Mechanical pressure gauge and measurement system

Abstract

Disclosed are a mechanical pressure gauge and a measurement system. The mechanical pressure gauge comprises a pressure measurement component (11), a pressure recording component (12), a timer (13), a temperature measurement component (14), and a temperature recording component (15), wherein the pressure measurement component is used for measuring the pressure of a fluid; the temperature measurement component is used for measuring the temperature of the fluid; the timer is used for performing timing; the pressure recording component is connected to the pressure measurement component and the timer and is used for recording the change relationship of pressure over time; the temperature recording component is connected to the temperature measurement component and the timer and is used for recording the change relationship of temperature over time. The mechanical pressure gauge uses a mechanical principle to synchronously measure and record pressure and temperature, and therefore is applicable to a downhole environment under ultra-high temperature and high pressure, and can meet the long-acting reliable working requirements of ultra-deep well oil testing.

Description

Mechanical pressure gauges and measuring systems

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311531673.5 filed on November 16, 2023, and cites the contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present application relates to the field of measurement technology, and in particular to a mechanical pressure gauge and a measuring system. Background Art

[0004] Downhole pressure data is the primary basis for determining reservoir properties, dynamic prediction, determining reservoir boundaries and reserves, and assessing well production capacity. Therefore, downhole pressure is the most frequently measured physical quantity in oil and gas development and production. Downhole pressure measurement is also one of the most important tests in well testing. The biggest difference between downhole and surface pressure measurement is the higher ambient temperature. Based on their measurement principles, downhole pressure gauges can be categorized into two types: mechanical and electronic. The high downhole temperature causes instability in the continuous operation of electronic components and batteries, making electronic pressure gauges unable to operate stably for extended periods of time downhole, making them difficult to meet the long-term, reliable operation requirements of ultra-deep well testing.

[0005] Compared to electronic pressure gauges, mechanical pressure gauges can meet the long-term and reliable performance requirements of ultra-deep well testing. However, current mechanical pressure gauges can only measure downhole pressure and cannot simultaneously measure downhole temperature.

[0006] Summary of the Invention

[0007] Embodiments of the present application provide a mechanical pressure gauge and a measurement system for synchronously measuring and recording downhole pressure and temperature.

[0008] The present application provides a mechanical pressure gauge, comprising:

[0009] Pressure measuring component, used to measure the pressure of the fluid;

[0010] A temperature measuring component, used for measuring the temperature of the fluid;

[0011] A timer, used for timing;

[0012] A pressure recording component, connected to the pressure measuring component and the timer, for recording the relationship between pressure changes over time;

[0013] The temperature recording component is connected to the temperature measuring component and the timer, and is used to record the relationship between temperature changes and time.

[0014] The embodiment of the present application further provides a measurement system, the measurement system comprising a mechanical pressure gauge and a reading device;

[0015] The mechanical pressure gauge includes a pressure measuring component, a temperature measuring component, a timer, a pressure recording component, and a temperature recording component; the pressure measuring component is used to measure the pressure of the fluid, the temperature measuring component is used to measure the temperature of the fluid, the timer is used to measure time, the pressure recording component includes a pressure recording medium, on which the rotational position of the pressure stylus is recorded, and the temperature recording component includes a temperature recording medium, on which the rotational position of the temperature stylus is recorded;

[0016] The reading device is used to read the rotation position on the pressure recording medium to obtain the relationship between pressure and time; and to read the rotation position on the temperature recording medium to obtain the relationship between temperature and time.

[0017] The mechanical pressure gauge of the embodiment of the present application includes a pressure measuring component, a pressure recording component, a timer, a temperature measuring component and a temperature recording component. Among them, the pressure measuring component is used to measure the pressure of the fluid. The temperature measuring component is used to measure the temperature of the fluid. The timer is used to perform timing. The pressure recording component is connected to the pressure measuring component and the timer, and is used to record the relationship between the change of pressure over time. The temperature recording component is connected to the temperature measuring component and the timer, and is used to record the relationship between the change of temperature over time. The mechanical pressure gauge of the embodiment of the present application can use a dual-driven timer and mechanical principles to achieve synchronous measurement and recording of pressure and temperature, and can therefore be applicable to downhole environments under ultra-high temperature and high pressure, and can meet the long-term and reliable working requirements required for ultra-deep well oil testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] FIG1 is a schematic diagram of the functional structure of a mechanical pressure gauge in an embodiment of the present application;

[0020] FIG2 is a schematic diagram of the functional structure of a pressure diaphragm and a pressure measuring component in an embodiment of the present application;

[0021] FIG3 is a schematic diagram of the functional structure of a pressure recording component, a timer, and a temperature recording component in an embodiment of the present application;

[0022] FIG4 is a schematic diagram of the functional structure of a temperature measurement component in an embodiment of the present application;

[0023] FIG5 is a schematic cross-sectional view of the outer cylinder in an embodiment of the present application.

[0024] [Explanation of the accompanying drawings] 11. Pressure measuring component; 111. Pressure elastic element; 112. Pressure core shaft; 113. Pressure liquid storage chamber; 114. Pressure capillary; 12. Pressure recording component; 121. Pressure recording cylinder; 123. Pressure contact needle cylinder; 124. Pressure contact needle; 13. Timer; 14. Temperature measuring component; 141. Temperature elastic element; 142. Temperature core shaft; 15. Temperature recording component; 151. Temperature recording cylinder; 153. Temperature contact needle cylinder; 154. Temperature contact needle; 16. Pressure diaphragm; 17. Inner cylinder; 18. Flow channel; 19. Outer cylinder. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of the present disclosure. In addition, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0026] Downhole pressure gauges can be divided into two types: mechanical and electronic. Generally, electronic pressure gauges have gradually replaced mechanical gauges due to their superior accuracy, resolution, and reliability at temperatures below 200°C. However, at temperatures above 200°C, the performance of the electronic components and batteries in electronic pressure gauges becomes unstable, making them unable to operate stably for long periods of time. Therefore, in oil and gas field drilling and completion engineering, electronic pressure gauges struggle to meet the long-term, reliable performance requirements of ultra-deep well testing. Even when electronic pressure gauges are placed in insulating devices such as thermos bottles before being lowered into the well for measurement, they still lack the ability to operate reliably for extended periods. They are essentially single-use, resulting in high operating costs and a struggle to meet the long-term, reliable performance requirements of ultra-deep well testing. Compared to electronic pressure gauges, mechanical pressure gauges offer superior temperature resistance and can meet the downhole pressure measurement requirements at temperatures above 200°C. Consequently, demand for ultra-high-temperature, high-pressure downhole mechanical pressure gauges is increasing. Existing mechanical pressure gauges, such as GRC pressure gauges and Kuster mechanical pressure gauges, can only measure downhole pressure and cannot simultaneously measure and record pressure and temperature.

[0027] Please refer to Figures 1-5 . This embodiment of the present application provides a mechanical pressure gauge. This mechanical pressure gauge is capable of simultaneously measuring and recording pressure and temperature. Because it employs mechanical principles to simultaneously measure pressure and temperature, it is suitable for use in downhole environments under ultra-high temperatures and pressures, meeting the long-term, reliable operation requirements of ultra-deep well testing.

[0028] In some embodiments, a mechanical pressure gauge may include a pressure measuring component 11, a pressure recording component 12, a timer 13, a temperature measuring component 14, a temperature recording component 15, and a pressure diaphragm 16. The pressure measuring component 11 is used to measure the pressure of a fluid. The temperature measuring component 14 is used to measure the temperature of a fluid. The timer 13 is used to measure time. The pressure recording component 12, connected to the pressure measuring component 11 and the timer 13, is used to record changes in pressure over time. The temperature recording component 15, connected to the temperature measuring component 14 and the timer 13, is used to record changes in temperature over time.

[0029] In some embodiments, mechanical pressure gauges can be used in downhole well testing to measure the pressure and temperature of fluids within the wellbore during well testing. Well testing involves introducing fluids (including oil, gas, water, etc.) from the formation into the wellbore through perforation or other means, followed by testing and analysis to determine the formation's productivity and pressure, as well as the fluid's properties.

[0030] In some embodiments, the pressure diaphragm 16 may include a rubber pressure diaphragm. The rubber pressure diaphragm is used to isolate the downhole fluid from the pressure measuring component 11, preventing the downhole high-temperature and high-pressure corrosive media (such as oil and gas containing hydrogen sulfide or carbon dioxide) from corroding the pressure measuring component 11, thereby affecting the measurement accuracy of the pressure measuring component 11.

[0031] In some embodiments, the pressure measuring component 11 may include a pressure elastic element 111 and a pressure mandrel 112. The pressure mandrel 112 is connected to the pressure recording component 12. The pressure mandrel 112 is connected to one end of the pressure elastic element 111. The pressure elastic element 111 is capable of rotationally deforming under the action of fluid pressure. The rotational deformation of the pressure elastic element 111 can drive the pressure mandrel 112 to rotate. The rotation of the pressure mandrel 112 is used to enable the pressure recording component 12 to record pressure.

[0032] For example, the pressure of high-temperature and high-pressure fluid in the well acts on the pressure diaphragm 16. The pressure diaphragm 16 can transmit the pressure of the fluid to the pressure elastic element 111. After being subjected to the pressure, the pressure elastic element 111 will rotate and deform.

[0033] The pressure measuring component 11 may further include a pressure center rod, which is used to constrain the pressure elastic element 111 when the pressure elastic element 111 is rotated and deformed, so that the pressure core shaft 112 of the pressure elastic element 111 rotates.

[0034] The pressure measuring component 11 may also include a pressure storage chamber 113 and a pressure capillary 114. The pressure storage chamber 113 is used to store oil (such as silicone oil). For example, the pressure of the high-temperature and high-pressure fluid in the well acts on the pressure diaphragm 16. The pressure diaphragm 16 transfers the pressure of the fluid to the pressure capillary through the oil in the pressure storage chamber, pushing the pressure elastic element 111 to rotate and deform. Specifically, for example, the fluid pressure is transferred to the pressure capillary 114 through the oil in the pressure storage chamber, causing the pressure capillary 114 to move axially. The movement of the pressure capillary 114 can push the pressure elastic element 111 to compress. Under the constraint of the pressure center rod, the compression of the pressure elastic element 111 causes one end of the pressure elastic element 111 to rotate and deform. This end of the pressure elastic element 111 is fixedly connected to the pressure core shaft 112, thereby driving the pressure core shaft 112 to rotate.

[0035] The pressure elastic element 111 may include a multi-turn spring tube, etc. The pressure core shaft 112 may be cylindrical in shape. The pressure core shaft 112 can transmit the pressure of the fluid to the pressure recording component 12 for recording.

[0036] In some embodiments, the pressure recording component 12 may include a pressure recording cylinder 121. A pressure recording medium and a pressure contact needle cylinder 123 are disposed within the pressure recording cylinder 121. The pressure recording medium is in close contact with the inner surface of the pressure recording cylinder 121. The pressure recording medium is bent into a hollow cylinder within the pressure recording cylinder 121. The pressure contact needle cylinder 123 is placed within the hollow cylinder. A pressure contact needle 124 is disposed on the outer surface of the pressure contact needle cylinder 123. This allows the pressure contact needle 124 on the pressure contact needle cylinder 123 to be moved across the pressure recording medium. Specifically, the pressure contact needle cylinder 123 is connected to the pressure core shaft 112, and the connection may include a fixed connection or a detachable connection. Rotation of the pressure core shaft 112 can drive rotation of the pressure contact needle cylinder 123. Rotation of the pressure contact needle cylinder 123 can drive rotation of the pressure contact needle 124. The pressure contact needle 124 can be moved across the pressure recording medium, causing the rotational position to be recorded on the pressure recording medium. The rotational position on the pressure recording medium can be used to indicate the pressure of the fluid. By comparing and fitting the rotation position recorded on the pressure recording medium with the calibrated pressure position, a high-precision pressure value can be obtained.

[0037] The pressure recording medium may include a metal recording card, and the shape of the metal recording card may be rectangular or the like.

[0038] The pressure recording component 12 may further include a switch controller. The switch controller is used to control the positional state of the pressure contact pin 124 and the pressure recording medium. When the switch controller of the pressure recording cylinder 121 is in the on position, the pressure contact pin 124 will press against the pressure recording medium. The pressure contact pin 124 can be moved on the pressure recording medium. The pressure recording component 12 enters the pressure recording state. When the switch controller of the pressure recording cylinder 121 is in the off position, the pressure contact pin 124 will be away from the pressure recording medium. The pressure contact pin 124 cannot be moved on the pressure recording medium. The pressure recording component 12 exits the pressure recording state.

[0039] In some embodiments, the temperature measuring component 14 may include a temperature elastic element 141 and a temperature mandrel 142. The temperature mandrel 142 is connected to the temperature recording component 15. The temperature mandrel 142 is connected to one end of the temperature elastic element 141. The temperature elastic element 141 is configured to rotate and deform in response to the fluid temperature. The rotational deformation of the temperature elastic element 141 drives the temperature mandrel 142 to rotate. The rotation of the temperature mandrel 142 causes the temperature recording component 15 to record the temperature.

[0040] The temperature measuring component 14 may further include a temperature center rod, which is used to constrain the temperature elastic element 141 when the temperature elastic element 141 is rotated and deformed, so that the temperature core shaft 142 of the temperature elastic element 141 rotates.

[0041] The temperature measuring component 14 may also include a temperature storage chamber and a temperature capillary. The temperature storage chamber is used to store a thermosensitive liquid, which may include a low-boiling-point thermosensitive liquid, such as mercury. The temperature of the fluid can be transmitted to the temperature storage chamber. The thermosensitive liquid in the temperature storage chamber is heated to form saturated vapor. The saturated vapor expands in volume and is transferred to the temperature capillary through the temperature storage chamber, causing the temperature capillary to push the temperature elastic element 141 to rotate and deform. For example, the expansion of the saturated vapor can cause the temperature capillary to move axially. The movement of the temperature capillary can cause the temperature elastic element 141 to compress. Under the constraint of the temperature center rod, the compression of the temperature elastic element 141 causes one end of the temperature elastic element 141 to rotate and deform. This end of the temperature elastic element 141 is fixedly connected to the temperature core shaft 142, thereby driving the temperature core shaft 142 to rotate.

[0042] The temperature elastic element 141 may include a multi-turn spring tube, etc. The temperature core shaft 142 may be cylindrical in shape. The temperature core shaft 142 can transmit the temperature of the fluid to the temperature recording component 15 for recording.

[0043] In some embodiments, the temperature recording component 15 may include a temperature recording cylinder 151. A temperature recording medium and a temperature probe cylinder 153 are disposed within the temperature recording cylinder 151. The temperature recording medium is in close contact with the inner surface of the temperature recording cylinder 151. The temperature recording medium is bent into a hollow cylinder within the temperature recording cylinder 151. The temperature probe cylinder 153 is placed within the hollow cylinder. A temperature probe 154 is disposed on the outer surface of the temperature probe cylinder 153. This allows the temperature probe 154 on the temperature probe cylinder 153 to be moved across the temperature recording medium. Specifically, the temperature probe cylinder 153 is connected to the temperature mandrel 142, and the connection may include a fixed connection or a detachable connection. Rotation of the temperature mandrel 142 can rotate the temperature probe cylinder 153. Rotation of the temperature probe cylinder 153 can also rotate the temperature probe 154. The temperature probe 154 can be moved across the temperature recording medium, causing its rotational position to be recorded on the temperature recording medium. The rotational position on the temperature recording medium can be used to indicate the temperature of the fluid. By comparing and fitting the rotation position recorded on the temperature recording medium with the calibrated temperature position, a high-precision temperature value can be obtained.

[0044] The temperature recording medium may include a metal recording card, which may be rectangular in shape.

[0045] The temperature recording component 15 may also include a switch controller. The switch controller is used to control the position of the temperature contact pin 154 relative to the temperature recording medium. When the switch controller of the temperature recording cylinder 151 is in the on position, the temperature contact pin 154 will press against the temperature recording medium. The temperature contact pin 154 can be moved across the temperature recording medium. The temperature recording component 15 enters the temperature recording state. When the switch controller of the temperature recording cylinder 151 is in the off position, the temperature contact pin 154 will be away from the temperature recording medium. The temperature contact pin 154 cannot be moved across the temperature recording medium. The temperature recording component 15 exits the temperature recording state.

[0046] In some embodiments, the timer 13 can be a dual-drive timer. Specifically, one end of the timer 13 can be connected to the temperature recording component 15, and can push the temperature recording cylinder 151 in the temperature recording component 15 to move axially. In this way, when the temperature contact pin 154 records the rotational position on the temperature recording medium by rotating, the temperature recording medium can also move axially. As a result, the rotational position of the temperature contact pin 154 recorded on the temperature recording medium can represent the relationship between the change of temperature over time. At the same time, the other end of the timer 13 can be connected to the pressure recording component 12, and can push the pressure recording cylinder 121 in the pressure recording component 12 to move axially. In this way, when the pressure contact pin 124 records the rotational position on the pressure recording medium by rotating, the pressure recording medium can also move axially. As a result, the rotational position of the pressure contact pin 124 recorded on the pressure recording medium can represent the relationship between the change of pressure over time.

[0047] It should be noted that the timer can synchronously drive the temperature recording component 15 and the pressure recording component 12 to move. Thus, the mechanical pressure gauge can achieve synchronous measurement and recording of pressure and temperature.

[0048] In some embodiments, the timer 13 may include a power source mechanism, a pressure output shaft, and a temperature output shaft. The pressure output shaft and the temperature output shaft may be two output shafts of the timer 13 and may be located at both ends of the timer 13. The power source mechanism is used to provide energy to rotate the pressure output shaft and the temperature output shaft. The pressure output shaft may be connected to the pressure recording cylinder 121. The rotation of the pressure output shaft can drive the pressure recording cylinder 121 to move axially, thereby causing the pressure recording medium to move axially. The temperature output shaft may be connected to the temperature recording cylinder 151. The rotation of the temperature output shaft can drive the temperature recording cylinder 151 to move axially, thereby causing the temperature recording medium to move axially.

[0049] It should be noted that the position of the pressure contact needle 123 can remain relatively unchanged during the axial movement of the pressure recording cylinder 121. The position of the temperature contact needle 153 can remain relatively unchanged during the axial movement of the temperature recording cylinder 151.

[0050] For example, the pressure recording cylinder 121 may be provided with a pressure guide screw. A pressure output shaft is connected to the pressure guide screw. Rotation of the pressure output shaft can cause the pressure guide screw to move axially. The movement of the pressure guide screw is used to propel the pressure recording cylinder 121 to move axially. For another example, the temperature recording cylinder 151 may be provided with a temperature guide screw. A temperature output shaft is connected to the temperature guide screw. Rotation of the temperature output shaft can cause the temperature guide screw to move axially. The movement of the temperature guide screw is used to propel the temperature recording cylinder 151 to move axially.

[0051] For example, the timer 13 may include a gear train, an escapement, and a vibration mechanism. Energy from the source mechanism is transferred to the vibration mechanism via the gear train and escapement. The vibration mechanism, in turn, controls the rotational speed of the escapement and gear train, ensuring that the rotational speeds of the pressure and temperature output shafts meet design requirements. The gear train is used to transmit mechanical energy and motion. For example, the gear train can not only transfer mechanical energy from one axis to another, but also transfer motion from one axis to another, thereby ensuring the accuracy and stability of the rotation of the pressure and temperature output shafts. The escapement is used for speed regulation. For example, the escapement is a switching device for mechanical energy transmission. It is controlled by a timing reference and switches the main transmission chain of the timer 13 on and off at a certain frequency, causing the pressure and temperature output shafts to stop intermittently and rotate at a certain average speed, thereby indicating the accurate time. The vibration mechanism is used to generate fixed-frequency vibrations. This vibration ensures that the pressure and temperature output shafts rotate at a certain average speed, thereby ensuring timing accuracy.

[0052] The power source mechanism may include a spring, etc. A spring can be a metal bar used to control mechanical movement. A spring can be a flexible material that can store energy and convert it into mechanical energy when released.

[0053] In some embodiments, the mechanical pressure gauge further comprises a housing, in which a pressure measuring component 11, a pressure recording component 12, a timer 13, a temperature measuring component 14 and a temperature recording component 15 are sequentially arranged.

[0054] The housing can be cylindrical. It can include an inner cylinder 17 and an outer cylinder 19. The pressure measuring component 11, the pressure recording component 12, the timer 13, the temperature measuring component 14, and the temperature recording component 15 are sequentially disposed within the inner cylinder 17. The outer cylinder 19 has a cavity for accommodating the inner cylinder 17 and a flow channel 18 for fluid flow.

[0055] For example, one end of outer tube 19 can be connected to a first pipe, and the other end of outer tube 19 can be connected to a second pipe. Fluid in the first pipe can flow into the second pipe through flow channel 18 in outer tube 19. During the fluid flow, the pressure and temperature of the fluid can be simultaneously measured and recorded.

[0056] The mechanical pressure gauge of the embodiment of the present application includes a pressure measuring component 11, a pressure recording component 12, a timer 13, a temperature measuring component 14 and a temperature recording component 15. The pressure measuring component 11 is used to measure the pressure of the fluid. The temperature measuring component 14 is used to measure the temperature of the fluid. The timer 13 is used to perform timing. The pressure recording component 12 is connected to the pressure measuring component 11 and the timer 13, and is used to record the relationship between the change of pressure over time. The temperature recording component 15 is connected to the temperature measuring component 14 and the timer 13, and is used to record the relationship between the change of temperature over time. The mechanical pressure gauge of the embodiment of the present application uses a dual-driven timer and a mechanical principle to achieve synchronous measurement and recording of pressure and temperature, and can therefore be applied to downhole environments under ultra-high temperature and high pressure, and can meet the long-term and reliable working requirements required for ultra-deep well oil testing.

[0057] The mechanical pressure gauge of the embodiment of the present application can be used in an underground environment with a maximum temperature of 260°C and a maximum pressure of 210 MPa, and can achieve an effective test time of more than 240 hours at 260°C, meeting the requirements for ultra-high temperature and high pressure oil test.

[0058] The mechanical pressure gauge of the embodiment of the present application realizes an integrated design of the pressure gauge and the support. The pressure gauge has a compact and simple structure, small space, reliable operation, high test accuracy, and realizes modularization and standardization, which can adapt to the harsh underground environment.

[0059] The mechanical pressure gauge of the present embodiment has excellent reusability and customizability. Pressure element modules and temperature element modules can be optionally configured as needed to achieve simultaneous measurement and recording of different pressure and temperature levels, or separate measurement and recording of pressure and temperature. The pressure element module can include a pressure measurement component and a pressure recording component. The temperature element module can include a temperature measurement component and a temperature recording component.

[0060] The following describes a scenario example of an embodiment of the present application, through which the assembly of a mechanical pressure gauge can be realized.

[0061] In this example scenario, the pressure measurement component can be assembled. Specifically, a pressure elastic element can be inserted into the inner cylinder, with the pressure core shaft of the pressure elastic element passing through the guide hole of the inner cylinder. The pressure elastic element and the inner cylinder can be connected by a threaded connection. The pressure elastic element can be tightened.

[0062] In this scenario example, a pressure recording component can be assembled. Specifically, the pressure contact needle cylinder can be installed in the inner cylinder, and the pressure core shaft of the pressure elastic element can be covered. The pressure recording medium can be installed in the pressure recording cylinder. The surface of the pressure recording medium used to record the pressure faces the axis of the pressure recording cylinder. The pressure recording medium is rotated clockwise or counterclockwise in the pressure recording cylinder until the rubber edge of the pressure recording medium is visible. The pressure recording cylinder can be installed in the inner cylinder, and the pressure contact needle cylinder can be covered. The pressure guide screw can be installed in the inner cylinder, and the end clip of the pressure guide screw can be connected to the clip of the pressure recording cylinder.

[0063] The clutch wheel can be rotated to move the pressure recording cylinder to its furthest position from the timer. When the pressure recording cylinder's switch controller is pushed to the on position, the pressure stylus presses against the pressure recording medium, entering the pressure recording state. When the pressure recording cylinder's switch controller is pushed to the off position, the pressure stylus moves away from the pressure recording medium, exiting the pressure recording state.

[0064] In this example scenario, a timer can be assembled. Specifically, the timer can be wound by rotating the output shaft (e.g., the pressure output shaft or the temperature output shaft) counterclockwise. The pressure output shaft can be aligned with the screw hole of the pressure guide screw and screwed into the pressure guide screw. The timer and the inner barrel can be connected by a threaded connection. The timer can be screwed into the inner barrel.

[0065] In this example scenario, a temperature recording component can be assembled. Specifically, the temperature output shaft of the timer can be screwed into the temperature guide screw. Similar to assembling the pressure recording component, the temperature recording medium can be loaded into the temperature recording cylinder. The temperature recording cylinder can be connected to the temperature guide screw. The end clip of the temperature guide screw can be connected to the clip of the temperature recording cylinder.

[0066] The clutch wheel can be rotated to move the temperature recording cylinder to its furthest position from the timer. When the switch controller of the temperature recording cylinder is pushed to the on position, the temperature probe will press against the temperature recording medium, thus entering the temperature recording state. When the switch controller of the temperature recording cylinder is pushed to the off position, the temperature probe will move away from the temperature recording medium, thus exiting the temperature recording state.

[0067] In this example scenario, the temperature measurement component is assembled. Specifically, a temperature elastic element can be inserted into the inner cylinder, with the temperature core shaft of the temperature elastic element passing through the guide hole of the inner cylinder. The temperature elastic element and the inner cylinder can be connected by a thread. The temperature elastic element can be tightened.

[0068] In this example scenario, the oil reservoir of the pressure measuring component can be half-filled with clean oil, then replaced and refilled. The pressure diaphragm can be connected to the pressure measuring component. The bleed screw can be screwed into the port on the side of the oil reservoir to prevent oil leakage. The switch control for the pressure recording cylinder can be turned on, and the switch control for the temperature recording cylinder can be turned on. The inner cylinder can be inserted into the outer cylinder and tightened.

[0069] The present application also provides a measurement system, which may include a mechanical pressure gauge and a reading device.

[0070] The mechanical pressure gauge can be referred to the introduction of the aforementioned embodiment and will not be described again here.

[0071] A mechanical pressure gauge may include a pressure recording component and a temperature recording component. The pressure recording component may include a pressure recording medium. The pressure recording medium records the rotational position of the pressure stylus. The temperature recording component may include a temperature recording medium, on which the rotational position of the temperature stylus is recorded. A reading device is used to read the rotational position on the pressure recording medium to obtain the relationship between pressure changes over time; and to read the rotational position on the temperature recording medium to obtain the relationship between temperature changes over time. For example, the pressure recording medium may include a metal recording card. The temperature recording medium may include a metal recording card. The reading device may include a card reader. The pressure curve and temperature curve are read by the card reader. The pressure curve and temperature curve are compared with calibrated pressure calibration curves and temperature calibration curves, and a numerical interpolation method is applied to fit the high-precision pressure curve and temperature curve.

[0072] The following introduces an application scenario of an embodiment of the present application.

[0073] In this example scenario, when a test oil test is required, one end of the pressure gauge's outer tube can be connected to one test oil string, and the other end can be connected to another test oil string. Fluid in both test oil strings can flow through the flow channel of the outer tube. The mechanical pressure gauge can measure and record the time-dependent changes in the pressure of the fluid in the flow channel, and can also simultaneously measure and record the time-dependent changes in the temperature of the fluid in the flow channel.

[0074] In this scenario, after the oil test is completed, the mechanical pressure gauge can be removed, along with the pressure and temperature recording media. These recording media can include metal recording cards. The pressure and temperature curves can be read using a card reader. These can be compared with calibrated pressure and temperature calibration curves, and numerical interpolation methods can be used to fit the pressure and temperature curves to create high-precision fits.

[0075] Those skilled in the art will understand that the descriptions of the various embodiments in this application each have their own focus. For portions not described in detail in a particular embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, it is understood that after reading this application document, those skilled in the art may, without inventive effort, conceive of any combination of some or all of the embodiments listed in this application, and such combinations are also within the scope of disclosure and protection of this application.

[0076] Although the present application has been described through examples, those skilled in the art will appreciate that the above examples are merely intended to help understand the core concept of the present application. Those skilled in the art will appreciate that the present application is susceptible to numerous variations and modifications. It is intended that the appended claims encompass such variations and modifications without departing from the spirit of the present application.

Claims

1. A mechanical pressure gauge, characterized in that: include: A pressure measuring component, used to measure the pressure of a fluid; A temperature measuring component, used for measuring the temperature of the fluid; A timer, used for timing; A pressure recording component, connected to the pressure measuring component and the timer, and used to record the relationship between pressure changes and time; A temperature recording component, connected to the temperature measuring component and the timer, for recording the relationship between temperature changes and time; The pressure measuring component comprises a pressure elastic element and a pressure mandrel, and the pressure mandrel is connected to the pressure recording component; The pressure elastic element is used to rotate and deform under the action of fluid pressure; the rotational deformation of the pressure elastic element drives the pressure mandrel to rotate; the rotation of the pressure mandrel is used to enable the pressure recording component to record pressure; The pressure recording component comprises a pressure recording cylinder, in which a pressure recording medium and a pressure contact needle cylinder are arranged, and a pressure contact needle is arranged on the pressure contact needle cylinder; The rotation of the pressure core shaft drives the pressure needle cylinder to rotate, and the rotation of the pressure needle cylinder drives the pressure needle to rotate. The pressure needle is used to record the rotation position on the pressure recording medium, and the rotation position is used to indicate the pressure of the fluid.

2. The mechanical pressure gauge according to claim 1, characterized in that A pressure guide screw is provided on the pressure recording tube; the timer includes a power source mechanism and a pressure output shaft, the power source mechanism is used to provide energy to rotate the pressure output shaft, the rotation of the pressure output shaft is used to push the pressure guide screw to move, and the movement of the pressure guide screw is used to push the pressure recording tube to move axially.

3. The mechanical pressure gauge according to claim 1, characterized in that The temperature measuring component comprises a temperature elastic element and a temperature mandrel, and the temperature mandrel is connected to the temperature recording component; The temperature elastic element is used to rotate and deform under the action of fluid temperature; the rotational deformation of the temperature elastic element drives the temperature mandrel to rotate; the rotation of the temperature mandrel is used to enable the temperature recording component to record the temperature.

4. The mechanical pressure gauge according to claim 3, characterized in that The temperature recording component comprises a temperature recording cylinder, in which a temperature recording medium and a temperature contact needle cylinder are arranged, and a temperature contact needle is arranged on the temperature contact needle cylinder; The rotation of the temperature core shaft drives the temperature needle cylinder to rotate, and the rotation of the temperature needle cylinder drives the temperature needle to rotate. The temperature needle is used to record the rotation position on the temperature recording medium, and the rotation position is used to indicate the temperature of the fluid.

5. The mechanical pressure gauge according to claim 4, characterized in that A temperature guide screw is provided on the temperature recording tube; the timer includes a power source mechanism and a temperature output shaft, the power source mechanism is used to provide energy to rotate the temperature output shaft, the rotation of the temperature output shaft is used to drive the temperature guide screw to move, and the movement of the temperature guide screw is used to drive the temperature recording tube to move axially.

6. The mechanical pressure gauge according to claim 1, characterized in that The mechanical pressure gauge further comprises a housing; a pressure measuring component, a pressure recording component, a timer, a temperature recording component and a temperature measuring component are sequentially arranged in the housing.

7. The mechanical pressure gauge according to claim 6, characterized in that The shell includes an inner cylinder and an outer cylinder; a pressure measuring component, a pressure recording component, a timer, a temperature recording component and a temperature measuring component are sequentially arranged in the inner cylinder; the outer cylinder has a cavity and a flow channel, the cavity is used to accommodate the inner cylinder, and the flow channel is used for the fluid to flow through.

8. A measurement system, characterized in that: The measuring system includes a mechanical pressure gauge and a reading device; The mechanical pressure gauge comprises a pressure measuring component, a temperature measuring component, a timer, a pressure recording component and a temperature recording component; wherein the pressure measuring component is used to measure the pressure of the fluid, the temperature measuring component is used to measure the temperature of the fluid, the timer is used to perform timing, the pressure recording component comprises a pressure recording medium, on which the rotational position of the pressure stylus is recorded, and the temperature recording component comprises a temperature recording medium, on which the rotational position of the temperature stylus is recorded; The reading device is used to read the rotation position on the pressure recording medium to obtain the relationship between pressure and time; and to read the rotation position on the temperature recording medium to obtain the relationship between temperature and time.

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