Disclosure of Invention
The invention aims to solve the defects that in the prior art, when a coiled tubing for oil extraction is heated, a large number of uniformly distributed electric heating assemblies are adopted, so that the heating cost of the coiled tubing is high and the installation and the use are inconvenient.
In order to solve the problems existing in the prior art, the invention adopts the following technical scheme:
The utility model provides an oil recovery is with coiled tubing heating element in pit, including the coiled tubing body, and the steam injection pipe that sets up side by side with the coiled tubing body, the terminal of coiled tubing body is all inserted and is established in the interior lower floor space of underground oil reservoir, the terminal of steam injection pipe is inserted and is established in the interior upper floor space of underground oil reservoir, the external high temperature steam supply device of upper end of steam injection pipe, install the first hose body rather than setting up side by side on the outer end wall of coiled tubing body, and first hose body and coiled tubing body firmly connect, the end-to-end connection of first hose body has the second hose body, and the column gasbag is installed to the end of second hose body, the column gasbag erects the suspension in the underground oil reservoir on the crude oil liquid level, first hose body and the interior first passageway of having seted up jointly of second hose body, and the end of first passageway extends to the outside of column gasbag, and be in the underground oil reservoir on the crude oil liquid level, the end fixed mounting of first passageway has the electrically controlled valve.
Preferably, a plurality of equidistance magnetic conduction plates are orderly arranged at the tail end of the continuous oil pipe body, electromagnets which are arranged in one-to-one correspondence with the plurality of magnetic conduction plates are orderly arranged on the second hose body, and the electromagnets are magnetically attracted with the corresponding magnetic conduction plates after being electrified.
Preferably, a clamping groove matched with the outer side of the continuous oil pipe body in size is formed in one side, close to the continuous oil pipe body, of the first hose body, a plurality of clamping rings distributed at equal intervals are clamped at the tail end of the continuous oil pipe body in an orderly mode, and a plurality of magnetic conduction plates are fixed on the clamping rings in a one-to-one correspondence mode.
Preferably, an electrical heating tube is mounted at the end of the second flexible pipe body.
Preferably, the first hose body and the second hose body are internally provided with a second channel together, and the second channel is communicated with the inside of the columnar air bag.
Preferably, the electric heating pipe and the columnar air bag are arranged side by side, an L-shaped air bag is fixedly connected between the tail end of the columnar air bag and the end head of the electric heating pipe, the L-shaped air bag is communicated with the second channel, and a stable L-shaped structure is formed after the L-shaped air bag is inflated and expanded.
Preferably, the elastic sheet is fixedly arranged in the L-shaped air bag, and the elastic sheet is in a U-shaped structure under the condition of no external force.
Preferably, the electromagnetic valve is arranged at the communication position of the columnar air bag and the second channel, and the electromagnetic valve is also arranged at the communication position of the second channel and the L-shaped air bag.
Preferably, a third channel is jointly arranged in the first hose body and the second hose body, the third channel and the first channel are arranged side by side, the tail end of the third channel points to the electric heating tube, the steam flowing direction in the third channel is opposite to the steam flowing direction in the first channel, and the tail end of the third channel is fixedly provided with the electric control valve.
Preferably, the upper ends of the first channel and the third channel are connected with a connecting piece, the connecting piece comprises a carrier, a first through pipe is arranged inside one end of the carrier, the first through pipe is externally connected with a high-temperature steam supply device, a second through pipe communicated with the upper end of the third channel is arranged at the other end of the carrier, a cavity connected between the first through pipe and the second through pipe is arranged in the carrier, a nozzle communicated with the first through pipe is fixedly arranged in the cavity, the nozzle points to the second through pipe, a third through pipe communicated with the inner end wall of the cavity is arranged in the carrier, and the third through pipe is communicated with the upper end of the first channel.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the first inseparable hose body is connected to the outer side of the continuous oil pipe body side by side, the second inseparable hose body is connected to the tail end of the first hose body, the tail end of the second hose body is floated upwards by means of the columnar air bags, so that after the device is lowered to an underground oil layer, the tail ends of the first channels arranged in the first hose body and the second hose body can float upwards to the upper part of the crude oil liquid level in the underground oil layer, and a large amount of high-pressure high-temperature steam is injected into the underground oil layer during SAGD oil extraction, so that the high-temperature steam can be conveyed upwards through the first channels and is consistent with the upward conveying path of crude oil through the continuous oil pipe body, the continuous oil pipe body is heated by means of the high-temperature steam from bottom to top, a large amount of uniformly distributed electric heating components are not required, the installation and the use are convenient, and the heating cost during continuous oil extraction can be effectively reduced;
2. According to the invention, the plurality of evenly-distributed magnetic conductive plates are orderly arranged at the tail end of the continuous oil pipe body, and electromagnets corresponding to the plurality of magnetic conductive plates one by one are orderly arranged on the second hose body, and the connection control of the second hose body and the tail end of the continuous oil pipe body can be realized by virtue of the magnetic attraction between the electromagnets and the corresponding magnetic conductive plates after the electromagnets are electrified and started, so that the flexible control of the separation and connection of the second hose body and the tail end of the continuous oil pipe body can be realized, and the convenient stability of the device during the down-hole or recovery along an oil production well can be improved to a certain extent;
3. According to the invention, the clamping groove is formed in the first hose body, the first hose body and the continuous oil pipe body can be firmly connected by means of the clamping groove and the continuous oil pipe body, meanwhile, the clamping rings which are fixed in one-to-one correspondence with the plurality of magnetic guide plates are clamped at the tail end of the continuous oil pipe body, so that the flexibility and convenience of the device in disassembly and assembly can be effectively improved, the clamping groove is supported by the supporting and expanding piece, the device can be synchronously assembled and used in the process of placing the continuous oil pipe body underground along an oil extraction well, and the use flexibility of the device is improved to a certain extent;
4. According to the invention, the electric heating pipe is arranged at the tail end of the second hose body, so that the high-temperature steam filled in the underground oil layer can be secondarily heated, the high-temperature stability of the steam is ensured, meanwhile, the L-shaped air bag is connected between the electric heating pipe and the end head of the columnar air bag, and the elastic reset of the elastic sheet fixed in the L-shaped air bag is matched, so that a worker can control the posture of the electric heating pipe in the underground oil layer through inflation and deflation, the flattened electric heating pipe is horizontally positioned on the crude oil liquid level, the contact area of the electric heating pipe and the steam can be effectively improved, the effect of the electric heating pipe on the secondary heating of the steam is facilitated to be improved, the electric heating pipe is positioned between the columnar air bag and the continuous oil pipe body after being accommodated, the electric heating pipe can be protected, and the safety of the device during the lowering and recovery is ensured;
5. According to the invention, the third channels which are arranged side by side with the first channels are arranged in the first hose body and the second hose body, high-temperature steam is conveyed into the third channels from top to bottom, and the high-temperature steam in the first channels is matched with the high-temperature steam conveying from bottom to top, so that the uniform stability of the continuous oil pipe body heated by the steam can be effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic illustration of the invention in operation;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a perspective view of the invention in operation;
FIG. 4 is a front cross-sectional view of the structure of FIG. 3 in accordance with the present invention;
FIG. 5 is a perspective view of the second flexible pipe body and the end of the coiled tubing body in isolation during operation of the present invention;
FIG. 6 is a perspective view of the present invention with the retainer used to open and engage the clip trench brace to the outside of the coiled tubing body;
FIG. 7 is a split view of the coiled tubing body, clamping groove and spreader of the present invention;
FIG. 8 is a front cross-sectional view of the structure of FIG. 6 in accordance with the present invention;
FIG. 9 is a perspective view of the present invention when placed vertically;
FIG. 10 is a perspective view of the present invention bent to a horizontal position after being placed vertically down into a subterranean reservoir;
FIG. 11 is a perspective view of the second flexible pipe body and the end of the coiled tubing body of the present invention shown in an unseparated condition;
fig. 12 is a front cross-sectional view of the present invention at the L-shaped balloon of fig. 11.
Number in the figure:
1. A coiled tubing body 101, a steam injection tube;
2. A first hose body, 201, a second hose body, 202, a columnar balloon, 203, a first channel;
3. 301, electromagnet;
4. clamping groove 401, clamping ring;
5. An electric heating tube;
6. The second channel, 601, L-shaped air bag, 602, shrapnel;
7. a third channel;
8. Connecting piece 801, carrier 802, first through pipe 803, second through pipe 804, cavity 805, nozzle 806, third through pipe;
9. The device comprises a spreader 901, a ring frame 902, a first supporting block 903, a second supporting block 904, a groove 905 and a spray hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The embodiment provides an underground coiled tubing heating assembly for oil recovery, referring to fig. 1-12, specifically, the underground coiled tubing heating assembly comprises a coiled tubing body 1 and a steam injection pipe 101 arranged side by side with the coiled tubing body 1, wherein the tail ends of the coiled tubing body 1 are inserted into a lower space in an underground oil layer, the tail ends of the steam injection pipe 101 are inserted into an upper space in the underground oil layer, the upper end of the steam injection pipe 101 is externally connected with a high-temperature steam supply device, a first hose body 2 arranged side by side with the high-temperature steam supply device is arranged on the outer end wall of the coiled tubing body 1, the first hose body 2 is firmly connected with the coiled tubing body 1, the tail end of the first hose body 2 is connected with a second hose body 201, the tail end of the second hose body 201 is provided with a columnar air bag 202, the columnar air bag 202 is vertically suspended on the liquid level in the underground oil layer, a first channel 203 is jointly arranged in the first hose body 2 and the second hose body 201, the tail ends of the first channel 203 extend to the outer side of the columnar air bag 202 and are positioned on the liquid level in the underground oil layer, and an electric control valve is fixedly arranged at the tail ends of the first channel 203.
When the SAGD technology is used for exploiting the underground oil layer, a worker can use the device to heat steam for the continuous oil pipe body 1, so that the temperature of crude oil conveyed in the continuous oil pipe body 1 is guaranteed, stability and high efficiency in crude oil conveying are guaranteed, in the oil extraction process, the continuous oil pipe body 1 and the first hose body 2 externally connected with the continuous oil pipe body are placed into the lower space of the underground oil layer through the oil extraction well, then under the self buoyancy of the columnar air bag 202, float on the liquid level of the underground oil layer crude oil, the columnar air bag 202 is used for suspending on the liquid level of the crude oil to drive, the tail end of the first channel 203 is exposed at the position above the liquid level of the underground oil layer, the tail end of the first channel 203 is arranged at the tail end of the first channel 203 in a closed state in the descending process through the electric control valve, sand and the crude oil in the descending installation process of the device can be prevented from entering the first channel 203, the first channel 203 is prevented from being blocked in the installation process, when the first channel 203 rises to the liquid level of the underground oil layer due to the buoyancy of the columnar air bag 202, the tail end of the first channel 203 is arranged in the first channel 203 is guaranteed to be communicated with the electric control valve 203.
The steam injection pipe 101 is then put into the upper space of the underground oil layer through the steam injection well, in the operation process, the high-temperature steam supply device connected with the upper end of the steam injection pipe 101 is started, high-temperature and high-pressure steam is continuously filled into the underground oil layer through the steam injection pipe 101, the high-temperature steam enters the underground oil layer to heat the crude oil in the underground oil layer, and the high-pressure steam is injected, so that the crude oil in the underground oil layer enters through the bottom end of the continuous oil pipe body 1 and is conveyed upwards along the continuous oil pipe body 1, along with the injection of the high-temperature steam, part of the high-temperature steam enters through the port of the first channel 203 exposed above the crude oil level of the underground oil layer and then moves upwards along the first channel 203 synchronously with the crude oil, the high-temperature steam moves upwards from below in the first channel 203, continuous heating of the crude oil conveyed upwards in the continuous oil pipe body 1 is realized, the flow direction of the high-temperature steam is consistent with the upward conveying direction of the crude oil in the continuous oil pipe body 1, the stable steam heating body can be provided for conveying the crude oil in the continuous oil pipe body 1 more effectively and directly, and the continuous oil 1 is conveyed, and the stability of the continuous oil pipe is ensured.
In the implementation process, as shown in fig. 5, 9 and 11, a plurality of magnetic conductive plates 3 distributed at equal intervals are sequentially installed at the tail end of the coiled tubing body 1, electromagnets 301 which are arranged in one-to-one correspondence with the plurality of magnetic conductive plates 3 are sequentially installed on the second hose body 201, and the electromagnets 301 are magnetically attracted with the corresponding magnetic conductive plates 3 after being electrified, when the device is used, in the process of lowering and installing the device, the electromagnets 301 can be stably supported by power supply, the electromagnets 301 which are arranged at equal intervals are cut off by the aid of the magnetic attraction of the corresponding magnetic conductive plates 3 after the electromagnets 301 are electrified and started, so that the second hose body 201 and the tail end of the coiled tubing body 1 are kept in a stable parallel connection state, in this mode, the convenient stability of the coiled tubing body 1, the first hose body 2 and the second hose body 201 in the ground can be effectively improved along the oil production well, when the tail ends of the coiled tubing body 1 and the second hose body 201 are lowered to the space of the ground, the electromagnets 301 are cut off from the tail ends of the oil layer 1 and the tail ends of the second hose body 201, the electromagnets 301 arranged at equal intervals are cut off, the electromagnets 301 are cut off from the tail ends of the power supply and the tail ends of the oil layer 1 and the crude oil layer 201, the electromagnets which are arranged at the tail ends of the coiled tubing body and the second hose body 201 are suspended in the ground, the magnetic body is suspended in the cylindrical bottom space, and the cylindrical bottom end 201 is lifted up by the magnetic air bag 201 is stably, and the tail ends of the device is lifted up by the magnetic device is suspended in the magnetic device, and the bottom end of the bottom hose body is suspended in the bottom end of the hose body is suspended in the hose bottom space, and the bottom is suspended in the bottom space, and has the bottom is suspended in the bottom is suspended.
In the running process of the device, the tail end of the second hose body 201 is vertically arranged on the crude oil liquid level of the underground oil layer, the tail end of the second hose body 201 is influenced by the elastic performance of the second hose body 201, the main body part of the second hose body 201 is in a bent structure, when the device needs to be recovered, the plurality of orderly arranged electromagnets 301 are controlled to be electrified and started one by one only according to the direction opposite to the power-off direction, the structure in fig. 1 is taken as an example, as the second hose body 201 is separated and then is in a bent shape, the distance between the corresponding electromagnets 301 and the magnetic conduction plate 3 is gradually increased from left to right, the distance between the leftmost electromagnet 301 and the magnetic conduction plate 3 is closest, after the leftmost electromagnet 301 is electrified and started, the magnetic attraction between the leftmost electromagnet 301 and the corresponding magnetic conduction plate 3 is utilized, so that the plurality of electromagnets 301 are gradually electrified from left to right to generate the magnetic attraction of the corresponding magnetic conduction plate 3, the second hose body 201 is gradually pulled close to the tail end of the continuous oil pipe body 1, and finally the second hose body 201 is gradually pulled to the tail end of the continuous oil pipe body 1, and the device can be effectively and conveniently and stably recovered from the oil well after the device is effectively and recovered.
In the specific implementation process, as shown in fig. 2-4 and fig. 6-8, a clamping groove 4 matched with the outer side size of the continuous oil pipe body 1 is formed on one side of the first hose body 2 close to the continuous oil pipe body 1, a plurality of clamping rings 401 distributed at equal intervals are clamped at the tail end of the continuous oil pipe body 1 in an orderly manner, a plurality of magnetic conduction plates 3 are fixed on the plurality of clamping rings 401 in a one-to-one correspondence manner, when the device is used, through arranging the clamping groove 4 matched with the outer side size of the continuous oil pipe body 1 on the first hose body 2, by means of the clamping groove 4 and the continuous oil pipe body 1, the flexible pipe body has the advantages that the operation convenience of dismounting connection between the first flexible pipe body 2 and the continuous oil pipe body 1 can be effectively improved, meanwhile, the clamping rings 401 corresponding to the magnetic conduction plates 3 one to one are clamped at the tail end of the continuous oil pipe body 1, the clamping rings 401 are clamped with the continuous oil pipe body 1, the operation convenience of dismounting connection between the magnetic conduction plates 3 and the continuous oil pipe body 1 can be effectively improved, and the flexibility and convenience of assembling and using of the device can be effectively improved under the mutual cooperation.
When the first hose body 2 is firmly connected to the outside of the coiled tubing body 1 through the clamping groove 4, the expanding piece 9 is needed to be used, the expanding piece 9 comprises a ring frame 901 movably sleeved on the outside of the coiled tubing body 1, a first supporting block 902 is fixedly arranged on the right side of the upper end of the ring frame 901, a second supporting block 903 is fixedly arranged on the left side of the lower end of the ring frame 901, one side of the second supporting block 903 close to the first supporting block 902 is provided with a groove 904 with the size matched with the outside of the coiled tubing body 1, the front surface and the rear surface of the first supporting block 902 and the front surface and the rear surface of the second supporting block 903 are both flat surfaces, the C-shaped curved surface in the clamping groove 4 can be expanded into a U-shaped curved surface by virtue of the support of the first supporting block 902 and the second supporting block 903, the clamping groove 4 is convenient to be clamped on the outside of the coiled tubing body 1 in the continuous conveying process of the coiled tubing body 1 and the first hose body 2, the first support block 902 and the second support block 903 are arranged in hollow structures and are connected with an external air pump, evenly distributed spray holes 905 are formed on the first support block 902, the second support block 903 and the groove 904, air is supplied to the hollow structures in the first support block 902 and the second support block 903 through the air pump, air flow is finally sprayed out through the spray holes 905 formed on the first support block 902, the second support block 903 and the groove 904, an air flow layer is formed between the inner end wall of the clamping groove 4 and the first support block 902 and the second support block 903 and between the continuous oil pipe body 1 and the groove 904, friction resistance between the first support block 902, the second support block 903 and the inner end wall of the clamping groove 4 and friction resistance between the groove 904 and the continuous oil pipe body 1 can be effectively reduced through air flow, and the continuous expansion of the clamping groove 4 by means of the expanding piece 9 is facilitated for lifting staff, the efficiency and convenience of firmly connecting the first flexible pipe body 2 to the coiled tubing body 1.
In the specific implementation process, as shown in fig. 1, the electric heating tube 5 is installed at the tail end of the second hose body 201, when the device is used, the electric heating tube 5 installed at the tail end of the second hose body 201 is electrified and started, steam filled in an upper space in the underground oil layer can be subjected to secondary heating after the electric heating tube 5 is electrified and started, the temperature of the steam conveyed upwards through the first channel 203 can be effectively improved through secondary heating, and the stability of the device for conveying the steam in the underground oil layer from bottom to top through the first channel 203 and heating the continuous oil pipe body 1 from bottom to top is further improved.
In the specific implementation process, as shown in fig. 3-5 and fig. 10-12, a second channel 6 is jointly formed in the first hose body 2 and the second hose body 201, the second channel 6 is communicated with the inside of the columnar air bag 202, the electric heating tube 5 is arranged side by side with the columnar air bag 202, an L-shaped air bag 601 is fixedly connected between the tail end of the columnar air bag 202 and the end head of the electric heating tube 5, the L-shaped air bag 601 is communicated with the second channel 6, a stable L-shaped structure is formed after the L-shaped air bag 601 is inflated, an elastic sheet 602 is fixedly installed in the L-shaped air bag 601, the elastic sheet 602 is in a U-shaped structure under the condition of no external force, an electromagnetic valve is installed at the communicating position of the columnar air bag 202 and the second channel 6, and the electromagnetic valve is also installed at the communicating position of the second channel 6 and the L-shaped air bag 601.
When the device is used, in the process of lowering the second hose body 201 to the underground oil layer, the columnar air bag 202 is not inflated, and is in a contracted state, the whole volume of the columnar air bag 202 in the state is small, the device is convenient to pass smoothly in an oil production well, when the tail end of the second hose body 201 is lowered to a preset position, a worker can inflate the columnar air bag 202 through the second channel 6, so that the columnar air bag 202 is inflated and inflated, the buoyancy of the columnar air bag 202 is greatly improved after inflation, the device is convenient to carry the tail end of the second hose body 201 to the crude oil level in the underground oil layer by virtue of the upward buoyancy provided by the columnar air bag 202, then the worker closes the electromagnetic valve between the second channel 6 and the columnar air bag 202, the stability of inflation in the columnar airbag 202 is ensured, and the electromagnetic valve between the second channel 6 and the L-shaped airbag 601 is opened, at the moment, the air flow in the second channel 6 is filled into the L-shaped airbag 601, so that the L-shaped airbag 601 is inflated, the elastic deformation force of the elastic sheet 602 is overcome after the L-shaped airbag 601 is inflated, the L-shaped airbag is unfolded to form a stable L-shaped structure, the electric heating tube 5 swings to be in a state vertical to the columnar airbag 202 by virtue of the connection of the L-shaped airbag 601, the electric heating tube 5 is finally arranged on the crude oil liquid level of the underground oil layer in a horizontal state, the contact area of the electric heating tube 5 and steam in the upper space in the underground oil layer can be effectively improved, and the secondary heating effect of the electric heating tube 5 on the steam is facilitated.
When the device is ready to be recovered, the staff controls the L-shaped air bag 601 to be communicated with the second channel 6, the L-shaped air bag 601 is subjected to air suction operation through the second channel 6, after the air in the L-shaped air bag 601 is sucked away, the electric heating tube 5 is reversely turned over under the elastic reset of the elastic sheet 602, the state of being attached to the columnar air bag 202 side by side is reapplied, then the staff controls the columnar air bag 202 to be communicated with the second channel 6, the air suction operation is performed on the columnar air bag 202 through the second channel 6, the columnar air bag 202 is sucked and contracted, the buoyancy provided by the contracted columnar air bag is greatly reduced, the staff can conveniently and gradually electrify by means of a plurality of electromagnets 301, the second hose 201 is attached to the tail end of the continuous oil tube body 1 again, the operation is orderly stable, the convenience of the device in installation and recovery is improved to a certain extent, when the device is not deployed, the electric heating tube 5 is stored between the continuous oil tube body 1 and the columnar air bag 202, the electric heating tube 5 can be protected to a certain extent, the accidental collision damage to the device in the installation and recovery process is avoided, and the service life of the electric heating tube 5 is prolonged.
In a specific implementation process, as shown in fig. 1-3 and fig. 5, a third channel 7 is commonly provided in the first hose body 2 and the second hose body 201, the third channel 7 is arranged side by side with the first channel 203, the tail end of the third channel 7 points to the electrothermal tube 5, the steam flowing direction in the third channel 7 is opposite to the steam flowing direction in the first channel 203, an electric control valve is fixedly installed at the tail end of the third channel 7, the upper ends of the first channel 203 and the third channel 7 are connected with a connecting piece 8, the connecting piece 8 comprises a carrier 801, a first through pipe 802 is provided in one end of the carrier 801, the first through pipe 802 is externally connected with a high-temperature steam supply device, a second through pipe 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 connected between the first through pipe 802 and the second through pipe 803 is provided in the carrier 801, a nozzle 805 is fixedly installed in the cavity 804 and is directed to the second through pipe, a third through 806 communicated with the inner end wall of the cavity 804 is provided in the carrier 801, and the upper end 803 is communicated with the upper end 803 of the third through pipe 803.
When the device is used, in the steam conveying process, along with the consumption of heat energy, the longer the conveying distance is, the lower the temperature of steam is, the worse the heating effect on the coiled tubing body 1 is, so that when the coiled tubing body 1 is heated by high-temperature steam conveyed upwards in the first channel 203, the temperature in the coiled tubing body 1 gradually decreases from bottom to top, therefore, when the high-temperature steam is conveyed upwards from bottom to top through the first channel 203, the high-temperature steam is conveyed downwards through the third channel 7, the coiled tubing body 1 gradually decreases downwards under the influence of the high-temperature steam heating in the third channel 7, and the coiled tubing body 1 is continuously and stably heated by the steam through the neutralization of the first channel 203 and the third channel 7, so that the smooth stability of the crude oil flowing in the coiled tubing body 1 in the oil extraction process is further improved.
When the first channel 203 and the third channel 7 are used for heating steam of the coiled tubing body 1 in a matching manner, the steam in the first channel 203 flows from bottom to top, and under the transmission of an external high-temperature steam supply device, the high-temperature steam enters the connecting piece 8 through the first through pipe 802, directly enters the second through pipe 803 through the nozzle 805 and then enters the third channel 7, the steam is conveyed from top to bottom in the third channel 7, and in the process of injecting the steam into the second through pipe 803 through the nozzle 805, a low-pressure area can be formed in the cavity 804 under the Bernoulli effect due to the high-speed flow of the high-temperature steam, so that an external negative pressure suction effect is formed, finally, the steam in the first channel 203 enters the cavity 804 through the third through pipe 806, the steam which moves upwards in the first channel 203 enters the second through the cavity 803, then flows downwards again from the third channel 7, and finally the low-temperature steam is sprayed to the electric heating tube 5 through the tail end of the third channel 7 to be heated again, so that the cyclic utilization of the steam is realized, and the cyclic utilization of the energy of the steam is facilitated.
Specifically, the working principle and the operation method of the invention are as follows:
When the SAGD technology is used for exploiting crude oil in an underground oil layer, a large amount of high-temperature and high-pressure steam is conveyed into an upper space in the underground oil layer through the steam injection pipe 101, crude oil in the bottom oil layer is heated, the crude oil is extruded through the continuous oil pipe body 1 by means of continuous filling of the steam, conveying of the crude oil from bottom to top is realized by means of the continuous oil pipe body 1, the high-temperature steam introduced into the upper space in the small part of the underground oil layer is conveyed from bottom to top through the first channel 203, the steam heating operation of the continuous oil pipe body 1 from bottom to top is realized by following the synchronous movement of the exploitation of the crude oil, the synchronous high-temperature steam can move from top to bottom through the third channel 7, the steam heating operation of the continuous oil pipe body 1 from top to bottom is realized, and the continuous stability of the continuous oil pipe body 1 heated by the steam can be effectively improved under the two-phase cooperation.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.