Large-drift-diameter drillable bridge plug

Abstract

The utility model belongs to the technical field of bridge plugs, and discloses a large-drift-diameter drillable bridge plug which comprises a bridge plug body, a first sealer is fixedly arranged on the outer side of the bridge plug body, a motor is fixedly arranged in the bridge plug body, and a fixing plate is fixedly arranged on the bottom face of the motor. A main gear is fixedly arranged at the tail end of a main shaft of the fixing plate, an auxiliary gear is connected to the outer side of the main gear in a meshed mode, a sliding groove is formed in the auxiliary gear, a sliding shaft is arranged in the sliding groove in a sliding mode, a fixing shaft is fixedly arranged on the outer side of the sliding shaft, and a push plate is fixedly arranged on the outer side of the fixing shaft. The sealing performance of the bridge plug is improved, so that the isolation effect of the bridge plug becomes better, the phenomenon that fluid flows from one area to another area is avoided, and it is guaranteed that underground pressure and fluid flowing are in a controllable state all the time.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge plugs, in particular to a large-diameter drillable bridge plug. Background Art

[0002] A bridge plug is a downhole tool used to seal oil and gas wells. It is mainly used to create a sealed barrier in the wellbore to isolate different formations or well sections. The bridge plug has the characteristics of fewer construction steps, short cycle, and accurate sealing position. It is divided into permanent bridge plugs and removable bridge plugs. While dividing different areas, the bridge plug also needs to ensure the pressure inside the wellbore and the flow of fluids in different areas. Therefore, the sealing of the bridge plug must be good. Poor sealing is likely to lead to the risk of uncontrolled blowout, reduced operating efficiency, stuck oil pipes, and the need for salvage.

[0003] At the same time, the patent specification with announcement number CN 211598601 U discloses a large-diameter drillable bridge plug, including a plunger cylinder, a cover plate fixed to the top of the plunger cylinder, a second water inlet pipe passing through the top of the cover plate, a column tube fixed to the inner bottom of the plunger cylinder, a first fixed plate fixed to the top of the column tube, a second fixed plate and a third fixed plate fixed on the inner wall of the column tube, two second fixed plates are provided, and the same rotating shaft passes through the first, second and third fixed plates, an axial flow blade is fixedly installed on the rotating shaft, and the axial flow blade is located between the two second fixed plates.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned large-diameter drillable bridge plug had the following problems: the sealing facility of the utility model did not perform sufficiently, and the diameter of its sealing device could not be expanded. As a result, when the bridge plug was installed, the sealer would always rub against the well pipe, and when it reached the designated position, it was very likely that the sealing device would malfunction and be unable to perform effective sealing.

[0005] Therefore, in order to solve the above problems, a large-diameter drillable bridge plug is proposed. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the utility model provides a large-diameter drillable bridge plug with the advantage of strong sealing. The utility model increases the sealing of the bridge plug, thereby making its isolation effect better, avoiding the phenomenon of fluid flowing from one area to another, and ensuring that the downhole pressure and fluid flow are always in a controllable state.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-diameter drillable bridge plug, comprising a bridge plug body, a first sealer fixedly provided on the outer side of the bridge plug body, a motor fixedly provided inside the bridge plug body, a fixing plate fixedly provided on the bottom surface of the motor, a main gear fixedly provided on the main shaft end of the fixing plate, a sub-gear connected to the outer teeth of the main gear, a slide groove provided inside the sub-gear, a sliding shaft slidingly provided inside the slide groove, a fixed shaft fixedly provided on the outer side of the sliding shaft, a push plate fixedly provided on the outer side of the fixed shaft, and the push plate is in contact with the first sealer.

[0008] Preferably, a second sealer is fixedly provided on the other side of the bridge plug body, and another push plate is provided inside the second sealer.

[0009] Preferably, a limit plate is fixedly provided on the bottom surface of the fixed shaft, and the limit plate is slidably connected to the bridge plug body.

[0010] Preferably, the outer side of the first sealer is fitted with a well body, and the second sealer is fitted with the well body.

[0011] Preferably, a cone is fixedly provided on one side of the bridge plug body, and a first slip is slidably provided on the outer side of the cone.

[0012] Preferably, a slip tooth is slidingly provided inside the first slip, and the slip tooth is in contact with the well body, and a traction tube is fixedly provided on the other side of the first slip.

[0013] Preferably, a second slip is fixedly provided on the other side of the bridge plug body, and the second slip is in contact with the well body.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model drives the main gear on the outside of the motor through the fixed plate, the main gear drives the sub-gear, the sub-gear drives the slide groove, the slide groove drives the sliding shaft, the sliding shaft drives the fixed shaft to slide, and the fixed shaft drives the push plate. The push plate pushes the first sealer and the second sealer on the outside while sliding, so that they fit tightly with the well body, thereby increasing its sealing. The utility model increases the sealing performance of the bridge plug, thereby making its isolation effect better, avoiding the phenomenon of fluid flowing from one area to another, and ensuring that the downhole pressure and fluid flow are always in a controllable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a large-diameter drillable bridge plug proposed in the utility model;

[0017] Figure 2This is a schematic diagram of the cross-sectional structure of the bridge plug body proposed in the present invention;

[0018] Figure 3 This is a schematic diagram of the main gear installation structure proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the sliding shaft installation structure proposed by the utility model;

[0020] Figure 5 This is a schematic diagram of the motor installation structure proposed in this utility model.

[0021] In the figure: 1. Bridge plug body; 2. Cone; 3. First slip; 4. Slip teeth; 5. Traction tube; 6. Second slip; 7. Hoistway body; 8. First sealer; 9. Second sealer; 10. Motor; 11. Fixed plate; 12. Main gear; 13. Sub gear; 14. Slide groove; 15. Sliding shaft; 16. Fixed shaft; 17. Push plate; 18. Limit plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figures 1 to 5 As shown, the utility model provides a large-diameter drillable bridge plug, including a bridge plug body 1, a first sealer 8 is fixedly provided on the outer side of the bridge plug body 1, a motor 10 is fixedly provided inside the bridge plug body 1, a fixing plate 11 is fixedly provided on the bottom surface of the motor 10, a main gear 12 is fixedly provided on the main shaft end of the fixing plate 11, the outer side of the main gear 12 is meshed with a sub-gear 13, a slide groove 14 is provided inside the sub-gear 13, a sliding shaft 15 is slidably provided inside the slide groove 14, a fixed shaft 16 is fixedly provided on the outer side of the sliding shaft 15, a push plate 17 is fixedly provided on the outer side of the fixed shaft 16, and the push plate 17 is fixedly provided with the push plate 17. The first sealer 8 is fitted, and the fixed plate 11 drives the main gear 12 on the outside of the motor 10. The main gear 12 drives the sub-gear 13, the sub-gear 13 drives the slide 14, the slide 14 drives the sliding shaft 15, the sliding shaft 15 drives the fixed shaft 16 to slide, and the fixed shaft 16 drives the push plate 17. The push plate 17 pushes the first sealer 8 and the second sealer 9 on the outside while sliding, so that it fits tightly with the inside of the wellbore to increase its sealing, thereby making its isolation effect better, avoiding the phenomenon of fluid flowing from one area to another, and ensuring that the downhole pressure and fluid flow are always in a controllable state.

[0024] Specifically, a second sealer 9 is fixedly provided on the other side of the bridge plug body 1 , and another push plate 17 is provided inside the second sealer 9 . The second sealer 9 can seal another area.

[0025] Furthermore, a limit plate 18 is fixedly provided on the bottom surface of the fixed shaft 16 , and the limit plate 18 is slidably connected to the bridge plug body 1 , and the limit plate 18 is used for limiting the fixed shaft 16 .

[0026] Furthermore, the outer side of the first sealer 8 is fitted with the well body 7, and the second sealer 9 is fitted with the well body 7. The first sealer 8 and the second sealer 9 seal the well body 7 at the same time, thereby enhancing its sealing performance.

[0027] It is worth noting that a cone 2 is fixedly provided on one side of the bridge plug body 1, and a first slip 3 is slidably provided on the outer side of the cone 2. The first slip 3 is mainly used to fix the entire device.

[0028] It is worth noting that the first cava 3 is internally slidingly provided with a cava tooth 4, and the cava tooth 4 is in contact with the well body 7. A traction tube 5 is fixedly provided on the other side of the first cava 3. The traction tube 5 is used to move the bridge plug body 1 to the designated installation position. When the first cava 3 slides, it will push the outer cava tooth 4 to slide outward, thereby grasping the inside of the well body 7.

[0029] It is worth mentioning that a second slip 6 is fixedly provided on the other side of the bridge plug body 1, and the second slip 6 is in contact with the well body 7, and both sides are fixed at the same time to increase its stability.

[0030] Among them, the motor 11 is the existing technology and will not be described in detail. At the same time, the utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail. The "front, back, left and right" perspectives of this device are as follows: Figure 1 The direction shown in the figure is the reference.

[0031] Working principle and process:

[0032] When using a large-diameter drillable bridge plug, first, the bridge plug body 1 and its associated components are sent to the specified position inside the well body 7 through the traction tube 5, and then the first slip 3 and the second slip 6 move toward the bridge plug body 1 at the same time. The slip teeth 4 will open under the action of the cone 2, and at the same time, they will firmly grasp the well body 7 to fix the entire device. Then, the switch of the fixing plate 11 is turned on, and the fixing plate 11 drives the main gear 12 on the outside of the motor 10, and the main gear 12 drives the sub-gear 13, and the sub-gear 13 drives the chute 14, and the chute 14 drives the sliding shaft 15, and the sliding shaft 15 drives the fixed shaft 16 to slide, and the fixed shaft 16 drives The push plate 17 pushes the first sealer 8 and the second sealer 9 on the outside while sliding, so that they fit tightly with the well body 7, thereby increasing its sealing performance and preventing the fluid from flowing from one area to another, thereby achieving the purpose of controlling the downhole pressure and fluid flow. The limit plate 18 on the bottom of the fixed shaft 16 slides inside the bridge plug body 1 and at the same time has a limiting effect on it. The utility model increases the sealing performance of the bridge plug, thereby making its isolation effect better, avoiding the phenomenon of fluid flowing from one area to another, and ensuring that the downhole pressure and fluid flow are always in a controllable state.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter drillable bridge plug, comprising a bridge plug body (1), characterized in that: A first sealer (8) is fixedly provided on the outer side of the bridge plug body (1), a motor (10) is fixedly provided inside the bridge plug body (1), a fixing plate (11) is fixedly provided on the bottom surface of the motor (10), a main gear (12) is fixedly provided on the main shaft end of the fixing plate (11), the outer teeth of the main gear (12) are connected with a sub-gear (13), a sliding groove (14) is provided inside the sub-gear (13), a sliding shaft (15) is slidingly provided inside the sliding groove (14), a fixed shaft (16) is fixedly provided on the outer side of the sliding shaft (15), a push plate (17) is fixedly provided on the outer side of the fixed shaft (16), and the push plate (17) is fitted with the first sealer (8).

2. The large-diameter drillable bridge plug according to claim 1, characterized in that: A second sealer (9) is fixedly provided on the other side of the bridge plug body (1), and another push plate (17) is provided inside the second sealer (9).

3. The large-diameter drillable bridge plug according to claim 1, characterized in that: A limiting plate (18) is fixedly provided on the bottom surface of the fixed shaft (16), and the limiting plate (18) is slidably connected to the bridge plug body (1).

4. The large-diameter drillable bridge plug according to claim 1, characterized in that: The outer side of the first sealer (8) is fitted with the well body (7), and the second sealer (9) is fitted with the well body (7).

5. The large-diameter drillable bridge plug according to claim 1, characterized in that: A cone (2) is fixedly provided on one side of the bridge plug body (1), and a first slip (3) is slidably provided on the outer side of the cone (2).

6. The large-diameter drillable bridge plug according to claim 5, characterized in that: A slip tooth (4) is slidably provided inside the first slip (3), and the slip tooth (4) is in contact with the well body (7). A traction pipe (5) is fixedly provided on the other side of the first slip (3).

7. The large-diameter drillable bridge plug according to claim 1, characterized in that: A second slip (6) is fixedly provided on the other side of the bridge plug body (1), and the second slip (6) is in contact with the well body (7).

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