CN106089186B - Segmented water injection well mouth and well bottom signal wireless transmitting and receiving device and wireless transmission method - Google Patents
Segmented water injection well mouth and well bottom signal wireless transmitting and receiving device and wireless transmission method Download PDFInfo
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- CN106089186B CN106089186B CN201610692566.4A CN201610692566A CN106089186B CN 106089186 B CN106089186 B CN 106089186B CN 201610692566 A CN201610692566 A CN 201610692566A CN 106089186 B CN106089186 B CN 106089186B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000002347 injection Methods 0.000 title claims abstract description 99
- 239000007924 injection Substances 0.000 title claims abstract description 99
- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
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Abstract
The invention discloses a wellhead and bottom signal wireless transceiver and a wireless transmission method for a sectional water injection well, which can be used in a vertical well, a highly-deviated well and a horizontal well for sectional water injection. The wireless receiving and transmitting device for the wellhead signals of the segmented water injection well mainly comprises a GPRS communication module, a wellhead device control circuit board, an infrasonic wave generator and an infrasonic wave receiver; the signal relay amplifying device mainly comprises an infrasonic wave generator, an infrasonic wave receiver and a battery pack; the wireless receiving and transmitting device for the bottom signal of the segmented water injection well mainly comprises an infrasonic wave generator, an infrasonic wave receiver and a battery pack; installing a wellhead signal wireless transceiver of the segmented water injection well on a test valve of the wellhead, and connecting a signal relay amplifying device in an oil pipe between an upper water injection layer and the wellhead; the wireless receiving and transmitting device for the bottom signal of the segmented water injection well and the wireless measurement and control water distribution device are matched and connected in the oil pipe and correspond to each water injection layer.
Description
Technical Field
The invention relates to water injection equipment of an oil field water injection well, in particular to a wellhead and bottom signal wireless transmitting and receiving device and a wireless transmission method for a sectional water injection well, which can be used in a vertical well, a highly-deviated well and a horizontal well for sectional water injection.
Background
In the process of oil field development, stratified water injection is an important means for solving the interlayer contradiction of reservoirs and implementing effective water injection. Collecting downhole data and controlling downhole equipment is a very important task, and usually several kilometers of cables are connected with downhole sensors or equipment to realize signal transmission. The existing common separate injection process needs a steel wire or a cable to carry a flowmeter or a fishing tool to carry out repeated tripping operation in the regular measuring and adjusting working process, the measuring and adjusting workload is large, the production cost is high by adopting wired transmission, and line faults are easy to occur. In a highly deviated well and a horizontal well sectional water injection project, the conventional testing and adjusting process cannot realize regular testing and adjusting work.
The commonly used wireless transmission technologies mainly include electromagnetic wave transmission technology, pulse transmission technology, optical fiber telemetry technology, acoustic wave transmission and the like. The electromagnetic wave transmission technology mainly takes the stratum as a medium for transmission, has short transmission distance and large power consumption, and is not suitable for long-term data remote transmission work in the pit. The pulse transmission has high requirements on the performance of equipment, higher cost and large power consumption. The optical fiber transmission equipment has higher requirements on working environment, is easy to have phenomena of optical cable damage and the like in complex underground environment, and is not suitable for long-distance underground data transmission. The sound wave transmission mostly uses ultrasonic waves and the like for short-distance data transmission, and is not suitable for long-distance transmission.
In order to solve a plurality of problems in the layered water injection measurement and regulation work, a wireless measurement and control water distribution device for underground segmented water injection needs to be used, so that a set of wireless transmission equipment needs to be matched with the wireless measurement and control water distribution device to realize remote control of the segmented water injection. The production field needs a wireless transceiver which can be used with a wireless measurement and control water distribution device and realize segmented water injection.
Disclosure of Invention
The invention provides a wireless transmitting and receiving device and a wireless transmission method for signals at a well head and a well bottom of a sectional water injection well, which use infrasonic waves as a long-distance information transmission carrier in a shaft to be matched with a wireless measurement and control water distribution device for use, solve the problems in the conventional layered water injection measurement and control work, achieve the purpose of adjusting the injection quantity of each layer section without tripping a pipe column, and reduce the production cost.
The technical scheme of the invention is as follows:
the wellhead signal wireless transceiver of the segmented water injection well mainly comprises a GPRS communication module, a wellhead device control circuit board, an infrasonic wave generator and an infrasonic wave receiver, wherein a wellhead device shell is provided with a local communication interface; the GPRS communication module, a wellhead device control circuit board, a battery pack, an infrasonic wave generator and an infrasonic wave receiver are installed in a wellhead device shell.
The signal relay amplifying device mainly comprises an infrasound generator, an infrasound receiver and a battery pack, wherein a circuit board of the amplifying device is connected with the battery pack through a cable, the infrasound generator and the infrasound receiver are arranged at two ends of the circuit board of the amplifying device and the battery pack, and sealing parts are arranged at two ends of the infrasound generator and the infrasound receiver; and the sealing element, the infrasonic wave generator, the infrasonic wave receiver, the amplifying device circuit board and the battery pack are arranged in an annular space between the amplifying device shell and the central pipe, and two ends of the amplifying device shell are respectively connected with the upper interface of the amplifying device and the lower interface of the amplifying device.
The bottom hole signal wireless transceiver of the segmental water injection well mainly comprises an infrasonic wave generator, an infrasonic wave receiver and a battery pack, wherein a circuit board of the bottom hole device is connected with the battery pack through a cable, and the infrasonic wave generator and the infrasonic wave receiver are arranged above the circuit board of the bottom hole device and are connected with the circuit board of the bottom hole device through the cable; and a sealing piece is arranged above the infrasonic wave generator and the infrasonic wave receiver, the infrasonic wave generator, the infrasonic wave receiver, the shaft bottom device circuit board and the battery pack are arranged in an annular cavity of a shaft bottom device shell, and the upper end of the annular cavity of the shaft bottom device shell is connected with an upper interface of the shaft bottom device.
A wireless transmitting method of a well head signal wireless transmitting and receiving device, a signal relay amplifying device and a well bottom signal wireless transmitting and receiving device of a sectional water injection well comprises the following steps:
A. installing a wellhead signal wireless transceiver of the segmented water injection well on a test valve of the wellhead, and connecting a signal relay amplifying device in an oil pipe between an upper water injection layer and the wellhead;
B. the wireless receiving and transmitting device of the bottom signal of the segmented water injection well and the wireless measurement and control water distribution device are matched and connected in the oil pipe and correspond to each water injection layer;
C. the annular space between the oil pipe and the casing is blocked and sealed between the water injection layers through a packer;
D. connecting a check valve and a screen pipe plug in an oil pipe below the bottommost water injection layer;
E. the wireless receiving and transmitting device for the signals of the well mouth of the segmented water injection well remotely transmits underground data to a background processor of a large computer through a GPRS communication module or connects a local communication interface with field mobile processing equipment and transmits the data to the field mobile processing equipment.
The invention has the following remarkable effects:
the wireless measurement and control water distribution device transmits state information to the ground through the bottom signal wireless transceiver, and ground workers make a distribution instruction according to the state information and transmit the distribution instruction to the wireless measurement and control water distribution device through the wellhead signal wireless transceiver and the bottom signal wireless transceiver, so that the purpose of distributing the distribution amount of each layer section without tripping a pipe column is achieved.
The wellhead signal wireless transceiver is arranged on a test valve of a wellhead of the layered water injection well, receives underground signals, performs filtering, amplification and other processing on the signals, remotely transmits data to a background processor of a large-scale computer or collects the data to field mobile processing equipment through a local data interface, compiles a blending instruction into an infrasonic signal and transmits the infrasonic signal to the underground, and guides the wireless measurement and control water distribution device of each water injection layer to regulate and control the water injection amount.
The bottom signal wireless transceiver is matched with the wireless measurement and control water distribution device, and one wireless measurement and control water distribution device is arranged in each water injection layer section to play a role in receiving signals of the wireless measurement and control water distribution device, convert the signals into infrasonic signals and output the infrasonic signals to a wellhead; and receiving an infrasonic wave instruction signal from the wellhead, converting the instruction signal into an electric signal, sending the electric signal to the wireless measurement and control water distribution device, and guiding the wireless measurement and control water distribution device of each water injection layer section to regulate and control the water distribution and injection amount.
The signal relay amplifying device is arranged in an oil pipe between a wellhead and a first or upper water injection layer, replaces a corresponding water injection pipe column coupling, is arranged at intervals of 400-600 m, can change the spacing distance according to the underground condition of a field, and plays a role in relay amplification of infrasonic signals. The application of the device greatly improves the transmission distance of signals, reduces the power of a single infrasonic wave generator and an infrasonic wave receiver, and prolongs the service life of the battery pack.
In order to prolong the service life of the underground battery pack, the wireless transmitting and receiving device for the signals at the bottom of the well and the wireless measurement and control water distribution device adopt two modes of regular awakening and artificial wellhead signal awakening, the underground equipment is in a dormant state in most of time, and injected water is injected into each oil layer through the wireless measurement and control water distribution device. The bottom signal wireless transceiver is used with wireless measurement and control water distribution device, and every water injection layer needs to be installed one set, and the installation cover number is decided by the number of water injection layer, uses the packer to separate oil jacket annular space between the water injection layer, realizes multistage water injection function and the remote control to the segmentation water injection well.
The invention is used with the wireless measurement and control water distribution device, on-site experiments prove that parameters such as well bottom subsection pressure, subsection water injection quantity and the like can be obtained at regular time, and a dispatching instruction is sent through a well mouth, so that the aim of dispatching the distribution injection quantity of each layer section without tripping a pipe column can be realized, and the wireless dispatching device not only can be used for a vertical well, but also realizes the wireless dispatching function of a highly deviated well and a horizontal well. The wireless measurement and control water distribution device is matched with the wireless measurement and control water distribution device to work stably, and the defects that the traditional allocation technology is large in workload and high in cost, and the traditional measurement and control technology cannot realize sectional water injection and periodic measurement and control of a highly deviated well and a horizontal well are overcome. The invention adopts two modes of regular awakening and manual wellhead signal awakening, thereby realizing the aims of low power consumption and long-time work and achieving the expected purpose. The invention has low investment cost and reliable work, greatly reduces the production cost and has obvious economic benefit and social benefit.
Drawings
FIG. 1 is a schematic view of the working state of the present invention;
FIG. 2 is a schematic structural diagram of a wellhead signal wireless transceiver;
fig. 3 is a schematic structural diagram of a signal relay amplifying device;
fig. 4 is a schematic diagram of a downhole signal transceiver.
Detailed Description
The present invention is described in detail below with reference to the attached drawings, but the present invention is not limited thereto. The following description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as applying the equivalent variations of the present invention.
Referring to fig. 2, the wellhead signal wireless transceiver of the segmented water injection well mainly comprises a GPRS communication module 13, a wellhead control circuit board 15, an infrasound generator 16 and an infrasound receiver 17, wherein a wellhead housing 12 is provided with a local communication interface 14, the GPRS communication module 13 and the local communication interface 14 are connected in parallel with the wellhead control circuit board 15 through cables, and a battery pack 18, the infrasound generator 16 and the infrasound receiver 17 are connected with the wellhead control circuit board 15 through cables; the GPRS communication module 13, wellhead control circuit board 15, battery pack 18, infrasonic generator 16 and infrasonic receiver 17 are mounted within the wellhead housing 12. The local communication interface 14 is arranged at the top of the wellhead device shell 12, a sealing cavity is arranged at the lower part of the wellhead device shell 12 and is connected with a test valve of the wellhead 3 through a slip, and the whole wellhead device shell 12 is a closed space.
Referring to fig. 3, the signal relay amplifying device mainly comprises an infrasonic wave generator 16, an infrasonic wave receiver 17 and a battery pack 18, wherein an amplifying device circuit board 21 is connected with the battery pack 18 through a cable, the infrasonic wave generator 16 and the infrasonic wave receiver 17 are arranged at two ends of the amplifying device circuit board 21 and the battery pack 18, and sealing members 20 are arranged at two ends of the infrasonic wave generator 16 and the infrasonic wave receiver 17; the sealing member 20, the infrasonic wave generator 16, the infrasonic wave receiver 17, the amplifying device circuit board 21 and the battery pack 18 are installed in an annular space between the amplifying device shell 23 and the central tube 22, and two ends of the amplifying device shell 23 are respectively connected with the amplifying device upper interface 19 and the amplifying device lower interface 24. The infrasonic wave generator 16 and the infrasonic wave receiver 17 at the two ends of the amplifying device circuit board 21 and the battery pack 18 are oppositely arranged; the outer circles of the upper interface 19 and the lower interface 24 of the amplifying device are both provided with external threads which are in threaded connection with the shell 23 of the amplifying device, one end of the inner cavity of the amplifying device is a conical cavity, the internal threads in the inner cavity are connected with the oil pipe 6, and the inner diameter of a small opening of the conical cavity is consistent with the inner diameter of the central pipe 22. The upper interface 19 of the amplifying device and the small end of the conical cavity of the lower interface 24 of the amplifying device are oppositely connected with two ends of the shell 23 of the amplifying device.
Referring to fig. 4, the wireless transceiver for the bottom hole signal of the segmented water injection well mainly comprises an infrasonic wave generator 16, an infrasonic wave receiver 17 and a battery pack 18, wherein a circuit board 26 of the bottom hole device is connected with the battery pack 18 through a cable, and the infrasonic wave generator 16 and the infrasonic wave receiver 17 are arranged above the circuit board 26 of the bottom hole device and are connected with the circuit board 26 of the bottom hole device through a cable; a seal 20 is installed above the infrasonic generator 16 and the infrasonic receiver 17, the infrasonic generator 16, the infrasonic receiver 17, the bottomhole assembly circuit board 26, and the battery pack 18 are installed in an annular cavity of a bottomhole assembly housing 27, and a bottomhole assembly upper interface 25 is connected to an upper end of the annular cavity of the bottomhole assembly housing 27. The bottom of the annular cavity of the casing 27 of the shaft bottom device is blocked, and the outer wall of the upper part of the annular cavity is provided with internal threads which are connected with an upper connector 25 of the shaft bottom device; the lower cavity of the shaft bottom device shell 27 is provided with a conical transition cavity, the caliber of the upper end port of the conical transition cavity is consistent with the inner diameter of the central hole of the shaft bottom device shell 27, the caliber of the lower end port is smaller than that of the lower end cavity, and the lower end cavity is provided with internal threads which are in threaded connection with the wireless measurement and control water distribution device 8. The internal diameter of the central bore of the bottom hole assembly housing 27 corresponds to the internal diameter of the tubing 6; the inner circle of the upper part of the upper connector 25 of the shaft bottom device is provided with internal threads which are connected with the oil pipe 6.
Referring to fig. 1, a wireless transmission method of a segmented water injection well wellhead signal wireless transceiver, a signal relay amplifier and a segmented water injection well bottom signal wireless transceiver is as follows:
A. installing a wellhead signal wireless transceiver 2 of the segmented water injection well on a test valve of a wellhead 3, and connecting a signal relay amplifier 5 in an oil pipe 6 between an upper water injection layer and the wellhead 3;
B. a wireless receiving and transmitting device 7 for a bottom signal of the segmented water injection well and a wireless measurement and control water distribution device 8 are connected in an oil pipe 6 in a matched mode and correspond to each water injection layer;
C. an annular space between the oil pipe 6 and the casing 4 is clamped and sealed between the water injection layers through a packer 9;
D. a check valve 10 and a screen pipe plug 11 are connected in the oil pipe 6 below the bottommost water injection layer;
E. the wireless receiving and transmitting device 2 for the signals of the wellhead of the segmented water injection well remotely transmits the underground data to a background processor of a large computer through the GPRS communication module 13 or connects the local communication interface 14 with the on-site mobile processing equipment 1 and transmits the data to the on-site mobile processing equipment 1.
The signal relay amplifying devices 5 connected in the oil pipe 6 are connected one by one at intervals of 400-600 m; the signal relay amplifying device 5, the segmented water injection well bottom signal wireless transceiver 7 and the wireless measurement and control water distribution device 8 can replace tubing coupling to be connected in the tubing 6; the central pipe 22 of the signal relay amplifying device 5, the central hole of the segmented water injection well bottom signal wireless transceiver 7, the inner pipe of the wireless measurement and control water distribution device 8 and the oil pipe 6 are used as a water injection channel together.
The segmented water injection well wellhead signal wireless transceiver 2, the signal relay amplifying device 5, the segmented water injection well bottom signal wireless transceiver 7 and the wireless measurement and control water distribution device 8 are periodically started by a background processor of a large-scale computer or on-site mobile processing equipment 1, and can also be manually started through the segmented water injection well wellhead signal wireless transceiver 2 installed on the wellhead 3.
The working principle of the wireless transmission of the invention is as follows:
the connection is established with the GPRS communication module 13 through control software in a large computer background processor, or the connection is established with the local communication interface 14 by using the field mobile processing equipment 1 or a portable computer on site, and a data collection instruction is sent to the segmented water injection well wellhead signal wireless transceiver 2. The segmented water injection well wellhead signal wireless transceiver 2 compiles the instruction into an infrasonic signal, and transmits the infrasonic signal to the segmented water injection well bottom signal wireless transceiver 7 through the signal relay amplification devices 5. The bottom signal wireless transceiver 7 of the segmental water injection well converts the infrasonic wave signal into an electric signal and transmits the electric signal to the wireless measurement and control water distribution device 8.
The wireless measurement and control water distribution device 8 sends state information to the segmented water injection well bottom signal wireless transceiver 7 after receiving the signals, the segmented water injection well bottom signal wireless transceiver 7 converts the information into infrasonic signals, and the infrasonic signals are transmitted to the segmented water injection well mouth signal wireless transceiver 2 through the signal relay amplification devices 5. The wellhead signal wireless transceiver 2 of the sectional water injection well transmits signals to a background processor or an on-site mobile processing device 1.
And the background processor or the field mobile processing equipment 1 issues a deployment instruction according to the feedback state information. The allocation instruction is transmitted to a wireless measurement and control water distribution device 8 through a sectional water injection well mouth signal wireless transmitting and receiving device 2, a plurality of signal relay amplifying devices 5 and a sectional water injection well bottom signal wireless transmitting and receiving device 7 in sequence, and the wireless measurement and control water distribution device 8 automatically and repeatedly adjusts according to the allocation instruction until the allocation quantity of a water injection layer appointed by the allocation instruction is close.
And after the wireless measurement and control water distribution device 8 finishes allocation, the wireless receiving and transmitting device 7 sends allocated state information to the bottom signal of the segmented water injection well. The information is transmitted to a background processor or an on-site mobile processing device 1 through a segmented water injection well bottom signal wireless transceiver 7, a plurality of signal relay amplification devices 5 and a segmented water injection well mouth signal wireless transceiver 2 in sequence. And the staff judges whether the allocation is in place or not according to the state information.
The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.
Claims (3)
1. A wireless transmission method is applied to a segmented water injection well bottom signal wireless transceiver, a signal relay amplifier and the segmented water injection well bottom signal wireless transceiver and is characterized in that the segmented water injection well head signal wireless transceiver mainly comprises a GPRS communication module (13), a well head device control circuit board (15), an infrasound wave generator (16) and an infrasound wave receiver (17), a well head device shell (12) is provided with a local communication interface (14), the GPRS communication module (13) and the local communication interface (14) are connected with the well head device control circuit board (15) in parallel through cables, and a battery pack (18), the infrasound wave generator (16) and the infrasound wave receiver (17) are connected with the well head device control circuit board (15) through cables; installing a GPRS communication module (13), a wellhead device control circuit board (15), a battery pack (18), an infrasonic wave generator (16) and an infrasonic wave receiver (17) in a wellhead device shell (12); the signal relay amplifying device mainly comprises an infrasound wave generator (16), an infrasound wave receiver (17) and a battery pack (18), wherein an amplifying device circuit board (21) is connected with the battery pack (18) through a cable, the infrasound wave generator (16) and the infrasound wave receiver (17) are arranged at two ends of the amplifying device circuit board (21) and the battery pack (18), and sealing parts (20) are arranged at two ends of the infrasound wave generator (16) and the infrasound wave receiver (17); installing a sealing element (20), an infrasonic wave generator (16), an infrasonic wave receiver (17), an amplifying device circuit board (21) and a battery pack (18) in an annular space between an amplifying device shell (23) and a central pipe (22), wherein two ends of the amplifying device shell (23) are respectively connected with an amplifying device upper interface (19) and an amplifying device lower interface (24); the segmented water injection well bottom signal wireless transceiver mainly comprises an infrasonic wave generator (16), an infrasonic wave receiver (17) and a battery pack (18), wherein a bottom device circuit board (26) is connected with the battery pack (18) through a cable, and the infrasonic wave generator (16) and the infrasonic wave receiver (17) are arranged above the bottom device circuit board (26) and are connected with the bottom device circuit board (26) through the cable; installing a sealing piece (20) above the infrasonic wave generator (16) and the infrasonic wave receiver (17), installing the infrasonic wave generator (16), the infrasonic wave receiver (17), a shaft bottom device circuit board (26) and a battery pack (18) in an annular cavity of a shaft bottom device shell (27), and connecting a shaft bottom device upper interface (25) at the upper end of the annular cavity of the shaft bottom device shell (27); the wireless transmission method comprises the following steps: A. installing a wellhead signal wireless transceiver (2) of the segmented water injection well on a test valve of a wellhead (3), and connecting a signal relay amplifier (5) in an oil pipe (6) between an upper water injection layer and the wellhead (3); B. a wireless receiving and transmitting device (7) for a bottom signal of the segmented water injection well and a wireless measurement and control water distribution device (8) are matched and connected in an oil pipe (6) and correspond to each water injection layer; C. an annular space between the oil pipe (6) and the casing (4) is clamped and sealed between the water injection layers through a packer (9); D. a check valve (10) and a sieve tube plug (11) are connected in an oil pipe (6) below the bottommost water injection layer; E. the wireless receiving and transmitting device (2) for the wellhead signals of the segmented water injection well remotely transmits underground data to a background processor of a large computer through a GPRS communication module (13) or connects a local communication interface (14) with the field mobile processing equipment (1) and transmits the underground data to the field mobile processing equipment (1).
2. A wireless transmission method according to claim 1, characterized in that the signal relay amplifying devices (5) connected in the oil pipe (6) are connected one by one every 400-600 m; the signal relay amplifying device (5), the segmented water injection well bottom signal wireless transceiver device (7) and the wireless measurement and control water distribution device (8) can replace an oil pipe coupling to be connected in an oil pipe (6); a central pipe (22) of the signal relay amplifying device (5), a central hole of the segmented water injection well bottom signal wireless transceiver (7), an inner pipe of the wireless measurement and control water distribution device (8) and an oil pipe (6) are used as water injection channels.
3. The wireless transmission method according to claim 2, wherein the segmented water injection well wellhead signal wireless transceiver (2), the signal relay amplifier (5), the segmented water injection well bottom signal wireless transceiver (7) and the wireless measurement and control water distribution device (8) are periodically started by a background processor of a large computer or an on-site mobile processing device (1), and can also be manually started by the segmented water injection well wellhead signal wireless transceiver (2) installed on the wellhead (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610692566.4A CN106089186B (en) | 2016-08-21 | 2016-08-21 | Segmented water injection well mouth and well bottom signal wireless transmitting and receiving device and wireless transmission method |
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| CN201610692566.4A CN106089186B (en) | 2016-08-21 | 2016-08-21 | Segmented water injection well mouth and well bottom signal wireless transmitting and receiving device and wireless transmission method |
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| CN106089186B true CN106089186B (en) | 2023-03-24 |
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| CN111852419A (en) * | 2019-04-26 | 2020-10-30 | 中国石油天然气股份有限公司 | Separate-layer water injection pipe column, starting pressure determining method and device and cable testing and adjusting system |
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