Drilling fluid underground leakage detection device

Abstract

The utility model discloses a drilling fluid underground leakage detection device, and belongs to the technical field of drilling detection. A drilling fluid underground leakage detection device comprises a controller, an alarm, a shell, a heating element, a first thermistor and a second thermistor. The controller is electrically connected with the alarm, the heating element, the first thermistor and the second thermistor; the heating element, the first thermistor and the second thermistor are all fixedly installed in the shell, a liquid storage cavity is formed in the shell, and the heating element, the first thermistor and the second thermistor are all installed in the liquid storage cavity. The heating element, the first thermistor and the second thermistor are arranged in the liquid storage cavity, the heating element is used for heating water in the liquid storage cavity, the first thermistor and the second thermistor are used for detecting the heat exchange efficiency between the drilling fluid and the device, and underground leakage of the drilling fluid is detected.

Description

Technical Field

[0001] This application relates to the technical field of drilling detection, and more specifically, to a device for detecting underground leakage of drilling fluid. Background Technique

[0002] In oil drilling operations, drilling fluid plays a crucial role. It is not only used to cool the drill bit and carry cuttings, but also plays important roles such as balancing formation pressure and preventing blowouts. However, during the underground circulation of drilling fluid, leakage may occur due to complex geological structures, equipment aging, or improper operation. This not only leads to waste of drilling fluid resources, but may also cause environmental pollution and safety accidents.

[0003] After retrieving the patent document with the existing publication number CN218584277U, a device for detecting leakage of drilling fluid for drilling is provided. This device collects images of the drill pipe through an optical camera to detect cracks on the surface of the drill pipe and avoid leakage of drilling fluid from the cracks in the drill pipe.

[0004] Drilling fluid can not only leak from the cracks in the drill pipe, but also leak into the formation, causing changes in the bottom hole pressure, resulting in unstable and collapsed wellbores, and even potentially inducing accidents such as water overflow and blowout. To solve the above problems, we propose a device for detecting underground leakage of drilling fluid. Utility Model Content

[0005] 1. Technical Problems to be Solved

[0006] The purpose of this application is to provide a device for detecting underground leakage of drilling fluid to solve the problems raised in the above background technique.

[0007] 2. Technical Solutions

[0008] This application is implemented through the following technical solutions:

[0009] A device for detecting underground leakage of drilling fluid includes a controller, an alarm, a housing, a heating element, a first thermistor, and a second thermistor;

[0010] The controller is electrically connected to the alarm, the heating element, the first thermistor, and the second thermistor. The housing is installed inside the drill. The heating element, the first thermistor, and the second thermistor are all fixedly installed inside the housing. The heating element is arranged below the first thermistor, and the first thermistor is arranged below the second thermistor.

[0011] As an optional solution of the technical solution of this application document, a liquid storage cavity is opened inside the housing, and the heating element, the first thermistor, and the second thermistor are all installed in the liquid storage cavity.

[0012] As an alternative solution to the technical solution of this application document, a wire embedding groove is provided in the middle of the housing, a wire is provided in the wire embedding groove, and the controller is electrically connected to the heating element, the first thermistor, and the second thermistor through the wire.

[0013] As an alternative solution to the technical solution of this application document, a motor is fixedly installed at the bottom of the housing, the motor is electrically connected to the controller, a sealing cover is fixedly connected to the outside of the output end of the motor, the sealing cover is rotatably connected to the housing, and a scraper is slidably connected to the side of the housing, and the scraper is fixedly connected to the sealing cover.

[0014] As an alternative solution to the technical solution of this application document, a protective cover is slidably sleeved on the outside of the sealing cover, and the protective cover is elastically connected to the sealing cover through an elastic element.

[0015] As an alternative solution to the technical solution of this application document, the bottom of the protective cover is arc-shaped.

[0016] As an alternative solution to the technical solution of this application document, the controller is electrically connected to a remote communication module, and the remote communication module supports a wireless communication method.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] 1. In this application, by arranging a heating element, a first thermistor, and a second thermistor in the liquid storage cavity, the heating element is used to heat the water in the liquid storage cavity, and the first thermistor and the second thermistor are used to detect the heat exchange efficiency between the drilling fluid and this device. When the drilling fluid leaks to the bottom of the well and the flow rate decreases, an alarm is issued through the alarm to remind the staff to take timely remedial measures, avoiding the instability and collapse of the wellbore, and even possibly inducing accidents such as water overflow and blowout.

[0020] 2. In this application, by installing a motor at the bottom of the housing, the motor can be used to drive the scraper to rotate, cleaning the mud attached to the housing, avoiding the mud from affecting the heat exchange efficiency between this device and the drilling fluid, and increasing the reliability of this device. Description of the drawings

[0021] Figure 1 is a schematic circuit connection diagram of a drilling fluid bottom leakage detection device;

[0022] Figure 2 is a schematic diagram of the housing structure of a drilling fluid bottom leakage detection device;

[0023] Figure 3 is a schematic diagram of the internal structure of the housing of a drilling fluid bottom leakage detection device;

[0024] In the figure: 1. Housing; 101. Liquid storage chamber; 102. Cable groove; 2. Heating element; 3. First thermistor; 4. Second thermistor; 5. Motor; 6. Sealing cover; 7. Scraper; 8. Protective cover. Detailed implementation

[0025] Next, the technical solution of the present application will be clearly and completely described in conjunction with the accompanying drawings.

[0026] Please refer to Figure 1 , the present application provides a technical solution:

[0027] A device for detecting underground leakage of drilling fluid includes a controller, an alarm, a housing 1, a heating element 2, a first thermistor 3, and a second thermistor 4; the controller is electrically connected to the alarm, the heating element 2, the first thermistor 3, and the second thermistor 4.

[0028] As Figure 2 And Figure 3 shown, the heating element 2, the first thermistor 3, and the second thermistor 4 are all fixedly installed inside the housing 1. A liquid storage chamber 101 is provided inside the housing 1, and the heating element 2, the first thermistor 3, and the second thermistor 4 are all installed in the liquid storage chamber 101; the housing 1 is made of copper material, water is stored in the liquid storage chamber 101, the heating element 2 is arranged below the first thermistor 3, and the first thermistor 3 is arranged below the second thermistor 4.

[0029] A cable groove 102 is provided in the middle of the housing 1, and a wire is provided in the cable groove 102. The controller is electrically connected to the heating element 2, the first thermistor 3, and the second thermistor 4 through the wire. When the device is in use, the housing 1 is fixed in the drilling through the drilling inlet, and the depth of the housing 1 immersed in the drilling fluid is not less than 0.5 m; the controller controls the heating element 2 to heat the water in the liquid storage chamber 101 at a set power through the wire, and the heat of the water body in the liquid storage chamber 101 will exchange heat with the drilling fluid through the housing 1, so that there is a temperature difference in the water body at the first thermistor 3 and the second thermistor 4. The greater the flow rate of the drilling fluid, the greater the temperature difference in the water body at the first thermistor 3 and the second thermistor 4. The controller collects the electrical signals at the ends of the first thermistor 3 and the second thermistor 4, and compares the electrical signals at the ends of the first thermistor 3 and the second thermistor 4. When the electrical signals at the ends of the first thermistor 3 and the second thermistor 4 are lower than the set threshold, it can be judged that the flow rate of the drilling fluid is too low, and there is a possibility that the drilling fluid in the drilling leaks into the soil layer. The logic circuit inside the controller will control the alarm to send out an alarm signal to remind the staff to take remedial measures in time.

[0030] Moreover, a remote communication module is provided inside the device. The remote communication module supports wireless communication methods. The controller can transmit the electrical signals of the first thermistor 3 and the second thermistor 4 collected through the remote communication module to external devices for data storage, which is used to analyze the conditions of the internal drilling construction.

[0031] At the same time, a motor 5 is fixedly installed at the bottom of the housing 1. The motor 5 is electrically connected to the controller. A sealing cover 6 is fixedly connected to the outside of the output end of the motor 5. The sealing cover 6 is rotatably connected to the housing 1. A scraper 7 is slidably connected to the side of the housing 1. The scraper 7 is fixedly connected to the sealing cover 6. The controller can drive the motor 5 to rotate at a low speed and drive the scraper 7 to slide on the surface of the housing 1 to remove the mud on the surface of the scraper 7, avoiding the influence of the mud on the heat exchange efficiency between the drilling fluid and the water body in the housing 1 and increasing the stability of the device.

[0032] A protective cover 8 is slidably sleeved outside the sealing cover 6. The protective cover 8 is elastically connected to the sealing cover 6 through an elastic element. The bottom of the protective cover 8 is arc-shaped. In this design scheme, when the drilling fluid carries soil and debris and flows upward and collides with the sealing cover 6, it can be buffered by the elastic element to avoid damage to the device and increase the service life of the device.

Claims

1. A device for detecting underground leakage of drilling fluid, characterized in that: It includes a controller, an alarm, a housing (1), a heating element (2), a first thermistor (3), and a second thermistor (4); The controller is electrically connected to the alarm, the heating element (2), the first thermistor (3), and the second thermistor (4). The housing (1) is installed inside the drill. The heating element (2), the first thermistor (3), and the second thermistor (4) are all fixedly installed inside the housing (1). The heating element (2) is arranged below the first thermistor (3), and the first thermistor (3) is arranged below the second thermistor (4).

2. The underground leakage detection device for drilling fluid according to claim 1, wherein: A liquid storage cavity (101) is formed inside the housing (1), and the heating element (2), the first thermistor (3), and the second thermistor (4) are all installed in the liquid storage cavity (101).

3. The underground leakage detection device for drilling fluid according to claim 1, wherein: A wire embedding groove (102) is formed in the middle of the housing (1), and a wire is arranged in the wire embedding groove (102). The controller is electrically connected to the heating element (2), the first thermistor (3), and the second thermistor (4) through the wire.

4. The underground leakage detection device for drilling fluid according to claim 1, wherein: A motor (5) is fixedly installed at the bottom of the housing (1). The motor (5) is electrically connected to the controller. A sealing cover (6) is fixedly connected to the outside of the output end of the motor (5). The sealing cover (6) is rotationally connected to the housing (1). A scraper (7) is slidably connected to the side of the housing (1), and the scraper (7) is fixedly connected to the sealing cover (6).

5. The underground leakage detection device for drilling fluid according to claim 4, characterized in that: A protective cover (8) is slidably sleeved on the outside of the sealing cover (6), and the protective cover (8) is elastically connected to the sealing cover (6) through an elastic element.

6. The underground leakage detection device for drilling fluid according to claim 5, characterized in that: The bottom of the protective cover (8) is arc-shaped.

7. The underground leakage detection device for drilling fluid according to claim 1, wherein: The controller is electrically connected to a remote communication module, and the remote communication module supports wireless communication methods.

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