Device for automatically measuring drilling mud filtrate yield

Abstract

The utility model relates to a device for automatically measuring the filtrate yield of drilling mud, which can enable a driving component to execute corresponding actions through a control system according to a preset program so as to realize automatic replacement of a filter paper disc, quantitative extraction of the drilling mud, constant-pressure filtration, filtrate collection, filtrate yield metering and data storage and uploading. Therefore, the drilling mud sample is automatically measured, the drilling mud filtrate yield in at least one drilling shift can be automatically measured, and the workload of technicians is greatly reduced. And the device is good in reliability and high in execution efficiency, can realize automatic measurement of the drilling mud filtrate yield for a long time to the greatest extent, and lays a foundation for expanding the online monitoring technology and the application field.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic monitoring of drilling fluid, in particular to a device for automatically measuring the output of drilling mud filtrate. Background Art

[0002] The preparation of drilling mud filtrate and production measurement are important links in on-site construction. Among them, the prepared filtrate can provide test samples for determining performance parameters such as ion content in on-site mud, and the filtrate production reflects the filtration performance and wall-building performance of drilling mud. At present, the on-site measurement procedure based on API test standards is to measure the amount of filtrate passing through the filter medium per unit filter area within a certain period of time by the filter pressure method. That is, the filtration loss and wall-building performance of drilling fluid are evaluated by the filtration loss of drilling mud. When the drilling fluid is subjected to a filter pressure test, the filtrate production of drilling mud is calculated by the filtrate volume of the filter medium and the mud cake formed. The smaller the filtration loss of the drilling fluid, the easier it is to form a low-permeability, flexible, thin and dense filter cake, which further indicates that the drilling fluid is conducive to stabilizing the well wall and protecting the oil and gas layer.

[0003] Normal temperature and pressure filter loss meters are usually used to measure the filtration loss at the drilling site. Drilling mud is collected on site, pressurized by the filter loss meter, the filtrate is suppressed, collected in a measuring cylinder or measuring cup for manual measurement, and the filtrate volume is read. Among them, the drilling mud to be analyzed needs to be collected in advance, and then the filter loss meter is operated for manual testing, or the filtration loss value is measured by the mud filtration loss automatic metering device. These operation methods require the on-site staff to repeat the above operations many times within a drilling operation cycle to obtain the drilling mud filtrate production at different times. Therefore, it is impossible to get rid of manual operation. The automated collection and measurement of drilling mud filtrate production can effectively improve the efficiency of on-site engineers and workers in obtaining drilling fluid performance parameters, provide data support for the determination of wellbore stability in real time during drilling construction, facilitate the evaluation of drilling mud filtration and wall-building performance, and provide data support for on-site drilling mud operations and adjustments. Utility Model Content

[0004] Based on the above problems existing in the prior art, the utility model provides a device for automatically measuring drilling mud filtrate, which can realize multiple automatic measurements of drilling mud samples to be monitored at the drilling site.

[0005] The utility model adopts a technical solution to solve the technical problem: to provide a device for automatically measuring the production of drilling mud filtrate, including:

[0006] A filter press assembly, comprising a base mounted on a first frame, a mud cylinder located above the base and used to contain mud, and a stacking cylinder mounted on the base and used to stack unused filter paper discs;

[0007] a measuring assembly, comprising a mobile frame mounted on the second frame, the second frame being located below the first frame, the mobile frame being mounted with a measuring cylinder for measuring the filtrate; and

[0008] A drive assembly including a first cylinder and a second cylinder;

[0009] The first cylinder is configured to deliver mud to the cavity in the mud barrel multiple times during at least one drilling shift.

[0010] The second cylinder is configured to push the filter paper disc in the stacking cylinder to below the mud cylinder multiple times and simultaneously push the moving frame to below the filter press assembly, so that the measuring cylinder can receive the filtrate.

[0011] Further, the filter paper disc is configured to be able to seal with the mud barrel when pushed below the mud barrel, so that the cavity is defined by the side wall of the mud barrel, the filter paper disc, and a piston installed at the output end of the first cylinder.

[0012] Furthermore, the base includes a support plate and a first guide plate installed on the support plate, and the first guide plate is provided with a first guide groove for guiding the filter paper disc in the stacking barrel to below the mud barrel.

[0013] Furthermore, a second guide plate is installed between the first guide plate and the support plate, and a second guide groove for guiding the used filter paper disc is formed on the second guide plate, so as to guide the used filter paper disc to fall into the waste liquid tank along the second frame.

[0014] Furthermore, the filter press assembly also includes a sealing cylinder mounted on the first frame, and an output end of the sealing cylinder is connected to the mud barrel, so that the lower end surface of the mud barrel can form or release a sealing fit with the filter paper disc.

[0015] Furthermore, a fixing member for fixing a plurality of the measuring cylinders is mounted on the movable frame, and the fixing member comprises a placing plate and a locking plate mounted on the placing plate, and the locking plate is configured to be coaxially rotatable relative to the placing plate to lock the measuring cylinders.

[0016] Furthermore, a plurality of placement grooves are evenly formed on the edge of the placement plate, and locking grooves corresponding to the placement grooves are evenly formed on the edge of the locking plate. The locking grooves include locking portions, and the locking portions (445) are configured to limit the measuring cylinder in the locking grooves and the placement grooves when the locking plate is rotated a certain angle relative to the placement plate.

[0017] Furthermore, a motor for driving the fixed part to rotate is also installed on the movable frame, and the motor is configured to move the unused measuring cylinder to below the filter paper plate under the mud cylinder.

[0018] Furthermore, it also includes a control system, which includes a computer and a PLC control module electrically connected to the computer, and the PLC control module is electrically connected to a first solenoid valve arranged at the input end of the first cylinder and a second solenoid valve arranged at the input end of the second cylinder, so that the first cylinder and the second cylinder can perform actions according to a predetermined program in the computer.

[0019] Furthermore, the computer is electrically connected to a camera installed on the second frame, and the computer can process the image taken by the camera through an image recognition program and obtain the yield of the filtrate.

[0020] Furthermore, a push plate is provided at the output end of the second cylinder, and a push piece is installed on the upper part of the push plate, so that when the push piece pushes the filter paper disc to the bottom of the mud barrel, the lower part of the push plate pushes the movable frame to the bottom of the filter press assembly.

[0021] Furthermore, the cavity (331) is connected to the gas source via a pressure reducing valve for setting the pressure required for pressurized filtration, and a one-way valve is provided between the pressure reducing valve and the cavity so that the gas can only flow from the pressure reducing valve to the cavity.

[0022] The beneficial effects of the utility model are as follows: on the one hand, the device for automatically measuring the drilling mud filtrate production provided by the utility model enables the driving component to perform corresponding actions according to a predetermined program through a control system, thereby realizing automatic replacement of filter paper discs, quantitative extraction of drilling mud, constant pressure filtration, filtrate collection, filtrate production metering, data storage and uploading, thereby realizing automatic measurement of drilling mud samples, which can meet the automatic measurement of drilling mud filtrate production within at least one drilling shift, and greatly reducing the workload of technicians.

[0023] On the other hand, the device for automatically measuring the drilling mud filtrate production provided by the utility model has good reliability and high execution efficiency, and can realize the automated measurement of the drilling mud filtrate production for a long time to the greatest extent, laying the foundation for expanding the online monitoring technology and application fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 Shown is a structural cross-sectional view of a device for automatically measuring drilling mud filtrate production from one viewing angle.

[0026] Figure 2 Shown Figure 1 A structural cross-sectional view of the device for automatically determining the drilling mud filtrate production when not in operation from another perspective.

[0027] Figure 3 Shown Figure 2 A structural cross-sectional view of the device for automatically determining the drilling mud filtrate production during operation.

[0028] Figure 4 Shown is an exploded view of the base.

[0029] Figure 5 The figure shows a schematic diagram of the structure when the fixing part is not locked.

[0030] Figure 6 The figure shows a schematic diagram of the structure when the fixing part is locked.

[0031] Figure 7 Shown is a schematic diagram of the pipeline connection of the drive component and the signal transmission with the control system.

[0032] In the figures, the reference numerals are: 10, first frame; 20, second frame;

[0033] 30. filter press assembly; 31. filter paper plate; 32. base; 321. support plate; 320. through hole; 322. first guide plate; 323. first guide groove; 324. second guide plate; 325. second guide groove; 33. mud cylinder; 331. cavity; 34. sealing cylinder; 35. stacking cylinder; 351. outlet;

[0034] 40. measuring assembly; 41. moving frame; 42. measuring cylinder; 43. camera; 44. fixing member; 441. placing plate; 442. placing groove; 443. locking plate; 444. locking groove; 445. locking part; 45. motor; 46. waste liquid tank; 47. slide table;

[0035] 50, driving assembly; 51, first cylinder; 512, piston; 513, first solenoid valve; 52, second cylinder; 521, push plate; 522, push member; 523, second solenoid valve; 53, air source; 531, pressure reducing valve; 532, one-way valve; 533, pressure gauge; 534, vent valve;

[0036] 60. Control system; 61. Computer; 62. PLC control module; 63. Air pressure sensor. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the composition related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0038] refer to Figure 1-3 As shown, the utility model provides a device for automatically measuring the production of drilling mud filtrate, comprising a first frame 10 and a second frame 20 installed below the first frame 10, wherein a filter press assembly 30 for filtering drilling mud is installed on the first frame 10, and a measuring assembly 40 for collecting filtrate is installed on the second frame 20. A driving assembly 50 for driving the filter press assembly 30 and the measuring assembly 40 to realize automatic measurement of the production of filtrate is also provided on the first frame 10 and the second frame 20, and the driving assembly 50 is electrically connected to the control system 60. The control system 60 outputs a predetermined signal or instruction to the driving assembly 50, so that the driving assembly 50 drives the filter press assembly 30 and the measuring assembly 40 to automatically measure the production of filtrate for multiple times within at least one drilling shift.

[0039] refer to Figure 3 and Figure 4 As shown, in some embodiments, the filter press assembly 30 includes a base 32 mounted on the upper end surface of the second frame 20, a mud barrel 33 located above the base 32, and a stacking barrel 35 mounted on the base 32 and used to stack a plurality of filter paper discs 31. The base 32 includes a support plate 321 connected to the second frame 20, a first guide plate 322 connected to the support plate 321, and a second guide plate 324 installed between the support plate 321 and the first guide plate 322. A through hole 320 for filtrate to pass through is provided on the support plate 321, and the through hole 320 is located directly below the mud barrel 33. The size of the through hole 320 is smaller than the size of the filter paper disc 31, so as to prevent the filter paper disc 31 from falling from the through hole 320. A first guide groove 323 for guiding an unused filter paper disc 31 to reach directly below the mud barrel 33 is provided on the first guide plate 322, and a second guide plate 324 guides the used filter paper disc 31 to leave the second guide groove 325 directly below the mud barrel 33. In a top view, the intersection of the axes of the first guide groove 323 and the second guide groove 325 is located exactly at the center of the through hole 320 directly below the mud tube 33 .

[0040] In some embodiments, the mud barrel 33 is a hollow cylindrical structure with two ends open. When filtering mud, the lower end surface of the mud barrel 33 can form a seal with the upper end surface edge of the filter paper disc 31 to prevent mud leakage. After the filter press is completed, the lower end surface of the mud barrel 33 and the upper end surface edge of the filter paper disc 31 are released from the seal, which is convenient for replacing a new filter paper disc 31.

[0041] Recombination Figure 2 and Figure 3 As shown, the filter press assembly 30 also includes a sealing cylinder 34 fixed on the first frame 10, and the output end of the sealing cylinder 34 is fixedly connected to the mud barrel 33. In some embodiments, a sealing ring is embedded in the edge of the upper end surface of the filter paper disc 31. The sealing cylinder 34 can push the mud barrel 33 so that the lower end surface of the mud barrel 33 abuts against the edge of the upper end surface of the filter paper disc 31 and squeezes the sealing ring, so that the lower end surface of the mud barrel 33 and the upper end surface edge of the filter paper disc 31 form a sealing fit to prevent the mud in the mud barrel 33 from leaking. It should be noted that the filter paper disc 31 is well known to those skilled in the art and will not be described in detail here.

[0042] Recombination Figure 2 and Figure 3 As shown, in some embodiments, the stacking barrel 35 is also a hollow cylindrical structure with openings at both ends, and an outlet 351 for the filter paper disc 31 to pass through is provided between the lower end of the stacking barrel 35 and the base 32. The distance between the upper edge of the outlet 351 and the base 32 is greater than or equal to the thickness of the filter paper disc 31, so as to facilitate the passage of the filter paper disc 31. The technician can sequentially place a number of unused filter paper discs 31 into the stacking barrel 35 through the upper end opening of the stacking barrel 35. In some of the embodiments, at least 8 filter paper discs 31 can be placed in the stacking barrel 35 to meet the number of filter paper discs 31 required for measuring the amount of mud filtrate in at least one drilling shift. In a specific embodiment, 16 filter paper discs 31 can be placed in the stacking barrel 35 to meet the number of filter paper discs 31 required for measuring the amount of mud filtrate in two or more drilling shifts.

[0043] Reference again Figure 1-3As shown, in some embodiments, the measuring component 40 includes a mobile frame 41 disposed on the second frame 20, a fixing member 44 disposed on the mobile frame 41 and used to fix a plurality of measuring cylinders 42, and a motor 45 for rotating the fixing member 44. The mobile frame 41 can be slidably mounted on the second frame 20 through a guide rail (not shown), so that the mobile frame 41 can be located directly below the filter press assembly 30 during filter pressing, and away from the filter press assembly 30 when the filter paper disc 31 is replaced, thereby preventing the waste liquid or mud cake in the filter press assembly 30 from falling on the measuring component 40, avoiding the unused measuring cylinder 42 from being contaminated, so as to ensure the measurement accuracy of the filtrate. In some embodiments, a camera 43 for photographing the measuring cylinder 42 is provided on the fixing member 44. When the measuring cylinder 42 has filled the filtrate output once, the camera 43 can clearly photograph and obtain a picture of the scale at which the liquid level of the filtrate is located.

[0044] refer to Figure 5 and Figure 6 As shown, the fixing member 44 includes a placement plate 441 for placing the measuring cylinder 42, and a locking plate 443 hinged on the placement plate 441 and used to lock the measuring cylinder 42. The circumferential edge of the placement plate 441 has a plurality of placement grooves 442 radially opened along the placement plate 441, and the plurality of placement grooves 442 are evenly arranged along the circumference of the placement plate 441. The size of the placement groove 442 is adapted to the outer diameter of the measuring cylinder 42, so that the measuring cylinder 42 can be placed at the bottom of the placement groove 442. The edge of the locking plate 443 is provided with a locking groove 444 that is roughly L-shaped, and the side of the locking groove 444 away from the center of the locking plate 443 is a locking portion 445. The number of the locking grooves 444 is the same as the number of the placement grooves 442, and the locking grooves 444 are evenly arranged along the circumference of the locking plate 443. The locking plate 443 is coaxially hinged with the placement plate 441, so that the locking plate 443 can rotate a certain angle relative to the placement plate 441. The locking plate 443 and the placing plate 441 can limit the measuring cylinder 42 to prevent the measuring cylinder 42 from falling off the fixing member 44 .

[0045] Combination Figure 5 and Figure 6 As shown, when the axis of the placement groove 442 and the axis of the locking groove 444 along the radial direction of the locking disk 443 coincide, the measuring cylinder 42 can be placed at the bottom of the placement groove 442. When the locking disk 443 rotates a certain angle relative to the placement disk 441, the axis of the placement groove 442 and the axis of the locking groove 444 along the tangential direction of the locking disk 443 coincide, and the measuring cylinder 42 is simultaneously located at the bottom of the placement groove 442 and the locking groove 444. The bottom of the placement groove 442 and the locking portion 445 form a radial limit for the measuring cylinder 42 relative to the fixing member 44, and the bottom of the locking groove 444 and the edge of the placement groove 442 form a circumferential limit relative to the fixing member 44, thereby fixing a plurality of measuring cylinders 42 placed on the fixing member 44.

[0046] The motor 45 is fixed on the moving frame 41, and the output end of the motor 45 is fixedly connected to the fixing member 44. The motor 45 can drive the fixing member 44 to rotate a certain angle under the electrical drive of the external power supply according to the external instruction. When the moving frame 41 approaches the bottom of the filter press assembly 30, the motor 45 drives the fixing member 44 to rotate a certain angle, so that the unused measuring cylinder 42 can be located directly below the liquid outlet at the center of the filter paper disc 31, so that the filtrate can completely flow into the measuring cylinder 42, so as to improve the measurement accuracy of the filtrate yield.

[0047] Combination Figure 1 As shown, the measuring assembly 40 also includes a waste liquid tank 46 disposed at the bottom of the second frame 20, and a slide 47 disposed above the waste liquid tank 46 and connected to the base 32. After a filtrate yield measurement is completed, the used filter paper disc 31 and the waste mud can leave the mud tube 33 directly below along the second guide groove 325 under the flushing of the pressurized gas, and then move to the slide 47. Finally, the used filter paper disc 31 and the waste mud fall into the waste liquid tank 46 along the slide 47, waiting for the technicians to clean them up.

[0048] refer to Figure 1-3 and Figure 7 As shown, in some embodiments, the driving assembly 50 includes a first cylinder 51 disposed on the first frame 10 and used to extract mud from the mud barrel 33, a second cylinder 52 disposed on the second frame 20 and used to push the moving frame 41 and replace the filter paper disc 31, and an air source 53 connected to the first cylinder 51 and the second cylinder 52 through a pipeline. The output end of the first cylinder 51 is provided with a piston 512 capable of forming a sealing fit with the side wall of the mud barrel 33, and the piston 512 can define a cavity 331 for accommodating mud with the mud barrel 33 and the filter paper disc 31. The cavity 331 is connected to the air source 53 and a liquid supply device (not shown) for providing mud through a pipeline. A first solenoid valve 513 is provided on the pipeline between the input end of the first cylinder 51 and the air source 53, and the first solenoid valve 513 can control the moving direction of the piston 512 connected to the output end of the first cylinder 51 relative to the mud barrel 33. In a specific embodiment, after the mud barrel 33 and the unused filter paper disc 31 form a sealed fit, the cavity 331 is disconnected from the air source 53, and the liquid supply device is connected to the cavity 331. The first solenoid valve 513 controls the piston 512 at the output end of the first cylinder 51 to move upward relative to the mud barrel 33, so that negative pressure is generated in the cavity 331, and the mud in the liquid supply device enters the cavity 331.

[0049] In some embodiments, a push plate 521 is installed at the output end of the second cylinder 52. A push piece 522 capable of being inserted into the bottom of the stacking barrel 35 is installed at the upper end of the push plate 521, and the lower end of the push plate 521 is fixedly connected to the moving frame 41. A second solenoid valve 523 is provided on the pipeline between the input end of the second cylinder 52 and the gas source 53, and the movement of the push plate 521 at the output end of the second cylinder 52 can be controlled by the second solenoid valve 523. In a specific embodiment, when it is necessary to measure the yield of the filtrate, the gas source 53 provides pressurized gas to the second cylinder 52 through the second solenoid valve 523, so that the second cylinder 52 drives the push plate 521 to move horizontally in the direction close to the filter press assembly 30. At this time, the push piece 522 is inserted into the bottom of the stacking barrel 35, and pushes the filter paper disc 31 located at the bottom of the stacking barrel 35 to move along the first guide groove 323 to the bottom of the mud barrel 33. At the same time, an unused measuring cylinder 42 on the moving frame 41 moves to the position directly below the liquid outlet of the filter paper disc 31. In another specific embodiment, when the filtrate yield is measured, the gas source 53 reversely provides pressurized gas to the second cylinder 52 through the second solenoid valve 523, so that the second cylinder 52 drives the push plate 521 to move horizontally away from the filter press assembly 30. At this time, the push member 522 leaves the bottom of the stacking cylinder 35, and an unused filter paper disc 31 falls into the end of the first guide groove 323 and waits for the next measurement. At the same time, the moving frame 41 moves horizontally away from the filter press assembly 30.

[0050] In some embodiments, a pressure reducing valve 531 for setting the pressure required for pressurized filtration is provided on the pipeline between the cavity 331 and the gas source 53, and a one-way valve 532 for limiting the flow direction of the gas is provided between the pressure reducing valve 531 and the cavity 331. In a specific implementation, the gas source 53 provides a certain pressure of gas to the cavity 331 in one direction according to the pressure value set by the pressure reducing valve 531, and the gas is located between the piston 512 and the mud in the mud tube 33 to achieve pressure filtration of the mud. In some embodiments, the gas source 53 can be a high-pressure gas tank or an air compressor. The output end of the gas source 53 is also provided with a pressure gauge 533 for detecting the residual gas pressure in the pipeline and a vent valve 534 for releasing the residual pressurized gas in the pipeline, so as to improve the safety of the entire device and avoid accidents.

[0051] Combination Figure 7As shown, in some embodiments, the control system 60 includes a computer 61 and a PLC control module 62 electrically connected to the computer 61, and the PLC control module 62 is electrically connected to the first solenoid valve 513 and the second solenoid valve 523. The computer 61 sends a predetermined program to the first solenoid valve 513 and the second solenoid valve 523 in the form of an instruction through the PLC control module 62, thereby controlling the operating state of the first cylinder 51 and the second cylinder 52. The computer 61 is also electrically connected to the camera 43, and the camera 43 takes a picture of the scale at which the liquid level of the filtrate is located and can be transmitted to the computer 61 in a timely manner. The computer 61 can obtain the output of the filtrate through a preset image recognition program. The PLC control module 62 is also electrically connected to the one-way valve 532 and the vent valve 534, thereby controlling the gas output of the gas source 53. In some embodiments, the control system 60 further includes a temperature / pressure monitoring module electrically connected to the computer 61, and the temperature / pressure monitoring module is electrically connected to the air pressure sensor 63 installed on the pipeline between the cavity 331 and the one-way valve 532, so as to facilitate the collection of the filtration pressure in the mud tube 33. The temperature / pressure monitoring module is also electrically connected to a temperature sensor (not shown) installed in the mud tube 33, so as to facilitate the collection of the temperature of the mud in the cavity 331.

[0052] The process of the device for automatically measuring the drilling mud filtrate production provided by the utility model is as follows. The technician places enough unused filter paper discs 31 in the stacking cylinder 35 in advance, and places the same number of measuring cylinders 42 as the filter paper discs 31 on the fixing member 44. The number of filter paper discs 31 and measuring cylinders 42 should be sufficient for at least one shift. Adjust the pressure reducing valve 531 and set the output pressure of the pressure reducing valve 531 to the predetermined pressure required for the filter press. Close the vent valve 534, and then open the valve of the gas source 53 output port.

[0053] Under the electrical drive of the external power supply, the computer 61 sends a signal to the PLC control module 62 according to a predetermined program, and the PLC control module 62 sends a command to the second solenoid valve 523 to make the second solenoid valve 523 positively attracted. The air source 53 provides pressurized gas to the second cylinder 52 through the second solenoid valve 523, so that the second cylinder 52 drives the push plate 521 to move horizontally in the direction close to the filter press assembly 30. At this time, the push member 522 is inserted into the bottom of the stacking barrel 35, and pushes the filter paper disc 31 located at the bottom of the stacking barrel 35 to move along the first guide groove 323 to the bottom of the mud barrel 33. At the same time, an unused measuring cylinder 42 on the moving frame 41 moves to the bottom of the liquid outlet of the filter paper disc 31. Then the sealing cylinder 34 pushes the mud barrel 33 so that the lower end surface of the mud barrel 33 abuts against the upper end surface edge of the filter paper disc 31 and squeezes the sealing ring, so that the lower end surface of the mud barrel 33 and the upper end surface edge of the filter paper disc 31 form a sealing fit.

[0054] The PLC control module 62 then issues a command to the first solenoid valve 513, causing the first solenoid valve 513 to be positively attracted. The gas source 53 provides pressurized gas to the first cylinder 51 through the first solenoid valve 513, causing the piston 512 at the output end of the first cylinder 51 to move upward relative to the mud barrel 33, causing negative pressure to be generated in the cavity 331, and the mud in the liquid supply device enters the cavity 331. At the same time, the PLC control module 62 records the movement of the piston 512, and then converts it into the volume value of the mud and sends it to the computer 61 for storage.

[0055] The PLC control module 62 sends a command to the one-way valve 532 to open the one-way valve 532. The gas from the gas source 53 is injected into the cavity 331 at the predetermined pressure through the pressure reducing valve 531. Under the action of the air pressure, the liquid component in the mud passes through the filter paper on the filter paper disc 31 and falls into the measuring cylinder 42 below from the liquid outlet of the filter paper disc 31, thereby obtaining the filtrate. After the predetermined time required for the filter press is reached, the one-way valve 532 is closed, thereby completing the collection of the mud filtrate. The camera 43 takes a picture of the scale at which the liquid level of the filtrate is located and transmits it to the computer 61 in a timely manner. The computer 61 can obtain the yield of the filtrate through a preset image recognition program.

[0056] The PLC control module 62 sends a command to the second solenoid valve 523, causing the second solenoid valve 523 to close in the reverse direction. The air source 53 provides pressurized gas to the second cylinder 52 in the reverse direction through the second solenoid valve 523, so that the second cylinder 52 drives the push plate 521 to move horizontally in a direction away from the filter press assembly 30. At this time, the push member 522 leaves the bottom of the stacking cylinder 35, and an unused filter paper disc 31 falls into the end of the first guide groove 323 and waits for the next measurement. At the same time, the moving frame 41 moves horizontally in a direction away from the filter press assembly 30.

[0057] The sealing cylinder 34 drives the mud barrel 33 to move upward, so that the lower end surface of the mud barrel 33 abuts against the upper end surface of the filter paper disc 31 to release the sealing fit. The PLC control module 62 sends a command to the first solenoid valve 513 to make the first solenoid valve 513 positively attracted. The piston 512 of the first cylinder 51 moves to the lower end of the mud barrel 33 to squeeze out all the remaining mud in the mud barrel 33. The one-way valve 532 is opened again, and the high-pressure gas sweeps the used filter paper disc 31 and the remaining mud under the mud barrel 33. Under the flushing of the pressurized gas, the used filter paper disc 31 and the remaining mud leave the mud barrel 33 directly below along the second guide groove 325, and then move to the slide 47. The used filter paper disc 31 and the waste mud fall into the waste liquid tank 46 along the slide 47, waiting for the technicians to clean up collectively. Finally, the PLC control module 62 outputs instructions to return the filter press assembly 30 and the measuring assembly 40 to their original states, waiting for the next test cycle or stopping the test.

[0058] When at least one shift is finished, the technician can view the measured data of each shift on the computer 61, including the filtrate production of the mud, the temperature of the mud, the filtration pressure, etc. Based on these data, the technician can obtain the supporting data for the determination of the wellbore stability in real time during the drilling construction, and timely evaluate the filtration and wall-building performance of the drilling mud, and then make timely adjustments to the on-site drilling mud operation.

[0059] Based on the above-mentioned device for automatically measuring the filtrate production of drilling mud, the utility model also provides different systems of water-based drilling mud and oil-based drilling mud, and measures the filtrate production indoors and on-site. The measurement results of the device are compared with the results measured manually using a conventional filtration meter to evaluate the measurement accuracy of the device.

[0060] Test Example 1:

[0061] The test slurry 1 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of fresh water, 4 parts of bentonite, 0.3 parts of caustic soda, 0.3 parts of polyacrylamide, 0.6 parts of ammonium salt, 0.5 parts of low-viscosity sodium carboxymethyl cellulose, 1 part of sulfonated phenolic resin, 1.5 parts of high temperature and salt resistance fluid loss reducer, 0.6 parts of sulfonated tannin, 1 part of solid wetting agent, 3 parts of waterproof lock agent, 2.5 parts of extreme pressure lubricant, and 2 parts of ultrafine calcium carbonate.

[0062] Test Example 2:

[0063] The test slurry 2 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of fresh water, 4 parts of bentonite, 0.3 parts of caustic soda, 0.3 parts of polyacrylamide, 0.6 parts of ammonium salt, 1 part of low-viscosity sodium carboxymethyl cellulose, 2 parts of sulfonated phenolic resin, 2 parts of high temperature and salt resistance fluid loss reducer, 1 part of sulfonated tannin, 1 part of solid wetting agent, 3 parts of waterproof lock agent, 2.5 parts of extreme pressure lubricant, and 3 parts of ultrafine calcium carbonate.

[0064] Test Example 3:

[0065] The test slurry 3 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of fresh water, 4 parts of bentonite, 0.3 parts of soda ash, 0.5 parts of potassium polyacrylate, 0.8 parts of high temperature and salt resistance fluid loss reducer, 0.6 parts of low viscosity carboxymethyl cellulose sodium salt, 0.3 parts of ultra-high temperature fluid loss reducer, 0.5 parts of drilling fluid fluid loss reducer, 1 part of asphalt copolymer, 1 part of sulfomethyl phenolic resin, and 3 parts of white oil lubricant.

[0066] Test example 4:

[0067] The test slurry 4 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of fresh water, 4 parts of bentonite, 0.3 parts of soda ash, 0.5 parts of potassium polyacrylate, 1.2 parts of high temperature and salt resistance fluid loss reducer, 1 part of low viscosity carboxymethyl cellulose sodium salt, 0.5 parts of ultra-high temperature fluid loss reducer, 0.5 parts of sulfonate copolymer of drilling fluid fluid loss reducer, 2 parts of asphalt copolymer, 2 parts of sulfomethyl phenolic resin, and 3 parts of white oil lubricant.

[0068] Test Example 5:

[0069] The test slurry 5 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components in parts by weight: 100 parts of seawater, 4 parts of bentonite, 0.15 parts of potassium polyacrylate, 6 parts of organic salt, 0.5 parts of modified ammonium salt, 3 parts of activity regulator, 3 parts of multi-graded ideal filling plugging agent, 1.5 parts of solid polyol, 1.5 parts of drilling fluid plugging agent, 0.6 parts of natural polymer fluid loss reducer, 1 part of sulfomethyl phenolic resin, 0.5 parts of sulfonate copolymer of fluid loss reducer for drilling fluid, 0.5 parts of environmental inhibitor, and 3 parts of oil-based lubricant.

[0070] Test Example 6:

[0071] The test slurry 6 used in this test example is a water-based drilling mud prepared in the laboratory, including the following components in parts by weight: 100 parts of seawater, 4 parts of bentonite, 0.3 parts of potassium polyacrylate, 9 parts of organic salt, 0.75 parts of modified ammonium salt, 5 parts of activity regulator, 3 parts of multi-graded ideal filling plugging agent, 3 parts of solid polyol, 2.5 parts of drilling fluid plugging agent, 0.9 parts of natural polymer fluid loss reducer, 2 parts of sulfomethyl phenolic resin, 0.5 parts of sulfonate copolymer of fluid loss reducer for drilling fluid, 0.5 parts of environmental inhibitor, and 5 parts of oil-based lubricant.

[0072] Test Example 7:

[0073] The test slurry 7 used in this test example is an oil-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of base oil, 3 parts of organic soil, 2 parts of primary emulsifier, 1 part of auxiliary emulsifier, 1.5 parts of wetting agent, 1 part of calcium oxide, 1 part of oxidized asphalt, and 25 parts of calcium chloride aqueous solution.

[0074] Test Example 8:

[0075] The test slurry 8 used in this test example is an oil-based drilling mud prepared in the laboratory, including the following components by weight: 100 parts of base oil, 3 parts of organic soil, 1.5 parts of primary emulsifier, 1.5 parts of auxiliary emulsifier, 1 part of wetting agent, 1 part of calcium oxide, 2 parts of oxidized asphalt, and 25 parts of calcium chloride aqueous solution.

[0076] Test Example 9:

[0077] The test slurry 9 used in this test example is the field slurry of the three-opening water-based drilling fluid of the CB32B-8 well in Shengli Chengbei Oilfield, including the following components by weight: 100 parts of seawater, 4 parts of bentonite, 0.3 parts of caustic soda, 0.3-0.5 parts of natural polymer modified by strong coated inhibitor for drilling fluid, 0.5 parts of environmental inhibitor, 8-10 parts of organic salt, 3-5 parts of activity regulator, 0.3-0.5 parts of modified ammonium salt, 1-2 parts of natural polymer filtration reducer, 2-3 parts of non-fluorescent white oil lubricant, 2-3 parts of wellbore stabilizer, 0.5 parts of sulfonate copolymer, 2-3 parts of sulfonated phenolic resin, 3-5 parts of multi-graded filling plugging agent, 2 parts of solid polyol, and 1 part of pressure-bearing plugging agent for drilling fluid.

[0078] Test Example 10:

[0079] The test slurry 10 used in this test example is the Shengli Niuye 1-3-404HF well three-opening synthetic base drilling fluid field slurry, including the following components by weight: 80-85 parts of synthetic base fluid, 25 parts of calcium chloride aqueous solution, 2-4 parts of primary emulsifier, 1.5-3 parts of auxiliary emulsifier, 1-3 parts of wetting agent, 3-5 parts of alkalinity regulator, 3-4 parts of organic soil, 1-2 parts of oil-based plugging agent, and 5-8 parts of ultrafine calcium carbonate.

[0080] Example 1

[0081] The test pulps 1 to 10 in test examples 1 to 10 were respectively measured by the device and measured manually, and the results of the device and manual measurements of different test pulps were compared in Table 1. From the data in Table 1, it can be seen that the error between the results of the device measurement and the manual measurement is within ±4.92%, indicating that the results of the device measurement have high accuracy, and also that the device has good applicability.

[0082] Table 1. Comparison of the results of different test pulps measured by the device and manually

[0083] Test pulp Filtrate volume (measured by the device) / mL Filtrate volume (manual determination) / mL Relative error / % Test pulp 1 5.875 5.6 4.91 Test pulp 2 3.655 3.8 -3.82 Test pulp 3 6.956 7.2 -3.39 Test pulp 4 5.426 5.2 4.35 Test pulp 5 4.812 4.6 4.61 Test pulp 6 3.141 3 4.7 Test pulp 7 1.553 1.6 -2.9 Test pulp 8 1.141 1.2 -4.92 Test pulp 9 4.565 4.4 4.51 Test pulp 10 1.153 1.2 -3.92

[0084] Example 2

[0085] The test mud 9 in Test Example 9 was measured 1236 times continuously at a frequency of 9 minutes / time by the device for several consecutive days, and was measured manually 8 times at any time during the period, and the results of the device and manual measurement of water-based drilling mud were compared in Table 2. From the data in Table 1, it can be seen that the maximum error between the results of the device measurement and the manual measurement does not exceed 4.51%, indicating that the stability of the device is good during long-term operation.

[0086] Table 2. Comparison of the results of the device and manual measurement of water-based drilling mud at any time within a few days

[0087]

[0088] Example 3

[0089] The test pulp 10 in Test Example 10 was measured 3061 times continuously at a frequency of 12 minutes / time by the device over several consecutive days, and was measured manually 9 times at any time during the period, and the comparison between the device measurement and manual measurement results was obtained in Table 3. From the data in Table 1, it can be seen that the maximum error between the device measurement and the manual measurement results does not exceed 3.92%, indicating that the device has high measurement accuracy and good operating stability, and once again shows that the device has good applicability.

[0090] Table 3. Comparison of the results of the device and manual measurement of oil-based drilling mud at any time within a few days

[0091]

[0092] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0094] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A device for automatically measuring the production of drilling mud filtrate, characterized in that: include A filter press assembly (30) comprises a base (32) mounted on a first frame (10), a mud cylinder (33) located above the base (32) and used to contain mud, and a stacking cylinder (35) mounted on the base (32) and used to stack unused filter paper discs (31); A measuring assembly (40) comprising a moving frame (41) mounted on a second frame (20), wherein the second frame (20) is located below the first frame (10), and a measuring cylinder (42) for measuring filtrate is mounted on the moving frame (41); and A driving assembly (50) comprising a first cylinder (51) and a second cylinder (52); The first cylinder (51) is configured to deliver mud to the cavity (331) in the mud barrel (33) multiple times during at least one drilling shift. The second cylinder (52) is configured to push the filter paper plate (31) in the stacking cylinder (35) to the bottom of the mud cylinder (33) multiple times, and simultaneously push the moving frame (41) to the bottom of the filter press assembly (30), so that the measuring cylinder (42) can receive the filtrate.

2. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: The filter paper disc (31) is configured to be able to seal and cooperate with the mud barrel (33) when pushed below the mud barrel (33), so that the cavity (331) is defined by the side wall of the mud barrel (33), the filter paper disc (31), and a piston (512) installed at the output end of the first cylinder (51).

3. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: The base (32) comprises a support plate (321) and a first guide plate (322) mounted on the support plate (321), wherein the first guide plate (322) is provided with a first guide groove (323) for guiding the filter paper disc (31) in the stacking barrel (35) to below the mud barrel (33).

4. The device for automatically measuring the production of drilling mud filtrate according to claim 3, characterized in that: A second guide plate (324) is installed between the first guide plate (322) and the support plate (321), and the second guide plate (324) is provided with a second guide groove (325) for guiding the used filter paper disc (31) to fall into the waste liquid tank (46) along the second frame (20).

5. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: The filter press assembly (30) further comprises a sealing cylinder (34) mounted on the first frame (10), wherein an output end of the sealing cylinder (34) is connected to the mud barrel (33), so that the lower end surface of the mud barrel (33) can form or release a sealing fit with the filter paper disc (31).

6. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: A fixing member (44) for fixing a plurality of measuring cylinders (42) is installed on the movable frame (41), and the fixing member (44) comprises a placement plate (441) and a locking plate (443) installed on the placement plate (441), and the locking plate (443) is configured to be coaxially rotatable relative to the placement plate (441) to lock the measuring cylinders (42).

7. The device for automatically measuring the production of drilling mud filtrate according to claim 6, characterized in that: The edge of the placement plate (441) is evenly provided with a plurality of placement grooves (442); the edge of the locking plate (443) is evenly provided with locking grooves (444) corresponding to the placement grooves (442); the locking grooves (444) include locking portions (445); and the locking portions (445) are configured to limit the measuring cylinder (42) within the locking grooves (444) and the placement grooves (442) when the locking plate (443) is rotated at a certain angle relative to the placement plate (441).

8. The device for automatically measuring the production of drilling mud filtrate according to claim 6, characterized in that: The movable frame (41) is also provided with a motor (45) for driving the fixed member (44) to rotate. The motor (45) is configured to move the unused measuring cylinder (42) to below the filter paper plate (31) under the mud cylinder (33).

9. The device for automatically measuring the production of drilling mud filtrate according to any one of claims 1 to 8, characterized in that: The invention also includes a control system (60), wherein the control system (60) includes a computer (61) and a PLC control module (62) electrically connected to the computer (61), wherein the PLC control module (62) is electrically connected to a first solenoid valve (513) provided at the input end of the first cylinder (51) and a second solenoid valve (523) provided at the input end of the second cylinder (52), so that the first cylinder (51) and the second cylinder (52) can perform actions according to a predetermined program in the computer (61).

10. The device for automatically measuring the production of drilling mud filtrate according to claim 9, characterized in that: The computer (61) is electrically connected to a camera (43) installed on the second frame (20), and the computer (61) can process the image captured by the camera (43) through an image recognition program and obtain the yield of the filtrate.

11. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: A push plate (521) is provided at the output end of the second cylinder (52), and a push piece (522) is installed on the upper part of the push plate (521), so that when the push piece (522) pushes the filter paper disc (31) to the bottom of the mud barrel (33), the lower part of the push plate (521) pushes the movable frame (41) to the bottom of the filter press assembly (30).

12. The device for automatically measuring the production of drilling mud filtrate according to claim 1, characterized in that: The cavity (331) is connected to the gas source (53) via a pressure reducing valve (531) for setting the pressure required for pressurized filtration, and a one-way valve (532) is provided between the pressure reducing valve (531) and the cavity (331), so that the gas can only flow from the pressure reducing valve (531) to the cavity (331).

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