WO2010120523A2 - Expansion against cement for zonal isolation - Google Patents
Expansion against cement for zonal isolation Download PDFInfo
- Publication number
- WO2010120523A2 WO2010120523A2 PCT/US2010/029407 US2010029407W WO2010120523A2 WO 2010120523 A2 WO2010120523 A2 WO 2010120523A2 US 2010029407 W US2010029407 W US 2010029407W WO 2010120523 A2 WO2010120523 A2 WO 2010120523A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cement
- expansion
- tubular
- annulus
- pipe
- Prior art date
Links
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
-
- 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
- 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
- the invention relates to the use of cementitious materials outside of a downhole tubular as a means for providing zonal isolation after expansion of a tubular.
- cementitious materials including but not limited to Portland cements, resins, blast-furnace slag, and blends of those materials, are typically placed in the annulus between the casing and the wellbore so as to isolate and protect the casing during drilling, completion, and operation of the well. Once pumped in place and allowed to harden, these materials provide isolation between the various formations and between the formations and surface such that the hydrocarbons can be safely produced, or alternatively the wellbore can be used for injection operations.
- Expansion can be carried out using a top-down technique, in which an expansion tool starts at the upper end of the expandable tubular and is pushed through the tubular until it has expanded the full length of the tubular, or using a bottom-up technique, in which an expansion tool starts at the bottom of the tubular and is pulled upward through the tubular. Regardless of which technique is used, if the tubular is not anchored, it will move with the expansion tool. Without movement of the expansion tool relative to the tubular, expansion will not occur. [0005] In top-down expansion techniques, the downward force of the expansion tool on the tubular can be resisted by anchoring the tubular to an adjacent tubing string or applying an upwards force by some other means.
- top-anchoring techniques In bottom-up expansion, however, it is typically desirable to leave the top end of the tubular free to move within the borehole, so as to allow for the axial shrinkage of the tubular will occur during expansion. Therefore, it may not be practical to use top-anchoring techniques and it may be desirable to anchor the lower end of the tubing instead.
- One way to perform a bottom-up expansion is to use a mechanical jack.
- the mechanical jack works within the tubular and expands a section of the tubular without requiring additional outside forces to be applied to the tubular.
- the localized expansion serves to anchor the tubular string in the wellbore sufficiently that the expansion tool can then be pulled through the tubular.
- a jack can be used to expand and anchor the lower end of a tubular for a bottom-up expansion.
- Another well-established method for expanding tubulars in a wellbore uses only hydraulic pressure.
- means are provided for means for achieving or improving zonal isolation in situations where it is not practical to access the annulus, such as when cement has already hardened in the annulus.
- zonal isolation between formations along a borehole is improved by a) providing a pipe in the borehole, wherein at least a portion of the pipe lies between the formations, b) providing a body of cement in the annulus between the borehole wall and said pipe portion, c) allowing the body of cement to cure until it has reached at least 70 Bearden units consistency, and d) expanding said pipe portion so as to decrease the cross- sectional area of the annulus between the borehole wall and said pipe portion.
- Step d) may eliminate fluid channels in the cement body and/or increase the density of the cement body.
- Step c) may or may not cause the second cement body to fracture.
- the method may further include providing a second cement body in the annulus, wherein the second cement body has a longer cure time than the first cement portion. The second cement body is not necessarily cured when step d) is carried out.
- At least one of the cement bodies may contain ringing gels and/or other polymers.
- the method may further include the step of providing an exit path for water expelled from the cement during expansion.
- the hardened cement material is designed to have specific mechanical properties such that it can withstand sufficient forces to allow the tubular to be radially expanded to a larger diameter.
- Some embodiments of the invention include a two- slurry approach in which a relatively rapid-hardening cement slurry is placed in the annulus around the lower portion of the tubular to be expanded, and a second, slower- setting slurry is placed around a second portion of the tubular and does not harden until after the expansion process is complete.
- one or both cement slurries are designed to have mechanical properties such that the slurry placed around the bottom of the tubular provides the means to anchor the tubular during initiation of expansion, but without resulting in mechanical failure of one or both cement sheaths.
- either cement slurry may contain elastomeric materials that swell if contacted by wellbore or subterranean fluids such as water, hydrocarbon, gas, and/or drilling fluids, etc., and re-establish annular hydraulic isolation, even if the presence of mechanical damage to the hardened cement.
- anchor refers to a system or device that provides sufficient engagement between the tubular and the borehole wall to allow an expansion tool to move relative to the tubular and thus to expand the tubular.
- cement formulations may contain any additives that are known in the art to achieve specific slurry properties necessary for pumping and placement, including additives and gases for foamed cements.
- Figure 1 is a schematic illustration of the bottom of a borehole in which an expandable liner and a tubing string are present.
- Figure 2 is a schematic cross-section along lines 2-2 of Figure 1.
- Figure 3 is a schematic cross-section showing the system of Figure 2 post-expansion.
- a borehole 10 may contain an expandable liner 12 and a tubing string 14.
- An expansion device 16 is affixed to the lower end of the tubing 14.
- Expansion device 16 is illustrated as an expansion cone, but may be any suitable device that is capable of incrementally radially expanding the expandable liner as the device moves through the casing.
- This assembly may further include an eccentric guide nose, stabilizer above the cone, autofill float collar, a dart catcher, two darts, safety joint, debris catcher and drill pipe to surface (all not shown), such as are known in the art. The equipment is made up and lowered into the hole with the drill pipe.
- the anchoring may be provided by the cement.
- cement refers to cement in the annulus between liner 12 and borehole 10 as shown at reference numeral 18.
- the cement may provide a mechanical engagement between the outside of the tubular and the inside of the borehole wall. If the cement is the sole anchoring means, the mechanical engagement must be sufficient to restrain the tubular against the strong upward force that is applied at the initiation of expansion.
- cement is also typically used to seal the annulus.
- the cement is mixed and pumped downhole. It is preferably separated from the other fluids by the two darts as it is pumped. The first dart lands in the dart catcher, indicating that the cement is about to enter the annulus. Extra fluid is pumped until the second dart lands, indicating that all the cement is in the annulus. Pumping is preferably stopped after a few barrels are pumped to clear the drill string of any cement. Once the pumping stops, the float collar acts as a back pressure valve to prevent the cement from flowing back up the drill string.
- casing expansion is initiated by pulling on the drill string to start movement at the cone.
- the safety joint is preferably included in the assembly to enable easy release from the drill string if there are any problems with the tools or operations.
- cement that has been allowed to at least partially cure before expansion may provide a superior annular seal after expansion.
- the cement is allowed to hydrate to a point at which its pumpability is at least 70 Bearden units of consistency (Bc).
- Bc Bearden units of consistency
- the expansion pulverizes the cement, any channels or pockets that may have initially been present in the annulus cement are eliminated and zonal isolation in the expanded region is improved.
- the present invention can be used to cure defective cement seals, which may be located by logging or indicated by the presence of fluid flow in the annulus.
- Some embodiments of the invention include a two-slurry approach in which a more- rapidly- setting cement slurry is placed in the annulus around a first portion of the tubular to be expanded, thereby providing an optional anchor, and a second, slower- setting slurry is placed around a second portion of the tubular and does not harden until after the expansion process is complete, so that formation isolation is enhanced.
- the second slurry may be provided above the first in the annulus, as shown at 22 in the Figure, or below it.
- the faster- setting cement portion may be fractured during the expansion process but may nonetheless retain its ability to anchor the tubular.
- the cure time for each cement portion will depend on various factors, including downhole temperature, cement water content, and the presence of additives. It is preferred that these factors be controlled, to the extent possible, such that the fast-setting cement portion sets within a first pre-determined time window and the slow- setting cement portion sets within a second pre-determined time window that is longer than the first pre-determined time window.
- the first cement may cure in less than 12 hours, while the slow cement may cure in no less than 50 hours.
- one of the cement slurries may be designed to have mechanical properties such that the slurry placed around the bottom of the tubular provides the means to anchor the tubular during initiation of expansion, but can be radially expanded without resulting in mechanical failure of one or both cement sheaths.
- the formation of a cement layer that can be radially expanded without fracturing can be accomplished by use of various blends of latexes, rubber particles, fibers, and binders that cure in place, such as hydraulic cements, cross-linked polymers, resins, rubber, and the like.
- the parameters that preferably controlled in this embodiment include the shear bond between the pipe and the cement, and the mechanical properties of the cement itself, including its Young's Modulus, Poisson ratio, cohesion, and friction angle. Methods for determining desired ranges for these properties and for controlling them in the cement are known to those of skill in the art.
- the cement portion that is used to anchor the expandable liner can include a crosslinked polymer gel, including those known in the art as ringing gels.
- the cement portion that anchors the expandable liner comprises a cross-linked polymer and a suitable cementitious material, including but not limited to Portland cement, pozzolan, and/or slag.
- the cement does not fully cure before expansion occurs, so the cement portion that functions as an anchor is only partially cured.
- a cement that provides a high shear bond to the pipe may require only a relatively short length of cemented pipe for to provide the anchoring force, while a cement that does not achieve as much shear bond at the time of expansion will require contact with more of the surface area of the tubular and thus a greater axial portion of the annulus.
- a 9 5/8-inch, 43.5 lb/ft casing section 24-inches long was placed inside an outer jacket of 13 3/8-inch casing.
- the outside of the 9 5/8-inch pipe was blasted with medium grit aluminum oxide to increase the roughness of the pipe, thus improved shear bond between the pipe and the cement.
- the annular gap was filled with a cement slurry composed of API Class H Portland cement + 73% fresh water + 0.6% Hydroxyethyl cellulose (viscosifier) + 0.2% fluid loss agent, mixed at 13.8 lb/gal.
- the cement was cured at 170°F and atmospheric pressure for approximately 8 hrs, at which time samples indicated a compressive strength of 579 psi.
- anchor slurries in accordance with the present invention can be composed of any Portland or non-Portland cementitious material, and likewise make use of any mixing fluids and additives that are known in the art to provide a pumpable slurry that can be placed in the wellbore as desired.
- the composition may contain any additive or combination thereof as is known in the art to achieve specific mechanical properties such as but not limited to elastomers, polymers, copolymers, latexes, binding agents, fibers, salts, and aggregates. Examples of suitable polymers include the PermSeal ® and H 2 Zero ® products available from Halliburton, Houston, Texas.
- either cement slurry may contain elastomeric materials that swell if contacted by wellbore or subterranean fluids (water, hydrocarbon, gas, and/or drilling fluids, etc.) and re-establish annular hydraulic isolation, even in the presence of mechanical damage to the hardened cement.
- elastomeric materials that swell if contacted by wellbore or subterranean fluids (water, hydrocarbon, gas, and/or drilling fluids, etc.) and re-establish annular hydraulic isolation, even in the presence of mechanical damage to the hardened cement.
- cement properties are selected for implementation of the present invention
- Techniques for achieving this are well known in the art and include but are not limited to the addition of post-set expanding agents (manganese oxide, tricalcium aluminate, salts) to the cement slurry, plastic set expanders (foam, reactive gas generators), and surfactants.
- One method to provide this collapsible volume to the cement sheath are foamed cement, in which the cement is foamed with a gas such as air or nitrogen during pumping so that after it hardens the cement sheath includes a volume fraction of compressible gas.
- Another means of providing for in situ collapse can be achieved by including hollow microspheres in the cement blend such, as the borosilicate hollow microspheres available from companies such as 3M Corporation. It will be obvious to one skilled in the art that either of these methods also reduces the volume of unreacted water per volume of set cement, and that the sacrificial collapse volumes can be customized on a well-by- well basis.
- the collapsible cement sheath may also include other mechanical modifiers such as but not limited to the previously- mentioned rubber particles, copolymers, latex, insitu gas generating compounds, and other means.
- Other means to provide a pathway for hydraulic relief to the annular gap behind the expandable tubular include but are not limited to shunt tubes, rupture disks, volume chambers, and the like that will be apparent to one skilled in the art.
- the formation may be affected by creating stress risers via hydrojetting the formation prior to running the expandable tubular in the wellbore.
- the cement in the annulus is overdisplaced, so that the lower end of the expandable tubular is surrounded by drilling fluid, cement spacer, or other noncementitious fluid at the bottom of the hole. Further, this fluid may also consist of a hydraulic cement that has a longer set time that the anchoring cement above it. This process is preferred so as to allow the initiation of the expansion process to occur with less force. [0044] In some preferred embodiments, it may be desired to pump an additional hydraulic cement or other fluid after the expansion process has been completed.
- this fluid would be to ensure that the rubblized cement in the annulus of the expanded tubular does not leak or otherwise allow communication of fluids behind the expanded tubular from deeper formations. This practice is commonly referred to by those skilled in the art as a shoe squeeze.
- cement anchoring techniques disclosed herein can be used alone, or in combination with other anchoring techniques, such as jacks or hangers. Likewise, the techniques disclosed herein can be repeated for successive lengths of expandable liner, and each length may be expanded to the same inside diameter, so that a monodiameter borehole is formed.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/260,958 US20120073814A1 (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
BRPI1013587A BRPI1013587A2 (en) | 2009-03-31 | 2010-03-31 | method for improving zonal isolation between formations along a drillhole |
AU2010236839A AU2010236839A1 (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
GB1116395.3A GB2480963B (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
CN201080014728XA CN102365419A (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
CA2757242A CA2757242C (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16512809P | 2009-03-31 | 2009-03-31 | |
US61/165,128 | 2009-03-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010120523A2 true WO2010120523A2 (en) | 2010-10-21 |
WO2010120523A3 WO2010120523A3 (en) | 2011-01-20 |
Family
ID=42936829
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2010/029407 WO2010120523A2 (en) | 2009-03-31 | 2010-03-31 | Expansion against cement for zonal isolation |
PCT/US2010/029357 WO2010117851A2 (en) | 2009-03-31 | 2010-03-31 | Cement as anchor for expandable tubing |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2010/029357 WO2010117851A2 (en) | 2009-03-31 | 2010-03-31 | Cement as anchor for expandable tubing |
Country Status (7)
Country | Link |
---|---|
US (2) | US20120061078A1 (en) |
CN (2) | CN102365420A (en) |
AU (2) | AU2010236839A1 (en) |
BR (2) | BRPI1013587A2 (en) |
CA (2) | CA2757242C (en) |
GB (2) | GB2480963B (en) |
WO (2) | WO2010120523A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017078673A1 (en) * | 2015-11-02 | 2017-05-11 | Halliburton Energy Services, Inc. | Settable compositions with variable set times |
US10316627B2 (en) | 2014-08-13 | 2019-06-11 | Shell Oil Company | Assembly and method for creating an expanded tubular element in a borehole |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US20140144634A1 (en) * | 2012-11-28 | 2014-05-29 | Halliburton Energy Services, Inc. | Methods of Enhancing the Fracture Conductivity of Multiple Interval Fractures in Subterranean Formations Propped with Cement Packs |
EP2806007B1 (en) | 2013-05-24 | 2017-04-05 | Services Pétroliers Schlumberger | Methods for maintaining zonal isolation in a subterranean well |
WO2015153286A1 (en) * | 2014-03-31 | 2015-10-08 | Schlumberger Canada Limited | Methods for maintaining zonal isolation in a subterranean well |
US10563475B2 (en) | 2015-06-11 | 2020-02-18 | Saudi Arabian Oil Company | Sealing a portion of a wellbore |
WO2018083069A1 (en) * | 2016-11-01 | 2018-05-11 | Shell Internationale Research Maatschappij B.V. | Method for sealing cavities in or adjacent to a cured cement sheath surrounding a well casing |
AU2019303954B2 (en) | 2018-07-20 | 2022-07-07 | Shell Internationale Research Maatschappij B.V. | Method of remediating leaks in a cement sheath surrounding a wellbore tubular |
CN112610177B (en) * | 2021-01-14 | 2021-09-28 | 长江大学 | Extrusion device and extrusion operation method for abandoned well casing recovery operation |
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US5667011A (en) * | 1995-01-16 | 1997-09-16 | Shell Oil Company | Method of creating a casing in a borehole |
US6575250B1 (en) * | 1999-11-15 | 2003-06-10 | Shell Oil Company | Expanding a tubular element in a wellbore |
US20050279509A1 (en) * | 2002-11-26 | 2005-12-22 | Shell Oil Company | Method of installing a tubular assembly in a wellbore |
US7284608B2 (en) * | 2004-10-26 | 2007-10-23 | Halliburton Energy Services, Inc. | Casing strings and methods of using such strings in subterranean cementing operations |
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AU6981001A (en) * | 1998-11-16 | 2002-01-02 | Shell Oil Co | Radial expansion of tubular members |
GB0023032D0 (en) * | 2000-09-20 | 2000-11-01 | Weatherford Lamb | Downhole apparatus |
GC0000398A (en) * | 2001-07-18 | 2007-03-31 | Shell Int Research | Method of activating a downhole system |
US20050217866A1 (en) * | 2002-05-06 | 2005-10-06 | Watson Brock W | Mono diameter wellbore casing |
US7066284B2 (en) * | 2001-11-14 | 2006-06-27 | Halliburton Energy Services, Inc. | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
US7040404B2 (en) * | 2001-12-04 | 2006-05-09 | Halliburton Energy Services, Inc. | Methods and compositions for sealing an expandable tubular in a wellbore |
US6722433B2 (en) * | 2002-06-21 | 2004-04-20 | Halliburton Energy Services, Inc. | Methods of sealing expandable pipe in well bores and sealing compositions |
US7036586B2 (en) * | 2004-01-30 | 2006-05-02 | Halliburton Energy Services, Inc. | Methods of cementing in subterranean formations using crack resistant cement compositions |
GB2419902B (en) * | 2004-11-09 | 2008-02-13 | Schlumberger Holdings | Method of cementing expandable tubulars |
WO2006063986A1 (en) * | 2004-12-15 | 2006-06-22 | Shell Internationale Research Maatschappij B.V. | Method of sealing an annular space in a wellbore |
US7267174B2 (en) * | 2005-01-24 | 2007-09-11 | Halliburton Energy Services, Inc. | Methods of plugging a permeable zone downhole using a sealant composition comprising a crosslinkable material and a reduced amount of cement |
CN101161983B (en) * | 2007-11-28 | 2011-04-06 | 辽河石油勘探局 | Method for improving cementing plugging effect |
-
2010
- 2010-03-31 CA CA2757242A patent/CA2757242C/en active Active
- 2010-03-31 BR BRPI1013587A patent/BRPI1013587A2/en not_active Application Discontinuation
- 2010-03-31 GB GB1116395.3A patent/GB2480963B/en not_active Expired - Fee Related
- 2010-03-31 AU AU2010236839A patent/AU2010236839A1/en not_active Abandoned
- 2010-03-31 BR BRPI1013589A patent/BRPI1013589A2/en not_active IP Right Cessation
- 2010-03-31 US US13/260,974 patent/US20120061078A1/en not_active Abandoned
- 2010-03-31 WO PCT/US2010/029407 patent/WO2010120523A2/en active Application Filing
- 2010-03-31 CN CN2010800149088A patent/CN102365420A/en active Pending
- 2010-03-31 WO PCT/US2010/029357 patent/WO2010117851A2/en active Application Filing
- 2010-03-31 CA CA2756983A patent/CA2756983A1/en not_active Abandoned
- 2010-03-31 CN CN201080014728XA patent/CN102365419A/en active Pending
- 2010-03-31 AU AU2010234746A patent/AU2010234746A1/en not_active Abandoned
- 2010-03-31 GB GB1116246A patent/GB2480788A/en not_active Withdrawn
- 2010-03-31 US US13/260,958 patent/US20120073814A1/en not_active Abandoned
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US5667011A (en) * | 1995-01-16 | 1997-09-16 | Shell Oil Company | Method of creating a casing in a borehole |
US6575250B1 (en) * | 1999-11-15 | 2003-06-10 | Shell Oil Company | Expanding a tubular element in a wellbore |
US20050279509A1 (en) * | 2002-11-26 | 2005-12-22 | Shell Oil Company | Method of installing a tubular assembly in a wellbore |
US7284608B2 (en) * | 2004-10-26 | 2007-10-23 | Halliburton Energy Services, Inc. | Casing strings and methods of using such strings in subterranean cementing operations |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10316627B2 (en) | 2014-08-13 | 2019-06-11 | Shell Oil Company | Assembly and method for creating an expanded tubular element in a borehole |
WO2017078673A1 (en) * | 2015-11-02 | 2017-05-11 | Halliburton Energy Services, Inc. | Settable compositions with variable set times |
GB2558439A (en) * | 2015-11-02 | 2018-07-11 | Halliburton Energy Services Inc | Settable compositions with variable set times |
US10414966B2 (en) | 2015-11-02 | 2019-09-17 | Halliburton Energy Services, Inc. | Settable compositions with variable set times |
GB2558439B (en) * | 2015-11-02 | 2021-12-22 | Halliburton Energy Services Inc | Settable compositions with variable set times |
Also Published As
Publication number | Publication date |
---|---|
AU2010234746A1 (en) | 2011-09-29 |
US20120073814A1 (en) | 2012-03-29 |
WO2010117851A2 (en) | 2010-10-14 |
WO2010120523A3 (en) | 2011-01-20 |
AU2010236839A1 (en) | 2011-09-22 |
BRPI1013587A2 (en) | 2016-04-19 |
GB2480963B (en) | 2013-01-30 |
CN102365420A (en) | 2012-02-29 |
GB201116246D0 (en) | 2011-11-02 |
WO2010117851A3 (en) | 2011-02-10 |
BRPI1013589A2 (en) | 2016-04-19 |
CN102365419A (en) | 2012-02-29 |
GB2480963A (en) | 2011-12-07 |
US20120061078A1 (en) | 2012-03-15 |
CA2757242C (en) | 2016-11-01 |
CA2757242A1 (en) | 2010-10-21 |
GB201116395D0 (en) | 2011-11-02 |
GB2480788A (en) | 2011-11-30 |
CA2756983A1 (en) | 2010-10-14 |
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