Layered controllable injection-production pipe column and injection-production process

Abstract

The layered controllable injection and production tubular column comprises a releasing tubular column body, a heat insulation packer, a releasing packer, an injection and production tubular column body and a plug which are sequentially connected in the axial direction, and an oil well pump is arranged on the releasing tubular column body; the injection-production pipe column comprises a plurality of flow control devices distributed in the axial direction and interlayer packers communicated with the adjacent flow control devices, the flow control devices are arranged corresponding to an oil layer, and the interiors of the flow control devices are communicated with the exterior of the pipe column through a plurality of nozzles evenly distributed in the circumferential direction. The hole diameter and the number of the nozzles of the flow control device are set according to the use condition of the corresponding oil layer. According to oil layers with different use conditions, the nozzles with different hole diameters or different numbers are adopted, so that the steam injection amount and the liquid production amount of each oil layer are accurately controlled.

Description

Technical Field

[0001] The present application relates to the technical field of oil production engineering, and in particular, to a layered controllable injection-production string and an injection-production process. Background Art

[0002] When heavy oil development enters the middle and late stages, affected by factors such as reservoir heterogeneity and multiple rounds of throughput, the oil layers have prominent contradictions such as uneven vertical utilization and mutual interference between layers. If a general injection and production technology is used for steam injection and oil production, problems such as uneven distribution of injected steam in each oil layer and interference between layers in the production process will arise, seriously affecting the effect of heavy oil development.

[0003] At present, in order to improve the production of oil layers, the stratified injection and production technology is mainly used to replace the general injection and production technology. The stratified injection and production technology includes stratified steam injection technology and stratified oil production technology. It has the advantages of simple process and low investment, and is widely used in heavy oil development sites.

[0004] Regarding stratified steam injection technology, it is mainly divided into the following two types:

[0005] (1) Use the method of dropping a ball at the wellhead to open the injection valve and inject steam into each oil layer in a quantitative manner;

[0006] (2) According to the physical property data and steam distribution parameters of each sub-layer in the oil layer section, the steam distribution amount is adjusted by adjusting the size of the steam distribution nozzle.

[0007] The former cannot inject steam into each oil layer at the same time, resulting in different shut-in times for each oil layer after steam injection. The oil layer injected with steam first has a longer shut-in time and its heat loss is greater than that of the oil layer injected with steam later. The latter has large differences in the physical property data of each small layer, so there is an error between the actual required steam injection amount and the theoretically designed steam injection amount, resulting in unsatisfactory effect of stratified steam injection.

[0008] The existing stratified oil production technology is difficult to accurately control the liquid production of each oil layer, and the production capacity of the main oil layer cannot be fully utilized. At the same time, the stratified steam injection technology and stratified oil production technology need to be carried out step by step, which leads to complex operation procedures, large heat loss of injected steam, and oil layer pollution, thus affecting the effect of separate injection and production.

[0009] Application Contents

[0010] The embodiments of the present application provide a layered controllable injection and production string and an injection and production process. For oil layers with different production conditions, nozzles with different apertures or different numbers are used to accurately control the steam injection amount and liquid production of each oil layer.

[0011] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0012] According to a first aspect of an embodiment of the present application, a layered controllable injection and production string is provided, comprising a release string, a release packer, an injection and production string and a plug connected in sequence along the axial direction, the release string is provided with an oil pump, the injection and production string comprises a plurality of flow control devices distributed along the axial direction and an interlayer packer connecting adjacent flow control devices, the flow control device is arranged corresponding to the oil layer, the interior of the flow control device and the exterior of the string are connected by a plurality of nozzles evenly distributed circumferentially, and the aperture and number of the nozzles of the flow control device are set according to the production condition of the corresponding oil layer.

[0013] In some embodiments of the present application, based on the aforementioned solution, the release packer includes an anchoring mechanism, a sealing mechanism and a release mechanism, the release mechanism is connected to the release packer, and the release mechanism includes a release pin.

[0014] In some embodiments of the present application, based on the above scheme, the nozzle of the flow control device includes:

[0015] Two large tubes are connected to the first cavity and the second cavity respectively;

[0016] The small tube portion is connected to the two large tube portions, and the inner diameter of the small tube portion is smaller than the inner diameter of the large tube portion.

[0017] In some embodiments of the present application, based on the aforementioned solution, the shape of the nozzle is a Venturi tube shape.

[0018] In some embodiments of the present application, based on the above scheme, the flow control device includes:

[0019] Inner pipe, connected to interlayer packer or drop packer;

[0020] An outer tube is sleeved on the outer side of the inner tube;

[0021] The independently distributed first cavity and second cavity are formed between the inner tube and the outer tube. The first cavity is connected to the inner tube, and the second cavity is connected to the outside of the column and is connected to the first cavity through a plurality of nozzles evenly distributed circumferentially.

[0022] In some embodiments of the present application, based on the above solution, the flow control device further includes:

[0023] The first joint and the second joint are respectively arranged at two ends of the inner tube in the axial direction;

[0024] The annular ring is sleeved on the outer side of the inner tube, the first cavity is formed between the annular ring, the first joint, the inner tube and the outer tube, and the second cavity is formed between the annular ring, the second joint, the inner tube and the outer tube.

[0025] In some embodiments of the present application, based on the aforementioned solution, the first cavity is arranged at an end close to the hands-free packer, and the second cavity is arranged at an end away from the hands-free packer.

[0026] In some embodiments of the present application, based on the above scheme, the nozzle aperture and number of the flow control device are set according to the production conditions of the corresponding oil layer, including:

[0027] Obtaining a preset activation state, and obtaining a preset aperture and a preset number of nozzles according to the preset activation state;

[0028] Measure the production status of the oil layer and obtain the actual production status;

[0029] The preset activation state and the actual activation state are compared, and the preset aperture and / or the preset number of the nozzles are adjusted to obtain the actual aperture and the actual number of the nozzles.

[0030] In some embodiments of the present application, based on the above scheme, the comparison of the preset mobilization state and the actual mobilization state, adjusting the preset aperture and / or preset number of the nozzle, and obtaining the actual aperture and actual number of the nozzle, includes:

[0031] If the actual mobilization condition is better than the preset mobilization condition, the aperture of the nozzle is reduced or the number of the nozzle is reduced based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and number of the nozzle;

[0032] If the actual mobilization condition is the same as the preset mobilization condition, the preset aperture and the preset number of the nozzles remain unchanged, and the actual aperture and the number of the nozzles are obtained;

[0033] If the actual operation condition is worse than the preset operation condition, the aperture of the nozzle is increased or the number of the nozzle is increased based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and the number of the nozzle.

[0034] In some embodiments of the present application, based on the above-mentioned solution, the outer pipe is provided with a plurality of sieve holes communicating with the outside of the pipe string, that is, the annulus of the oil casing.

[0035] In some embodiments of the present application, based on the above scheme, the drop string includes:

[0036] A tubular body, wherein the oil pump is arranged on the tubular body;

[0037] The thermal insulation packer connects the tubing body and the drop packer.

[0038] In some embodiments of the present application, nozzles of different apertures or different numbers are used for oil layers with different production conditions. If the production condition of the oil layer is better, a smaller aperture and / or a smaller number of nozzles are used. Conversely, if the production condition of the oil layer is worse, a larger aperture and / or a larger number of nozzles are used to accurately control the steam injection amount and liquid production amount of each oil layer to achieve the requirements of balanced steam injection and oil production.

[0039] According to a second aspect of an embodiment of the present application, a layered controllable injection-production process is provided, comprising:

[0040] The layered controllable injection and production string of the above embodiment is lowered into the casing, and the position of the flow control device matches the corresponding oil layer;

[0041] The release packer and interlayer packer are pressed, and the sealing mechanism and interlayer packer seal the space between the injection and production pipe string and the casing. The pressure is continued, the release pin is sheared off, the release pipe string is lifted up, and the release pipe string drives the release mechanism to move, the release mechanism and the anchoring mechanism are separated, and the anchoring mechanism, the sealing mechanism, the injection and production pipe string and the plug are left in the casing;

[0042] Steam is injected into the casing through the hand-dropping pipe string, and the steam enters the flow control device;

[0043] Steam enters the space between the injection and production pipe string and the casing through the nozzle, and then enters the corresponding oil layer to complete the steam injection work in the corresponding oil layer;

[0044] After the steam injection is completed, the plunger and sucker rod of the oil pump are lowered into the injection and production tubing string without moving the tubing string, and the oil pump is started to complete the oil production work.

[0045] In some embodiments of the present application, based on the above-mentioned solution, when steam is injected into the casing through the drop string, the speed of the injected steam is controlled so that the steam flow rate in the small tube portion is equal to the speed of sound.

[0046] The beneficial effects of each embodiment of the second aspect mentioned above can refer to the beneficial effects of the first aspect and each embodiment of the first aspect mentioned above, and will not be repeated here.

[0047] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0049] Figure 1 A schematic diagram of a layered controllable injection-production string in an embodiment of the present application is shown;

[0050] Figure 2 A schematic diagram of a flow control device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0052] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0053] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0054] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0055] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0056] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0057] Figure 1 A schematic diagram of a layered controllable injection and production string in an embodiment of the present application is shown. Figure 1 In the figure, 1 is a release string, 2 is a well pump, 3 is a heat insulation packer, 4 is a release mechanism, 5 is an anchoring mechanism, 6 is a sealing mechanism, 7 is a release packer, 8 is a flow control device, 9 is an interlayer packer, 10 is a plug, 11 is an oil layer inlet, 12 is a casing, Figure 2 A schematic diagram of a flow control device in an embodiment of the present application is shown. Figure 2 13 is the first joint, 14 is the large tube part, 15 is the small tube part, 16 is the nozzle, 17 is the second cavity, 18 is the sieve hole, 19 is the second joint, 20 is the inner tube, 21 is the outer tube, 22 is the first cavity, 23 is the liquid inlet, see Figure 1 , a layered controllable injection and production string is provided, the layered controllable injection and production string at least comprises a drop-out string, a drop-out packer, an injection and production string and a plug connected in sequence along the axial direction, and the detailed description is as follows:

[0058] The release pipe string is provided with an oil pump.

[0059] In the present application, the oil pump may be a ball-dropping oil pump.

[0060] The injection and production string includes a plurality of flow control devices distributed along the axial direction and interlayer seals connecting adjacent flow control devices. The flow control devices are arranged corresponding to the oil layers. The inside of the flow control devices and the outside of the string are connected through a plurality of nozzles evenly distributed circumferentially. The aperture and number of the nozzles of the flow control devices are set according to the production conditions of the corresponding oil layers.

[0061] In the present application, each oil layer is injected with steam through a corresponding flow control device, and steam can be injected into each oil layer at the same time. The flow control device can be a tubular structure, and the number of the flow control devices can correspond to the number of oil layers, that is, each oil layer is provided with N flow control devices, N is a positive integer greater than or equal to 1, and the interlayer sealer is used to isolate adjacent flow control devices to prevent the steam in the flow control device from entering the adjacent flow control device, thereby achieving precise steam injection into the oil layer. The nozzles are evenly distributed circumferentially, which facilitates uniform steam injection into the oil layer.

[0062] Specifically, the hands-free packer and the injection and production string may be connected via threads, the injection and production string and the plug may be connected via threads, and the hands-free packer and the interlayer packer may be hydraulically set packers.

[0063] In the present application, the release packer includes an anchoring mechanism, a sealing mechanism and a release mechanism, the release mechanism is connected to the release packer, and the release mechanism includes a release pin.

[0064] In the present application, the nozzle comprises:

[0065] Two large tubes are connected to the first cavity and the second cavity respectively;

[0066] The small tube portion is connected to the two large tube portions, and the inner diameter of the small tube portion is smaller than the inner diameter of the large tube portion.

[0067] Specifically, the shape of the nozzle may be a Venturi tube, wherein the large tube portion is a contraction section and a diffusion section, and the small tube portion is a throat.

[0068] In the present application, the flow control device comprises:

[0069] Inner pipe, connected to interlayer packer or drop packer;

[0070] An outer tube is sleeved on the outer side of the inner tube;

[0071] The independently distributed first cavity and second cavity are formed between the inner tube and the outer tube. The first cavity is connected to the inner tube, and the second cavity is connected to the outside of the column and is connected to the first cavity through a plurality of nozzles evenly distributed circumferentially.

[0072] Specifically, the inner tube and the outer tube can be hollow cylinders, the inner tube and the outer tube can be coaxially arranged, the first cavity and the inner tube are connected through multiple liquid inlets, the liquid inlets can be a screen structure to prevent impurities in the steam from entering the first cavity and clogging the nozzle, the first cavity and the second cavity are not connected to each other, and are only connected through multiple circumferentially evenly distributed nozzles, the second cavity is connected to the outside of the pipe column, mainly refers to the space between the second cavity connecting the casing and the outer tube.

[0073] In the present application, the flow control device further comprises:

[0074] The first joint and the second joint are respectively arranged at two ends of the inner tube in the axial direction;

[0075] The annular ring is sleeved on the outer side of the inner tube, the first cavity is formed between the annular ring, the first joint, the inner tube and the outer tube, and the second cavity is formed between the annular ring, the second joint, the inner tube and the outer tube.

[0076] Specifically, the first joint is used to connect the interlayer packer or the drop-away packer, and the first joint can be connected to the interlayer packer or the drop-away packer by means of threads. The second joint is used to connect the interlayer packer or the plug, and the second joint can be connected to the interlayer packer or the plug by means of threads.

[0077] In the present application, the first cavity is arranged at an end close to the hands-free packer, and the second cavity is arranged at an end away from the hands-free packer.

[0078] In the present application, the nozzle aperture and number of the flow control device are set according to the production conditions of the corresponding oil layer, including:

[0079] Obtaining a preset activation state, and obtaining a preset aperture and a preset number of nozzles according to the preset activation state;

[0080] Measure the production status of the oil layer and obtain the actual production status;

[0081] The preset activation state and the actual activation state are compared, and the preset aperture and / or the preset number of the nozzles are adjusted to obtain the actual aperture and the actual number of the nozzles.

[0082] Specifically, measuring the production status of the oil layer can be carried out by using existing measuring means, and the comparison of the preset production status and the actual production status, adjusting the preset aperture and / or the preset number of the nozzles, and obtaining the actual aperture and the actual number of the nozzles includes:

[0083] If the actual mobilization condition is better than the preset mobilization condition, the aperture of the nozzle is reduced or the number of the nozzle is reduced based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and number of the nozzle;

[0084] If the actual mobilization condition is the same as the preset mobilization condition, the preset aperture and the preset number of the nozzles remain unchanged, and the actual aperture and the number of the nozzles are obtained;

[0085] If the actual operation condition is worse than the preset operation condition, the aperture of the nozzle is increased or the number of the nozzle is increased based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and the number of the nozzle.

[0086] In the present application, the outer tube is provided with a plurality of sieve holes communicating with the outside of the pipe column.

[0087] Specifically, the aperture of the sieve holes may be smaller than the particle size of sand and gravel, so that the outer tube has a sand prevention effect.

[0088] In the present application, the drop-hand column comprises:

[0089] A tubular body, wherein the oil pump is arranged on the tubular body;

[0090] The thermal insulation packer connects the tubing body and the drop packer.

[0091] In summary, the flow control device can be used to inject steam into different oil layers at the same time. Different apertures or different numbers of nozzles are used for oil layers with different production conditions. If the production condition of the oil layer is good, a smaller aperture and or a smaller number of nozzles are used. Conversely, if the production condition of the oil layer is poor, a larger aperture and or a larger number of nozzles are used to accurately control the steam injection amount and liquid production of each oil layer to achieve the requirements of balanced steam injection and oil production.

[0092] According to a second aspect of an embodiment of the present application, a layered controllable injection-production process is provided, comprising:

[0093] The layered controllable injection and production string is lowered into the casing, and the position of the flow control device matches the corresponding oil layer;

[0094] The release packer and interlayer packer are pressed, and the sealing mechanism and interlayer packer seal the space between the injection and production pipe string and the casing. The pressure is continued, the release pin is sheared off, the release pipe string is lifted up, and the release pipe string drives the release mechanism to move, the release mechanism and the anchoring mechanism are separated, and the anchoring mechanism, the sealing mechanism, the injection and production pipe string and the plug are left in the casing;

[0095] Steam is injected into the casing through the hand-dropping pipe string, and the steam enters the flow control device;

[0096] Steam enters the space between the injection and production pipe string and the casing through the nozzle, and then enters the corresponding oil layer to complete the steam injection work of the corresponding oil layer. The casing is provided with a connecting hole corresponding to the oil layer to facilitate the steam to enter the corresponding oil layer, and the produced liquid enters the casing from the corresponding oil layer;

[0097] After the steam injection is completed, the tubing string is kept still, the plunger and sucker rod of the oil pump are lowered into the injection-production tubing string, the oil pump is started, and the oil production work is completed. During oil production, the flow direction of the liquid is opposite to the flow direction of the steam. Not keeping the tubing string still means not taking out the injection-production tubing string, so that the injection-production tubing string can be used for both steam injection and oil production, which simplifies the procedure of lowering the tubing string and improves the work efficiency of steam injection and oil production.

[0098] When the oil pump is a ball-dropping type oil pump, after the steam injection is completed, the pipe string does not move, and a fixed valve ball is dropped from the wellhead. The fixed valve ball falls on the valve seat under the action of its own weight. Then the plunger and sucker rod of the oil pump are lowered into the injection and production pipe string, and the oil pump is started. The well can be started for production and the oil production work is completed.

[0099] Specifically, when steam is injected into the casing through the drop-hand pipe string, the speed of the injected steam is controlled so that the steam flow rate in the small tube part is equal to the speed of sound. When the steam flow rate in the small tube part is equal to the speed of sound, a blockage phenomenon will occur, so that the steam flow rate in the small tube part is always the speed of sound and is not limited by the oil layer pressure. In the production stage, hot water flash evaporation is promoted and the low pressure state inside the nozzle is maintained without affecting the crude oil production, thereby improving the development effect.

[0100] The present application can perform steam injection and oil production work successively through the injection-production pipe string, and has the advantage of simple operation procedures.

[0101] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "one" or "an" preceding a component does not exclude the presence of multiple such components. The present application may be implemented by means of hardware including several different components and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

[0102] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A layered controllable injection and production string, characterized in that: It comprises a release string, a release packer, an injection and production string and a plug connected in sequence along the axial direction, the release string is provided with an oil pump, the injection and production string comprises a plurality of flow control devices distributed along the axial direction and an interlayer packer connected to adjacent flow control devices, the flow control device is arranged corresponding to the oil layer, the inside of the flow control device and the outside of the string are connected through a plurality of nozzles evenly distributed in the circumferential direction, and the nozzle diameter and number of the flow control device are arranged according to the production condition of the corresponding oil layer.

2. The layered controllable injection and production string according to claim 1, characterized in that: The release packer comprises an anchoring mechanism, a sealing mechanism and a release mechanism, the release mechanism is connected to the release packer, and the release mechanism comprises a release pin.

3. The layered controllable injection and production string according to claim 2, characterized in that: The nozzle of the flow control device comprises: Two large tubes are connected to the first cavity and the second cavity respectively; The small tube portion is connected to the two large tube portions, and the inner diameter of the small tube portion is smaller than the inner diameter of the large tube portion.

4. The layered controllable injection and production string according to claim 1, characterized in that: The flow control device comprises: Inner pipe, connected to interlayer packer or drop packer; An outer tube is sleeved on the outer side of the inner tube; The independently distributed first cavity and second cavity are formed between the inner tube and the outer tube. The first cavity is connected to the inner tube, and the second cavity is connected to the outside of the column and is connected to the first cavity through a plurality of nozzles evenly distributed circumferentially.

5. The layered controllable injection and production string according to claim 4, characterized in that: The flow control device also includes: The first joint and the second joint are respectively arranged at two ends of the inner tube in the axial direction; The annular ring is sleeved on the outer side of the inner tube, the first cavity is formed between the annular ring, the first joint, the inner tube and the outer tube, and the second cavity is formed between the annular ring, the second joint, the inner tube and the outer tube.

6. The layered controllable injection and production string according to claim 1, characterized in that: The nozzle aperture and quantity of the flow control device are set according to the producing conditions of the corresponding oil layer, including: Obtaining a preset activation state, and obtaining a preset aperture and a preset number of nozzles according to the preset activation state; Measure the production status of the oil layer and obtain the actual production status; The preset activation state and the actual activation state are compared, and the preset aperture and / or the preset number of the nozzles are adjusted to obtain the actual aperture and the actual number of the nozzles.

7. The layered controllable injection and production string according to claim 6, characterized in that: The comparing of the preset mobilization state and the actual mobilization state, adjusting the preset aperture and / or the preset number of the nozzles, and obtaining the actual aperture and the actual number of the nozzles, comprises: If the actual mobilization condition is better than the preset mobilization condition, the aperture of the nozzle is reduced or the number of the nozzle is reduced based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and number of the nozzle; If the actual mobilization condition is the same as the preset mobilization condition, the preset aperture and the preset number of the nozzles remain unchanged, and the actual aperture and the number of the nozzles are obtained; If the actual operation condition is worse than the preset operation condition, the aperture of the nozzle is increased or the number of the nozzle is increased based on the preset aperture and the preset number of the nozzle to obtain the actual aperture and the number of the nozzle.

8. The layered controllable injection and production string according to claim 1, characterized in that: The drop pipe string comprises: A tubular body, wherein the oil pump is arranged on the tubular body; The thermal insulation packer connects the tubing body and the drop packer.

9. Layered controllable injection and production process, characterized in that: include: The layered controllable injection and production string according to claim 2 or 3 is lowered into the casing, and the position of the flow control device matches the corresponding oil layer; The release packer and interlayer packer are pressed, and the sealing mechanism and interlayer packer seal the space between the injection and production pipe string and the casing. The pressure is continued, the release pin is sheared off, the release pipe string is lifted up, and the release pipe string drives the release mechanism to move, the release mechanism and the anchoring mechanism are separated, and the anchoring mechanism, the sealing mechanism, the injection and production pipe string and the plug are left in the casing; Steam is injected into the casing through the hand-dropping pipe string, and the steam enters the flow control device; Steam enters the space between the injection and production pipe string and the casing through the nozzle, and then enters the corresponding oil layer to complete the steam injection work in the corresponding oil layer; After the steam injection is completed, the plunger and sucker rod of the oil pump are lowered into the injection and production tubing string without moving the tubing string, the oil pump is started, and the oil production work is completed.

10. The stratified controllable injection-production process according to claim 9, characterized in that: The layered controllable injection and production string of claim 3 is lowered into the casing, and the position of the flow control device matches the corresponding oil layer; The release packer and interlayer packer are pressed, and the sealing mechanism and interlayer packer seal the space between the injection and production pipe string and the casing. The pressure is continued, the release pin is sheared off, the release pipe string is lifted up, and the release pipe string drives the release mechanism to move, the release mechanism and the anchoring mechanism are separated, and the anchoring mechanism, the sealing mechanism, the injection and production pipe string and the plug are left in the casing; Inject steam into the casing through the hand-dropping pipe string, control the speed of steam injection so that the steam flow rate in the small pipe is equal to the speed of sound, and the steam enters the flow control device; Steam enters the space between the injection and production pipe string and the casing through the nozzle, and then enters the corresponding oil layer to complete the steam injection work in the corresponding oil layer; After the steam injection is completed, the plunger and sucker rod of the oil pump are lowered into the injection and production tubing string without moving the tubing string, the oil pump is started, and the oil production work is completed.

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