US2666241A - Band end connection - Google Patents
Band end connection Download PDFInfo
- Publication number
- US2666241A US2666241A US151456A US15145650A US2666241A US 2666241 A US2666241 A US 2666241A US 151456 A US151456 A US 151456A US 15145650 A US15145650 A US 15145650A US 2666241 A US2666241 A US 2666241A
- Authority
- US
- United States
- Prior art keywords
- collar
- loops
- collars
- pintle
- perforations
- 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
- 238000010276 construction Methods 0.000 description 5
- 239000003129 oil well Substances 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 235000015854 Heliotropium curassavicum Nutrition 0.000 description 1
- 244000301682 Heliotropium curassavicum Species 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S24/00—Buckles, buttons, clasps
- Y10S24/30—Separable-fastener or required component thereof
- Y10S24/31—Separable-fastener or required component thereof with third, detached member completing interlock
- Y10S24/37—Third member consists of unitary elongated element
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/14—Bale and package ties, hose clamps
- Y10T24/1457—Metal bands
- Y10T24/148—End-to-end integral band end connection
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/16—Belt fasteners
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/38—Strap cable or pipe button
-
- 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
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/45—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
- Y10T24/45005—Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] with third detached member completing interlock [e.g., hook type]
- Y10T24/45089—Sliding or rotating element
Definitions
- This invention relates to improvements in fasteners, and refers more particularly to fastening devices for use on scratchers and centralizers employed in oilproduction to condition the well bore prior to cementing.
- the essence of the invention resides in the construction of the collar extremities -by which the tools are attached to the casing or cylindrical objects lowered in thewell during the conditioning operation, including use on logging devices.
- the collar extremities are performed Vand 4doubled back to form registering keeper loops through which pintles are threaded.
- the perforations are so positioned as to produce staggering of the loops on abutting collar extremities and registration of said extensions with the cutaway portions on the opposite collar extremities.
- Another object is to provide separable fasteners of relatively rugged construction capableV of withstanding the abuse to which the collars are subjected in oil well conditioning operations.
- Another object is to provide a fastener construction easily applied to the collars of the tools by welding theedges of separate perforated strips forming the keeper loops of the collar.
- Fig. 1 is a side elevational view of a spiral centralizer utilizing fasteners which embody the invention.
- Fig. 2 is a View taken along the line 2--2 in Fig. l, in the direction of the arrows.
- Fig. 3 is an enlarged detail of a hinge plate showing the manner of perforating before being doubled back to form the keeper member.
- Fig. 4 is a view taken along the line 4-4 in Fig. 3, in the direction of the arrows.
- Fig. 5 is an enlarged disassembled perspective view of the keeper members and pintle before being welded to the collar.
- Fig. 6 is a sectional view taken along the line 6 6 in Fig. 2, in the direction of the arrows.
- Fig. 7 is a sectional view taken through one of the fasteners utilizing a flat pintle.
- Fig. 8 is a sectional view taken through one of 4 Claims. (Cl. .Z4-201) the keepers, designated by the numerals I5b and their ends.
- a casing such as is commonly used in oil Well production.
- a spiral centralizer designated asa Whole by the numeral I I.
- the centralizer has an upper collar I2 and a lower collar I3 with spiral bands'or blades IllA extending between the collars and welded thereto at Collars I2 and I3 are split diametrically, as shown in Fig. 2, and to the abutting edges or extremities of the collars are welded keeper members i5 and I'6, best shown rin Fig. 5.
- the manner of welding the keeper member to the collars is shown in Figs. 7 and 8.
- Fig. 3 is indicated the method of perforating the keeper plates shown at I5.
- the same keeper may be used on opposite sides of the engaging collar extremities by turning the keeper plate through 180 so that the bottom becomes the top.
- the perforations through the plates are so located that when the plates are doubled back,
- a similar type of construction is shown in which a cylindrical pintle 20 is used in place of the flattened strip I9, shown in Fig. 7, so that the two sections of the collar are hinged together and can swing about the pintle as a pivot.
- a retaining stop 2 I shown in cross section in Fig. 6. This stop prevents the pintle from sliding downwardly through the loops and after the pintle has been dropped in place, one side of the upper loop of plate i5 is bent inwardly, as shown in Fig. 6, to prevent dislodgement oi' the pintle upwardly from the loops.
- a fastener offthecharacten describedcom pris-ina,y in, combination, two-complementaryfas.-
- each of said elements having a plurality of aligned perforations and having a flange portion extending along said perforations across one side of the aligning edges of the perforations and having another flange extending along said perforations at the opposite side of the perforations, one of said flanges being wider' than the other flange, said member having a rte-entrant bend across ⁇ A said perforar-tions, with the portions ofsaid meniberV between ⁇ said perforations constituting aligned loops adapted to receive a pintle therein whereby said fastener element is adapted to be secured to one end of a splitcollar of an oil Well scratching or cen tering tool, yor the like, with the Wider flange of said member overlapping and welded to the Y outer surface of the collar and the other ange of said member abutting endwise and welded to the end surface of the collar with the inner surface of said member flush with the inner surfacejof;
- a 'fastener 'assetforth in-cla-i-m 2 and whichv includes a rigid stopat the-bottom ci vthe lower most loop of the fasteneradapted to stop-and hold the pint-le against passing downwardly-out o'f -said loops.
Description
Jan. 19, 1954 J. E. HALL, sR
BAND END CONNECTION Filed March 25, 1950 l AT lllll INVENTOR. A2556 5 Ha@ 5f:
Patented Jan. 19, 1954 UNITED STATES PATENT i OFFICE I 2,666,241 Y v BAND END CONNECTION 4Jesse E. Hall, Sr., Weatherford, Tex. pplcationMarch 23, 1950, Serial No. 151,456
This invention relates to improvements in fasteners, and refers more particularly to fastening devices for use on scratchers and centralizers employed in oilproduction to condition the well bore prior to cementing.
The essence of the invention resides in the construction of the collar extremities -by which the tools are attached to the casing or cylindrical objects lowered in thewell during the conditioning operation, including use on logging devices. The collar extremities are performed Vand 4doubled back to form registering keeper loops through which pintles are threaded. The perforations are so positioned as to produce staggering of the loops on abutting collar extremities and registration of said extensions with the cutaway portions on the opposite collar extremities.
- An object, therefore, `is to provide separable fasteners for'the collars of scratchers and cen-l tralizers which permit easy attachment or mounting, and easy removal to and from thev casing or support.
Another object is to provide separable fasteners of relatively rugged construction capableV of withstanding the abuse to which the collars are subjected in oil well conditioning operations.
Another object is to provide a fastener construction easily applied to the collars of the tools by welding theedges of separate perforated strips forming the keeper loops of the collar.
Other objects will be V4apparentfrom the description ,which follows...
' In theaccompanying drawings lwhich form a part of the specification and are to be read in conjunction therewith, and in which like reference numerals are employed to indicate like parts in the various views:
Fig. 1 is a side elevational view of a spiral centralizer utilizing fasteners which embody the invention.
Fig. 2 is a View taken along the line 2--2 in Fig. l, in the direction of the arrows.
Fig. 3 is an enlarged detail of a hinge plate showing the manner of perforating before being doubled back to form the keeper member.
Fig. 4 is a view taken along the line 4-4 in Fig. 3, in the direction of the arrows.
Fig. 5 is an enlarged disassembled perspective view of the keeper members and pintle before being welded to the collar.
Fig. 6 is a sectional view taken along the line 6 6 in Fig. 2, in the direction of the arrows.
Fig. 7 is a sectional view taken through one of the fasteners utilizing a flat pintle.
Fig. 8 is a sectional view taken through one of 4 Claims. (Cl. .Z4-201) the keepers, designated by the numerals I5b and their ends.
2 the fasteners in which a pintle of circular cross section is used, so that the fastener serves as a hinge between the sections of the collar.
Referring to the drawings, at I0 is shown a casing such as is commonly used in oil Well production. On the casing is mounted a spiral centralizer, designated asa Whole by the numeral I I. The centralizer has an upper collar I2 and a lower collar I3 with spiral bands'or blades IllA extending between the collars and welded thereto at Collars I2 and I3 are split diametrically, as shown in Fig. 2, and to the abutting edges or extremities of the collars are welded keeper members i5 and I'6, best shown rin Fig. 5. The manner of welding the keeper member to the collars is shown in Figs. 7 and 8. It will be noted that the outer flanges of the hingeI or those portions designated by the numerals Ia and Ilia, are Welded to the outside of the collars, as shown at Il, while the shorter turned back portions of i519, respectively, are welded flush with the inside surface of the collar, as shown at I8.
In Fig. 3 is indicated the method of perforating the keeper plates shown at I5. The same keeper may be used on opposite sides of the engaging collar extremities by turning the keeper plate through 180 so that the bottom becomes the top. The perforations through the plates are so located that when the plates are doubled back,
` as shown in Fig. 5, the tab extensions or loops of oneplate register with the cutaway portions of theother so pintle I9 may be threaded therethrough to hold th'ecollar extremities together.
ln Fig. 8 a similar type of construction is shown in which a cylindrical pintle 20 is used in place of the flattened strip I9, shown in Fig. 7, so that the two sections of the collar are hinged together and can swing about the pintle as a pivot. In the bottom of the lowest doubled back portion of keeper member It is a retaining stop 2 I, shown in cross section in Fig. 6. This stop prevents the pintle from sliding downwardly through the loops and after the pintle has been dropped in place, one side of the upper loop of plate i5 is bent inwardly, as shown in Fig. 6, to prevent dislodgement oi' the pintle upwardly from the loops.
While in the drawings there is shown application of the fasteners only to a centralizer, it is contemplated as well that fasteners of a like construction may be used on the collars of scratchers. When so used it has been found necessary to have but a single fastener in the cylindrical collars since the collars are suiciently exible to permit deformation so they can be easily Wrapped about From the foregoing it will be seen that thisV invention is one well adapted to attain all of the ends and objects hereinabove set forth, Ato
gether with other advantages whichareeby-ions and which are inherent to the invention. As many possible embodiments may 'ma of the invention without departing from the scope thereof, it is to be understood that all matter set .forth in, the speciiica'tion or shownrin the drawings to. bein'terpretedk asL illustrative and not a sense,
It will be understood that certainl .features andu'bcombinations are o'f utility and, may be employed, without. reference 'to other features andy subcombina't'ions 'This is contemplated Iby and within the "scope of the claims.
AHaving 'thus described my invention, I claim:
`1..,A .'fasLtene-relement ofv the character described, comprising` a member having a plurality of .aligned vlperfo-rations..andhaving a flange portion extending along said periorations across oneside of .the .aligning edges ofi ther perforations andIhaving another flange. :extendinga'long said perforationsat 'the oppositeV side ci the ,peroraf tions, one of saidflangesbeing wider than the otherA flange, said vmember ha-ying are-entrant bend :across-said. periorations, the portions ot saidV member :between saidl perforations constituting aligned loops adaptedto .receiveapintle thenein, wherebysaid fastener element isadapted to be securedto, one 4end-fof a split collar of an oiltwellsrewhiegy0r sentarme-w01, or the like, witl-r the wider flangeofe -'said member voverlapping andweldedto theouter surface of the -theother flangefofgsaid .member abutv d. weld ed tot-he endvsur-face of. the cellar, with 11b -irillerY `Slirnfaefof Seid member ii-ush with the; nenA sur-face; of the-collar .and with ,said .loopsf fsaidmernbers spaced forwardly et; the endv ef the lbllakr.V
`2. A fastener offthecharacten describedcompris-ina,y in, combination, two-complementaryfas.-
tener elements, each of said elements having a plurality of aligned perforations and having a flange portion extending along said perforations across one side of the aligning edges of the perforations and having another flange extending along said perforations at the opposite side of the perforations, one of said flanges being wider' than the other flange, said member having a rte-entrant bend across`A said perforar-tions, with the portions ofsaid meniberV between `said perforations constituting aligned loops adapted to receive a pintle therein whereby said fastener element is adapted to be secured to one end of a splitcollar of an oil Well scratching or cen tering tool, yor the like, with the Wider flange of said member overlapping and welded to the Y outer surface of the collar and the other ange of said member abutting endwise and welded to the end surface of the collar with the inner surface of said member flush with the inner surfacejof; the collar-"and with said loops offisa-id member space-d forwardly-:of the endo'f the col@ lar, the loops of said-'members being staggered relatively to eachother whereby lthe "leopsoff-said members align withv eachother when the members are broughtv together, and a pintleremovably insertabl'e intoV the aligning loops ofv both members whereby th-efastening elements and the ends 'of the Icollar to which they are secured are releasably 'fasten-ed together;
3; A 'fastener 'assetforth in-cla-i-m 2, and whichv includes a rigid stopat the-bottom ci vthe lower most loop of the fasteneradapted to stop-and hold the pint-le against passing downwardly-out o'f -said loops.
4. Afas'ten'er vasset 'forthinclaim 3, in which the top of the upper loop bof the 'fastener deformable inwardly,v whereby -a pint-le buried within said loops is conned'against `upward displacement from said" loops.
JESSE E. HALL, SR.
References Gited the file of thisy patent UN-,IIED STATES PATENTS Num-"berk Name Date 11,638,466: Banks Aug. 9, 1927` 250059791 Mimes June '25, 1.935 2,145,336 Jan. 3l, 19.39 251972531 vSini-th Apr. 1'6, 1'940 2,222,381 Tennefos Nov. 19, 1%0 2,258;052v Hail Oct. x7, 1941
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US151456A US2666241A (en) | 1950-03-23 | 1950-03-23 | Band end connection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US151456A US2666241A (en) | 1950-03-23 | 1950-03-23 | Band end connection |
Publications (1)
Publication Number | Publication Date |
---|---|
US2666241A true US2666241A (en) | 1954-01-19 |
Family
ID=22538844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US151456A Expired - Lifetime US2666241A (en) | 1950-03-23 | 1950-03-23 | Band end connection |
Country Status (1)
Country | Link |
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US (1) | US2666241A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787037A (en) * | 1953-10-14 | 1957-04-02 | Guy T Hobbs | Corner bracket |
US3102308A (en) * | 1958-10-17 | 1963-09-03 | United Carr Fastener Corp | Fastener means for detachably securing two angularly disposed members to one another |
US3261064A (en) * | 1964-05-13 | 1966-07-19 | Turbyfill Charles William | Automatically adjusting connecting pin |
US3310343A (en) * | 1965-11-08 | 1967-03-21 | Knoll Associates | Furniture |
US3591866A (en) * | 1969-12-09 | 1971-07-13 | Lee Jensen | Adjustable band connection |
US3742557A (en) * | 1971-05-14 | 1973-07-03 | Uniroyal Inc | Hinge fastener for conveyor belts |
US3962754A (en) * | 1973-06-01 | 1976-06-15 | Mato Maschinen-Und Metallwarenfabrik Curt Matthaei Gmbh & Co. Kg | Plate connectors for belts |
US4619870A (en) * | 1983-03-16 | 1986-10-28 | Mitchell Norman J | Joining strip for panels |
US5437493A (en) * | 1993-07-20 | 1995-08-01 | Weisleder; Toni | Collapsible stroller tray |
US20030070803A1 (en) * | 2000-09-06 | 2003-04-17 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub and method |
US20040112592A1 (en) * | 2000-09-06 | 2004-06-17 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub |
US20040226714A1 (en) * | 2003-05-14 | 2004-11-18 | Rogers Henry E. | Limit clamp for use with casing attachments |
EP2828467A4 (en) * | 2012-03-20 | 2016-03-16 | Blackhawk Specialty Tools Llc | Well centralizer |
GB2530519A (en) * | 2014-09-24 | 2016-03-30 | Centek Ltd | Centralizer and Associated Devices |
US9664001B2 (en) | 2014-09-24 | 2017-05-30 | Centek Limited | Centralizer and associated devices |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1638466A (en) * | 1927-08-09 | A partnership | ||
US2005979A (en) * | 1934-07-14 | 1935-06-25 | Ayers Ltd | Drier felt for paper making machines |
US2145336A (en) * | 1937-03-27 | 1939-01-31 | Claud A Boyd | Rod guide |
US2197531A (en) * | 1938-01-12 | 1940-04-16 | Walter G L Smith | Drill pipe protector |
US2222381A (en) * | 1939-09-18 | 1940-11-19 | Jens P Tennefos | Hinged belt coupler |
US2258052A (en) * | 1940-01-15 | 1941-10-07 | Jesse E Hall | Spiral guide and tubing holder |
-
1950
- 1950-03-23 US US151456A patent/US2666241A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1638466A (en) * | 1927-08-09 | A partnership | ||
US2005979A (en) * | 1934-07-14 | 1935-06-25 | Ayers Ltd | Drier felt for paper making machines |
US2145336A (en) * | 1937-03-27 | 1939-01-31 | Claud A Boyd | Rod guide |
US2197531A (en) * | 1938-01-12 | 1940-04-16 | Walter G L Smith | Drill pipe protector |
US2222381A (en) * | 1939-09-18 | 1940-11-19 | Jens P Tennefos | Hinged belt coupler |
US2258052A (en) * | 1940-01-15 | 1941-10-07 | Jesse E Hall | Spiral guide and tubing holder |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2787037A (en) * | 1953-10-14 | 1957-04-02 | Guy T Hobbs | Corner bracket |
US3102308A (en) * | 1958-10-17 | 1963-09-03 | United Carr Fastener Corp | Fastener means for detachably securing two angularly disposed members to one another |
US3261064A (en) * | 1964-05-13 | 1966-07-19 | Turbyfill Charles William | Automatically adjusting connecting pin |
US3310343A (en) * | 1965-11-08 | 1967-03-21 | Knoll Associates | Furniture |
US3591866A (en) * | 1969-12-09 | 1971-07-13 | Lee Jensen | Adjustable band connection |
US3742557A (en) * | 1971-05-14 | 1973-07-03 | Uniroyal Inc | Hinge fastener for conveyor belts |
US3962754A (en) * | 1973-06-01 | 1976-06-15 | Mato Maschinen-Und Metallwarenfabrik Curt Matthaei Gmbh & Co. Kg | Plate connectors for belts |
US4619870A (en) * | 1983-03-16 | 1986-10-28 | Mitchell Norman J | Joining strip for panels |
US5437493A (en) * | 1993-07-20 | 1995-08-01 | Weisleder; Toni | Collapsible stroller tray |
US20040112592A1 (en) * | 2000-09-06 | 2004-06-17 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub |
US20030070803A1 (en) * | 2000-09-06 | 2003-04-17 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub and method |
US20050241822A1 (en) * | 2000-09-06 | 2005-11-03 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub and method |
US7140432B2 (en) | 2000-09-06 | 2006-11-28 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub and method |
US7156171B2 (en) | 2000-09-06 | 2007-01-02 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub |
US7182131B2 (en) | 2000-09-06 | 2007-02-27 | Casetech International, Inc. | Dual diameter and rotating centralizer/sub and method |
US20040226714A1 (en) * | 2003-05-14 | 2004-11-18 | Rogers Henry E. | Limit clamp for use with casing attachments |
US6957704B2 (en) | 2003-05-14 | 2005-10-25 | Halliburton Energy Services Inc. | Limit clamp for use with casing attachments |
EP2828467A4 (en) * | 2012-03-20 | 2016-03-16 | Blackhawk Specialty Tools Llc | Well centralizer |
GB2530519A (en) * | 2014-09-24 | 2016-03-30 | Centek Ltd | Centralizer and Associated Devices |
US9664001B2 (en) | 2014-09-24 | 2017-05-30 | Centek Limited | Centralizer and associated devices |
GB2530519B (en) * | 2014-09-24 | 2017-07-05 | Centek Ltd | Centralizer and Associated Devices |
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