CN216525525U

CN216525525U - Underground water content detection device

Info

Publication number: CN216525525U
Application number: CN202122522006.3U
Authority: CN
Inventors: 孙洁; 吴亚军; 刘二余; 黄松峰; 林孟熹
Original assignee: Jiangsu Maihe Internet Of Things Technology Co ltd
Current assignee: Jiangsu Maihe Internet Of Things Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-05-13
Anticipated expiration: 2031-10-19

Abstract

The utility model relates to a downhole water content detection device, which comprises a liquid passing cylinder with a through upper end and a through liquid passing cylinder inner ring inside the liquid passing cylinder; the sensor probe is fixed in the inner ring of the liquid passing cylinder; the sensor probe comprises a U-shaped antenna; the U-shaped antenna extends out of the lower end of the inner ring of the liquid passing cylinder, and is positioned inside the liquid passing cylinder; and a flow passage is arranged between the liquid passing cylinder and the inner ring of the liquid passing cylinder. The utility model adopts a non-collecting flow measuring mode, and has the advantages of difficult damage of the whole device, convenient maintenance and lower cost because of no parts which are easy to damage like a rapid flow umbrella.

Description

Underground water content detection device

Technical Field

The utility model relates to a detection device, in particular to a device for detecting underground water content.

Background

In crude oil exploration and exploitation, the moisture content of crude oil in an oil well needs to be measured, a moisture content logging instrument is a commonly used oil well measuring device at present, the existing moisture content logging instrument mainly comprises a capacitance method, an impedance method and the like, the structure is complex, the size is large, the length is too long, the use flexibility is poor, the detection equipment can not be reliably detected in a deep well or an inclined well in real time, the mechanical structure of the existing moisture content logging instrument is poor in sealing performance, and the instrument is very easy to damage due to the fact that oil, water and the like are immersed in the instrument.

In addition, in order to uniformly mix crude oil in a well, the crude oil flows through a probe and the fluid speed is improved, the existing water content logging instrument adopts a current-collecting structure, and the structure is characterized by comprising a current-collecting umbrella, so that the fluid is collected into a current-collecting channel, the diameter of the current-collecting channel is far smaller than the size of a sleeve, when the fluid flows into a rapid flow channel, the fluid speed is greatly improved, but the current-collecting umbrella is complex to manufacture, is easy to damage, is inconvenient to maintain and has higher cost.

In summary, the disadvantages of the prior art are as follows:

1. the detection device has the advantages of complex structure, large volume of the detection instrument, overlong length, inconvenience in transportation and installation, poor flexibility and incapability of ensuring that the instrument normally enters the oil well.

2. The detection instrument needs to extend into the underground for more than one thousand meters during working, the instrument collecting umbrella part is easy to damage, the maintenance is extremely inconvenient, and the consumed cost is higher.

3. The sealing performance is poor, and oil and water easily permeate into the instrument to cause the damage of the instrument.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model discloses a device for detecting the water content in a well.

The technical scheme adopted by the utility model is as follows:

a downhole water content detection device comprises a liquid passing cylinder with a through upper end and a through lower end and a liquid passing cylinder inner ring in the liquid passing cylinder; the sensor probe is fixed in the inner ring of the liquid passing cylinder; the sensor probe comprises a U-shaped antenna; the U-shaped antenna extends out of the lower end of the inner ring of the liquid passing cylinder, and is positioned inside the liquid passing cylinder; and a flow passage is arranged between the liquid passing cylinder and the inner ring of the liquid passing cylinder.

The further technical scheme is as follows: the liquid passing cylinder and the inner ring of the liquid passing cylinder are integrally formed.

The further technical scheme is as follows: the inner wall of the liquid passing cylinder is provided with a connecting structure parallel to the axis of the liquid passing cylinder, and the inner ring of the liquid passing cylinder and the connecting structure are integrally formed; the connecting structure, the outer wall of the inner ring of the liquid passing cylinder and the inner wall of the liquid passing cylinder enclose the flow passing channel.

The further technical scheme is as follows: a wire outlet hole is formed in the position of the connecting structure of the side wall of the liquid passing cylinder; and a coaxial signal wire of the sensor probe extends out of the detection device from the space inside the liquid passing cylinder through the wire outlet hole.

The further technical scheme is as follows: the equivalent diameter of the flow cross section of the flow channel is 18-20 mm.

The further technical scheme is as follows: a rear plug is arranged above the inner ring of the liquid passing cylinder; the side wall of the rear plug is provided with a plurality of annular rear plug sealing grooves; and a sealing ring is arranged in the sealing groove of the rear plug.

The further technical scheme is as follows: a probe sealing groove is formed in the side wall of the shell of the sensor probe; and a sealing ring is arranged in the probe sealing groove.

The further technical scheme is as follows: an isolation baffle is fixed at the lower end of the sensor probe; the U-shaped antenna comprises a parallel section and a bent section; the parallel section extends out from the lower end of the sensor probe and is positioned on two sides of the isolation baffle; the curved segment spans a lower edge of the isolation barrier.

The further technical scheme is as follows: the corners of the isolation baffle are streamline.

The further technical scheme is as follows: and the upper port and the lower port of the liquid passing cylinder are respectively provided with a rear connecting thread and a front connecting thread.

The utility model has the following beneficial effects:

1. the whole small that detecting instrument is whole, length is also short, only need guarantee sensor probe and the U type antenna on the sensor probe be located cross the liquid section of thick bamboo can, and length is shorter, light in weight, transport the convenience.

2. The utility model does not adopt structures such as a rapid flow umbrella to increase the fluid speed, the whole test adopts a non-afflux measurement mode, and the whole device is not easy to damage, convenient to maintain and low in cost because of no easily damaged parts such as the rapid flow umbrella.

3. The inner ring of the liquid passing cylinder and the liquid passing cylinder are integrated, and the structure design has good sealing performance and is not easy to leak liquid.

4. The utility model controls the equivalent diameter of the overflowing section of the overflowing channel, so that the device can normally pass through crude oil in an oil well and simultaneously ensure that fine impurities in the crude oil can also pass through the device safely. Meanwhile, the over-current square amount can be ensured to be more than or equal to 300m³And d, the crude oil in the oil well must flow through the U-shaped antenna when flowing into the liquid cylinder, so that the measurement accuracy is ensured.

5. The utility model is provided with an isolation baffle plate by matching with a detection probe such as a U-shaped antenna, thereby avoiding the coupling interference of transmission signals of the antennas at two sides. And crude oil can be effectively shunted, so that the crude oil flows through the antennas on the two sides, and the measurement accuracy is improved.

6. The utility model adopts a threaded connection mode, is convenient to install and disassemble and is easy to maintain.

Drawings

Fig. 1 is a schematic structural diagram in an embodiment of the present invention.

Fig. 2 is a bottom view of fig. 1.

In the figure: 1. a liquid passing cylinder; 2. passing through the inner ring of the liquid cylinder; 3. a rear connecting thread; 4. a rear plug; 5. a sensor probe; 6. a wire outlet hole; 7. a coaxial signal line; 8. an isolation baffle; 9. a U-shaped antenna; 10. a rear plug sealing groove; 11. a probe sealing groove; 12. front connecting threads; 13. and a flow passage.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

Fig. 1 is a schematic structural diagram in an embodiment of the present invention. As shown in fig. 1, the downhole water content detection device includes a liquid passing cylinder 1 having a through upper end and a through lower end, and a liquid passing cylinder inner ring 2 inside the liquid passing cylinder 1. The liquid passing cylinder 1 and the inner ring 2 of the liquid passing cylinder are integrally formed, so that the opening on the surface of the whole device can be reduced, and the sealing performance of the whole device is stronger.

Fig. 2 is a bottom view of fig. 1. Referring to fig. 1 and 2, the inner wall of the liquid passing cylinder 1 is provided with a connecting structure. The connecting structure is a strip protruding out of the inner wall of the liquid passing cylinder 1, and the direction of the connecting structure is parallel to the axis of the liquid passing cylinder 1. The inner ring 2 of the liquid passing cylinder is integrally formed on the connecting structure, and the connecting structure forms a part of the side wall of the inner ring 2 of the liquid passing cylinder.

And a flow passage 13 is arranged between the liquid passing cylinder 1 and the inner ring 2 of the liquid passing cylinder. The transfer channel 13 is annular. The overflowing channel 13 is enclosed by the connecting structure, the outer wall of the inner ring 2 of the liquid passing cylinder and the inner wall of the liquid passing cylinder 1. When the connecting structure protrudes out of the inner wall of the liquid passing cylinder 1, the flow passing channel 13 is formed by enclosing the side wall of the connecting structure, the outer wall of the inner ring 2 of the liquid passing cylinder and the inner wall of the liquid passing cylinder 1.

Preferably, the equivalent diameter of the flow cross section of the flow passage 13 is 18-20 mm, for example 19mm, and can be adjusted to some extent according to the installation and use conditions on site. This allows the apparatus to pass crude oil normally in the well while ensuring that fine impurities in the crude oil can pass through safely.

The sensor probe 5 is fixed in the inner ring 2 of the liquid passing cylinder. The sensor probe 5 includes a circuit structure mounting case and a U-shaped antenna 9. And a detection circuit is arranged in the circuit structure mounting box body. And a plurality of probe sealing grooves 11 are formed in the outer side wall of the circuit structure mounting box body. A seal ring is arranged in the probe seal groove 11. The circuit structure is arranged in the liquid passing cylinder inner ring 2, and the sealing ring in the probe sealing groove 11 ensures that the space between the sensor probe 5 and the liquid passing cylinder inner ring 2 is sealed. The detection circuit is connected to a U-shaped antenna 9 through a coaxial signal line 7. The U-shaped antenna 9 extends out of the lower end of the inner ring 2 of the liquid cylinder, and the U-shaped antenna 9 is positioned inside the liquid cylinder 1.

A rear plug 4 is arranged at the upper port of the inner ring 2 of the liquid passing cylinder. The side wall of the rear plug 4 is provided with a plurality of annular rear plug sealing grooves 10. And a sealing ring is arranged in the sealing groove 10 of the rear plug, and when the rear plug 4 is plugged into the inner ring 2 of the liquid passing cylinder, the sealing ring ensures that the space between the rear plug 4 and the inner ring 2 of the liquid passing cylinder is sealed. The rear plug 4 also comprises a cylinder structure supported on a sensor probe 5 at the lower end of the inner ring 2 of the liquid passing cylinder, so that a space is formed between the inner wall of the inner ring 2 of the liquid passing cylinder and the cylinder structure. And a wire outlet hole 6 is formed in the side wall of the liquid passing cylinder 1 at the position of the connecting structure. A coaxial signal wire 7 on the detection circuit passes through the space between the inner wall of the inner ring 2 of the liquid cylinder and the column structure and extends out of the wire outlet hole 6 to be connected with a structure outside the detection device. The rear plug 4 is used for facilitating installation and fixing of the sensor probe 5, and during installation, the rear plug 4 is opened to facilitate operation, so that the coaxial signal wire 7 can easily penetrate through the wire outlet hole 6 from the sensor probe 5. After the sensor probe 5 and the coaxial signal wire 7 are installed, the rear plug 4 is installed, and the sensor probe 5 is sealed in the inner ring 2 of the liquid passing cylinder.

In a further technical scheme, an isolation baffle 8 is fixed at the lower end of the sensor probe 5. For example, the isolation barrier 8 may be secured to a circular cap that covers the lower end of the sensor probe 5. The U-shaped antenna 9 includes a parallel section and a bent section. The parallel sections extend out from the lower end of the sensor probe 5 and are positioned on two sides of the isolation baffle 8. The curved segment spans the lower edge of the separation baffle 8. I.e. the isolation baffle 8 is located in the space enclosed by the U-shaped antenna 9. The isolation baffle 8 isolates signals on two sides of the U-shaped antenna 9, and coupling interference of transmission signals of the antennas on the two sides is prevented. Preferably, the corners of the isolation baffle 8 are streamline to reduce the fluid resistance to crude oil, so that crude oil can be effectively shunted, the crude oil can flow through the antennas on the two sides, and the measurement accuracy is improved.

Preferably, the U-shaped antenna 9 is made of copper material, and the surface of the U-shaped antenna is sprayed with a hydrophobic and oleophobic coating, so that the U-shaped antenna 9 has the characteristics of oil resistance, wear resistance, corrosion resistance, high temperature resistance and the like.

Further, the outer walls of the upper port and the lower port of the liquid passing cylinder 1 are respectively provided with a rear connecting thread 3 and a front connecting thread 12 for mounting and fixing the liquid passing cylinder 1.

The utility model adopts a non-current-collecting measuring mode, namely the U-shaped antenna 9 is placed in the liquid passing cylinder 1, and the structure protects the U-shaped antenna 9, so that the U-shaped antenna 9 is not easy to be scratched, and the U-shaped antenna 9 can be easily scratchedTo ensure that the over-current square amount is more than or equal to 300m³And d, crude oil in the oil well must flow through the U-shaped antenna 9 when flowing into the liquid cylinder 1, so that the measurement accuracy is ensured.

The detection circuit of the sensor probe 5 includes a signal generation module, a data processing module, a data transmission module, and the like. The signal generation module generates a microwave signal. The microwave signal is transmitted to the U-shaped antenna 9 via the coaxial line. When crude oil with different water contents flows through the water content microwave probe, the time domain characteristics of the microwave signals can be changed due to different water contents, and the U-shaped antenna 9 returns the microwave signals to the data processing module. The data processing module compares the microwave signal sent by the signal generating module with the microwave signal returned by the U-shaped antenna 9, compares time domain characteristic parameters such as phase difference of the microwave signal and the microwave signal, and judges the water content of the crude oil.

The foregoing description is illustrative of the present invention and is not to be construed as limiting the utility model, which is defined by the scope of the appended claims, as the utility model may be modified in any manner without departing from the essential structure thereof.

Claims

1. The utility model provides a moisture content detection device in pit which characterized in that: comprises a liquid passing cylinder (1) with the upper end and the lower end communicated with each other and a liquid passing cylinder inner ring (2) in the liquid passing cylinder (1); the sensor probe (5) is fixed in the inner ring (2) of the liquid passing cylinder; the sensor probe (5) comprises a U-shaped antenna (9); the U-shaped antenna (9) extends out of the lower end of the inner ring (2) of the liquid passing cylinder, and the U-shaped antenna (9) is positioned inside the liquid passing cylinder (1); and a flow passage (13) is arranged between the liquid passing cylinder (1) and the inner ring (2) of the liquid passing cylinder.

2. The downhole water cut detection device of claim 1, wherein: the liquid passing cylinder (1) and the inner ring (2) of the liquid passing cylinder are integrally formed.

3. The downhole water cut detection device of claim 2, wherein: the inner wall of the liquid passing cylinder (1) is provided with a connecting structure parallel to the axis of the liquid passing cylinder (1), and the inner ring (2) of the liquid passing cylinder and the connecting structure are integrally formed; the connecting structure, the outer wall of the inner ring (2) of the liquid passing cylinder and the inner wall of the liquid passing cylinder (1) enclose the overflowing channel (13).

4. The downhole moisture content detection apparatus of claim 3, wherein: a wire outlet hole (6) is formed in the position of the connecting structure on the side wall of the liquid passing cylinder (1); and a coaxial signal wire (7) of the sensor probe (5) extends out of the detection device from the space inside the liquid passing cylinder (1) through the wire outlet hole (6).

5. The downhole water cut detection device of claim 1, wherein: the equivalent diameter of the flow cross section of the flow passage (13) is 18-20 mm.

6. The downhole water cut detection device of claim 1, wherein: a rear plug (4) is arranged above the inner ring (2) of the liquid passing cylinder; the side wall of the rear plug (4) is provided with a plurality of annular rear plug sealing grooves (10); and a sealing ring is arranged in the sealing groove (10) of the rear plug.

7. The downhole water cut detection device of claim 1, wherein: a probe sealing groove (11) is formed in the side wall of the shell of the sensor probe (5); a sealing ring is arranged in the probe sealing groove (11).

8. The downhole water cut detection device of claim 1, wherein: an isolation baffle (8) is fixed at the lower end of the sensor probe (5); the U-shaped antenna (9) comprises a parallel section and a bent section; the parallel section extends out from the lower end of the sensor probe (5) and is positioned on two sides of the isolation baffle (8); the curved section spans the lower edge of the insulating barrier (8).

9. The downhole moisture content detection device of claim 8, wherein: the corners of the isolation baffle (8) are streamline.

10. The downhole water cut detection device of claim 1, wherein: and the upper port and the lower port of the liquid passing cylinder (1) are respectively provided with a rear connecting thread (3) and a front connecting thread (12).