A completion tool packer rubber element assembly

Abstract

The utility model discloses a kind of completion tool packer rubber cylinder assemblies, including upper cone, lower cone, outer shoulder, inner shoulder, compression ring and rubber cylinder, upper cone, lower cone are all sleeved and installed on mandrel, upper cone, lower cone are all fixed with mandrel by shear nail;Outer shoulder outer end face, inner shoulder inner end face are all set to concave conical surface structure, one rubber cylinder is sleeved and installed on mandrel, two groups of outer shoulder, inner shoulder, compression ring are located mandrel and are sleeved and installed on mandrel;The width size of annular groove is greater than the width size of annular protrusion, first slit is provided on outer shoulder, second slit is provided on inner shoulder.This assembly is applicable to single rubber cylinder packer, can reduce the use number of spacer ring and rubber cylinder, reduce manufacturing and material cost.Meanwhile, compared with traditional tile structure, outer shoulder, inner shoulder, compression ring are easily machined and formed, not only can reduce the production cost of outer shoulder, inner shoulder, compression ring, but also can improve its structural strength.

Description

Technical Field

[0001] This utility model belongs to the field of well completion tool technology, and in particular, it designs a packer rubber sleeve assembly for well completion tools. Background Technology

[0002] A packer sleeve assembly is a component that integrates sealing, anti-outburst, anchoring, and adaptability. Its function is to provide safe, reliable, and controllable permanent or temporary isolation in harsh downhole environments with high temperatures, high pressures, and corrosive fluids, providing fundamental support for various complex oil and gas well operations. Reducing the number of packers, as well as the number of outer and inner shoulders, pressure rings, and spacers, can lower manufacturing and material costs while improving the stability of the packer assembly. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a packer rubber sleeve assembly for well completion tools that can reduce manufacturing and material costs.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a packer rubber sleeve assembly for well completion tools, comprising an upper cone, a lower cone, an outer shoulder, an inner shoulder, a pressure ring, and a rubber sleeve, wherein the upper cone and the lower cone are both sleeved on the mandrel, and the upper cone and the lower cone are both fixed to the mandrel by shear pins; The outer end face of the outer shoulder and the inner end face of the inner shoulder are both provided with concave conical structures. The inner end face of the outer shoulder is provided with an annular protrusion, and the outer end face of the inner shoulder is provided with an annular groove that matches the annular protrusion. The outer end face of the pressure ring is provided with a sloping structure that matches the inner shoulder. The inner end faces of the upper cone and the lower cone are both provided with sloping structures that match the outer end face of the outer shoulder. A rubber sleeve is installed on the mandrel. The two sets of outer shoulders, inner shoulders, and pressure rings are located on the mandrel and are sleeved on the mandrel. The width of the annular groove is greater than the width of the annular protrusion. A first slit is provided on the outer shoulder, and a second slit is provided on the inner shoulder.

[0005] Preferably, the two ends of the rubber tube are configured as stepped structures, and the pressure ring is slidably sleeved on the stepped structures.

[0006] Preferably, the width of the annular groove is 1.1-1.4 times the width of the annular protrusion.

[0007] Preferably, an inner ring is fixedly sleeved on the mandrel, and an annular notch structure that matches the inner ring is provided at the center of the inner wall of the rubber tube. The top edge of the inner ring is set as a rounded surface structure.

[0008] Compared with the prior art, the advantages of this utility model are: this component is suitable for packers with a single rubber tube, which can reduce the number of spacers and rubber tubes used, and reduce manufacturing and material costs. At the same time, compared with the traditional tile-shaped structure, the outer shoulder, inner shoulder, and pressure ring are easier to machine and form, which can not only reduce the production cost of the outer shoulder, inner shoulder, and pressure ring, but also improve their structural strength. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Figure 1 This is a perspective view of the present invention.

[0011] Figure 2 This is the front view of this utility model.

[0012] Figure 3 This is a cross-sectional view of the present invention.

[0013] Figure 4 yes Figure 3 Enlarged structural diagram at point M.

[0014] Figure 5 yes Figure 3 Enlarged structural diagram at point N.

[0015] Figure 6 This is a 3D diagram of the outer shoulder pad.

[0016] Figure 7 This is a 3D diagram of the inner shoulder pad. Detailed Implementation

[0017] The present invention will now be described in detail with reference to specific embodiments: like Figures 1 to 7 The well completion tool packer sleeve assembly shown includes an upper cone 11, a lower cone 12, an outer shoulder 2, an inner shoulder 3, a pressure ring 4, and a sleeve 5. The upper cone 11 and the lower cone 12 are both sleeved on the mandrel 6, and the upper cone 11 and the lower cone 12 are both fixed to the mandrel 6 by shear pins 7. The inner end is defined as the position closest to the center of the rubber tube 5, and the outer end is defined as the position furthest from the center of the rubber tube 5. The outer end face of the outer shoulder 2 and the inner end face of the inner shoulder 3 are both provided with concave conical structures. The inner end face of the outer shoulder 2 is provided with an annular protrusion 21, and the outer end face of the inner shoulder 3 is provided with an annular groove 31 that mates with the annular protrusion 21. The outer end face of the pressure ring 4 is set as a slope structure that mates with the inner shoulder 3. The inner end faces of the upper cone 11 and the lower cone 12 are both set as slope structures that mate with the outer end face of the outer shoulder 2. One rubber tube 5 is sleeved and installed on the mandrel 6. Two sets of outer shoulders 2, inner shoulders 3, and pressure ring 4 are located on the mandrel 6 and sleeved and installed on the mandrel 6. The width of the annular groove 31 is greater than the width of the annular protrusion 21. The outer shoulder 2 is provided with a first slit 22, and the inner shoulder 3 is provided with a second slit 32. The first slit 22 and the second slit 32 are offset by 180°, which can avoid the problem that the first slit 22 and the second slit 32 overlap and cause the end of the first slit 22 of the outer shoulder 2 to tilt and embed into the inner shoulder 3 when it is pressed.

[0018] The rubber sleeve 5 is configured with stepped structures 51 at both ends. The pressure ring 4 is slidably fitted onto the stepped structures 51, which facilitates the pressure ring 4 to apply pressure to the rubber sleeve 5, causing its middle part to deform and fit against the well wall to complete the seal.

[0019] The width of the annular groove 31 is 1.26 times the width of the annular protrusion 21, allowing the outer shoulder 2 and the inner shoulder 3 to move outward relative to each other, thus better applying pressure to the pressure ring 4.

[0020] An inner ring 52 is fixedly sleeved on the mandrel 6. An annular notch structure that matches the inner ring 52 is provided at the center of the inner wall of the rubber tube 5. The annular notch structure is a weak point. When the rubber tube 5 is compressed, it folds and deforms here. The inner ring 52 can support the annular notch structure of the rubber tube 5 to prevent it from collapsing when not in a set-sealing condition. If it collapses here, the annular notch structure will fold inward when the rubber tube 5 is compressed and will not be able to play a sealing role. The top edge of the inner ring 52 is set as a rounded surface structure.

[0021] When the packer is set, the upper cone 11 is pressed and shears the shear pin 7, pushing the outer shoulder 2 at this end to move inward, applying pressure to the inner shoulder 3, the pressure ring 4 and the rubber sleeve 5 in sequence. Because the outer shoulder 2 and the inner shoulder 3 are provided with concave conical structures, and the upper cone 11, the pressure ring 4 have inclined structures, and the outer shoulder 2 and the inner shoulder 3 are respectively provided with a first slit 22 and a second slit 32, the outer shoulder 2 and the inner shoulder 3 can expand outward under pressure operation to prevent the rubber sleeve 5 from being pushed outward.

Claims

1. A packer sleeve assembly for well completion tools, characterized in that: It includes an upper cone (11), a lower cone (12), an outer shoulder (2), an inner shoulder (3), a pressure ring (4), and a rubber sleeve (5). The upper cone (11) and the lower cone (12) are both sleeved and installed on the mandrel (6). The upper cone (11) and the lower cone (12) are both fixed to the mandrel (6) by shear pins (7). The outer end face of the outer shoulder (2) and the inner end face of the inner shoulder (3) are both provided with concave conical structures. The inner end face of the outer shoulder (2) is provided with an annular protrusion (21), and the outer end face of the inner shoulder (3) is provided with an annular groove (31) that matches the annular protrusion (21). The outer end face of the pressure ring (4) is provided with a sloping structure that matches the inner shoulder (3). The inner end faces of the upper cone (11) and the lower cone (12) are both provided with sloping structures that match the outer end face of the outer shoulder (2). A rubber tube (5) is sleeved and installed on the spindle (6). The two sets of outer shoulders (2), inner shoulders (3) and pressure ring (4) are located on the spindle (6) and sleeved and installed on the spindle (6). The width of the annular groove (31) is greater than the width of the annular protrusion (21). The outer shoulder (2) is provided with a first slit (22), and the inner shoulder (3) is provided with a second slit (32).

2. The well completion tool packer sleeve assembly according to claim 1, characterized in that: The two ends of the rubber tube (5) are set as stage structures (51), and the pressure ring (4) is slidably sleeved on the stage structure (51).

3. The packer sleeve assembly for well completion tools according to claim 1, characterized in that: The width of the annular groove (31) is 1.1-1.4 times the width of the annular protrusion (21).

4. The packer sleeve assembly for well completion tools according to claim 1, characterized in that: An inner ring (52) is fixedly sleeved on the spindle (6). An annular notch structure that matches the inner ring (52) is provided at the center of the inner wall of the rubber tube (5). The top edge of the inner ring (52) is set as a rounded surface structure.

Images