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WO2013085662A1 - Treatment plug and method of anchoring a treatment plug and then removing a portion thereof - Google Patents

Treatment plug and method of anchoring a treatment plug and then removing a portion thereof Download PDF

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Publication number
WO2013085662A1
WO2013085662A1 PCT/US2012/064032 US2012064032W WO2013085662A1 WO 2013085662 A1 WO2013085662 A1 WO 2013085662A1 US 2012064032 W US2012064032 W US 2012064032W WO 2013085662 A1 WO2013085662 A1 WO 2013085662A1
Authority
WO
WIPO (PCT)
Prior art keywords
plug
treatment
metal tubular
composite
treatment plug
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.)
Ceased
Application number
PCT/US2012/064032
Other languages
French (fr)
Inventor
Richard Yingqing Xu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of WO2013085662A1 publication Critical patent/WO2013085662A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
    • 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
    • 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
    • E21B33/1294—Packers; Plugs with mechanical slips for hooking into the casing characterised by a valve, e.g. a by-pass valve
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like

Definitions

  • Tubular systems such as those used in the completion and carbon dioxide sequestration industries often employ anchors to positionally fix one tubular to another tubular.
  • existing anchoring systems serve the function for which they are intended, the industry is always receptive to new systems and methods for anchoring tubulars.
  • the treatment plug includes, a metal tubular expandable into sealing and anchoring engagement with a surrounding structure, the metal tubular having a shoulder at an inner radial surface thereof, and a composite plug sealable with the metal tubular and anchorable to the shoulder.
  • the method includes, positioning the treatment plug having a metal tubular with a shoulder engaged with a composite plug within a structure, swaging the metal tubular into sealing and anchoring engagement with the structure, plugging the composite plug, performing a treating operation, and drilling out the composite plug.
  • FIG. 1 depicts a cross sectional view of a treatment plug disclosed herein within a borehole in an earth formation
  • FIG. 2 depicts a cross sectional view of a portion of the treatment plug of FIG.
  • the treatment plug 10 includes, a metal tubular 14 with a shoulder 18 at an inner radial surface 22 thereof, and a composite plug 26 sealable with the metal tubular 14 and anchorable to the shoulder 18.
  • the metal tubular is sealingly and anchorably attachable to a structure 30, shown herein as a borehole in an earth formation 34 in response to the metal tubular 14 being radially expanded.
  • the treatment plug 10 can include a seal 38, such as polymeric sleeve, for example to aid in sealing the metal tubular 14 to the structure 30.
  • one or more slips 42 can be positioned radially outwardly of the metal tubular 14 to facilitate anchoring engagement of the treatment plug 10 to the structure 30.
  • the composite plug 26 of the embodiment illustrated herein has a composite lower ring 46 and composite bottom 66 that abut opposing sides of the shoulder 18 to anchor the composite plug 26 to the metal tubular 14.
  • a seal 50 made of a polymer such as rubber, for example, is compressible between the composite lower ring 46 and a composite upper ring 54. Compression of the seal 50 causes radial expansion thereof and subsequent sealing engagement to both the inner radial surface 22 of the metal tubular 14 and a surface 58 of a composite mandrel 62.
  • the mandrel 62 is attached to the composite bottom 66 and a sleeve 64 while the lower ring 46, the seal 50, and the upper ring 54 are able to move relative to the mandrel 62.
  • the attachment of the mandrel 62 to these components is sufficiently strong to prevent detachment while pulling on the mandrel 62 relative to the metal tubular 14 during swaging of the metal tubular 14 and during pushing on the mandrel 62 relative to the metal tubular 14 during treating operations such as fracing of the earth formation 34, for example.
  • a setting tool 74 is operationally attachable to the composite plug 26, for example, through releasable engagement of a collet (not shown) on a sleeve 78 of the setting tool 74 to the composite mandrel 62.
  • This attachment allows a swage 82 of the setting tool 74 to move relative to the sleeve 78 and the metal tubular 14 connected thereto. Movement of the swage 82 causes radial expansion of the metal tubular 14 thereby radially expanding the seal 38 into sealing engagement with the structure 30 and radially expanding the slips 42 into anchoring engagement with the structure 30.
  • the setting tool 74 is retrievable, perhaps to surface, after detaching from the composite plug 26.
  • the treatment plug 10 is set to receive a plug 86, illustrated herein as a ball, seatable against a seat 90 on the composite mandrel 62.
  • the plug 86 can also be made of composite material to facilitate later removal by drilling or milling with the rest of the components that make up the composite plug 26.
  • the composite plug 26 is attached to the metal tubular 14 with sufficient strength, and the metal tubular 14 is anchored to the structure 30 with sufficient strength to prevent relative movement between these parts during pressuring up against the composite plug 26 while plugged with the plug 86 during a treating operation such as a fracing operation or a pressure actuating event, for example.
  • the composite plug 26 and the plug 86 are removable by machining them via a drilling or milling operation.
  • the treatment plug 10 is configured such that once the composite plug 26 portion has been removed a relatively large through bore 94 of the metal tubular 14, is the only restriction that remains within the structure 30.
  • the through bore 94 can be configured so that a radial dimension 98 thereof is greater than 80 percent of a greatest radial dimension 102 of the treatment plug 10 after it has been set. This large radial dimension 98 allows flow through the through bore 94 for production of hydrocarbons, for example, with little restriction.
  • a plurality of the treatment plugs 10 can be employed within a single one of the structures 30 and all of the treatment plugs 10 can subsequently be drilled out thereby leaving little restriction to flow

Landscapes

  • 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)
  • Piles And Underground Anchors (AREA)

Abstract

A treatment plug includes, a metal tubular expandable into sealing and anchoring engagement with a surrounding structure, the metal tubular having a shoulder at an inner radial surface thereof, and a composite plug sealable with the metal tubular and anchorable to the shoulder.

Description

TREATMENT PLUG AND METHOD OF ANCHORING A TREATMENT PLUG AND THEN REMOVING A PORTION THEREOF
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Application No. 13/314646, filed on December 8, 2011, which is incorporated herein by reference in its entirety.
BACKGROUND
[0002] Tubular systems, such as those used in the completion and carbon dioxide sequestration industries often employ anchors to positionally fix one tubular to another tubular. Although existing anchoring systems serve the function for which they are intended, the industry is always receptive to new systems and methods for anchoring tubulars.
BRIEF DESCRIPTION
[0003] Disclosed herein is a treatment plug. The treatment plug includes, a metal tubular expandable into sealing and anchoring engagement with a surrounding structure, the metal tubular having a shoulder at an inner radial surface thereof, and a composite plug sealable with the metal tubular and anchorable to the shoulder.
[0004] Further disclosed herein is a method of anchoring a treatment plug and then removing a portion thereof. The method includes, positioning the treatment plug having a metal tubular with a shoulder engaged with a composite plug within a structure, swaging the metal tubular into sealing and anchoring engagement with the structure, plugging the composite plug, performing a treating operation, and drilling out the composite plug.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
[0006] FIG. 1 depicts a cross sectional view of a treatment plug disclosed herein within a borehole in an earth formation; and
[0007] FIG. 2 depicts a cross sectional view of a portion of the treatment plug of FIG.
1. DETAILED DESCRIPTION
[0008] A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
[0009] Referring to Figure 1, an embodiment of a treatment plug disclosed herein is illustrated at 10. The treatment plug 10 includes, a metal tubular 14 with a shoulder 18 at an inner radial surface 22 thereof, and a composite plug 26 sealable with the metal tubular 14 and anchorable to the shoulder 18. The metal tubular is sealingly and anchorably attachable to a structure 30, shown herein as a borehole in an earth formation 34 in response to the metal tubular 14 being radially expanded. The treatment plug 10 can include a seal 38, such as polymeric sleeve, for example to aid in sealing the metal tubular 14 to the structure 30.
Additionally, one or more slips 42 can be positioned radially outwardly of the metal tubular 14 to facilitate anchoring engagement of the treatment plug 10 to the structure 30.
[0010] The composite plug 26 of the embodiment illustrated herein has a composite lower ring 46 and composite bottom 66 that abut opposing sides of the shoulder 18 to anchor the composite plug 26 to the metal tubular 14. A seal 50, made of a polymer such as rubber, for example, is compressible between the composite lower ring 46 and a composite upper ring 54. Compression of the seal 50 causes radial expansion thereof and subsequent sealing engagement to both the inner radial surface 22 of the metal tubular 14 and a surface 58 of a composite mandrel 62. The mandrel 62 is attached to the composite bottom 66 and a sleeve 64 while the lower ring 46, the seal 50, and the upper ring 54 are able to move relative to the mandrel 62. The attachment of the mandrel 62 to these components is sufficiently strong to prevent detachment while pulling on the mandrel 62 relative to the metal tubular 14 during swaging of the metal tubular 14 and during pushing on the mandrel 62 relative to the metal tubular 14 during treating operations such as fracing of the earth formation 34, for example.
[0011] A setting tool 74 is operationally attachable to the composite plug 26, for example, through releasable engagement of a collet (not shown) on a sleeve 78 of the setting tool 74 to the composite mandrel 62. This attachment allows a swage 82 of the setting tool 74 to move relative to the sleeve 78 and the metal tubular 14 connected thereto. Movement of the swage 82 causes radial expansion of the metal tubular 14 thereby radially expanding the seal 38 into sealing engagement with the structure 30 and radially expanding the slips 42 into anchoring engagement with the structure 30. Subsequent the radial expansion of the metal tubular 14 the setting tool 74 is retrievable, perhaps to surface, after detaching from the composite plug 26. [0012] Referring additionally to Figure 2, once the setting tool 74 has been removed, the treatment plug 10 is set to receive a plug 86, illustrated herein as a ball, seatable against a seat 90 on the composite mandrel 62. The plug 86 can also be made of composite material to facilitate later removal by drilling or milling with the rest of the components that make up the composite plug 26. The composite plug 26 is attached to the metal tubular 14 with sufficient strength, and the metal tubular 14 is anchored to the structure 30 with sufficient strength to prevent relative movement between these parts during pressuring up against the composite plug 26 while plugged with the plug 86 during a treating operation such as a fracing operation or a pressure actuating event, for example.
[0013] After any desired treatments are completed the composite plug 26 and the plug 86 are removable by machining them via a drilling or milling operation. The treatment plug 10 is configured such that once the composite plug 26 portion has been removed a relatively large through bore 94 of the metal tubular 14, is the only restriction that remains within the structure 30. The through bore 94 can be configured so that a radial dimension 98 thereof is greater than 80 percent of a greatest radial dimension 102 of the treatment plug 10 after it has been set. This large radial dimension 98 allows flow through the through bore 94 for production of hydrocarbons, for example, with little restriction. A plurality of the treatment plugs 10 can be employed within a single one of the structures 30 and all of the treatment plugs 10 can subsequently be drilled out thereby leaving little restriction to flow
therethrough.
[0014] While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited. Moreover, the use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. Furthermore, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

Claims

CLAIMS What is claimed is:
1. A treatment plug comprising:
a metal tubular expandable into sealing and anchoring engagement with a surrounding structure, the metal tubular having a shoulder at an inner radial surface thereof; and
a composite plug sealable with the metal tubular and anchorable to the shoulder.
2. The treatment plug of claim 1, further comprising metal slips positioned radially outwardly of the metal tubular.
3. The treatment plug of claim 1, further comprising polymeric seals positioned radially outwardly of the metal tubular.
4. The treatment plug of claim 1, wherein the metal tubular is radially expandable in response to a swage run therethrough.
5. The treatment plug of claim 1, wherein after the treatment plug has been expanded and the composite plug removed a smallest radial dimension of the treatment plug remaining and defining a through bore is more than 80 percent of a greatest radial dimension of the treatment plug.
6. The treatment plug of claim 5, wherein the smallest radial dimension of the treatment plug is defined by the metal tubular.
7. The treatment plug of claim 1, wherein the composite plug includes no metal.
8. The treatment plug of claim 1, wherein the composite plug is drillably removable from the metal tubular.
9. The treatment plug of claim 1, wherein the composite plug includes a seat that is sealingly receptive to a plug run thereagainst.
10. The treatment plug of claim 9, wherein the treatment plug supports fracing pressures built against a plug sealingly engaged against the seat.
11. The treatment plug of claim 9, wherein the metal tubular and the shoulder are configured to support longitudinal loads generated during swaging of the metal tubular into expanded sealing and anchoring engagement with the surrounding structure.
12. The treatment plug of claim 9, wherein the composite plug is configured to support longitudinal loads generated during swaging of the metal tubular into expanded sealing and anchoring engagement with the surrounding structure.
13. A method of anchoring a treatment plug and then removing a portion thereof, comprising: positioning the treatment plug having a metal tubular with a shoulder engaged with a composite plug within a structure;
swaging the metal tubular into sealing and anchoring engagement with the structure; plugging the composite plug;
performing a treating operation; and
drilling out the composite plug.
14. The method of anchoring the treatment plug and then removing a portion thereof of claim 13, wherein the treating operation includes fracing a formation.
15. The method of anchoring the treatment plug and then removing a portion thereof of claim 13, further comprising producing through the metal tubular after drilling out the composite plug.
16. The method of anchoring the treatment plug and then removing a portion thereof of claim 13, further comprising longitudinally compressing the metal tubular between the shoulder and a swaging head during the swaging.
17. The method of anchoring the treatment plug and then removing a portion thereof of claim 13, further comprising attaching a swaging tool to the composite plug.
18. The method of anchoring the treatment plug and then removing a portion thereof of claim 13, further comprising leaving a through bore having a minimum dimension that is more than 80 percent of a greatest dimension of the treatment plug after drilling out the composite plug.
PCT/US2012/064032 2011-12-08 2012-11-08 Treatment plug and method of anchoring a treatment plug and then removing a portion thereof Ceased WO2013085662A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/314,646 US20130146307A1 (en) 2011-12-08 2011-12-08 Treatment plug and method of anchoring a treatment plug and then removing a portion thereof
US13/314,646 2011-12-08

Publications (1)

Publication Number Publication Date
WO2013085662A1 true WO2013085662A1 (en) 2013-06-13

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Application Number Title Priority Date Filing Date
PCT/US2012/064032 Ceased WO2013085662A1 (en) 2011-12-08 2012-11-08 Treatment plug and method of anchoring a treatment plug and then removing a portion thereof

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WO (1) WO2013085662A1 (en)

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US6354372B1 (en) * 2000-01-13 2002-03-12 Carisella & Cook Ventures Subterranean well tool and slip assembly
US20020096365A1 (en) * 2000-07-12 2002-07-25 Berscheidt Kevin T. Frac plug with caged ball
US6848505B2 (en) * 2003-01-29 2005-02-01 Baker Hughes Incorporated Alternative method to cementing casing and liners
US7104322B2 (en) * 2003-05-20 2006-09-12 Weatherford/Lamb, Inc. Open hole anchor and associated method

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US6354372B1 (en) * 2000-01-13 2002-03-12 Carisella & Cook Ventures Subterranean well tool and slip assembly
US20020096365A1 (en) * 2000-07-12 2002-07-25 Berscheidt Kevin T. Frac plug with caged ball
US6848505B2 (en) * 2003-01-29 2005-02-01 Baker Hughes Incorporated Alternative method to cementing casing and liners
US7104322B2 (en) * 2003-05-20 2006-09-12 Weatherford/Lamb, Inc. Open hole anchor and associated method

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