Oil and gas well underground heating cable directional well installation protector

Abstract

The utility model discloses an oil and gas well underground heating cable directional well installation protector which comprises a heating cable body and an oil pumping pipe, a hexagonal lantern ring is fixedly sleeved on the outer surface of the middle of the heating cable body, a shell is fixedly installed in the middle of the side face of the hexagonal lantern ring, and a motor is fixedly installed on the inner surface of the shell. The output end of the motor is fixedly sleeved with a gear, the gear is rotationally installed in an inner cavity of the shell, the outer edge of the gear is meshed with two racks, the outer surfaces of the two racks are slidably installed on the inner surface of the shell, supporting blocks are fixedly installed at the ends, away from each other, of the two racks, and the side edges of the supporting blocks are attached to the inner wall of the oil pumping pipe. By arranging the hexagonal lantern ring, the rack and other structures, after wiring of the heating cable body is completed, the heating cable body is supported and limited in the middle of the oil pumping pipe through the rack, the supporting block and other structures, the whip effect is relieved or eliminated, the stability of connector connection is improved, and the actual heating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of directional well installation technology, and more specifically, to a directional well installation protector for downhole heating cables in oil and gas wells. Background Technology

[0002] During the extraction of heavy oil and high-pour-point oil, the crude oil contains a large amount of temperature-sensitive components such as paraffin wax. As the crude oil rises from the formation to the wellhead, its temperature gradually decreases. Especially in the low-temperature section near the surface, the paraffin wax in the crude oil is prone to precipitate and solidify, leading to a decrease in fluidity. This not only increases the operating load on the extraction equipment but may also cause pipeline blockage, severely affecting crude oil production.

[0003] To address this technical challenge, the commonly used solution is to install heating cables inside the oil well or sucker rod, continuously heating the crude oil by converting electrical energy into heat energy to compensate for temperature loss and improve its fluidity. However, in practical applications, it has been found that some existing heating cables are prone to swaying during crude oil flow. Due to the lack of effective intermediate fixing measures, excessively long free sections can easily create a "whiplash effect" (similar to a whip swinging), causing additional mechanical stress on the joints at both ends. This unstable swaying not only affects heating efficiency but may also lead to loosening of the cable connections, thereby impacting the reliability and safety of the system. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a directional well installation protector for downhole heating cables in oil and gas wells, so as to solve the problem that existing oil well heating cables, due to the lack of central fixation, are prone to shaking during crude oil flow, resulting in a "whiplash effect", which leads to increased joint stress and affects heating efficiency and system safety.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a directional well installation protector for downhole heating cables in oil and gas wells, comprising...

[0006] The heating cable body and the oil extraction pipe are provided. A hexagonal collar is fixedly sleeved on the outer surface of the middle part of the heating cable body. A housing is fixedly installed on the middle part of the side of the hexagonal collar. A motor is fixedly installed on the inner surface of the housing. A gear is fixedly sleeved on the output end of the motor. The gear is rotatably installed in the inner cavity of the housing. Two racks mesh with the outer edge of the gear. The outer surfaces of the two racks are slidably installed with the inner surface of the housing. The two racks are diagonally symmetrical about the center of the gear. A support block is fixedly installed at the ends of the two racks that are far apart from each other. The side edge of the support block is in contact with the inner wall of the oil extraction pipe.

[0007] The outer shell is provided in three parts, and the three outer shells are sequentially installed on three surfaces spaced apart by a hexagonal collar, with the three outer shells arranged in a circle about the center of the hexagonal collar.

[0008] The outer surface of the heating cable body is fitted with an interface reinforcement mechanism, and the inner surface of the end of the interface reinforcement mechanism away from the heating cable body is fixedly installed with the wiring cable body.

[0009] The interface reinforcement mechanism includes a fixing ring and a fixing seat. The middle part of the fixing ring is fixedly sleeved with the outer surface of the end of the heating cable body. The middle part of the fixing seat is fixedly sleeved with the outer surface of the top of the wiring cable body. Several fixing blocks are fixedly installed on the outer surface of the fixing seat. Each fixing block has a connecting block hinged to its end. Two arc-shaped side plates are fixedly installed on the top of two connecting blocks. There are six arc-shaped side plates, which are arranged in a circle about the center of the fixing seat. Two arc-shaped plates are fixedly installed on the side of the arc-shaped side plates near the wiring cable body. The two arc-shaped plates are respectively attached to the upper and lower surfaces of the fixing ring. Threaded sleeves are threadedly connected to the outer surface of the top of the six arc-shaped side plates.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] In the above scheme, by setting up structures such as hexagonal collars and racks, after the main body of the heating cable is wired and no longer needs to be stretched, the motor is started. The gear fixedly sleeved at its output end will rotate in the inner cavity of the shell, driving the two racks meshing on its outer edge to slide along the inner surfaces of the top and bottom of the shell respectively. The support blocks connected to the far ends of the two racks will move away from each other until they abut and fit against the inner wall of the oil extraction pipe. Thus, by using structures such as racks and support blocks, the main body of the heating cable is supported and limited in the middle of the oil extraction pipe, reducing or eliminating the "whiplash effect", improving the stability of the interface connection, and improving the actual heating efficiency.

[0012] In the above solution, by setting up an interface reinforcement mechanism, the threaded sleeve is first passed through the end of the heating cable body, and then the heating cable body is inserted into the wiring cable body. Next, the six arc-shaped side plates are brought together upwards, so that the inner arc-shaped plate abuts against the outer surface of the heating cable body and cooperates with the fixing ring to form a snap-fit ​​effect. Finally, the threaded sleeve is screwed onto the outside of the arc-shaped side plates for fixed positioning. Thus, the interface reinforcement mechanism is used to reinforce the interface between the heating cable body and the wiring cable body. The operation is simple and easy to disassemble and assemble. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the oil extraction tube, hexagonal collar, etc. of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the outer shell, motor, gears, etc. of this utility model;

[0016] Figure 4 This is a schematic diagram of the main body of the wiring cable and the interface reinforcement mechanism of this utility model.

[0017] [Figure Labels]

[0018] 1. Heating cable body; 2. Wiring cable body; 3. Interface reinforcement mechanism; 30. Fixing ring; 31. Fixing seat; 32. Fixing block; 33. Connecting block; 34. Arc-shaped side plate; 35. Arc-shaped plate; 36. Threaded sleeve; 4. Oil suction pipe; 5. Hexagonal collar; 6. Outer shell; 7. Motor; 8. Gear; 9. Rack; 10. Support block. Detailed Implementation

[0019] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0020] As attached Figure 1 To be continued Figure 4 An embodiment of this utility model provides a directional well installation protection device for downhole heating cables in oil and gas wells, including...

[0021] The heating cable body 1 and the oil extraction pipe 4 are provided. A hexagonal collar 5 is fixedly sleeved on the outer surface of the middle part of the heating cable body 1. A housing 6 is fixedly installed on the middle part of the side of the hexagonal collar 5. A motor 7 is fixedly installed on the inner surface of the housing 6. A gear 8 is fixedly sleeved on the output end of the motor 7. The gear 8 is rotatably installed in the inner cavity of the housing 6. Two racks 9 mesh with the outer edge of the gear 8. The outer surfaces of the two racks 9 are slidably installed with the inner surface of the housing 6. The two racks 9 are diagonally symmetrical about the center of the gear 8. A support block 10 is fixedly installed at the ends of the two racks 9 that are far apart from each other. The side edge of the support block 10 is in contact with the inner wall of the oil extraction pipe 4.

[0022] The outer shell 6 is provided in three parts, and the three outer shells 6 are installed sequentially on three surfaces spaced apart by the hexagonal collar 5. The three outer shells 6 are arranged in a circle about the center of the hexagonal collar 5.

[0023] Among them, the outer surface of the end of the heating cable body 1 is sleeved with an interface reinforcement mechanism 3, and the inner surface of the end of the interface reinforcement mechanism 3 away from the heating cable body 1 is fixedly installed with a wiring cable body 2.

[0024] The interface reinforcement mechanism 3 includes a fixing ring 30 and a fixing seat 31. The middle part of the fixing ring 30 is fixedly sleeved with the outer surface of the end of the heating cable body 1. The middle part of the fixing seat 31 is fixedly sleeved with the outer surface of the top of the wiring cable body 2. Several fixing blocks 32 are fixedly installed on the outer surface of the fixing seat 31. Each end of the fixing block 32 is hinged with a connecting block 33. The top of each of the two connecting blocks 33 is fixedly installed with an arc-shaped side plate 34. There are six arc-shaped side plates 34. The six arc-shaped side plates 34 are arranged around the center of the fixing seat 31. Two arc-shaped plates 35 are fixedly installed on the side of the arc-shaped side plate 34 near the wiring cable body 2. The two arc-shaped plates 35 are respectively attached to the upper and lower surfaces of the fixing ring 30. The outer surface of the top of the six arc-shaped side plates 34 is threadedly connected with a threaded sleeve 36.

[0025] By setting a fixing block 32 and a connecting block 33, protrusions for auxiliary positioning are provided on the surfaces of both the fixing block 32 and the connecting block 33, so as to avoid the connecting block 33 connected to the arc-shaped side plate 34 from expanding too much and becoming loose after rotating along the fixing block 32, which would make it inconvenient to close.

[0026] By setting the threaded sleeve 36, after adjusting the arc-shaped plates 35 installed on the surface of the arc-shaped side plate 34 to fit against the outer surface of the heating cable body 1, the six arc-shaped side plates 34 form a ring tube outside the heating cable body 1. Therefore, after threading the pre-passed threaded sleeve 36 onto the outside of the arc-shaped side plate 34, the arc-shaped side plate 34 can be fixed by the sleeve, and the connection limit of the interface is maintained under the position limit formed by the arc-shaped plate 35 and the fixing ring 30.

[0027] The working process of this utility model is as follows:

[0028] For the middle area of ​​the heating cable body 1 located inside the oil extraction pipe 4, in order to reduce or eliminate the "whiplash effect", hexagonal collars 5 and other structures can be installed at appropriate positions on its outer surface for limiting. Specifically, when the heating cable body 1 is wired and no longer needs to be stretched, the control motor 7 is started, and the gear 8 fixedly sleeved at its output end will rotate in the inner cavity of the outer shell 6, driving the two racks 9 meshing on its outer edge to slide along the inner surfaces of the top and bottom of the outer shell 6 respectively. The support blocks 10 connected to the far ends of the two racks 9 will move away from each other until they abut and fit against the inner wall of the oil extraction pipe 4.

[0029] After the end of the heating cable body 1 is inserted into the wiring cable body 2 for connection, the connection can be further limited by the interface reinforcement mechanism 3. The specific operation is as follows: first, the threaded sleeve 36 is passed through the end of the heating cable body 1, and then the heating cable body 1 is inserted into the wiring cable body 2. Next, the six arc-shaped side plates 34 are rolled upwards so that the arc-shaped plate 35 installed in the inner layer abuts against the outer surface of the heating cable body 1 and cooperates with the fixing ring 30 to form a snap-fit ​​effect. Finally, the threaded sleeve 36 is screwed on the outside of the arc-shaped side plate 34 for fixed limitation.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A downhole heating cable directional well installation protector for oil and gas wells, comprising a heating cable body (1), a sucker rod (4), characterized in that, The outer surface of the middle part of the heating cable body (1) is fixedly sleeved with a hexagonal collar (5), the middle part of the side surface of the hexagonal collar (5) is fixedly installed with an outer shell (6), the inner surface of the outer shell (6) is fixedly installed with a motor (7), the output end of the motor (7) is fixedly sleeved with a gear (8), the gear (8) is rotatably installed in the inner cavity of the outer shell (6), the outer edge of the gear (8) is engaged with two racks (9), the outer surfaces of the two racks (9) are slidably installed with the inner surface of the outer shell (6), and the two racks (9) are diagonally symmetrically arranged about the center of the gear (8), the ends of the two racks (9) away from each other are fixedly installed with support blocks (10), and the side edges of the support blocks (10) are in close contact with the inner wall of the oil extraction pipe (4).

2. The downhole heating cable directional well installation protector of claim 1, wherein, The outer shell (6) is provided with three, and the three outer shells (6) are installed on the three surfaces of the hexagonal collar (5) at intervals, and the three outer shells (6) are arranged around the center of the hexagonal collar (5).

3. The downhole heating cable directional well installation protector of claim 1, wherein, The outer surface of the end of the heating cable body (1) is sleeved with an interface reinforcing mechanism (3), and the inner surface of the end of the interface reinforcing mechanism (3) away from the heating cable body (1) is fixedly installed with a wiring cable body (2).

4. The downhole heating cable directional well installation protector of claim 3, wherein, The interface reinforcing mechanism (3) comprises a fixed ring (30) and a fixed seat (31), the middle part of the fixed ring (30) is fixedly sleeved with the outer surface of the end of the heating cable body (1), and the middle part of the fixed seat (31) is fixedly sleeved with the outer surface of the top end of the wiring cable body (2). The outer surface of the fixed seat (31) is fixedly installed with a plurality of fixed blocks (32), the ends of the fixed blocks (32) are all hingedly connected with connecting blocks (33), the top ends of the two connecting blocks (33) are fixedly installed with arc-shaped side plates (34), the arc-shaped side plates (34) are provided with six, the arc-shaped side plates (34) are arranged around the center of the fixed seat (31), the side of the arc-shaped side plate (34) close to the wiring cable body (2) is fixedly installed with two arc-shaped plates (35), the two arc-shaped plates (35) are respectively in close contact with the upper and lower surfaces of the fixed ring (30), and the outer surfaces of the top ends of the six arc-shaped side plates (34) are threadedly connected with threaded sleeves (36).

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