All-metal large-aperture soluble bridge plug

Abstract

The utility model relates to the field of underground tools in the petroleum and natural gas exploitation industry, in particular to an all-metal large-aperture soluble bridge plug which comprises the following components: a cone serving as a main stress component of the bridge plug and bearing the thrust of a push barrel of a setting tool, a sealing ring and a supporting ring sleeved at the bottom of the cone, and the sealing ring and the supporting ring are made of magnesium-based alloy materials; the lower joint is provided with a connecting ring, and the connecting ring is made of a magnesium-based alloy material; the slip comprises slip pieces and slip inserts, the slip pieces are eight in number, the sides of the slip pieces are spliced, the handles are arranged at the two ends of the slip pieces, the sealing ring and the supporting ring have better ductility by changing the content of magnesium, and a good sealing effect can be achieved even though the thin sealing ring and the thin supporting ring are used. Therefore, the inner drift diameter of the bridge plug is enlarged, and the handle rod is in threaded connection with the supporting ring and the connecting ring in a hinged mode, so that the using stability and reliability of the slip piece are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of downhole tools in the oil and gas exploitation industry, specifically a fully metal large-aperture soluble bridge plug. Background Art

[0002] In the oil and gas exploitation industry, a bridge plug is an important downhole tool, mainly used to separate different sections of the wellbore for operations such as staged fracturing, acidizing or other treatment measures. The performance of the bridge plug directly affects the safety and efficiency of downhole operations. However, there are some deficiencies in the design and material selection of traditional bridge plugs, which limit their application in complex geological conditions.

[0003] I. Poor sealing performance

[0004] Traditional bridge plugs have problems in terms of sealing performance. Especially in high-pressure and high-temperature environments, the sealing rings of the bridge plugs are prone to deformation or wear, resulting in a decline in the sealing effect and thus affecting the quality of downhole operations. In addition, the sealing ring design of some bridge plugs is not reasonable enough, resulting in incomplete fitting with the inner wall of the wellbore during setting, causing leakage.

[0005] II. Poor stability

[0006] The stability of the bridge plug in the wellbore is one of the key factors for its effective operation. Due to unreasonable slip design of traditional bridge plugs, with a small number of slip tiles and uneven distribution, or the material of the slip teeth not being hard enough, the bridge plug is not firmly fixed in the wellbore, prone to deviation or sliding, affecting the separation effect. In addition, the force distribution during the setting process of the bridge plug also affects its stability.

[0007] III. Insufficient wear resistance

[0008] In downhole operations, the bridge plug needs to withstand high pressure and abrasion. Traditional bridge plug materials have insufficient wear resistance. Especially in high-pressure and highly abrasive environments, the service life of the bridge plug is short, requiring frequent replacement, increasing the operation cost and time.

[0009] IV. Small inner diameter of existing soluble bridge plugs

[0010] With the development of oil and gas field development technology, the requirements for bridge plugs are getting higher and higher. Although existing soluble bridge plugs solve the problem of bridge plug recovery, due to their design limitations, the inner diameter is small, which is not conducive to backflow operations, that is, removing waste in the wellbore after downhole operations. The small inner diameter limits the fluid flow capacity and affects the efficiency of subsequent operations. Summary of the Utility Model

[0011] (I) Technical problems to be solved

[0012] In view of the deficiencies of the prior art, the present utility model provides a fully metal large-aperture soluble bridge plug.

[0013] (II) Technical Solution

[0014] To achieve the above object, the present utility model provides the following technical solution: The fully metal large-aperture soluble bridge plug of the present utility model includes the following components:

[0015] Cone: As the main force-bearing component of the bridge plug, it bears the thrust of the pushing barrel of the setting tool. A sealing ring and a support ring are sleeved at the bottom of the cone, and the sealing ring and the support ring are made of magnesium-based alloy materials;

[0016] Lower joint: A connecting ring is provided on the lower joint, and the connecting ring is made of magnesium-based alloy material;

[0017] Slips, the slips include slip pieces and slip teeth. There are eight slip pieces, and the sides of each slip piece are spliced. Handles are provided at both ends of the slip pieces. The handles are connected to the support ring and the connecting ring. A number of mounting holes are provided on the slip pieces, and the slip teeth are adapted to the mounting holes. The slip pieces are made of magnesium-based alloy materials.

[0018] Preferably, the mounting holes are inclined, and the slip teeth adopt a cylindrical structure.

[0019] Further preferably, the slip teeth are 3.5 mm high and 6 mm in diameter.

[0020] Most preferably, the slip teeth are made of ceramic materials, and the slip teeth are embedded in the mounting holes.

[0021] Preferably, the handles at both ends of the slip pieces are connected to the support ring and the connecting ring through a threaded structure.

[0022] Further preferably, hinge grooves are provided around the inner walls of the support ring and the connecting ring, and the handles are hinged in the hinge grooves through pin shafts.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, the present utility model provides a fully metal large-aperture soluble bridge plug, which has the following

[0025] beneficial effects:

[0026] Improve sealing performance:

[0027] Cone and seal ring design: The cone is the main force-bearing component of the bridge plug and bears the thrust of the setting tool pushing barrel. A seal ring and a support ring are sleeved at the bottom of the cone and are made of magnesium-based alloy material. By changing the content of magnesium, the seal ring and the support ring have better ductility, so that good sealing effect can be achieved even with thinner seal rings and support rings, thereby increasing the internal diameter of the bridge plug.

[0028] Improving stability:

[0029] Example 1 of the connection of the locking tiles: The two ends of the locking tiles are provided with handle bars, and the handle bars are connected to the support ring and the connecting ring through a threaded structure to ensure the stability and reliability of the locking tiles.

[0030] Example 1 of the connection of the locking tiles: Hinge design. Hinge grooves are provided around the inner walls of the support ring and the connecting ring, and the handle bars are hinged in the hinge grooves through pin shafts, allowing the locking tiles to open during setting and improving the stability of the bridge plug. Description of the drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0032] Figure 2 It is a schematic diagram of the threaded installation structure of the locking tiles in Example 1 of the present utility model;

[0033] Figure 3 It is a schematic diagram of the hinged installation structure of the locking tiles in Example 2 of the present utility model;

[0034] Figure 4 It is a schematic diagram of the locking tooth structure of the present utility model;

[0035] In the figure: 1, cone; 2, seal ring; 3, support ring; 4, locking tiles; 5, installation hole; 6, lower joint; 7, connecting ring; 8, handle bar; 9, locking tooth; 10, hinge groove; 11, pin shaft. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] Please refer to Figures 1-4 , the all-metal large-aperture soluble bridge plug of the present utility model includes the following components:

[0038] Cone 1: As the main force-bearing component of the bridge plug, it bears the thrust of the pushing barrel of the setting tool. A sealing ring 2 and a support ring 3 are sleeved at the bottom of the cone 1, and the sealing ring 2 and the support ring 3 are made of magnesium-based alloy material;

[0039] Lower joint 6: A connecting ring 7 is provided on the lower joint 6, and the connecting ring 7 is made of magnesium-based alloy material;

[0040] Slip, the slip includes slip segments 4 and slip teeth 9. The slip segments 4 are provided with eight petals, and the sides of each slip segment 4 are spliced. Pull rods 8 are provided at both ends of the slip segments 4. The pull rods 8 are connected to the support ring 3 and the connecting ring 7. A number of mounting holes 5 are provided on the slip segments 4, and the slip teeth 9 are adapted to the mounting holes 5. The slip segments 4 are made of magnesium-based alloy material.

[0041] The all-metal large-aperture soluble bridge plug improves its sealing performance, stability and wear resistance through optimized structural design, ensuring efficient sealing performance in oil well operations. Its specific working principle is as follows:

[0042] Cone 1:

[0043] Cone 1, as the main force-bearing component of the bridge plug, bears the thrust of the setting tool (such as a pushing barrel).

[0044] A sealing ring 2 and a support ring 3 are sleeved at the bottom of the cone 1. The sealing ring 2 and the support ring 3 are made of magnesium-based alloy material, having good ductility and strength.

[0045] When the bridge plug is set, after the cone 1 receives the thrust, it moves downward, pushing the sealing ring 2 and the support ring 3 to expand outward and tightly fit against the inner wall of the casing to achieve sealing.

[0046] Sealing ring 2 and support ring 3:

[0047] The sealing ring 2 and the support ring 3 are made of magnesium-based alloy material. By adjusting the content of magnesium, the material has better ductility.

[0048] Using thinner sealing ring 2 and support ring 3 can also achieve good sealing effect, thus increasing the inner diameter of the bridge plug.

[0049] The sealing ring 2 and the support ring 3 expand outward under the push of the cone 1 and tightly fit against the inner wall of the casing to form a seal.

[0050] Lower joint 6:

[0051] A connecting ring 7 is provided on the lower joint 6;

[0052] The connecting ring 7 is made of magnesium-based alloy material and has a relatively fast dissolution rate, which is convenient for separating from the slip after setting.

[0053] Slip:

[0054] The slips include slip pieces 4 and slip teeth 9. The slip pieces 4 are provided with eight petals, and the sides of each slip piece 4 are spliced together. The slip pieces 4 adopt an arc wedge shape, with a preferred length of 40 mm, a preferred width of 27 mm, and a preferred thickness of the thickest part of 14 mm.

[0055] Both ends of the slip pieces 4 are provided with handle bars 8, and the handle bars 8 are connected to the support ring 3 and the connecting ring 7.

[0056] A number of mounting holes 5 are provided on the slip pieces 4, and the slip teeth 9 are adapted to the mounting holes 5.

[0057] The mounting holes 5 are preferably inclined. The slip teeth 9 adopt a cylindrical structure, with a height of 3.5 mm and a diameter of 6 mm.

[0058] The slip teeth 9 preferably adopt a ceramic material and are inlaid in the mounting holes 5, having high hardness and wear resistance.

[0059] The slip pieces 4 adopt a magnesium-based alloy material, having good strength and corrosion resistance.

[0060] Embodiment 1 of the connection between the handle bar 8 and the support ring 3 and the connecting ring 7:

[0061] The handle bar 8 is connected to the support ring 3 and the connecting ring 7 through a threaded structure to ensure the stability and reliability of the slip pieces 4.

[0062] Embodiment 2 of the connection between the handle bar 8 and the support ring 3 and the connecting ring 7:

[0063] Hinged grooves 10 are provided in a surrounding manner on the inner walls of the support ring 3 and the connecting ring 7. The handle bar 8 is hinged in the hinged grooves 10 through a pin shaft 11, allowing the slip pieces 4 to open during setting, so that the slip teeth 9 on each petal tightly bite the casing wall to achieve the anchoring of the bridge plug.

[0064] Subsequent operations:

[0065] After the bridge plug is set, a soluble ball can be used to achieve wellbore sealing, further ensuring the sealing performance of the wellbore.

[0066] Summary

[0067] The all-metal large-aperture soluble bridge plug improves its sealing performance, stability and wear resistance by optimizing the design of each component, ensuring efficient sealing performance in oil well operations.

[0068] The all-metal large-aperture soluble bridge plug improves its sealing performance, stability and wear resistance by optimizing the design of each component, ensuring efficient sealing performance in oil well operations. The following are the specific beneficial effects of this device:

[0069] Improve sealing performance:

[0070] Design of the cone 1 and the sealing ring 2: The cone 1 is the main force-bearing component of the bridge plug and bears the thrust of the setting tool's pushing barrel. A sealing ring 2 and a support ring 3 are sleeved at the bottom of the cone 1, and they are made of magnesium-based alloy material. By changing the content of magnesium, the sealing ring 2 and the support ring 3 have better ductility, so that even with thinner sealing ring 2 and support ring 3, good sealing effect can be achieved, thus increasing the inner diameter of the bridge plug.

[0071] Ductility of the sealing ring 2: The sealing ring 2 and the support ring 3 are made of magnesium-based alloy material with good ductility. Through the pushing of the cone 1, the sealing ring 2 and the support ring 3 can expand outwards and closely fit onto the inner wall of the casing to form a seal.

[0072] Improve stability:

[0073] Slip design: The slips are of an integral structure and are divided into eight segments, and the interiors of each segment are connected together. The slip pieces 4 are made of magnesium-based alloy material, having good strength and corrosion resistance. The mounting holes 5 on the slip pieces 4 are preferably inclined. The slip teeth 9 are of a cylindrical structure, with a height of 3.5 mm and a diameter of 6 mm. The slip teeth 9 are preferably made of ceramic material and are embedded in the mounting holes 5, having high hardness and wear resistance. The slip teeth 9 bite the casing wall when the bridge plug is set to achieve anchoring.

[0074] Connection of the slip pieces 4: Rods 8 are provided at both ends of the slip pieces 4, and the rods 8 are connected to the support ring 3 and the connection ring 7 through a threaded structure to ensure the stability and reliability of the slip pieces 4.

[0075] Hinge design: Hinge grooves 10 are provided around the inner walls of the support ring 3 and the connection ring 7, and the rods 8 are hinged in the hinge grooves 10 through pins 11, allowing the slip pieces 4 to open during setting, improving the stability of the bridge plug.

[0076] Improve wear resistance:

[0077] Material selection of the slip teeth 9: The slip teeth 9 are made of ceramic material, having high hardness and wear resistance, and can effectively bite the casing wall to achieve anchoring and extend the service life of the bridge plug.

[0078] Material selection of the slip pieces 4: The slip pieces 4 are made of magnesium-based alloy material, having good strength and corrosion resistance, improving the overall wear resistance of the bridge plug.

[0079] Improve operation convenience:

[0080] Design of the lower sub 6: A connection ring 7 is provided on the lower sub 6, and the connection ring 7 is made of magnesium-based alloy material, facilitating connection with the setting tool. After the bridge plug is set, the lower sub 6 will separate from the slips, facilitating subsequent operations.

[0081] Improve maintenance convenience:

[0082] Soluble material: The material of the all-metal large-aperture soluble bridge plug is a soluble magnesium-based alloy, and the main components are metals such as magnesium, aluminum, zinc, and iron. By changing the content of magnesium, the ductility of the sealing ring 2 and the support ring 3 is better, which is convenient for maintenance and replacement.

[0083] Thread connection: The rod 8 at both ends of the slip tile 4 is connected to the support ring 3 and the connecting ring 7 through a threaded structure, which is convenient for disassembly and replacement and improves the convenience of maintenance.

[0084] Improve safety:

[0085] Design of the sealing ring 2 and the support ring 3: The sealing ring 2 and the support ring 3 are made of a magnesium-based alloy with good ductility. Even if the relatively thin sealing ring 2 and support ring 3 are used, a good sealing effect can be achieved, reducing the risk of leakage.

[0086] Slip design: The slip teeth 9 are made of ceramic material, which has high hardness and wear resistance, can effectively bite the casing wall, improve the stability of the bridge plug, and reduce the risk of the bridge plug falling off.

[0087] Improve service life:

[0088] Material selection of the slip teeth 9: The slip teeth 9 are made of ceramic material, which has high hardness and wear resistance, and extends the service life of the bridge plug.

[0089] Material selection of the slip tile 4: The slip tile 4 is made of a magnesium-based alloy material, which has good strength and corrosion resistance, and improves the overall wear resistance and service life of the bridge plug.

[0090] Improve adaptability:

[0091] Design of the cone 1: The cone 1 is made of a magnesium-based alloy material with a slow dissolution rate and is used to bear the thrust of the setting tool push barrel. After being subjected to the thrust, it moves downward, causing the sealing ring 2 and the support ring 3 to expand and closely adhere to the casing, playing a sealing role.

[0092] Design of the slip tile 4: The slip tile 4 is made of a magnesium-based alloy material and is connected through a threaded structure to ensure the stability and reliability of the slip tile 4. Hinged grooves 10 are provided around the inner walls of the support ring 3 and the connecting ring 7, and the rod 8 is hinged in the hinged groove 10 through a pin shaft 11, allowing the slip tile 4 to open during setting, improving the adaptability of the bridge plug.

[0093] Improve economic benefits:

[0094] Soluble material: The material of the all-metal large-aperture soluble bridge plug is a soluble magnesium-based alloy. By changing the content of magnesium, the ductility of the sealing ring 2 and the support ring 3 is better, reducing the material cost.

[0095] Maintenance convenience: The handlebars 8 at both ends of the card tile 4 are connected to the support ring 3 and the connecting ring 7 through a threaded structure, which is convenient for disassembly and replacement and reduces maintenance costs.

[0096] Summary

[0097] Through the summary of the above beneficial effects, it can be seen that the all-metal large-aperture soluble bridge plug improves its sealing performance, stability and wear resistance through optimized structural design, ensuring efficient sealing performance in oil well operations.

[0098] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. All-metal large-aperture soluble bridge plug, characterized by: Includes the following components: The cone (1) is a main force-bearing component of the bridge plug, bearing the thrust of the push barrel of the setting tool. The bottom of the cone (1) is sleeved with a sealing ring (2) and a support ring (3), and the sealing ring (2) and the support ring (3) are made of magnesium-based alloy material; Lower joint (6): a connecting ring (7) is provided on the lower joint (6), and the connecting ring (7) is made of a magnesium-based alloy material; A slip comprises a slip piece (4) and slip teeth (9), the slip piece (4) is provided with eight petals, and the sides of each slip piece (4) are spliced, handles (8) are provided at both ends of the slip piece (4), the handles (8) are connected to a support ring (3) and a connecting ring (7), a plurality of mounting holes (5) are provided on the slip piece (4), the slip teeth (9) are adapted to the mounting holes (5), and the slip piece (4) is made of a magnesium-based alloy material.

2. The all-metal large-aperture soluble bridge plug according to claim 1, characterized in that: The mounting hole (5) is arranged obliquely, and the slip teeth (9) are cylindrical in structure.

3. The all-metal large-aperture soluble bridge plug according to claim 2, characterized in that: The slip teeth (9) are 3.5 mm high and 6 mm in diameter.

4. The all-metal large-aperture soluble bridge plug according to claim 3 is characterized in that: The slip teeth (9) are made of ceramic material and are embedded in the mounting hole (5).

5. The all-metal large-aperture soluble bridge plug according to claim 4, characterized in that: The rods (8) at both ends of the slip sheet (4) are connected to the support ring (3) and the connecting ring (7) through a threaded structure.

6. The all-metal large-aperture soluble bridge plug according to claim 1, characterized in that: A hinge groove (10) is arranged around the inner wall of the support ring (3) and the connecting ring (7), and the handle bar (8) is hinged in the hinge groove (10) via a pin shaft (11).

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