Indoor real simulation test platform for core barrel of drilling tool for extra-deep well

Abstract

The invention relates to the technical field of drilling machine and tool testing, in particular to an indoor real simulation test platform for a drilling tool core barrel for an extra-deep well, which comprises a base station, a cabin body, a cabin cover, a hydraulic motor, an electric heater, a core barrel mounting assembly and a third transmission shaft, and the specific structure of the core barrel mounting assembly is as follows: a core barrel to be tested is mounted between a third sleeve and a core shaft; two ends of the to-be-tested core barrel are pressed by end covers, the end covers are fixedly connected to two ends of the third sleeve, and the end cover on the left side is fixedly connected with the right end of the third transmission shaft through a coupler; and the right end of the mandrel is fixedly connected with the fixed tailstock. The third transmission shaft drives the to-be-tested core barrel to rotate, the core barrel rotates and rubs on the surface of the mandrel, and the wear resistance of the inner wall of the core barrel can be tested. The performance test and the service life test of the core barrel of the drilling machine can be completed in a 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 platform for core tubes of drilling tools used in ultra-deep wells. Background Art

[0002] The actual working environment of ultra-deep wells is thousands or even tens of thousands of meters underground. If the drill core barrel is tested directly underground, it will make it difficult to collect test data. There are many unknown factors underground and the risks are high. Repeated testing will also significantly increase R&D costs. Therefore, it is urgent to develop an indoor simulated testing method and platform for ultra-deep well drill core barrels to replace the testing in the actual working environment. Summary of the Invention

[0003] Based on the above problems, the purpose of the present invention is to provide an indoor simulated testing method and platform for core barrels of drill tools for ultra-deep wells, which can simulate the actual working conditions of ultra-deep wells to the greatest extent, display the invisible and complex underground environment through the test bench, and complete the performance test and life test of the core barrel of the drill tool in a simulated environment.

[0004] The technical solution adopted by the present invention to achieve its invention object is: an indoor simulated testing platform for core barrels of ultra-deep well drilling tools, including a base, a cabin, a hatch, a hydraulic motor, an electric heater, a core barrel mounting assembly, and a third transmission shaft, 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;

[0006] The specific structure of the core tube installation assembly is:

[0007] The core tube to be tested is installed between the third sleeve and the core shaft. The two ends of the core tube to be tested are pressed by end caps, and the end caps are fixedly connected to the two ends of the third sleeve. The left end cap is also fixedly connected to the right end of the third transmission shaft through a coupling. The right end of the core shaft is fixedly connected to the fixed tailstock, and the left end of the core shaft is connected to the coupling through a support bearing. The core shaft, coupling, fixed tailstock, and third sleeve are all installed in the cabin.

[0008] The third transmission shaft is installed in the cabin through a bearing seat and is connected to the output shaft of the hydraulic motor through a chain sprocket transmission mechanism;

[0009] The hydraulic motor is fixedly mounted on a base outside the cabin.

[0010] The beneficial effects of the present invention are:

[0011] It can simulate the actual working conditions of ultra-deep wells to the greatest extent possible, display the invisible and complex underground environment through the test platform, and complete the performance test and life test of the core barrel of the drill tool for ultra-deep wells 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

[0012] Figure 1 A schematic diagram of the three-dimensional appearance of an embodiment of the present invention;

[0013] Figure 2 This is a top view of the hatch cover after opening the embodiment of the present invention;

[0014] Figure 3 A top view of a core barrel installation assembly and related components according to an embodiment of the present invention;

[0015] Figure 4 for Figure 3 Cross-sectional view along BB;

[0016] Figure 5 for Figure 4 Enlarged schematic diagram of part A. DETAILED DESCRIPTION

[0017] 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.

[0018] Figures 1 to 5 A specific embodiment of the indoor simulated testing platform for core barrels of ultra-deep well drilling tools 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 core barrel mounting assembly, and a third transmission shaft 1504, wherein:

[0019] The cabin 2 is fixedly mounted on the base 1, the hatch 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;

[0020] The specific structure of the core tube installation assembly is:

[0021] The core tube 20 to be tested is installed between the third sleeve 1512 and the core shaft 1509. The two ends of the core tube 20 to be tested are pressed tightly with end caps 1513, and the end caps 1513 are fixedly connected to the two ends of the third sleeve 1512 with screws. The left end cap 1513 is also fixedly connected to the right end of the third transmission shaft 1504 through a coupling 1510. Specifically, Figure 5As shown, in this embodiment, the left half of the end cover 1513 on the left is a cylindrical body with a through hole, and the cylindrical part is fixedly installed in the shaft hole at the right end of the coupling 1510. The third transmission shaft 1504 has a cylindrical hollow groove at its right end, and the right end of the third transmission shaft 1504 is fixedly installed in the shaft hole at the left end of the coupling 1510; the right end of the core shaft 1509 is fixedly connected to the fixed tailstock 1511 by screws, and the left end of the core shaft 1509 is connected to the coupling 1510 through the support bearing 1514 The specific connection method is as follows: the support bearing 1514 is fixedly installed in the hollow groove at the right end of the third transmission shaft 1504, and the left end of the core shaft 1509 passes through the through hole of the left end cover 1513 and the shaft hole of the coupling from right to left, and is then installed in the inner ring of the support bearing 1514. The support bearing 1514 supports the left end of the core shaft 1509; the core shaft 1509, the coupling 1510, the fixed tailstock 1511, and the third sleeve 1512 are all installed in the cabin 2;

[0022] The third transmission shaft 1504 is installed in the cabin 2 through the bearing seat 1503 and is connected to the output shaft of the hydraulic motor 5 through a chain and sprocket transmission mechanism. The specific connection method of this embodiment is as follows: the third sprocket 1506 is fixedly sleeved on the third transmission shaft 1504 at a position between the bearing seat 1503 and the coupling 1510, and is connected to an intermediate transmission sprocket through a third chain 1507. The other intermediate transmission sprocket is connected to the sprocket of the output shaft of the hydraulic motor 5 through a second chain 911. The above two intermediate transmission sprockets are coaxially mounted on an intermediate transmission shaft, and the intermediate transmission shaft is mounted on another bearing seat in the cabin 2;

[0023] 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.

[0024] The core barrel 20 to be tested is driven by power and rotates in high-temperature oil.

[0025] The method for testing the core barrel of a deep well drilling tool using the testing device of the present invention is as follows:

[0026] The core shaft 1509 remains stationary, and the third transmission shaft 1504, driven by the hydraulic motor 5, drives the core barrel 20 to be tested to rotate through the coupling 1510, the end cover 1513, and the third sleeve 1512 in sequence. The core barrel 20 rotates and rubs on the surface of the core shaft 1509, which can test the wear resistance of the inner wall of the core barrel 20.

[0027] 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 virtual testing platform for core tubes of ultra-deep well drilling tools, characterized by: The invention comprises a base (1), a cabin (2), a hatch (3), a hydraulic motor (5), an electric heater (7), a core tube mounting assembly, and a third transmission shaft (1504), wherein: 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; The specific structure of the core tube installation assembly is: The core tube (20) to be tested is installed between the third sleeve (1512) and the core shaft (1509), and the two ends of the core tube (20) to be tested are pressed by end covers (1513), and the end covers (1513) are fixedly connected to the two ends of the third sleeve (1512), and the left end cover (1513) is also fixedly connected to the right end of the third transmission shaft (1504) through a coupling (1510); the right end of the core shaft (1509) is fixedly connected to the fixed tailstock (1511), and the left end of the core shaft (1509) is connected to the coupling (1510) through a support bearing (1514); the core shaft (1509), the coupling (1510), the fixed tailstock (1511), and the third sleeve (1512) are all installed in the cabin (2); The third transmission shaft (1504) is installed in the cabin (2) via a bearing seat and is connected to the output shaft of the hydraulic motor (5) via a chain sprocket transmission mechanism; The hydraulic motor (5) is fixedly mounted on a base (1) outside the cabin (2).

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