Coiled tubing heating assembly

Abstract

The invention discloses a coiled tubing heating assembly, and relates to the technical field of tubing heating, according to the coiled tubing heating assembly, an inseparable first hose body is connected to the outer side of a coiled tubing body side by side, a separable second hose body is connected to the tail end of the first hose body, and the tail end of the second hose body floats upwards by means of a columnar air bag; after the device is placed at a designated position, the tail end of the first channel can float to the position above the liquid level, high-pressure and high-temperature steam injection is matched, high-temperature steam can be conveyed from bottom to top through the first channel, and the path is consistent with the upward conveying path of liquid through the coiled tubing body; the continuous oil pipe body is heated from bottom to top by means of high-temperature steam, a large number of evenly-distributed electric heating assemblies do not need to be used, installation and use are convenient and fast, and the heating cost of the continuous oil pipe can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas production equipment, and in particular to a coiled tubing heating assembly. Background Art

[0002] In the post-processing of oil and gas production, coiled tubing is one of the necessary equipment. It has been widely used in oil transportation or storage. When transporting heavy oil or high-viscosity oil products, heating the coiled tubing is particularly important in order to reduce the viscosity of the oil products and improve their fluidity so as to facilitate smooth transportation of the oil products.

[0003] In the prior art, heating components used in coiled tubing generally adopt an electric heating mode. The electric heating components are arranged on the coiled tubing and, when powered on, heat the oil transported in the coiled tubing. To ensure that the entire tubing and the oil flow path in the well are effectively heated, the electric heating components are usually evenly distributed. If the oil storage device is large or long-distance transportation is required, the use of electric heating components will be huge, which will significantly increase the purchase, installation, and subsequent operation and maintenance costs of the heating equipment.

[0004] Therefore, a coiled tubing heating assembly is proposed to solve some of the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art in which a large number of uniformly distributed electric heating components are used when heating the coiled tubing, resulting in high coiled tubing heating costs and inconvenience in installation and use. A coiled tubing heating component is proposed.

[0006] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A continuous oil tubing heating assembly comprises a continuous oil tubing body and a steam injection pipe arranged side by side with the continuous oil tubing body, the ends of the continuous oil tubing body are inserted in the lower space within the oil layer, the ends of the steam injection pipe are inserted in the upper space within the oil layer, the upper end of the steam injection pipe is externally connected to a high-temperature steam supply device, a first hose body arranged side by side is installed on the outer end wall of the continuous oil tubing body, and the first hose body is firmly connected to the continuous oil tubing body, the end of the first hose body is connected to a second hose body, and a columnar airbag is installed at the end of the second hose body, the columnar airbag is upright and suspended on the liquid surface of the oil layer, a first channel is commonly opened in the first hose body and the second hose body, and the end of the first channel extends to the outside of the columnar airbag and is on the liquid surface of the oil layer, and an electric control valve is fixedly installed at the end of the first channel.

[0008] Preferably, a plurality of equally spaced magnetic conductive plates are orderly installed at the end of the coiled tubing body, and electromagnets corresponding to the plurality of magnetic conductive plates are orderly installed on the second hose body, and the electromagnets are magnetically attracted to the corresponding magnetic conductive plates when energized.

[0009] Preferably, a slot matching the outer size of the coiled tubing body is provided on one side of the first hose body close to the coiled tubing body, and a plurality of equally spaced clamping rings are sequentially engaged at the end of the coiled tubing body, and a plurality of magnetic conductive plates are fixed on the plurality of clamping rings one by one.

[0010] Preferably, an electric heating pipe is installed at the end of the second flexible tube body.

[0011] Preferably, the first flexible tube body and the second flexible tube body are both provided with a second channel, and the second channel is communicated with the interior of the cylindrical airbag.

[0012] Preferably, the electric heating tube and the columnar airbag are arranged side by side, an L-shaped airbag is fixedly connected between the end of the columnar airbag and the end of the electric heating tube, and the L-shaped airbag is connected to the second channel. After the L-shaped airbag is inflated, a stable L-shaped structure is formed.

[0013] Preferably, a spring piece is fixedly installed in the L-shaped airbag, and the spring piece presents a U-shaped structure when not subjected to external force.

[0014] Preferably, a solenoid valve is installed at the connection point between the cylindrical airbag and the second channel, and a solenoid valve is also installed at the connection point between the second channel and the L-shaped airbag.

[0015] Preferably, a third channel is provided in both the first hose body and the second hose body, and the third channel is arranged side by side with the first channel, the end of the third channel points to the electric heating tube, the steam flow direction in the third channel is opposite to the steam flow direction in the first channel, and an electric control valve is also fixedly installed at the end of the third channel.

[0016] Preferably, the upper ends of the first channel and the third channel are connected with a connecting piece, and the connecting piece includes a carrier, a first through-tube is opened inside one end of the carrier, and the first through-tube is externally connected to a high-temperature steam supply device, and a second through-tube connected to the upper end of the third channel is opened at the other end of the carrier, a cavity connected between the first through-tube and the second through-tube is opened in the carrier, and a nozzle connected to the first through-tube is fixedly installed in the cavity, and the nozzle points to the second through-tube, and a third through-tube connected to the inner end wall of the cavity is opened in the carrier, and the third through-tube is connected to the upper end of the first channel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, an inseparable first flexible pipe body is connected side by side to the outside of a coiled tubing body, and a detachable second flexible pipe body is connected to the end of the first flexible pipe body. A cylindrical airbag is used to float the end of the second flexible pipe body. This allows the ends of the first passages provided in the first and second flexible pipe bodies to float above the liquid level of the oil reservoir after the device is placed in the oil reservoir. This allows the high-temperature steam to be transported upward from the bottom of the reservoir through the first passage in conjunction with the SAGD operation of injecting a large amount of high-pressure, high-temperature steam into the oil reservoir, consistent with the upward transport path of the liquid through the coiled tubing body. The high-temperature steam heats the coiled tubing body from the bottom of the reservoir upward, eliminating the need for a large number of evenly distributed electric heating components. Furthermore, the device is easy to install and use, effectively reducing the cost of heating the coiled tubing.

[0019] 2. In the present invention, a plurality of evenly distributed magnetic conductive plates are sequentially mounted on the end of the coiled tubing body, and electromagnets corresponding to the plurality of magnetic conductive plates are sequentially mounted on the second flexible tube body. By energizing the electromagnets and magnetically attracting the corresponding magnetic conductive plates, the connection between the second flexible tube body and the end of the coiled tubing body can be controlled. Flexible control over the separation and connection between the second flexible tube body and the end of the coiled tubing body is achieved, thereby improving the convenience and stability of the coiled tubing to a certain extent.

[0020] 3. In the present invention, by providing a clamping groove on the first hose body and engaging the clamping groove with the coiled tubing body, a secure connection between the first hose body and the coiled tubing body can be achieved. Furthermore, by engaging a clamping ring fixed to the end of the coiled tubing body in a one-to-one correspondence with the plurality of magnetic conductive plates, the device can be effectively made more flexible and convenient during assembly and disassembly. The clamping groove is then expanded by the expansion member, thereby enhancing the device's usability to a certain extent.

[0021] 4. In the present invention, by installing the electric heating tube at the end of the second flexible tube body, the high-temperature steam filled in the oil layer can be heated secondary, ensuring the high-temperature stability of the steam. At the same time, by connecting the L-shaped airbag between the electric heating tube and the end of the cylindrical airbag, and coordinating the elastic reset of the spring piece fixed in the L-shaped airbag, the staff can control the posture of the electric heating tube in the oil layer by charging and deflating the airbag. When the electric heating tube is flattened and horizontally located on the oil liquid surface, the contact area between the electric heating tube and the steam can be effectively increased, which is conducive to improving the effect of the electric heating tube on the secondary heating of the steam. When the electric heating tube is stored, it is located between the cylindrical airbag and the coiled tubing body, which can protect the electric heating tube and ensure the safety of the device during lowering and recovery.

[0022] 5. In the present invention, by providing a third channel arranged side by side with the first channel within the first and second flexible hose bodies, and transporting high-temperature steam from top to bottom into the third channel, combined with the high-temperature steam transport from bottom to top in the first channel, the uniformity and stability of steam heating of the coiled tubing body can be effectively improved. At the same time, by connecting a connector to the upper ends of the first and third channels, the steam transported upward in the first channel can be circulated through the third channel and ultimately reheated by the electric heating pipe and the large amount of high-temperature and high-pressure steam in the oil layer, thereby realizing the recycling of steam and facilitating the conservation and recycling of steam energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a schematic diagram of the present invention when it is in operation;

[0025] Figure 2 For the present invention Figure 1 Cross-sectional view at AA in the middle;

[0026] Figure 3 A perspective view of the present invention when in operation;

[0027] Figure 4 For the present invention Figure 3 Front cross-section of the middle structure;

[0028] Figure 5 This is a perspective view of the second flexible pipe body and the end of the coiled tubing body being separated when the present invention is in operation;

[0029] Figure 6 This is a three-dimensional diagram of the present invention when the expansion member is used to expand the slot and engage it on the outside of the coiled tubing body;

[0030] Figure 7 This is an exploded view of the coiled tubing body, the clamping groove, and the support member of the present invention;

[0031] Figure 8 For the present invention Figure 6 Front cross-section of the middle structure;

[0032] Figure 9 It is a three-dimensional diagram of the present invention when it is placed vertically downward;

[0033] Figure 10 This is a stereoscopic diagram of the present invention being lowered vertically into the oil layer and then bent to a horizontal state;

[0034] Figure 11This is a perspective view of the second flexible hose and the end of the coiled tubing body of the present invention when they are not separated;

[0035] Figure 12 For the present invention Figure 11 Front cross-sectional view of the middle L-shaped airbag.

[0036] Serial number in the picture:

[0037] 1. Coiled tubing body; 101. Steam injection pipe;

[0038] 2. First flexible tube body; 201. Second flexible tube body; 202. Cylindrical airbag; 203. First channel;

[0039] 3. Magnetic plate; 301. Electromagnet;

[0040] 4. Card slot; 401. Snap ring;

[0041] 5. Electric heating tube;

[0042] 6. Second channel; 601. L-shaped airbag; 602. Shrapnel;

[0043] 7. Third channel;

[0044] 8. Connector; 801. Carrier; 802. First through-tube; 803. Second through-tube; 804. Cavity; 805. Nozzle; 806. Third through-tube;

[0045] 9. Supporting member; 901. Ring frame; 902. First supporting block; 903. Second supporting block; 904. Groove; 905. Spray hole. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Example: This example provides a coiled tubing heating assembly, see Figure 1 - Figure 12Specifically, it includes a continuous oil tubing body 1 and a steam injection pipe 101 arranged side by side with the continuous oil tubing body 1. The ends of the continuous oil tubing body 1 are inserted into the lower layer of the oil layer, the end of the steam injection pipe 101 is inserted into the upper layer of the oil layer, and the upper end of the steam injection pipe 101 is externally connected to a high-temperature steam supply device. A first hose body 2 arranged side by side is installed on the outer end wall of the continuous oil tubing body 1, and the first hose body 2 is firmly connected to the continuous oil tubing body 1. The end of the first hose body 2 is connected to the second hose body 201, and the end of the second hose body 201 is installed with a cylindrical airbag 202, which is upright and suspended on the liquid surface of the oil layer. A first channel 203 is commonly opened in the first hose body 2 and the second hose body 201, and the end of the first channel 203 extends to the outside of the cylindrical airbag 202 and is on the oil liquid surface in the oil layer. An electric control valve is fixedly installed at the end of the first channel 203.

[0048] Workers can use this device to steam heat the coiled tubing body 1 to ensure the temperature of the oil transported in the coiled tubing body 1, thereby ensuring stable and efficient oil transportation by the coiled tubing body 1. The coiled tubing body 1 and the first flexible hose body 2 connected to it are placed in the lower layer of the oil layer. Then, the cylindrical airbag 202 floats on the liquid surface of the oil layer under its own buoyancy. With the help of the cylindrical airbag 202 suspended on the oil surface, the end of the first channel 203 is exposed above the liquid surface of the oil layer. By installing an electric control valve at the end of the first channel 203, the end of the first channel 203 is kept in a closed state during the lowering process, which can prevent sand, gravel or oil from entering the first channel 203 during the lowering and installation of the device, and prevent the first channel 203 from being blocked during the installation process. When the first channel 203 rises above the liquid surface in the oil layer due to the buoyancy of the cylindrical airbag 202, the electric control valve installed at the end of the first channel 203 opens to ensure the connectivity of the first channel 203.

[0049] The steam injection pipe 101 is placed in the upper layer of the oil reservoir. During operation, the high-temperature steam supply device connected to the upper end of the steam injection pipe 101 is activated to continuously supply high-temperature, high-pressure steam into the oil reservoir through the steam injection pipe 101. The high-temperature steam enters the oil reservoir and heats the oil reservoir. The injection of high-pressure steam causes oil to enter through the bottom end of the coiled tubing body 1 and be transported upward along the coiled tubing body 1. As the high-temperature steam is injected, some of the high-temperature steam enters through the port of the first channel 203 exposed above the liquid level of the oil reservoir and then moves upward along the first channel 203 in sync with the oil. The high-temperature steam moves from bottom to top within the first channel 203, continuously heating the oil being transported upward within the coiled tubing body 1. The flow direction of the high-temperature steam is consistent with the direction in which the oil is transported upward within the coiled tubing body 1. This can more effectively and directly provide stable steam heating for the oil transported within the coiled tubing body 1, thereby ensuring the stability of the oil transported by the coiled tubing body 1.

[0050] In the specific implementation process, Figure 5 、 Figure 9 and Figure 11 As shown, the end of the coiled tubing body 1 is orderly installed with a plurality of equally spaced magnetic conductive plates 3, and the second flexible tube body 201 is orderly installed with electromagnets 301 corresponding to the plurality of magnetic conductive plates 3. After the electromagnets 301 are energized, they are magnetically attracted to the corresponding magnetic conductive plates 3. When the device is in use, the electromagnets 301 can obtain stable power supply support during the lowering and installation process of the device. With the help of the magnetic attraction between the electromagnets 301 and the corresponding magnetic conductive plates 3 after being energized, the second flexible tube body 201 and the end of the coiled tubing body 1 are kept in a stable side-by-side connection state. In this mode, the staff can effectively improve the connection between the coiled tubing body 1 and the second flexible tube body 201. The first hose body 2 and the second hose body 201 are placed in the oil layer conveniently and stably. After the ends of the coiled tubing body 1 and the second hose body 201 are placed in the lower layer of the oil layer, starting from the ends of the coiled tubing body 1 and the second hose body 201, the power supply to the numerous electromagnets 301 arranged at equal intervals is cut off, and the magnetic attraction with the corresponding magnetic conductive plates 3 is disconnected. The end of the coiled tubing body 1 remains in the lower layer of the oil layer, while the end of the second hose body 201 rises upward with the help of the buoyancy provided by the cylindrical airbag 202. Finally, the cylindrical airbag 202 carries the end of the second hose body 201 to the liquid surface in the oil layer, thereby achieving stable deployment operation of the device.

[0051] During the operation of the device, the end of the second hose body 201 is vertically set on the surface of the oil layer. Due to the elastic properties of the second hose body 201 itself, the main part of the second hose body 201 presents a curved structure. When the device needs to be recovered, it is only necessary to control the numerous orderly arranged electromagnets 301 to be energized one by one in the direction opposite to the power-off direction to start the device. Figure 1Taking the middle structure as an example, since the second flexible tube body 201 is curved after being separated, the distance between the corresponding electromagnets 301 and the magnetic conductive plates 3 gradually increases from left to right, and the distance between the leftmost electromagnet 301 and the magnetic conductive plates 3 is the shortest. When the leftmost electromagnet 301 is energized and started, the second flexible tube body 201 is pulled toward the end of the coiled tubing body 1 by virtue of the magnetic attraction between it and the corresponding magnetic conductive plates 3. The numerous electromagnets 301 are gradually energized from left to right to generate magnetic attraction to the corresponding magnetic conductive plates 3, so that the second flexible tube body 201 is gradually pulled closer to the end of the coiled tubing body 1 from left to right, and finally the second flexible tube body 201 is re-attached and connected to the end of the coiled tubing body 1, which can effectively improve the convenience and stability of the device when it is withdrawn after use.

[0052] In the specific implementation process, Figure 2 - Figure 4 and Figure 6 - Figure 8 As shown, a clamping groove 4 that is adapted to the outer size of the continuous oil tubing body 1 is opened on the side of the first hose body 2 close to the continuous oil tubing body 1, and a plurality of equidistantly distributed clamping rings 401 are orderly clamped at the end of the continuous oil tubing body 1, and a plurality of magnetic conductive plates 3 are fixed on the plurality of clamping rings 401 in a one-to-one correspondence. When the device is used, the clamping groove 4 that is adapted to the outer size of the continuous oil tubing body 1 is provided on the first hose body 2, and the clamping groove 4 and the continuous oil tubing body 1 are clamped, the convenience of operation of disassembling and connecting between the first hose body 2 and the continuous oil tubing body 1 can be effectively improved. At the same time, the clamping ring 401 that corresponds to the plurality of magnetic conductive plates 3 one by one is clamped at the end of the continuous oil tubing body 1, and the clamping ring 401 and the continuous oil tubing body 1 can also effectively improve the convenience of operation of disassembling and connecting between the magnetic conductive plates 3 and the continuous oil tubing body 1. With mutual cooperation, the flexibility and convenience of assembling and using the device can be effectively improved.

[0053] When the first flexible pipe body 2 is firmly connected to the outside of the continuous oil tubing body 1 through the card slot 4, a support piece 9 is also required to be used. The support piece 9 includes a ring frame 901 that is movably sleeved on the outside of the continuous oil tubing body 1, and a first support block 902 is fixedly installed on the right side of the upper end of the ring frame 901, and a second support block 903 is fixedly installed on the left side of the lower end of the ring frame 901, and the second support block 903 is close to the side of the first support block 902. A groove 904 is provided that is adapted to the outer size of the continuous oil tubing body 1. The front and rear surfaces of the first support block 902 and the second support block 903 are both provided as flat surfaces. With the support of the first support block 902 and the second support block 903, the C-shaped curved surface in the card slot 4 can be expanded into a U-shaped curved surface, so that the card slot 4 can be engaged with the outside of the continuous oil tubing body 1 during the continuous transportation of the continuous oil tubing body 1 and the first flexible pipe body 2. The first support block 902, the second support block 903 and the groove 904 are provided with uniformly distributed spray holes 905. The air pump supplies air to the hollow structure inside the first support block 902 and the second support block 903. The airflow is finally ejected through the spray holes 905 provided on the first support block 902, the second support block 903 and the groove 904, forming an airflow layer between the inner end wall of the slot 4 and the first support block 902, the second support block 903, and between the coiled tubing body 1 and the groove 904. The airflow can effectively reduce the friction resistance between the first support block 902, the second support block 903 and the inner end wall of the slot 4, as well as the friction resistance between the groove 904 and the coiled tubing body 1, which is conducive to improving the efficiency and convenience of the staff in continuously opening the slot 4 with the help of the support member 9 to firmly connect the first flexible pipe body 2 to the coiled tubing body 1.

[0054] In the specific implementation process, Figure 1 As shown, an electric heating pipe 5 is installed at the end of the second flexible tube body 201. When the device is in use, the electric heating pipe 5 installed at the end of the second flexible tube body 201 is powered on and started. After the electric heating pipe 5 is powered on and started, it will perform secondary heating on the steam filled in the upper space in the oil layer. The secondary heating can effectively increase the temperature of the steam transported upward through the first channel 203, which is conducive to further improving the stability of the device in transporting the steam in the oil layer from bottom to top through the first channel 203 and heating the coiled tubing body 1 from bottom to top.

[0055] In the specific implementation process, Figure 3 - Figure 5 and Figure 10 - Figure 12As shown, a second channel 6 is provided in both the first hose body 2 and the second hose body 201, and the second channel 6 is communicated with the interior of the cylindrical airbag 202. The electric heating tube 5 and the cylindrical airbag 202 are arranged side by side. An L-shaped airbag 601 is fixedly connected between the end of the cylindrical airbag 202 and the end of the electric heating tube 5, and the L-shaped airbag 601 is communicated with the second channel 6. After the L-shaped airbag 601 is inflated, a stable L-shaped structure is formed. A spring piece 602 is fixedly installed in the L-shaped airbag 601, and the spring piece 602 presents a U-shaped structure when not subjected to external force. An electromagnetic valve is installed at the connection between the cylindrical airbag 202 and the second channel 6, and an electromagnetic valve is also installed at the connection between the second channel 6 and the L-shaped airbag 601.

[0056] When the device is used, in the process of lowering the second flexible pipe body 201 into the oil layer, the cylindrical airbag 202 is not inflated and is in a contracted state. In this state, the overall volume of the cylindrical airbag 202 is small, which facilitates the smooth passage of the device. When the end of the second flexible pipe body 201 is lowered to the predetermined position, the staff can inflate the cylindrical airbag 202 through the second channel 6, so that the cylindrical airbag 202 expands after inflation. The buoyancy of the cylindrical airbag 202 is greatly improved after inflation, which facilitates the device to carry the end of the second flexible pipe body 201 to the liquid surface in the oil layer with the help of the buoyancy provided by the cylindrical airbag 202, and then the staff closes the gap between the second channel 6 and the cylindrical airbag 202. The solenoid valve ensures the stability of inflation in the cylindrical airbag 202, and opens the solenoid valve between the second channel 6 and the L-shaped airbag 601. At this time, the airflow in the second channel 6 is filled into the L-shaped airbag 601, causing the L-shaped airbag 601 to inflate. After inflation, the L-shaped airbag 601 overcomes the elastic deformation force of the shrapnel 602 and unfolds to form a stable L-shaped structure. With the help of the connection of the L-shaped airbag 601, the electric heating tube 5 is swung into a state perpendicular to the cylindrical airbag 202, so that the electric heating tube 5 is finally arranged in a horizontal state on the liquid surface of the oil layer, which can effectively increase the contact area between the electric heating tube 5 and the steam in the upper space in the oil layer, which is beneficial to improving the effect of the electric heating tube 5 on secondary heating of the steam.

[0057] When the device is ready to be recovered, the staff first controls the L-shaped airbag 601 to be connected to the second channel 6, and performs an air extraction operation on the L-shaped airbag 601 through the second channel 6. After the gas in the L-shaped airbag 601 is extracted, the elastic reset of the spring 602 will cause the electric heating tube 5 to flip over in the opposite direction and re-present a state of being aligned with the columnar airbag 202. Then the staff controls the columnar airbag 202 to be connected to the second channel 6, and performs an air extraction operation on the columnar airbag 202 through the second channel 6, so that the columnar airbag 202 is evacuated and contracts. After contraction, the air provided by the columnar airbag 202 is compressed. The buoyancy is greatly reduced, which makes it convenient for workers to reconnect the second flexible tube body 201 to the end of the coiled tubing body 1 by gradually energizing the numerous electromagnets 301. The operation is orderly and stable, which improves the convenience of installing and recovering the device to a certain extent. When the device is not deployed, the electric heating tube 5 is stored between the coiled tubing body 1 and the cylindrical airbag 202, which can provide a certain degree of protection for the electric heating tube 5, preventing the electric heating tube 5 from being damaged by accidental collision during the installation and recovery of the device, and is conducive to extending the service life of the electric heating tube 5.

[0058] In the specific implementation process, Figure 1 - Figure 3 and Figure 5 As shown, a third channel 7 is provided in both the first flexible tube body 2 and the second flexible tube body 201, and the third channel 7 is arranged side by side with the first channel 203. The end of the third channel 7 points to the electric heating tube 5. The steam flow direction in the third channel 7 is opposite to the steam flow direction in the first channel 203. An electric control valve is also fixedly installed at the end of the third channel 7. The upper ends of the first channel 203 and the third channel 7 are connected with a connector 8, and the connector 8 includes a carrier 801. A first through pipe 802 is provided inside one end of the carrier 801, and the first through pipe 802 is connected to an external high-temperature steam supply device, and the other end of the carrier 801 is provided with a second through-tube 803 connected to the upper end of the third channel 7. A cavity 804 connected between the first through-tube 802 and the second through-tube 803 is provided in the carrier 801, and a nozzle 805 connected to the first through-tube 802 is fixedly installed in the cavity 804, and the nozzle 805 points to the second through-tube 803. A third through-tube 806 connected to the inner end wall of the cavity 804 is provided in the carrier 801, and the third through-tube 806 is connected to the upper end of the first channel 203.

[0059] When the device is in use, the steam transport process consumes heat energy, resulting in a longer transport distance and a lower steam temperature, leading to a poorer heating effect on the coiled tubing body 1. This results in the temperature within the coiled tubing body 1 gradually decreasing from bottom to top as the high-temperature steam transported upward through the first channel 203 heats the coiled tubing body 1. Therefore, while high-temperature steam is being transported upward through the first channel 203, it is also being transported downward through the third channel 7. The temperature of the coiled tubing body 1, affected by the high-temperature steam in the third channel 7, gradually decreases from top to bottom. The neutralization between the first channel 203 and the third channel 7 allows the steam heating of the coiled tubing body 1 to be continuous and stable, facilitating smooth and stable flow of oil within the coiled tubing body 1.

[0060] When the first channel 203 and the third channel 7 are used in conjunction to steam-heat the coiled tubing body 1, the steam in the first channel 203 flows upward. Under the supply of high-temperature steam from an external high-temperature steam supply device, the high-temperature steam enters the connector 8 through the first passage 802 and is directly injected into the second passage 803 through the nozzle 805. The steam then enters the third channel 7, where it is transported downward from top to bottom. During the process of the steam being injected into the second passage 803 through the nozzle 805, the high-speed flow of the high-temperature steam creates a low-pressure region within the cavity 804 due to the Bernoulli effect, thereby creating an external negative pressure suction effect. Ultimately, the steam in the first channel 203 enters the cavity 804 through the third passage 806. The steam that has moved upward within the first channel 203 enters the second passage 803 through the cavity 804 and then flows downward again through the third channel 7. Finally, the low-temperature steam is sprayed onto the electric heating tube 5 through the end of the third passage 7 for secondary heating, thereby achieving steam recycling and facilitating energy conservation and recycling.

[0061] Specifically, the working principle and operation method of the present invention are as follows:

[0062] During use, a large amount of high-temperature and high-pressure steam is transported into the upper space of the oil layer through the steam injection pipe 101 to heat the oil layer. With the help of continuous steam injection, the oil product is pressed out through the coiled tubing body 1, and the oil product is transported from bottom to top with the help of the coiled tubing body 1. A small amount of high-temperature steam introduced into the upper space of the oil layer is transported from bottom to top through the first channel 203, moving synchronously with the oil product, and realizing the steam heating operation of the coiled tubing body 1 from bottom to top. Simultaneously, the high-temperature steam can move from top to bottom through the third channel 7, and realize the steam heating operation of the coiled tubing body 1 from top to bottom. The cooperation of these two phases can effectively improve the continuous stability of the steam heating of the coiled tubing body 1.

[0063] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coiled tubing heating assembly, comprising a coiled tubing body (1), and a steam injection pipe (101) arranged side by side with the coiled tubing body (1), wherein the ends of the coiled tubing body (1) are inserted into the lower layer of the oil layer, the ends of the steam injection pipe (101) are inserted into the upper layer of the oil layer, and the upper end of the steam injection pipe (101) is externally connected to a high-temperature steam supply device, characterized in that: A first flexible pipe body (2) arranged side by side is installed on the outer end wall of the continuous tubing body (1), and the first flexible pipe body (2) is firmly connected to the continuous tubing body (1). The end of the first flexible pipe body (2) is connected to the second flexible pipe body (201), and the end of the second flexible pipe body (201) is installed with a columnar airbag (202), and the columnar airbag (202) is vertically suspended on the liquid surface in the oil layer. A first channel (203) is commonly opened in the first flexible pipe body (2) and the second flexible pipe body (201), and the end of the first channel (203) extends to the outside of the columnar airbag (202) and is located on the liquid surface in the oil layer. An electric control valve is fixedly installed at the end of the first channel (203).

2. The coiled tubing heating assembly according to claim 1, characterized in that: The end of the coiled tubing body (1) is provided with a plurality of equally spaced magnetic conductive plates (3) in an orderly manner, and the second flexible tube body (201) is provided with electromagnets (301) arranged in a one-to-one correspondence with the plurality of magnetic conductive plates (3) in an orderly manner, and the electromagnets (301) are magnetically attracted to the corresponding magnetic conductive plates (3) when energized.

3. The coiled tubing heating assembly according to claim 2, characterized in that: A clamping groove (4) adapted to the outer size of the continuous tubing body (1) is provided on one side of the first flexible hose body (2) close to the continuous tubing body (1); a plurality of equidistantly distributed clamping rings (401) are sequentially engaged at the end of the continuous tubing body (1); and a plurality of magnetic conductive plates (3) are fixed on the plurality of clamping rings (401) in a one-to-one correspondence.

4. The coiled tubing heating assembly according to claim 1, characterized in that: An electric heating pipe (5) is installed at the end of the second flexible tube body (201).

5. The coiled tubing heating assembly according to claim 4, characterized in that: A second channel (6) is provided in both the first flexible tube body (2) and the second flexible tube body (201), and the second channel (6) is in communication with the interior of the cylindrical airbag (202).

6. The coiled tubing heating assembly according to claim 5, characterized in that: The electric heating tube (5) and the columnar airbag (202) are arranged side by side, an L-shaped airbag (601) is fixedly connected between the end of the columnar airbag (202) and the end of the electric heating tube (5), and the L-shaped airbag (601) is connected to the second channel (6), and the L-shaped airbag (601) forms a stable L-shaped structure after being inflated.

7. The coiled tubing heating assembly according to claim 6, characterized in that: A spring piece (602) is fixedly installed in the L-shaped airbag (601), and the spring piece (602) presents a U-shaped structure when not subjected to external force.

8. The coiled tubing heating assembly according to claim 7, characterized in that: A solenoid valve is installed at the connection point between the cylindrical airbag (202) and the second channel (6), and a solenoid valve is also installed at the connection point between the second channel (6) and the L-shaped airbag (601).

9. The coiled tubing heating assembly according to claim 1, characterized in that: A third channel (7) is provided in both the first flexible tube body (2) and the second flexible tube body (201), and the third channel (7) and the first channel (203) are arranged side by side. The end of the third channel (7) points toward the electric heating pipe (5), and the steam flow direction in the third channel (7) is opposite to the steam flow direction in the first channel (203). An electric control valve is also fixedly installed at the end of the third channel (7).

10. The coiled tubing heating assembly according to claim 9, characterized in that: The upper ends of the first channel (203) and the third channel (7) are connected with a connecting piece (8), and the connecting piece (8) includes a carrier (801), a first through-tube (802) is provided inside one end of the carrier (801), and the first through-tube (802) is externally connected to a high-temperature steam supply device, and a second through-tube (803) is provided at the other end of the carrier (801) and is communicated with the upper end of the third channel (7), a cavity (804) is provided in the carrier (801) and is connected between the first through-tube (802) and the second through-tube (803), and a nozzle (805) is fixedly installed in the cavity (804) and is communicated with the first through-tube (802), and the nozzle (805) points into the second through-tube (803), and a third through-tube (806) is provided in the carrier (801) and is communicated with the inner end wall of the cavity (804), and the third through-tube (806) is communicated with the upper end of the first channel (203).

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