Patent Application
20080066930
This invention relates generally to oil and gas exploration, and in particular to forming and repairing wellbore casings to facilitate oil and gas exploration.
Conventionally, when a wellbore is created, a number of casings are installed in the borehole to prevent collapse of the borehole wall and to prevent undesired outflow of drilling fluid into the formation or inflow of fluid from the formation into the borehole. The borehole is drilled in intervals whereby a casing which is to be installed in a lower borehole interval is lowered through a previously installed casing of an upper borehole interval. As a consequence of this procedure the casing of the lower interval is of smaller diameter than the casing of the upper interval. Thus, the casings are in a nested arrangement with casing diameters decreasing in downward direction. Cement annuli are provided between the outer surfaces of the casings and the borehole wall to seal the casings from the borehole wall. As a consequence of this nested arrangement a relatively large borehole diameter is required at the upper part of the wellbore. Such a large borehole diameter involves increased costs due to heavy casing handling equipment, large drill bits and increased volumes of drilling fluid and drill cuttings. Moreover, increased drilling rig time is involved due to required cement pumping, cement hardening, required equipment changes due to large variations in hole diameters drilled in the course of the well, and the large volume of cuttings drilled and removed.
During oil exploration, a wellbore typically traverses a number of zones within a subterranean formation. Wellbore casings are then formed in the wellbore by radially expanding and plastically deforming tubular members that are coupled to one another by threaded connections existing methods for radially expanding and plastically deforming tubular members coupled to one another by threaded connections are not always reliable and do not always produce satisfactory results. In particular, the threaded connections can be damaged during the radial expansion process. Furthermore, the threaded connections between adjacent tubular members, whether radially expanded or not, are typically not sufficiently coupled to permit the transmission of energy through the tubular members from the surface to the downhole location. Further, the damaged threads may permit undesirable leakage between the inside of the casing and the exterior of the casing.
The present invention is directed to overcoming one or more of the limitations of the existing procedures for forming and/or repairing wellbore casings.
According to one aspect of the present invention, an assembly is provided that includes a first tubular member comprising a pin member including external threads, an external sleeve including: a first box member at one end including internal threads coupled to the external threads of the pin member of the first tubular member, and a second box member at another end including internal threads, a second tubular member comprising a pin member including external threads coupled to the internal threads of the second box member of the external sleeve, and an internal sleeve that receives the ends of the pin members of the first and second tubular members comprising an external flange that engages the ends of the pin members of the first and second tubular members and the external sleeve.
According to another aspect of the present invention, a method for forming a wellbore casing is provided that includes positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within a borehole that traverses a subterranean formation, and radially expanding and plastically deforming the assembly within the borehole.
According to another aspect of the present invention, an apparatus is provided that includes a wellbore that traverses a subterranean formation, and a wellbore casing positioned within and coupled to the wellbore. The wellbore casing is coupled to the wellbore by a process including: positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within the wellbore, and radially expanding and plastically deforming the assembly within the wellbore.
According to another aspect of the present invention, a system for forming a wellbore casing is provided that includes means for positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within a borehole that traverses a subterranean formation, and means for radially expanding and plastically deforming the assembly within the borehole.
According to another aspect of the present invention, an assembly is provided that includes a first tubular member comprising a pin member including external threads, a second tubular member comprising a box member including internal threads coupled to the external threads of the pin member of the first tubular sleeve, and an external sleeve coupled to and overlapping with the ends of the first and second tubular members.
According to another aspect of the present invention, a method for providing a fluid tight seal between a first tubular member that is threadably coupled to a second tubular member is provided that includes providing a stress concentrator one at least one of the first and second tubular members, and radially expanding and plastically deforming the first and second tubular members.
According to another aspect of the present invention, a method for providing a fluid tight seal between a first tubular member comprising external threads and a second tubular member comprising internal threads, wherein the external threads of the first tubular member engage the internal threads of the second tubular member, is provided that includes spacing apart the external and internal threads of the first and second tubular members into a plurality of groups, and radially expanding and plastically deforming the first and second tubular members.
Referring to
In an exemplary embodiment, the radial expansion and plastic deformation of the first tubular member 10, the external sleeve 20, the second tubular member 30, and the internal sleeve 32 causes the interfaces between one or more of the first tubular member, external sleeve, second tubular member, and/or the internal sleeve to be fluid tight.
Referring to
In an exemplary embodiment, the radial expansion and plastic deformation of the first tubular member 110, the external sleeve 120, the second tubular member 130, and the internal sleeve 138 causes the interfaces between one or more of the first tubular member, external sleeve, second tubular member, and/or the internal sleeve to be fluid tight.
Referring to
In an exemplary embodiment, the radial expansion and plastic deformation of the first tubular member 210, the second tubular member 220, and the external sleeve 222 causes the interfaces between one or more of the first tubular member, the second tubular member, and/or the external sleeve to be fluid tight. In an exemplary embodiment, during the radial expansion and plastic deformation of the first tubular member 210, second tubular member 220, and the external sleeve 222, the annular recess 224 of the pin member 212 of the first tubular member 210 provides a stress concentration that enhances the sealing of the interface between the end of the pin member of the first tubular member and the box member 218 of the second tubular member 220. In an exemplary embodiment, during the radial expansion and plastic deformation of the first tubular member 210, second tubular member 220, and the external sleeve 222, the spaced apart external and internal threads, 214a-214c, and 216a-216c, of the first and second tubular members, 210 and 220, facilitate the formation of a fluid tight seal of the interface between the end of the pin member of the first tubular member and the box member 218 of the second tubular member 220.
In an alternative embodiment of the illustrative embodiment of
An assembly has been described that includes a first tubular member comprising a pin member including external threads, an external sleeve including: a first box member at one end including internal threads coupled to the external threads of the pin member of the first tubular member, and a second box member at another end including internal threads, a second tubular member comprising a pin member including external threads coupled to the internal threads of the second box member of the external sleeve, and an internal sleeve that receives the ends of the pin members of the first and second tubular members comprising an external flange that engages the ends of the pin members of the first and second tubular members and the external sleeve. In an exemplary embodiment, the external flange of the internal sleeve defines an upper annular recess for receiving and mating with the first tubular member, and the external flange of the internal sleeve further defines a lower annular recess for receiving and mating with the second tubular member.
A method for forming a wellbore casing has been described that includes positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within a borehole that traverses a subterranean formation, and radially expanding and plastically deforming the assembly within the borehole.
An apparatus has been described that includes a wellbore that traverses a subterranean formation, and a wellbore casing positioned within and coupled to the wellbore. The wellbore casing is coupled to the wellbore by a process including: positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within the wellbore, and radially expanding and plastically deforming the assembly within the wellbore.
A system for forming a wellbore casing has been described that includes means for positioning any one, portion, or combination, of the exemplary embodiments described and illustrated within the present application within a borehole that traverses a subterranean formation, and means for radially expanding and plastically deforming the assembly within the borehole.
An assembly has been described that includes a first tubular member comprising a pin member including external threads, a second tubular member comprising a box member including internal threads coupled to the external threads of the pin member of the first tubular sleeve, and an external sleeve coupled to and overlapping with the ends of the first and second tubular members. In an exemplary embodiment, the external threads of the pin member of the first tubular member comprise a plurality of spaced apart groups of external threads, and the internal threads of the box member of the second tubular member comprise a plurality of spaced apart groups of internal threads. In an exemplary embodiment, the external surface end of the pin member of the first tubular member includes a stress concentrator. In an exemplary embodiment, the external threads of the pin member of the first tubular member include a plurality of spaced apart groups of external threads, the internal threads of the box member of the second tubular member include a plurality of spaced apart groups of internal threads, and the external surface end of the pin member of the first tubular member comprises a stress concentrator.
A method for providing a fluid tight seal between a first tubular member that is threadably coupled to a second tubular member has been described that includes providing a stress concentrator one at least one of the first and second tubular members, and radially expanding and plastically deforming the first and second tubular members.
A method for providing a fluid tight seal between a first tubular member comprising external threads and a second tubular member comprising internal threads, wherein the external threads of the first tubular member engage the internal threads of the second tubular member, has been described that includes spacing apart the external and internal threads of the first and second tubular members into a plurality of groups, and radially expanding and plastically deforming the first and second tubular members.
It is understood that variations may be made in the foregoing without departing from the scope of the invention. For example, the teachings of the present illustrative embodiments may be used to provide an insulated wellbore casing, a pipeline, or a structural support. Furthermore, the elements and teachings of the various illustrative embodiments may be combined in whole or in part in some or all of the illustrative embodiments.
Although illustrative embodiments of the invention have been shown and described, a wide range of modification, changes and substitution is contemplated in the foregoing disclosure. In some instances, some features of the present invention may be employed without a corresponding use of the other features. Accordingly, it is appropriate that the appended claims be construed broadly and in a manner consistent with the scope of the invention.
The present application is the National Stage patent application for PCT patent application serial number PCT/US2003/025707, attorney docket No. 25791.127.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of (1) U.S. provisional patent application Ser. No. 60/412,196, attorney docket no 25791.127, filed on Sep. 20, 2002, the disclosures of which are incorporated herein by reference. The present application is a continuation-in-part of U.S. utility patent application Ser. No. ______, attorney docket No. 25791.120.______, filed on ______, which is a National Stage patent application of PCT patent application serial number PCT/US2003/025676, attorney docket No. 25791.120.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of U.S. provisional patent application Ser. No. 60/405,394, attorney docket no 25791.120, filed on Aug. 23, 2002, which was a continuation-in-part of U.S. utility patent application Ser. No. ______, attorney docket No. 25791.119.______, filed on ______, which is a National Stage patent application of PCT patent application serial number PCT/US2003/025677, attorney docket No. 25791.119.02, filed on Aug. 18, 2003, which claimed the benefit of the filing dates of U.S. provisional patent application Ser. No. 60/405,610 attorney docket no 25791.119, filed on Aug. 23, 2002, which was a continuation-in-part of U.S. utility patent application Ser. No. 10/______, attorney docket No. 25791.106.05, filed on Jan. 19, 2005, which was a continuation-in-part of U.S. utility patent application Ser. No. 10/511,410, attorney docket No. 25791.101.05, filed on Oct. 14, 2004 which claimed the benefit of the filing date of U.S. provisional patent application Ser. No. 60/372,632, attorney docket No. 25791.101, filed on Apr. 15, 2002, which was a continuation-in-part of U.S. utility patent application Ser. No. 10/510,966, attorney docket No. 25791.93.05, filed on Oct. 12, 2004, which claimed the benefit of the filing date of U.S. provisional patent application Ser. No. 60/372,048, attorney docket No. 25791.93, filed on Apr. 12, 2002, which was a continuation-in-part of U.S. utility patent application Ser. No. 10/500,745, attorney docket No. 25791.92.05, filed on Jul. 6, 2004, which claimed the benefit of the filing date of U.S. provisional patent application Ser. No. 10/500,745, attorney docket number 25791.92, filed on Dec. 10, 2002. The present application is related to the following: (1) U.S. patent application Ser. No. 09/454,139, attorney docket No. 25791.03.02, filed on Dec. 3, 1999, (2) U.S. patent application Ser. No. 09/510,913, attorney docket No. 25791.7.02, filed on Feb. 23, 2000, (3) U.S. patent application Ser. No. 09/502,350, attorney docket No. 25791.8.02, filed on Feb. 10, 2000, (4) U.S. Pat. No. 6,328,113, (5) U.S. patent application Ser. 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| Number | Date | Country | |
|---|---|---|---|
| 60412196 | Sep 2002 | US | |
| 60405394 | Aug 2002 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10528223 | Aug 2005 | US |
| Child | 11944087 | Nov 2007 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 10525402 | Feb 2005 | US |
| Child | 10528223 | US |
