Sand Control Screen Assembly Having a Mechanically Attached Screen Jacket
A sand control screen assembly (100) for use in a subterranean well. The sand control screen assembly (100) includes a base pipe (102) having an outer surface and at least one opening (104). A screen jacket (106) is disposed around the base pipe (102). The screen jacket (106) has a filter medium (112) and an outer shroud (114). The outer shroud (114) has first and second ends (124, 126) with inner and outer surfaces. Connector rings (120, 122) form mechanical interfaces between the base pipe (102) and the first and second ends (124, 126), respectively, of the outer shroud (114). Each of the connector rings (120, 122) is operable to mechanically induce permanent deformation in the outer surface of the base pipe (102) and at least one of the inner surface and the outer surface of the outer shroud (114), thereby connecting the screen jacket (106) to the base pipe (102).
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This invention relates, in general, to equipment utilized in conjunction with operations performed in subterranean wells and, in particular, to a sand control screen assembly having a mechanically attached screen jacket.
BACKGROUND OF THE INVENTIONWithout limiting the scope of the present invention, its background will be described with reference to producing fluid from a hydrocarbon bearing subterranean formation, as an example.
Since the beginning of oil production from subsurface formations, the industry has been concerned with efficient control of the movement of unconsolidated formation particles, such as sand, into the wellbore. For example, such formation movement commonly occurs during production from completions in loose sandstone or following hydraulic fracture of a formation. Production of these materials causes numerous problems in the operation of oil, gas or water wells. These problems include plugged formations, tubing and subsurface flow lines, as well as erosion of casing, downhole equipment and surface equipment. These problems lead to high maintenance costs and unacceptable well downtime. Accordingly, numerous methods have been utilized to control the movement of these unconsolidated formation particles during the production of fluids.
For example, one or more sand control screen assemblies are commonly included in the completion string to control the movement of formation particles. Such sand control screen assemblies are commonly constructed by installing one or more screen jackets on a perforated base pipe. The screen jackets may include one or more drainage layers, one or more screen elements such as a wire wrapped screen or single or multi layer wire mesh screen and a perforated outer shroud. Conventionally, screen jackets have been secured to the base pipe by welding.
It has been found, however, that the process of welding a screen jacket to a base pipe is sometimes very difficult due to the difference in metallurgy of the components. For example, the material used for the base pipe may be 13 chrome while the material used for the screen jacket may be a special alloy such as 304L stainless steel, 316L stainless steel, Inconel, Hastelloy or Monel. In addition, it has been found that welding a screen jacket to a base pipe typically requires a post weld stress relief process which can be time consuming. Further, it has been found that welding a screen jacket to a base pipe can cause damage to the screen jacket resulting in numerous types of failures in the sand control screen assemblies.
Accordingly, a need has arisen for an apparatus for attaching a screen jacket to a base pipe that does not require welding incompatibly different materials. A need has also arisen for such an apparatus for attaching a screen jacket to a base pipe that does not require a post weld stress relief process. Further, a need has arisen for such an apparatus for attaching a screen jacket to a base pipe that does not result in damage to the screen jacket.
SUMMARY OF THE INVENTIONThe present invention disclosed herein comprises a sand control screen assembly for preventing the inflow of formation particles during production. The sand control screen assembly of the present invention does not require welding incompatibly different materials to connect a screen jacket to the base pipe. In addition, the sand control screen assembly of the present invention does not require a post weld stress relief process or result in damage to the screen jacket.
In one aspect, the present invention is directed to a sand control screen assembly for use in a subterranean well. The sand control screen assembly includes a base pipe having an outer surface and at least one opening in a side wall portion thereof. A screen jacket is disposed around the base pipe. The screen jacket has a filter medium and an outer shroud. The outer shroud has first and second ends with inner and outer surfaces. Connector rings form a mechanical interface between the base pipe and the first and second ends, respectively, of the outer shroud. Each of the connector rings is operable to mechanically induce permanent deformation in the outer surface of the base pipe and at least one of the inner surface and the outer surface of the outer shroud, thereby connecting the screen jacket to the base pipe.
In one embodiment, the connector rings prevent longitudinal movement of the screen jacket relative to the base pipe. In another embodiment, the connector rings prevent rotational movement of the screen jacket relative to the base pipe. In certain embodiments, each connector ring is disposed between the outer surface of the base pipe and an inner surface of the outer shroud. In other embodiments, each connector ring is disposed around the outer surface of the base pipe and an outer surface of the outer shroud. In one embodiment, the mechanically induced permanent deformation is achieved by crimping the connector rings to create penetrations into the base pipe and the outer shroud.
Preferably, the connector rings take the form of cylindrical rings having a cross sectional shape selected from the group consisting of a substantially rectangular shape, a substantially triangular shape and a substantially pyramidal shape. In some embodiments, the connector rings include spikes extending outwardly from an inner surface of the connector rings, an outer surface of the connector rings or both. In these embodiments the spikes may be removable inserts. In other embodiments, the connector rings include a plurality of friction riser extending outwardly from an inner surface of the connector rings, an outer surface of the connector rings or both.
In another aspect, the present invention is directed to a sand control screen assembly for use in a subterranean well. The sand control screen assembly includes a base pipe having an outer surface and at least one opening in a side wall portion thereof. A screen jacket is disposed around the base pipe. The screen jacket has a filter medium and an outer shroud. The outer shroud has first and second ends with inner surfaces. Connector rings are disposed between the base pipe and the first and second ends, respectively, of the outer shroud. Each of the connector rings is operably connected to the inner surface of the outer shroud and operable to mechanically induce permanent deformation in the outer surface of the base pipe, thereby connecting the screen jacket to the base pipe.
In a further aspect, the present invention is directed to a sand control screen assembly for use in a subterranean well. The sand control screen assembly includes a base pipe having an outer surface and at least one opening in a side wall portion thereof. A screen jacket is disposed around the base pipe. The screen jacket has a filter medium and an outer shroud. The outer shroud has first and second ends with outer surfaces. Connector rings are disposed around the outer surface of the base pipe and the first and second ends, respectively, of the outer shroud forming a mechanical interface therebetween. Each of the connector rings is operable to mechanically induce permanent deformation in the outer surface of the base pipe and the outer surface of the outer shroud, thereby connecting the screen jacket to the base pipe.
For a more complete understanding of the features and advantages of the present invention, reference is now made to the detailed description of the invention along with the accompanying figures in which corresponding numerals in the different figures refer to corresponding parts and in which:
While the making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts which can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention, and do not delimit the scope of the present invention.
Referring initially to
Positioned within wellbore 12 and extending from the surface is a tubing string 22. Tubing string 22 provides a conduit for formation fluids to travel from formation 20 to the surface. At its lower end, tubing string 22 is coupled to a completion string that has been installed in wellbore 12 and divides the completion interval into various production intervals adjacent to formation 20. The completion string includes a plurality of sand control screen assemblies 24, each of which is positioned between a pair of packers 26 that provides a fluid seal between the completion string and wellbore 12, thereby defining the production intervals. Sand control screen assemblies 24 serve the primary function of filtering particulate matter out of the production fluid stream.
Even though
Referring next to
Screen jacket 106 is mechanically coupled to base pipe 102 with a pair of connector rings 120, 122. In the illustrated embodiment, connector rings 120, 122 form mechanical interfaces between the outer surface of base pipe 102 and the inner surface of end portions 124, 126 of outer shroud 114. As best seen in
Referring next to
Referring next to
Referring next to
Screen jacket 206 is mechanically coupled to base pipe 202 with a pair of connector rings 220, 222. In the illustrated embodiment, connector rings 220, 222 form mechanical interfaces between the outer surface of base pipe 202 and the inner surface of end portions 224, 226 of outer shroud 214. Connector rings 220, 222 are in the form of cylindrical rings having substantially triangular cross sectional shapes and are preferably formed from a metal or metal alloy. In the illustrated embodiment, connector rings 220, 222 includes outwardly extending spikes that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 202 and outer shroud 214 such as through a crimping process to create penetrations into base pipe 202 and outer shroud 214. Once the mechanical connections are made between outer shroud 214 and base pipe 202 using connector rings 220, 222, longitudinal and rotational movement of screen jacket 206 relative to base pipe 202 is prevented. Alternatively, connector rings 220, 222 could have other types of friction riser as described above with reference to
Referring next to
Screen jacket 306 is mechanically coupled to base pipe 302 with a pair of connector rings 320, 322. In the illustrated embodiment, connector rings 320, 322 form mechanical interfaces between the outer surface of base pipe 302 and the inner surface of end portions 324, 326 of outer shroud 314. Connector rings 320, 322 are in the form of cylindrical rings having substantially pyramidal cross sectional shapes and are preferably formed from a metal or metal alloy. In the illustrated embodiment, connector rings 320, 322 includes outwardly extending spikes that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 302 and outer shroud 314 such as through a crimping process to create penetrations into base pipe 302 and outer shroud 314. Once the mechanical connections are made between outer shroud 314 and base pipe 302 using connector rings 320, 322, longitudinal and rotational movement of screen jacket 306 relative to base pipe 302 is prevented. Alternatively, connector rings 320, 322 could have other types of friction riser as described above with reference to
Referring next to
Screen jacket 406 is mechanically coupled to base pipe 402 with a pair of connector rings 420, 422. In the illustrated embodiment, connector rings 420, 422 form mechanical interfaces between the outer surface of base pipe 402 and the outer surface of end portions 424, 426 of outer shroud 414. Connector rings 420, 422 are preferably formed from a metal or metal alloy. In the illustrated embodiment, connector rings 420, 422 include outwardly extending spikes that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 402 and outer shroud 414 such as through a crimping process to create penetrations into base pipe 402 and outer shroud 414. Once the mechanical connections are made between outer shroud 414 and base pipe 402 using connector rings 420, 422, longitudinal and rotational movement of screen jacket 406 relative to base pipe 402 is prevented. Alternatively, connector rings 420, 422 could have other types of friction riser as described above with reference to
Referring next to
Screen jacket 506 is mechanically coupled to base pipe 502 with a pair of connector rings 520, 522. In the illustrated embodiment, connector rings 520, 522 form mechanical interfaces between the outer surface of base pipe 502 and the outer surface of end portions 524, 526 of outer shroud 514. Connector rings 520, 522 are preferably formed from a metal or metal alloy. In the illustrated embodiment, connector rings 520, 522 include outwardly extending spikes depicted as removable inserts 528 that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 502 and outer shroud 514 such as through a crimping process to create penetrations into base pipe 502 and outer shroud 514. Once the mechanical connections are made between outer shroud 514 and base pipe 502 using connector rings 520, 522, longitudinal and rotational movement of screen jacket 506 relative to base pipe 502 is prevented.
Referring next to
Screen jacket 606 is mechanically coupled to base pipe 602 with a pair of connector rings 620, 622. In the illustrated embodiment, connector rings 620, 622 form mechanical interfaces between the outer surface of base pipe 602 and outer shroud 614. Connector rings 620, 622 are preferably formed from a metal or metal alloy. In the illustrated embodiment, connector rings 620, 622 are welded at 624, 626 to outer shroud 614 and include outwardly extending spikes that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 602 such as through a crimping process to create penetrations into base pipe 602. Once the mechanical connections are made between outer shroud 614 and base pipe 602 using connector rings 620, 622, longitudinal and rotational movement of screen jacket 606 relative to base pipe 602 is prevented.
Referring next to
Screen jacket 706 is mechanically coupled to base pipe 702 with a pair of connector rings 720, 722 that are integrally formed on the ends of outer shroud 714 or are otherwise coupled thereto mechanically or by welds. In the illustrated embodiment, connector rings 720, 722 form mechanical interfaces between outer shroud 714 and base pipe 702. In the illustrated embodiment, connector rings 720, 722 include outwardly extending spikes that are preferably formed from a hardened material and are operable to mechanically induced permanent deformation in base pipe 702 such as through a crimping process to create penetrations into base pipe 702. Once the mechanical connections are made between outer shroud 714 and base pipe 702 using connector rings 720, 722, longitudinal and rotational movement of screen jacket 706 relative to base pipe 702 is prevented.
While this invention has been described with reference to illustrative embodiments, this description is not intended to be construed in a limiting sense. Various modifications and combinations of the illustrative embodiments as well as other embodiments of the invention will be apparent to persons skilled in the art upon reference to the description. It is, therefore, intended that the appended claims encompass any such modifications or embodiments.
Claims
1. A sand control screen assembly for use in a subterranean well, the sand control screen assembly comprising:
- a base pipe having an outer surface and at least one opening in a side wall portion thereof;
- a screen jacket disposed around the base pipe, the screen jacket having a filter medium and an outer shroud, the outer shroud having first and second ends with inner and outer surfaces; and
- connector rings forming a mechanical interface between the base pipe and the first and second ends, respectively, of the outer shroud, each of the connector rings operable to mechanically induce permanent deformation in the outer surface of the base pipe and at least one of the inner surface and the outer surface of the outer shroud, thereby connecting the screen jacket to the base pipe.
2. The sand control screen assembly as recited in claim 1 wherein the connector rings prevent longitudinal movement of the screen jacket relative to the base pipe.
3. The sand control screen assembly as recited in claim 1 wherein the connector rings prevent rotational movement of the screen jacket relative to the base pipe.
4. The sand control screen assembly as recited in claim 1 wherein each connector ring is disposed between the outer surface of the base pipe and one of the inner surfaces of the outer shroud.
5. The sand control screen assembly as recited in claim 1 wherein each connector ring is disposed around the outer surface of the base pipe and one of the outer surfaces of the outer shroud.
6. The sand control screen assembly as recited in claim 1 wherein the mechanically induced permanent deformation further comprises crimping the connector rings to create penetrations into the base pipe and the outer shroud.
7. The sand control screen assembly as recited in claim 1 wherein the connector rings further comprise cylindrical rings.
8. The sand control screen assembly as recited in claim 1 wherein the connector rings further comprise a plurality of spikes extending outwardly from at least one of an inner surface and an outer surface of the connector rings.
9. The sand control screen assembly as recited in claim 8 wherein the spikes further comprise removable inserts.
10. The sand control screen assembly as recited in claim 1 wherein the connector rings further comprise a plurality of friction riser extending outwardly from at least one of an inner surface and an outer surface of the connector rings.
11. The sand control screen assembly as recited in claim 1 wherein the connector rings have a cross sectional shape selected from the group consisting of a substantially rectangular shape, a substantially triangular shape and a substantially pyramidal shape.
12. A sand control screen assembly for use in a subterranean well, the sand control screen assembly comprising:
- a base pipe having an outer surface and at least one opening in a side wall portion thereof;
- a screen jacket disposed around the base pipe, the screen jacket having a filter medium and an outer shroud, the outer shroud having first and second ends with inner surfaces; and
- connector rings disposed between the base pipe and the first and second ends, respectively, of the outer shroud, each of the connector rings operably coupled to the outer shroud and operable to mechanically induce permanent deformation in the outer surface of the base pipe, thereby connecting the screen jacket to the base pipe.
13. The sand control screen assembly as recited in claim 12 wherein the mechanically induced permanent deformation further comprises crimping the connector rings to create penetrations into the base pipe.
14. The sand control screen assembly as recited in claim 12 wherein the connector rings further comprise a plurality of spikes extending outwardly from an inner surface of the connector rings.
15. The sand control screen assembly as recited in claim 12 wherein the connector rings further comprise a plurality of friction riser extending outwardly from an inner surface of the connector rings.
16. The sand control screen assembly as recited in claim 12 wherein the connector rings have a cross sectional shape selected from the group consisting of a substantially rectangular shape, a substantially triangular shape and a substantially pyramidal shape.
17. A sand control screen assembly for use in a subterranean well, the sand control screen assembly comprising:
- a base pipe having an outer surface and at least one opening in a side wall portion thereof;
- a screen jacket disposed around the base pipe, the screen jacket having a filter medium and an outer shroud, the outer shroud having first and second ends with outer surfaces; and
- connector rings disposed around the outer surface of the base pipe and the first and second ends, respectively, of the outer shroud forming a mechanical interface therebetween, each of the connector rings operable to mechanically induce permanent deformation in the outer surface of the base pipe and the outer surface of the outer shroud, thereby connecting the screen jacket to the base pipe.
18. The sand control screen assembly as recited in claim 17 wherein the mechanically induced permanent deformation further comprises crimping the connector rings to create penetrations into the base pipe and the outer shroud.
19. The sand control screen assembly as recited in claim 17 wherein the connector rings further comprise a plurality of spikes extending outwardly from an inner surface of the connector rings.
20. The sand control screen assembly as recited in claim 17 wherein the connector rings further comprise a plurality of friction riser extending outwardly from an outer surface of the connector rings.
Type: Application
Filed: Sep 23, 2010
Publication Date: Mar 29, 2012
Applicant: HALLIBURTON ENERGY SERVICES, INC. (Carrollton, TX)
Inventors: Stephen Michael Greci (McKinney, TX), Luke William Holderman (Plano, TX), Jean-Marc Lopez (Plano, TX)
Application Number: 12/888,607