The present disclosure relates generally to downhole tubulars, and more particularly, to tubular expanders having a detachable expansion ring that can be easily drilled out of the inside of a tubular member.
The drilling, completion and servicing of oil and gas wells typically requires the use of strings of tubulars of various sizes in a wellbore in order to transport tools, provide a path for drilling and production fluids, and in some cases, to line the wellbore in order to isolate hydrocarbon bearing formations and provide support to the wellbore. The first step of forming such wells typically involves drilling a borehole into a subterranean formation. If the subterranean formation lacks structural integrity, it is typically lined with casing, which is inserted into the well and then cemented in place. As the well is drilled to a greater depth, smaller diameter strings of casing are lowered into the wellbore and attached to the bottom of the previous string of casing. The deeper the formation, the narrower the tubular members that are employed given the telescoping nature of how the strings are connected to one another.
It is necessary that a sufficient amount of space must exist in the space formed between the nested tubulars in order to facilitate the fixing, hanging and/or sealing of one tubular from another or the passage of cement or other fluid through the annulus. The hanging of downhole tubulars in this fashion starts at the wellhead and continues down the entire length of the wellbore. As wellbores get deeper and deeper, especially in offshore environments, the nesting of tubulars in this manner results in a narrowed production pipe. The narrower the production pipe, the smaller the amount of production that is capable of being drawn out of the well over a given period of time. It has therefore been desirable to expand downhole tubulars, including casing and production pipe in order to increase the flow area of the hydrocarbons being produced.
The desire to expand downhole tubulars extends not only to the nested tubing itself, but also to the various liner hangers upon which the nesting tubing hangs from the wellhead as well as the intermediate junctions along the wellbore.
For a more complete understanding of the present disclosure and its features and advantages, reference is now made to the following description, taken in conjunction with the accompanying drawings, in which:
Illustrative embodiments of the present disclosure are described in detail herein. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation specific decisions must be made to achieve developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of the present disclosure. Furthermore, in no way should the following examples be read to limit, or define, the scope of the disclosure.
Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the disclosure as defined by the following claims.
Turning now to
The tubular expander 10 may include a main tubular body 14 and an inner tubular expansion cone 16 disposed within the main tubular body 14. The main tubular body 14 may be formed of a generally cylindrical metal pipe. The inner tubular expansion cone 16 may be disposed within a distal end 18 of the main tubular body 14. The main tubular body 14 may have a tapered inner surface 20 adjacent to and engageable with a complementary outer tapered surface 22 of the inner tubular expansion cone 16. The tapered surfaces 20 and 22 may be generally frustoconical. The inner tubular expansion cone 16 may be formed of a generally cylindrical metal pipe. The inner tubular expansion cone 16 may be secured within the main tubular body 14 through various means. Without limitation, such means may include through any suitable fasteners, threading, adhesives, welding, or combinations thereof. In one exemplary embodiment, the inner tubular expansion cone 16 may be held in place along with the main tubular body 14 by a running tool. As those of ordinary skill in the art will appreciate, there may be a number of different suitable ways to secure the inner tubular expansion cone 16 to the main tubular body 14.
The tubular expander 10 may further include an expansion ring 24 longitudinally detachable from a distal end 26 of the inner tubular expansion cone 16. The expansion ring 24 may be generally cylindrical in shape. The expansion ring 24 may include an outer curvilinear surface, which has a diameter greater than the outer diameter of the main tubular body 14. In one exemplary embodiment, the diameter of the outer curvilinear surface of the expansion ring 24 may also be greater than the diameter of the inner cylindrical surface of the liner hanger body 12. In one exemplary embodiment, the expansion ring 24 is formed of an easily drillable material. Exemplary materials include, for example, aluminum, copper alloys, mild steel, or combinations thereof.
In one exemplary embodiment, the expansion ring 24 may be detachably connected to the inner tubular expansion cone 16 by an interference fit. In this embodiment, which is illustrated in
In another embodiment, the expansion ring 24 may be detachably threaded over the distal end 26 of the inner tubular expansion cone 16, as shown in
The expansion ring 24 is more fully seen in
The primary function of the expansion ring 24 may be to expand the inner diameter of the liner hanger body 12 (referring to
In another aspect of the present disclosure, a method of expanding a tubular member is provided. The method includes the step of deploying the tubular expander 10 into the inner surface of the tubular member, which may optionally be a liner hanger body, such as liner hanger body 12. The method further includes the step of running the tubular expander 10 along the inner surface of the tubular member such that the expansion ring 24 causes the diameter of the tubular member to expand as it runs along the inner surface of the tubular member, such as is shown in the expansion shown in
The present application is a U.S. National Stage Application of International Application No. PCT/US2019/029052 filed Apr. 25, 2019, which claims priority to U.S. Provisional Application Ser. No. 62/663,564 filed on Apr. 27, 2018, both of which are incorporated herein by reference in their entirety for all purposes.
Filing Document | Filing Date | Country | Kind |
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PCT/US2019/029052 | 4/25/2019 | WO |
Publishing Document | Publishing Date | Country | Kind |
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WO2019/210023 | 10/31/2019 | WO | A |
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International Search Report and Written Opinion issued in related PCT Application No. PCT/US2019/029052 dated Sep. 25, 2019, 11 pages. |
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Number | Date | Country | |
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20210230982 A1 | Jul 2021 | US |
Number | Date | Country | |
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62663564 | Apr 2018 | US |