Million-meter deep well drilling tool metal screw testing system

Abstract

A metal screw testing system for a myriameter deep well drilling tool relates to the technical field of extra-deep well drilling tool testing and mainly structurally comprises a base station, a hydraulic cylinder, an infrared thermal camera, a mud tank, a mud pump, a radiator, a motor, a torque sensor, a vibration sensor and a first shaft system. The hydraulic cylinder provides an axial load, the motor serves as a power source to transmit power to the drilling tool metal screw through the gear transmission mechanism, and the performance test and the service life test of the myriameter deep well drilling tool metal screw are completed in a simulated environment.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-deep well drilling tool testing, and in particular to a 10,000-meter deep well drilling tool metal screw testing system and method. Background Art

[0002] The actual working environment of ultra-deep wells is thousands of meters 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 the R&D cost. Therefore, it is urgent to develop a test platform for metal screws of drill tools to replace the test in the actual working environment, and to display the invisible and complex environment underground through the test platform. The performance test and life test of the metal screw components of the drill tool are completed in a simulated environment, and the environmental parameters and test parameters can be monitored. The defects and deficiencies of the tested parts can be discovered in advance, and test data can be provided for the design of the tested parts, thereby improving the structure and reducing R&D costs.

[0003] How it works

[0004] Metal screws in deep well drilling are used to transmit torque, support the drill bit and maintain the stability of drilling tools. Their main working principles include:

[0005] 1. Transmitting torque: During the drilling process, the drilling equipment provides torque by rotating to enable the drill bit to drill into the underground rock formation. In this process, the metal screw, as a key component for transmitting torque, transmits the torque from the drilling rig above to the drill bit at the bottom, ensuring that the drill bit can drill smoothly.

[0006] 2. Support and connection: Metal screws are not only responsible for the transmission of torque, but also for support and connection. They mechanically connect the various components of the drilling rig (such as the drill bit, weight, stabilizer, etc.) and maintain the overall stability of the drilling tool. Especially in the extreme environment of a 10,000-meter deep well, the connection performance and strength of the screw are crucial.

[0007] 3. Compression, tension and bending resistance: In deep wells, the screw not only needs to withstand the torque generated by drilling, but also the challenges of high pressure and high temperature environment underground. Metal screws need to have high compression, tension, bending and other properties to ensure that the drilling tools can work stably underground for a long time.

[0008] 4. Thermal expansion and stress changes: In deep wells, the temperature and pressure change with the increase of depth, which will cause thermal expansion or stress changes in the screw during operation. Therefore, the material and design of the screw need to be able to withstand these extreme physical changes to avoid breakage or damage due to temperature changes or pressure fluctuations.

[0009] Therefore, the core goal of the 10,000-meter deep-well drilling tool metal screw testing system is to ensure the reliability and stability of the screw in extreme deep-well environments. It simulates the temperature, pressure and mechanical load downhole, monitors the working status of the screw under different conditions, and evaluates its strength, performance and life reliability. This test system is of great significance for improving drilling efficiency and reducing the risk of downhole failures. Summary of the invention

[0010] Based on the above problems, the purpose of the present invention is to provide a metal screw testing system for 10,000-meter deep well drilling tools, 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 metal screw of the drilling tool in a simulated environment.

[0011] The technical solution adopted by the present invention to achieve its invention purpose is: a 10,000-meter deep well drilling tool metal screw testing system, including a base, a hydraulic cylinder, a motor, an infrared thermal camera, a mud tank, a mud pump, a radiator, a motor, a vibration sensor, a torque sensor, and a first axis system, wherein:

[0012] The first axis is fixedly mounted on the base, and the specific structure of the drilling tool metal screw and the mounting assembly is as follows:

[0013] The metal screw of the drill tool to be tested is divided into left and right screws, which are connected to the center through thrust bearings and thrust joints and fixed in the first axis system. The hydraulic cylinder provides power to the metal drill tool thrust seat, so that it can press the entire axis system through movement on the slide rail. A magnetic induction heating coil is installed in the middle to simulate the temperature conditions in the ultra-deep well virtual environment to test its thermal performance. A set of bevel gears are installed on the left and right screws respectively, and the power is provided by the motor connected to them, and the torque is transmitted from the bevel gears to the entire first axis system.

[0014] A torque sensor and a vibration sensor are installed in the first shaft system to collect torque and vibration data of the metal screw being tested.

[0015] A mud pump is installed outside the first shaft system to transport the mud generated during the drilling process to the mud tank on the other side for storage. At the same time, a radiator is installed on the pipeline to improve the heat dissipation efficiency during transportation.

[0016] The hydraulic cylinder is fixedly mounted on a base outside the shaft system.

[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, display the invisible and complex underground environment through the test platform, and collect metal screw related data through sensors in a virtual environment for processing, complete the performance test and life test of the metal screw in the drilling rig, and 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.

[0019] Data processing

[0020] In the simulation of 10,000-meter deep well drilling operations, in order to accurately evaluate the mechanical properties and vibration characteristics of the metal screw during operation, the present invention uses a torque sensor and a vibration sensor to monitor the metal screw in real time to obtain important data such as the screw's torque and vibration. These data need to be processed after collection to extract meaningful information to help determine the working status and fatigue level of the screw. The specific processing method uses the least squares method to accurately analyze and fit the data.

[0021] The least squares method is a mathematical optimization method for data fitting. Its main purpose is to find the best fitting model by minimizing the sum of squares of the errors between the predicted values ​​and the actual observed values.

[0022] For a given data point (x i ,y i ), the least squares method fits the model by minimizing the following objective function:

[0023]

[0024] in:

[0025] y i is the actual observed value, f(x i ) is the value predicted by the model, S is the sum of squares of errors, and n is the number of data points.

[0026] The specific processing method is: to fit the data by establishing a linear regression model with given data, calculate the error between the model prediction value and the actual observation value, and add the sum of squares of these errors. By adjusting the model parameters and minimizing the sum of squares of the errors, the best fitting model is obtained.

[0027] This method is used to smooth the torque signal, thereby removing the noise in the signal and accurately capturing the changing trend of the screw torque. For the low-frequency or highly fitting parts of the vibration signal, the irregular fluctuations caused by external interference or signal noise can be removed. This helps to accurately extract the basic trend of the vibration signal and effectively identify the working status of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional appearance schematic diagram of the first axis system and the base according to an embodiment of the present invention;

[0029] Figure 2 A top view of the first axis system and the base according to an embodiment of the present invention; DETAILED DESCRIPTION

[0030] 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.

[0031] Figures 1-2 A specific embodiment of the drilling tool metal screw testing system provided by the present invention is shown, including a base, a hydraulic cylinder, a motor, a magnetic induction heating coil, a mud pump, a mud tank, a radiator, a pressure gauge, a flow meter, and a first shaft system, wherein:

[0032] The specific structure of the first shaft system is as follows: the metal screw thrust seat (3) is slidably mounted on the slide rail (5) on the surface of the base (1), the metal screw thrust seat (3) fixes the screw (205) in the first shaft system through the thrust bearing and the thrust joint (213), the bottom of the metal screw thrust seat (3) is connected to the hydraulic cylinder (4), and the hydraulic cylinder (4) provides axial power for the reciprocating motion of the metal screw thrust seat (3) on the slide rail (5). The right side of the metal screw thrust seat (3) is the right turntable part of the shaft system, the turntable is composed of a pair of 90° meshing bevel gears (208) (207), the large bevel gear (208) is fixed on the right screw (204), the small bevel gear (207) is connected to the motor (61), and a torque sensor is installed at the connection point. The motor (61) rotates to transmit power to the first shaft system through the bevel gear, so that the right screw (204) produces circumferential rotation. The right end of the right screw is connected to the right support frame (211) fixed to the surface of the base through a rotating joint (210). A magnetic induction heating coil (206) is installed in the middle, and the left side is connected to the left screw (212). The left screw is equipped with a left turntable (204) (203) part which is also powered by the motor (62), and the left end is connected to the left support frame (202) through a rotating joint (201).

[0033] The heat sink (7) contains two types of heat sinks, namely narrow heat sinks (71) and wide heat sinks (72).

[0034] The hydraulic cylinder (4) is fixedly mounted on the surface of the base platform (1) beside the first shaft system.

[0035] The vibration sensor is installed on the metal screw of the drilling tool, and the torque sensor is installed on the transmission shaft between the motor (61) and the small bevel gear (61).

[0036] The metal screw to be measured rotates in the first axis system under power drive.

[0037] The method and principle of using the testing device of the present invention to test the metal screw of a drilling tool are as follows:

[0038] The metal screw remains stationary, and the motor drives the metal screw to be tested to rotate through the transmission shaft, large bevel gear, and small bevel gear in sequence, simulating the working state of an ultra-deep well, and can complete the performance test and life test of the metal screw to be tested.

[0039] 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 10,000-meter deep well drilling tool metal screw testing system, characterized in that: It comprises a base (1), a hydraulic cylinder (4), a motor (6), a magnetic induction heating coil (206), a radiator (7), a first shaft system (2), a torque sensor, a vibration sensor, a pressure gauge, a flow meter, a mud pump, and a mud tank, wherein: The first shaft system (2) is fixedly mounted on the base (1), and the magnetic induction heating coil (206) is fixedly mounted on the first shaft system (2); an infrared thermal camera is installed in the base (1); The specific structure of the first shaft system is as follows: the metal screw thrust seat (3) is slidably mounted on the slide rail (5) on the surface of the base (1), the metal screw thrust seat (3) fixes the screw (205) in the first shaft system through the thrust bearing and the thrust joint (213), the bottom of the metal screw thrust seat (3) is connected to the hydraulic cylinder (4), and the hydraulic cylinder (4) provides axial power for the reciprocating motion of the metal screw thrust seat (3) on the slide rail (5). The right side of the metal screw thrust seat (3) is the right turntable part of the shaft system, the turntable is composed of a pair of 90° meshing bevel gears (208) (207), the large bevel gear (208) is fixed on the right screw (204), the small bevel gear (207) is connected to the motor (61), and a torque sensor is installed at the connection point. The motor (61) transmits power to the first shaft system by rotating the bevel gear, so that the right screw (205) produces circumferential rotation. The right end of the right screw is connected to the right support frame (211) fixed to the surface of the base through a rotating joint (210). A magnetic induction heating coil (206) is installed in the middle, and the left side is connected to the left screw (212). The left screw is equipped with a left turntable (204) (203) part which is also powered by the motor (62), and the left end is connected to the left support frame (202) through a rotating joint (201).

2. The 10,000-meter deep well drilling tool metal screw testing system according to claim 1 is characterized in that: The vibration sensor is mounted on the metal screw of the drilling tool, and the torque sensor is mounted on the transmission shaft between the motor (61) and the small bevel gear (61); the hydraulic cylinder (4) is fixedly mounted on the surface of the base (1) next to the first shaft system; the radiator (7) contains two types of radiating fins, namely narrow radiating fins (71) and wide radiating fins (72).

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