formed by a cut-out portion of said collar, said tongue projecting circumferentially from the body of the collar adjacent said portion.
- a centralizer of the type having axially spaced collars for reception about a casing and outwardly bowed elements connecting said collars, bowed element and collar attaching means comprising an annular series of recesses in the inner face of at least one of said collars, generally U-shaped offsets in at least one end of each of said bowed elements, respectively snugly nested in said recesses, and tongues projecting circumferentially from said collar face across and engaging said offsets and within the general confines of said inner face for detachably securing together said collar and said elements.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW38919A DE1233345B (de) | 1965-04-07 | 1965-04-07 | Auf einem Rohr aufsetzbarer Zentrierkorb fuer Bohrungen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3356147A true US3356147A (en) | 1967-12-05 |
Family
ID=7601939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US540270A Expired - Lifetime US3356147A (en) | 1965-04-07 | 1966-04-05 | Centralizer device for casings in boreholes |
Country Status (5)
Country | Link |
---|---|
US (1) | US3356147A (de) |
AT (1) | AT259484B (de) |
DE (1) | DE1233345B (de) |
GB (1) | GB1110840A (de) |
NL (1) | NL151159B (de) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2545181A1 (de) * | 1974-10-08 | 1976-04-22 | Caslake Ltd J | Zentralisiervorrichtung, vorzugsweise fuer die zentrale fuehrung von rohren, insbesondere der verrohrung von erdbohranlagen |
US4077470A (en) * | 1977-01-27 | 1978-03-07 | Weatherford/Lamb, Inc. | Well centralizer and method of making |
US4219081A (en) * | 1978-11-03 | 1980-08-26 | Halliburton Services | Knockdown centralizer |
US4255847A (en) * | 1978-11-03 | 1981-03-17 | Halliburton Company | Method of making a knockdown centralizer |
US4269269A (en) * | 1979-05-14 | 1981-05-26 | Halliburton Company | Lock tab for centralizer end ring |
US4520869A (en) * | 1983-09-29 | 1985-06-04 | Svenson Bert N | Centralizer for well casings |
US4651823A (en) * | 1986-05-19 | 1987-03-24 | Antelope Oil Tool & Mfg. Company | Centralizer |
US4909322A (en) * | 1989-04-26 | 1990-03-20 | Davis-Lynch, Inc. | Casing centralizer |
US6871706B2 (en) * | 2002-03-11 | 2005-03-29 | Albert Hennessey | Casing centralizer |
US20080283253A1 (en) * | 2007-05-16 | 2008-11-20 | Frank's International, Inc. | Expandable Centralizer For Expandable Pipe String |
WO2008144249A2 (en) * | 2007-05-16 | 2008-11-27 | Frank's International, Inc. | Expandable centralizer for expandable pipe string |
US20090025929A1 (en) * | 2007-07-26 | 2009-01-29 | Frank's International, Inc. | Apparatus for and Method of Deploying a Centralizer Installed on an Expandable Casing String |
US20090308615A1 (en) * | 2008-06-11 | 2009-12-17 | Frank's International, Inc. | Modular Low-Clearance Centralizer and Method of Making Modular Low-Clearance Centralizer |
US20100078173A1 (en) * | 2008-09-29 | 2010-04-01 | Frank's International, Inc. | Downhole device actuator and method |
US7845061B2 (en) | 2007-05-16 | 2010-12-07 | Frank's International, Inc. | Low clearance centralizer and method of making centralizer |
US20110042102A1 (en) * | 2009-08-18 | 2011-02-24 | Frank's International, Inc. | Method of and kit for installing a centralizer on a pipe segment |
US8770280B2 (en) | 2007-05-16 | 2014-07-08 | Antelope Oil Tool & Mfg. Co., Llc | Expandable centralizer for expandable pipe string |
WO2017120515A1 (en) * | 2016-01-08 | 2017-07-13 | Blackhawk Specialty Tools, Llc | Method and apparatus for wellbore centralization |
US9759023B2 (en) | 2007-05-16 | 2017-09-12 | Antelope Oil Tool & Mfg. Co. | Apparatus for securing a centralizer to a tubular |
US9771763B2 (en) | 2007-05-16 | 2017-09-26 | Antelope Oil Tool & Mfg. Co. | Low-clearance centralizer |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2179079A (en) * | 1985-08-15 | 1987-02-25 | William Hunt Engineers Limited | Well casing tools |
US4787458A (en) * | 1987-05-29 | 1988-11-29 | Weatherford U. S., Inc. | Spring bow, centralizer, and related methods |
US4794986A (en) * | 1987-11-27 | 1989-01-03 | Weatherford U.S., Inc. | Reticulated centralizing apparatus |
DE4024000C2 (de) * | 1990-07-28 | 1994-07-28 | Weatherford Oil Tool | Rohrzentrierkorb mit Spanneinrichtung |
WO2021022093A1 (en) * | 2019-08-01 | 2021-02-04 | Chevron U.S.A. Inc. | Artificial lift systems utilizing high speed centralizers |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2680488A (en) * | 1949-12-15 | 1954-06-08 | Atkinson Albert Edward | Device for centralizing casings in boreholes |
US2738019A (en) * | 1951-05-22 | 1956-03-13 | Atkinson Albert Edward | Devices for centralizing casing in boreholes |
US3055432A (en) * | 1960-06-23 | 1962-09-25 | Baker Oil Tools Inc | Well conduit centering devices |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2228649A (en) * | 1940-06-17 | 1941-01-14 | Baker Oil Tools Inc | Casing centralizer |
FR1299603A (fr) * | 1961-06-12 | 1962-07-27 | Baker Oil Tools Inc | Dispositif de centrage utilisable dans les puits ou forages |
FR1338552A (fr) * | 1962-08-18 | 1963-09-27 | Materiel Pour La Rech Et L Exp | Perfectionnements aux centreurs de tubes de sondage ou |
-
1965
- 1965-04-07 DE DEW38919A patent/DE1233345B/de active Pending
- 1965-12-28 AT AT1173165A patent/AT259484B/de active
-
1966
- 1966-01-17 NL NL666600554A patent/NL151159B/xx not_active IP Right Cessation
- 1966-04-05 US US540270A patent/US3356147A/en not_active Expired - Lifetime
- 1966-04-07 GB GB15527/66A patent/GB1110840A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2680488A (en) * | 1949-12-15 | 1954-06-08 | Atkinson Albert Edward | Device for centralizing casings in boreholes |
US2738019A (en) * | 1951-05-22 | 1956-03-13 | Atkinson Albert Edward | Devices for centralizing casing in boreholes |
US3055432A (en) * | 1960-06-23 | 1962-09-25 | Baker Oil Tools Inc | Well conduit centering devices |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2545181A1 (de) * | 1974-10-08 | 1976-04-22 | Caslake Ltd J | Zentralisiervorrichtung, vorzugsweise fuer die zentrale fuehrung von rohren, insbesondere der verrohrung von erdbohranlagen |
US4042022A (en) * | 1974-10-08 | 1977-08-16 | Weatherford Oil Tool (U.K.) Limited | Devices for centralizing pipes in borings |
US4077470A (en) * | 1977-01-27 | 1978-03-07 | Weatherford/Lamb, Inc. | Well centralizer and method of making |
DE2802109A1 (de) * | 1977-01-27 | 1978-08-03 | Weatherford Lamb | Bohrloch-zentrierstueck und verfahren zu seiner herstellung |
US4219081A (en) * | 1978-11-03 | 1980-08-26 | Halliburton Services | Knockdown centralizer |
US4255847A (en) * | 1978-11-03 | 1981-03-17 | Halliburton Company | Method of making a knockdown centralizer |
US4269269A (en) * | 1979-05-14 | 1981-05-26 | Halliburton Company | Lock tab for centralizer end ring |
US4520869A (en) * | 1983-09-29 | 1985-06-04 | Svenson Bert N | Centralizer for well casings |
EP0143219A1 (de) * | 1983-09-29 | 1985-06-05 | Bert N. Svenson | Zentrierkorb für Futterrohre von Bohrungen |
US4651823A (en) * | 1986-05-19 | 1987-03-24 | Antelope Oil Tool & Mfg. Company | Centralizer |
US4909322A (en) * | 1989-04-26 | 1990-03-20 | Davis-Lynch, Inc. | Casing centralizer |
US6871706B2 (en) * | 2002-03-11 | 2005-03-29 | Albert Hennessey | Casing centralizer |
WO2008144249A3 (en) * | 2007-05-16 | 2009-01-15 | Frank S Inr Inc | Expandable centralizer for expandable pipe string |
US8770280B2 (en) | 2007-05-16 | 2014-07-08 | Antelope Oil Tool & Mfg. Co., Llc | Expandable centralizer for expandable pipe string |
US20080283253A1 (en) * | 2007-05-16 | 2008-11-20 | Frank's International, Inc. | Expandable Centralizer For Expandable Pipe String |
US9771763B2 (en) | 2007-05-16 | 2017-09-26 | Antelope Oil Tool & Mfg. Co. | Low-clearance centralizer |
US9759023B2 (en) | 2007-05-16 | 2017-09-12 | Antelope Oil Tool & Mfg. Co. | Apparatus for securing a centralizer to a tubular |
EP2578796A3 (de) * | 2007-05-16 | 2014-08-27 | Frank's International, Inc. | Zentrierkorb für erweiterbare Bohrlochrohre |
US7845061B2 (en) | 2007-05-16 | 2010-12-07 | Frank's International, Inc. | Low clearance centralizer and method of making centralizer |
US7878241B2 (en) | 2007-05-16 | 2011-02-01 | Frank's International, Inc. | Expandable centralizer for expandable pipe string |
WO2008144249A2 (en) * | 2007-05-16 | 2008-11-27 | Frank's International, Inc. | Expandable centralizer for expandable pipe string |
US20110146971A1 (en) * | 2007-05-16 | 2011-06-23 | Frank's International, Inc. | Low Clearance Centralizer and Method of Making Centralizer |
US8662166B2 (en) | 2007-05-16 | 2014-03-04 | Antelope Oil Tool & Mfg. Co., Llc | Low clearance centralizer |
US8701783B2 (en) | 2007-07-26 | 2014-04-22 | Antelope Oil Tool & Mfg. Co., Llc | Apparatus for and method of deploying a centralizer installed on an expandable casing string |
US20090025929A1 (en) * | 2007-07-26 | 2009-01-29 | Frank's International, Inc. | Apparatus for and Method of Deploying a Centralizer Installed on an Expandable Casing String |
US20090308615A1 (en) * | 2008-06-11 | 2009-12-17 | Frank's International, Inc. | Modular Low-Clearance Centralizer and Method of Making Modular Low-Clearance Centralizer |
US8360161B2 (en) | 2008-09-29 | 2013-01-29 | Frank's International, Inc. | Downhole device actuator and method |
US20100078173A1 (en) * | 2008-09-29 | 2010-04-01 | Frank's International, Inc. | Downhole device actuator and method |
US20110042102A1 (en) * | 2009-08-18 | 2011-02-24 | Frank's International, Inc. | Method of and kit for installing a centralizer on a pipe segment |
WO2017120515A1 (en) * | 2016-01-08 | 2017-07-13 | Blackhawk Specialty Tools, Llc | Method and apparatus for wellbore centralization |
Also Published As
Publication number | Publication date |
---|---|
GB1110840A (en) | 1968-04-24 |
NL151159B (nl) | 1976-10-15 |
DE1233345B (de) | 1967-02-02 |
AT259484B (de) | 1968-01-10 |
NL6600554A (de) | 1966-10-10 |
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