US20150027704A1 - Packer end ring with device for gripping base pipe - Google Patents
Packer end ring with device for gripping base pipe Download PDFInfo
- Publication number
- US20150027704A1 US20150027704A1 US14/371,641 US201214371641A US2015027704A1 US 20150027704 A1 US20150027704 A1 US 20150027704A1 US 201214371641 A US201214371641 A US 201214371641A US 2015027704 A1 US2015027704 A1 US 2015027704A1
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- US
- United States
- Prior art keywords
- gripping device
- end ring
- packer
- base pipe
- gripping
- 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
Links
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- 230000004044 response Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 7
- 230000008961 swelling Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
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- 229930195733 hydrocarbon Natural products 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
-
- E21B2033/005—
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/01—Sealings characterised by their shape
Definitions
- This disclosure relates generally to equipment utilized and operations performed in conjunction with a subterranean well and, in one example described below, more particularly provides a packer end ring with a device for gripping a base pipe.
- Packers are used in wells to seal off annuli formed between tubular strings, or between a tubular string and another surface, such as a wall of a wellbore. It is important to construct packers so that they can reliably withstand substantial differential pressure, but it is also important to construct packers in an economical and expeditious manner.
- the packer can comprise an end ring positioned proximate a seal element on a base pipe, and a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe.
- the method can include: positioning an end ring on a base pipe proximate a seal element; and radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe. Radial compression of the gripping device results from longitudinal displacement of the gripping device relative to the end ring.
- a packer which can comprise an end ring positioned proximate a seal element on a base pipe, and a circular gripping device which encircles the base pipe and is compressed radially inward by a surface formed in the end ring.
- FIG. 1 is a representative cross-sectional view of a well system and associated method which can embody principles of this disclosure.
- FIG. 2 is an enlarged scale representative cross-sectional view of a packer which may be used in the system and method of FIG. 1 , and which can embody the principles of this disclosure.
- FIG. 3 is a further enlarged scale representative cross-sectional view of a portion of the packer.
- FIG. 4 is an end view of an end ring of the packer.
- FIG. 5 is a cross-sectional view of the end ring, taken along line 5 - 5 of FIG. 4 .
- FIG. 1 Representatively illustrated in FIG. 1 is a system 10 for use with a subterranean well, and an associated method, which can embody principles of this disclosure.
- system 10 and method are merely one example of an application of the principles of this disclosure in practice, and a wide variety of other examples are possible. Therefore, the scope of this disclosure is not limited at all to the details of the system 10 and method described herein and/or depicted in the drawings.
- a packer 12 is interconnected in a tubular string 14 and positioned in a wellbore 16 .
- the packer 12 includes a seal element 18 which extends radially outward into sealing engagement with the wellbore 16 , thereby sealing off an annulus 20 formed radially between the tubular string 14 and the wellbore 16 .
- the wellbore 16 is lined with casing 22 and cement 24 .
- the wellbore 16 could be uncased or open hole, in which case the seal element 18 could sealingly engage a wall 26 of an earth formation 28 penetrated by the wellbore 16 .
- the seal element 18 can comprise a swellable material which swells in response to contact with a particular fluid in the well.
- the term “swell” (and similar terms, such as, “swellable,” “swelling,” etc.) is used herein to indicate an increase in volume of a material.
- a seal element can expand outward without swelling (e.g., as in inflatable or compression-set packers, etc.). However, the seal element material itself increases in volume if the material is to be considered swollen.
- the swellable material swells when it is contacted with a particular swelling fluid (e.g., oil, gas, other hydrocarbons, water, etc.) in the well.
- a particular swelling fluid e.g., oil, gas, other hydrocarbons, water, etc.
- the swelling fluid may already be present in the well, or it may be introduced after installation of the packer 12 in the well, or it may be carried into the well with the packer, etc.
- the swellable material could instead swell in response to exposure to a particular temperature, or upon passage of a period of time, or in response to another stimulus, etc.
- End rings 30 longitudinally straddle the seal element 18 on a base pipe 32 , in order to restrict longitudinal displacement of the seal element on the base pipe. In most situations, it is desired for the end rings 30 to substantially prevent any displacement of the seal element 18 relative to the base pipe 32 , so that a desired differential pressure can be sealed against in the annulus 20 .
- the end rings 30 may directly abut opposite longitudinal ends of the seal element 18 as depicted in FIG. 1 .
- components such as backup rings, etc. may be interposed between the end rings 30 and the seal element 18 .
- seal elements 18 could be straddled by the end rings 30 , and an end ring could be positioned between a pair of seal elements.
- the scope of this disclosure is not limited at all to any of the details of the packer 12 , or seal element 18 , end rings 30 and base pipe 32 , as illustrated in the drawings or described herein.
- FIG. 2 an enlarged scale cross-sectional view of the packer 12 , apart from the remainder of the FIG. 1 system 10 , is representatively illustrated.
- the packer 12 could, however, be used in other systems and methods, in keeping with the scope of this disclosure.
- the seal element 18 comprises a swellable seal material 34 , and encircles the base pipe 32 .
- the base pipe 32 may be provided with end connectors (not shown) for interconnecting the packer 12 in the tubular string 14 .
- the end rings 30 are positioned at opposite ends of the seal element 18 .
- the end rings 30 can serve to protect the seal element 18 as the packer 12 is being conveyed into the wellbore 16 , as well as to prevent displacement of the seal element 18 relative to the base pipe 32 .
- a gripping device 36 is positioned in each of the end rings 30 .
- the gripping devices 36 secure the end rings 30 against longitudinal displacement relative to the base pipe 32 , so that the seal element 18 is also secured against longitudinal displacement relative to the base pipe.
- FIG. 3 A further enlarged scale cross-sectional view of a portion of the packer 12 is representatively illustrated in FIG. 3 . In this view, further details of the end ring 30 and gripping device 36 may be more clearly seen.
- the end ring 30 has a frusto-conical interior surface 38 formed therein.
- the surface 38 tapers radially inward in a direction toward the seal element 18 .
- the gripping device 36 also has a frusto-conical surface 40 formed thereon.
- the surface 40 complementarily engages the surface 38 , so that, if the gripping device 36 is displaced longitudinally toward the seal element 18 , the gripping device will be compressed radially inward. Conversely, if the end ring 30 is displaced longitudinally away from the seal element 18 , the gripping device 36 will be compressed radially inward by the cooperative action of the inclined surfaces 38 , 40 .
- At least one of the gripping device and end ring surfaces 40 , 38 can be provided with a friction reducing material to thereby reduce a biasing force required to displace the gripping device 36 longitudinally relative to the end ring 30 . This will increase the gripping engagement between the gripping device 36 and the base pipe 32 .
- Friction-reducing materials such as PTFE, ceramic coatings, etc., may be used, if desired.
- a gripping surface 42 in the gripping device engages and grips an external surface 44 on the base pipe 32 .
- the gripping surface 42 can have a coating, gripping particles, teeth, or any other treatment to enhance the gripping engagement between the surfaces 42 , 44 .
- the gripping device 36 When the gripping device 36 engages the external surface 44 on the base pipe 32 , the gripping device also closes off a radial gap between the end ring 30 and the base pipe. This can prevent extrusion of the seal element 18 through the gap, which can increase a differential pressure resisting capability of the packer 12 .
- end ring 30 and gripping device 36 are representatively illustrated, apart from the packer 12 .
- the end ring 30 and gripping device 36 may be used with packers other than the packer 12 , in keeping with the scope of this disclosure.
- threaded members 46 are threaded into the end ring 30 , in order to displace the gripping device 36 longitudinally relative to the end ring, thereby compressing the gripping device radially inward.
- the threaded members 46 are illustrated as comprising externally-threaded socket head set screws. However, any other type of threaded member(s) may be used, as desired, and it is not necessary in keeping with principles of this disclosure, for the threaded members to be used at all.
- the gripping device 36 could be biased relative to the end ring 30 by a biasing device (such as a spring, a swellable material, etc.).
- the gripping device 36 is annular shaped, so that it can encircle the base pipe 32 , but the gripping device has at least one longitudinal split 48 therein, allowing the gripping device to be compressed radially inward.
- the gripping device 36 may comprise a single circular segment which is resilient, so that it exerts an initial “bite” into the base pipe 32 when it is installed thereon.
- the gripping device 36 may comprise multiple circular segments which can readily conform to a misshaped (e.g., non-cylindrical, elliptical, rough, etc.) external surface 44 on the base pipe 32 .
- the end rings 30 and gripping devices 36 can effectively contain the seal element 18 on the base pipe 32 , while being economical to manufacture and convenient to install.
- the packer 12 can comprise an end ring 30 positioned proximate a seal element 18 on a base pipe 32 , and a gripping device 36 which is compressed radially inward by a surface 38 formed in the end ring 30 .
- the surface 38 encircles the base pipe 32 .
- the surface 38 may be a frusto-conical surface.
- the gripping device 36 may grip the base pipe 32 in response to longitudinal displacement of the gripping device 36 relative to the surface 38 .
- the seal element 18 can include a swellable material 34 which swells in response to contact with a fluid.
- the gripping device 36 may close off a gap formed radially between the base pipe 32 and the end ring 30 .
- the gripping device 36 can comprise a circular segment having a split 48 therein which permits radial compression of the circular segment.
- the gripping device 36 can comprise multiple circular segments.
- a gripping surface 42 may be formed on the gripping device 36 .
- At least one member 46 may thread into the end ring 30 and thereby radially compress the gripping device 36 .
- the gripping device 36 may include a surface 40 which cooperatively engages the end ring surface 38 , and at least one of the gripping device and end ring surfaces 40 , 38 can be provided with a friction reducing material.
- a method of constructing a packer 12 is also described above.
- the method can include: positioning an end ring 30 on a base pipe 32 proximate a seal element 18 , and radially compressing a gripping device 36 in the end ring 30 , so that the gripping device 36 grips the base pipe 32 . Radial compression of the gripping device 36 results from longitudinal displacement of the gripping device 36 relative to the end ring 30 .
- a packer 12 example described above can comprise an end ring 30 positioned proximate a seal element 18 on a base pipe 32 , and a circular gripping device 36 which encircles the base pipe 32 and is compressed radially inward by a surface 38 formed in the end ring 30 .
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
- Earth Drilling (AREA)
Abstract
A packer can include an end ring positioned proximate a seal element on a base pipe, and a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe. A method of constructing a packer can include positioning an end ring on a base pipe proximate a seal element, and radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe, radial compression of the gripping device resulting from longitudinal displacement of the gripping device relative to the end ring.
Description
- This disclosure relates generally to equipment utilized and operations performed in conjunction with a subterranean well and, in one example described below, more particularly provides a packer end ring with a device for gripping a base pipe.
- Packers are used in wells to seal off annuli formed between tubular strings, or between a tubular string and another surface, such as a wall of a wellbore. It is important to construct packers so that they can reliably withstand substantial differential pressure, but it is also important to construct packers in an economical and expeditious manner.
- Therefore, it will be appreciated that improvements are continually needed in the art of constructing packers for use in wells.
- In this disclosure, systems and methods are provided which bring improvements to the art of constructing packers. An example is described below in which a gripping device is contained in an end ring, so that the gripping device grips a base pipe and prevents longitudinal displacement of a seal element relative to the base pipe.
- An improved packer is provided to the art in the disclosure below. In one example, the packer can comprise an end ring positioned proximate a seal element on a base pipe, and a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe.
- Also described below is a method of constructing a packer. In one example, the method can include: positioning an end ring on a base pipe proximate a seal element; and radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe. Radial compression of the gripping device results from longitudinal displacement of the gripping device relative to the end ring.
- Also described below is a packer which can comprise an end ring positioned proximate a seal element on a base pipe, and a circular gripping device which encircles the base pipe and is compressed radially inward by a surface formed in the end ring.
- These and other features, advantages and benefits will become apparent to one of ordinary skill in the art upon careful consideration of the detailed description of representative embodiments of the disclosure below and the accompanying drawings, in which similar elements are indicated in the various figures using the same reference numbers.
-
FIG. 1 is a representative cross-sectional view of a well system and associated method which can embody principles of this disclosure. -
FIG. 2 is an enlarged scale representative cross-sectional view of a packer which may be used in the system and method ofFIG. 1 , and which can embody the principles of this disclosure. -
FIG. 3 is a further enlarged scale representative cross-sectional view of a portion of the packer. -
FIG. 4 is an end view of an end ring of the packer. -
FIG. 5 is a cross-sectional view of the end ring, taken along line 5-5 ofFIG. 4 . - Representatively illustrated in
FIG. 1 is asystem 10 for use with a subterranean well, and an associated method, which can embody principles of this disclosure. However, it should be clearly understood that thesystem 10 and method are merely one example of an application of the principles of this disclosure in practice, and a wide variety of other examples are possible. Therefore, the scope of this disclosure is not limited at all to the details of thesystem 10 and method described herein and/or depicted in the drawings. - In the
FIG. 1 example, apacker 12 is interconnected in atubular string 14 and positioned in awellbore 16. Thepacker 12 includes aseal element 18 which extends radially outward into sealing engagement with thewellbore 16, thereby sealing off anannulus 20 formed radially between thetubular string 14 and thewellbore 16. - In this example, the
wellbore 16 is lined withcasing 22 andcement 24. In other examples, thewellbore 16 could be uncased or open hole, in which case theseal element 18 could sealingly engage awall 26 of anearth formation 28 penetrated by thewellbore 16. - The
seal element 18 can comprise a swellable material which swells in response to contact with a particular fluid in the well. The term “swell” (and similar terms, such as, “swellable,” “swelling,” etc.) is used herein to indicate an increase in volume of a material. A seal element can expand outward without swelling (e.g., as in inflatable or compression-set packers, etc.). However, the seal element material itself increases in volume if the material is to be considered swollen. - Preferably, the swellable material swells when it is contacted with a particular swelling fluid (e.g., oil, gas, other hydrocarbons, water, etc.) in the well. The swelling fluid may already be present in the well, or it may be introduced after installation of the
packer 12 in the well, or it may be carried into the well with the packer, etc. The swellable material could instead swell in response to exposure to a particular temperature, or upon passage of a period of time, or in response to another stimulus, etc. -
End rings 30 longitudinally straddle theseal element 18 on abase pipe 32, in order to restrict longitudinal displacement of the seal element on the base pipe. In most situations, it is desired for theend rings 30 to substantially prevent any displacement of theseal element 18 relative to thebase pipe 32, so that a desired differential pressure can be sealed against in theannulus 20. - The
end rings 30 may directly abut opposite longitudinal ends of theseal element 18 as depicted inFIG. 1 . In other examples, components such as backup rings, etc. may be interposed between theend rings 30 and theseal element 18. - In further examples,
multiple seal elements 18 could be straddled by theend rings 30, and an end ring could be positioned between a pair of seal elements. Thus, it should be clearly understood that the scope of this disclosure is not limited at all to any of the details of thepacker 12, orseal element 18,end rings 30 andbase pipe 32, as illustrated in the drawings or described herein. - Referring additionally now to
FIG. 2 , an enlarged scale cross-sectional view of thepacker 12, apart from the remainder of theFIG. 1 system 10, is representatively illustrated. Thepacker 12 could, however, be used in other systems and methods, in keeping with the scope of this disclosure. - In this view, it may be seen that the
seal element 18 comprises aswellable seal material 34, and encircles thebase pipe 32. Thebase pipe 32 may be provided with end connectors (not shown) for interconnecting thepacker 12 in thetubular string 14. - The
end rings 30 are positioned at opposite ends of theseal element 18. Theend rings 30 can serve to protect theseal element 18 as thepacker 12 is being conveyed into thewellbore 16, as well as to prevent displacement of theseal element 18 relative to thebase pipe 32. - In the
FIG. 2 example, agripping device 36 is positioned in each of theend rings 30. Thegripping devices 36 secure theend rings 30 against longitudinal displacement relative to thebase pipe 32, so that theseal element 18 is also secured against longitudinal displacement relative to the base pipe. - A further enlarged scale cross-sectional view of a portion of the
packer 12 is representatively illustrated inFIG. 3 . In this view, further details of theend ring 30 and grippingdevice 36 may be more clearly seen. - The
end ring 30 has a frusto-conical interior surface 38 formed therein. Thesurface 38 tapers radially inward in a direction toward theseal element 18. - The
gripping device 36 also has a frusto-conical surface 40 formed thereon. Thesurface 40 complementarily engages thesurface 38, so that, if thegripping device 36 is displaced longitudinally toward theseal element 18, the gripping device will be compressed radially inward. Conversely, if theend ring 30 is displaced longitudinally away from theseal element 18, thegripping device 36 will be compressed radially inward by the cooperative action of theinclined surfaces - Note that it is not necessary for the
surfaces gripping device 36 may be used, in keeping with the scope of this disclosure. - At least one of the gripping device and
end ring surfaces gripping device 36 longitudinally relative to theend ring 30. This will increase the gripping engagement between thegripping device 36 and thebase pipe 32. Friction-reducing materials such as PTFE, ceramic coatings, etc., may be used, if desired. - When the
gripping device 36 is radially compressed, agripping surface 42 in the gripping device engages and grips anexternal surface 44 on thebase pipe 32. The grippingsurface 42 can have a coating, gripping particles, teeth, or any other treatment to enhance the gripping engagement between thesurfaces - When the
gripping device 36 engages theexternal surface 44 on thebase pipe 32, the gripping device also closes off a radial gap between theend ring 30 and the base pipe. This can prevent extrusion of theseal element 18 through the gap, which can increase a differential pressure resisting capability of thepacker 12. - Referring additionally now to
FIGS. 4 & 5 , theend ring 30 andgripping device 36 are representatively illustrated, apart from thepacker 12. Theend ring 30 andgripping device 36 may be used with packers other than thepacker 12, in keeping with the scope of this disclosure. - In these views it may be more clearly seen that threaded
members 46 are threaded into theend ring 30, in order to displace thegripping device 36 longitudinally relative to the end ring, thereby compressing the gripping device radially inward. - Although ten of the threaded
members 46 are depicted inFIG. 4 , any number may be used, as desired. As another example, a single ring-shaped threaded member could be threaded into the end of theend ring 30 to displace the gripping device longitudinally relative to the end ring. Thus, it should be understood that the scope of this disclosure is not limited at all to the details of theend ring 30, grippingdevice 36 or threadedmembers 46 as depicted in the drawings or described herein. - The threaded
members 46 are illustrated as comprising externally-threaded socket head set screws. However, any other type of threaded member(s) may be used, as desired, and it is not necessary in keeping with principles of this disclosure, for the threaded members to be used at all. For example, the grippingdevice 36 could be biased relative to theend ring 30 by a biasing device (such as a spring, a swellable material, etc.). - In the
FIG. 5 example, the grippingdevice 36 is annular shaped, so that it can encircle thebase pipe 32, but the gripping device has at least onelongitudinal split 48 therein, allowing the gripping device to be compressed radially inward. If one split 48 is used, the grippingdevice 36 may comprise a single circular segment which is resilient, so that it exerts an initial “bite” into thebase pipe 32 when it is installed thereon. If multiple splits 48 are used, the grippingdevice 36 may comprise multiple circular segments which can readily conform to a misshaped (e.g., non-cylindrical, elliptical, rough, etc.)external surface 44 on thebase pipe 32. - It may now be fully appreciated that the above disclosure provides significant advances to the art of constructing packers for use with a well. In examples described above, the end rings 30 and
gripping devices 36 can effectively contain theseal element 18 on thebase pipe 32, while being economical to manufacture and convenient to install. - The above disclosure provides to the art an
improved packer 12. In one example, thepacker 12 can comprise anend ring 30 positioned proximate aseal element 18 on abase pipe 32, and agripping device 36 which is compressed radially inward by asurface 38 formed in theend ring 30. Thesurface 38 encircles thebase pipe 32. - The
surface 38 may be a frusto-conical surface. Thegripping device 36 may grip thebase pipe 32 in response to longitudinal displacement of thegripping device 36 relative to thesurface 38. - The
seal element 18 can include aswellable material 34 which swells in response to contact with a fluid. - The
gripping device 36 may close off a gap formed radially between thebase pipe 32 and theend ring 30. - The
gripping device 36 can comprise a circular segment having asplit 48 therein which permits radial compression of the circular segment. Thegripping device 36 can comprise multiple circular segments. - A gripping
surface 42 may be formed on thegripping device 36. At least onemember 46 may thread into theend ring 30 and thereby radially compress thegripping device 36. - The
gripping device 36 may include asurface 40 which cooperatively engages theend ring surface 38, and at least one of the gripping device and end ring surfaces 40, 38 can be provided with a friction reducing material. - A method of constructing a
packer 12 is also described above. In one example, the method can include: positioning anend ring 30 on abase pipe 32 proximate aseal element 18, and radially compressing agripping device 36 in theend ring 30, so that thegripping device 36 grips thebase pipe 32. Radial compression of thegripping device 36 results from longitudinal displacement of thegripping device 36 relative to theend ring 30. - A
packer 12 example described above can comprise anend ring 30 positioned proximate aseal element 18 on abase pipe 32, and a circulargripping device 36 which encircles thebase pipe 32 and is compressed radially inward by asurface 38 formed in theend ring 30. - Although various examples have been described above, with each example having certain features, it should be understood that it is not necessary for a particular feature of one example to be used exclusively with that example. Instead, any of the features described above and/or depicted in the drawings can be combined with any of the examples, in addition to or in substitution for any of the other features of those examples. One example's features are not mutually exclusive to another example's features. Instead, the scope of this disclosure encompasses any combination of any of the features.
- Although each example described above includes a certain combination of features, it should be understood that it is not necessary for all features of an example to be used. Instead, any of the features described above can be used, without any other particular feature or features also being used.
- It should be understood that the various embodiments described herein may be utilized in various orientations, such as inclined, inverted, horizontal, vertical, etc., and in various configurations, without departing from the principles of this disclosure. The embodiments are described merely as examples of useful applications of the principles of the disclosure, which is not limited to any specific details of these embodiments.
- In the above description of the representative examples, directional terms (such as “above,” “below,” “upper,” “lower,” etc.) are used for convenience in referring to the accompanying drawings. However, it should be clearly understood that the scope of this disclosure is not limited to any particular directions described herein.
- The terms “including,” “includes,” “comprising,” “comprises,” and similar terms are used in a non-limiting sense in this specification. For example, if a system, method, apparatus, device, etc., is described as “including” a certain feature or element, the system, method, apparatus, device, etc., can include that feature or element, and can also include other features or elements. Similarly, the term “comprises” is considered to mean “comprises, but is not limited to.”
- Of course, a person skilled in the art would, upon a careful consideration of the above description of representative embodiments of the disclosure, readily appreciate that many modifications, additions, substitutions, deletions, and other changes may be made to the specific embodiments, and such changes are contemplated by the principles of this disclosure. For example, structures disclosed as being separately formed can, in other examples, be integrally formed and vice versa. Accordingly, the foregoing detailed description is to be clearly understood as being given by way of illustration and example only, the spirit and scope of the invention being limited solely by the appended claims and their equivalents.
Claims (30)
1. A packer, comprising:
an end ring positioned proximate a seal element on a base pipe; and
a circular gripping device which encircles the base pipe and is compressed radially inward by a surface formed in the end ring.
2. The packer of claim 1 , wherein the surface comprises a frusto-conical surface.
3. The packer of claim 1 , wherein the gripping device grips the base pipe in response to longitudinal displacement of the gripping device relative to the surface.
4. The packer of claim 1 , wherein the seal element comprises a swellable material which swells in response to contact with a fluid.
5. The packer of claim 1 , wherein the gripping device closes off a gap formed radially between the base pipe and the end ring.
6. The packer of claim 1 , wherein the gripping device comprises a circular segment having a split therein which permits radial compression of the circular segment.
7. The packer of claim 1 , wherein the gripping device comprises multiple circular segments.
8. The packer of claim 1 , further comprising a gripping surface formed on the gripping device.
9. The packer of claim 1 , further comprising at least one member which threads into the end ring and thereby radially compresses the gripping device.
10. The packer of claim 1 , wherein the gripping device comprises a surface which cooperatively engages the end ring surface, and wherein at least one of the gripping device and end ring surfaces is provided with a friction reducing material.
11. A method of constructing a packer, the method comprising:
positioning an end ring on a base pipe proximate a seal element; and
radially compressing a gripping device in the end ring, so that the gripping device grips the base pipe, radial compression of the gripping device resulting from longitudinal displacement of the gripping device relative to the end ring.
12. The method of claim 11 , further comprising the seal element swelling in response to contact with a fluid in a well.
13. The method of claim 11 , further comprising the gripping device closing off a gap formed radially between the base pipe and the end ring.
14. The method of claim 11 , wherein the gripping device comprises a circular segment having a split therein which permits radial compression of the circular segment.
15. The method of claim 11 , wherein the gripping device comprises multiple circular segments.
16. The method of claim 11 , wherein a gripping surface is formed on the gripping device, and wherein the radially compressing comprises engaging the gripping surface with the base pipe.
17. The method of claim 11 , wherein the radially compressing further comprises threading at least one member into the end ring, thereby radially compressing the gripping device.
18. The method of claim 11 , wherein the radially compressing further comprises the gripping device being compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe.
19. The method of claim 18 , wherein the surface comprises a frusto-conical surface.
20. The method of claim 18 , wherein the gripping device comprises a surface which cooperatively engages the end ring surface, and wherein at least one of the gripping device and end ring surfaces is provided with a friction reducing material.
21. A packer, comprising:
an end ring positioned proximate a seal element on a base pipe; and
a gripping device which is compressed radially inward by a surface formed in the end ring, the surface encircling the base pipe.
22. The packer of claim 21 , wherein the surface comprises a frusto-conical surface.
23. The packer of claim 21 , wherein the gripping device grips the base pipe in response to longitudinal displacement of the gripping device relative to the surface.
24. The packer of claim 21 , wherein the seal element comprises a swellable material which swells in response to contact with a fluid.
25. The packer of claim 21 , wherein the gripping device closes off a gap formed radially between the base pipe and the end ring.
26. The packer of claim 21 , wherein the gripping device comprises a circular segment having a split therein which permits radial compression of the circular segment.
27. The packer of claim 21 , wherein the gripping device comprises multiple circular segments.
28. The packer of claim 21 , further comprising a gripping surface formed on the gripping device.
29. The packer of claim 21 , further comprising at least one member which threads into the end ring and thereby radially compresses the gripping device.
30. The packer of claim 21 , wherein the gripping device comprises a surface which cooperatively engages the end ring surface, and wherein at least one of the gripping device and end ring surfaces is provided with a friction reducing material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2012/000384 WO2013128220A1 (en) | 2012-03-01 | 2012-03-01 | Packer end ring with device for gripping base pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150027704A1 true US20150027704A1 (en) | 2015-01-29 |
Family
ID=49081702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/371,641 Abandoned US20150027704A1 (en) | 2012-03-01 | 2012-03-01 | Packer end ring with device for gripping base pipe |
Country Status (2)
Country | Link |
---|---|
US (1) | US20150027704A1 (en) |
WO (1) | WO2013128220A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160115762A1 (en) * | 2014-10-27 | 2016-04-28 | Tier 1 Energy Solutions Inc. | Downhole packer |
US20160177660A1 (en) * | 2014-12-19 | 2016-06-23 | Isolation Technologies LLC | Packer |
KR102340892B1 (en) | 2021-02-26 | 2021-12-17 | 엔스펙트라 주식회사 | Charged Quantum Dots Microcapsule and Method of Manufacturing the Same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3818987A (en) * | 1972-11-17 | 1974-06-25 | Dresser Ind | Well packer and retriever |
US4407514A (en) * | 1982-12-27 | 1983-10-04 | Acf Industries, Incorporated | Wellhead casing packing support |
GB201004045D0 (en) * | 2010-03-11 | 2010-04-28 | Tendeka Bv | Fully bonded end rings |
-
2012
- 2012-03-01 US US14/371,641 patent/US20150027704A1/en not_active Abandoned
- 2012-03-01 WO PCT/IB2012/000384 patent/WO2013128220A1/en active Application Filing
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160115762A1 (en) * | 2014-10-27 | 2016-04-28 | Tier 1 Energy Solutions Inc. | Downhole packer |
US9739112B2 (en) * | 2014-10-27 | 2017-08-22 | Tier 1 Energy Solutions Inc. | Downhole packer |
US20160177660A1 (en) * | 2014-12-19 | 2016-06-23 | Isolation Technologies LLC | Packer |
KR102340892B1 (en) | 2021-02-26 | 2021-12-17 | 엔스펙트라 주식회사 | Charged Quantum Dots Microcapsule and Method of Manufacturing the Same |
KR102437999B1 (en) | 2021-02-26 | 2022-08-30 | 엔스펙트라 주식회사 | Charged Quantum Dots Microcapsule Film |
KR102437991B1 (en) | 2021-02-26 | 2022-08-30 | 엔스펙트라 주식회사 | Charged Quantum Dots Microcapsule Film |
Also Published As
Publication number | Publication date |
---|---|
WO2013128220A1 (en) | 2013-09-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HALLIBURTON ENERGY SERVICES, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ANDERSEN, KRISTIAN;EASY WELL SOLUTIONS AS;SIGNING DATES FROM 20120430 TO 20120530;REEL/FRAME:033289/0366 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |