Continuous dynamic liquid level monitoring device

Abstract

The present invention discloses a continuous dynamic liquid level monitoring device, comprising: a shell, a base, a sound sensor, a solenoid valve assembly and an integrated circuit board; an oil pipe interface is provided at one end of the shell; the base is placed on the shell and divides the interior of the shell into two chambers, wherein the chamber close to the oil pipe interface is the first chamber, and the chamber away from the oil pipe interface is the second chamber, an air inlet channel and an air outlet channel are provided in the base, one end of the air inlet channel is connected to the first chamber, and one end of the air outlet channel is connected to the outside of the shell; the sound sensor is placed in the first chamber; the solenoid valve assembly is placed in the second chamber, and is used to connect or disconnect the air inlet channel and the air outlet channel; the integrated circuit board is electrically connected to the sound sensor and the solenoid valve assembly respectively. The present invention has good integrity, simple and compact structure, high integration and small size.

Description

Technical Field

[0001] The invention relates to the technical field of oil well dynamic liquid level measurement, and in particular to a continuous dynamic liquid level monitoring device. Background Art

[0002] In the oil field production process, the dynamic liquid level between the oil pipe and the casing is an important indicator reflecting the liquid supply capacity of the formation. It is an important basis for determining the reasonable submergence of the oil pump and formulating a reasonable working system in oil production. By monitoring and analyzing the dynamic liquid level of the oil well, the pump depth of the oil well can be directly determined, the bottom hole fluid pressure and static pressure can be calculated, and the matching situation between the oil well production working system and the formation energy can be judged, thereby improving the working efficiency of the oil well and ensuring the stable production of the oil well.

[0003] The working principle of the existing dynamic liquid level monitoring device is: once the monitoring device receives an instruction or reaches the set time, it starts the solenoid valve to release air according to the set parameters to generate infrasound as the measurement infrasound source. When encountering casing couplings and liquid level obstacles, infrasound echoes are generated. The echoes are received and collected by the echo detection circuit and the data is encoded and compressed and stored in the storage chip. After the measurement is completed, the data sending program is started, and the compressed data together with the casing pressure, wellhead temperature and related parameters of the equipment itself are sent to the remote monitoring center through the GPRS network. The monitoring center decompresses the received data and analyzes and processes it to obtain data such as the liquid level height of the oil well.

[0004] At present, most dynamic liquid level monitoring devices use a structure in which a finished solenoid valve purchased on the market is connected in series between the air inlet and the air outlet (for details, please refer to Chinese invention patent CN202215233U). The integrity, compactness and integration of the structure are relatively poor, and the volume is relatively large. In addition, the lowest temperature resistance index of the solenoid valve can only reach -20℃. Since it is installed at the wellhead of the oil well, there is a lot of water vapor and humidity, which greatly reduces the temperature index of -20℃. As a result, the low temperature index of the product is limited by this shortcoming. In the northern winter, the working state of the product is greatly affected by the water vapor and humidity of the well conditions. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a continuous dynamic liquid level monitoring device with good integrity, simple and compact structure, high integration and small size.

[0006] The present invention provides a continuous dynamic liquid level monitoring device, comprising: a shell, one end of which is provided with an oil pipe interface; a base, the base is placed in the shell and divides the interior of the shell into two chambers, wherein the chamber close to the oil pipe interface is a first chamber, and the chamber away from the oil pipe interface is a second chamber, an air inlet channel and an air outlet channel are provided in the base, one end of the air inlet channel is connected to the first chamber, and one end of the air outlet channel is connected to the outside of the shell; a sound sensor, the sound sensor is placed in the first chamber; a solenoid valve assembly, the solenoid valve assembly is placed in the second chamber, and is used to connect or disconnect the air inlet channel and the air outlet channel; and an integrated circuit board, the integrated circuit board is electrically connected to the sound sensor and the solenoid valve assembly respectively.

[0007] Furthermore, a groove is provided on one side of the base close to the second chamber; the air inlet channel and the air outlet channel are respectively connected to the groove; the solenoid valve assembly includes a valve body and a valve core arranged in the valve body, the valve body is sealed and connected to the base outside the groove, the valve core extends into the groove, and can move forward and backward under the drive of the valve body to block or open the air inlet channel or the air outlet channel.

[0008] Furthermore, a fixed iron core is provided in the valve body, a coil is wound outside the valve body, a spring is provided between the valve core and the fixed iron core, and the spring is used to provide a pre-tightening force for the valve core to press against the interface of the air inlet channel or the air outlet channel.

[0009] Furthermore, a convex edge is arranged on the outer periphery of one end of the valve body close to the base, and a pressing ring for pressing the convex edge onto the base is sleeved thereon, and the pressing ring is fixed to the base by screws.

[0010] Furthermore, the base is provided with a pressure relief hole at both ends of which are respectively connected to the air inlet passage and the outside of the shell, and a pressure relief screw is provided in the pressure relief hole.

[0011] Furthermore, it also includes a battery assembly, and the battery assembly is electrically connected to the integrated circuit board.

[0012] Furthermore, the shell includes an oil pipe joint, an outer cylinder and a rear cover; the oil pipe joint and the outer cylinder are respectively sleeved and fixed on the two ends of the base, the oil pipe interface is arranged at the end of the oil pipe joint away from the base, the solenoid valve assembly is arranged outside the outer cylinder, the rear cover is arranged at the end of the outer cylinder away from the base, and the battery assembly is arranged in the rear cover.

[0013] Furthermore, a mounting groove is provided on one side of the base close to the first chamber, a base is embedded in the mounting groove, and the sound sensor is installed on the base.

[0014] Furthermore, a pressure sensor is installed on the base, and the pressure sensor is electrically connected to the integrated circuit board.

[0015] Furthermore, an electric heating rod is arranged on the inner side of the shell surrounding the solenoid valve assembly, and the electric heating rod is electrically connected to the integrated circuit board.

[0016] The beneficial effects of the present invention are embodied in:

[0017] The oil pipe interface of the above-mentioned continuous dynamic liquid level monitoring device is connected to the oil well casing. When working, the solenoid valve assembly keeps the air inlet channel and the air outlet channel normally closed. When a momentary pulse is provided to the solenoid valve assembly, the solenoid valve assembly works, the air inlet channel and the air outlet channel are connected, and the pressurized gas in the oil well casing is released to the outside, generating sound waves. The sound waves are transmitted into the casing, and when they encounter casing couplings and liquid surface obstacles, they are reflected back. The sound sensor receives the returned sound waves, and the integrated circuit board calculates the liquid level depth of the oil well by collecting the return time of the sound waves.

[0018] The present application sets a base inside the shell, and the base divides the interior of the shell into two chambers, in which a sound sensor is installed and connected to the oil well casing, and the solenoid valve assembly is installed in the other chamber. At the same time, the air inlet channel and the air outlet channel are integrated on a base, and the solenoid valve assembly is used to control the opening and closing of the air inlet channel and the air outlet channel. Compared with the prior art that uses a commercially available finished solenoid valve in series between the air inlet and the air outlet, the present application has better integrity, simple and compact structure, high degree of integration, and smaller size. At the same time, its air path structure is simpler, with fewer sealing points and high working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0021] In the accompanying drawings, 10-shell; 11-oil pipe interface; 12-first chamber; 13-second chamber; 14-oil pipe joint; 15-outer tube; 16-rear cover; 20-base; 21-inlet channel; 22-outlet channel; 23-groove; 24-pressure relief hole; 25-pressure relief screw; 26-mounting slot; 27-base; 30-sound sensor; 40-solenoid valve assembly; 41-valve body; 411-convex edge; 412-pressure ring; 42-valve core; 43-fixed iron core; 44-coil; 45-spring; 50-integrated circuit board; 60-battery assembly; 70-pressure sensor; 80-electric heating rod. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0023] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a continuous dynamic liquid level monitoring device, including a housing 10 , a base 20 , a sound sensor 30 , a solenoid valve assembly 40 and an integrated circuit board 50 .

[0025] An oil pipe interface 11 is provided at one end of the shell 10, and a base 20 is placed on the shell 10 and divides the interior of the shell 10 into two chambers, wherein the chamber close to the oil pipe interface 11 is a first chamber 12, and the chamber away from the oil pipe interface 11 is a second chamber 13, and an air inlet channel 21 and an air outlet channel 22 are provided in the base 20, one end of the air inlet channel 21 is connected to the first chamber 12, and one end of the air outlet channel 22 is connected to the outside of the shell 10.

[0026] The sound sensor 30 is placed in the first chamber 12, and the solenoid valve assembly 40 is placed in the second chamber 13, for connecting or disconnecting the air inlet passage 21 and the air outlet passage 22. The integrated circuit board 50 is electrically connected to the sound sensor 30 and the solenoid valve assembly 40 respectively.

[0027] A groove 23 is provided on one side of the base 20 close to the second chamber 13, and the air inlet channel 21 and the air outlet channel 22 are respectively connected to the groove 23. The solenoid valve assembly 40 includes a valve body 41 and a valve core 42 provided in the valve body 41. The valve body 41 is sealed and connected to the base 20 outside the groove 23. The valve core 42 extends into the groove 23 and can move forward and backward under the drive of the valve body 41 to block or open the air inlet channel 21 or the air outlet channel 22. Specifically, a fixed iron core 43 is provided in the valve body 41, and a coil 44 is wound around the outside of the valve body 41. A spring 45 is provided between the valve core 42 and the fixed iron core 43. The spring 45 is used to provide a pre-tightening force for the valve core 42 to press against the interface of the air inlet channel 21 or the air outlet channel 22.

[0028] Under normal circumstances, the solenoid valve assembly 40 keeps the air inlet channel 21 and the air outlet channel 22 normally closed. When a momentary pulse is provided to the coil 44 of the solenoid valve assembly 40, the fixed iron core 43 is attracted to the valve core 42, and the air inlet channel 21 and the air outlet channel 22 are connected to release air. After the coil 44 is powered off, the spring 45 drives the valve core 42 to press against the interface to block the air inlet channel 21 or the air outlet channel 22, thereby cutting off the air inlet channel 21 and the air outlet channel 22. Its structure is simple and compact, and the control is reliable.

[0029] A seal needs to be formed between the valve body 41 and the base 20. In order to facilitate the installation of the valve body 41 on the base 20, a flange 411 is provided on the outer periphery of one end of the valve body 41 close to the base 20, and a pressure ring 412 is provided to press the flange 411 onto the base 20. The pressure ring 412 is fixed to the base 20 by screws. In order to improve the sealing between the valve body 41 and the base 20, an O-ring may also be provided between the flange 411 and the base 20.

[0030] The oil pipe interface 11 of the above-mentioned continuous dynamic liquid level monitoring device is connected to the oil well casing. When working, the solenoid valve assembly 40 keeps the air inlet channel 21 and the air outlet channel 22 normally closed. When a momentary pulse is provided to the solenoid valve assembly 40, the solenoid valve assembly 40 works, the air inlet channel 21 and the air outlet channel 22 are connected, and the pressurized gas in the oil well casing is released to the outside to generate sound waves. The sound waves are transmitted into the casing and are reflected back when they encounter casing couplings and liquid surface obstacles. The sound sensor 30 receives the returned sound waves, and the integrated circuit board 50 calculates the liquid level depth of the oil well by collecting the return time of the sound waves.

[0031] The present application sets a base 20 in the shell 10, and the base 20 divides the interior of the shell 10 into two chambers, wherein a sound sensor 30 is installed in one chamber and connected to the oil well casing, and a solenoid valve assembly 40 is installed in the other chamber. At the same time, the air inlet channel 21 and the air outlet channel 22 are integrated on a base 20, and the solenoid valve assembly 40 is used to control the opening and closing of the air inlet channel 21 and the air outlet channel 22. Compared with the prior art structure in which a finished solenoid valve on the market is connected in series between the air inlet and the air outlet, the present application has better integrity, simple and compact structure, high degree of integration, and smaller size. At the same time, its air path structure is simpler, with fewer sealing points and high working stability.

[0032] In one embodiment, the base 20 is also provided with a pressure relief hole 24 whose two ends are connected to the air inlet channel 21 and the outside of the shell 10 respectively. A pressure relief screw 25 is provided in the pressure relief hole 24, so that the gas in the air inlet channel 21 can be depressurized by loosening or tightening the pressure relief screw 25.

[0033] The present embodiment also includes a battery assembly 60, which is electrically connected to the integrated circuit board 50, so as to power the entire monitoring device through the battery assembly 60. The battery assembly 60 here can be a solar cell assembly 60. Of course, in other embodiments, the monitoring device can also be connected to an external power source.

[0034] In one embodiment, for easy assembly, the housing 10 includes a tubing connector 14, an outer cylinder 15, and a rear cover 16; the tubing connector 14 and the outer cylinder 15 are respectively sleeved and fixed at both ends of the base 20, the tubing interface 11 is provided at one end of the tubing connector 14 away from the base 20, the solenoid valve assembly 40 is provided outside the outer cylinder 15, the rear cover 16 is provided at one end of the outer cylinder 15 away from the base 20, and the battery assembly 60 is provided inside the rear cover 16. In order to improve the sealing of the connection between the components, O-rings are provided between the base 20 and the tubing connector 14 and the outer cylinder 15, and between the rear cover 16 and the outer cylinder 15.

[0035] In one embodiment, a mounting groove 26 is provided on one side of the base 20 close to the first chamber 12, a base 27 is embedded in the mounting groove 26, and the sound sensor 30 is installed on the base 27. In addition, a pressure sensor 70 is also installed on the base 27, and the pressure sensor 70 is electrically connected to the integrated circuit board 50. The pressure sensor 70 is used to detect the air pressure in the oil well casing.

[0036] In one embodiment, an electric heating rod 80 is provided on the inner side of the shell 10 surrounding the solenoid valve assembly 40. The electric heating rod 80 is electrically connected to the integrated circuit board 50. When the temperature is lower than -5°C, the integrated circuit board 50 controls the electric heating rod 80 to operate and heat the solenoid valve assembly 40 so that it can adapt to extremely cold weather. The overall operating temperature range of the product can reach -40 degrees.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A continuous dynamic liquid level monitoring device, characterized in that: include: A housing, one end of which is provided with an oil pipe interface; A base, the base is placed on the shell and divides the interior of the shell into two chambers, wherein the chamber close to the oil pipe interface is the first chamber, and the chamber away from the oil pipe interface is the second chamber, an air inlet channel and an air outlet channel are arranged in the base, one end of the air inlet channel is connected to the first chamber, and one end of the air outlet channel is connected to the outside of the shell; a sound sensor, the sound sensor being placed in the first chamber; a solenoid valve assembly, the solenoid valve assembly being disposed in the second chamber and being used for connecting or disconnecting the air inlet passage and the air outlet passage; and An integrated circuit board, wherein the integrated circuit board is electrically connected to the sound sensor and the solenoid valve assembly respectively; A groove is provided on one side of the base close to the second chamber; The air inlet channel and the air outlet channel are respectively connected to the groove; The solenoid valve assembly includes a valve body and a valve core arranged in the valve body. The valve body is sealed and connected to a base outside the groove. The valve core extends into the groove and can move forward and backward under the drive of the valve body to block or open the air inlet channel or the air outlet channel.

2. The continuous dynamic liquid level monitoring device according to claim 1, characterized in that: A fixed iron core is arranged inside the valve body, a coil is wound around the valve body, a spring is arranged between the valve core and the fixed iron core, and the spring is used to provide a pre-tightening force for the valve core to press against the interface of the air inlet channel or the air outlet channel.

3. The continuous dynamic liquid level monitoring device according to claim 2, characterized in that: A convex edge is arranged on the outer periphery of one end of the valve body close to the base, and a pressing ring for pressing the convex edge onto the base is sleeved thereon, and the pressing ring is fixed to the base by screws.

4. The continuous dynamic liquid level monitoring device according to claim 1, characterized in that: The base is also provided with a pressure relief hole with two ends respectively connected to the air inlet passage and the outside of the shell, and a pressure relief screw is arranged in the pressure relief hole.

5. The continuous dynamic liquid level monitoring device according to claim 1, characterized in that: It also includes a battery assembly, which is electrically connected to the integrated circuit board.

6. The continuous dynamic liquid level monitoring device according to claim 5, characterized in that: The housing comprises an oil pipe joint, an outer cylinder and a rear cover; The oil pipe joint and the outer tube are respectively sleeved and fixed on the two ends of the base, the oil pipe interface is arranged at the end of the oil pipe joint away from the base, the solenoid valve assembly is arranged outside the outer tube, the rear cover is arranged at the end of the outer tube away from the base, and the battery assembly is arranged in the rear cover.

7. The continuous dynamic liquid level monitoring device according to claim 1, characterized in that: A mounting groove is provided on one side of the base close to the first chamber, a base is embedded in the mounting groove, and the sound sensor is mounted on the base.

8. The continuous dynamic liquid level monitoring device according to claim 7, characterized in that: A pressure sensor is also installed on the base, and the pressure sensor is electrically connected to the integrated circuit board.

9. The continuous dynamic liquid level monitoring device according to claim 1, characterized in that: An electric heating rod is arranged on the inner side of the shell surrounding the solenoid valve assembly, and the electric heating rod is electrically connected to the integrated circuit board.

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