Drilling fluid rheological property on-line monitoring equipment

Abstract

The utility model relates to the technical field of petroleum drilling and production, in particular to drilling fluid rheological property on-line monitoring equipment which comprises a liquid inlet pipe, a first anti-explosion pneumatic ball valve, a measuring chamber, an overflow chamber, a constant-temperature pipe, a liquid discharge pipe, a second anti-explosion pneumatic ball valve, a liquid discharge pipe, a core measuring piece, an anti-explosion pressure transmitter and an anti-explosion temperature transmitter. When the second anti-explosion pneumatic ball valve is closed, the first anti-explosion pneumatic ball valve is opened, fluid enters the measuring chamber through the liquid inlet pipe and the first anti-explosion pneumatic ball valve, after the measuring chamber is filled with the fluid, the fluid overflows to the overflow chamber from the overflow port and then is discharged through the liquid discharge pipe and the liquid discharge port, and the liquid level can be stabilized at the height of the overflow port after a certain time. When liquid is taken, the first anti-explosion pneumatic ball valve is closed, liquid taking is stopped, at the moment, the temperature and the pressure intensity of the fluid in the measuring chamber are monitored in real time through the core measuring piece, the anti-explosion pressure transmitter and the anti-explosion temperature transmitter, and a detection result can be obtained immediately.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling and production technology, and in particular to an online monitoring device for drilling fluid rheology. Background Technology

[0002] A six-speed rotational viscometer is an instrument for measuring the rheological parameters of drilling fluids (or other fluids). Its measurement principle is as follows: the liquid is placed in an annular space between two concentric circles. A motor drives the outer cylinder (rotor) to rotate at a constant speed via a transmission device. Due to the viscosity of the liquid being measured, a certain torque is generated on the inner cylinder (stator), causing the inner cylinder (stator), connected to a torsion spring, to rotate at an angle. The magnitude of this angle is proportional to the viscosity of the liquid; thus, the measurement of the liquid's viscosity is converted into the measurement of the inner cylinder's rotation angle.

[0003] Currently, existing manual six-speed rotational viscometers lack temperature control measures, and the experimental testing time is about 1 hour, which is relatively long and inefficient. Utility Model Content

[0004] The purpose of this invention is to provide an online monitoring device for drilling fluid rheology, which aims to solve the problems of existing online monitoring devices for drilling fluid rheology having an experimental testing time of about 1 hour, resulting in long testing time and low testing efficiency.

[0005] To achieve the above objectives, this utility model provides an online monitoring device for drilling fluid rheology, including an inlet pipe, a first explosion-proof pneumatic ball valve, a measuring chamber, an overflow chamber, a thermostatic pipe, a drain pipe, a second explosion-proof pneumatic ball valve, a core measuring component, an explosion-proof pressure transmitter, and an explosion-proof temperature transmitter; the overflow chamber is located outside the measuring chamber, and the measuring chamber has an overflow port located at the top of the measuring chamber; the thermostatic pipe is located inside the measuring chamber; the core measuring component is located on one side of the measuring chamber and the overflow chamber; and the drain pipe is connected to the... The overflow chamber is connected to and connected to the measuring chamber, and is located between the overflow chamber and the measuring chamber. The drain pipe has a drain port located at the bottom of the drain pipe. The inlet pipe is connected to the measuring chamber and passes through the overflow chamber. The first explosion-proof pneumatic ball valve is located on one side of the inlet pipe. The second explosion-proof pneumatic ball valve is located between the measuring chamber and the drain pipe. The explosion-proof pressure transmitter is located at the bottom of the measuring chamber. The explosion-proof temperature transmitter is located on the side of the measuring chamber near the explosion-proof pressure transmitter.

[0006] The core measuring components include a magnetic angle sensor, a magnetic head and fixing component, a hairspring, a magnetic head connector, a gas bearing, an explosion-proof servo motor drive belt, a transmission connector, an outer cylinder, and an inner cylinder. The magnetic head and fixing component are located at the bottom of the magnetic angle sensor. The magnetic head connector is located on the side of the magnetic head and fixing component away from the magnetic angle sensor. The hairspring is located on the outside of the magnetic head and fixing component. The gas bearing is located on one side of the magnetic head connector. The transmission connector is located on the outside of the gas bearing. The explosion-proof servo motor drive belt is located on the outside of the transmission connector. The outer cylinder is fixedly connected to the transmission connector and located at the bottom of the transmission connector. The inner cylinder is fixedly connected to the gas bearing and located inside the outer cylinder.

[0007] The gas bearing includes a bearing body and a fixing member. The bearing body is disposed on one side of the magnetic head connector, and the fixing member is disposed on the outside of the bearing body.

[0008] The inner cylinder includes an inner cylinder body and a connecting shaft. The connecting shaft is fixedly connected to the bearing body and passes through the fixing member.

[0009] This utility model discloses an online drilling fluid rheology monitoring device. In use, the controller closes the second explosion-proof pneumatic ball valve and opens the first explosion-proof pneumatic ball valve. Fluid is drawn in by an external pump and enters the measuring chamber through the inlet pipe and the first explosion-proof pneumatic ball valve. Once the measuring chamber is full, fluid overflows from the overflow port into the overflow chamber and is then discharged through the drain pipe and drain port, forming a fluid circulation within the entire device. The fluid level stabilizes at the overflow port height after a certain period. Then, the first explosion-proof pneumatic ball valve is closed, stopping fluid extraction. At this time, monitoring is performed by the core measuring component. During the monitoring process, a circulating constant-temperature liquid in the constant-temperature tube ensures the measured fluid level remains constant. The fluid in the measuring chamber is kept at a constant temperature to reduce measurement errors. After monitoring is completed, the second explosion-proof pneumatic ball valve is opened to discharge the fluid, and the system waits for the next round of measurement to begin. The second explosion-proof pneumatic ball valve and the first explosion-proof pneumatic ball valve are connected by DN15 and 25 threads. The explosion-proof electrical interface can be used for automated control. The ball valve itself is corrosion-resistant and not easily clogged. The explosion-proof pressure transmitter and the explosion-proof temperature transmitter monitor the fluid temperature and pressure (liquid level) in the measuring chamber in real time to ensure that the fluid is in the optimal state for testing and that the test results can be obtained immediately. This solves the problem that the experimental testing time of existing well fluid rheology online monitoring equipment is about 1 hour, which is long and has low testing efficiency. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0011] Figure 1 This is a schematic diagram of the structure of an online monitoring device for drilling fluid rheology according to this utility model.

[0012] Figure 2 This is a longitudinal sectional view along the measurement chamber direction of an online drilling fluid rheology monitoring device according to this utility model.

[0013] Figure 3 This is a schematic diagram of the structure of the core measuring component of an online monitoring device for drilling fluid rheology according to this utility model.

[0014] Figure 4 This is a longitudinal sectional view along the gas bearing direction of the core measuring component of an online drilling fluid rheology monitoring device of this utility model.

[0015] In the diagram: 1-Inlet pipe, 2-First explosion-proof pneumatic ball valve, 3-Measuring chamber, 4-Overflow port, 5-Overflow chamber, 6-Thermostatic pipe, 7-Drain pipe, 8-Explosion-proof pressure transmitter, 9-Explosion-proof temperature transmitter, 10-Second explosion-proof pneumatic ball valve, 11-Drain port, 12-Core measuring component, 13-Magnetic angle sensor, 14-Magnetic head and fixing component, 15-Swivel spring, 16-Magnetic head connector, 17-Gas bearing, 18-Explosion-proof servo motor drive belt, 19-Transmission connector, 20-Outer cylinder, 21-Inner cylinder, 22-Bearing body, 23-Fixing component, 24-Inner cylinder body, 25-Connecting shaft. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0017] Please see Figures 1 to 4This utility model provides an online monitoring device for drilling fluid rheology, including an inlet pipe 1, a first explosion-proof pneumatic ball valve 2, a measuring chamber 3, an overflow chamber 5, a thermostatic pipe 6, a drain pipe 7, a second explosion-proof pneumatic ball valve 10, and a core measuring component 12; the overflow chamber 5 is located outside the measuring chamber 3, the measuring chamber 3 has an overflow port 4 located at the top of the measuring chamber 3, the thermostatic pipe 6 is located inside the measuring chamber 3, and the core measuring component 12 is located between the measuring chamber 3 and the... On one side of the overflow chamber 5, the drain pipe 7 is connected to the overflow chamber 5 and the measuring chamber 3, and is located between the overflow chamber 5 and the measuring chamber 3. The drain pipe 7 has a drain port 11, which is located at the bottom of the drain pipe 7. The inlet pipe 1 is connected to the measuring chamber 3 and passes through the overflow chamber 5. The first explosion-proof pneumatic ball valve 2 is located on one side of the inlet pipe 1, and the second explosion-proof pneumatic ball valve 10 is located between the measuring chamber 3 and the drain pipe 7.

[0018] In this embodiment, during use, the controller closes the second explosion-proof pneumatic ball valve 10 and opens the first explosion-proof pneumatic ball valve 2. Fluid is drawn in by an external pump and enters the measuring chamber 3 through the inlet pipe 1 and the first explosion-proof pneumatic ball valve 2. After the measuring chamber 3 is full, the fluid overflows from the overflow port 4 into the overflow chamber 5, and then is discharged through the drain pipe 7 and the drain port 11, forming a fluid circulation within the entire equipment. The liquid level stabilizes at the overflow port 4 after a certain period of time. Then, the first explosion-proof pneumatic ball valve 2 is closed to stop the fluid extraction. At this time, the core measuring component 12 monitors the fluid. During the monitoring process, the circulating constant-temperature liquid in the constant-temperature tube 6 ensures that the fluid in the measuring chamber 3 is at the designed constant temperature, reducing measurement errors. After monitoring is completed, the second explosion-proof pneumatic ball valve 10 is opened to discharge the fluid, waiting for the next round of measurement to begin. The pneumatic ball valve 10 and the first explosion-proof pneumatic ball valve 2 are connected by DN15 and 25 threads. The explosion-proof electrical interface can be used for automated control. The ball valve itself is corrosion-resistant and not easily clogged. The explosion-proof pressure transmitter 8 and the explosion-proof temperature transmitter 9 monitor the fluid temperature and pressure (liquid level) in the measuring chamber 3 in real time, and the test results can be obtained immediately, ensuring that the fluid is in the optimal state for testing. The explosion-proof temperature transmitter 9 is connected by M20x1.5 threads, is a submersible type, is a mature product on the market, is explosion-proof, has a 0.2%FS accuracy, does not clog, and does not require cleaning. The explosion-proof pressure transmitter 8 is connected by M20x1.5 threads, is a mature product on the market, is explosion-proof, can withstand high temperatures of 100℃, is a flat diaphragm hygienic type, has a 0.2%FS accuracy, does not clog, and does not require cleaning. This solves the problem that the experimental testing time of existing well fluid rheology online monitoring equipment is about 1 hour, which is long and has low testing efficiency.

[0019] Furthermore, the core measuring component 12 includes a magnetic angle sensor 13, a magnetic head and fixing component 14, a hairspring 15, a magnetic head connector 16, a gas bearing 17, an explosion-proof servo motor drive belt 18, a transmission connector 19, an outer cylinder 20, and an inner cylinder 21. The magnetic head and fixing component 14 is located at the bottom of the magnetic angle sensor 13. The magnetic head connector 16 is located on the side of the magnetic head and fixing component 14 away from the magnetic angle sensor 13. The hairspring 15 is located on the outside of the magnetic head and fixing component 14. The gas bearing 17 is located on one side of the magnetic head connector 16. The transmission connector 19 is located on the outside of the gas bearing 17. The explosion-proof servo motor drive belt 18 is located on the outside of the transmission connector 19. The outer cylinder 20 is fixedly connected to the transmission connector 19 and is located at the bottom of the transmission connector 19. The inner cylinder 21 is fixedly connected to the gas bearing 17 and is located inside the outer cylinder 20.

[0020] In this embodiment, the explosion-proof servo motor drive belt 18, the transmission connector 19, and the outer cylinder 20 (rotor) are connected as a whole. The inner cylinder 21 (stator), the magnetic head connector 16, the spiral spring 15, and the magnetic head and fixing component 14 are integrated. Driven by the explosion-proof servo motor at the designed speed, when the outer cylinder 20 (rotor) rotates, due to the presence of a viscous fluid (such as drilling fluid) in the gap between it and the inner cylinder 21 (stator), a torque is generated. This torque drives the inner cylinder 21 (stator), the magnetic head connector 16, the spiral spring 15, and the magnetic head and fixing component 14 to generate a fixed angle under stable speed and torque conditions. This angle is sensed and read by the magnetic angle sensor 13 and then output. The core measuring component 12 is driven by an explosion-proof servo motor. The gas bearing 17 is connected to the outer cylinder 20 (rotor) via the explosion-proof servo motor transmission belt 18, ensuring precise speed control and real-time feedback. The hairspring 15 replaces the spring and is connected to the inner cylinder 21 (stator), providing low load and high precision. The non-contact magnetic angle sensor 13 replaces the traditional angle dial, and is connected to the inner cylinder 21 (stator) without contact via the magnetic head and fixing component 14 and the magnetic head connector 16, resulting in no wear, real-time current signal output, and ultra-high precision. The gas bearing 17 ensures that the inner cylinder 21 (stator) does not come into contact with any structure other than air or the fluid being measured, resulting in extremely low friction (the friction medium is air) and a longer lifespan.

[0021] Furthermore, the gas bearing 17 includes a bearing body 22 and a fixing member 23. The bearing body 22 is disposed on one side of the magnetic head connector 16, and the fixing member 23 is disposed on the outside of the bearing body 22.

[0022] In this embodiment, the bearing body 22 ensures that the inner cylinder 21 (stator) does not come into contact with any structure other than air and the fluid to be tested, resulting in extremely low friction (the friction medium is air) and a longer service life. The fastener 23 is used to connect the bearing body 22 to the inner cylinder 21.

[0023] Furthermore, the inner cylinder 21 includes an inner cylinder body 24 and a connecting shaft 25. The connecting shaft 25 is fixedly connected to the bearing body 22 and passes through the fixing member 23. The inner cylinder body 24 is fixedly connected to the connecting shaft 25 and is located on the side of the connecting shaft 25 away from the bearing body 22.

[0024] In this embodiment, the connecting shaft 25 is used to connect the inner cylinder body 24 and the bearing body 22. When the inner cylinder body 24 is in a stable state of rotation speed and torque, it generates a fixed angle, which is sensed and read by the magnetic angle sensor 13 and output to complete the measurement of fluid viscosity.

[0025] The above-disclosed embodiments are merely preferred embodiments of an online drilling fluid rheology monitoring device of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments, and equivalent variations made in accordance with the claims of this application, still fall within the scope of this application.

Claims

1. An online monitoring device for drilling fluid rheology, Its characteristics are: It includes an inlet pipe, a first explosion-proof pneumatic ball valve, a measuring chamber, an overflow chamber, a thermostatic tube, a drain pipe, a second explosion-proof pneumatic ball valve, core measuring components, an explosion-proof pressure transmitter, and an explosion-proof temperature transmitter; The overflow chamber is located outside the measuring chamber, and the measuring chamber has an overflow port located at the top of the measuring chamber. The constant temperature tube is located inside the measuring chamber. The core measuring component is located on one side of the measuring chamber and the overflow chamber. The drain pipe is connected to the overflow chamber and the measuring chamber, and is located between the overflow chamber and the measuring chamber. The drain pipe has a drain outlet located at the bottom of the drain pipe. The inlet pipe is connected to the measuring chamber and passes through the overflow chamber. The first explosion-proof pneumatic ball valve is located on one side of the inlet pipe. The second explosion-proof pneumatic ball valve is located between the measuring chamber and the drain pipe. The explosion-proof pressure transmitter is located at the bottom of the measuring chamber. The explosion-proof temperature transmitter is located on the side of the measuring chamber near the explosion-proof pressure transmitter.

2. The online drilling fluid rheology monitoring device as described in claim 1, Its characteristics are: The core measuring components include a magnetic angle sensor, a magnetic head and fixing component, a spiral spring, a magnetic head connector, a gas bearing, an explosion-proof servo motor drive belt, a transmission connector, an outer cylinder, and an inner cylinder. The magnetic head and fixing component are located at the bottom of the magnetic angle sensor. The magnetic head connector is located on the side of the magnetic head and fixing component away from the magnetic angle sensor. The spiral spring is located on the outside of the magnetic head and fixing component. The gas bearing is located on one side of the magnetic head connector. The transmission connector is located on the outside of the gas bearing. The explosion-proof servo motor drive belt is located on the outside of the transmission connector. The outer cylinder is fixedly connected to the transmission connector and located at the bottom of the transmission connector. The inner cylinder is fixedly connected to the gas bearing and located inside the outer cylinder.

3. The online monitoring device for drilling fluid rheology as described in claim 2, characterized in that; The gas bearing includes a bearing body and a fixing member. The bearing body is disposed on one side of the magnetic head connector, and the fixing member is disposed on the outside of the bearing body.

4. The online monitoring device for drilling fluid rheology as described in claim 3, characterized in that... ； The inner cylinder includes an inner cylinder body and a connecting shaft. The connecting shaft is fixedly connected to the bearing body and passes through the fixing member. The inner cylinder body is fixedly connected to the connecting shaft and is located on the side of the connecting shaft away from the bearing body.

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