Oilfield downhole wireless communication apparatus and method

Abstract

The application relates to the technical field of oil and gas well engineering, in particular to an oilfield downhole wireless communication device and method. The device comprises a sleeve, the sleeve is fixed with an information detection and writing device, a plurality of stop blocks are fixed in the sleeve below the information detection and writing device, a magnetic signal control switch is fixed on the inner side of any stop block, an inner sleeve is clamped in the sleeve, the lower end of the inner sleeve is blocked by the plurality of stop blocks, a magnetic ring for sending a magnetic signal to the magnetic signal control switch is fixed at the lower end of the inner sleeve, a bag-shaped capsule is arranged in the inner sleeve, a counterweight is fixed at the lower end of the capsule, the upper end of the capsule is fixedly connected with the inner sleeve, and a high-temperature-resistant radio frequency electronic tag is fixed on the inner side surface of the capsule. The upwelling well fluid makes the capsule deform, and then the high-temperature-resistant radio frequency electronic tag corresponds to the information detection and writing device, so that the information can be accurately and effectively written into the high-temperature-resistant radio frequency electronic tag.

Description

Technical Field

[0001] This invention relates to the field of oil and gas well engineering technology, specifically to a downhole wireless communication device and method for oil fields. Background Technology

[0002] In the field of oil and gas well engineering, the ability to promptly detect downhole information and understand the condition of deep wells is crucial for the smooth progress and quality improvement of oil and gas well projects. In deep and ultra-deep well production projects, existing information transmission technologies still face challenges in wired and wireless signal transmission. For example, commonly used wireless information transmission technologies such as electrical and magnetic signals are difficult to use for direct downhole-to-surface information transmission in deep and ultra-deep well conditions. Therefore, the difficulty in transmitting downhole information hinders the smooth progress of the project and affects cementing quality. Radio frequency (RF) technology is a mature technology in the field of information transmission. Current deep and ultra-deep well projects use RF technology to write information sensed by in-well sensors onto electronic tags, which are then collected and read. However, the collection of electronic tags using existing transmission devices is cumbersome. Summary of the Invention

[0003] The technical problem to be solved by the present invention is an electronic tag that can conveniently collect and write information, and an oilfield downhole wireless communication device and method that can improve the efficiency of information collection.

[0004] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0005] A downhole wireless communication device for oilfields includes a casing, an information detection and writing device fixed on the casing, multiple blocks fixed inside the casing below the information detection and writing device, a magnetic signal control switch fixed inside any one of the blocks, an inner sleeve snapped into the casing, the lower end of the inner sleeve being blocked by multiple blocks, a magnetic ring for sending magnetic signals to the magnetic signal control switch fixed at the lower end of the inner sleeve, a bag-shaped capsule disposed inside the inner sleeve, a counterweight fixed at the lower end of the capsule, the upper end of the capsule being fixedly connected to the inner sleeve, a high-temperature resistant radio frequency electronic tag fixed on the inner surface of the capsule, when the capsule is flipped up, the high-temperature resistant radio frequency electronic tag corresponds to the information detection and writing device, and the information detection and writing device allows the detected well information to be written into the high-temperature resistant radio frequency electronic tag.

[0006] Specifically, the information detection and writing device includes an electrically connected high-temperature resistant battery pack, a high-temperature resistant sensor, and a high-temperature resistant downhole reader.

[0007] Specifically, the inner sleeve includes an installation cylinder, with multiple skirt-shaped rubber blocks evenly distributed and fixed on the outer circumference of the installation cylinder. The skirt-shaped rubber blocks are in contact with the inner wall of the sleeve. The upper end of the bladder is fixedly connected to the upper end of the installation cylinder, and the magnetic ring is fixed at the lower end of the installation cylinder.

[0008] Specifically, a variable diameter stabilizer is fixed to the outside of the sleeve.

[0009] Specifically, the multiple stops are evenly distributed around the circumference of the sleeve's axis.

[0010] A transmission method for an oilfield downhole wireless communication device is as follows: The casing is lowered to a preset position in the oil well. A variable-diameter centralizer is used to straighten the casing. An installation cylinder is inserted into the casing. The skirt-shaped rubber block at the bottom of the installation cylinder contacts a stop block, positioning the installation cylinder and preventing further downward movement. At this time, the skirt-shaped rubber block is compressed and located within the gap between the installation cylinder and the casing. The magnetic ring is located inside the magnetic signal control switch. After receiving the magnetic signal from the magnetic ring, the magnetic signal control switch activates the information detection and writing device. The high-temperature resistant downhole reader and high-temperature sensor within the information detection and writing device are activated. Well fluid is injected into the annular cavity between the casing and the oil well. After a period of time, the well... The fluid enters the casing and surges upwards. Some of the surging fluid impacts the capsule, while the rest flows upwards through the gaps between the skirt-shaped rubber blocks. The capsule, impacted by the fluid, flips upwards and outwards. After flipping upwards, the high-temperature resistant RFID tag is located on the outside of the capsule and is near the information detection and writing device. At this point, the high-temperature downhole reader writes the environmental information collected by multiple high-temperature sensors into the high-temperature resistant RFID tag. As the fluid continues to surge upwards, the connection between the capsule and the mounting cylinder is broken, and the capsule and mounting cylinder separate and move to the external surface with the fluid. Then, the external reader reads the information on the high-temperature resistant RFID tag.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] This invention fixes a high-temperature resistant radio frequency electronic tag onto a capsule, and uses the upward flow of well fluid to deform the capsule, thereby aligning the high-temperature resistant radio frequency electronic tag with an information detection and writing device. When the high-temperature resistant downhole reader writes the information detected by the high-temperature sensor into the electronic tag, it can ensure that the information is accurately and effectively written into the high-temperature resistant radio frequency electronic tag.

[0013] After the capsule deforms, the high-temperature resistant RFID tag fixed on the capsule can stay in the area corresponding to the information detection and writing device for a set time, thereby ensuring the integrity of the information written into the RFID tag.

[0014] The high-temperature resistant RFID tag is fixed to the casing and discharged from the casing along with the well fluid, which facilitates the collection of the high-temperature resistant RFID tag, prevents the high-temperature resistant RFID tag from being lost, and can effectively read the data information stored in the high-temperature resistant RFID tag. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention.

[0016] Figure 2 for Figure 1 Large map showing the distribution in Area A of China.

[0017] The names of the parts in the attached diagram are:

[0018] 1. Casing; 2. Variable diameter centralizer; 3. Information detection and writing device; 4. Stop; 5. Magnetic signal control switch; 6. Oil well; 7. Installation cylinder; 8. Bag; 9. Counterweight; 10. High temperature resistant RFID tag; 11. Skirt-shaped rubber block; 12. Magnetic ring. Detailed Implementation

[0019] like Figure 1-2 As shown, an oilfield downhole wireless communication device includes a casing 1, with a variable diameter centralizer 2 fixed to the outside of the casing 1. An information detection and writing device 3 is fixed on the casing 1. The device is characterized by having multiple blocks 4 fixed inside the casing 1 below the information detection and writing device 3. These blocks 4 are evenly distributed around the circumference of the casing 1's axis. A magnetic signal control switch 5 is fixed inside any one of the blocks 4. An inner sleeve is snapped into the casing 1, with its lower end blocked by the blocks 4. A magnetic ring 12 for sending magnetic signals to the magnetic signal control switch 5 is fixed to the lower end of the inner sleeve. A bag-shaped capsule 8 is disposed inside the inner sleeve, with a counterweight 9 fixed to its lower end. The upper end of the capsule 8 is fixedly connected to the inner sleeve. A high-temperature resistant radio frequency electronic tag 10 is fixed to the inner surface of the capsule 8. When the capsule 8 is flipped up, the high-temperature resistant radio frequency electronic tag 10 corresponds to the information detection and writing device 3, and the information detection and writing device 3 allows the detected well information to be written into the high-temperature resistant radio frequency electronic tag 10.

[0020] The information detection and writing device 3 includes an electrically connected high-temperature resistant battery pack, a high-temperature resistant sensor, and a high-temperature resistant downhole reader.

[0021] The inner sleeve includes an installation cylinder 7, with multiple skirt-shaped rubber blocks 11 evenly distributed and fixed on the outer circumference of the installation cylinder 7. The skirt-shaped rubber blocks 11 are in contact with the inner wall of the sleeve 1. The upper end of the bladder body 8 is fixedly connected to the upper end of the installation cylinder 7, and the magnetic ring 12 is fixed to the lower end of the installation cylinder 7.

[0022] The casing 1 is lowered to the preset position in the well 6. The casing 1 is then aligned using the variable diameter centralizer 2. The installation cylinder 7 is inserted into the casing 1. The skirt-shaped rubber block 11 at the bottom of the installation cylinder 7 contacts the stop block 4, positioning the installation cylinder 7 so that it cannot move further downwards. At this time, the skirt-shaped rubber block 11 is under compression and located in the gap between the installation cylinder 7 and the casing 1. At this time, the magnetic ring 12 is located inside the magnetic signal control switch 5. After the magnetic signal control switch 5 receives the magnetic signal from the magnetic ring 12, the information detection and writing device 3 is activated. The high-temperature resistant downhole reader and high-temperature resistant sensor inside the information detection and writing device 3 are activated, and well fluid is injected into the annular cavity between the casing 1 and the well 6. After a period of time, the well fluid enters the casing 1. The fluid surges upwards, impacting the capsule 8. The remaining fluid rises through the gaps between the skirt-shaped rubber blocks 11. The capsule 8, impacted by the fluid, flips upwards and outwards. After flipping upwards, the high-temperature resistant RFID tag 10 is located outside the capsule 8 and is near the information detection and writing device 3. At this time, the high-temperature downhole reader writes the environmental information collected by multiple high-temperature sensors into the high-temperature resistant RFID tag 10. As the fluid continues to surge upwards, the connection between the capsule 8 and the mounting cylinder 7 is broken. The capsule 8 and the mounting cylinder 7 separate and move to the external ground with the fluid. Then, the external reader reads the information on the high-temperature resistant RFID tag 10.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wireless communication device for oilfield wells, comprising a casing (1), wherein an information detection and writing device (3) is fixed on the casing (1), characterized in that, Multiple blocks (4) are fixed inside the casing (1) below the information detection and writing device (3). A magnetic signal control switch (5) is fixed inside any block (4). An inner sleeve is snapped into the casing (1). The lower end of the inner sleeve is blocked by multiple blocks (4). A magnetic ring (12) for sending magnetic signals to the magnetic signal control switch (5) is fixed at the lower end of the inner sleeve. A bag-shaped capsule (8) is provided inside the inner sleeve. A counterweight (9) is fixed at the lower end of the capsule (8). The upper end of the capsule (8) is fixedly connected to the inner sleeve. A high-temperature resistant radio frequency electronic tag (10) is fixed on the inner side of the capsule (8). After the capsule (8) is flipped up, the high-temperature resistant radio frequency electronic tag (10) corresponds to the information detection and writing device (3), and the information detection and writing device (3) allows the detected well information to be written into the high-temperature resistant radio frequency electronic tag (10).

2. The oilfield downhole wireless communication device according to claim 1, characterized in that, The information detection and writing device (3) includes a high-temperature resistant battery pack, a high-temperature resistant sensor, and a high-temperature resistant downhole reader that are electrically connected.

3. The oilfield downhole wireless communication device according to claim 1 or 2, characterized in that, The inner sleeve includes an installation cylinder (7), and multiple skirt-shaped rubber blocks (11) are evenly distributed and fixed on the outer circumference of the installation cylinder (7). The skirt-shaped rubber blocks (11) are in contact with the inner wall of the sleeve (1). The upper end of the bladder (8) is fixedly connected to the upper end of the installation cylinder (7), and the magnetic ring (12) is fixed at the lower end of the installation cylinder (7).

4. The oilfield downhole wireless communication device according to claim 1 or 2, characterized in that, A variable diameter stabilizer (2) is fixed to the outside of the sleeve (1).

5. The oilfield downhole wireless communication device according to claim 1, characterized in that, The multiple stops (4) are evenly distributed around the central circumference of the sleeve (1).

6. The transmission method based on the oilfield downhole wireless communication device according to claim 1, characterized in that, The casing (1) is lowered into the preset position of the oil well (6). The casing (1) is straightened using the variable diameter stabilizer (2). The installation cylinder (7) is inserted into the casing (1). The skirt-shaped rubber block (11) at the bottom of the installation cylinder (7) contacts the stop block (4). The installation cylinder (7) is positioned and cannot move further down. At this time, the skirt-shaped rubber block (11) is in a squeezed state and is located in the gap between the installation cylinder (7) and the casing (1). At this time, the magnetic ring (12) is located inside the magnetic signal control switch (5). After the magnetic signal control switch (5) receives the magnetic signal from the magnetic ring (12), the information detection and writing device (3) is opened. The high-temperature downhole reader and high-temperature sensor in the information detection and writing device (3) are activated. Well fluid is injected into the annular cavity between the casing (1) and the oil well (6). After a period of time, the well fluid... The fluid enters the casing (1) and surges upward. Part of the surging fluid impacts the capsule (8), while the rest of the fluid surges upward through the gaps between the skirt-shaped rubber blocks (11). The capsule (8) is impacted by the fluid and flips upward. After the capsule (8) flips upward, the high-temperature resistant radio frequency electronic tag (10) is located outside the capsule (8) and is located near the information detection and writing device (3). At this time, the high-temperature downhole reader writes the environmental information collected by multiple high-temperature sensors into the high-temperature resistant radio frequency electronic tag (10). As the fluid continues to surge upward, the connection between the capsule (8) and the mounting cylinder (7) is broken. The capsule (8) and the mounting cylinder (7) separate and go to the external ground with the fluid. Then, the external reader reads the information on the high-temperature resistant radio frequency electronic tag (10).

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