An explosion-proof oil well liquid level dynamic monitor

Abstract

The present invention proposes an explosion-proof oil well liquid level dynamic monitor, including: a measurement and control terminal, a power supply, a pressure-stabilizing tank, a pressure transmitter, an exhaust pipe and a shell. The inlet of the pressure-stabilizing tank is connected to the oil well casing, a microphone is installed in the pressure-stabilizing tank, and the microphone is connected to the measurement and control terminal signal; the pressure transmitter is connected to one of the outlets of the pressure-stabilizing tank, and the pressure transmitter is connected to the signal of the measurement and control terminal; the exhaust pipe is connected to the other outlet of the pressure transmitter, and a solenoid valve is connected to the exhaust pipe; the measurement and control terminal, the power supply, the pressure-stabilizing tank and the pressure transmitter are all arranged in the shell, and a first explosion-proof joint is arranged on the shell, and the inlet of the pressure-stabilizing tank is connected to the outside of the shell through the first explosion-proof joint. The explosion-proof oil well liquid level dynamic monitor of the present invention cancels the air pump, reduces the instrument cost, simplifies the monitoring process, and adopts an explosion-proof structure to meet the explosion-proof requirements of electrical appliances in oil production sites.

Description

Technical Field

[0001] The invention belongs to the field of oil well detection, and in particular relates to an explosion-proof oil well liquid level dynamic monitoring instrument. Background Art

[0002] The oil well liquid level dynamic monitor currently used is used at the oil wellhead, but it does not adopt an explosion-proof structure, does not meet the explosion-proof requirements for electrical appliances at oil production sites, and poses a safety hazard. In addition, an air pump device is used internally as a sound wave generating device, which makes the structure complicated. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an explosion-proof oil well liquid level dynamic monitor for overcoming the above problems or at least partially solving or alleviating the above problems.

[0004] The present invention provides an explosion-proof oil well liquid level dynamic monitoring instrument, comprising:

[0005] Measurement and control terminals and power supply;

[0006] A pressure stabilizing tank, wherein the pressure stabilizing tank has an inlet and two outlets, the inlet of the pressure stabilizing tank is directly or indirectly connected to the oil well casing, a microphone is installed in the pressure stabilizing tank, and the microphone is connected to the measurement and control terminal signal;

[0007] A pressure transmitter, the pressure transmitter is connected to one of the outlets of the pressure regulating tank, and the pressure transmitter is connected to the measurement and control terminal signal;

[0008] An exhaust pipe, the exhaust pipe is connected to another outlet of the pressure-surge tank, and the exhaust pipe is connected to a solenoid valve;

[0009] The measurement and control terminal, the power supply, the pressure-stabilizing tank and the pressure transmitter are all arranged in the shell. The shell is provided with a first explosion-proof joint, and the inlet of the pressure-stabilizing tank is connected to the outside of the shell through the first explosion-proof joint.

[0010] The present invention also has the following optional features.

[0011] Optionally, a connecting sleeve and a pressure cover are connected to the inlet of the pressure-stabilizing tank, the pressure cover is located on the inner side of the shell, the first explosion-proof joint includes an explosion-proof interface, a round nut and a stuffing box are arranged in the explosion-proof interface, a pipe plug is connected to the port of the explosion-proof interface, and the connecting sleeve passes through the round nut, the stuffing box and the pipe plug and then passes out of the shell.

[0012] Optionally, the outer end of the connecting sleeve is connected to a ball valve and a tee in sequence.

[0013] Optionally, a second explosion-proof joint is provided on the shell, the second explosion-proof joint includes an explosion-proof interface, a stuffing box and a pipe plug are provided in the explosion-proof interface, the exhaust pipe passes through the stuffing box and the pipe plug to exit the shell, and the outer port of the exhaust pipe is also connected to an elbow.

[0014] Optionally, it also includes an antenna, which is connected to the signal output end of the measurement and control terminal through a signal line; the antenna extends out of the shell.

[0015] Optionally, a third explosion-proof joint is provided on the shell, and the third explosion-proof joint includes an explosion-proof interface, and a fixing seat, a stuffing box and a pipe plug are provided in the explosion-proof interface. The antenna is connected to the fixing seat and extends out of the shell through the stuffing box and the pipe plug.

[0016] Optionally, a fourth explosion-proof joint is also provided on the shell, and the fourth explosion-proof joint includes an explosion-proof interface, and the explosion-proof interface is provided with a stuffing box, an inner square pipe plug and an explosion-proof socket from the inside to the outside. The explosion-proof socket is connected to a cable, and the cable passes through the inner square pipe plug and the stuffing box into the shell, and is connected to the measurement and control terminal and the power supply.

[0017] Optionally, a support frame is connected to the outside of the shell.

[0018] The explosion-proof oil well liquid level dynamic monitor of the present invention can directly use high-pressure casing gas to measure the oil well liquid level for wells with high casing pressure, eliminating the air pump, reducing the instrument cost, simplifying the monitoring process, and adopting an explosion-proof structure to meet the explosion-proof requirements of electrical appliances in oil production sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the explosion-proof oil well liquid level dynamic monitor of the present invention;

[0020] Figure 2 yes Figure 1 Side view of

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure of the first explosion-proof joint;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the second explosion-proof joint;

[0023] Figure 5 yes Figure 1 A schematic diagram of the structure of the third explosion-proof joint;

[0024] Figure 6 yes Figure 1Schematic diagram of the structure of the fourth explosion-proof joint.

[0025] In the above figure: 1 measurement and control terminal; 2 power supply; 3 pressure regulating tank; 4 pressure transmitter; 5 exhaust pipe; 6 solenoid valve; 7 antenna; 701 signal line; 8 shell; 9 first explosion-proof joint; 10 connecting sleeve; 11 pressure cover; 12 round nut; 13 stuffing box; 14 pipe plug; 15 ball valve; 16 tee; 17 second explosion-proof joint; 18 elbow; 19 third explosion-proof joint; 20 fixing seat; 21 fourth explosion-proof joint; 22 explosion-proof socket; 23 inner square pipe plug; 24 cable; 25 support frame; 26 explosion-proof interface.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0027] Example 1

[0028] refer to Figure 1 , Figure 2 and Figure 3 The embodiment of the present invention proposes an explosion-proof oil well liquid level dynamic monitor, including: a measurement and control terminal 1, a power supply 2, a pressure-stabilizing tank 3, a pressure transmitter 4, an exhaust pipe 5 and a shell 8; the pressure-stabilizing tank 3 has an inlet and two outlets, the inlet of the pressure-stabilizing tank 3 is directly or indirectly connected to the oil well casing, a microphone is installed in the pressure-stabilizing tank 3, and the microphone is connected to the measurement and control terminal 1 signal; the pressure transmitter 4 is connected to one of the outlets of the pressure-stabilizing tank 3, and the pressure transmitter 4 is connected to the measurement and control terminal 1 signal; the exhaust pipe 5 is connected to the other outlet of the pressure-stabilizing tank 3, and the exhaust pipe 5 is connected to a solenoid valve 6; the measurement and control terminal 1, the power supply 2, the pressure-stabilizing tank 3 and the pressure transmitter 4 are all arranged in the shell 8, and the shell 8 is provided with a first explosion-proof joint 9, and the inlet of the pressure-stabilizing tank 3 is connected to the outside of the shell 8 through the first explosion-proof joint 9.

[0029] The measurement and control terminal 1, the power supply 2 and the pressure-stabilizing tank 3 are all fixed in the housing 8. The inlet of the pressure-stabilizing tank 3 extends out of the first explosion-proof joint 9 on the housing 8 and is connected to the pipeline connected to the oil well casing. The casing gas in the oil well casing can be introduced into the pressure-stabilizing tank 3. After the solenoid valve 6 on the exhaust pipe 5 is opened, the exhaust pipe 5 emits a whistle sound wave, which is transmitted to the oil well casing and then returns. The microphone sends the sound wave signal returned in the casing gas pipeline detected by the microphone to the measurement and control terminal 1. At the same time, the pressure transmitter 4 sends the casing gas pressure to the measurement and control terminal 1. The measurement and control terminal 1 According to the above signal, the height of the liquid level in the casing of the oil well is calculated, so that the staff can adjust the pumping depth of the oil pump to avoid empty pumping of the oil pump, improve the oil production efficiency, and reduce the oil production consumption; the inlet of the surge tank 3 is connected to the outside of the shell 8 through the first explosion-proof joint 9. The first explosion-proof joint 9 can improve the sealing between the inlet of the surge tank 3 and the inside of the shell 8, which can effectively prevent the combustible gas in the casing gas pipeline from entering the shell 8 and contacting the measurement and control terminal 1 and the power supply 2 and other circuit-related parts, and can avoid the combustible gas from being ignited and causing an explosion accident.

[0030] Example 2

[0031] refer to Figure 3 On the basis of Example 1, a connecting sleeve 10 and a pressure cover 11 are connected to the inlet of the pressure-stabilizing tank 3, the pressure cover 11 is located on the inner side of the shell 8, the first explosion-proof joint 9 includes an explosion-proof interface 26, a round nut 12 and a stuffing box 13 are arranged in the explosion-proof interface 26, a pipe plug 14 is connected to the port of the explosion-proof interface 26, and the connecting sleeve 10 passes through the round nut 12, the stuffing box 13 and the pipe plug 14 and then passes out of the shell 8.

[0032] The upper port of the connecting sleeve 10 is connected to the inlet of the pressure-stabilizing tank 3 through the pressure cap 11. The connecting sleeve 10 is connected to the sleeve air pipeline after passing through the first explosion-proof joint 9. The connecting sleeve 10 is provided with a thread at the place where it passes through the shell 8, and is connected with a round nut 12 through the thread to fix it relative to the shell 8. The connecting sleeve 10 is filled with a stuffing box 13 in the explosion-proof interface 26 for sealing. The port of the explosion-proof interface 26 is connected with a pipe plug 14 through a thread to fix the stuffing box 13 between the explosion-proof interface 26 and the connecting sleeve 10.

[0033] Example 3

[0034] refer to Figure 1 and Figure 2 On the basis of Example 2, the outer end of the connecting sleeve 10 is connected with a ball valve 15 and a tee 16 in sequence.

[0035] The end of the connecting sleeve 10 is connected to a tee 16, which is connected to the sleeve gas pipeline through the tee 16 so that the connecting sleeve 10 can remain in a vertical state. The ball valve 15 between the connecting sleeve 10 and the tee 16 can control the conduction or closing of the connecting sleeve 10. Only after the ball valve 15 is opened can the sleeve gas be introduced from the connecting sleeve 10 into the pressure regulating tank 3.

[0036] Example 4

[0037] refer to Figure 4 On the basis of Example 1, a second explosion-proof joint 17 is provided on the shell 8, and the second explosion-proof joint 17 includes an explosion-proof interface 26, and a stuffing box 13 and a pipe plug 14 are provided in the explosion-proof interface 26. The exhaust pipe 5 passes through the stuffing box 13 and the pipe plug 14 to the outside of the shell 8, and the outer port of the exhaust pipe 5 is also connected to an elbow 18.

[0038] A stuffing box 13 is filled between the exhaust pipe 5 and the explosion-proof interface 26 in the second explosion-proof joint 17 and is blocked by a pipe plug 14. The elbow 18 at the end of the exhaust pipe 5 can prevent rainwater from flowing in.

[0039] Example 5

[0040] refer to Figure 5 On the basis of Example 1, it further includes an antenna 7, which is connected to the signal output end of the measurement and control terminal 1 through a signal line 701; the antenna 7 extends out of the shell 8.

[0041] When the measurement and control terminal 1 can transmit signals through the antenna 7 , the antenna 7 is connected to the signal transmission port of the measurement and control terminal 1 through the signal line 701 , and the end of the antenna 7 extends out of the housing 8 .

[0042] Example 6

[0043] refer to Figure 5 On the basis of Example 5, a third explosion-proof joint 19 is provided on the shell 8, and the third explosion-proof joint 19 includes an explosion-proof interface 26, and a fixing seat 20, a stuffing box 13 and a pipe plug 14 are provided in the explosion-proof interface 26. The antenna 7 is connected to the fixing seat 20 and extends out of the shell 8 through the stuffing box 13 and the pipe plug 14.

[0044] A fixing seat 20 is provided in the explosion-proof interface 26 in the third explosion-proof joint 19, and the root of the antenna 7 is connected to the fixing seat 20. The internal signal line 701 passes through the fixing seat 20 and the shell 8 and is connected to the signal sending end of the measurement and control terminal 1. A stuffing box 13 is filled between the fixing seat 20 and the explosion-proof interface 26 and is sealed by a pipe plug 14.

[0045] Example 7

[0046] refer to Figure 6 On the basis of Example 1, a fourth explosion-proof joint 21 is further provided on the shell 8, and the fourth explosion-proof joint 21 includes an explosion-proof interface 26. The explosion-proof interface 26 is provided with a stuffing box 13, an inner square pipe plug 23 and an explosion-proof socket 22 from the inside to the outside. The explosion-proof socket 22 is connected to a cable 24, and the cable 24 passes through the inner square pipe plug 23 and the stuffing box 13 into the shell 8, and is connected to the measurement and control terminal 1 and the power supply 2.

[0047] The measurement and control terminal 1 can also be powered and transmit signals through an external cable 24. A fourth explosion-proof connector 21 is arranged on the shell 8. A stuffing box 13 and an inner square pipe plug 23 are arranged in the explosion-proof interface 26 in the fourth explosion-proof connector 21. The port of the explosion-proof interface 26 is connected to an explosion-proof socket 22. The cable 24 on the explosion-proof socket 22 passes through the inner square pipe plug 23 and the stuffing box 13 and enters the shell 8 to be connected to the measurement and control terminal 1.

[0048] Example 8

[0049] refer to Figure 1 and Figure 2 Based on Example 1, a support frame 25 is connected to the outside of the shell 8.

[0050] The upper end of the support frame 25 is connected to the shell 8, and the lower end can be supported on the ground, so that the shell 8 remains upright and the gas pipe connected to the inlet of the pressure-stabilizing tank 3 will not be twisted or loosened due to the center of gravity shift.

[0051] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. An explosion-proof oil well liquid level dynamic monitor, characterized in that: include: A measurement and control terminal (1) and a power supply (2); A pressure stabilizing tank (3), the pressure stabilizing tank (3) having an inlet and two outlets, the inlet of the pressure stabilizing tank (3) being directly or indirectly connected to the oil well casing, a microphone being installed in the pressure stabilizing tank (3), the microphone being connected to the measurement and control terminal (1) for signal; A pressure transmitter (4), the pressure transmitter (4) being connected to one of the outlets of the pressure regulating tank (3), and the pressure transmitter (4) being signal-connected to the measurement and control terminal (1); An exhaust pipe (5), the exhaust pipe (5) being connected to another outlet of the pressure-sustaining tank (3), and the exhaust pipe (5) being connected to a solenoid valve (6); A housing (8), wherein the measurement and control terminal (1), the power supply (2), the pressure-stabilizing tank (3) and the pressure transmitter (4) are all arranged in the housing (8); a first explosion-proof joint (9) is arranged on the housing (8); an inlet of the pressure-stabilizing tank (3) is connected to the outside of the housing (8) through the first explosion-proof joint (9); The inlet of the pressure-stabilizing tank (3) is connected to a connecting sleeve (10) and a gland (11), the gland (11) is located on the inner side of the shell (8), the first explosion-proof joint (9) comprises an explosion-proof interface (26), a round nut (12) and a stuffing box (13) are arranged inside the explosion-proof interface (26), a pipe plug (14) is connected to the port of the explosion-proof interface (26), and the connecting sleeve (10) passes through the round nut (12), the stuffing box (13) and the pipe plug (14) and then passes out of the shell (8); The shell (8) is provided with a second explosion-proof joint (17), the second explosion-proof joint (17) comprising an explosion-proof interface (26), a stuffing box (13) and a pipe plug (14) being provided in the explosion-proof interface (26), the exhaust pipe (5) passing through the stuffing box (13) and the pipe plug (14) to the outside of the shell (8), and the outer end of the exhaust pipe (5) is also connected to an elbow (18); It also comprises an antenna (7), the antenna (7) being connected to the signal output end of the measurement and control terminal (1) via a signal line (701); the antenna (7) extending out of the housing (8); The shell (8) is provided with a third explosion-proof joint (19), the third explosion-proof joint (19) comprising an explosion-proof interface (26), a fixing seat (20), a stuffing box (13) and a pipe plug (14) being provided inside the explosion-proof interface (26), the antenna (7) being connected to the fixing seat (20) and passing through the stuffing box (13) and the pipe plug (14) to extend out of the shell (8); The housing (8) is also provided with a fourth explosion-proof joint (21), the fourth explosion-proof joint (21) comprising an explosion-proof interface (26), the explosion-proof interface (26) being provided with a stuffing box (13), an inner square pipe plug (23) and an explosion-proof socket (22) in sequence from the inside to the outside, the explosion-proof socket (22) being connected with a cable (24), the cable (24) passing through the inner square pipe plug (23) and the stuffing box (13) and entering the housing (8), and being connected to the measurement and control terminal (1) and the power supply (2).

2. The explosion-proof oil well liquid level dynamic monitor according to claim 1, characterized in that: The outer end of the connecting sleeve (10) is connected in sequence to a ball valve (15) and a three-way connection (16).

3. The explosion-proof oil well liquid level dynamic monitor according to claim 1, characterized in that: The outside of the housing (8) is connected to a support frame (25).

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