Indoor real simulation test device for high-temperature-resistant transmission shaft assembly of extra-deep well

Abstract

An indoor real simulation test device for a high-temperature-resistant transmission shaft assembly of an extra-deep well relates to the technical field of drilling rig testing and mainly structurally comprises a base station, a cabin body, a cabin cover, a hydraulic motor, an electric heater, a hydraulic cylinder, a second shaft system, a longitudinal vibration mechanism and a second transverse vibration motor module. Wherein the second shaft system connects a mechanical seal to be tested, a PDC bearing and a TC bearing in series in one shaft system for testing, the hydraulic cylinder provides an axial load, the hydraulic motor serves as a power source to transmit power to the second shaft system through the chain and chain wheel transmission mechanism, and the longitudinal vibration mechanism and the second transverse vibration motor module simulate a vibration environment. According to the invention, the performance test and the service life test of the key components of the drilling rig such as a mechanical seal, a PDC bearing and a TC bearing can be completed in a quasi-real environment.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling tool testing, in particular to an indoor simulated testing device for an ultra-deep well high-temperature resistant transmission shaft assembly. Background Art

[0002] The actual working environment of ultra-deep wells is thousands or even tens of thousands of meters underground. If the workpiece is tested directly underground, it will make it difficult to collect test data. There are too many unknown factors underground, which is very risky. Repeated testing will also greatly increase R&D costs. Therefore, there is an urgent need to develop a testing device in a simulated environment to replace testing in an actual working environment. Summary of the Invention

[0003] Based on the above problems, the purpose of the present invention is to provide an indoor simulation test device for ultra-deep well high-temperature resistant drive shaft assemblies, 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 performance testing and life testing of key components of drilling equipment including mechanical seals, PDC bearings, and TC bearings in a simulated environment.

[0004] The technical solution adopted by the present invention to achieve its invention object is: an indoor simulation test device for an ultra-deep well high-temperature resistant transmission shaft assembly, including a base, a cabin, a hatch, a hydraulic motor, an electric heater, a hydraulic cylinder, a second shaft system, a longitudinal vibration mechanism, and a second transverse vibration motor module, wherein:

[0005] The cabin is fixedly installed on the base, the hatch cover is placed on the cabin, and the cabin is filled with high-temperature oil; the electric heater is fixedly installed in the cabin and is located below the oil level of the high-temperature oil; and multiple temperature sensors are arranged around the cabin.

[0006] The hydraulic cylinder is fixedly mounted on a base outside the left side of the cabin. The output shaft of the hydraulic cylinder is connected to the second push rod through a second pressure sensor. After the second push rod passes through the through hole in the left wall of the cabin, the second push plate fixedly connected to the right end of the second push rod is fixedly connected to the left static ring of the mechanical seal to be tested. The portion of the second push rod inside the cabin is sleeved in a second metal bellows, and the two ends of the second metal bellows are respectively connected to the inner wall of the cabin and the second push plate through a second CF flange.

[0007] The specific structure of the second shaft system is:

[0008] A PDC bearing seat is fixedly installed on the right side of the mechanical seal to be tested, and the PDC bearing to be tested is fixedly installed on the PDC bearing seat. A TC bearing seat is also fixedly installed at a certain distance on the right side of the PDC bearing seat, and the TC bearing to be tested is fixedly installed on the TC bearing seat. A third bearing seat is also fixedly installed at a certain distance on the right side of the TC bearing seat. The third transmission shaft passes through and is cooperatively installed on the bearings of the PDC bearing to be tested, the TC bearing to be tested and the third bearing seat in sequence. The left end of the third transmission shaft is fixedly connected to the right side dynamic ring of the mechanical seal to be tested through a connecting plate;

[0009] The second push plate, connecting plate, PDC bearing seat, TC bearing seat and third bearing seat are all installed in the cabin;

[0010] The third 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 outside the cabin;

[0011] The specific structure of the longitudinal vibration mechanism is:

[0012] The vibration motor is connected to a circular shaft with a cam groove through a gear transmission mechanism. Vibration bearings are installed in the upper and lower limit positions of the cam groove. The vibration bearings are fixedly connected to the impact seat. The bottom of the impact seat is connected to the second sleeve through a connecting bearing. The second sleeve is sleeved on the third transmission shaft. The two end faces of the second sleeve are in contact with the right end face of the PDC bearing to be tested and the left end face of the TC bearing to be tested, respectively, and have a certain preload force.

[0013] The vibration motor seat of the second transverse vibration motor module is mounted on the second sleeve via a bearing, and a second vibration sensor is mounted on the TC bearing seat.

[0014] In a specific implementation, the second lateral vibration motor module adopts existing technical products on the market.

[0015] Furthermore, a spline seat is fixedly installed on the base on the left side of the cabin body. The second push rod passes through the spline seat and then through the through hole on the left side wall of the cabin body and extends into the cabin body. The second push rod and the spline seat are connected by a rectangular spline.

[0016] Since the friction coefficient of the mechanical seal is about 0.1 in the working state, when the dynamic ring and the static ring of the mechanical seal rotate relative to each other and grind against each other, a certain rotational torque will be generated on the second push rod at the left end of the mechanical seal. Therefore, the second push rod part is designed as a rectangular spline structure, and a rectangular spline is used to connect the second push rod and the spline seat to prevent the second push rod from rotating.

[0017] The beneficial effects of the present invention are:

[0018] It can simulate the actual working conditions of ultra-deep wells to the greatest extent possible, displaying the invisible and complex underground environment through the test platform, and complete performance and life tests of key components of drilling equipment, including mechanical seals, PDC bearings, and TC bearings, in a simulated environment. It can discover 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

[0019] Figure 1 A schematic diagram of the three-dimensional appearance of an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the embodiment of the present invention after the hatch is opened;

[0021] Figure 3 This is a top view of the hatch cover after opening the embodiment of the present invention;

[0022] Figure 4 A top view of the second shaft system and related components according to an embodiment of the present invention;

[0023] Figure 5 for Figure 4 Cross-sectional view along BB;

[0024] Figure 6 for Figure 5 A partial enlarged schematic diagram of the mechanical seal, PDC bearing, and TC bearing to be tested;

[0025] Figure 7 This is a cross-sectional view of a longitudinal vibration mechanism according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the spline seat structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] 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.

[0028] Figures 1 to 8 A specific embodiment of the indoor simulation test device for the ultra-deep well high-temperature resistant transmission shaft assembly provided by the present invention is shown, comprising a base 1, a cabin 2, a hatch 3, a hydraulic motor 5, an electric heater 7, a hydraulic cylinder 13, a second shaft system, a longitudinal vibration mechanism 18, and a second transverse vibration motor module 19, wherein:

[0029] The cabin 2 is fixedly mounted on the base 1, the cabin cover 3 is placed on the cabin 2, and the cabin 2 is filled with high-temperature oil; the electric heater 7 is fixedly mounted in the cabin 2 and is located below the oil level of the high-temperature oil; a plurality of temperature sensors 201 are arranged around the cabin 2.

[0030] The hydraulic cylinder 13 is fixedly mounted on the base 1 on the left side of the cabin 2. The output shaft of the hydraulic cylinder 13 is connected to the second push rod 1302 through the second pressure sensor 1301. After the second push rod 1302 passes through the through hole in the left wall of the cabin 2, the second push plate 1303 fixedly connected to the right end of the second push rod 1302 is fixedly connected to the left static ring 1401 of the mechanical seal 14 to be tested. The portion of the second push rod 1302 inside the cabin 2 is sleeved within the second metal bellows 1304. The two ends of the second metal bellows 1304 are respectively connected to the inner wall of the cabin 2 and the second push plate 1303 via a second CF flange 1305.

[0031] The specific structure of the second shaft system is:

[0032] A PDC bearing seat 1501 is fixedly installed on the right side of the mechanical seal 14 to be tested, and the PDC bearing 16 to be tested is fixedly installed on the PDC bearing seat 1501. A TC bearing seat 1502 is also fixedly installed at a certain distance on the right side of the PDC bearing seat 1501. The TC bearing 17 to be tested is fixedly installed on the TC bearing seat 1502. A third bearing seat 1503 is also fixedly installed at a certain distance on the right side of the TC bearing seat 1502. The third transmission shaft 1504 passes through and is fitted on the bearings of the PDC bearing 16 to be tested, the TC bearing 17 to be tested and the third bearing seat 1503 in sequence. The left end of the third transmission shaft 1504 is fixedly connected to the right side dynamic ring 1402 of the mechanical seal 14 to be tested through a connecting plate 1505;

[0033] The third transmission shaft 1504 is connected to the output shaft of the hydraulic motor 5 via a chain and sprocket transmission mechanism. The specific connection method of this embodiment is as follows: the third sprocket 1506 is fixedly mounted on the right end of the third transmission shaft 1504 and connected to an intermediate transmission sprocket via a third chain 1507. The other intermediate transmission sprocket is connected to the sprocket of the output shaft of the hydraulic motor 5 via a second chain 911. The above two intermediate transmission sprockets are coaxially mounted on the same intermediate transmission shaft.

[0034] The hydraulic motor 5 is fixedly mounted on the base 1 outside the cabin 2. In this embodiment, a groove is provided on the side wall of the cabin 2 for the second chain 911 to pass from the outside of the cabin 2 into the inside of the cabin 2, and the lowest point of the groove is higher than the oil level.

[0035] The specific structure of the longitudinal vibration mechanism 18 is as follows:

[0036] The vibration motor 1801 is connected to a circular shaft 1803 with a cam groove 1803a via a gear transmission mechanism 1802. A vibration bearing 1804 is installed in the upper and lower limit positions of the cam groove 1803a. The vibration bearing 1804 is fixedly connected to the impact seat 1805. The bottom of the impact seat 1805 is connected to the second sleeve 1508 via a connecting bearing 1806. The second sleeve 1508 is sleeved on the third transmission shaft 1504. The two end faces of the second sleeve 1508 are respectively in contact with the right end face of the PDC bearing 16 to be tested and the left end face of the TC bearing 17 to be tested, and have a certain preload force.

[0037] The vibration motor seat of the second transverse vibration motor module 19 is mounted on the second sleeve 1508 through a bearing, and the second vibration sensor 1901 is installed on the TC bearing seat 1502.

[0038] In this embodiment, a spline seat 1306 is also fixedly installed on the base 1 on the left side of the cabin body 2. The second push rod 1302 passes through the spline seat 1306 and then passes through the through hole on the left side wall of the cabin body 2 to extend into the cabin body 2. The second push rod 1302 and the spline seat 1306 are connected by a rectangular spline.

[0039] Each tested part including the mechanical seal 14, the PDC bearing 16, and the TC bearing 17 rotates in high-temperature oil under power drive and a corresponding load is applied.

[0040] The method and principle of using the testing device of the present invention to test the transmission shaft assembly parts of the drilling tool including mechanical seals, PDC bearings, and TC bearings are as follows:

[0041] When testing the mechanical seal 14, the hydraulic cylinder 13 transmits the axial load to the static ring 1401 of the mechanical seal 14 through the second push rod 1302 and the second push plate 1303 in turn. The static ring 1401 does not rotate, and the dynamic ring 1402 of the mechanical seal 14 rotates driven by the third transmission shaft 1504. The dynamic ring 1402 and the static ring 1401 grind against each other. The axial load of the mechanical seal 14 can be tested through the above device and the second pressure sensor 1301. The hydraulic cylinder 13 applies a pressure of 10 tons on the mechanical seal 14. The mechanical seal 14 is in a sealed state under this force. At the same time, this pressure will also be transmitted to the PDC bearing 16. As the axial load of the PDC bearing 16, the second shaft system realizes rotational separation at the mechanical seal 14. Since the friction coefficient of the mechanical seal 14 is about 0.1 in the working state, a certain rotational torque will be generated on the second push rod 1302 at the left end of the mechanical seal 14. The second push rod 1302 and the spline seat 1306 are connected by a rectangular spline to prevent the second push rod from rotating.

[0042] When testing the PDC bearing 16 and TC bearing 17, the corresponding bearing seats fix their stationary rings, and the third transmission shaft 1504 drives the dynamic rings. The dynamic and static rings grind against each other, and the radial and axial loads of the PDC bearing 16 and TC bearing 17 can be tested.

[0043] The longitudinal vibration mechanism 18 and the second transverse vibration motor module 19 simulate a vibration environment. The operating principle of the longitudinal vibration mechanism 18 is that the vibration motor 1801 drives a circular shaft 1803 with a cam groove 1803a through a gear transmission mechanism 1802. The axis of the circular shaft 1803 is cam-shaped, and the cam impacts the vibration bearing 1804 structure within the cam groove 1803a. Because the vibration bearing 1804 is restrained vertically and horizontally, it can only move horizontally, that is, left and right. This vibration bearing 1804 generates an alternating left-right impact force with an amplitude of approximately 2-4mm and a maximum frequency of 50Hz. This impact force is then transmitted to the second sleeve 1508 through the impact seat 1805 and the connecting bearing 1806. Because the two end faces of the second sleeve 1508 respectively contact the right end face of the PDC bearing 16 and the left end face of the TC bearing 17 to be tested, and have a certain preload force, the impact force is ultimately transmitted to the PDC bearing 16 and TC bearing 17 to be tested, thereby simulating axial impact. The second transverse vibration motor module 19 can simulate radial impact.

[0044] 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. Those skilled in the art will appreciate that other variations and modifications can be made based on the above description. It is not possible to enumerate all embodiments here. Any obvious variations or modifications arising from the technical solution of the present invention remain within the scope of protection of the present invention.

Claims

1. Indoor simulation test device for ultra-deep well high temperature resistant transmission shaft assembly, characterized by: The invention comprises a base (1), a cabin (2), a hatch (3), a hydraulic motor (5), an electric heater (7), a hydraulic cylinder (13), a second shaft system, a longitudinal vibration mechanism (18), and a second transverse vibration motor module (19), wherein: The cabin (2) is fixedly mounted on the base (1), the cabin cover (3) is placed on the cabin (2), and high-temperature oil is contained in the cabin (2); the electric heater (7) is fixedly mounted in the cabin (2) and is located below the oil level of the high-temperature oil; a plurality of temperature sensors (201) are arranged around the cabin (2); The hydraulic cylinder (13) is fixedly mounted on the base (1) on the left side of the cabin (2). The output shaft of the hydraulic cylinder (13) is connected to the second push rod (1302) through the second pressure sensor (1301). After the second push rod (1302) passes through the through hole on the left side wall of the cabin (2), the second push plate (1303) fixedly connected to the right end of the second push rod (1302) is fixedly connected to the left static ring (1401) of the mechanical seal (14) to be tested; the part of the second push rod (1302) in the cabin (2) is sleeved in the second metal bellows (1304), and the two ends of the second metal bellows (1304) are respectively connected to the inner wall of the cabin (2) and the second push plate (1303) through the second CF flange (1305); The specific structure of the second shaft system is: A PDC bearing seat (1501) is fixedly installed on the right side of the mechanical seal (14) to be tested, and a PDC bearing (16) to be tested is fixedly installed on the PDC bearing seat (1501). A TC bearing seat (1502) is also fixedly installed on the right side of the PDC bearing seat (1501) at a certain distance. A TC bearing (17) to be tested is fixedly installed on the TC bearing seat (1502). A third bearing seat (1503) is also fixedly installed on the right side of the TC bearing seat (1502) at a certain distance. A third transmission shaft (1504) passes through and is fitted on the bearings of the PDC bearing (16) to be tested, the TC bearing (17) to be tested, and the third bearing seat (1503) in sequence. The left end of the third transmission shaft (1504) is fixedly connected to the right side dynamic ring (1402) of the mechanical seal (14) to be tested through a connecting plate (1505). The third transmission shaft (1504) is connected to the output shaft of the hydraulic motor (5) through a chain sprocket transmission mechanism; the hydraulic motor (5) is fixedly mounted on a base (1) outside the cabin (2); The specific structure of the longitudinal vibration mechanism (18) is: The vibration motor (1801) is connected to a circular shaft (1803) with a cam groove (1803a) through a gear transmission mechanism (1802); a vibration bearing (1804) is installed in the upper and lower limit positions of the cam groove (1803a); the vibration bearing (1804) is fixedly connected to the impact seat (1805); the bottom of the impact seat (1805) is connected to the second sleeve (1508) through a connecting bearing (1806); the second sleeve (1508) is sleeved on the third transmission shaft (1504); and the two end faces of the second sleeve (1508) are respectively in contact with the right end face of the PDC bearing (16) to be tested and the left end face of the TC bearing (17) to be tested and have a certain preload force; The vibration motor seat of the second transverse vibration motor module (19) is mounted on the second sleeve (1508) via a bearing sleeve, and a second vibration sensor (1901) is mounted on the TC bearing seat (1502).

2. The indoor simulation test device for ultra-deep well high-temperature resistant transmission shaft assembly according to claim 1 is characterized in that: A spline seat (1306) is also fixedly mounted on the base (1) on the left side of the cabin body (2). The second push rod (1302) passes through the spline seat (1306) and then through the through hole on the left side wall of the cabin body (2) to extend into the cabin body (2). The second push rod (1302) and the spline seat (1306) are connected by a rectangular spline.

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