Constant-temperature online monitoring equipment for rheological property of drilling fluid

Abstract

The utility model discloses a drilling fluid rheological property constant temperature on-line monitoring device, which comprises a liquid inlet pipe, a constant temperature heat conduction oil cavity and a core measurement structure, the bottom end of one side of the constant temperature heat conduction oil cavity is fixedly connected with the liquid inlet pipe, and the middle part of the liquid inlet pipe is fixedly connected with an anti-explosion pneumatic ball liquid inlet valve; a pressure relief pipe is arranged on one side of the bottom end of the anti-explosion pneumatic ball liquid inlet valve, a liquid drainage pipe is fixedly connected to one side of the constant-temperature heat conduction oil cavity, a liquid drainage opening is formed in the bottom end of the liquid drainage pipe, a vertical pipe is fixedly connected to the middle of the bottom end of the constant-temperature heat conduction oil cavity, and an anti-explosion pressure transmitter is fixedly connected to the middle of the vertical pipe. And an anti-explosion pneumatic ball liquid outlet valve is arranged below the middle part of the vertical pipe. An explosion-proof servo motor is adopted, control is accurate, real-time feedback is achieved, a non-contact magnetic sensitive angle sensor is adopted, abrasion is avoided, current signals are output in real time, the precision is ultrahigh, hairsprings commonly used in precision instruments and clocks are used instead, the load is low, the precision is high, a gas bearing is used instead, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of constant temperature online monitoring technology, specifically a constant temperature online monitoring device for drilling fluid rheology. Background Technology

[0002] Drilling fluid is a general term for various circulating fluids that fulfill the needs of drilling operations through multiple functions. It is considered the lifeblood of drilling, also known as borehole flushing fluid. Drilling fluids can be classified by composition into water, mud, clay-free flushing fluid, emulsions, foam, and compressed air. Water is the earliest type of drilling fluid used; it requires no treatment, is convenient to use, and is suitable for areas with intact rock formations and abundant water sources. Mud is a widely used drilling fluid, primarily suitable for unstable rock formations with loose, fractured, easily collapsing, or water-swelling and spalling characteristics. Current drilling fluid technology monitors the fluid at its circulating temperature during use, making it impossible to maintain a constant temperature, leading to errors in the monitoring results. Utility Model Content

[0003] The purpose of this invention is to provide a constant temperature online monitoring device for drilling fluid rheology. Traditional drilling fluid flow is monitored at the circulating temperature, which cannot maintain constant temperature monitoring operation, resulting in errors after monitoring.

[0004] To achieve the above objectives, a constant-temperature online monitoring device for drilling fluid rheology is provided, comprising: an inlet pipe, a constant-temperature heat-conducting oil chamber, and a core measuring structure. An inlet pipe is fixedly connected to the bottom of one side of the constant-temperature heat-conducting oil chamber. An explosion-proof pneumatic ball inlet valve is fixedly connected to the middle of the inlet pipe. A pressure relief pipe is provided on one side of the bottom of the explosion-proof pneumatic ball inlet valve. A drain pipe is fixedly connected to one side of the constant-temperature heat-conducting oil chamber. A drain port is provided at the bottom of the drain pipe. A vertical pipe is fixedly connected to the middle of the bottom of the constant-temperature heat-conducting oil chamber. An explosion-proof... An explosion-proof pressure transmitter is provided. An explosion-proof pneumatic ball outlet valve is installed below the middle of the vertical pipe. A measuring chamber is provided on the front side of the constant temperature heat conduction oil chamber. An explosion-proof temperature liquid transmitter is fixedly connected to one side of the bottom of the constant temperature heat conduction oil chamber. An explosion-proof temperature oil transmitter is provided between the liquid inlet pipe and the constant temperature heat conduction oil chamber. A core measuring structure is provided at the top of the constant temperature heat conduction oil chamber. The core measuring structure includes an inner cylinder and a transmission connection device. An inner cylinder connecting shaft is rotatably connected inside the transmission connection device. The inner cylinder is provided at the bottom end of the inner cylinder connecting shaft.

[0005] According to the drilling fluid rheology constant temperature online monitoring device, a magnetic head connection device is fixedly connected to the top end of the inner cylinder connecting shaft, a magnetic head and a fixing device are fixedly connected to the top end of the magnetic head connection device, and a magnetic angle sensor is fixedly connected to the top end of the magnetic head and the fixing device.

[0006] According to the drilling fluid rheology constant temperature online monitoring device, a pulley is fixedly connected to the upper middle part of the transmission connection device, and an explosion-proof servo motor transmission belt is sleeved on the outside of the pulley.

[0007] According to the drilling fluid rheology constant temperature online monitoring device, a gas bearing fixing device is provided at the top of the transmission connection device, and a gas bearing is fixedly connected to the inner side of the gas bearing fixing device.

[0008] According to the aforementioned drilling fluid rheology constant temperature online monitoring device, the gas bearing and the inner cylinder connecting shaft are rotatably coupled.

[0009] According to the aforementioned drilling fluid rheology constant temperature online monitoring device, a spiral spring is provided between the magnetic head and fixing device and the magnetic head connecting device.

[0010] According to the aforementioned drilling fluid rheology constant temperature online monitoring device, the upper surface of the constant temperature heat conduction oil cavity is provided with an overflow surface, an overflow cavity is opened on one side of the top of the constant temperature heat conduction oil cavity, and an explosion-proof electric heating rod is provided on the inner wall of the constant temperature heat conduction oil cavity.

[0011] According to the aforementioned drilling fluid rheology constant temperature online monitoring device, the inner wall of the transmission connection device is fitted with an outer cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model is equipped with: an explosion-proof pneumatic ball inlet valve, a measuring chamber, an overflow chamber, an explosion-proof pneumatic ball outlet valve, and an explosion-proof electric heating rod. The fluid sample is drawn by an external pump and enters the measuring chamber through the inlet pipe and the explosion-proof pneumatic ball inlet valve. After the measuring chamber is full, the fluid overflows from the overflow surface into the overflow chamber and is then discharged through the drain pipe and drain port. Note that the explosion-proof pneumatic ball outlet valve is closed at this time, and the liquid level will stabilize at the overflow surface height after a certain period of time to await detection. At the same time, the controller controls the explosion-proof electric heating rod to control the oil temperature (heating and cooling) to a suitable temperature. The oil evenly transfers heat to the liquid to be tested, adding a constant temperature structure to keep the fluid to be tested in a constant temperature state throughout the measurement process.

[0014] 2. This utility model adopts an explosion-proof servo motor for precise control and real-time feedback, a non-contact magnetic angle sensor for wear-free operation, real-time current signal output for ultra-high precision, and replaces the hairspring commonly used in precision instruments and watches for low load and high precision. It also uses a gas bearing for extremely low friction and longer lifespan.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a cross-sectional front view of a drilling fluid rheology constant temperature online monitoring device according to this utility model;

[0018] Figure 2 This is a side view of the isothermal heat-conducting oil cavity interface of an online monitoring device for drilling fluid rheology according to this utility model;

[0019] Figure 3 This is an enlarged view of the core measuring structure of a constant-temperature online monitoring device for drilling fluid rheology according to this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the core measuring structure of a constant-temperature online monitoring device for drilling fluid rheology according to this utility model.

[0021] In the diagram: 1. Inlet pipe; 2. Explosion-proof pneumatic ball inlet valve; 3. Measuring chamber; 4. Overflow surface; 5. Overflow cavity; 6. Constant temperature heat transfer oil cavity; 7. Drain pipe; 8. Explosion-proof pressure transmitter; 9. Explosion-proof temperature oil transmitter; 10. Explosion-proof pneumatic ball outlet valve; 11. Drain port; 12. Core measuring structure; 13. Pressure relief pipe; 14. Explosion-proof electric heating rod; 15. Explosion-proof temperature liquid transmitter; 16. Magnetic angle sensor; 17. Magnetic head and fixing device; 18. Hairspring; 19. Magnetic head connecting device; 20. Gas bearing; 21. Gas bearing fixing device; 22. Explosion-proof servo motor drive belt; 23. Inner cylinder connecting shaft; 24. Transmission connecting device; 25. Outer cylinder; 26. Inner cylinder body. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution: a drilling fluid rheology constant temperature online monitoring device, including: an inlet pipe 1, a constant temperature heat-conducting oil chamber 6, and a core measuring structure 12. The inlet pipe 1 is fixedly connected to the bottom of one side of the constant temperature heat-conducting oil chamber 6. An explosion-proof pneumatic ball inlet valve 2 is fixedly connected to the middle of the inlet pipe 1. The explosion-proof pneumatic ball inlet valve 2 discharges fluid from the measuring chamber 3, opens the explosion-proof pneumatic ball outlet valve 10, and restarts the cycle, waiting for the next measurement to begin. A pressure relief pipe 13 is provided on one side of the bottom of the explosion-proof pneumatic ball inlet valve 2. A drain pipe 7 is fixedly connected to one side of the constant temperature heat-conducting oil chamber 6, through which fluid is discharged. Discharge from port 11; note that the explosion-proof pneumatic ball outlet valve 10 is closed at this time. A drain port 11 is located at the bottom of the drain pipe 7. A vertical pipe is fixedly connected to the middle of the bottom of the constant-temperature heat-conducting oil chamber 6. An explosion-proof pressure transmitter 8 is fixedly connected to the middle of the vertical pipe. An explosion-proof pneumatic ball outlet valve 10 is located below the middle of the vertical pipe. A measuring chamber 3 is located on the front side of the constant-temperature heat-conducting oil chamber 6. Fluid enters the measuring chamber 3 through the inlet pipe 1 and the explosion-proof pneumatic ball inlet valve 2. After the measuring chamber 3 is full, fluid overflows from the overflow surface 4 to the overflow chamber 5. An explosion-proof temperature transmitter 15 is fixedly connected to one side of the bottom of the constant-temperature heat-conducting oil chamber 6. The oil evenly transfers heat to the object to be tested. Liquid is used to ensure that the fluid in the measuring chamber 3 is kept at a constant temperature as designed. Explosion-proof pressure transmitter 8, explosion-proof temperature oil transmitter 9, and explosion-proof temperature liquid transmitter 15 monitor the fluid temperature and pressure (liquid level) in the measuring chamber 3 in real time. An explosion-proof temperature oil transmitter 9 is installed between the inlet pipe 1 and the constant-temperature heat-conducting oil chamber 6. A core measuring structure 12 is installed at the top of the constant-temperature heat-conducting oil chamber 6. The core measuring structure 12 includes an inner cylinder 26 and a transmission connection device 24. An inner cylinder connecting shaft 23 is rotatably connected inside the transmission connection device 24. The inner cylinder 26 is installed at the bottom end of the inner cylinder connecting shaft 23. The constant-temperature heat-conducting oil chamber 6... An overflow surface 4 is provided on the upper surface. The liquid level will stabilize at the height of the overflow surface 4 after a certain period of time to await detection. An overflow cavity 5 is provided on one side of the top of the constant temperature heat conduction oil cavity 6. An explosion-proof electric heating rod 14 is provided on the inner wall of the constant temperature heat conduction oil cavity 6. The constant temperature heat conduction oil cavity 6 is filled with heat conduction oil and is circulated and stirred by a pump. At the same time, the explosion-proof electric heating rod 14 is controlled by a controller to control the oil temperature (heating and cooling) to a suitable temperature. An outer cylinder 25 is sleeved on the inner wall of the transmission connection device 24. When the outer cylinder 25 is rotated, a torque will be generated due to the presence of viscous fluid (such as drilling fluid) in the gap between it and the inner cylinder 26.

[0024] A magnetic head connecting device 19 is fixedly connected to the top of the inner cylinder connecting shaft 23. A magnetic head and fixing device 17 is fixedly connected to the top of the magnetic head connecting device 19. A magnetic angle sensor 16 is fixedly connected to the top of the magnetic head and fixing device 17. Under stable rotation speed and torque, a fixed angle is generated. After being read by the magnetic angle sensor 16, the angle is output. A pulley is fixedly connected to the upper middle part of the transmission connecting device 24. An explosion-proof servo motor transmission belt 22 is sleeved on the outside of the pulley. An explosion-proof pneumatic ball liquid inlet valve 2 stops the liquid intake. The explosion-proof servo motor drives the explosion-proof servo motor transmission belt 22, the transmission connecting device 24, and the outer cylinder 25 as a whole. A gas bearing fixing device 21 is set at the top of the transmission connecting device 24. A gas bearing 20 is fixedly connected to the inner side of the gas bearing fixing device 21. The gas bearing 20 and the inner cylinder connecting shaft 23 rotate in cooperation. A hairspring 18 is set between the magnetic head and fixing device 17 and the magnetic head connecting device 19.

[0025] Working principle: During use, the fluid sample is drawn by the external pump of the equipment and enters the measuring chamber 3 through the inlet pipe 1 and the explosion-proof pneumatic ball inlet valve 2. After the measuring chamber 3 is full of fluid, it will overflow from the overflow surface 4 to the overflow chamber 5, and then be discharged through the drain pipe 7 and the drain port 11. Note that the explosion-proof pneumatic ball outlet valve 10 is closed at this time.

[0026] Following the above steps, the fluid will circulate within the entire equipment, and the liquid level will stabilize at the overflow surface 4 height after a certain period of time, awaiting detection. The constant temperature heat transfer oil chamber 6 is filled with heat transfer oil, which is circulated and stirred by a pump. At the same time, the explosion-proof electric heating rod 14 is controlled by the controller to control the oil temperature (heating and cooling) to a suitable temperature. The oil evenly transfers heat to the liquid to be tested, ensuring that the fluid in the measuring chamber 3 is in a constant temperature state as designed. The explosion-proof pressure transmitter 8, explosion-proof temperature oil transmitter 9, and explosion-proof temperature liquid transmitter 15 will monitor the fluid temperature and pressure (liquid level height) in the measuring chamber 3 in real time to ensure that it is in the optimal state for testing.

[0027] When the explosion-proof pneumatic ball inlet valve 2 is closed, the liquid intake stops. The explosion-proof servo motor drives the explosion-proof servo motor transmission belt 22, transmission connection device 24, and outer cylinder 25 as a whole, rotating at the designed speed. When the outer cylinder 25 rotates, due to the presence of viscous fluid (such as drilling fluid) in the gap between it and the inner cylinder 26, a torque is generated, driving the inner cylinder 26, inner cylinder connecting shaft 23, magnetic head connection device 19, spiral spring 18, magnetic head and fixing device 17 as a whole, generating a fixed angle under stable speed and torque. After being read by the magnetic angle sensor 16, the angle is output. The explosion-proof pneumatic ball inlet valve 2 is closed to drain the fluid in the measuring chamber 3, and the explosion-proof pneumatic ball outlet valve 10 is opened to restart the cycle, waiting for the next round of measurement to begin.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A constant-temperature online monitoring device for drilling fluid rheology, comprising: The inlet pipe (1), the constant temperature heat-conducting oil chamber (6), and the core measuring structure (12) are characterized in that: an inlet pipe (1) is fixedly connected to the bottom end of one side of the constant temperature heat-conducting oil chamber (6); an explosion-proof pneumatic ball inlet valve (2) is fixedly connected to the middle of the inlet pipe (1); a pressure relief pipe (13) is provided on one side of the bottom end of the explosion-proof pneumatic ball inlet valve (2); a drain pipe (7) is fixedly connected to one side of the constant temperature heat-conducting oil chamber (6); a drain port (11) is opened at the bottom end of the drain pipe (7); a vertical pipe is fixedly connected to the middle of the bottom end of the constant temperature heat-conducting oil chamber (6); an explosion-proof pressure transmitter (8) is fixedly connected to the middle of the vertical pipe; and a device is installed below the middle of the vertical pipe. An explosion-proof pneumatic ball outlet valve (10) is provided. A measuring chamber (3) is provided on the front side of the constant temperature heat conduction oil chamber (6). An explosion-proof temperature liquid transmitter (15) is fixedly connected to one side of the bottom end of the constant temperature heat conduction oil chamber (6). An explosion-proof temperature oil transmitter (9) is provided between the liquid inlet pipe (1) and the constant temperature heat conduction oil chamber (6). A core measuring structure (12) is provided at the top of the constant temperature heat conduction oil chamber (6). The core measuring structure (12) includes: an inner cylinder (26) and a transmission connection device (24). An inner cylinder connecting shaft (23) is rotatably connected inside the transmission connection device (24). The inner cylinder (26) is provided at the bottom end of the inner cylinder connecting shaft (23).

2. The drilling fluid rheology constant temperature online monitoring device as described in claim 1, characterized in that: The top end of the inner cylinder connecting shaft (23) is fixedly connected to a magnetic head connecting device (19), the top end of the magnetic head connecting device (19) is fixedly connected to a magnetic head and fixing device (17), and the top end of the magnetic head and fixing device (17) is fixedly connected to a magnetic angle sensor (16).

3. The drilling fluid rheology constant temperature online monitoring device as described in claim 1, characterized in that: A pulley is fixedly connected to the upper middle part of the transmission connection device (24), and an explosion-proof servo motor transmission belt (22) is sleeved on the outside of the pulley.

4. The drilling fluid rheology constant temperature online monitoring device as described in claim 1, characterized in that: The top end of the transmission connection device (24) is provided with a gas bearing fixing device (21), and a gas bearing (20) is fixedly connected to the inner side of the gas bearing fixing device (21).

5. The drilling fluid rheology constant temperature online monitoring device as described in claim 4, characterized in that: The gas bearing (20) and the inner cylinder connecting shaft (23) are rotatably coupled.

6. The drilling fluid rheology constant temperature online monitoring device as described in claim 2, characterized in that: A hairspring (18) is provided between the magnetic head and fixing device (17) and the magnetic head connecting device (19).

7. The drilling fluid rheology constant temperature online monitoring device as described in claim 1, characterized in that: The upper surface of the constant temperature heat conduction oil cavity (6) is provided with an overflow surface (4), and an overflow cavity (5) is opened on one side of the top end of the constant temperature heat conduction oil cavity (6). An explosion-proof electric heating rod (14) is provided on the inner wall of the constant temperature heat conduction oil cavity (6).

8. The online monitoring device for the rheological properties of drilling fluid as described in claim 1, characterized in that: The inner wall of the transmission connection device (24) is fitted with an outer cylinder (25).

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