CN219197301U - Gas injection device of gas injection well - Google Patents
Gas injection device of gas injection well Download PDFInfo
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- CN219197301U CN219197301U CN202223236872.7U CN202223236872U CN219197301U CN 219197301 U CN219197301 U CN 219197301U CN 202223236872 U CN202223236872 U CN 202223236872U CN 219197301 U CN219197301 U CN 219197301U
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Abstract
The embodiment of the disclosure relates to an air injection device of an air injection well, which comprises a plurality of injection allocation devices and a ground controller, wherein each injection allocation device comprises an upper joint, a control nipple, an air nozzle nipple, an outer protection pipe and a lower joint; the upper joint, the control nipple and the air nozzle nipple are sequentially connected; the outer protection pipe is arranged at the periphery of the control nipple and the air nozzle nipple; the lower joint is provided with an air outlet, an air outlet channel and an air tap electric control switch; and a gas channel is formed between the outer protective tube and the control nipple and between the outer protective tube and the air nozzle nipple, the upper end of the gas channel is communicated with the air inlet channel, the lower end of the gas channel is communicated with the air outlet channel, and the air outlet channel is provided with a gas flow measuring device. In this embodiment, by setting a plurality of injection distributors, the gas injection amount of each injection distributor is measured by using the gas flow measuring device, and the injection distributors can automatically adjust the opening of the gas outlet according to the preset flow, so as to realize layered gas injection. The manual workload is reduced; the gas injection quantity is monitored and regulated in real time, so that the safety and the accuracy are improved.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of oilfield development, in particular to a gas injection device of a gas injection well.
Background
With the deep development of oil reservoir exploration, the proportion of low permeability oil reservoir reserves is continuously increased, and efficient and reasonable development of low permeability oil reservoirs is becoming increasingly important. The low-permeability oil reservoir has the characteristic of low reservoir permeability, and the characteristic of low water absorption capacity of a water injection well and poor development effect are reflected in the water injection development process. Because the gas can effectively reduce the viscosity of crude oil, improve the fluidity ratio and reduce the interfacial tension, the gas injection can effectively develop low-permeability oil reservoirs, improve the oil reservoir utilization degree and play an important role in oil field development.
The gas injection and distribution device in the current market has the technical problems of poor gas injection safety and accuracy.
Accordingly, there is a need to improve one or more problems in the related art as described above.
It is noted that this section is intended to provide a background or context for the technical solutions of the present disclosure as set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
It is an object of embodiments of the present disclosure to provide a gas injection apparatus of a gas injection well, which overcomes one or more problems due to limitations and disadvantages of the related art, at least to some extent.
The embodiment of the disclosure provides a gas injection device of a gas injection well, comprising: the injection allocation device comprises a plurality of injection allocation devices and a ground controller, wherein every two adjacent injection allocation devices are connected through a packer, and each injection allocation device comprises: the device comprises an upper joint, a control nipple, an air nozzle nipple, an outer protection pipe and a lower joint;
wherein, an air inlet channel is arranged in the upper joint;
the upper end of the control nipple is connected with the upper joint, the lower end of the control nipple is connected with the upper end of the air nozzle nipple, and the lower end of the air nozzle nipple is connected with the lower joint;
the outer protection pipe is arranged on the peripheries of the control nipple and the air nozzle nipple, the upper end of the outer protection pipe is connected with the upper joint, and the lower end of the outer protection pipe is connected with the lower joint;
the lower joint is provided with an air outlet, an air outlet channel and an air tap electric control switch for controlling the ventilation of the air outlet and the air outlet channel, and the air outlet is arranged on the side wall of the air outlet channel and is communicated with the air outlet channel;
the outer protection pipe is communicated with the air inlet channel, the lower end of the air channel is communicated with the air outlet channel, and the air outlet channel is provided with an air flow measuring device;
the air tap electric control switch and the air flow measuring device are respectively connected with the ground controller.
In one embodiment of the disclosure, a centralizer is disposed on a portion of the circumference of the injection distributor.
In an embodiment of the disclosure, the upper connector and the lower connector are both provided with cable connectors.
In an embodiment of the disclosure, the control nipple and the air nozzle nipple are connected through a transfer joint.
In an embodiment of the disclosure, the transfer joint is provided with a pressure measurement assembly, and the pressure measurement assembly is connected with the ground controller.
In an embodiment of the present disclosure, the pressure measuring assembly includes a plurality of pressure sensors that measure an inner pressure, an outer pressure, and an inner-outer pressure difference of the outer sheath, respectively.
In an embodiment of the disclosure, a temperature measuring device is arranged on the transfer joint and is used for measuring the temperature of the gas in the outer protection pipe, and the temperature measuring device is connected with the ground controller.
In an embodiment of the disclosure, the connection relationship between the control nipple and the air nozzle nipple is threaded connection.
In an embodiment of the disclosure, a sealing connection is provided between the control nipple and the air nozzle nipple.
In an embodiment of the disclosure, the control nipple and the air nozzle nipple are in sealing connection by adopting a metal conical sealing device.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
according to the gas injection device of the gas injection well, the plurality of injection allocation devices are arranged, the gas outlet and the gas flow measuring device are arranged on each injection allocation device, the gas injection quantity of each injection allocation device is measured by the gas flow measuring device, then each gas outlet is controlled to inject gas into the current layer according to the preset flow, and the injection allocation devices can automatically adjust the opening of the gas outlet according to the preset flow, so that layered gas injection is realized. The layered gas injection is realized, and the manual workload is reduced; the gas injection quantity can be monitored and regulated in real time, and the safety and accuracy of gas injection work are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
FIG. 1 illustrates a schematic block diagram of a gas injection apparatus of a gas injection well in an exemplary embodiment of the present disclosure;
FIG. 2 illustrates an external structural schematic of an injection dispenser in an exemplary embodiment of the present disclosure;
FIG. 3 illustrates an internal structural schematic of an injection dispenser in an exemplary embodiment of the present disclosure;
fig. 4 shows a schematic diagram of the positional relationship of the gas flow measurement device in the lower joint in the exemplary embodiment of the present disclosure.
Reference numerals:
100. a dispenser; 101. an upper joint; 102. controlling the short section; 103. an air tap nipple; 104. an outer protective tube; 105. a lower joint; 1051. an air outlet; 1052. a gas flow measuring device; 106. a transfer joint; 1061. a pressure measurement assembly; 200. a packer; 300. a centralizer; 400. a cable joint.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
In this example embodiment, a gas injection apparatus for a gas injection well is provided, as shown in fig. 1 to 3, and may include: a plurality of dispensers 100 and a surface controller. Connection between every two adjacent injection distributors 100 is achieved through a packer 200. Each of the dispensers 100 includes: upper joint 101, control nipple 102, air cock nipple 103, outer sheath 104 and lower joint 105.
Specifically, an air inlet channel is provided in the upper joint 101, that is, the gas to be injected into the well enters the injector 100 from the air inlet channel.
The upper end of the control nipple 102 is connected with the upper connector 101, the lower end of the control nipple 102 is connected with the upper end of the air tap nipple 103, and the lower end of the air tap nipple 103 is connected with the lower connector 105.
The outer protection pipe 104 is arranged on the periphery of the control nipple 102 and the air nozzle nipple 103, the upper end of the outer protection pipe 104 is connected with the upper joint 101, and the lower end of the outer protection pipe 104 is connected with the lower joint 105.
The lower joint 105 is provided with an air outlet 1051, an air outlet channel and an air tap electric control switch for controlling the ventilation volume of the air outlet 1051 and the air outlet channel. The opening and closing and opening degree of the air outlet 1051 are adjusted by the air tap electric control switch so as to control the injected air flow from the air outlet 1051. And controlling the air flow flowing into the next injection allocation device 100 from the current injection allocation device 100 by utilizing the air tap electric control switch so as to realize layered gas injection. The air outlet 1051 is disposed on a sidewall of the air outlet channel and is in communication with the air outlet channel.
The annulus between the outer protection pipe 104 and the control nipple 102 and the air tap nipple 103 is a gas channel, the upper end of the gas channel is communicated with the air inlet channel, the lower end of the gas channel is communicated with the air outlet channel, namely, the main route of gas flow is as follows: gas enters from the upper sub 101, flows through the gas passage of the annulus and then exits from the lower sub 105 to enter the next associated injector 100. As shown in fig. 4, the arrow to the left in fig. 4 indicates the path of gas from the gas outlet channel of the lower joint 105 to the next dispenser 100; the gas outlet channel is communicated with the gas outlet 1051, and a gas flow measuring device 1052 is arranged on a channel between the gas outlet channel and the gas outlet 1051, so that the flow of the gas passing through the gas outlet 1051 can be measured. The gas flows through the gas flow measuring device 1052 and then out of the gas outlet 1051 to be injected into the floor dispenser 100 (the arrows to the right and up in fig. 4 indicate the route of the gas flowing out of the gas outlet 1051).
In general, when injecting gas, a part of gas flows to the next section of injector 100, a part of gas flows out from the gas outlet 1051 to inject gas, the opening of the gas outlet 1051 is controlled by the air tap nipple 103 and the air tap electric control switch, and the air tap nipple 103 can reciprocate in a channel leading to the gas outlet 1051 to block or avoid the gas outlet 1051, so as to realize the adjustment of the opening. The air tap electric control switch and the air flow measuring device 1052 are respectively connected with the ground controller.
In this embodiment, by providing a plurality of injection distributors 100, each injection distributor 100 is provided with an air outlet 1051 and an air flow measuring device 1052, the air injection amount of each injection distributor 100 is measured by using the air flow measuring device 1052, then each air outlet 1051 injects air to the current layer according to a preset flow, and the injection distributors 100 can automatically adjust the opening of the air outlet 1051 according to the preset flow to realize layered air injection. The layered gas injection is realized, and the manual workload is reduced; the gas injection quantity can be monitored and regulated in real time, and the safety and accuracy of gas injection work are improved.
When the gas injection device of the gas injection well is used for injecting gas into the low-permeability oil reservoir, the gas flow of different parts in the horizontal well can be controlled, and the stable gas pressure in the shaft can be ensured.
Optionally, in some embodiments, a centralizer 300 is provided on a portion of the circumference of the dispenser 100 to fix the position of the dispenser 100, preventing the dispenser 100 from shifting to align with the correct insufflating position.
Optionally, in some embodiments, as shown in fig. 2, the upper connector 101 and the lower connector 105 are provided with a cable connector 400, where the cable connector 400 on the lower connector 105 is not shown in the drawing, and the cable connector 400 is used to establish an electrical channel and an information transmission control channel.
Optionally, in some embodiments, the control nipple 102 and the air nozzle nipple 103 are connected by a transit joint 106. Further optionally, in some embodiments, the connection between the control nipple 102 and the air cap nipple 103 is a threaded connection. Adopt threaded connection mode, connect convenient quick, but each nipple joint independent operation.
Optionally, in some embodiments, a pressure measurement assembly 1061 is provided on the transfer joint 106, where the pressure measurement assembly 1061 is connected to the surface controller. Further optionally, in some embodiments, the pressure measurement assembly 1061 includes a plurality of pressure sensors that measure the internal pressure, the external pressure, and the internal-external pressure differential of the outer sheath 104, respectively. The pressure data are measured and collected, and then the gas injection is carried out on the stratum pressures of different layers by combining the gas injection quantity data and the like, so that the control is more accurate and timely. The method realizes accurate injection and adjustment of each layered gas injection of the oil and gas well, and provides true and accurate dynamic monitoring data for oil field development.
Optionally, in some embodiments, a temperature measurement device is disposed on the transit joint 106, and is configured to measure a temperature of the gas in the outer protection pipe 104, where the temperature measurement device is connected to the ground controller. The temperature of the gas is measured by a temperature measuring device, and the supercritical CO can be calculated by a gas equation by combining the collected pressure value 2 And the calculation of the flow rate is more accurate by combining an algorithm so as to more accurately adjust the gas injection amount.
Optionally, in some embodiments, a sealed connection is used between the packer 200 and the injection distributor 100. Further optionally, in some embodiments, the packer 200 and the injection allocation device 100 are in sealing connection by using a metal conical sealing device, so that the sealing effect is improved, and the flow rate of the gas flowing through each injection allocation device 100 can be precisely controlled.
The injection allocation device 100 in the gas injection device of the gas injection well provided by the embodiment is connected with the oil pipe, and is arranged along with the oil pipe to go down the well, each injection allocation device 100 is installed on each gas injection layer, each underground injection allocation device 100 is connected in series and then connected to a ground controller through a cable, and the ground controller provides power supply and bidirectional communication for each underground injection allocation device 100 through the cable. The underground gas injection information can be detected for a long time and transmitted to the ground in real time, so that the gas injection measurement work realizes synchronous data acquisition and data analysis, the decision is more timely, and the test application efficiency is improved. The gas injection test and layered gas injection can be completed only by one-time pipe injection construction, so that a large amount of manpower and material resources are saved. Can work underground for a long time and can be used in highly deviated wells and horizontal wells. The device wholly adopts modularized structural design, comprises device body and each nipple, adopts quick threaded connection's electric connection method between the nipple, and each nipple can independently produce, independently tests and verifies.
In the above embodiment, the air tap nipple 103 is provided with an air tap switch, and an integrated structure design may be adopted to integrate the circuit and the air tap adjusting system. The structure can adopt a balance pressure structure, and can avoid the influence of underground high pressure on the air tap switch adjustment.
In addition, the gas flow measuring device 1052 can adopt the differential pressure orifice plate principle, is matched with an ultra-high precision sensor, reduces the structural pressure loss, improves the measuring precision, has higher measuring precision, has a larger structural flow measuring range, can adapt to small discharge capacity, and expands the measuring range in general.
It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the embodiments of the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A gas injection apparatus for a gas injection well, comprising: the injection allocation device comprises a plurality of injection allocation devices and a ground controller, wherein every two adjacent injection allocation devices are connected through a packer, and each injection allocation device comprises: the device comprises an upper joint, a control nipple, an air nozzle nipple, an outer protection pipe and a lower joint;
wherein, an air inlet channel is arranged in the upper joint;
the upper end of the control nipple is connected with the upper joint, the lower end of the control nipple is connected with the upper end of the air nozzle nipple, and the lower end of the air nozzle nipple is connected with the lower joint;
the outer protection pipe is arranged on the peripheries of the control nipple and the air nozzle nipple, the upper end of the outer protection pipe is connected with the lower upper joint, and the lower end of the outer protection pipe is connected with the lower joint;
the lower joint is provided with an air outlet, an air outlet channel and an air tap electric control switch for controlling the ventilation of the air outlet and the air outlet channel, and the air outlet is arranged on the side wall of the air outlet channel and is communicated with the air outlet channel;
the outer protection pipe is communicated with the air inlet channel, the lower end of the air channel is communicated with the air outlet channel, and the air outlet channel is provided with an air flow measuring device;
the air tap electric control switch and the air flow measuring device are respectively connected with the ground controller.
2. The gas injection apparatus of claim 1, wherein a portion of the circumference of the injection distributor is provided with centralizers.
3. The gas injection apparatus of claim 1, wherein cable connectors are provided on both the upper connector and the lower connector.
4. The gas injection apparatus of claim 1, wherein the control nipple and the nipple are connected by a transfer joint.
5. The gas injection apparatus of claim 4, wherein the transfer joint is provided with a pressure measurement assembly, and wherein the pressure measurement assembly is coupled to the surface controller.
6. The gas injection apparatus of claim 5, wherein the pressure measurement assembly comprises a plurality of pressure sensors that measure the internal pressure, the external pressure, and the internal-external pressure differential of the outer sheath, respectively.
7. The gas injection device of the gas injection well according to claim 4, wherein a temperature measuring device is arranged on the transfer joint and used for measuring the temperature of the gas in the outer protection pipe, and the temperature measuring device is connected with the ground controller.
8. A gas injection apparatus for a gas injection well as claimed in any one of claims 1 to 7, wherein the connection between the control nipple and the nipple is a threaded connection.
9. A gas injection apparatus for a gas injection well as claimed in any one of claims 1 to 7 wherein a sealing connection is provided between the control nipple and the nipple.
10. The gas injection apparatus of claim 9, wherein the control nipple and the nipple are sealingly connected by a metallic cone seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223236872.7U CN219197301U (en) | 2022-12-02 | 2022-12-02 | Gas injection device of gas injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223236872.7U CN219197301U (en) | 2022-12-02 | 2022-12-02 | Gas injection device of gas injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219197301U true CN219197301U (en) | 2023-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223236872.7U Active CN219197301U (en) | 2022-12-02 | 2022-12-02 | Gas injection device of gas injection well |
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|---|---|
| CN (1) | CN219197301U (en) |
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2022
- 2022-12-02 CN CN202223236872.7U patent/CN219197301U/en active Active
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