Mechanical setting fishable and drillable bridge plug

Abstract

The utility model discloses a mechanical setting salvageable and drillable bridge plug, particularly relates to the technical field of bridge plugs, and comprises a bridge plug main body and two groups of auxiliary parts which are arranged outside the bridge plug main body and are used for enhancing the sealing performance; the two auxiliary parts comprise supporting rings arranged outside the bridge plug body in a sleeving mode, the ends, close to the bridge plug body, of the supporting rings are sleeved with adjusting rings, and the ends, away from the bridge plug body, of the adjusting rings are sleeved with fixing rings. The adjusting ring is in threaded connection with the supporting ring, the adjusting ring can be rotated to move to the position between the top sealing ring and the bottom sealing ring along the supporting ring, and due to the fact that the sections of the ends, close to the adjusting ring, of the top sealing ring and the bottom sealing ring are inclined planes, the adjusting ring can move into the top sealing ring and the bottom sealing ring through the inclined planes. And the top sealing ring and the bottom sealing ring are extruded and deformed, so that the fitting tightness between the top sealing ring and the bottom sealing ring as well as the adjusting ring and the rubber sleeve is enhanced, gaps are reduced, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge plug technology, and more specifically to a mechanically set, retrievable, and drillable bridge plug. Background Technology

[0002] Bridge plugs are crucial tools for sealing oil and gas wells, characterized by fewer construction steps, shorter construction time, and accurate sealing positioning. Retrievable bridge plugs are connected to the setting tool via a breakaway rod and breakaway ring during well running. After being transported to the predetermined position in the wellbore using a cable or tubing string, the bridge plug is set and released via surface ignition or pressure injection from inside the tubing, ensuring both safety and reliability. For retrieval, simply lower the retrieval tool, open the central tube locking mechanism on the bridge plug, and then re-insert the tubing string to release it. This method is characterized by simple setting, retrieval, and release operations, convenient construction, and a high success rate.

[0003] In oilfield fracturing operations, retrievable bridge plugs are commonly used for sealing operations, as shown in the prior art disclosed in publication number CN211950435U. While this prior art enhances the sealing effect of component connections, further improving sealing performance and preventing displacement or loosening of the third sealing ring, effectively strengthening the sealing performance at the connections of various components within the bridge plug body and improving the stability of the bridge plug during use, and allowing for quick and easy insertion of the steel ball into the slot, thus avoiding wear caused by rotation when the steel ball is inserted into the third sealing ring and extending its service life, the contact effect of the multiple sealing rings in this prior art is poor, and they cannot fit tightly together, which affects the sealing performance of this technical solution. Utility Model Content

[0004] Therefore, this utility model provides a mechanically set, retrievable, and drillable bridge plug to solve the problem in the prior art where poor contact effect of the sealing ring results in an inability to fit tightly, thus affecting sealing performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mechanically set, retrievable, and drillable bridge plug, comprising a bridge plug body and two sets of auxiliary components installed on the outside of the bridge plug body to enhance sealing performance;

[0006] Both sets of auxiliary components include a support ring sleeved on the outside of the bridge plug body. An adjustment ring is sleeved on the outside of the end of the support ring closer to the bridge plug body, and a fixing ring is sleeved on the outside of the end of the adjustment ring farther away from the bridge plug body.

[0007] The fixed ring has a top sealing ring and a bottom sealing ring inside. The top sealing ring is fixed to the inner wall of the fixed ring. The end of the adjusting ring away from the support ring is located between the top sealing ring and the bottom sealing ring.

[0008] Furthermore, the bridge plug body includes a rubber sleeve, with a top connector and a bottom connector at both ends of the rubber sleeve. Drillable slips are installed on the side of the top connector and the bottom connector near the rubber sleeve. A composite cone is installed on the side of the drillable slip near the rubber sleeve. A composite plate is installed on the side of the composite cone near the rubber sleeve. The end of the composite plate away from the composite cone is sleeved on the outside of one end of the rubber sleeve.

[0009] The support ring is sleeved on the outside of the end of the rubber tube near the composite sheet, and the fixing ring and the bottom sealing ring are both installed on the side of the composite sheet near the rubber tube.

[0010] Furthermore, the inner wall of the top sealing ring near the adjusting ring and the outer wall of the bottom sealing ring near the adjusting ring are both inclined.

[0011] Furthermore, the outer and inner walls of the adjusting ring at the end away from the support ring are both inclined, and the adjusting ring is in contact with the inclined surfaces on the top and bottom sealing rings, respectively, away from the top and bottom of the support ring.

[0012] Furthermore, the support ring has an internal thread machined on the outer side of the end near the rubber cylinder, and the adjusting ring has an external thread machined on the inner wall of the end near the rubber cylinder. The adjusting ring is threadedly connected to the support ring.

[0013] Furthermore, an annular groove is formed inside one end of the composite sheet corresponding to the glue tube, and an inner sealing ring is installed inside the annular groove. The inner sealing ring is sleeved on the outside of the end of the glue tube near the composite sheet.

[0014] Furthermore, multiple anti-slip strips are installed on the outer side of the adjusting ring near the rubber cylinder.

[0015] Furthermore, the multiple anti-slip strips are evenly spaced apart.

[0016] The present invention has the following advantages:

[0017] The adjusting ring can be rotated along the support ring to the space between the top and bottom sealing rings by the threaded connection between the adjusting ring and the support ring. Since the cross-section of the top and bottom sealing rings near the adjusting ring is set as an inclined surface, the adjusting ring can be displaced into the interior of the top and bottom sealing rings by the inclined surface, and the top and bottom sealing rings are squeezed and deformed, which enhances the tightness of the fit between the top and bottom sealing rings, the adjusting ring and the rubber sleeve, reduces the gap and improves the sealing performance. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the rubber tube of this utility model;

[0022] Figure 3 This is a cross-sectional view of the composite sheet of this utility model;

[0023] Figure 4 This is an exploded view of the regulating ring of this utility model;

[0024] Figure 5 This is a sectional view of the fixing ring of this utility model.

[0025] In the diagram: 1. Support ring; 2. Adjusting ring; 3. Fixing ring; 4. Top sealing ring; 5. Bottom sealing ring; 6. Rubber sleeve; 7. Top connector; 8. Bottom connector; 9. Drillable slip; 10. Composite cone; 11. Composite sheet; 12. Internal thread; 13. External thread; 14. Ring groove; 15. Inner sealing ring; 16. Anti-slip strip. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Refer to the instruction manual appendix Figure 1-5This utility model provides a mechanically set, retrievable, and drillable bridge plug, including a bridge plug body and two sets of auxiliary components installed on the outside of the bridge plug body to enhance sealing performance;

[0028] Both sets of auxiliary components include a support ring 1 sleeved on the outside of the bridge plug body. An adjusting ring 2 is sleeved on the outside of the end of the support ring 1 closest to the bridge plug body, and a fixing ring 3 is sleeved on the outside of the end of the adjusting ring 2 furthest from the bridge plug body. The fixing ring 3 has a top sealing ring 4 and a bottom sealing ring 5 inside. The outside of the top sealing ring 4 is fixed to the inner wall of the fixing ring 3. The end of the adjusting ring 2 furthest from the support ring 1 is located between the top sealing ring 4 and the bottom sealing ring 5. Because the inner wall of the end of the top sealing ring 4 closest to the adjusting ring 2 and the outer wall of the end of the bottom sealing ring 5 closest to the adjusting ring 2 are both inclined, and because the outer wall and inner wall of the end of the adjusting ring 2 furthest from the support ring 1 are both inclined, and the top and bottom of the adjusting ring 2 furthest from the support ring 1 are in contact with the inclined surfaces of the top sealing ring 4 and the bottom sealing ring 5 respectively, the adjusting ring 2 can be displaced between the top sealing ring 4 and the bottom sealing ring 5 by means of the inclined surfaces, and gradually squeeze the top sealing ring 4 and the bottom sealing ring 5, so that the top sealing ring 4 and the bottom sealing ring 5 can deform and make tight contact with the adjusting ring 2, thereby enhancing the sealing performance.

[0029] In use, because the adjusting ring 2 is threadedly connected to the support ring 1, the operator can rotate the adjusting ring 2 to move outward along the support ring 1. This allows the adjusting ring 2 to gradually move between the top sealing ring 4 and the bottom sealing ring 5. Since the cross-section of the top sealing ring 4 and the bottom sealing ring 5 near the adjusting ring 2 is set as an inclined surface, the adjusting ring 2 can move into the interior of the top sealing ring 4 and the bottom sealing ring 5 through the inclined surface, and compress and deform the top sealing ring 4 and the bottom sealing ring 5, thereby enhancing the tightness of the fit between the top sealing ring 4 and the bottom sealing ring 5 and the adjusting ring 2 and the rubber sleeve 6, reducing gaps and improving sealing performance.

[0030] To facilitate the maintenance of downhole equipment, such as Figure 1 and 2 As shown, the bridge plug body includes a rubber sleeve 6. A top connector 7 and a bottom connector 8 are respectively provided at both ends of the rubber sleeve 6. Drillable slips 9 are installed on the side of the top connector 7 and the bottom connector 8 closest to the rubber sleeve 6. A composite cone 10 is installed on the side of the drillable slips 9 closest to the rubber sleeve 6. A composite plate 11 is installed on the side of the composite cone 10 closest to the rubber sleeve 6. The end of the composite plate 11 furthest from the composite cone 10 is fitted onto the outside of one end of the rubber sleeve 6. A support ring 1 is fitted onto the outside of the end of the rubber sleeve 6 closest to the composite plate 11. A fixing ring 3 and a bottom sealing ring 5 are both installed on the side of the composite plate 11 closest to the rubber sleeve 6. Through the use of the rubber sleeve 6, with the top connector 7 and the bottom connector 8 at both ends, maintenance of downhole equipment can be performed.

[0031] To facilitate adjustment of the adjusting ring 2 and ensure its stability, such as Figure 4 and5 As shown, the support ring 1 has an internal thread 12 machined on the outer side of the end near the rubber cylinder 6, and the adjusting ring 2 has an external thread 13 machined on the inner wall of the end near the rubber cylinder 6. The adjusting ring 2 is threadedly connected to the support ring 1. Through the threaded connection between the adjusting ring 2 and the support ring 1, the operator can operate the adjusting ring 2 to move along the support ring 1. The threaded connection can ensure the stability of the adjusting ring 2 after displacement.

[0032] To improve the sealing effect, such as Figure 3 As shown, an annular groove 14 is provided inside one end of the composite sheet 11 corresponding to the glue tube 6. An inner sealing ring 15 is installed inside the annular groove 14. The inner sealing ring 15 is sleeved on the outside of the glue tube 6 near the composite sheet 11. By contacting the glue tube 6 with the inner sealing ring 15, the bonding effect between the composite sheet 11 and the glue tube 6 can be enhanced, thereby enhancing the sealing performance.

[0033] To improve the stability of the operating regulating ring 2, such as Figure 1 , 2 As shown in Figure 5, multiple anti-slip strips 16 are installed on the outer side of the adjusting ring 2 near the rubber cylinder 6. The multiple anti-slip strips 16 are evenly spaced apart. By connecting the anti-slip strips 16 with the adjusting ring 2, the friction between the worker's hand and the adjusting ring 2 can be enhanced, thereby ensuring the stability of the worker's rotation of the adjusting ring 2 and preventing it from becoming loose.

[0034] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A mechanically-set, fishable, and drillable bridge plug, characterized in that: The bridge plug body and two groups of auxiliary parts installed outside the bridge plug body for enhancing the sealing performance; Both groups of auxiliary parts include a support ring (1) sleeved outside the bridge plug body, an adjusting ring (2) sleeved outside one end of the support ring (1) close to the bridge plug body, and a fixing ring (3) sleeved outside one end of the adjusting ring (2) away from the bridge plug body. The fixing ring (3) is internally provided with a top sealing ring (4) and a bottom sealing ring (5), the top sealing ring (4) is fixed with the inner wall of the fixing ring (3) outside, and the adjusting ring (2) is arranged between the top sealing ring (4) and the bottom sealing ring (5) away from the support ring (1).

2. The mechanically-set, drillable, fishable bridge plug of claim 1, wherein: The bridge plug body includes a rubber sleeve (6), the rubber sleeve (6) is respectively provided with a top joint (7) and a bottom joint (8) at both ends, the top joint (7) and the bottom joint (8) are respectively provided with a drillable slip (9) close to one side of the rubber sleeve (6), the drillable slip (9) is provided with a composite vertebra (10) close to one side of the rubber sleeve (6), the composite vertebra (10) is provided with a composite sheet (11) away from one end of the rubber sleeve (6). The support ring (1) is sleeved outside one end of the rubber sleeve (6) close to the composite sheet (11), and the fixing ring (3) and the bottom sealing ring (5) are arranged on one side of the composite sheet (11) close to the rubber sleeve (6).

3. The mechanically-set, drillable, fishable bridge plug of claim 1, wherein: The inner side wall of one end of the top sealing ring (4) close to the adjusting ring (2) and the outer wall of one end of the bottom sealing ring (5) close to the adjusting ring (2) are both inclined.

4. The mechanically-set, drillable, fishable bridge plug of claim 1, wherein: The outer side wall and the inner side wall of one end of the adjusting ring (2) away from the support ring (1) are both inclined, and the adjusting ring (2) is in contact with the inclined surfaces on the top sealing ring (4) and the bottom sealing ring (5) away from the top and the bottom of the support ring (1) respectively.

5. The mechanically-set, drillable, fishable bridge plug of claim 2, wherein: The outer end of the support ring (1) close to the rubber sleeve (6) is internally provided with an internal thread (12), the inner wall of one end of the adjusting ring (2) close to the rubber sleeve (6) is externally provided with an external thread (13), and the adjusting ring (2) is threadedly connected with the support ring (1).

6. The mechanically-set, drillable, fishable bridge plug of claim 2, wherein: The composite sheet (11) is internally provided with a ring groove (14) corresponding to one end of the rubber sleeve (6), the ring groove (14) is internally provided with an inner sealing ring (15), and the inner sealing ring (15) is sleeved outside one end of the rubber sleeve (6) close to the composite sheet (11).

7. The mechanically-set, drillable, fishable bridge plug of claim 2, wherein: The adjusting ring (2) is externally provided with a plurality of anti-skid strips (16) close to one end of the rubber sleeve (6).

8. The mechanically-set, drillable, fishable bridge plug of claim 7, wherein: The plurality of anti-skid strips (16) are uniformly and spacedly distributed.

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