Downhole patch installation tool
阅读说明:本技术 井下补丁安装工具 (Downhole patch installation tool ) 是由 T·S·安德森 于 2018-06-12 设计创作,主要内容包括:本发明涉及一种用于在井(50)中超过10米的距离上膨胀补丁的井下补丁安装工具(1),井下补丁安装工具具有顶部(51)并且包括:工具本体(2),工具本体具有内孔(3)、外表面(4)、第一端部(5)和第二端部(6),第二端部布置成比第一端部更靠近顶部;在第一端部处布置在外表面上的第一囊状件组件(11)和在第二端部处布置在外表面上的第二囊状件组件(12),内孔至少从第一囊状件组件延伸至第二囊状件组件;环绕工具本体的可膨胀金属补丁(14),第一囊状件组件和第二囊状件组件在其间形成环形空间(15),可膨胀金属补丁具有在未膨胀状态下的内径,工具本体具有对着第一囊状件组件的第一开口(16)和对着第二囊状件组件的第二开口(17),从而提供内孔与第一囊状件组件和第二囊状件组件之间的流体连通,以允许加压流体进入囊状件组件以使囊状件组件膨胀,其中,工具本体具有布置在第一囊状件组件和第二囊状件组件之间的第三开口(18)以及布置在第三开口中的用于控制加压流体从内孔进入环形空间的阀(19)。本发明还涉及井下完井系统和补丁安装方法。(The invention relates to a downhole patch installation tool (1) for expanding a patch over a distance of more than 10 meters in a well (50), the downhole patch installation tool having a top (51) and comprising: a tool body (2) having an inner bore (3), an outer surface (4), a first end (5) and a second end (6), the second end being arranged closer to the top than the first end; a first bladder assembly (11) disposed on the outer surface at a first end and a second bladder assembly (12) disposed on the outer surface at a second end, the internal bore extending at least from the first bladder assembly to the second bladder assembly; an inflatable metal patch (14) surrounding the tool body, the first bladder assembly and the second bladder assembly forming an annular space (15) therebetween, the inflatable metal patch having an inner diameter in an uninflated state, the tool body having a first opening (16) opposite the first bladder assembly and a second opening (17) opposite the second bladder assembly providing fluid communication between the inner bore and the first bladder assembly and the second bladder assembly to allow pressurized fluid to enter the bladder assembly to inflate the bladder assembly, wherein the tool body has a third opening (18) disposed between the first bladder assembly and the second bladder assembly and a valve (19) disposed in the third opening for controlling the passage of pressurized fluid from the inner bore into the annular space. The invention also relates to a downhole completion system and a patch installation method.)
1. A downhole patch installation tool (1) for expanding a patch over a distance of more than 10 meters in a well (50), the downhole patch installation tool having a top (51) and comprising:
-a tool body (2) having an inner bore (3), an outer surface (4), a first end (5) and a second end (6), the second end being arranged closer to the top than the first end;
-a first bladder assembly (11) disposed on the outer surface at the first end and a second bladder assembly (12) disposed on the outer surface at the second end, the inner bore extending at least from the first bladder assembly to the second bladder assembly; and
-an expandable metal patch (14) surrounding the tool body, the first and second bladder assemblies forming an annular space (15) therebetween, the expandable metal patch having an Inner Diameter (ID) in an unexpanded stateE) The tool body having a first opening (16) opposite the first bladder assembly and a second opening (17) opposite the second bladder assembly providing fluid communication between the bore and the first and second bladder assemblies to allow pressurized fluid to enter the two bladder assemblies to expand the two bladder assemblies,
wherein the tool body has a third opening (18) disposed between the first bladder assembly and the second bladder assembly and a valve (19) disposed in the third opening for controlling the passage of the pressurized fluid from the bore into the annular space.
2. The downhole patch installation tool of claim 1, wherein the valve is a pressure control valve or a pressure relief valve.
3. A downhole patch installation tool according to claim 1 or 2, wherein a pump (21) is fluidly connected to the inner bore.
4. A downhole patch installation tool according to any of the preceding claims, wherein the tool body is installed from a drill pipe (7).
5. The downhole patch installation tool of claim 4, wherein the tool body has a length of drill pipe between the first bladder assembly and the second bladder assembly.
6. A downhole patch installation tool according to any preceding claim, wherein the expandable metal patch is secured to the tool body by expanding the first and second bladder assemblies against an inner diameter of the expandable metal patch in an unexpanded state.
7. A downhole patch installation tool according to any of the preceding claims, further comprising a locking element (9) for locking the expandable metal patch in an unexpanded state in a longitudinal extension direction of the tool body.
8. A downhole patch installation tool according to any of the preceding claims, further comprising a third bladder assembly (33) arranged on the outer surface between the first and second bladder assemblies and a fourth opening (34) in the tool body opposite the third bladder assembly for providing fluid communication between the inner bore and the third bladder assembly, wherein the tool comprises a further third opening (18) arranged on both sides of the third bladder assembly such that one of the third openings is arranged between the first and third bladder assemblies and the other third opening is arranged between the third and second bladder assemblies.
9. A downhole patch installation tool according to any preceding claim, wherein the first end of the tool body is closed or closable by a ball (35) being dropped into the bore or a check valve (23) allowing fluid from the well to enter the bore but preventing fluid in the bore from exiting through the check valve.
10. A downhole patch installation tool according to any of the preceding claims, wherein the capsule assembly has a capsule (24) and a capsule connector (25), wherein the capsule is made of an elastic material.
11. A downhole patch installation tool according to any of the preceding claims, wherein the capsule connector comprises a reinforcement element (26) configured to reinforce the capsule during expansion of the capsule.
12. A downhole patch installation tool according to any of the preceding claims, wherein the expandable metallic patch comprises a sealing element (27) on a patch outer surface (28).
13. A downhole completion system (100), comprising:
-a well tubular metal structure (52) arranged in a borehole (55); and
-an expandable metal patch (14) to be installed by a downhole patch installation tool (1) according to any of the preceding claims, the expandable metal patch abutting against an inner surface (56) of the well tubular metal structure and being secured to the inner surface (56) of the well tubular metal structure by friction.
14. A patch installation method for expanding a very long patch seal to seal an area (101) greater than 12 meters, comprising:
-arranging a downhole patch installation tool (1) according to any of claims 1-12 in a borehole (55) of a well (50) or in a well tubular metal structure (52) located in a borehole of a well (50);
-pressurizing the inner bore (3);
-passing a pressurised fluid into a first bladder assembly (11) and into a second bladder assembly (12) to expand the first and second bladder assemblies so as to expand an expandable metal patch (14) against the first and second bladder assemblies;
-opening a valve (19) in a third opening (18) with a fluid, thereby passing a pressurized fluid into the annular space (15) to inflate the inflatable metal patch between the first and second bladder assemblies; and
-reducing the pressure in the bore, thereby deflating the first bladder assembly and the second bladder assembly.
15. Method for patch installation according to claim 14, wherein the valve (19) in the third opening (18) is opened when the pressurized fluid reaches a predetermined pressure.
Technical Field
The present invention relates to a downhole patch installation tool for expanding a patch over a distance of more than 10 meters in a well. The invention also relates to a downhole completion system and a patch installation method.
Technical Field
When the well produces too much water, the patch is expanded downhole to seal a portion of the well tubular metal structure, thereby reducing water production. Thus, when a leak, opening, valve or perforation in the well tubular structure is identified, a patch is inserted against the water producing part and expanded. However, in case the water producing portion of the well tubular structure is a perforated zone extending a distance of 10 meters, there are no sufficiently long patches and patch installation systems and a plurality of patches have to be installed side by side. However, installing multiple patches side-by-side is time consuming because multiple passes in the well are required and it is difficult for the patches to properly seal all perforations.
Disclosure of Invention
It is an object of the present invention to wholly or partly overcome the above disadvantages and drawbacks of the prior art. More particularly, it is an object to provide an improved downhole patch installation tool that is capable of installing patches suitably for areas longer than 12 meters.
The above objects, together with numerous other objects, advantages, and features, which will become evident from the below description, are accomplished by the solution in accordance with the present invention by a downhole patch installation tool for expanding a patch over a distance in a well exceeding 10 meters, the downhole patch installation tool having a top and comprising:
-a tool body having an inner bore, an outer surface, a first end and a second end, the second end being arranged closer to the top than the first end;
-a first bladder assembly disposed on the outer surface at the first end and a second bladder assembly disposed on the outer surface at the second end, the inner bore extending at least from the first bladder assembly to the second bladder assembly; and
-an inflatable metal patch surrounding the tool body, the first bladder assembly and the second bladder assembly forming an annular space therebetween, the inflatable metal patch having an inner diameter in an uninflated state, the tool body having a first opening opposite the first bladder assembly and a second opening opposite the second bladder assembly providing fluid communication between the inner bore and the first bladder assembly and the second bladder assembly to allow pressurized fluid to enter the bladder assembly to inflate the bladder assembly,
wherein the tool body has a third opening disposed between the first bladder assembly and the second bladder assembly and a valve disposed in the third opening for controlling pressurized fluid from the bore into the annular space.
The valve may be a pressure control valve or a pressure relief valve.
Further, the valve may be a pressure activated valve.
Further, the patch may have a length greater than 10 meters.
Further, the valve may have a first position in which fluid is not allowed to enter the annular space and a second position in which fluid is allowed to enter the annular space.
Additionally, the valve may be actuated under pressure to open to allow fluid to enter the annular space.
Furthermore, the valve may be opened at a specific pressure.
The valve is movable from the first position to the second position at a particular pressure.
Further, a pump may be fluidly connected to the bore.
Furthermore, the pump may be driven by a motor in the tool.
Furthermore, the pump may be arranged in the tool or at the surface/top of the well.
Furthermore, the first bladder assembly and the second bladder assembly may be arranged to have a mutual distance of at least 15 meters, preferably at least 25 meters, more preferably at least 50 meters.
Further, the expandable metal patch may be a tubular tube.
The expandable metal patch may be a continuous tubular metal tube.
Further, the tool body may be mounted from a drill rod.
Further, the tool body may have a length of drill rod between the first bladder assembly and the second bladder assembly.
Further, the second end of the tool body may be connected with the drill rod for supplying pressurized fluid to the bore.
Further, the second end of the tool body may be connected to a cable.
Furthermore, the second end of the tool body may be connected to a pump driven by a motor connected to a cable.
The first opening may have a valve.
Further, the second opening may have a valve.
Further, the expandable metal patch may be secured to the tool body by the first and second bladder assemblies expanding against an inner diameter of the expandable metal patch in an unexpanded state.
The downhole patch installation tool according to the invention may further comprise a locking element for locking the expandable metal patch in an unexpanded state in the longitudinal extension of the tool body.
The downhole patch installation tool according to the invention may further comprise a third bladder assembly arranged on the outer surface between the first and second bladder assemblies and a fourth opening on the tool body opposite the third bladder assembly for providing fluid communication between the inner bore and the third bladder assembly, and the tool may comprise a further third opening, and the two third openings may be arranged on both sides of the third bladder assembly such that one of the third openings is arranged between the first and third bladder assemblies and the other third opening is arranged between the third and second bladder assemblies.
Further, the first end of the tool body may be closed or may be closed by pitching a ball into the bore or by a check valve, allowing fluid from the well to enter the bore but preventing fluid in the bore from exiting through the check valve.
By having a check valve in the closed end, the bore can be pressurized to inflate the bladder assembly while being easily deployed because fluid in the well can enter the bore.
Further, the bladder assembly may have a bladder and a bladder connector, wherein the bladder is made of a resilient material.
Further, the bladder connector may be made of metal.
The bladder connector may be threaded onto the outer surface.
Further, the bladder connector may include a reinforcement element configured to reinforce the bladder during inflation.
Further, the expandable metallic patch may include a sealing element on an outer surface of the patch.
The downhole patch installation tool may include a second expandable metal patch.
The invention also relates to a downhole completion system comprising:
-a well tubular metal structure arranged in a borehole; and
-an expandable metal patch installed by a downhole patch installation tool according to the invention, the expandable metal patch abutting against the inner surface of the well tubular metal structure and being secured to the inner surface of the well tubular metal structure by friction.
Furthermore, the present invention relates to a patch installation method for expanding a very long patch seal to seal an area greater than 12 meters, the method comprising:
-arranging a downhole patch setting tool according to the invention in a borehole of a well or in a well tubular metal structure located in a borehole of a well;
-pressurizing the inner bore;
-passing a pressurized fluid into a first bladder assembly and into a second bladder assembly to expand the first and second bladder assemblies to expand the expandable metal patch against the first and second bladder assemblies;
-opening a valve in the third opening with a fluid, thereby passing a pressurized fluid into the annular space to inflate the inflatable metal patch between the first bladder assembly and the second bladder assembly; and
-reducing the pressure in the bore, thereby deflating the first bladder assembly and the second bladder assembly.
The invention also relates to a patch installation method according to the invention, wherein the valve in the third opening is opened when the pressurized fluid reaches a predetermined pressure.
Finally, the method may include pressurizing the bladder assemblies simultaneously or sequentially.
Drawings
The invention and many of its advantages will be described in more detail below with reference to the accompanying schematic drawings, which show, for purposes of illustration, only some non-limiting embodiments, in which:
figure 1 shows a partial cross-sectional view of a downhole patch installation system with a patch installation tool in a well tubular metal structure;
FIG. 2 depicts a partial cross-sectional view of another downhole patch installation tool and an expandable metallic patch in its initial unexpanded state;
FIG. 3A shows a partial cross-sectional view of yet another downhole patch installation tool having an unexpanded expandable metal patch;
FIG. 3B shows a partial cross-sectional view of the downhole patch installation tool of FIG. 3A with the expandable metal patch partially expanded and partially unexpanded;
FIG. 3C shows a partial cross-sectional view of the downhole patch installation tool of FIG. 3A with both end portions and a middle portion of the expandable metal patch slightly expanded;
FIG. 3D shows a partial cross-sectional view of the downhole patch installation tool of FIG. 3C with both end portions and an intermediate portion of the expandable metal patch expanded more than in FIG. 3C and almost against a wall of the well tubular metal structure while fluid is still able to pass the end portions;
FIG. 3E shows a partial cross-sectional view of the downhole patch installation tool of FIG. 3A with the expandable metal patch fully expanded;
FIG. 4 shows a partial cross-sectional view of another downhole patch installation tool; and
fig. 5 shows a partial cross-sectional view of yet another downhole patch installation tool having a third bladder assembly.
All the figures are highly schematic and not necessarily to scale, and they show only those parts which are necessary for the elucidation of the invention, other parts being omitted or merely suggested.
Detailed Description
Figure 1 shows a downhole
By having a third opening and a valve disposed therein, the downhole patch installation tool can first pressurize two
As shown in fig. 3A, the
By having a pressure controlled valve, the valve is activated by a specific pressure and no tools or balls are required to open the valve. Thus, expansion of the expandable metal patch can be achieved in one pressing step, thereby avoiding any deformation hardening. When there are multiple pressing steps, the expandable metal patch will harden during the time between the pressing steps and therefore the patch will require a higher pressure to begin expansion again after such hardening.
To inflate the
In fig. 1, the downhole patch installation tool has a tool body installed from a
In fig. 2, a
In fig. 4, the downhole
In fig. 3A-E and 2, the
To reinforce the bladder during inflation, the
In fig. 5, the downhole
As illustrated in fig. 1, the present invention also relates to a
Accordingly, an expandable metallic patch is installed by a patch installation method comprising the steps of: arranging a downhole patch installation tool in the
The stroking tool may be used as a pump and thus as part of a patch installation tool. The stroking tool includes an electric motor for driving the pump. The pump pumps fluid into the piston housing to actuate the piston therein. The piston is disposed on the stroke rod. The pump may pump fluid into the piston housing on one side and simultaneously pump fluid out on the other side of the piston.
Fluid or wellbore fluid refers to any type of fluid present downhole in an oil or gas well, such as natural gas, oil-based mud, crude oil, water, and the like. Gas refers to any type of gas component present in a well, completion, or open hole, and oil refers to any type of oil component, such as crude oil, oleaginous fluids, and the like. The gas, oil and water fluids may thus each comprise other elements or substances than gas, oil and/or water, respectively.
As shown in fig. 1, the well tubular metal structure may comprise an
By casing is meant any type of pipe, conduit, tubular structure, liner, string, etc. used downhole in connection with oil or gas production.
In the event that the tool is not fully submerged in the casing, a downhole tractor may be used to push the tool fully into position in the well. The downhole tractor may have projectable arms with wheels, wherein the wheels contact an inner surface of the casing for advancing the tractor and the tool within the casing. Downhole tractors are any type of driving tool capable of pushing or pulling a tool downhole, e.g. Well
Although the invention has been described above in connection with preferred embodiments thereof, several variations will be apparent to those skilled in the art which may be made without departing from the invention as defined in the following claims.
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