Thermal recovery packer

Abstract

The utility model discloses a thermal recovery packer. A pressing cylinder is sleeved on a central pipe and is arranged close to the upper end of the central pipe, a locking ring sleeve is sleeved on the central pipe and is arranged behind the pressing cylinder, a locking ring is sleeved on the central pipe and is arranged in the locking ring sleeve, and a connecting sleeve is sleeved on the central pipe and is arranged behind the locking ring sleeve. By adopting the high-temperature glue barrel made of the novel composite material, the high-temperature glue barrel not only keeps good stability in a high-temperature environment, but also can still keep excellent sealing performance after temperature alternation. In addition, the special coating design on the surface of the rubber barrel effectively prevents gouges in the tripping-in process, so that the service life of the packer is prolonged, and the maintenance cost is reduced. And meanwhile, the sealing reliability is further enhanced by using the disc spring, and the stable performance of the packer under the complex formation pressure change is ensured. By means of the technical improvement, the thermal recovery packer can provide more stable and efficient thermal recovery operation, and therefore the recovery efficiency of heavy oil reservoirs is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal recovery packers, and particularly provides a thermal recovery packer. Background Technique

[0002] Heavy oil resources are widely distributed globally, and their exploitation is difficult. Therefore, thermal oil recovery technology has become the key means to improve the recovery efficiency of heavy oil reservoirs. As an indispensable device in the thermal oil recovery process, the performance of the thermal recovery packer directly affects the stability and efficiency of the entire oil recovery system.

[0003] In a high-temperature environment, due to insufficient heat resistance, traditional rubber sealing components are prone to softening and aging, resulting in a decline in sealing performance and an inability to maintain a good isolation effect for a long time. To solve this problem, metal sealing components are generally used at present. However, when facing changes in thermal stress and formation pressure, metal sealing components are prone to deformation, which affects the sealing effect, makes the isolation performance of the packer unstable, and further affects the continuity and reliability of the entire thermal recovery operation.

[0004] Therefore, based on the above technical problems, it is necessary for those skilled in the art to develop a thermal recovery packer. Content of the Utility Model

[0005] The purpose of the utility model is to provide a thermal recovery packer to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A technical solution for a thermal recovery packer, comprising a pressure cylinder, a central pipe, a lock ring sleeve, a lock ring anti-rotation pin, a lock ring, a connecting sleeve, a shear pin, an adjusting ring, an outer shoulder, an inner shoulder, a high-temperature rubber barrel one, a high-temperature rubber barrel two, a high-temperature rubber barrel three, a high-temperature rubber barrel four, a high-temperature rubber barrel five, a disc spring sleeve, a disc spring, a support sleeve, a slip setting pin, an upper cone, a retaining ring one, a slip cover, a leaf spring, a slip, a slip cover pin, a guide pin, a lower cone, a lower connecting sleeve, a release outer sleeve, a lower retaining ring, a split release ring, a release inner sleeve, a release pin, a lower joint, an upper joint, an upper central pipe, an upper piston sleeve, an upper piston, a lower piston sleeve, a lower piston, a push cylinder, an anti-rotation key, a retaining ring two, a connecting head, a centering spring, a lower central pipe, a spring support sleeve, a snap ring back ring, a snap ring, a release pin, a locking claw, a support claw, a centering guide block, a skeleton seal ring, a sealing joint, a flexible short joint, a back-tightening ring, a ball seat, a steel ball, a short joint. The pressure cylinder is sleeved on the central pipe and is arranged near the upper end of the central pipe. The lock ring sleeve is sleeved on the central pipe and is behind the pressure cylinder. The lock ring is sleeved on the central pipe and is in the lock ring sleeve. The connecting sleeve is sleeved on the central pipe and is behind the lock ring sleeve. The outer shoulder, the inner shoulder, the high-temperature rubber barrel one, the high-temperature rubber barrel two, the high-temperature rubber barrel three, the high-temperature rubber barrel four, the high-temperature rubber barrel five are sleeved on the central pipe and are behind the connecting sleeve. The disc spring sleeve is sleeved on the central pipe and is behind the high-temperature rubber barrel five. The disc spring is sleeved on the central pipe and is in the disc spring sleeve. The upper cone, the slip cover, the lower cone are sleeved on the central pipe and are behind the disc spring sleeve. The slip is between the upper cone and the lower cone and is embedded in the slip cover. The lower connecting sleeve is threadedly connected to the lower cone. The release inner sleeve is sleeved in the lower connecting sleeve. The lower joint is threadedly connected to the lower connecting sleeve.

[0008] As a preferred technical solution, the upper joint is threadedly connected to the upper central pipe. The upper piston sleeve is sleeved on the upper central pipe and is behind the upper joint. The upper piston sleeve is sleeved on the upper central pipe and is outside the upper piston and is threadedly connected to the upper joint. The lower piston sleeve is sleeved on the upper central pipe and is behind the upper piston sleeve. The lower piston is located in the lower piston sleeve. The push cylinder is located in the lower piston sleeve and is behind the lower piston. The connecting head is threadedly connected to the upper central pipe and is behind the upper central pipe. The lower central pipe is threadedly connected to the connecting head and is behind the connecting head. The locking claw, the support claw, the centering guide block are sleeved on the lower central pipe. The sealing joint is threadedly connected to the lower central pipe and is behind the lower central pipe. The snap ring back ring, the snap ring are sleeved on the lower central pipe.

[0009] As a preferred technical solution, the lock ring adopts a two-way structure, which can effectively prevent the rubber barrel from retreating.

[0010] As a preferred technical solution, the high-temperature glue barrels one, two, three, four, and five are made of a new composite material, which can have good stability in a high-temperature environment, ensure good sealing performance of the high-temperature glue barrels after temperature alternation, and a coating is provided on the surface of the glue barrels to ensure that the glue barrels are not bruised during the lowering process.

[0011] As a preferred technical solution, the disc spring can effectively increase the sealing reliability.

[0012] As a preferred technical solution, there are guide pins in the lower cone to prevent the cone from rotating.

[0013] As a preferred technical solution, the releasing outer sleeve and the releasing inner sleeve are connected by a releasing pin. When the releasing inner sleeve is lifted to cut off the releasing pin and the split releasing ring falls off, the lower cone can be released after being released.

[0014] As a preferred technical solution, there is a sandwich cavity between the upper piston and the upper central pipe, which can reduce the number of pistons while increasing the thrust.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The present utility model is a thermal recovery packer. By using high-temperature glue barrels made of a new composite material, it not only maintains good stability in a high-temperature environment, but also can still maintain excellent sealing performance after temperature alternation. In addition, the special coating design on the surface of the glue barrels effectively prevents bruising during the lowering process, thereby extending the service life of the packer and reducing the maintenance cost. At the same time, the use of disc springs further enhances the sealing reliability and ensures the stable performance of the packer under complex formation pressure changes. Through these technical improvements, the thermal recovery packer of the present utility model can provide more stable and efficient thermal recovery operations, thereby significantly improving the recovery efficiency of heavy oil reservoirs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the upper structure of the well-retained tool of the present utility model

[0018] Figure 2 It is a schematic diagram of the lower structure of the well-retained tool of the present utility model;

[0019] Figure 3 It is a schematic diagram of the upper structure of the service tool of the present utility model;

[0020] Figure 4 It is a schematic diagram of the lower structure of the service tool of the present utility model.

[0021] In the attached drawing reference numerals: 1, pressure cylinder; 2, central tube; 3, lock ring sleeve; 4, anti-rotation pin for lock ring; 5, lock ring; 6, connecting sleeve; 7, shear pin; 8, adjusting ring; 9, outer shoulder; 10, inner shoulder; 11, high-temperature glue bucket I; 12, high-temperature glue bucket II; 13, high-temperature glue bucket III; 14, high-temperature glue bucket IV; 15, high-temperature glue bucket V; 16, disc spring sleeve; 17, disc spring; 18, support sleeve; 19, slip setting pin; 20, upper cone; 21, retaining ring I; 22, slip cover; 23, leaf spring; 24, slip; 25, slip cover pin; 26, guide pin; 27, lower cone; 28, lower connecting sleeve; 29, releasing outer sleeve; 30, lower retaining ring; 31, split releasing ring; 32, releasing inner sleeve; 33, releasing pin; 34, lower sub; 35, upper sub; 36, upper central tube; 37, upper piston sleeve; 38, upper piston; 39, lower piston sleeve; 40, lower piston; 41, push cylinder; 42, anti-rotation key; 43, retaining ring II; 44, connector; 45, centralizing spring; 46, lower central tube; 47, spring support sleeve; 48, snap ring back ring; 49, snap ring; 50, release pin; 51, locking claw; 52, support claw; 53, centralizing guide block; 54, skeleton seal ring; 55, sealing joint; 56, flexible sub; 57, back-tightening ring; 58, ball seat; 59, steel ball; 60, sub. Detailed implementation manners

[0022] The features and exemplary embodiments of various aspects of the present utility model will be described in detail below. For the purpose of making the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the attached drawings and specific embodiments. For those skilled in the art, the present utility model can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present utility model by showing examples of the present utility model.

[0023] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, the utility model provides a technical solution for a thermal recovery packer: The pressure cylinder 1 is sleeved on the central tube 2 and is arranged near the upper end of the central tube 2. The lock ring sleeve 3 is sleeved on the central tube 2 and is behind the pressure cylinder 1. The lock ring 5 is sleeved on the central tube 2 and is in the lock ring sleeve 3. The connecting sleeve 6 is sleeved on the central tube 2 and is behind the lock ring sleeve 3. The outer shoulder 9, the inner shoulder 10, the high-temperature rubber barrel one 11, the high-temperature rubber barrel two 12, the high-temperature rubber barrel three 13, the high-temperature rubber barrel four 14, and the high-temperature rubber barrel five 15 are sleeved on the central tube 2 and are behind the connecting sleeve 6. The disc spring sleeve 16 is sleeved on the central tube 2 and is behind the high-temperature rubber barrel five 15. The disc spring 17 is sleeved on the central tube 2 and is in the disc spring sleeve 16. The upper cone 20, the slip housing 22, and the lower cone 27 are sleeved on the central tube 2 and are behind the disc spring sleeve 16. The slips 24 are between the upper cone 20 and the lower cone 27 and are embedded in the slip housing 22. The lower connecting sleeve 28 is threadedly connected to the lower cone 27. The unseating inner sleeve 32 is sleeved in the lower connecting sleeve 28. The lower joint 34 is threadedly connected to the lower connecting sleeve 28.

[0024] Among them, the upper joint 35 is threadedly connected to the upper central tube 36. The upper piston 38 is sleeved on the upper central tube 36 and is behind the upper joint 35. The upper piston sleeve 37 is sleeved on the upper central tube 36 and is outside the upper piston 38 and is threadedly connected to the upper joint 35. The lower piston sleeve 39 is sleeved on the upper central tube 36 and is behind the upper piston sleeve 37. The lower piston 40 is located inside the lower piston sleeve 39. The push cylinder 41 is located inside the lower piston sleeve 39 and is behind the lower piston 40. The connecting head 44 is threadedly connected to the upper central tube 36 and is behind the upper central tube 36. The lower central tube 46 is threadedly connected to the connecting head 44 and is behind the connecting head 44. The lock claws 51, the support claws 52, and the centering and guiding block 53 are sleeved on the lower central tube 46. The sealing joint 55 is threadedly connected to the lower central tube 46 and is behind the lower central tube 46. The snap ring back ring 48 and the snap ring 49 are sleeved on the lower central tube 46.

[0025] Among them, the lock ring 5 adopts a two-way structure, which can effectively prevent the rubber barrel from retreating.

[0026] The high-temperature rubber barrel one 11, the high-temperature rubber barrel two 12, the high-temperature rubber barrel three 13, the high-temperature rubber barrel four 14, and the high-temperature rubber barrel five 15 adopt a new composite material, which can have good stability in a high-temperature environment, ensure that the high-temperature rubber barrel still has good sealing performance after temperature alternation, and a coating is provided on the surface of the rubber barrel to ensure that the rubber barrel is not damaged during the lowering process.

[0027] The disc spring 17 can effectively increase the sealing reliability.

[0028] There is a guide pin 26 inside the lower cone 27, which can prevent the cone from rotating.

[0029] The unseating outer sleeve 29 and the unseating inner sleeve 32 are connected by an unseating pin 33. When the unseating inner sleeve 32 is lifted, the unseating pin 33 is cut off. After the split unseating ring 31 falls off, the lower cone 27 is released and can be unseated.

[0030] There is a sandwich wall cavity between the upper piston 38 and the upper central tube 36, which can reduce the number of pistons while increasing the thrust.

[0031] Under normal working conditions, the high-temperature rubber barrels 11-15 maintain good stability in a high-temperature environment and still maintain excellent sealing performance after temperature alternation. The special coating design on the surface of the rubber barrel effectively prevents damage during the lowering process. The two-way structure of the lock ring sleeve 3 and the lock ring 5 can effectively prevent the rubber barrel from retreating, ensuring the stability and sealing performance of the packer. The disc spring 17 in the disc spring sleeve 16 can effectively increase the sealing reliability and ensure the stable performance of the packer under complex formation pressure changes. The guide pin 26 is provided in the lower cone 27 to prevent the cone from rotating and ensure the correct operation of the packer. The unseating inner sleeve 32 and the unseating outer sleeve 29 are connected by the unseating pin 33. When the unseating inner sleeve is lifted to cut the unseating pin, after the split unseating ring 31 falls off, the lower cone 27 can be released to unseal. There is a sandwich wall cavity between the upper piston 38 and the upper central tube 36, which can reduce the number of pistons while increasing the thrust.

[0032] Lower the thermal recovery packer to the predetermined oil well position through the drill pipe. Apply pressure to the packer through the surface equipment to make the high-temperature rubber barrels 11-15 expand and closely fit the well wall to achieve sealing. When it is necessary to release the seal, lift the unseating inner sleeve 32 to cut the unseating pin 33, so that after the split unseating ring 31 falls off, the lower cone 27 is released, thereby releasing the seal.

[0033] Through the above embodiments, the thermal recovery packer of the present utility model can provide a more stable and efficient thermal recovery operation, significantly improving the recovery efficiency of heavy oil reservoirs.

[0034] The working principle and usage process of the present utility model: After assembling the components of this solution in sequence, work according to the above embodiments in sequence according to actual needs, which are all the working steps.

[0035] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.

[0036] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0037] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] According to the embodiments of the present utility model as described above, these embodiments do not elaborate on all the details, nor do they limit the present utility model to only the specific embodiments. Obviously, according to the above description, many modifications and variations can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present utility model, so that those skilled in the relevant technical field can make good use of the present utility model and its modified use based on the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A thermal recovery packer, characterized in that, Including a pressure cylinder (1), a central tube (2), a lock ring sleeve (3), a lock ring anti-rotation pin (4), a lock ring (5), a connecting sleeve (6), a shear pin (7), an adjusting ring (8), an outer shoulder (9), an inner shoulder (10), a high-temperature glue bucket one (11), a high-temperature glue bucket two (12), a high-temperature glue bucket three (13), a high-temperature glue bucket four (14), a high-temperature glue bucket five (15), a disc spring sleeve (16), a disc spring (17), a support sleeve (18), a slip setting pin (19), an upper cone (20), a retaining ring one (21), a slip cover (22), a leaf spring (23), a slip (24), a slip cover pin (25), a guide pin (26), a lower cone (27), a lower connecting sleeve (28), a releasing outer sleeve (29), a lower retaining ring (30), a split releasing ring (31), a releasing inner sleeve (32), a releasing pin (33), a lower sub (34), an upper sub (35), an upper central tube (36), an upper piston sleeve (37), an upper piston (38), a lower piston sleeve (39), a lower piston (40), a push cylinder (41), an anti-rotation key (42), a retaining ring two (43), a connector (44), a centralizing spring (45), a lower central tube (46), a spring support sleeve (47), a snap ring back ring (48), a snap ring (49), a release pin (50), a locking claw (51), a support claw (52), a centralizing guide block (53), a skeleton seal ring (54), a sealing joint (55), a flexible sub (56), a back-tightening ring (57), a ball seat (58), a steel ball (59), a sub (60). The pressure cylinder (1) is sleeved on the central tube (2) and is arranged near the upper end of the central tube (2). The lock ring sleeve (3) is sleeved on the central tube (2) and is behind the pressure cylinder (1). The lock ring (5) is sleeved on the central tube (2) and is in the lock ring sleeve (3). The connecting sleeve (6) is sleeved on the central tube (2) and is behind the lock ring sleeve (3). The outer shoulder (9), the inner shoulder (10), the high-temperature glue bucket one (11), the high-temperature glue bucket two (12), the high-temperature glue bucket three (13), the high-temperature glue bucket four (14), and the high-temperature glue bucket five (15) are sleeved on the central tube (2) and are behind the connecting sleeve (6). The disc spring sleeve (16) is sleeved on the central tube (2) and is behind the high-temperature glue bucket five (15). The disc spring (17) is sleeved on the central tube (2) and is in the disc spring sleeve (16). The upper cone (20), the slip cover (22), and the lower cone (27) are sleeved on the central tube (2) and are behind the disc spring sleeve (16). The slip (24) is between the upper cone (20) and the lower cone (27) and is embedded in the slip cover (22). The lower connecting sleeve (28) is threadedly connected to the lower cone (27). The releasing inner sleeve (32) is sleeved in the lower connecting sleeve (28). The lower sub (34) is threadedly connected to the lower connecting sleeve (28).

2. The thermal recovery packer according to claim 1, wherein: The upper joint (35) is threadedly connected to the upper central tube (36). The upper piston (38) is sleeved on the upper central tube (36). After the upper joint (35), the upper piston sleeve (37) is sleeved on the upper central tube (36) and is threadedly connected to the upper joint (35) outside the upper piston (38). The lower piston sleeve (39) is sleeved on the upper central tube (36). After the upper piston sleeve (37), the lower piston (40) is located inside the lower piston sleeve (39). The push cylinder (41) is located inside the lower piston sleeve (39) and is behind the lower piston (40). The connecting head (44) is threadedly connected to the upper central tube (36). After the upper central tube (36), the lower central tube (46) is threadedly connected to the connecting head (44). After the connecting head (44), the locking claw (51), the supporting claw (52), and the centralizing and guiding block (53) are sleeved on the lower central tube (46). The sealing joint (55) is threadedly connected to the lower central tube (46). After the lower central tube (46), the snap ring back ring (48) and the snap ring (49) are sleeved on the lower central tube (46).

3. The thermal recovery packer according to claim 1, wherein: The lock ring (5) adopts a two-way structure, which can effectively prevent the rubber cylinder from retreating.

4. The thermal recovery packer according to claim 3, characterized in that: The high-temperature rubber barrels one (11), two (12), three (13), four (14), and five (15) adopt a new composite material, which can have good stability in a high-temperature environment, ensure good sealing performance of the high-temperature rubber barrels after temperature alternation, and a coating is provided on the surface of the rubber barrels to ensure that the rubber barrels are not bruised during the lowering process.

5. The hot production packer according to claim 4, wherein: The disc spring (17) can effectively increase the sealing reliability.

6. The hot production packer according to claim 2, characterized in that: There is a guide pin (26) inside the lower cone (27), which can prevent the cone from rotating.

7. The thermal recovery packer according to claim 2, characterized in that: The releasing outer sleeve (29) is connected to the releasing inner sleeve (32) through a releasing pin (33). When the releasing inner sleeve (32) is lifted to cut off the releasing pin (33), after the split releasing ring (31) falls off, the lower cone (27) can be released to achieve releasing.

8. The thermal recovery packer according to claim 2, wherein: There is a sandwich cavity between the upper piston (38) and the upper central tube (36), which can reduce the number of pistons while increasing the thrust.

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