A compact cable dispenser

Abstract

This invention discloses a compact cable-operated dispenser, comprising an upper connector and a lower connector. The upper connector contains a flow channel, a regulating channel, and an oil pipe pressure channel. The head end of the flow channel connects to a conductive channel via an inner hole. The two ends of the conductive channel connect to the regulating channel and the oil pipe pressure channel, respectively. The regulating channel connects to the outside via an outlet on the upper connector. The upper and lower connectors are fixedly connected by a connecting pipe. The connecting pipe contains an eccentric tube, a flow measurement component, an electric nozzle component, and an oil pipe pressure component. The eccentric hole of the lower connector connects to a flow test channel via a side hole. The front end of the flow test channel connects to the flow channel. The tail end of the regulating channel connects to the head end of the electric nozzle component. The tail end of the oil pipe pressure channel connects to the head end of the oil pipe pressure component. This invention is particularly suitable for applications requiring a simple, compact structure and low cost, solving the problems of existing cable-operated dispensers being complex, long, heavy, and costly.

Description

Technical Field

[0001] This invention relates to a compact cable-operated injector, belonging to the field of oilfield downhole instrument technology. Background Technology

[0002] In the later stages of oilfield development, formation energy is continuously lost, leading to a significant decrease in oil recovery rate. Water injection is one of the most effective methods to replenish formation energy and improve recovery rate. Among these methods, stratified water injection technology is even more effective, effectively reducing inter- and intra-stratum differences and achieving balanced injection and production development. Various oilfields in China are gradually promoting the use of cable-operated intelligent water injection systems to achieve real-time monitoring, automatic allocation, and automatic seal verification throughout the entire water injection process, significantly reducing labor costs.

[0003] A cabled intelligent injection system typically consists of a downhole cabled injection unit, a surface control box, downhole cables, and protective clamps, with the downhole cabled injection unit being the core component. Currently, cabled injection units offered by various domestic manufacturers employ different or similar technical approaches and have varying structural layouts, but they generally suffer from the following problems:

[0004] a) The overall structure and layout of the existing downhole cable-operated injection equipment is still relatively complex, resulting in an excessively long instrument (generally not less than 1.3m) and heavy weight (generally not less than 50kg), which is not conducive to on-site installation and transportation, especially when the wellhead working space is narrow and the ground is slippery; in addition, the excessively long instrument makes it impossible to further inject water into layers with close interlayer spacing, which cannot meet the needs of thin oil layer development.

[0005] b) The complex layout structure results in numerous internal threaded connections and sealing components, which reduces the reliability of the instrument during long-term downhole operation and makes subsequent maintenance difficult.

[0006] c) The complex layout structure results in high instrument costs, making it unsuitable for the low-cost requirements of large-scale product promotion in the later stages. Summary of the Invention

[0007] The purpose of this invention is to provide a compact cable dispenser. This invention is particularly suitable for applications requiring a simple, compact structure and low cost, thereby solving the problems of existing cable dispensers being complex in structure, long in length, heavy in weight, and expensive.

[0008] The technical solution of the present invention is as follows: A compact cable dispenser includes an upper connector and a lower connector with cable joints. Both the upper and lower connectors have eccentric holes along their length. The upper connector also has a flow channel, an adjustment channel, and an oil pipe pressure channel along its length. The head end of the flow channel is connected to a conducting channel through an inner hole. The two ends of the conducting channel are connected to the adjustment channel and the oil pipe pressure channel, respectively. The adjustment channel is connected to the outside through an outlet on the upper connector. The upper and lower connectors are fixedly connected by a connecting pipe. The connecting pipe has an eccentric tube, a flow measurement component, an electric water nozzle component, and an oil pipe pressure component eccentrically arranged along its length. The two ends of the eccentric tube are connected to the eccentric holes inside the upper and lower connectors. The eccentric hole of the lower connector is connected to the flow test channel inside the flow measurement component through a side hole. The front end of the flow test channel is connected to the flow channel. The tail end of the adjustment channel is connected to the head end of the electric water nozzle component. The tail end of the oil pipe pressure channel is connected to the head end of the oil pipe pressure component.

[0009] In the aforementioned compact cable-operated injector, a formation pressure component is eccentrically arranged inside the connecting pipe along its length; a formation pressure measurement channel is also arranged inside the upper connector along its length, the tail end of the formation pressure measurement channel is connected to the head end of the formation pressure component, and the head end of the formation pressure measurement channel is connected to the outside through the water inlet on the upper connector.

[0010] In the aforementioned compact cable dispenser, the inner wall of the connecting tube is provided with threads of opposite directions at both ends. The connecting tube is connected to the upper and lower connectors by threads with sealing, and multiple O-rings are provided.

[0011] In the aforementioned compact cable dispenser, the eccentric tube and flow measurement assembly are respectively sealed with upper and lower connectors by O-rings, and the heads of the electric water nozzle assembly, oil pipe pressure assembly and formation pressure assembly are connected to the upper connector by threads with sealing, and multiple O-rings are provided.

[0012] In the aforementioned compact cable dispenser, a circuit board assembly is also provided inside the cavity between the eccentric tube and the connecting tube.

[0013] The beneficial effects of this invention are as follows: Compared with the prior art, this invention, by eccentrically arranging an eccentric tube and a flow measurement component inside the connecting pipe, allows the remaining cavity inside the connecting pipe to be used for installing the circuit board assembly, electric water nozzle assembly, oil pipe pressure assembly, and formation pressure assembly. This gives the dispenser of this invention the following advantages:

[0014] a) The cable dispenser of the present invention has a simple and compact structure and low cost;

[0015] b) The instrument is approximately 0.7m long and weighs approximately 25kg, which greatly facilitates on-site installation and handling;

[0016] c) The instrument, when used with a compact over-cable packer, can be used in water injection wells with small interlayer spacing, meeting the needs of thin oil layer development;

[0017] d) The present invention has a simple structural layout, relatively few components, good manufacturability and assembly processability, and is easy to achieve mass production and control costs; the larger parts are only the upper connector, lower connector and connecting pipe; the remaining components are all small in size and simple in structure.

[0018] e) The overall layout is simple, with fewer threaded connections and sealing components, resulting in high long-term reliability and low maintenance costs, thus achieving further cost reduction. Attached Figure Description

[0019] Appendix Figure 1 This is a cross-sectional structural diagram of the present invention;

[0020] Appendix Figure 2 for Figure 1 A schematic diagram of the AA-direction cross-section structure;

[0021] Appendix Figure 3 for Figure 1 Schematic diagram of the DD-direction cross-section structure;

[0022] Appendix Figure 4 for Figure 2 Schematic diagram of the BB-direction cross-section structure;

[0023] Appendix Figure 5 for Figure 2 Schematic diagram of the CC-direction cross-section structure;

[0024] Appendix Figure 6 for Figure 3 A schematic diagram of the EE cross-section structure.

[0025] Reference numerals: 1-Cable connector, 2-Upper connector, 3-Connecting pipe, 4-Flow measurement assembly, 5-Eccentric pipe, 6-Lower connector, 7-Circuit board assembly, 8-Electric water nozzle assembly, 9-Oil pipe pressure assembly, 10-Formation pressure assembly, 11-Flow test channel, 12-Flow channel, 13-Inner hole, 14-Conducting channel, 15-Adjusting channel, 16-Oil pipe pressure channel, 17-Outlet, 18-Formation pressure measurement channel, 19-Inlet. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0027] An embodiment of the present invention: a compact cable dispenser, such as Figure 1-6As shown, the device includes an upper connector 2 and a lower connector 6, each equipped with a cable connector 1. Both the upper connector 2 and the lower connector 6 have eccentric holes along their length. The upper connector 2 also has a flow channel 12, a regulating channel 15, and an oil pipe pressure channel 16 along its length. The head of the flow channel 12 connects to the middle of a guiding channel 14 inside the upper connector 2 via an inner hole 13. The two ends of the guiding channel 14 connect to the regulating channel 15 and the oil pipe pressure channel 16, respectively. The regulating channel 15 connects to the outside via a water outlet 17 on the upper connector 2. The upper connector 2 and the lower connector 6... The components are fixedly connected by a connecting pipe 3. Inside the connecting pipe 3, an eccentric pipe 5, a flow measurement component 4, an electric water nozzle component 8, and an oil pipe pressure component 9 are eccentrically arranged along its length. The two ends of the eccentric pipe 5 are connected to the eccentric holes inside the upper connector 2 and the lower connector 6. The eccentric hole inside the lower connector 6 is connected to the flow test channel 11 inside the flow measurement component 4 through a side hole. The front end of the flow test channel 11 is connected to the flow channel 12. The tail end of the adjustment channel 15 is connected to the head end of the electric water nozzle component 8. The tail end of the oil pipe pressure channel 16 is connected to the head end of the oil pipe pressure component 9.

[0028] Inside the connecting pipe 3, a formation pressure component 10 is eccentrically arranged along its length; inside the upper connector 2, a formation pressure measurement channel 18 is arranged along its length, the tail end of the formation pressure measurement channel 18 is connected to the head end of the formation pressure component 10, and the head end of the formation pressure measurement channel 18 is connected to the outside through the water inlet 19 on the upper connector 2.

[0029] The inner wall of the connecting pipe 3 is provided with threads of opposite directions at both ends. The connecting pipe 3 is connected to the upper connector 2 and the lower connector 6 by threads and sealing, and multiple O-rings are provided to achieve sealing at the connection.

[0030] Both the eccentric tube 5 and the flow measurement component 4 are eccentrically arranged, and their two ends are sealed with O-rings to the upper connector 2 and the lower connector 6 respectively. After the upper connector 2 and the lower connector 6 are connected and fixed to the connecting pipe 3, the eccentric tube 5 and the flow measurement component 4 can be pressed and fixed by the upper connector 2 and the lower connector 6.

[0031] The head ends of the electric water nozzle assembly 8, the oil pipe pressure assembly 9, and the formation pressure assembly 10 are connected to the upper connector 2 by threads with sealing, and multiple O-ring seals are provided.

[0032] Multiple circuit board assemblies 7 are also provided inside the cavity between the eccentric tube 5 and the connecting tube 3.

[0033] The main components of the dispenser of the present invention are: upper connector 2, connecting pipe 3, lower connector 6, eccentric pipe 5, flow measurement component 4, and components installed on the upper connector 2: two sets of pressure components, namely oil pipe pressure component 9 and formation pressure component 10, electric water nozzle component 8, multiple sets of circuit board components 7, and cable connectors 1 on both sides.

[0034] Except for the cable connectors 1 on both sides, all other small components are located in the sealed space inside the connecting pipe 3.

[0035] The connecting pipe 3 is threaded to both the upper connector 2 and the lower connector 6, and the threads are both positive and negative. In use, align the eccentric holes of the upper connector 2 and the lower connector 6, and rotate the connecting pipe 3 to move the two parts towards the center without rotating them. This achieves both axial docking of multiple sets of holes on the two parts and reliable threaded connection between the three larger parts.

[0036] During use, water flows from above the instrument ( Figure 1 The tubing on the left enters the central channel, passes through the eccentric tube 5 and the lateral hole of the lower connector 6, and enters the flow test channel 11 and flow channel 12. Then it passes through the inner hole 13 of the upper connector 2 and the conduction channel 14 for diversion. The diversion diagram is shown in the cross-sectional view AA. As shown in the cross-sectional view BB, one path enters the regulating channel 15 and reaches the inlet of the electric water nozzle assembly 8. After being regulated by the electric water nozzle assembly 8, it reaches the formation from the outlet 17. As shown in the cross-sectional view CC, another path enters the tubing pressure channel 16 and reaches the tubing pressure assembly 9. The pressure sensor of the tubing pressure assembly 9 measures the tubing pressure. As shown in the cross-sectional view EE, a separate formation pressure measurement channel 18 is set up. The formation pressure outside the instrument enters the formation pressure measurement channel 18 through the inlet 19 and reaches the tubing pressure assembly 10. The formation pressure is measured by the pressure sensor of the tubing pressure assembly 10.

[0037] The flow measurement component 4 is a miniaturized, high-precision internal flow electromagnetic flow meter; its overall structure is tubular, with the excitation coil and electrodes distributed on its outer circular surface.

[0038] The electric faucet assembly 8 uses a motor to control the forward and backward movement of the ceramic valve core, thereby adjusting the area of ​​the outlet 17 and controlling the water flow.

[0039] The instrument's on-site installation method and operating habits are the same as existing cable-based intelligent injection technology, making it easy for on-site personnel to quickly become familiar with and use the instrument.

[0040] The main improvements of this invention are in the layout and arrangement of the components. The flow measurement component 4, the electric water nozzle component 8, the oil pipe pressure component 9 and the formation pressure component 10 are similar to the existing structures, so their structures will not be described in detail.

Claims

1. A compact cable dispenser, characterized in that: It includes an upper connector (2) and a lower connector (6) equipped with a cable connector (1). Both the upper connector (2) and the lower connector (6) have eccentric holes along their length. The upper connector (2) also has a flow channel (12), an adjustment channel (15) and an oil pipe pressure channel (16) along its length. The head end of the flow channel (12) is connected to the guide channel (14) through the inner hole (13). The two ends of the guide channel (14) are connected to the adjustment channel (15) and the oil pipe pressure channel (16) respectively. The adjustment channel (15) is connected to the outside through the outlet (17) on the upper connector (2). The upper connector (2) and the lower connector (6) are connected by a connecting pipe. (3) Fixed connection, the connecting pipe (3) is eccentrically arranged along its length direction with an eccentric pipe (5), a flow measurement component (4), an electric water nozzle component (8) and an oil pipe pressure component (9). The two ends of the eccentric pipe (5) are connected to the eccentric holes inside the upper connector (2) and the lower connector (6). The eccentric hole inside the lower connector (6) is connected to the flow test channel (11) inside the flow measurement component (4) through a side hole. The front end of the flow test channel (11) is connected to the flow channel (12). The tail end of the adjustment channel (15) is connected to the head end of the electric water nozzle component (8). The tail end of the oil pipe pressure channel (16) is connected to the head end of the oil pipe pressure component (9). The connecting pipe (3) is also eccentrically provided with a formation pressure component (10) along its length; the upper connector (2) is also provided with a formation pressure measurement channel (18) along its length. The tail of the formation pressure measurement channel (18) is connected to the head of the formation pressure component (10), and the head of the formation pressure measurement channel (18) is connected to the outside through the water inlet (19) on the upper connector (2). A circuit board assembly (7) is also provided inside the cavity between the eccentric tube (5) and the connecting tube (3).

2. A compact cable dispenser according to claim 1, characterized in that: The inner wall of the connecting pipe (3) is provided with threads of opposite directions at both ends. The connecting pipe (3) is connected to the upper connector (2) and the lower connector (6) by threads with sealing, and is provided with multiple O-ring seals.

3. A compact cable dispenser according to claim 1, characterized in that: The eccentric tube (5) and flow measurement assembly (4) are respectively sealed with O-rings to the upper connector (2) and lower connector (6). The head ends of the electric water nozzle assembly (8), oil pipe pressure assembly (9) and formation pressure assembly (10) are connected to the upper connector (2) by threaded sealing, and multiple O-rings are provided.

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