A device and method for testing ultra-deep well drilling tool parts in a simulated environment
By designing a test device in the practical environment of the extra-deep well drilling tool parts, simulating the actual working conditions of the extra-deep well, solving the problems of direct testing difficulties and risks underground, realizing performance and life tests of the drilling tool parts, and reducing R&D costs.
Patent Information
- Application Number
- CN202510044609.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-12
- Publication Date
- 2025-04-04
AI Technical Summary
In extra-deep well drilling, testing of drilling tool parts directly underground is difficult and there are unknown risks, which increases R&D costs.
Design a test device in the actual environment of the special-deep well drilling tool parts, including a base frame, a box, a hydraulic motor, a hydraulic cylinder, an electric heater, a vibration sensor and a torque sensor, to simulate the actual working conditions of the special-deep well, and conduct performance tests and life tests of shaft seals, PDC thrust bearings and TC bearings.
By simulating the underground environment, the performance and life test of drilling tool parts can be completed under realistic conditions, the defects of the measured parts can be discovered in advance, the R&D costs can be reduced, and the number of tests can be reduced in the actual underground environment.
Smart Images
Figure CN119756862A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of drilling tool testing, and in particular to a device and method for testing ultra-deep well drilling tool parts in a simulated environment. Background Art
[0002] In ultra-deep well drilling, due to the extreme and complex actual working environment, testing drill tool parts directly underground is not only difficult to collect data, but also may face many unknown risks, and increase R&D costs. Therefore, it is particularly important to develop a device and method for testing ultra-deep well drill tool parts in a simulated environment. Through this simulation test device, drill tool parts can be fully tested and optimized on the ground, thereby reducing the number of tests in the actual underground environment, reducing risks and costs. Summary of the invention
[0003] Based on the above problems, the purpose of the present invention is to provide a testing device and method for ultra-deep well drilling tool parts in a simulated environment, which can simulate the actual working conditions of ultra-deep wells to the greatest extent, present the invisible and complex underground environment through a test bench, and complete the performance test and life test of key components of drilling tools including shaft seals, PDC thrust bearings, and TC bearings in a simulated environment.
[0004] The technical solution adopted by the present invention to achieve its invention purpose is a device and method for testing ultra-deep well drilling tool parts in a simulated environment, including a base frame, a box, a hydraulic motor, a hydraulic cylinder, an electric heater, a vibration sensor, a torque sensor, and a first shaft system, wherein: The box is fixedly installed on the base frame, and high-temperature oil is filled in the box; the electric heater is fixedly installed in the box and is located below the oil surface of the high-temperature oil; the electric heater is used to heat the oil to the required experimental temperature, and multiple temperature probes are arranged around the cabin to detect the temperature of the high-temperature oil and the surrounding temperature of the box in real time; the high-temperature oil is used as the heat transfer medium of the test platform, and each test piece rotates in the high-temperature oil under power drive and adds corresponding loads; The hydraulic cylinder is fixedly installed on the base frame on the left side of the box body. The output shaft of the hydraulic cylinder is connected to the push rod through the pressure sensor. After the push rod passes through the through hole on the left side wall of the box body, the push plate fixedly connected to the right end of the push rod is fixedly connected to the left static ring of the shaft seal to be tested; the part of the push rod in the box body is sleeved in the bellows expansion joint, and the two ends of the bellows expansion joint are respectively connected to the inner wall of the cabin and the push plate through flanges; The specific structure of the first axis system is: A PDC bearing seat (901) is fixedly connected to the right side of the shaft seal (8) to be tested, and the PDC thrust bearing (10) to be tested is fixedly installed on the PDC bearing seat (901). A TC bearing seat (902) is fixedly installed at a certain distance on the right side of the PDC bearing seat (901). The TC bearing (11) to be tested is installed on the TC bearing seat (902). A third bearing seat (903) is fixedly installed at a certain distance on the right side of the TC bearing seat (902). A transmission shaft (904) passes through and is matched with the bearings in the PDC thrust bearing (10) to be tested, the TC bearing (11) to be tested, and the third bearing seat (903) in sequence. A torque sensor is installed between the transmission shaft (904) and the sprocket (907). The left end of the transmission shaft (904) is fixedly connected to the right side moving ring (802) of the shaft seal (8) to be tested through a connecting plate (905). The push plate, the connecting plate, the PDC bearing seat, the TC bearing seat and the third bearing seat are all installed in the box body; The transmission shaft is connected to the output shaft of the hydraulic motor through a chain sprocket transmission mechanism; The hydraulic motor is fixedly mounted on a base frame outside the box; The vibration sensor is mounted on the PDC thrust bearing (10) and the TC bearing (11); Furthermore, a spline sleeve is fixedly mounted on the base frame on the left side of the box body. The push rod passes through the spline sleeve and then through the through hole on the left side wall of the box body to extend into the box body. The push rod and the spline sleeve are connected by a rectangular spline.
[0005] Since the friction coefficient of the shaft seal is about 0.15 under working condition, when the dynamic ring and the static ring of the shaft seal rotate relative to each other and grind, a certain rotational torque will be generated on the push rod at the left end of the mechanical seal. Therefore, the push rod part is designed as a rectangular spline structure, and a rectangular spline is used to connect the push rod and the spline sleeve to prevent the push rod from rotating.
[0006] The beneficial effects of the present invention are: It can simulate the actual working conditions of ultra-deep wells to the greatest extent, display the invisible and complex underground environment through the test device, and complete the performance test and life test of key components of drilling rigs including shaft seals, PDC thrust bearings, and TC bearings in a simulated environment. It can discover the defects and deficiencies of the tested parts in advance, provide test data for the design of the tested parts, thereby improving the structure and reducing R&D costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 A schematic diagram of a three-dimensional appearance of an embodiment of the present invention; Figure 2 A top view of the first shaft system and related components of an embodiment of the present invention; Figure 3 for Figure 2 Section view along AA; Figure 4 This is a schematic diagram of the structure of a spline sleeve according to an embodiment of the present invention. DETAILED DESCRIPTION
[0008] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0009] Figures 1 to 4 A specific embodiment of the device for testing ultra-deep well drilling tool parts in a virtual environment provided by the present invention is shown, comprising a base frame 1, a box body 2, a hydraulic motor 5, a hydraulic cylinder 7, an electric heater 11, and a first shaft system, wherein: The box body 2 is fixedly mounted on the base frame 1 , and high temperature oil is contained in the box body 2 ; the electric heater 7 is fixedly mounted in the box body 2 and is located below the oil level of the high temperature oil; and a plurality of temperature probes 201 are arranged around the box body 2 .
[0010] The hydraulic cylinder 7 is fixedly mounted on the base frame 1 on the left side of the box body 2. The output shaft of the hydraulic cylinder 7 is connected to the push rod 702 through the pressure sensor 701. After the push rod 702 passes through the through hole on the left side wall of the box body 2, the push plate 703 fixedly connected to the right end of the push rod 702 is fixedly connected to the left static ring 801 of the shaft seal 8 to be tested; the part of the push rod 702 in the box body 2 is sleeved in the bellows expansion joint 804, and the two ends of the bellows expansion joint 804 are respectively connected to the inner wall of the box body 2 and the push plate 703 through the flange 705; The specific structure of the first axis system is: A PDC bearing seat (901) is fixedly connected to the right side of the shaft seal (8) to be tested, and the PDC thrust bearing (10) to be tested is fixedly installed on the PDC bearing seat (901). A TC bearing seat (902) is also fixedly installed at a certain distance on the right side of the PDC bearing seat (901). The TC bearing (11) to be tested is installed on the TC bearing seat (902). A third bearing seat (903) is further fixedly installed at a certain distance on the right side of the TC bearing seat (902). A transmission shaft (904) passes through and is fitted on the PDC thrust bearing (10) to be tested, the TC bearing (11) to be tested, and the bearing in the third bearing seat (903) in sequence. The left end of the transmission shaft (904) is fixedly connected to the right side moving ring (802) of the shaft seal (8) to be tested through a connecting plate (905). The transmission shaft 904 is connected to the output shaft of the hydraulic motor 6 through a chain sprocket transmission mechanism; the hydraulic motor 6 is fixedly mounted on the base frame 1 outside the box body 2; In this embodiment, a spline sleeve 706 is fixedly installed on the base frame 1 on the left side of the box body 2. The push rod 702 passes through the spline sleeve 706 and then passes through the through hole on the left side wall of the box body 2 to extend into the box body 2. The push rod 702 and the spline sleeve 706 are connected by a rectangular spline.
[0011] Each of the tested parts including the shaft seal 8, the PDC thrust bearing 10, and the TC bearing 11 rotates in high-temperature oil under power drive and a corresponding load is added.
[0012] The method and principle of using the test platform of the present invention to test the shaft seal, PDC thrust bearing and TC bearing of drilling tools are as follows: When testing the shaft seal 8, the hydraulic cylinder 7 applies an axial load to the stationary ring 801 through the push rod 702 and the push plate 703. The stationary ring 801 remains stationary, while the dynamic ring 802 rotates under the drive of the transmission shaft 904, and relative wear occurs between the dynamic ring 802 and the stationary ring 801. The axial load borne by the shaft seal 8 can be measured by the above device and the pressure sensor 701. The hydraulic cylinder 7 applies a pressure of 9 tons to keep the shaft seal 8 in a sealed state, and the pressure is also transmitted to the PDC thrust bearing 10, constituting its axial load. In this case, the second shaft system achieves rotational separation at the shaft seal 8. Since the friction coefficient of the shaft seal 8 is about 0.15 when working, a certain rotational torque will be generated at the left end of the push rod 702. In order to prevent the push rod 702 from rotating, a rectangular spline connection is adopted between it and the spline sleeve 706. The torque required by the TC bearing and the PDC thrust bearing when working under the action of pressure can be tested by the torque sensor. The vibration condition of the TC bearing and the PDC thrust bearing in the working state can be tested by the vibration sensor.
[0013] When testing the PDC thrust bearing 10 and the TC bearing 11, the corresponding bearing seats fix their stationary rings, the transmission shaft 904 drives the dynamic rings, and the dynamic rings and the static rings are rubbed against each other, so that the radial load and axial load of the PDC thrust bearing 10 and the TC bearing 11 can be tested.
[0014] The above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.
Claims
1. A device and method for testing ultra-deep well drilling tool parts in a simulated environment, characterized in that: It comprises a base frame (1), a box body (2), a pressure motor (5), a hydraulic motor (6), a hydraulic cylinder (7), an electric heater (11), a vibration sensor, a torque sensor, and a first shaft system, wherein: The cabin (2) is fixedly mounted on the base (1), and high-temperature oil is contained in the cabin (2); the electric heater (13) is fixedly mounted in the cabin (2) and is located below the oil level of the high-temperature oil; a plurality of temperature probes (201) are arranged around the cabin (2); The hydraulic cylinder (7) is fixedly mounted on a base frame (1) on the left side of the housing (2); the output shaft of the hydraulic cylinder (11) is connected to the push rod (702) via a pressure sensor (701); after the push rod (702) passes through a through hole on the left side wall of the housing (2), a push plate (703) fixedly connected to the right end of the push rod (702) is fixedly connected to the left static ring (801) of the shaft seal (8) to be tested; the part of the push rod (702) inside the housing (2) is sleeved in a bellows expansion joint (704); and the two ends of the bellows expansion joint (704) are respectively connected to the inner wall of the housing (2) and the push plate (703) via flanges (705); The specific structure of the first axis system is: A PDC bearing seat (901) is fixedly installed on the right side of the shaft seal (8) to be tested, a PDC thrust bearing (10) to be tested is fixedly installed on the PDC bearing seat (901), a TC bearing seat (902) is also fixedly installed on the right side of the PDC bearing seat (901) at a certain distance, a TC bearing (11) to be tested is fixedly installed on the TC bearing seat (902), a third bearing seat (903) is also fixedly installed on the right side of the TC bearing seat (902) at a certain distance, a transmission shaft (904) passes through and is matched with the bearings of the PDC thrust bearing (10) to be tested, the TC bearing (11) to be tested and the third bearing seat (903) in sequence, a torque sensor is installed between the transmission shaft (904) and the sprocket (907), and the left end of the transmission shaft (904) is fixedly connected to the right side moving ring (802) of the shaft seal (8) to be tested through a connecting plate (905); The transmission shaft (904) is connected to the output shaft of the hydraulic motor (6) via a chain and sprocket transmission mechanism; The vibration sensor is mounted on the PDC thrust bearing (10) and the TC bearing (11); The hydraulic motor (6) is fixedly mounted on a base frame (1) outside the box body (2).
2. The device for testing ultra-deep well drilling tool parts in a virtual environment according to claim 1, characterized in that: A spline shaft sleeve (706) is also fixedly mounted on the base frame (1) on the left side of the box body (2); the push rod (702) passes through the spline shaft sleeve (706) and then passes through the through hole on the left side wall of the box body (2) to extend into the box body (2); the push rod (702) and the spline shaft sleeve (706) are connected by a rectangular spline.