阅读说明：本技术 改进的隔离屏障 (Improved isolation barrier ) 是由 C·H·瑞克 W·L·麦克利戈特 P·H·图雷尔 C·B·K·考克里尔 于 2019-03-29 设计创作，主要内容包括：一种组合件和一种制造用作隔离屏障的组合件的方法,所述组合件在井中行进并固定在所述井内。所述组合件具有定位在管状主体的外部的套筒构件、固定在每个末端处,从而在其间形成腔室。流体能通过所述管状主体中的端口进入所述腔室,以使所述套筒构件抵靠所述井中较大直径的表面变形。所述套筒构件由至少两种材料形成,其在被布置在所述管状主体上之前被焊接在一起并被机械加工。一种材料比另一种材料可更易于膨胀,因此更容易变形。套筒通过螺纹和密封件连接到所述管状主体。所述套筒构件的初始构造在不影响所述管状主体或全部组合件的抗张强度的情况下允许焊接、检查和机械加工。(An assembly and a method of manufacturing an assembly for use as an isolation barrier, the assembly being run in a well and secured within the well. The assembly has a sleeve member positioned outside of the tubular body, secured at each end, forming a chamber therebetween. Fluid can enter the chamber through a port in the tubular body to deform the sleeve member against a larger diameter surface in the well. The sleeve member is formed of at least two materials that are welded together and machined prior to being disposed on the tubular body. One material may expand more easily and thus deform more easily than the other. The sleeve is connected to the tubular body by threads and a seal. The initial configuration of the sleeve member allows for welding, inspection and machining without affecting the tensile strength of the tubular body or the entire assembly.)

1. An assembly, comprising:

a tubular body arranged to travel in and be fixed within a larger diameter generally cylindrical structure;

a sleeve member comprising a sleeve body, positioned outside of the tubular body, forming a chamber therebetween;

the sleeve body is formed from at least a first sleeve material and a second sleeve material;

the first and second ends of the sleeve member are secured and sealed to the tubular body;

the tubular body including a port permitting fluid flow into the chamber to cause the sleeve member to move outwardly and deform against an inner surface of the larger diameter structure; and is

The assembly is characterized in that: the material properties of the first sleeve material are different from the material properties of the second sleeve material, and the first and second sleeve materials are joined together to form a continuous cylindrical sleeve body prior to positioning on the tubular body.

2. The assembly of claim 1, wherein the sleeve material is joined by welding.

3. An assembly according to any preceding claim, wherein a central annular section of the sleeve body is formed from the first sleeve material.

4. The assembly of claim 3, wherein a first annular end section of the sleeve body and a second annular end section of the sleeve body are formed from the second sleeve material, and the central annular section of the sleeve body is disposed between the first annular end section and the second annular end section.

5. An assembly according to any preceding claim, wherein the first sleeve material is more expandable than the second sleeve material.

6. An assembly according to any preceding claim, wherein each sleeve material is a different type of material, wherein the first sleeve material has at least one different material property to the second sleeve material.

7. The combination of any of claims 1 to 5, wherein each sleeve material is the same material having different material properties formed by processing a unitary sleeve body.

8. The assembly of any preceding claim, wherein the tubular body comprises one or more tubular sections arranged along a central longitudinal axis.

9. The assembly of claim 8, wherein the tubular body comprises a first tubular section, a mandrel, and a second tubular section.

10. The assembly of claim 9, wherein the first tubular section is threadably connected to the first annular end section of the sleeve body, the second tubular section is threadably connected to the second annular end section of the sleeve body, and the mandrel is retained between the first tubular section and the second tubular section to form the tubular body.

11. The assembly of claim 10, wherein there are one or more seals between the mandrel and the first and second tubular sections.

12. An assembly according to claim 10 or claim 11, wherein there are one or more seals between the mandrel and the first and second annular end sections of the sleeve body to form the chamber.

13. The combination of any of claims 9 to 12, wherein the tubular section and the mandrel are formable from a single material.

14. The combination of claim 13, wherein the single material is a third material having material properties different from material properties of at least one of the first sleeve material and the second sleeve material.

15. A combination according to any of claims 3 to 14, wherein the sleeve member has a reduced outer diameter on a central portion thereof.

16. An assembly according to any preceding claim, wherein the larger diameter substantially cylindrical structure is selected from the group comprising: an open hole borehole, a borehole lined with a casing or liner string that can be cemented in place downhole, or a pipeline in which another smaller diameter tubular section needs to be secured or centered.

17. An assembly according to any preceding claim, wherein the port includes a valve.

18. A method of manufacturing an assembly for use as an isolation barrier, comprising the steps of:

(a) assembling a sleeve member comprising a central portion formed of a first material and first and second end portions formed of a second material, wherein the material properties of the first material are different from the material properties of the second material;

(b) welding the first end portion, the central portion, and the second end portion together to form a sleeve body;

(c) machining the sleeve body to provide a uniform central bore;

(d) connecting a first tubular section to the first end portion by a threaded connection;

(e) sliding a mandrel inside the sleeve body and sealing the mandrel to the first tubular section, the first end portion, and the second end portion;

(f) connecting a second tubular section to the second end portion by a threaded connection and sealing the mandrel to the second end portion, and

the first and second tubular sections abut the mandrel to form a tubular body connectable in a work string, and the mandrel includes ports through which fluid can flow to fill a sealed chamber between the mandrel and the central portion.

19. The method of claim 18, further comprising the step of inspecting the sleeve member prior to connecting to the tubular body.

20. The method of claim 18 or claim 19, further comprising machining the sleeve body to reduce an outer diameter over a length of the central portion at step (c).