A downhole heating cable protection device for oil and gas wells

Abstract

The utility model relates to heating cable protection technical field, concretely is an oil gas well down heating cable protection device, including the protection sleeve ring, the protection sleeve ring is equipped in the outside of cable, the inside detachable connection of protection sleeve ring has the sealing ring, the one side fixed connection of protection sleeve ring has two connecting blocks, the other side of protection sleeve ring is equipped with two connecting slots, the connecting block is inserted in the inside of connecting slot, the inner wall one side of connecting slot is equipped with the slot, the inside joint of slot has the clamping block, the clamping block sliding connection in the inside of protection sleeve ring is crossed connecting block, through the welding of two cables is equipped with the protection sleeve, make the protection sleeve ring not only can the location of cable, still can greatly reduce the influence of external vibration to the welding point, and then not only make the use security of cable will not reduce, still can conveniently maintain the cable, make the use economy is higher.

Description

Technical Field

[0001] This utility model relates to the field of heating cable protection technology, and more specifically, to a downhole heating cable protection device for oil and gas wells. Background Technology

[0002] In oil extraction, especially in heavy oil thermal recovery wells, electric heating is used to assist production in order to ensure normal production. This production method requires the use of hollow rod electric heating technology, which involves sending electric heating cables through hollow rods and hollow sucker rods into the well. The operating current is adjusted by a ground control device to control the heating temperature, reduce crude oil viscosity, and ensure normal production of the oil well.

[0003] A search revealed a prior art patent for a protection device for an electric heating cable in a heavy oil well, patent publication number CN211296065U. The specification states that it employs a closed protection system, using upper and lower working cylinders combined to enclose and protect the electric heating cable. This effectively protects the live and neutral wires of the wellbore electric heating cable, preventing damage due to the slow descent of the wellbore rod in heavy oil, and avoiding fatigue damage caused by bending and folding during long-term up-and-down reciprocating motion. This ensures the cable remains undamaged and the pumping unit operates safely.

[0004] However, in actual use, when the well depth exceeds the length of a single cable (such as more than 2,000 meters), multiple cables need to be welded together to form a complete circuit. After long-term use, the underground cable will be vibrated, causing the micro-cracks in the weld to expand, which may lead to leakage or short circuit, and thus affect the use of the cable. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a protection device for downhole heating cables in oil and gas wells, so as to solve the problem that after long-term use, the downhole cable will be subjected to vibration, causing the micro-cracks in the weld to expand, thereby causing leakage or short circuit, which will affect the use of the cable.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a protection device for downhole heating cables in oil and gas wells, including a protective sleeve, which is sleeved on the outside of the cable. A sealing ring is detachably connected to the inner side of the protective sleeve. Two connecting blocks are fixedly connected to one side of the protective sleeve. Two connecting grooves are opened on the other side of the protective sleeve. The connecting blocks are inserted into the inside of the connecting grooves. A slot is opened on one side of the inner wall of the connecting groove. A locking block is locked inside the slot. The locking block slides through the connecting block and is connected to the inside of the protective sleeve.

[0007] The inner wall of the connecting groove has an installation groove on the other side. The side of the card block away from the card groove is fixedly connected to an installation piece. The end of the installation piece away from the card block is fixedly connected to a pull rope. An elastic element is sleeved on the outside of the pull rope.

[0008] The protective collar has multiple limiting grooves inside, and a limiting block is slidably connected inside the limiting groove. The limiting block is fixedly connected to the outside of the sealing ring. Multiple slots are provided on the inner wall of the limiting groove. Multiple insert rods are fixedly connected to the end of the limiting block away from the sealing ring. A sealing block is fixedly connected to the outside of the insert rod.

[0009] The card block is slidably connected inside the mounting groove, the mounting plate is slidably connected inside the mounting groove, and the pull rope is slidably connected inside the mounting groove.

[0010] The end of the pull rope away from the mounting plate is fixedly connected to a rotating rod, which is rotatably connected inside the protective collar.

[0011] One end of the elastic element is fixedly connected to the inner wall of the mounting groove, and the other end of the elastic element is fixedly connected to the mounting plate.

[0012] The insertion rod is inserted into the inside of the slot, and the sealing block fits into the inside of the slot at the corresponding position.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In the above solution, by installing a protective sleeve at the weld joint of the two cables, the protective sleeve can not only limit the cable position, but also greatly reduce the impact of external vibration on the weld joint. This not only ensures that the safety of the cable is not reduced, but also facilitates the maintenance of the cable, resulting in high economic efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is the right view of the present invention;

[0017] Figure 3 For the present utility model Figure 2 Cross-sectional view of the structure at point AA;

[0018] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0019] Figure 5 For the present utility model Figure 2 Cross-sectional view of the structure at point BB;

[0020] Figure 6 For the present utility model Figure 5 Enlarged view of the structure at point B in the middle.

[0021] [Figure Labels]

[0022] 1. Protective collar; 2. Sealing ring; 3. Connecting block; 4. Connecting groove; 5. Slot; 6. Slot; 7. Mounting slot; 8. Mounting piece; 9. Pull rope; 10. Elastic element; 11. Rotating rod; 12. Limiting groove; 13. Limiting block; 14. Slot; 15. Insert rod; 16. Sealing block. Detailed Implementation

[0023] 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.

[0024] Example 1: Please refer to Figures 1 to 6 This utility model provides a technical solution: a protection device for downhole heating cables in oil and gas wells, including a protective collar 1. The protective collar 1 is fitted over the outside of the cable to protect the weld joint of the cable. A sealing ring 2 is detachably connected to the inner side of the protective collar 1. The sealing ring 2 is used to seal the weld joint of the cable to reduce the influence of the external environment on the weld joint. Two connecting blocks 3 are fixedly connected to one side of the protective collar 1. Two connecting grooves 4 are opened on the other side of the protective collar 1. The connecting blocks 3 are inserted into the inside of the connecting grooves 4, so that the connecting grooves 4 are limited. A slot 5 is opened on one side of the inner wall of the connecting groove 4. A locking block 6 is locked inside the slot 5. The locking block 6 slides through the connecting block 3 and is connected to the inside of the protective collar 1, so that both ends of the protective collar 1 are limited.

[0025] When cable protection is required, the protective collar 1 is fitted onto the cable weld joint, and the two locking blocks 6 are moved to the same side, allowing the locking blocks 6 to disengage from the inside of the locking groove 5 and slide into the inside of the protective collar 1. This brings the two ends of the protective collar 1 together, allowing the sealing ring 2 to fit tightly against the cable. At this time, the connecting block 3 slides into the inside of the connecting groove 4, and then the two locking blocks 6 are moved to the opposite side, allowing the locking blocks 6 to penetrate the connecting block 3 and engage with the inside of the locking groove 5. This limits the position of the protective collar 1, and allows the protective collar 1 to push the sealing ring 2 to limit and seal the cable connection. This not only limits the cable but also greatly reduces the impact of external vibration on the weld joint. This ensures that the cable's safety is not reduced and facilitates cable maintenance, resulting in high economic efficiency.

[0026] Example 2: Based on Example 1, in order to facilitate the pulling of the locking block 6, an installation groove 7 is provided on the other side of the inner wall of the connecting groove 4. The locking block 6 is slidably connected to the inside of the installation groove 7. The installation groove 7 provides moving space for the locking block 6. An installation piece 8 is fixedly connected to the side of the locking block 6 away from the locking groove 5. The installation piece 8 is slidably connected to the inside of the installation groove 7. The installation groove 7 limits the installation piece 8, allowing it to slide smoothly. A pull rope 9 is fixedly connected to the end of the installation piece 8 away from the locking block 6. The pull rope 9 is slidably connected to the inside of the installation groove 7. The installation groove 7 limits the pull rope 9, allowing it to slide smoothly. A rotating rod 11 is fixedly connected to the end of the pull rope 9 away from the installation piece 8. The rotating rod 11 is rotatably connected to the inside of the protective collar 1. The protective collar 1 limits the rotating rod 11, allowing it to rotate stably. An elastic element 10 is sleeved on the outside of the pull rope 9. One end of the elastic element 10 is fixedly connected to the inner wall of the installation groove 7, and the other end of the elastic element 10 is fixedly connected to the installation piece 8.

[0027] When the locking block 6 needs to be pulled, the rotating rod 11 is rotated so that one end of the pull rope 9 is wound around it, and the other end of the pull rope 9 pulls the mounting plate 8 to compress the elastic element 10 and deform it, thus driving the locking block 6 into the interior of the mounting groove 7. Conversely, by releasing the rotating rod 11, the elastic element 10 is reset, which in turn pushes the mounting plate 8 to move outward, and the mounting plate 8 pushes the locking block 6 through the connecting block 3 and engages with the interior of the locking groove 5.

[0028] Example 3: Based on Example 2, in order to facilitate the replacement of the sealing ring 2, the protective sleeve 1 has multiple limiting grooves 12 inside. The limiting grooves 12 are slidably connected to the limiting blocks 13 inside, and the limiting grooves 12 limit the limiting blocks 13, so that the limiting blocks 13 can slide smoothly. The limiting blocks 13 are fixedly connected to the outside of the sealing ring 2, so that the sealing ring 2 can be limited to the inside of the protective sleeve 1. The inner wall of the limiting grooves 12 has multiple slots 14. The end of the limiting block 13 away from the sealing ring 2 is fixedly connected to multiple insert rods 15. The insert rods 15 are inserted into the inside of the slots 14, so that the limiting block 13 can be limited more stably. The outside of the insert rods 15 is fixedly connected to a sealing block 16. The sealing block 16 fits into the inside of the corresponding slot 14, so that the insert rods 15 are inserted more stably.

[0029] When the sealing ring 2 needs to be replaced, by pulling the sealing ring 2 inward, the sealing ring 2 can drive the limiting block 13 and the insert rod 15 to move inward, thereby allowing the limiting block 13 to disengage from the inside of the limiting groove 12, and allowing the insert rod 15 to drive the sealing block 16 to slide inside the slot 14, causing the slot 14 to be compressed and deformed, and then disengaging from the inside of the slot 14, thus making the sealing ring 2 easy to disassemble. Conversely, by attaching the sealing ring 2 to the inside of the protective sleeve 1, the limiting block 13 can slide into the inside of the limiting groove 12 and push the insert rod 15 inward, thereby allowing the insert rod 15 to push the sealing block 16 into the inside of the slot 14, causing the sealing block 16 to be compressed and deformed. When the limiting block 13 is attached to the inner wall of the limiting groove 12, the insert rod 15 and the sealing block 16 can perform a reset movement, thereby allowing the sealing block 16 to fill the inside of the slot 14, thus making the engagement between the insert rod 15 and the slot 14 more stable.

[0030] The working process of this utility model is as follows:

[0031] When cable protection is required, the sealing ring 2 is fitted inside the protective sleeve 1, allowing the limiting block 13 to slide into the limiting groove 12 and push the insertion rod 15 inward. This pushes the sealing block 16 into the slot 14, causing the sealing block 16 to be compressed and deformed. When the limiting block 13 is in contact with the inner wall of the limiting groove 12, the insertion rod 15 and the sealing block 16 can perform a reset movement, allowing the sealing block 16 to fill the interior of the slot 14. This makes the engagement between the insertion rod 15 and the slot 14 more stable. Then, by rotating the rotating rod 11, one end of the pull rope 9 is wound around it, allowing the other end of the pull rope 9 to be pulled for installation. The plate 8 compresses the elastic element 10, causing it to deform and drive the locking block 6 into the mounting groove 7. This causes the protective collar 1 to be fitted onto the cable's weld joint, with both ends of the protective collar 1 fitting together, allowing the sealing ring 2 to be tightly fitted with the cable. At this point, by releasing the rotating rod 11, the elastic element 10 is reset, pushing the mounting plate 8 outwards. This causes the mounting plate 8 to push the locking block 6 through the connecting block 3 and engage with the inside of the locking groove 5. This not only limits the cable's movement but also significantly reduces the impact of external vibrations on the weld joint. Consequently, the cable's safety is not compromised, and cable maintenance is convenient, resulting in high economic efficiency.

[0032] 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.

[0033] 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.

[0034] 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 protection device for downhole heating cables in oil and gas wells, characterized in that, The cable includes a protective collar (1), which is fitted over the outside of the cable. A sealing ring (2) is detachably connected to the inside of the protective collar (1). Two connecting blocks (3) are fixedly connected to one side of the protective collar (1). Two connecting grooves (4) are opened on the other side of the protective collar (1). The connecting blocks (3) are inserted into the inside of the connecting grooves (4). A slot (5) is opened on one side of the inner wall of the connecting groove (4). A locking block (6) is locked inside the slot (5). The locking block (6) slides through the connecting block (3) and is connected to the inside of the protective collar (1).

2. The downhole heating cable protection device for oil and gas wells according to claim 1, characterized in that, An installation groove (7) is provided on the other side of the inner wall of the connecting groove (4). An installation piece (8) is fixedly connected to the side of the locking block (6) away from the locking groove (5). A pull rope (9) is fixedly connected to the end of the installation piece (8) away from the locking block (6). An elastic element (10) is sleeved on the outside of the pull rope (9).

3. The downhole heating cable protection device for oil and gas wells according to claim 2, characterized in that, The protective collar (1) has multiple limiting grooves (12) inside. A limiting block (13) is slidably connected inside the limiting groove (12). The limiting block (13) is fixedly connected to the outside of the sealing ring (2). Multiple slots (14) are provided on the inner wall of the limiting groove (12). Multiple insert rods (15) are fixedly connected to the end of the limiting block (13) away from the sealing ring (2). A sealing block (16) is fixedly connected to the outside of the insert rod (15).

4. The protection device for downhole heating cables in oil and gas wells according to claim 2, characterized in that, The card block (6) is slidably connected inside the mounting groove (7), the mounting piece (8) is slidably connected inside the mounting groove (7), and the pull rope (9) is slidably connected inside the mounting groove (7).

5. The downhole heating cable protection device for oil and gas wells according to claim 2, characterized in that, The end of the pull rope (9) away from the mounting plate (8) is fixedly connected to a rotating rod (11), which is rotatably connected inside the protective collar (1).

6. The downhole heating cable protection device for oil and gas wells according to claim 2, characterized in that, One end of the elastic element (10) is fixedly connected to the inner wall of the mounting groove (7), and the other end of the elastic element (10) is fixedly connected to the mounting plate (8).

7. The downhole heating cable protection device for oil and gas wells according to claim 3, characterized in that, The insert (15) is inserted into the inside of the slot (14), and the sealing block (16) fits against the inside of the corresponding slot (14).

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