Continuous-firing low-consumption pneumatic sounder

Abstract

The utility model relates to the technical field of oil field liquid level depth testing, and discloses a running-firing low-consumption pneumatic sounder, which is characterized in that a reset mechanism is pulled to press down a sealing rod assembly and simultaneously compress a spring A, the sealing rod assembly drives a sealing ring B to slide in a central hole of an upper cover assembly, and meanwhile, a sealing ring D gradually slides into a central hole of a lower cover assembly to block communication between a lower air chamber and an air throat; then, a sealing ring C on the sealing rod assembly gradually slides out of an air guide hole, a gap between an air guide groove and the air guide hole is gradually increased, and the upper air chamber is communicated with the lower air chamber until a sealing ring D on the sealing rod assembly completely enters a center hole of the lower cover assembly, the tail end of the sealing rod assembly does not block the percussion rod any more and pops up under the action of a spring B; the oil-gas well liquid level depth measuring device overcomes the defects that during oil-gas well liquid level depth measurement in the prior art, filling and measuring are conducted once, a pressure container is heavy, the usage amount of compressed gas in single measurement is large, cost is high, work intensity is large, and testing efficiency is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil field liquid level depth testing, in particular to a continuous low-consumption pneumatic sounder. Background Art

[0002] At present, in the field of pneumatic noise measurement, when manually measuring the liquid level depth of oil and gas wells, the sound source generally uses casing gas or compressed nitrogen. When the casing gas cannot obtain qualified liquid level test data, compressed nitrogen can be used as the sound source. When using compressed nitrogen as the test sound source, connect the wellhead sounder to the oil and gas well casing test joint, connect the wellhead sounder to the data recorder with a data cable, open the data recorder to set relevant parameters, use the inflation line to reliably connect the inflation port of the nitrogen bottle with the inflation port of the air chamber of the wellhead sounder, close the deflation valve on the wellhead sounder, slowly open the nitrogen bottle valve, close the nitrogen bottle valve when the air chamber is inflated to the required air pressure, slowly open the casing valve completely, start the sound device, and confirm that the recorder obtains qualified data. If the compressed nitrogen filled this time does not obtain qualified data after firing (releasing), the nitrogen bottle valve will be opened again, and the compressed nitrogen will be re-injected and measured again. Until qualified data is obtained.

[0003] When measuring the liquid level depth of oil and gas wells, logging personnel generally carry wellhead sounders, data recorders (including data cables), nitrogen bottles (including high-pressure pipelines), installation tools, etc.

[0004] In summary, when the liquid level depth of oil and gas wells is measured manually, the wellhead sounder will fire (release) compressed nitrogen after inflation, generating pneumatic sound (generally, the compressed nitrogen in the air chamber of the wellhead sounder will be completely released or a small part of the compressed nitrogen will remain and not be completely released). If the inflation pressure is too small, qualified data cannot be measured. Although qualified data can be measured with excessive inflation pressure, it also causes excessive waste of compressed nitrogen. In case of special wells, it is necessary to repeatedly adjust the measurement parameters and inflate and fire the wellhead sounder multiple times until qualified data is measured. Even if a certain amount of compressed nitrogen is deliberately filled, it is inevitable to open and close the bottle valve every time it is inflated, which reduces the leakage-free duration of the opening and closing bottle valve, reduces the service life of the bottle valve, and increases the logging time due to repeated inflation, reducing the logging work efficiency. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a continuous low-consumption pneumatic sounder, which has a pure mechanical structure, simple structure, reliable sealing, long working life, and consumes less total amount of compressed gas in a single test. The continuous low-consumption pneumatic sounder and its use method can achieve continuous firing (release) after a certain amount of compressed gas is filled once. It meets the basic needs of the test for sound intensity, reduces the logging time increased by repeated inflation, reduces the number of times the compressed gas source device is carried to the well for inflation, reduces the total mass of items carried for logging, avoids excessive waste of external compressed gas, reduces the number of times the compressed gas source device is opened and closed, prolongs the leakage-free duration of the compressed gas source device, increases the service life of the compressed gas source device, and improves the work efficiency of logging.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A continuous low-consumption pneumatic sounder, comprising a protective cover, an air intake mechanism, a manual pressure relief valve, a pressure indicating device, a firing mechanism, an upper cover assembly, a reset rod, an air chamber, a lower cover assembly, a sealing rod assembly, and a spring A. The characteristic is that the air chamber is divided into an upper air chamber and a lower air chamber by a partition groove with an air guide hole, and the two ends are respectively threadedly connected with the upper cover assembly and the lower cover assembly with a center hole structure, and a sealing ring A and a sealing ring E are added therebetween. The sealing rod assembly is additionally provided with sealing rings B, C, and D, which are slidably matched with each center hole and seal each center hole, and there is a gap between the air guide groove and the air guide hole, which is used to connect the upper air chamber and the lower air chamber.

[0008] The spring A is placed between the boss and the partition groove, and is used for the sealing rod assembly to slide in the limited area, so that it can close or connect the lower cover assembly and the central hole of the air guide hole at different positions. The air chamber is used to store high-pressure gas.

[0009] The upper cover assembly is respectively connected with an air intake mechanism, a manual pressure relief valve, a reset rod, and a firing mechanism on the outside and has an air discharge passage and an air intake passage inside.

[0010] The air intake mechanism is threadedly connected to the upper cover assembly, with a sealing gasket A with a processed center hole added therebetween, and the other end is threadedly connected to the protective cover, with a sealing gasket B added therebetween, the air intake mechanism shell is composed of an air intake piece with a processed air intake passage and an air outlet piece threadedly connected, with a sealing ring F added therebetween, one side of the spring C is placed on the inner end surface of the air outlet piece, and the other side is placed in a sealing platform groove with a vent hole on the side wall, so that its tip is subjected to force to form a sealing contact surface with the sealing gasket C placed in the air intake piece groove, the sealing platform is slidably matched with the inner cavity of the air outlet piece, and the air intake piece and the protective cover are threadedly matched. The air outlet part is threadedly connected with the air inlet duct on the upper cover assembly, and a sealing gasket A with a center hole is added therebetween to connect the air duct with the upper cover assembly and prevent leakage; one end of the manual pressure relief valve is threadedly connected with the upper cover assembly, and a sealing gasket A with a machined center hole is added therebetween to block the connection between the air chamber and the vent hole through the air duct of the upper cover assembly, and the other end is threadedly connected with the pressure indicating device, and a sealing gasket A with a machined center hole is added therebetween to connect the air duct with the upper cover assembly and prevent leakage.

[0011] The reset rod is connected to the bracket via a pin and can rotate around the pin in the bracket positioning hole. It is used to press down the sealing rod assembly and the compression spring A until the firing rod is pushed out to limit the movement of the sealing rod assembly.

[0012] The firing mechanism is threadably connected to the upper cover assembly via a fixed seat thread. The firing rod can slide in the fixed seat and the upper cover assembly, with a spring B added therebetween. The firing rod is used to limit the sealing rod assembly from being pushed out by the spring A.

[0013] Preferably, the air hose on the lower cover assembly is used to connect to a testing mechanism and transfer to the wellhead of an oil and gas well.

[0014] Due to the adoption of the above technical solution, the continuous low-consumption pneumatic sounder of this embodiment has the following characteristics:

[0015] (1) Pure mechanical structure, simple parts structure and low processing cost;

[0016] (2) The sealing gasket and sealing ring are reliable, easy to maintain and low cost;

[0017] (3) Reduce the use of compressed gas from external gas sources to avoid waste caused by excessive inflation;

[0018] (4) Reduce the logging time caused by repeated aeration and reduce the workload;

[0019] (5) Reduce the amount of compressed gas used during a single inflation test.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0021] Compared with the prior art, the utility model solves the shortcomings of one-charge-one-measurement in the previous measurement of the liquid level depth of oil and gas wells, heavy pressure vessels, large amount of compressed gas used in a single measurement, high cost, high work intensity, and low testing efficiency. The continuous low-consumption pneumatic sounder can reduce the number of times the pressure vessel is opened and closed, reduce the total weight of the materials carried, and reduce the amount of compressed gas used in a single measurement, which indirectly reduces costs, reduces work intensity, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the appearance structure of the utility model;

[0023] Figure 2 It is a side cross-sectional view of the ready-to-fire air intake mechanism and the reset rod of the utility model;

[0024] Figure 3 It is a side sectional view of the manual pressure relief valve and the firing mechanism after firing of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model. Example

[0026] Reference Figure 1 The present embodiment provides a continuous low-consumption pneumatic sound generator, including a protective cover 1, an air intake mechanism 2, a manual pressure relief valve 3, a pressure indicating device 4, a firing mechanism 5, an upper cover assembly 6, a reset rod 7, an air chamber 8, a lower cover assembly 9, a sealing rod assembly 10, and a spring A12.

[0027] The air chamber 8 is divided into an upper air chamber 81 and a lower air chamber 82 by a partition groove 83 with an air guide hole 84. The two ends are respectively threadedly connected to the upper cover component 6 and the lower cover component 9 with a center hole structure, and a sealing ring A63 and a sealing ring E92 are added in between. The sealing rod component 10 is additionally provided with a sealing ring B103, a sealing ring C104, and a sealing ring D105, which slide with each center hole and seal each center hole. There is a gap between the air guide groove 101 and the air guide hole 84, which is used to connect the upper air chamber 81 and the lower air chamber 82.

[0028] The spring A12 is placed between the boss 102 and the partition groove 83, and is used for the sealing rod assembly 10 to slide in the limited area, so that it closes or connects the lower cover assembly 9 and the central hole of the air guide hole 84 at different positions. The air chamber 8 is used to store high-pressure gas.

[0029] The upper cover assembly 6 is connected to the air intake mechanism 2, the manual pressure relief valve 3, the reset rod 7, and the firing mechanism 5 on its periphery, and has an air release passage 65 and an air intake passage 66 inside.

[0030] The air intake mechanism 2 is threadedly connected to the upper cover assembly 6, and a sealing gasket A64 with a processed center hole is added therebetween. The other end is threadedly connected to the protective cover 1, and a sealing gasket B11 is added therebetween. The outer shell of the air intake mechanism 2 is composed of an air intake member 21 with a processed air intake passage and an air outlet member 26, which are threadedly connected, and a sealing ring F25 is added therebetween. One side of the spring C24 is placed on the inner end surface of the air outlet member 26, and the other side is placed in the groove of the sealing platform 23 with a vent hole on the side wall, so that its tip is subjected to force to form a sealing contact surface with the sealing gasket C22 placed in the groove of the air intake member 21. The sealing platform 23 is slidably matched with the inner cavity of the air outlet member 26. The air intake member 21 is threadedly connected to the protective cover 1, and a sealing gasket B11 is added therebetween to close the airway of the air intake member 21. The air outlet member 26 is threadedly connected to the air intake passage on the upper cover assembly 6, and a sealing gasket A64 with a center hole is added therebetween, so that its airway is connected to the air chamber 8 of the upper cover assembly 6 without leakage.

[0031] One end of the manual pressure relief valve 3 is threadedly connected to the upper cover assembly 6, and a sealing gasket A64 with a machined center hole is added therebetween to block the air chamber 8 from communicating with the vent hole 67 through the air passage of the upper cover assembly 6. The other end is threadedly connected to the pressure indicating device 4, and a sealing gasket A64 with a machined center hole is added therebetween to ensure that the air passage is connected and does not leak.

[0032] The reset rod 7 is connected to the bracket 61 via a pin 62 and can rotate around the pin 62 in the positioning hole of the bracket 61 to press down the sealing rod assembly 10 and the compression spring A12 until the firing rod 51 is pushed out to limit the movement of the sealing rod assembly 10.

[0033] The firing mechanism 5 is threadedly connected to the upper cover assembly 6 through the thread of the fixing seat 52. The firing rod 51 can slide in the fixing seat 52 and the upper cover assembly 6. A spring B53 is added between them. The firing rod 51 is used to limit the sealing rod assembly 10 from being pushed out by the spring A12.

[0034] The air hose 91 on the lower cover assembly 9 is used to connect the testing mechanism and transfer to the wellhead of the oil and gas well.

[0035] When the utility model is used, the steps of its use method are as follows:

[0036] Step 1: When using external compressed gas to measure the liquid level depth of the oil and gas well, that is, when the pressure in the lower air chamber 82 is greater than the pressure on the side of the air pipe 91, it is equivalent to that the pressure in the lower air chamber 82 is greater than the pressure in the oil and gas well. After connecting the test mechanism through the air pipe 91 on the lower cover assembly 9 and connecting to the wellhead of the oil and gas well, pull the reset mechanism 7 to press down the sealing rod assembly 10 and compress the spring A12 at the same time. The sealing rod assembly 10 drives the sealing ring B103 to slide in the center hole of the upper cover assembly 6, and the sealing ring D105 gradually slides into the center hole of the lower cover assembly 9 to block the connection between the lower air chamber 82 and the air pipe 91, and then the sealing ring C104 on the sealing rod assembly 10 gradually slides out of the air guide hole 84, and the gap between the air guide groove 101 and the air guide hole 84 gradually increases, and the upper air chamber 81 and the lower air chamber 82 are connected, until the sealing ring D105 on the sealing rod assembly 10 is completely entered into the lower cover assembly 9. The end of the sealing rod assembly 10 no longer blocks the firing rod 51 and pops out under the action of the spring B53, thereby limiting the movement of the sealing rod assembly 10;

[0037] Step 2: The compressed gas storage device is sealed and connected to the inlet member 21 on the inlet mechanism 2 through a high-pressure pipe to fill the compressed gas. When the pressure of the compressed gas is greater than the pressure in the air chamber 8, the pressure of the compressed gas acts on the surface of the tip side of the sealing platform 23, causing the sealing platform 23 to move downward while compressing the spring C24. At this time, the air passage of the inlet mechanism 2 is opened through the air passage of the inlet member 21, the air holes on the side of the sealing platform 23, the air passage of the outlet member 26, the air passage of the upper cover assembly 6, the upper air chamber 81, the air guide groove 101 and the gap of the air guide hole 84 until it reaches the lower air chamber 82. After an appropriate amount of compressed gas is filled into the pressure indicating device 4 by observing, the valve of the compressed gas storage device is closed. At this time, the compressed gas in the pipeline no longer flows, the pressure on the side of the outlet member 26 is equal to the compressed gas pressure in the high-pressure pipe on the side of the inlet member 21, the pressures on both sides of the sealing platform 23 are equal, that is, the forces are equal, and the spring C24 rebounds to re-enable the sealing platform 23. The tip is subjected to force to form a sealing contact surface with the sealing gasket C22 placed in the groove of the air inlet 21, and the air passage on the air outlet 26 side is disconnected from the air passage on the air inlet 21 side. At this time, the connection between the compressed gas source storage device and the air inlet is disconnected, and the compressed gas on the air outlet 26 side, the upper air chamber 81, and the lower air chamber 82 will not leak and are sealed in the space;

[0038] Step 3: Move the firing mechanism 5, release the restriction on the sealing rod assembly 10, and the spring A12 rebounds instantly, lifting the boss 102 so that the sealing rod assembly 10 drives the sealing ring B103 to slide in the center hole of the upper cover assembly 6, and the gap between the air guide groove 101 on the sealing rod assembly 10 and the air guide hole 84 gradually becomes smaller, and the sealing ring C104 slides into the air guide hole 84 to form a seal. At this time, the original air passages of the upper air chamber 81 and the lower air chamber 82 are disconnected, and the connected state is changed into two closed spaces with equal pressure, and then the sealing ring D105 gradually slides away from the center hole of the lower cover assembly 9. When the upper part of the boss 102 pushes to the limit position of the upper cover assembly 6 and stops moving, the lower air chamber 82 and the air hose 91 reach the maximum connection state through the center hole of the lower cover assembly 9, and the compressed gas in the lower air chamber 82 instantly enters the air hose 91 side, generating a pneumatic sound. This movement process occurs instantly. During this process, the lower air chamber 82 After the internal compressed gas is released, the pressure decreases until the pressure in the lower air chamber 82 is equal to the pressure in the air throat 91, at which time the pressure in the upper air chamber 81 remains unchanged;

[0039] Step 4: When it is necessary to fire again, pull the reset mechanism 7 to press down the sealing rod assembly 10 and compress the spring A12 at the same time. The sealing rod assembly 10 drives the sealing ring B103 to slide in the center hole of the upper cover assembly 6. At the same time, the sealing ring D105 gradually slides into the center hole of the lower cover assembly 9 to seal it, blocking the connection between the lower air chamber 82 and the air throat 91. Then the sealing ring C104 on the sealing rod assembly 10 gradually slides out of the air guide hole 84, and the gap between the air guide groove 101 and the air guide hole 84 gradually increases. The upper air chamber 81 and the lower air chamber 82 are connected, and the compressed gas in the upper air chamber 81 enters the lower air chamber 82 until the pressure is equal. Then the end of the sealing rod assembly 10 no longer blocks the firing rod 51, so that it pops out under the action of the spring B53, limiting the movement of the sealing rod assembly 10. If it is necessary to measure again, repeat steps 1, step 2 (except that the compressed gas is no longer filled), step 3, and step 4. , until the pressure in the upper air chamber 81 and the lower air chamber 82 approaches the pressure in the oil and gas well or the oil and gas well liquid level measurement is completed;

[0040] Step 5: When the pressure in the lower air chamber 82 is less than the pressure on the side of the air pipe 91, which is equivalent to the pressure in the lower air chamber 82 being less than the pressure in the oil and gas well, there is no need to use a compressed gas storage device to inject compressed gas. Instead, the compressed gas in the oil and gas well is used to move the firing mechanism 5, and the restriction on the sealing rod assembly 10 is released. At the same time, the spring A12 rebounds instantly, lifting the boss 102 so that the sealing rod assembly 10 drives the sealing ring B103 to slide in the center hole of the upper cover assembly 6. The gap between the air guide groove 101 on the sealing rod assembly 10 and the air guide hole 84 gradually becomes smaller, and the sealing ring C104 slides into the air guide hole 84 to form a seal. At this time, the original air passages of the upper air chamber 81 and the lower air chamber 82 are disconnected, and the connected state is changed into two closed spaces. Then the sealing ring D105 gradually slides away from the center hole of the lower cover assembly 9. When the upper part of the boss 102 pushes to the limit position of the upper cover assembly 6 and stops moving, the lower air chamber 82 When the air hose 91 reaches the maximum connection state through the central hole of the lower cover assembly 9, the compressed gas on the air hose 91 side instantly enters the lower air chamber 82, generating a pneumatic sound. This movement process occurs instantly, and the pressure in the lower air chamber 82 instantly increases during this process until the pressure in the lower air chamber 82 is equal to the pressure in the air hose 91 side, which is equivalent to the pressure in the lower air chamber 82 being equal to the pressure in the oil and gas well. At this time, the pressure in the upper air chamber 81 remains unchanged;

[0041] Step 6: When it is necessary to fire again, pull the reset mechanism 7 to press down the sealing rod assembly 10 and compress the spring A12 at the same time. The sealing rod assembly 10 drives the sealing ring B103 to slide in the center hole of the upper cover assembly 6. At the same time, the sealing ring D105 gradually slides into the center hole of the lower cover assembly 9 to seal it, blocking the connection between the lower air chamber 82 and the air throat 91. Then the sealing ring C104 on the sealing rod assembly 10 gradually slides out of the air guide hole 84, and the gap between the air guide groove 101 and the air guide hole 84 gradually increases. The upper air chamber 81 and the lower air chamber 82 are connected, and the compressed gas in the lower air chamber 82 enters the upper air chamber 81 until the pressure is equal. Then the end of the sealing rod assembly 10 no longer blocks the firing rod 51, so that it pops out under the action of the spring B53, restricting the movement of the sealing rod assembly 10, and screwing to open the manual pressure relief valve 3, so that the upper air chamber 81, the lower air chamber 82, the air release channel 65, and the air release hole 67 are opened. Connect to the atmosphere and release the internal pressure until it is equal to the atmospheric pressure. If you need to measure again, repeat steps 5 and 6 until the oil and gas well liquid level measurement is completed.

Claims

1. A continuous low-consumption pneumatic sounder, comprising a protective cover (1), an air intake mechanism (2), a manual pressure relief valve (3), a pressure indicating device (4), a firing mechanism (5), an upper cover assembly (6), a reset rod (7), an air chamber (8), a lower cover assembly (9), a sealing rod assembly (10), and a spring A (12), characterized in that: The air chamber (8) is divided into an upper air chamber (81) and a lower air chamber (82) by a partition groove (83) with an air guide hole (84), and the two ends are respectively threadedly connected to an upper cover assembly (6) and a lower cover assembly (9) with a center hole structure, and a sealing ring A (63) and a sealing ring E (92) are added therebetween. A sealing ring B (103), a sealing ring C (104), and a sealing ring D (105) are added to the sealing rod assembly (10) to slide with and seal the center holes. A gap is provided between the air guide groove (101) and the air guide hole (84) for connecting the upper air chamber (81) and the lower air chamber (82); The spring A (12) is placed between the boss (102) and the partition groove (83) and is used to allow the sealing rod assembly (10) to slide in a limited area so that it closes or connects the center hole of the lower cover assembly (9) and the air guide hole (84) at different positions. The air chamber (8) is used to store high-pressure gas. The upper cover assembly (6) is connected to the air intake mechanism (2), the manual pressure relief valve (3), the reset rod (7), and the firing mechanism (5) on the outside and has an air discharge passage (65) and an air intake passage (66) on the inside. The air intake mechanism (2) is threadedly connected to the upper cover assembly (6), and a sealing gasket A (64) with a processed center hole is added therebetween. The other end is threadedly connected to the protective cover (1), and a sealing gasket B (11) is added therebetween. The outer shell of the air intake mechanism (2) is threadedly connected to form an air intake member (21) with a processed air intake passage and an air outlet member (26), and a sealing ring F (25) is added therebetween. One side of the spring C (24) is placed on the inner end surface of the air outlet member (26), and the other side is placed in a groove of a sealing platform (23) with a vent hole on the side wall, so that the tip of the spring is subjected to force to form a sealing contact surface with the sealing gasket C (22) placed in the groove of the air intake member (21). The sealing platform (23) and the inner cavity of the air outlet member (26) are slidably matched. The air intake member (21 ) is threadedly connected to the protective cover (1), and a sealing gasket B (11) is added therebetween to close the air passage of the air inlet member (21); the air outlet member (26) is threadedly connected to the air inlet passage on the upper cover assembly (6), and a sealing gasket A (64) with a center hole is added therebetween to enable the air passage to communicate with the upper cover assembly (6) and prevent leakage; one end of the manual pressure relief valve (3) is threadedly connected to the upper cover assembly (6), and a sealing gasket A (64) with a center hole is added therebetween to block the air passage of the air chamber (8) from communicating with the air release hole (67) through the air passage of the upper cover assembly (6); the other end is threadedly connected to the pressure indicating device (4), and a sealing gasket A (64) with a center hole is added therebetween to enable the air passage to communicate and prevent leakage; The reset rod (7) is connected to the bracket (61) via a pin (62) and can rotate around the pin (62) in the positioning hole of the bracket (61) to press down the sealing rod assembly (10) and the compression spring A (12) until the firing rod (51) is pushed out to limit the movement of the sealing rod assembly (10); The firing mechanism (5) is threadably connected to the upper cover assembly (6) via a threaded fixing seat (52); the firing rod (51) can slide in the fixing seat (52) and the upper cover assembly (6); a spring B (53) is provided between the fixing seat (52) and the upper cover assembly (6); the firing rod (51) is used to limit the sealing rod assembly (10) from being ejected by the spring A (12).

2. A continuous low-consumption pneumatic sounder according to claim 1, characterized in that: The air pipe (91) on the lower cover assembly (9) is used to connect to a testing mechanism and to transfer to the wellhead of an oil and gas well.

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