Anti-splashing device for shaft liquid level detection and use method

Abstract

The invention discloses an anti-splashing device for shaft liquid level detection and a using method. The anti-splashing device comprises a protection body, a fluid channel is formed in the protection body, a gate plate is further arranged in the protection body, and the gate plate can block the fluid channel; a drainage hole is formed in the side wall of the protection body, the drainage hole communicates with the fluid channel and is located below the flashboard, and a blocking piece is arranged on the outer side of the protection body and used for blocking the drainage hole. The state of the flashboard can be adjusted according to detection requirements, so that the fluid channel is in a blocked or through state, the flashboard is matched with the drainage hole below, when the liquid level needs to be detected, the flashboard is opened, the drainage hole is blocked, after detection is completed, the flashboard blocks the fluid channel, the drainage hole is opened, and the flashboard can block splashed liquid. The device can be independently installed at the liquid level monitoring port or integrated at the front end of the liquid level detection equipment for use, and the liquid level depth information of the shaft can be obtained in time.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling development, and relates to an anti-splashing device for wellbore liquid level detection and a use method thereof. Background Art

[0002] When detecting the liquid level depth in the annulus and the liquid level depth in the tubing of drilling wells, oil and gas wells, etc. on the ground, since the gas in the annulus and tubing is affected by multiple factors such as the fluid in the wellbore, downhole tools and temperature, a mixed fluid will splash out of the detection port, thereby contaminating the liquid level detection unit connected there. In serious cases, it will damage the detection equipment and injure the detection operator.

[0003] However, the inability to provide accurate and timely information on the liquid level during critical high-risk events such as leaks and overflows can hinder the rapid resolution of wellbore complications and prevent further deterioration. Therefore, ensuring the safety of liquid level detection equipment and being able to quickly measure the wellbore liquid level at any time is a key technology that needs to be addressed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that mixed fluid often rushes out of the detection port during wellbore liquid level detection in the prior art, causing pollution or damage to the detection equipment, and in serious cases injuring the operator, thereby failing to provide wellbore liquid level depth information in a timely manner, which brings unfavorable factors to the complexity of rapid on-site disposal, and provides a splash-proof device for wellbore liquid level detection and a method of use.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A splash prevention device for wellbore liquid level detection, comprising a protection body, a fluid channel formed inside the protection body, and a gate plate provided inside the protection body, capable of blocking the fluid channel;

[0007] A leakage hole is provided on the side wall of the protective body, the leakage hole is connected to the fluid channel, the leakage hole is located below the gate plate, and a blocking piece is provided on the outside of the protective body, the blocking piece is used to block the leakage hole.

[0008] A further improvement of the present invention is:

[0009] A gate installation channel is provided inside the protection body, the gate installation channel is located on the side of the fluid channel, and the gate is located inside the gate installation channel;

[0010] The gate plate can move along the gate plate installation channel. When the gate plate extends into the interior of the fluid channel, the gate plate can block the fluid channel.

[0011] The gate installation channel is vertically distributed with the fluid channel.

[0012] A gate groove symmetrical to the gate installation channel is provided inside the protective body, and the gate can extend into the gate groove after passing through the fluid channel transversely.

[0013] The side wall of the gate installation channel passes through a manual handle, the end of the manual handle extending into the gate installation channel is connected to the gate, the manual handle is located outside the gate installation channel and is rotatably connected to a connecting rod, and the end of the connecting rod away from the manual handle is rotatably connected to a blocking member;

[0014] The manual handle can drive the gate to move laterally along the gate installation channel. When the gate moves laterally, the connecting rod drives the blocking piece to move upward or downward along the side wall of the protective body.

[0015] An electric motor is arranged at a port of the gate installation channel away from the fluid channel, and a driving end of the electric motor is connected to the gate.

[0016] The electric motor is a DC push rod motor.

[0017] The blocking piece is a sliding sleeve, and the sliding sleeve can move up and down along the side wall of the protective body.

[0018] There are two symmetrical leakage holes.

[0019] A method for using a splash prevention device for wellbore liquid level detection comprises the following steps:

[0020] Open the gate to make the fluid channel inside the protective body open, and the blocking piece blocks the leakage hole. At this time, the liquid level detection device to be used is installed on the upper end of the protective body to measure the liquid level;

[0021] After the measurement is completed, the gate seals the fluid channel, moves the sealing piece, and opens the leakage hole. If fluid splashes out of the wellbore, the fluid will flow out through the leakage hole.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention discloses an anti-splashing device for wellbore liquid level detection. This device can adjust the state of the gate plate according to the detection requirements, so that the fluid channel is in a blocked or connected state, and cooperate with the leakage hole below. When the liquid level needs to be detected, the gate plate is opened to block the leakage hole. When the detection is completed, the gate plate blocks the fluid channel and the leakage hole is opened. If liquid splashing occurs, the splashed liquid can flow out directly through the leakage hole. Due to the obstruction of the gate plate in the middle, the splashed liquid will not affect the liquid level detection equipment at the upper end, and the oil can be prevented from causing pollution or damage to the detection equipment. This device can be independently installed at the liquid level monitoring port, or integrated at the front end of the liquid level detection equipment for use. It can greatly protect the detection equipment, and can provide wellbore liquid level depth information in a timely manner, always grasp the actual situation of the downhole fluid, and eliminate safety hazards in a timely manner.

[0024] Furthermore, in the present invention, a gate installation channel is provided inside the protective body to facilitate the movement of the gate inside, making the blocking and opening of the gate more convenient to operate.

[0025] Furthermore, in the present invention, a gate groove symmetrical to the gate installation channel is opened inside the protective body. When the gate passes through the fluid channel horizontally, it can extend into the gate groove, which improves the sealing performance of the sealing state and ensures the stability of the gate during the sealing process.

[0026] Furthermore, in the present invention, the connecting rod rotates to connect the manual handle and the sealing piece respectively. When the manual handle drives the gate plate to move toward the fluid channel to seal the fluid channel, the connecting rod drives the sealing piece to move downward and the leakage hole opens. When the manual handle drives the gate plate to move away from the fluid channel, the fluid channel opens, the sealing piece moves upward, and the leakage hole is sealed. Under the action of the connecting rod, the sealing of the fluid channel and the opening of the leakage hole can be operated synchronously, and the operation is convenient and quick.

[0027] Furthermore, in the present invention, a motor is provided at a port of the gate installation channel away from the fluid channel to realize automatic movement of the gate, thereby achieving the purpose of remote automatic detection of the liquid level without the need for an operator to observe in real time.

[0028] The present invention discloses a method for using an anti-splashing device for wellbore liquid level detection. When the device is in a detection state, the gate is opened, and the interior of the fluid channel is in a through state. At this time, the leakage hole is closed, and the equipment starts to detect the liquid level. When detection is not required, the gate seals the fluid channel and the leakage hole is opened. If oil splashes, the oil flows out through the leakage hole with the gate separating it in the middle. The splashed oil will not pollute or affect the detection equipment above, thereby ensuring the safety of the detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 is a cross-sectional view of the present invention in a measuring state;

[0031] Figure 2 A three-dimensional diagram of the present invention in a measuring state;

[0032] Figure 3 A cross-sectional view of the present invention in a standby state;

[0033] Figure 4 It is a three-dimensional diagram of the present invention in a standby state.

[0034] Among them: 1-protective body; 2-gate; 3-sleeve; 4-manual handle; 5-connecting rod; 6-leakage hole; 7-motor. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The present invention is described in further detail below with reference to the accompanying drawings:

[0042] See also Figure 1 The embodiment of the present invention discloses a splash prevention device for wellbore liquid level detection, which can eliminate the risk of detection equipment being contaminated and damaged by the fluid in the wellbore, ensuring the normal use of the equipment. At the same time, it eliminates the need for human workers to stay next to the equipment for a long time, reduces on-site labor and manual work intensity, and reduces the risk of personnel staying in high-risk areas at the wellhead for a long time. The device specifically includes the following structure:

[0043] Example 1

[0044] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is provided inside the protective body 1, and a gate plate 2 is also provided inside the protective body 1, which can block the fluid channel; a leakage hole 6 is provided on the side wall of the protective body 1, wherein the leakage hole 6 is connected to the fluid channel, and the leakage hole 6 is located below the gate plate 2, and a sealing member is provided on the outside of the protective body 1, wherein the sealing member is used to block the leakage hole 6.

[0045] Among them, the protective body 1 is a cylindrical hollow cylinder, one end of which is a male buckle connected to the wellbore detection port; the other end is a female buckle connected to the liquid level detection equipment.

[0046] This device can adjust the state of the gate according to the detection requirements to make the fluid channel in a blocked or connected state, and cooperate with the leakage hole below. When the liquid level needs to be detected, the gate is opened to block the leakage hole. When the detection is completed, the gate blocks the fluid channel and the leakage hole is opened. If liquid splashing occurs, the splashed liquid can flow out directly through the leakage hole, without causing pollution or damage to the detection equipment above, thereby improving the safety of equipment use.

[0047] Example 2

[0048] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is provided inside the protective body 1, and a gate 2 is also provided inside the protective body 1, which can block the fluid channel; a leakage hole 6 is provided on the side wall of the protective body 1, wherein the leakage hole 6 is connected to the fluid channel, and the leakage hole 6 is located below the gate 2; a sealing member is provided on the outside of the protective body 1, and the sealing member is used to block the leakage hole 6. A gate mounting channel is provided inside the protective body 1, and the gate mounting channel is located on the side of the fluid channel, and the gate 2 is located inside the gate mounting channel; the gate 2 can move along the gate mounting channel, and when the gate 2 extends into the fluid channel, the gate 2 can block the fluid channel.

[0049] In this embodiment, a gate installation channel is provided inside the protective body to facilitate the movement of the gate inside and make the blocking and opening of the gate more convenient.

[0050] Example 3

[0051] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is provided inside the protective body 1, and a gate 2 is also provided inside the protective body 1, and the gate 2 can block the fluid channel; a leakage hole 6 is provided on the side wall of the protective body 1, and the leakage hole 6 is connected to the fluid channel, and the leakage hole 6 is located below the gate 2; a sealing member is provided on the outside of the protective body 1, and the sealing member is used to block the leakage hole 6. A gate mounting channel is provided inside the protective body 1, and the gate mounting channel is located on the side of the fluid channel, and the gate 2 is located inside the gate mounting channel; the gate 2 can move along the gate mounting channel, and when the gate 2 extends into the fluid channel, the gate 2 can block the fluid channel. The gate mounting channel is perpendicular to the fluid channel, and when the gate 2 passes through the fluid channel horizontally, the fluid channel is in a blocked state.

[0052] In this embodiment, the gate installation channel and the fluid channel are vertically distributed, which facilitates the rapid lateral movement of the gate 2 and makes the opening or blocking of the gate more convenient.

[0053] Example 4

[0054] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is defined within the protective body 1, and a gate 2 is disposed within the protective body 1, capable of blocking the fluid channel. A drain hole 6 is defined on the sidewall of the protective body 1, communicating with the fluid channel and located below the gate 2. A sealing member is disposed on the outer side of the protective body 1, configured to block the drain hole 6. A gate mounting channel is defined within the protective body 1, located lateral to the fluid channel, and the gate 2 is located within the channel. The gate 2 is movable along the channel, and when the gate 2 extends into the fluid channel, it blocks the fluid channel. The gate mounting channel is perpendicular to the fluid channel, and when the gate 2 extends transversely through the fluid channel, the fluid channel is blocked. A gate slot is defined within the protective body 1, symmetrically with the gate mounting channel, so that when the gate 2 extends transversely through the fluid channel, it can extend into the slot.

[0055] In this embodiment, the gate installation channel and the gate groove are symmetrically arranged in parallel. After the gate passes through the fluid channel, it extends into the gate groove. The gate groove cooperates with the gate installation channel to ensure the stability of the gate installation and improve the sealing effect.

[0056] Example 5

[0057] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is provided inside the protective body 1, and a gate 2 is also provided inside the protective body 1, which can block the fluid channel; a leakage hole 6 is provided on the side wall of the protective body 1, wherein the leakage hole 6 is connected to the fluid channel, and the leakage hole 6 is located below the gate 2; a sealing member is provided on the outside of the protective body 1, and the sealing member is used to block the leakage hole 6. A gate mounting channel is provided inside the protective body 1, and the gate mounting channel is located on the side of the fluid channel, and the gate 2 is located inside the gate mounting channel; the gate 2 can move along the gate mounting channel, and when the gate 2 extends into the fluid channel, the gate 2 can block the fluid channel. The side wall of the gate mounting channel passes through a manual handle 4, and the end of the manual handle 4 located in the gate mounting channel is connected to the gate 2. The manual handle 4 is located outside the gate mounting channel and is rotated to connect the connecting rod 5, and the end of the connecting rod 5 away from the manual handle 4 is rotated to connect the blocking piece; the manual handle 4 can drive the gate 2 to move laterally along the gate mounting channel, and when the gate 2 moves laterally, the connecting rod 5 drives the blocking piece to move upward or downward along the side wall of the protective body 1.

[0058] In this embodiment, one end of the connecting rod 5 is fixed to the outside of the blocking piece through a circular hole, and the connecting rod 5 and the blocking piece can rotate. The other end also has a circular hole, which is sleeved on the manual handle 4, and the connecting rod 5 can also rotate relative to the manual handle.

[0059] During use of this embodiment, when the manual handle 4 drives the gate plate 3 to move toward the fluid channel to block the fluid channel, the manual handle 4 drives the connecting rod 5 to rotate, the connecting rod 5 changes the overall tilt state, the connecting rod 5 drives the blocking piece to move downward, and the leakage hole 6 opens. When the manual handle 4 drives the gate plate 2 to move away from the fluid channel, the fluid channel opens, the manual handle 4 drives the connecting rod 5 to rotate, the connecting rod 5 drives the blocking piece to move upward, and the leakage hole is sealed. Under the action of the connecting rod 5, the blocking of the fluid channel and the opening of the leakage hole can be operated synchronously, and the operation is convenient and quick.

[0060] Example 6

[0061] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid channel is provided inside the protective body 1, and a gate 2 is also provided inside the protective body 1, which can block the fluid channel; a leakage hole 6 is provided on the side wall of the protective body 1, wherein the leakage hole 6 is connected to the fluid channel, and the leakage hole 6 is located below the gate 2; a sealing member is provided on the outside of the protective body 1, and the sealing member is used to block the leakage hole 6. A gate mounting channel is provided inside the protective body 1, and the gate mounting channel is located on the side of the fluid channel, and the gate 2 is located inside the gate mounting channel; the gate 2 can move along the gate mounting channel, and when the gate 2 extends into the fluid channel, the gate 2 can block the fluid channel. The side wall of the gate mounting channel passes through a manual handle 4, and the end of the manual handle 4 located in the gate mounting channel is connected to the gate 2. The structure of the manual handle 4 located outside the gate mounting channel is rotated to connect the connecting rod 5, and the end of the connecting rod 5 away from the manual handle 4 is rotated to connect the blocking piece; the manual handle 4 can drive the gate 2 to move laterally along the gate mounting channel. When the gate 2 moves laterally, the connecting rod 5 drives the blocking piece to move upward or downward along the side wall of the protective body 1. A motor 7 is set at the port of the gate mounting channel away from the fluid channel, and the driving end of the motor 7 is connected to the gate 2.

[0062] In this embodiment, the motor is a DC push rod motor, which is fixed to the side of the main body with 4 screws. The push rod of the DC push rod motor is connected to the thread on the gate plate, and an oil seal is installed on the push rod of the push rod motor.

[0063] Under the action of the motor 7, the motor 7 can be remotely operated to achieve the movement of the gate 2 and realize remote control. There is no need for human beings to stay next to the equipment for a long time, which reduces on-site labor and manual work intensity and reduces the risk of personnel staying in high-risk areas at the wellhead for a long time.

[0064] Example 7

[0065] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, a fluid passage defined within the protective body 1, and a gate 2 disposed therein for sealing the fluid passage. A leakage hole 6 is defined on the sidewall of the protective body 1, communicating with the fluid passage and located below the gate 2. A sealing member is disposed on the exterior of the protective body 1 for sealing the leakage hole 6. The sealing member is a sliding sleeve 3 that can move up and down along the sidewall of the protective body 1.

[0066] Example 8

[0067] This embodiment discloses a splash prevention device for wellbore liquid level detection, comprising a protective body 1, wherein a fluid passage is defined within the protective body 1 and a gate 2 is disposed within the protective body 1 for sealing the fluid passage. A leakage hole 6 is defined on a side wall of the protective body 1, communicating with the fluid passage and located below the gate 2. A sealing member is disposed on the outside of the protective body 1 for sealing the leakage hole 6. Two leakage holes 6 are symmetrically disposed.

[0068] Specifically, this embodiment also discloses a method for using a splash-proof device for detecting a wellbore liquid level, see Figure 1 The upper part of the device is connected to the wellbore liquid level detection equipment through threads. The lower part is connected to the wellbore detection port through threads. When the thread specifications do not match the main body thread, a reducer is used for connection.

[0069] The specific working process includes the following steps:

[0070] See also Figures 1 to 2 , is the measurement status:

[0071] The gate 2 is operated by the motor 7 or the manual handle 4 to open the internal passage of the protective body. Figure 1 The middle gate moves to the right), and the sliding sleeve 3 is driven by the connecting rod 5 to move upward to close the drain hole 6. At this time, the liquid level detection equipment connected to the upper part can perform measurement.

[0072] See also Figures 3 and 4 , standby status:

[0073] After the measurement is completed, the gate 2 is operated by the motor 7 or the manual handle 4 to close the internal channel of the protective body 1 ( Figure 2 The middle gate moves to the left), at this time, the end of the gate 2 passes through the fluid channel and extends into the gate groove, and the sliding sleeve 3 is driven by the connecting rod 5 to move downward to open the drain hole. After that, if there is fluid splashing out of the wellbore, it can be discharged through the drain hole 6.

[0074] In this embodiment, no matter what state is in, there are two operating modes. The first is to manually switch the state through the manual handle 4, and the second is to switch the state through the motor 7 actuator. Before measurement, the gate 2 is opened and the leakage hole 6 is closed. After the measurement is completed, the gate 2 is closed and the leakage hole 6 is opened. The equipment is in standby state, and this cycle is repeated to achieve liquid level measurement.

[0075] The device disclosed in the embodiments of the present invention can be installed independently at a liquid level monitoring port or integrated into the front end of a liquid level detection device. Once installed, it can be operated locally or remotely for liquid level detection without manual operation, and can be installed and maintained permanently. The acoustic wave detection channel in the device is automatically opened and closed, and can also be opened and closed manually when necessary.

[0076] The acoustic channel is automatically or manually opened within a short period of time at the start of testing and automatically or manually closed after testing is complete. During extended periods of non-testing, any fluid splashes are blocked by the closed gate and leak out through the side holes, preventing contamination or damage to the testing equipment. The device of the present invention is a key step in achieving truly remote automatic liquid level detection, significantly protecting testing equipment and reducing operator risk and labor intensity, making it more practical and convenient.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways.

[0078] Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A splash-proof device for detecting liquid level in a wellbore, characterized in that: It comprises a protective body (1), a fluid passage is provided inside the protective body (1), a gate plate (2) is provided inside the protective body (1), and the gate plate (2) can block the fluid passage; A leakage hole (6) is provided on the side wall of the protective body (1), the leakage hole (6) being connected to the fluid channel, the leakage hole (6) being located below the gate plate (2), and a blocking piece is provided on the outside of the protective body (1), the blocking piece being used to block the leakage hole (6).

2. The anti-splashing device for wellbore liquid level detection according to claim 1, characterized in that: A gate installation channel is provided inside the protective body (1), the gate installation channel is located on the side of the fluid channel, and the gate (2) is located inside the gate installation channel; The gate plate (2) can move along the gate plate installation channel, and when the gate plate (2) extends into the interior of the fluid channel, the gate plate (2) can block the fluid channel.

3. The anti-splashing device for wellbore liquid level detection according to claim 2, characterized in that: The gate installation channel is vertically distributed with the fluid channel.

4. The anti-splashing device for wellbore liquid level detection according to claim 3, characterized in that: A gate plate groove symmetrical to the gate plate installation channel is provided inside the protective body (1), and the gate plate (2) can extend into the gate plate groove after passing through the fluid channel transversely.

5. The anti-splashing device for wellbore liquid level detection according to claim 3, characterized in that: The side wall of the gate installation channel passes through a manual handle (4), the end of the manual handle (4) extending into the gate installation channel is connected to the gate (2), the manual handle (4) is located outside the gate installation channel and is rotatably connected to a connecting rod (5), and the end of the connecting rod (5) away from the manual handle (4) is rotatably connected to a blocking member; The manual handle (4) can drive the gate plate (2) to move laterally along the gate plate installation channel. When the gate plate (2) moves laterally, the connecting rod (5) drives the blocking piece to move upward or downward along the side wall of the protective body (1).

6. The anti-splashing device for wellbore liquid level detection according to claim 5, characterized in that: An electric motor (7) is provided at a port of the gate installation channel away from the fluid channel, and a driving end of the electric motor (7) is connected to the gate (2).

7. The anti-splashing device for wellbore liquid level detection according to claim 6, characterized in that: The electric motor (7) is a DC push rod motor.

8. The anti-splashing device for wellbore liquid level detection according to claim 1, characterized in that: The blocking member is a sliding sleeve (3), and the sliding sleeve (3) is capable of moving up and down along the side wall of the protective body (1).

9. The anti-splashing device for wellbore liquid level detection according to claim 1, characterized in that: Two leakage holes (6) are symmetrically provided.

10. The method for using the anti-splashing device for wellbore liquid level detection according to claim 1, characterized in that: The following steps are involved: The gate (2) is opened to allow the fluid passage inside the protective body (1) to be connected, and the blocking member blocks the leakage hole (6). At this time, the liquid level detection device to be used is installed on the upper end of the protective body (1) to measure the liquid level; After the measurement is completed, the gate (2) blocks the fluid channel, the blocking member is moved, and the leakage hole (6) is opened. If fluid splashes out of the wellbore, the fluid flows out through the leakage hole (6).

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