US20190136645A1 - Stop collar device and method of positioning the device on a tubular member - Google Patents
Stop collar device and method of positioning the device on a tubular member Download PDFInfo
- Publication number
- US20190136645A1 US20190136645A1 US16/057,547 US201816057547A US2019136645A1 US 20190136645 A1 US20190136645 A1 US 20190136645A1 US 201816057547 A US201816057547 A US 201816057547A US 2019136645 A1 US2019136645 A1 US 2019136645A1
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- US
- United States
- Prior art keywords
- stop collar
- inner sleeve
- end rings
- collar assembly
- over
- 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.)
- Abandoned
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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
-
- 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
- E21B17/16—Drill collars
Definitions
- the present invention relates to the field of oil and gas production and, more particularly, to an apparatus for gripping devices on tubular members downhole. Still more particularly, the present invention discloses a stop collar assembly and a method of installing the same.
- stop collar assemblies downhole in oil and gas production operations are well known. Stop collars are used to position the various downhole tools about the casing and wellbore.
- stop collar assemblies were ring or hinged ring assemblies with a locking pin that is locked in place by set screws.
- set screws One disadvantage of the set screws is that they are point loading on the casing whereby corrosive spots maybe caused thereon.
- the holding force of the set screws are a weak point of the system.
- hinged rings are easy to break.
- a stop collar assembly and a method for installing the same are disclosed.
- the stop collar does not utilize screws, utilizes metal rings and provides a high holding force due to its compression type installation.
- a stop collar assembly and a method of installing it on a tubular member includes identical and symmetrically disposed over a tubular member two end rings and an inner sleeve disposed over the tubular member between the end rings.
- the inner sleeve includes a split section to facilitate the sliding of inner sleeve over the tubular member during installation and to provide a closeable gap when compression is applied on the exterior of the inner sleeve.
- one of the two end rings is slidingly received over the tubular member. Then, the inner sleeve is slidingly received over the tubular member followed by the second of the two end rings.
- the stop collar assembly is assembled by pressing on the exterior ends of the end rings to slide them towards each other over inner sleeve until they abut each other in the middle portion of the inner sleeve.
- the end rings advance towards each other, they apply pressure on the exterior surface of the inner sleeve to cause the inner sleeve to form a very tight and strong grip on the tubular member.
- the pressing on the exterior ends of the end rings to move them towards each other over the inner sleeve is done by a hydraulic tool.
- FIG. 1 is a three dimensional schematic of the stop collar of the present invention showing the stop collar in an unassembled position over a tubular member;
- FIG. 2 is a side view of the stop collar in the position depicted in FIG. 1 ;
- FIG. 3 is a three dimensional schematic of the stop collar of FIG. 1 showing the stop collar in a position over a tubular member prior to securely affixing it to the tubular member via compression;
- FIG. 4 is a side view of the stop collar in the position depicted in FIG. 3 ;
- FIG. 5 is a three dimensional schematic of the stop collar of FIG. 1 showing the stop collar in a fully compressed position over a tubular member when it is securely affixed to the tubular member via compression;
- FIG. 6 is a side view of the stop collar in the position depicted in FIG. 5 ;
- FIG. 7 is a three dimensional schematic of a hydraulic installation tool used to securely affix the stop collar assembly to the tubular member
- FIG. 8 is an exploded schematic view of the stop collar assembly of the present invention in the position depicted in FIG. 1 ;
- FIG. 9 is a schematic side view of the exploded schematic of the stop collar assembly depicted in FIG. 8 ;
- FIG. 10 is a schematic side view of the stop collar assembly of the present invention in the position depicted in FIG. 3 ;
- FIG. 11 is a three dimensional schematic view of the stop collar assembly of the present invention in the fully compressed position depicted in FIG. 5 ;
- FIG. 12 is a schematic side view of the stop collar assembly depicted in the position depicted in FIG. 11 .
- Stop collar assembly 10 includes identical and symmetrically disposed over casing 16 end rings 12 A and 12 B and an inner sleeve 14 disposed over casing 16 between end rings 12 A and 12 B.
- End rings 12 A and 12 B are made of strong metal material such as steel and are appropriately sized to slide over the exterior of inner sleeve 14 and to effect the desired compression on inner sleeve 14 as hereinafter described.
- Inner sleeve 14 is also constructed of metal material such as steel and it is appropriately sized to be intimately received over the exterior of casing 16 .
- Inner sleeve 14 includes a split section 18 to facilitate the sliding of inner sleeve 14 over casing 16 during installation and to provide a closeable gap when compression is applied on inner sleeve 14 .
- the inner surface of inner sleeve is preferably lined with rubber or other material suitable for increasing the gripping force of the stop collar assembly 10 on casing 16 when compression is applied on assembly 10 as hereinafter described.
- FIG. 2 there is shown a side view of stop collar assembly 10 in the unassembled position depicted in FIG. 1 having end rings 12 A and 12 B and inner sleeve 14 with split section 18 .
- one of the two end rings 12 A or 12 B is slidingly received over casing 16 .
- inner sleeve 14 is slidingly received over casing 16 followed by the second of the two end rings 12 A or 12 B.
- Inner sleeve 14 is positioned in the desired position over casing 16 .
- end rings 12 A and 12 B are secured to both sides of inner sleeve 14 so that they are anchored and perpendicular to the centerline of inner sleeve 14 .
- Split section 18 is shown in the unbiased position prior to the application of the compression force.
- FIG. 4 there is shown the side view of stop collar assembly 10 in the anchored position shown in FIG. 3 comprised of end rings 12 A and 12 B, and inner sleeve 14 having split section 18 .
- FIGS. 3 and 4 show end rings 12 A and 12 B as being over a substantial portion of inner sleeve 14 in the anchoring position, the schematic is an exaggeration to demonstrate the anchoring of the components prior to compression and that, in practice, only the beveled ends 22 A and 22 B of end rings 12 A and 12 B, respectively, which are shown and described in FIG. 9 below are over inner sleeve 14 .
- stop collar assembly 10 is assembled by pressing on the exterior ends of end rings 12 A and 12 B to slide them towards each other over inner sleeve 14 until they abut each other in the middle portion of inner sleeve 14 .
- end rings 12 A and 12 B advance towards each other, they apply pressure on the exterior surface of inner sleeve 14 to cause inner sleeve 14 to form a very tight and strong grip on casing 16 .
- the pressing on the exterior ends of end rings 12 A and 12 B to move them towards each other over inner sleeve 14 is effected by a hydraulic tool 30 (not shown in FIG. 5 but shown in FIG. 7 ).
- stop collar assembly 10 in the assembled position shown in FIG. 5 comprised of end rings 12 A and 12 B, and inner sleeve 14 .
- FIG. 7 there is shown a hydraulic tool 30 disposed over casing 16 that is used to apply pressure on the ends of end rings 12 A and 12 B to move them towards each other over inner sleeve 14 to cause sleeve 14 to form a tight strong grip with casing 16 .
- a hydraulic tool 30 disposed over casing 16 that is used to apply pressure on the ends of end rings 12 A and 12 B to move them towards each other over inner sleeve 14 to cause sleeve 14 to form a tight strong grip with casing 16 .
- stop collar assembly 10 Following the installation of stop collar assembly 10 on casing 16 , hydraulic tool 30 is removed. Then, a casing attachment is slidingly received over casing 10 and the process described above is repeated to install another stop collar assembly on the other side of the casing attachment so that the casing attachment is securely attached to casing 16 . It should be noted that in the case wherein the casing attachment is a centralizer, sufficient distance between the stop collar assemblies on either side thereof should be provided for the centralizer's expansion when collapsing.
- Casing 16 with stop collar assembly 10 and attachments is lowered downhole to conduct well known oil and gas production operations.
- Stop collar assembly 10 includes identical and symmetrically arranged end rings 12 A and 12 B and an inner sleeve having split section 18 .
- FIG. 9 there is shown a side view of stop collar assembly 10 in the unassembled position depicted in FIG. 8 having end rings 12 A and 12 B and inner sleeve 14 .
- End ring 12 A has a beveled end 22 A
- end ring 12 B has a beveled end 22 B.
- Beveled ends 22 A and 22 B are appropriately sized to accommodate the anchoring of end rings 12 A and 12 B to inner sleeve 14 .
- FIG. 10 there is shown a side view of stop collar assembly 10 showing the anchoring connection between end rings 12 A and 12 B with inner sleeve 14 prior to initiating the pressing on end rings 12 A and 12 B towards each other by hydraulic tool 30 (not shown) as described above.
- Beveled ends 22 A and 22 B of end rings 12 A and 12 B facilitate the initiation of the sliding motion of end rings 12 A and 12 B over inner sleeve 14 towards each other to cause the compression on the exterior of inner sleeve 14 and to create the tight grip on casing 16 .
- assembly 10 in its assembled position wherein end rings 12 A and 12 B have fully advanced towards each over inner sleeve so as to effect a tight grip on casing 16 (not shown).
- one ring can be used instead of the two end rings to practice the invention.
- the stop collar assembly is assembled by sliding the single ring over the sleeve to apply pressure on the exterior surface of the sleeve and to cause it to form a very tight and strong grip on the casing.
Abstract
A stop collar assembly includes an inner sleeve and two end rings. The stop collar assembly is received over a tubular member and is securely attached thereto by slidingly advancing the two end rings toward each other over the inner sleeve and applying a compression force on the exterior of the inner sleeve.
Description
- This application claims the benefit under 35 U.S.C. 119(e) of the U.S. provisional application No. 62/541,866 filed on Aug. 7, 2017.
- The present invention relates to the field of oil and gas production and, more particularly, to an apparatus for gripping devices on tubular members downhole. Still more particularly, the present invention discloses a stop collar assembly and a method of installing the same.
- The use of stop collar assemblies downhole in oil and gas production operations are well known. Stop collars are used to position the various downhole tools about the casing and wellbore. In the past, stop collar assemblies were ring or hinged ring assemblies with a locking pin that is locked in place by set screws. One disadvantage of the set screws is that they are point loading on the casing whereby corrosive spots maybe caused thereon. Another disadvantage is that the holding force of the set screws are a weak point of the system. Still another disadvantage is that hinged rings are easy to break.
- According to the present invention, a stop collar assembly and a method for installing the same are disclosed. The stop collar does not utilize screws, utilizes metal rings and provides a high holding force due to its compression type installation.
- These and other advantages of the present invention will become apparent from the following description.
- A stop collar assembly and a method of installing it on a tubular member is disclosed. The stop collar assembly includes identical and symmetrically disposed over a tubular member two end rings and an inner sleeve disposed over the tubular member between the end rings. The inner sleeve includes a split section to facilitate the sliding of inner sleeve over the tubular member during installation and to provide a closeable gap when compression is applied on the exterior of the inner sleeve.
- In installation, one of the two end rings is slidingly received over the tubular member. Then, the inner sleeve is slidingly received over the tubular member followed by the second of the two end rings.
- The stop collar assembly is assembled by pressing on the exterior ends of the end rings to slide them towards each other over inner sleeve until they abut each other in the middle portion of the inner sleeve. In the process, as the end rings advance towards each other, they apply pressure on the exterior surface of the inner sleeve to cause the inner sleeve to form a very tight and strong grip on the tubular member. The pressing on the exterior ends of the end rings to move them towards each other over the inner sleeve is done by a hydraulic tool.
- Following the installation of the stop collar assembly on the tubular member, an attachment is slidingly received over the tubular member and the process described above is repeated to install another stop collar assembly on the other side of the attachment so that the attachment is securely attached to the tubular member.
- For a more detailed description of the preferred embodiment of the invention, reference will now be made to the accompanying drawings, wherein:
-
FIG. 1 is a three dimensional schematic of the stop collar of the present invention showing the stop collar in an unassembled position over a tubular member; -
FIG. 2 is a side view of the stop collar in the position depicted inFIG. 1 ; -
FIG. 3 is a three dimensional schematic of the stop collar ofFIG. 1 showing the stop collar in a position over a tubular member prior to securely affixing it to the tubular member via compression; -
FIG. 4 is a side view of the stop collar in the position depicted inFIG. 3 ; -
FIG. 5 is a three dimensional schematic of the stop collar ofFIG. 1 showing the stop collar in a fully compressed position over a tubular member when it is securely affixed to the tubular member via compression; -
FIG. 6 is a side view of the stop collar in the position depicted inFIG. 5 ; -
FIG. 7 is a three dimensional schematic of a hydraulic installation tool used to securely affix the stop collar assembly to the tubular member; -
FIG. 8 is an exploded schematic view of the stop collar assembly of the present invention in the position depicted inFIG. 1 ; -
FIG. 9 is a schematic side view of the exploded schematic of the stop collar assembly depicted inFIG. 8 ; -
FIG. 10 is a schematic side view of the stop collar assembly of the present invention in the position depicted inFIG. 3 ; -
FIG. 11 is a three dimensional schematic view of the stop collar assembly of the present invention in the fully compressed position depicted inFIG. 5 ; and -
FIG. 12 is a schematic side view of the stop collar assembly depicted in the position depicted inFIG. 11 . - Referring now to
FIG. 1 , there is shown a three dimensional schematic of astop collar assembly 10 in an unassembled position disposed over acasing 16 used in oil and gas operations.Stop collar assembly 10 includes identical and symmetrically disposed overcasing 16end rings inner sleeve 14 disposed overcasing 16 betweenend rings End rings inner sleeve 14 and to effect the desired compression oninner sleeve 14 as hereinafter described.Inner sleeve 14 is also constructed of metal material such as steel and it is appropriately sized to be intimately received over the exterior ofcasing 16.Inner sleeve 14 includes asplit section 18 to facilitate the sliding ofinner sleeve 14 overcasing 16 during installation and to provide a closeable gap when compression is applied oninner sleeve 14. The inner surface of inner sleeve is preferably lined with rubber or other material suitable for increasing the gripping force of thestop collar assembly 10 oncasing 16 when compression is applied onassembly 10 as hereinafter described. - Referring now to
FIG. 2 , there is shown a side view ofstop collar assembly 10 in the unassembled position depicted inFIG. 1 havingend rings inner sleeve 14 withsplit section 18. - Referring back to
FIG. 1 , in order to installstop collar assembly 10 overcasing 16 one of the twoend rings casing 16. Then,inner sleeve 14 is slidingly received overcasing 16 followed by the second of the twoend rings Inner sleeve 14 is positioned in the desired position overcasing 16. - Referring now to
FIG. 3 , following the sliding engagement ofend rings inner sleeve 14 ofstop collar assembly 10 overcasing 16 described above,end rings inner sleeve 14 so that they are anchored and perpendicular to the centerline ofinner sleeve 14.Split section 18 is shown in the unbiased position prior to the application of the compression force. Referring now toFIG. 4 , there is shown the side view ofstop collar assembly 10 in the anchored position shown inFIG. 3 comprised ofend rings inner sleeve 14 havingsplit section 18. - It should be understood that although the schematics of
FIGS. 3 and 4 show end rings inner sleeve 14 in the anchoring position, the schematic is an exaggeration to demonstrate the anchoring of the components prior to compression and that, in practice, only thebeveled ends end rings FIG. 9 below are overinner sleeve 14. - Referring now to
FIG. 5 , stopcollar assembly 10 is assembled by pressing on the exterior ends ofend rings inner sleeve 14 until they abut each other in the middle portion ofinner sleeve 14. In the process, asend rings inner sleeve 14 to causeinner sleeve 14 to form a very tight and strong grip oncasing 16. The pressing on the exterior ends ofend rings inner sleeve 14 is effected by a hydraulic tool 30 (not shown inFIG. 5 but shown inFIG. 7 ). - Referring now to
FIG. 6 , there is shown the side view ofstop collar assembly 10 in the assembled position shown inFIG. 5 comprised ofend rings inner sleeve 14. - Referring now to
FIG. 7 , there is shown ahydraulic tool 30 disposed overcasing 16 that is used to apply pressure on the ends ofend rings inner sleeve 14 to causesleeve 14 to form a tight strong grip withcasing 16. It s hould be understood that although this embodiment is described in connection with the use of a hydraulic tool to apply pressure on the end rings, any other mechanical devices may be used to apply pressure on the end rings to advance them towards each other as described above to apply pressure on the middle sleeve. - Following the installation of
stop collar assembly 10 oncasing 16,hydraulic tool 30 is removed. Then, a casing attachment is slidingly received overcasing 10 and the process described above is repeated to install another stop collar assembly on the other side of the casing attachment so that the casing attachment is securely attached tocasing 16. It should be noted that in the case wherein the casing attachment is a centralizer, sufficient distance between the stop collar assemblies on either side thereof should be provided for the centralizer's expansion when collapsing. - Casing 16 with
stop collar assembly 10 and attachments is lowered downhole to conduct well known oil and gas production operations. - Referring now to
FIG. 8 , there is shown an enlarged exploded schematicstop collar assembly 10 in the unassembled position described in connection withFIG. 1 . Stopcollar assembly 10 includes identical and symmetrically arranged end rings 12A and 12B and an inner sleeve having splitsection 18. - Referring to
FIG. 9 , there is shown a side view ofstop collar assembly 10 in the unassembled position depicted inFIG. 8 having end rings 12A and 12 B andinner sleeve 14.End ring 12A has abeveled end 22A andend ring 12B has abeveled end 22B. Beveled ends 22A and 22B are appropriately sized to accommodate the anchoring of end rings 12A and 12B toinner sleeve 14. Referring now toFIG. 10 , there is shown a side view ofstop collar assembly 10 showing the anchoring connection between end rings 12A and 12B withinner sleeve 14 prior to initiating the pressing on end rings 12A and 12B towards each other by hydraulic tool 30 (not shown) as described above. Beveled ends 22A and 22B of end rings 12A and 12B, respectively, facilitate the initiation of the sliding motion of end rings 12A and 12B overinner sleeve 14 towards each other to cause the compression on the exterior ofinner sleeve 14 and to create the tight grip oncasing 16. - Referring now to
FIGS. 10 and 11 , there is shownassembly 10 in its assembled position wherein end rings 12A and 12B have fully advanced towards each over inner sleeve so as to effect a tight grip on casing 16 (not shown). - In an alternative embodiment, in accordance with the present invention, one ring can be used instead of the two end rings to practice the invention. In that embodiment, the stop collar assembly is assembled by sliding the single ring over the sleeve to apply pressure on the exterior surface of the sleeve and to cause it to form a very tight and strong grip on the casing.
- While the invention is described with respect to specific embodiments, modifications thereof can be made by one skilled in the art without departing from the spirit of the invention. The details of said embodiments are not to be construed as limitations except to the extent indicated in the following claims.
Claims (1)
1. A stop collar assembly, comprising:
a inner sleeve; and
a first end ring being slidingly receivable over the inner sleeve,
the inner sleeve and first end ring being appropriately sized so as cause the first end ring to apply a compression force on the inner sleeve when the first ring is received over the inner sleeve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/057,547 US20190136645A1 (en) | 2017-08-07 | 2018-08-07 | Stop collar device and method of positioning the device on a tubular member |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US201762541866P | 2017-08-07 | 2017-08-07 | |
US16/057,547 US20190136645A1 (en) | 2017-08-07 | 2018-08-07 | Stop collar device and method of positioning the device on a tubular member |
Publications (1)
Publication Number | Publication Date |
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US20190136645A1 true US20190136645A1 (en) | 2019-05-09 |
Family
ID=66326941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US16/057,547 Abandoned US20190136645A1 (en) | 2017-08-07 | 2018-08-07 | Stop collar device and method of positioning the device on a tubular member |
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US (1) | US20190136645A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100252274A1 (en) * | 2009-04-07 | 2010-10-07 | Frank's International, Inc. | Friction reducing wear band and method of coupling a wear band to a tubular |
US20100326671A1 (en) * | 2009-04-07 | 2010-12-30 | Frank's International, Inc. | Interference-fit stop collar and method of positioning a device on a tubular |
-
2018
- 2018-08-07 US US16/057,547 patent/US20190136645A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100252274A1 (en) * | 2009-04-07 | 2010-10-07 | Frank's International, Inc. | Friction reducing wear band and method of coupling a wear band to a tubular |
US20100326671A1 (en) * | 2009-04-07 | 2010-12-30 | Frank's International, Inc. | Interference-fit stop collar and method of positioning a device on a tubular |
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