Novel ground oil pipe heating device

Abstract

The utility model relates to the technical field of oil extraction equipment, in particular to a novel ground oil pipe heating device which comprises a sleeve arranged on the outer side of an oil pipe in a sleeved mode, heating coils are arranged between the sleeve and the oil pipe and arranged in the axial direction of the oil pipe, and a fixing groove for containing a cable is formed in the inner side wall of the sleeve. Compared with the prior art, according to the technical scheme, protection of the interior of the heating coil is achieved, corrosion of factors such as external rainwater and illumination to the heating coil is avoided, aging and abrasion of the heating coil are slowed down, meanwhile, the heating coil is not a traditional electric heating wire, and the heating coil is not prone to damage. Instead, heating is achieved through a magnetic field in high-frequency current, direct contact with the oil pipe is avoided, aging abrasion of the heating coil is further relieved, and the heating efficiency of the heating coil is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to a novel well oil pipe heating device. Background Art

[0002] Petroleum is a fluid mineral buried deep underground. At present, in the actual exploitation process of oil wells in special oil and gas reservoirs such as heavy oil, high-viscosity oil and condensate gas, the sucker rods are often stuck or broken due to thick oil, wax deposition and excessive load, which seriously affects the output and recovery rate. Heating the oil pipe can improve the fluidity of crude oil and increase production.

[0003] Oil pipes are divided into above-the-hole oil pipes and downhole oil pipes. The heating of above-the-hole oil pipes is mainly to wrap electric heating wires around the oil pipes, and indirectly heat the crude oil in the oil pipes by heating the oil pipes. Although this electromagnetic induction heating method can heat the oil, the protection measures outside the heating wires are not perfect. External factors such as rain and light will corrode the heating wires, causing the heating wires to age after a period of use, affecting the heating efficiency.

[0004] Therefore, it is necessary to propose a new type of wellbore oil pipe heating device to strengthen the protection of the heating wire and ensure the heating efficiency of the heating wire. Utility Model Content

[0005] The utility model aims to solve the problem that the existing electric heating wire lacks corresponding protection measures when heating oil pipes, resulting in easy aging of the electric heating wire, thereby affecting the heating efficiency. A new type of well oil pipe heating device is now provided.

[0006] The technical solution of the utility model is:

[0007] A novel well oil pipe heating device comprises a sleeve sleeved on the outside of the oil pipe, a heating coil is arranged between the sleeve and the oil pipe, the heating coil is arranged along the axial direction of the oil pipe, a fixing groove for accommodating a cable is arranged on the inner side wall of the sleeve, and the fixing groove extends from the middle of the oil pipe to both ends of the oil pipe along the axial direction of the oil pipe;

[0008] Grooves are arranged at both ends of the sleeve, buckles are arranged in the grooves, and when the buckles are locked, the two ends of the sleeve can be deformed and then fixed to the coupling of the oil pipe.

[0009] Furthermore, both ends of the sleeve are inwardly contracted cylindrical shapes, and when both ends of the sleeve are deformed, the diameters of both ends of the sleeve are smaller than the diameter of the oil pipe coupling.

[0010] Furthermore, a fixing frame is fixedly connected to the inner wall of the sleeve, and a fixing hole is provided in the middle of the fixing frame to prevent the heating coil from being placed.

[0011] Furthermore, threaded holes are provided around the fixing hole, and threaded holes are also provided around the heating coil. Screws are arranged in the threaded holes, and the heating coil is fixed to the fixing hole through the screws and the threaded holes.

[0012] Furthermore, the fixing groove is welded to the sleeve.

[0013] The utility model discloses a novel wellbore oil pipe heating device, wherein the sleeve can wrap the heating coil inside, thereby preventing the heating coil from being corroded by external factors such as rain and light, and preventing the premature aging and wear of the heating coil. Through the axial arrangement of the heating coil, the oil in the oil pipe can be heated step by step. The fixing groove is used to place and fix the cable, and the cable is used to energize the heating coil. The fixing groove can prevent the cable from shaking, thereby preventing interference with the operation of the heating coil. The grooves at both ends of the sleeve can further fix the sleeve and the oil pipe. The buckles on the grooves can lock the sleeve, so that the two ends of the sleeve can fit with the oil pipe and be fixed at the coupling of the oil pipe, thereby fixing the sleeve and the oil pipe. Compared with the traditional technology, the technical scheme realizes the protection of the heating coil, avoids the erosion of the heating coil by external factors such as rain and light, and slows down the aging and wear of the heating coil. Meanwhile, the heating coil is not a traditional electric heating wire, but uses the magnetic field in the high-frequency current to achieve heating, thereby avoiding direct contact with the oil pipe, further slowing down the aging and wear of the heating coil, and ensuring the heating efficiency of the heating coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is the front view of the oil pipe and sleeve combination of the utility model;

[0016] Figure 3 For this utility model Figure 2 Sectional view at AA;

[0017] Figure 4 This is a three-dimensional diagram of the heating coil of the utility model;

[0018] Figure 5 This is a three-dimensional diagram of the fixing frame of the utility model;

[0019] Figure 6 This is a three-dimensional diagram of the combination of the fixing frame and the heating coil of the utility model.

[0020] Figure numerals: 1, sleeve; 2, heating coil; 3, fixing groove; 4, groove; 5, oil pipe; 6, fixing frame; 7, fixing hole; 8, threaded hole. DETAILED DESCRIPTION

[0021] In order to make the technical means, technical features, utility model objectives and technical effects achieved by the utility model easy to understand, the utility model is further explained below with reference to specific illustrations.

[0022] Embodiment 1:

[0023] like Figure 2 and Figure 3 As shown, this embodiment provides a new type of well oil pipe heating device, including a sleeve 1 sleeved on the outside of the oil pipe 5, a heating coil 2 is provided between the sleeve 1 and the oil pipe 5, and the heating coil 2 is arranged along the axial direction of the oil pipe 5. A fixing groove 3 for accommodating a cable is provided on the inner wall of the sleeve 1, and the fixing groove 3 extends from the middle of the oil pipe 5 to both ends of the oil pipe 5 along the axial direction of the oil pipe 5. Grooves 4 are provided at both ends of the sleeve 1, and buckles are provided in the grooves 4. When the buckles are locked, the two ends of the sleeve 1 can be deformed and then fixed to the couplings of the oil pipe 5.

[0024] Preferably, Figure 1 As shown, the two ends of the sleeve 1 are inwardly contracted cylindrical. When the two ends of the sleeve 1 are deformed, the diameters of the two ends of the sleeve 1 are smaller than the diameter of the coupling of the oil pipe 5. This design of the two ends of the sleeve 1 can facilitate the fixing of the sleeve 1 on the oil pipe 5 to prevent axial movement on the oil pipe 5.

[0025] Preferably, Figure 5 and Figure 4 As shown, the inner wall of the sleeve 1 is screwed to a fixing frame 6, and a fixing hole 7 is provided in the middle of the fixing frame 6 to prevent the heating coil 2 from being placed.

[0026] Preferably, Figure 6 As shown, threaded holes 8 are provided around the fixing hole 7, and threaded holes 8 are also provided around the heating coil 2. Screws are arranged in the threaded holes 8, and the heating coil 2 is fixed to the fixing hole 7 by means of the screws and the threaded holes 8. Since the heating coil 2 has an oil pipe 5 inside its circle, the heating coil 2 cannot shake during the heating process, and the screws and the threaded holes 8 can fix the heating coil 2 in the fixing hole 7.

[0027] Preferably, the fixing groove 3 is welded to the sleeve 1 .

[0028] During operation, the sleeve 1 can wrap the heating coil 2 inside, which can prevent the heating coil 2 from being eroded by external factors such as rain and sunlight, and avoid premature aging and wear of the heating coil 2. Through the axial arrangement of the heating coil 2, it can ensure that the oil in the oil pipe 5 is heated step by step. The fixing groove 3 is used to place and fix the cable, and the cable is used to energize the heating coil. The side wall of the sleeve 1 has a hole, and the cable passes through the sleeve 1 and enters the fixing groove 3. The fixing groove 3 can prevent the cable from shaking and avoid interfering with the operation of the heating coil 2. The grooves 4 at both ends of the sleeve 1 can achieve further fixation of the sleeve 1 and the oil pipe 5. The buckle on the groove 4 can lock the sleeve 1, so that the two ends of the sleeve 1 can fit with the oil pipe 5 and be fixed at the coupling with the oil pipe 5, so as to fix the sleeve 1 and the oil pipe 5. The technical scheme realizes the protection of the heating coil 2, avoids the erosion of the heating coil 2 by external factors such as rain and light, and slows down the aging and wear of the heating coil 2. At the same time, the heating coil 2 is not a traditional electric heating wire, but uses the magnetic field in the high-frequency current to achieve heating, avoids direct contact with the oil pipe 5, further slows down the aging and wear of the heating coil 2, and ensures the heating efficiency of the heating coil 2.

[0029] The above description is only a preferred embodiment of the utility model, and is not intended to limit the scope of implementation of the utility model. That is, all equivalent changes and modifications made according to the content of the patent application scope of the utility model should belong to the technical scope of the utility model.

Claims

1. A novel oil pipe heating device for a well, comprising a sleeve (1) sleeved on the outside of an oil pipe (5), characterized in that: A heating coil (2) is provided between the sleeve (1) and the oil pipe (5), and the heating coil (2) is arranged along the axial direction of the oil pipe (5). A fixing groove (3) for accommodating a cable is provided on the inner side wall of the sleeve (1), and the fixing groove (3) extends from the middle of the oil pipe (5) to both ends of the oil pipe (5) along the axial direction of the oil pipe (5); Grooves (4) are provided at both ends of the sleeve (1), and buckles are provided in the grooves (4). When the buckles are locked, the two ends of the sleeve (1) can be deformed and thus fixed to the coupling of the oil pipe (5).

2. A novel well oil pipe heating device according to claim 1, characterized in that: The two ends of the sleeve (1) are inwardly contracted cylindrical shapes. When the two ends of the sleeve (1) are deformed, the diameters of the two ends of the sleeve (1) are smaller than the diameter of the oil pipe (5) coupling.

3. The novel wellbore oil pipe heating device according to claim 1 is characterized in that: A fixing frame (6) is fixedly connected to the inner wall of the sleeve (1), and a fixing hole (7) is provided in the middle of the fixing frame (6) to prevent the heating coil (2) from being placed.

4. A novel well oil pipe heating device according to claim 3, characterized in that: The fixing hole (7) is provided with threaded holes (8) around it, and the heating coil (2) is also provided with threaded holes (8) around it. Screws are inserted into the threaded holes (8), and the heating coil (2) is fixed to the fixing hole (7) by means of the screws and the threaded holes (8).

5. The novel wellbore oil pipe heating device according to claim 1 is characterized in that: The fixing groove (3) is welded to the sleeve (1).

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