An apparatus and method for testing output performance of a drilling-while-gas-turbine-generator

Abstract

The application provides a device and method for testing output performance of a gas-driven turbine generator while drilling. The device for testing output performance of a gas-driven turbine generator while drilling comprises a gas compressor for obtaining gas, a gas booster for pressurizing the gas, an electric heating belt for adjusting the temperature of the gas, a test air duct, a gas-driven turbine generator, a load resistor for applying variable load to the gas-driven turbine generator, and a control ball valve for adjusting the pressure of the gas in the test air duct. The gas compressor is connected with the gas booster, the gas booster is connected with one end of the test air duct, the electric heating belt is sleeved on the outer wall of one end of the test air duct, the gas-driven turbine generator is installed in the middle of the test air duct, one end of the load resistor is connected with the output end of the gas-driven turbine generator, and the control ball valve is installed at the other end of the test air duct.

Description

Technical Field

[0001] This invention relates to the field of drilling gas-driven turbine generator technology, and in particular to an apparatus and method for testing the output performance of a drilling gas-driven turbine generator. Background Technology

[0002] In the field of oil and gas drilling, gas drilling technology can significantly improve drilling speed, effectively protect gas reservoirs, and enhance recovery rates and gas production. In recent years, electromagnetic wave and microwave measurement-while-drilling (MWD) transmission technologies have matured, making it possible to conduct directional drilling operations in gas drilling. However, the physical characteristics of these two MWD technologies limit their transmission depth. To increase the data transmission depth, the most direct method is to increase the transmission power of the electromagnetic wave and microwave signal sources. This depends on the output power of the system power supply. Compared to traditional battery power, gas-driven turbine generators have higher output power, which can meet the high power requirements of electromagnetic wave and microwave transmission. However, as the well depth increases, the static pressure and temperature of the gas at the bottom of the well will continuously rise. According to the ideal gas law, the volume and density of a gas change when its pressure and temperature change. The change in volume will change the gas velocity flowing through the turbine, and the change in density will change the turbine's output torque. In addition, considering that the injected gas volume in gas drilling will be adjusted according to on-site requirements, the change in gas volume will also change the gas velocity flowing through the turbine. Therefore, the output voltage of the gas-driven turbine generator will change with the increase in well depth or the change in gas volume. The range of output voltage variation cannot be too wide, otherwise it will affect the normal operation of the measurement while drilling system. The existing technology cannot determine whether the output voltage of the gas-driven turbine generator is within the allowable voltage range. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an apparatus and method for testing the output performance of a drilling gas-driven turbine generator, which addresses the shortcomings of the prior art.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A device for testing the output performance of a gas-driven turbine generator while drilling, comprising: a gas compressor for acquiring gas, a gas booster for pressurizing the gas, an electric heating belt for adjusting the gas temperature, a test duct, a gas-driven turbine generator, a load resistor for applying variable load to the gas-driven turbine generator, and a control ball valve for adjusting the gas pressure in the test duct. The gas compressor is connected to the gas booster, the gas booster is connected to one end of the test duct, the electric heating belt is sleeved on the outer wall of one end of the test duct, the gas-driven turbine generator is installed in the middle of the test duct, one end of the load resistor is connected to the output end of the gas-driven turbine generator, and the control ball valve is installed at the other end of the test duct.

[0005] The beneficial effects of adopting the technical solution of this invention are as follows: By using a ground testing device to adjust the pressure, temperature, and volume of the incoming gas, the actual working conditions of gas drilling at different well depths and with different gas volumes are simulated. Once the gas pressure and temperature are adjusted to be consistent with the working conditions at the bottom of the gas drilling well, the output performance of the gas-driven turbine generator is tested. By connecting various load resistors of different specifications to the output terminal of the gas-driven turbine generator, the voltage of the three-phase AC power output by the gas-driven turbine generator under different load conditions is measured. The output voltage is a power parameter for judging whether the gas drilling downhole measurement-while-drilling system can work normally. In addition, the output voltage combined with the load resistor can determine the output power of the gas-driven turbine generator, which is also a basic parameter of the output performance of the gas-driven turbine generator. The output power can be used to calculate the turbine speed of the gas-driven turbine generator. The turbine speed is related to the output voltage of the gas-driven turbine generator. The design speed of the gas-driven turbine generator is judged by the voltage value output under load. This facilitates testing whether the output voltage of the gas-driven turbine generator is within the allowable voltage range, and allows for the detection of the gas-driven turbine generator's load output under different pressures, temperatures, and gas volumes. This ensures that the output voltage of the gas-driven turbine generator meets both the high-power transmission requirements of the electromagnetic wave and microwave signal sources of the gas drilling downhole measurement-while-drilling system and the reliable operation of various power modules in the system.

[0006] Furthermore, the load resistor is located outside the test duct, and the other end of the load resistor is provided with an output test point for measuring the on-load output voltage of the air-driven turbine generator.

[0007] The advantages of adopting the above-mentioned further technical solution are: the load resistor is located outside the test duct, which facilitates the replacement of the load resistor and the realization of different load conditions. The setting of the output test point facilitates the measurement of the voltage and frequency of the three-phase AC power output by the air-driven turbine generator under different load conditions.

[0008] Furthermore, there are multiple gas compressors, and each of the multiple gas compressors is connected to the gas booster.

[0009] The beneficial effects of adopting the above-mentioned further technical solution are: multiple gas compressors are used in combination to meet the standard gas volume required for gas drilling, and the gas booster integrates and pressurizes the gas produced by multiple gas compressors and delivers it to the test air duct.

[0010] Furthermore, the test duct is connected to a flow meter for measuring gas flow rate, an inlet pressure gauge for measuring inlet pressure, a thermometer for measuring gas temperature, and an outlet pressure gauge, with the gas-driven turbine generator located between the inlet pressure gauge and the outlet pressure gauge.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Inlet and outlet pressure gauges are installed at the front and rear ends of the gas-driven turbine generator in the test duct to verify the pressure loss data of the gas-driven turbine generator. This pressure loss data is used to determine how much of the pressure loss supplied to the drill bit is occupied by the gas-driven turbine generator, because only when the pressure loss supplied to the drill bit is sufficient can the normal operation of gas drilling be guaranteed. Setting a flow velocity measurement at the front end of the gas-driven turbine generator aims to accurately grasp the gas flow velocity through the turbine. Combined with the pressure monitoring value of the nearby front end, this provides basic data support for the turbine's shape design. The gas flow velocity required for the gas-driven turbine design can be measured by the flow meter at the turbine's front end. Combined with the pressure value of the inlet pressure gauge of the nearby turbine, the data required for turbine design calculations can be provided. During testing, if the output voltage under load does not meet the requirements, the turbine can be redesigned.

[0012] Furthermore, the flow meter, the inlet pressure gauge, the thermometer, and the outlet pressure gauge are all located on the outside of the test air duct.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates intuitive observation of the gas flow rate, pressure, and temperature at the corresponding location.

[0014] Furthermore, the test duct is made of metal.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are: wrapping an electric heating strip around the outer surface of the air inlet end of the test air duct, and processing the test air duct into a metal cylinder with good thermal conductivity, can quickly transfer the heat generated by the electric heating strip to the gas inside the test air duct to raise its temperature, and adjust the temperature of the electric heating strip so that the temperature displayed by the thermometer is consistent with the bottom temperature of the gas drilling well.

[0016] Furthermore, the gas compressor is connected to the gas booster via a pipeline, and the gas booster is connected to one end of the test air duct via a pipeline.

[0017] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the connection of the gas compressor, the gas booster and the test air duct.

[0018] Furthermore, the inner diameter of the test duct is adapted to the inner diameter of the drill string.

[0019] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the simulation of the actual working environment of air-driven turbine generators and improves accuracy.

[0020] Furthermore, the present invention also provides a method for testing the output performance of a drilling gas-driven turbine generator, based on the apparatus for testing the output performance of a drilling gas-driven turbine generator as described in any one of the above claims, the method for testing the output performance of a drilling gas-driven turbine generator includes:

[0021] S1. The gas injection volume, pressure and temperature are adjusted one by one by the gas compressor, gas booster and electric heating belt to simulate the actual working conditions at the bottom of the well when the gas drilling is at different depths and gas volumes.

[0022] S2. Connect one end of different load resistors to the output terminal of the air-driven turbine generator in sequence, and measure the voltage value of the three-phase AC power output by the air-driven turbine generator under different load conditions at the other end of the load resistor.

[0023] S3. Based on the voltage values, analyze the load-bearing output performance of the air-driven turbine generator under different operating conditions.

[0024] The beneficial effects of adopting the technical solution of this invention are as follows: By using a ground testing device to adjust the pressure, temperature, and volume of the incoming gas, the actual working conditions of gas drilling at different well depths and with different gas volumes are simulated. Once the gas pressure and temperature are adjusted to be consistent with the working conditions at the bottom of the gas drilling well, the output performance of the gas-driven turbine generator is tested. By connecting various load resistors of different specifications to the output terminal of the gas-driven turbine generator, the voltage of the three-phase AC power output by the gas-driven turbine generator under different load conditions is measured. The output voltage is a power parameter for judging whether the gas drilling downhole measurement-while-drilling system can work normally. In addition, the output voltage combined with the load resistor can determine the output power of the gas-driven turbine generator, which is also a basic parameter of the output performance of the gas-driven turbine generator. The output power can be used to calculate the turbine speed of the gas-driven turbine generator. The turbine speed is related to the output voltage of the gas-driven turbine generator. The design speed of the gas-driven turbine generator is judged by the voltage value output under load. This facilitates testing whether the output voltage of the gas-driven turbine generator is within the allowable voltage range, and allows for the detection of the gas-driven turbine generator's load output under different pressures, temperatures, and gas volumes. This ensures that the output voltage of the gas-driven turbine generator meets both the high-power transmission requirements of the electromagnetic wave and microwave signal sources of the gas drilling downhole measurement-while-drilling system and the reliable operation of various power modules in the system.

[0025] Furthermore, step S3 is followed by:

[0026] S4. Measure the gas flow rate, inlet pressure, and outlet pressure one by one using a flow meter, inlet pressure gauge, and outlet pressure gauge.

[0027] S5. Calculate the pressure difference based on the intake pressure and the outlet pressure to provide data support for the design of the turbine shape.

[0028] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Inlet and outlet pressure gauges are installed at the front and rear ends of the gas-driven turbine generator in the test duct to verify the pressure loss data of the gas-driven turbine generator. This pressure loss data is used to determine how much of the pressure loss supplied to the drill bit is occupied by the gas-driven turbine generator, because only when the pressure loss supplied to the drill bit is sufficient can the normal operation of gas drilling be guaranteed. Setting a flow velocity measurement at the front end of the gas-driven turbine generator aims to accurately grasp the gas flow velocity through the turbine. Combined with the pressure monitoring value of the nearby front end, this provides basic data support for the turbine's shape design. The gas flow velocity required for the gas-driven turbine design can be measured by the flow meter at the turbine's front end. Combined with the pressure value of the inlet pressure gauge of the nearby turbine, the data required for turbine design calculations can be provided. During testing, if the output voltage under load does not meet the requirements, the turbine can be redesigned.

[0029] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the device for testing the output performance of a drilling gas-driven turbine generator provided in an embodiment of the present invention.

[0031] Figure 2 This is one of the schematic flowcharts of a method for testing the output performance of a gas-driven turbine generator while drilling, provided in an embodiment of the present invention.

[0032] Figure 3 This is the second schematic flowchart of a method for testing the output performance of a gas-driven turbine generator while drilling, provided in an embodiment of the present invention.

[0033] The following are the symbols and their meanings: 1. Gas compressor; 2. High-pressure pipeline; 3. Gas booster; 4. Electric heating belt; 5. Flow meter; 6. Inlet pressure gauge; 7. Thermometer; 8. Test air duct; 9. Gas-driven turbine generator; 10. Load resistor; 11. Output test point; 12. Outlet pressure gauge; 13. Control ball valve. Detailed Implementation

[0034] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] like Figure 1As shown, this embodiment of the invention provides an apparatus for testing the output performance of a gas-driven turbine generator during drilling, comprising: a gas compressor 1 for acquiring gas, a gas booster 3 for pressurizing the gas, an electric heating belt 4 for adjusting the gas temperature, a test duct 8, a gas-driven turbine generator 9, a load resistor 10 for applying variable load to the gas-driven turbine generator 9, and a control ball valve 13 for adjusting the gas pressure in the test duct 8. The gas compressor 1 is connected to the gas booster 3, and the gas booster 3 is connected to one end of the test duct 8. The electric heating belt 4 is sleeved on the outer wall of one end of the test duct 8. The gas-driven turbine generator 9 is installed in the middle of the test duct 8. One end of the load resistor 10 is connected to the output end of the gas-driven turbine generator 9. The control ball valve 13 is installed at the other end of the test duct 8.

[0036] The beneficial effects of adopting the technical solution of this invention are as follows: By using a ground testing device to adjust the pressure, temperature, and volume of the incoming gas, the actual working conditions of gas drilling at different well depths and with different gas volumes are simulated. Once the gas pressure and temperature are adjusted to be consistent with the working conditions at the bottom of the gas drilling well, the output performance of the gas-driven turbine generator is tested. By connecting various load resistors of different specifications to the output terminal of the gas-driven turbine generator, the voltage of the three-phase AC power output by the gas-driven turbine generator under different load conditions is measured. The output voltage is a power parameter for judging whether the gas drilling downhole measurement-while-drilling system can work normally. In addition, the output voltage combined with the load resistor can determine the output power of the gas-driven turbine generator, which is also a basic parameter of the output performance of the gas-driven turbine generator. The output power can be used to calculate the turbine speed of the gas-driven turbine generator. The turbine speed is related to the output voltage of the gas-driven turbine generator. The design speed of the gas-driven turbine generator is judged by the voltage value output under load. This facilitates testing whether the output voltage of the gas-driven turbine generator is within the allowable voltage range, and allows for the detection of the gas-driven turbine generator's load output under different pressures, temperatures, and gas volumes. This ensures that the output voltage of the gas-driven turbine generator meets both the high-power transmission requirements of the electromagnetic wave and microwave signal sources of the gas drilling downhole measurement-while-drilling system and the reliable operation of various power modules in the system.

[0037] At the tail end of the test air duct, the pressure of the gas in the test air duct 8 is adjusted by controlling the ball valve 13 to be equivalent to the bottom pressure of the gas drilling well.

[0038] Figure 1 The arrows in the diagram represent the direction and trajectory of gas flow.

[0039] like Figure 1 As shown, the load resistor 10 is located outside the test duct 8, and the other end of the load resistor 10 is provided with an output test point 11 for measuring the output voltage of the air-driven turbine generator 9 under load.

[0040] The advantages of adopting the above-mentioned further technical solution are: the load resistor is located outside the test duct, which facilitates the replacement of the load resistor and the realization of different load conditions. The setting of the output test point facilitates the measurement of the voltage and frequency of the three-phase AC power output by the air-driven turbine generator under different load conditions.

[0041] like Figure 1 As shown, further, there are multiple gas compressors 1, and each of the multiple gas compressors 1 is connected to the gas booster 3.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are: multiple gas compressors are used in combination to meet the standard gas volume required for gas drilling, and the gas booster integrates and pressurizes the gas produced by multiple gas compressors and delivers it to the test air duct.

[0043] like Figure 1 As shown, the test duct 8 is further connected to a flow meter 5 for measuring gas flow rate, an inlet pressure gauge 6 for measuring inlet pressure, a thermometer 7 for measuring gas temperature, and an outlet pressure gauge 12. The air-driven turbine generator 9 is located between the inlet pressure gauge 6 and the outlet pressure gauge 12.

[0044] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Inlet and outlet pressure gauges are installed at the front and rear ends of the gas-driven turbine generator in the test duct to verify the pressure loss data of the gas-driven turbine generator. This pressure loss data is used to determine how much of the pressure loss supplied to the drill bit is occupied by the gas-driven turbine generator, because only when the pressure loss supplied to the drill bit is sufficient can the normal operation of gas drilling be guaranteed. Setting a flow velocity measurement at the front end of the gas-driven turbine generator aims to accurately grasp the gas flow velocity through the turbine. Combined with the pressure monitoring value of the nearby front end, this provides basic data support for the turbine's shape design. The gas flow velocity required for the gas-driven turbine design can be measured by the flow meter at the turbine's front end. Combined with the pressure value of the inlet pressure gauge of the nearby turbine, the data required for turbine design calculations can be provided. During testing, if the output voltage under load does not meet the requirements, the turbine can be redesigned.

[0045] Furthermore, the test duct 8 is made of metal.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are: wrapping an electric heating strip around the outer surface of the air inlet end of the test air duct, and processing the test air duct into a metal cylinder with good thermal conductivity, can quickly transfer the heat generated by the electric heating strip to the gas inside the test air duct to raise its temperature, and adjust the temperature of the electric heating strip so that the temperature displayed by the thermometer is consistent with the bottom temperature of the gas drilling well.

[0047] like Figure 1As shown, the gas compressor 3 is further connected to the gas booster 1 via a pipeline, and the gas booster 1 is connected to one end of the test air duct 8 via a pipeline.

[0048] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates the connection of the gas compressor, the gas booster and the test air duct.

[0049] like Figure 1 As shown, the flow meter 5, the inlet pressure gauge 6, the thermometer 7, and the outlet pressure gauge 12 are all located outside the test duct 8.

[0050] The beneficial effect of adopting the above-mentioned further technical solution is that it facilitates intuitive observation of the gas flow rate, pressure, and temperature at the corresponding location.

[0051] Furthermore, the inner diameter of the test duct 8 is adapted to the inner diameter of the drill string.

[0052] The beneficial effects of adopting the above-mentioned further technical solutions are: it facilitates the simulation of the actual working environment of air-driven turbine generators and improves accuracy.

[0053] A gas-driven turbine generator 9 is fixedly installed in the test duct 8. The inner diameter of the test duct 8 is consistent with the inner diameter of the drill string where the gas-driven turbine generator 9 is actually working. The air inlet end of the test duct 8 is wrapped with an electric heating belt 4 to simulate the bottom hole temperature.

[0054] A device for testing the output performance of a gas-driven turbine generator while drilling (WDD) simulates the actual working conditions of the WDD gas-driven turbine generator at different well depths and gas volumes, and tests the load-carrying output capacity of the WDD gas-driven turbine generator. It is an essential testing device for developing WDD gas-driven turbine generators.

[0055] Figure 3 This paper illustrates the principle of a method for testing the output performance of a gas-driven turbine generator during drilling. The process includes: 1. Gas pressurization at ambient temperature and pressure; 2. Temperature regulation; 3. Flow rate measurement; 4. Front-end pressure monitoring; 5. Turbine generator; 6. Back-end pressure monitoring; 7. System pressure control; and gas outflow. Output testing is performed at the turbine generator; the pressure difference ΔP is obtained based on the front-end and back-end pressure monitoring data.

[0056] Specifically, to simulate the actual pressure and temperature conditions downhole in gas drilling, the atmospheric gas needs to be pressurized first. After temperature adjustment, the pressurized gas has pressure and temperature comparable to the actual downhole conditions. At this point, the gas acts as a gas source to impact the turbine of the gas turbine generator. After the turbine rotates under force, the generator (gas-driven turbine generator) starts and operates. Different load resistors are connected sequentially to the output test terminal of the gas turbine generator (gas-driven turbine generator) to measure the load output of the gas turbine generator (gas-driven turbine generator) under the current gas conditions. The purpose of testing with different loads is to simulate the change in electrical load when multiple measurement or transmission modules are connected to the downhole measurement while drilling system. Within this range of change, the output of the gas-driven turbine generator must meet the high-power transmission requirements of the electromagnetic wave and microwave signal source of the gas drilling downhole measurement while drilling system, while also ensuring the reliable operation of various electrical modules.

[0057] The purpose of pressure monitoring at both the front end (the end of the gas-driven turbine generator near the test duct) and the rear end (the other end of the gas-driven turbine generator near the test duct) of the turbine generator (air-driven turbine generator) is to monitor and calculate the pressure difference ΔP (the difference between the inlet and outlet pressures) between these two test points. This represents the work done by the airflow on the turbine of the turbine generator (air-driven turbine generator) and the pressure loss as it flows through the turbine generator body. The pressure loss is primarily due to the loss from the work done on the turbine of the turbine generator (air-driven turbine generator). A smaller pressure loss at the turbine generator (air-driven turbine generator) is more beneficial for the drill bit at the bottom of the well to obtain greater energy for rock breaking. However, the turbine generator... A low pressure loss at the generator (air-driven turbine generator) can lead to insufficient power output and work done by the turbine, making it difficult to meet the effective output of the turbine generator. Therefore, the turbine design of the turbine generator needs to consider minimizing the pressure loss at the turbine while meeting the power requirements of the measurement while drilling system. Thus, the purpose of installing front and rear air pressure gauges (inlet and outlet pressure gauges) in the testing device (the device for testing the output performance of the air-driven turbine generator while drilling) is to measure the pressure loss of the air-driven turbine generator. This can verify whether the theoretical calculation of the pressure loss of the air-driven turbine under the current gas conditions is correct, and also understand whether the pressure loss value affects the normal rock breaking of the drill bit.

[0058] The purpose of setting up a flow rate measurement (flow meter) at the front end of the turbine generator is to accurately determine the gas flow rate through the turbine. Combined with the nearby front-end pressure monitoring value (inlet pressure measured by the inlet pressure gauge), it provides basic data support for the design of the turbine shape. At the end, a system pressure control mechanism (control ball valve) is connected to make the pressure of the entire test environment controllable by adjusting the diameter of the gas outlet channel, ensuring that the pressure can always be consistent with the actual pressure at the bottom of the gas drilling well.

[0059] Figure 1 A schematic diagram of an apparatus layout for testing the output performance of a gas-driven turbine generator during drilling is shown. The testing apparatus mainly includes a gas compressor 1 for acquiring gas; a gas booster 3 for pressurizing the gas; an electric heating belt 4 for regulating the gas temperature; a flow meter 5, an inlet pressure gauge 6, and a thermometer 7 for measuring the gas flow rate, pressure, and temperature at the inlet end, respectively; a test duct 8 for placing the gas-driven turbine generator 9; a load resistor 10 for applying variable load to the gas-driven turbine generator; an output test point 11 for measuring the output voltage of the gas-driven turbine generator under load; an outlet pressure gauge 12 for measuring the pressure of the gas after passing through the generator (drilling turbine generator); and a control ball valve 13 for adjusting the gas pressure in the test duct.

[0060] Considering the large gas volume required during gas drilling operations, multiple gas compressors are used in parallel to obtain the gas source. The output gas volume of the gas compressors can be adjusted. Therefore, the air intake of the test device (the device for testing the output performance of the gas-driven turbine generator while drilling) can be precisely controlled by increasing or decreasing the number of gas compressors and adjusting the output gas volume of the gas compressors. After the gas compressors obtain atmospheric pressure gas, they perform a first-stage compression booster. Considering that the compressed gas pressure generally cannot reach the actual pressure value at the bottom of the gas drilling well, a gas booster is needed to further boost the compressed gas. The compressed gas output from multiple gas compressors is collected into the gas booster through high-pressure pipeline 2. The gas pressure after being boosted by the gas booster meets the pressure value required at the bottom of the gas drilling well. At this time, the high-pressure gas source of the test device is realized. The high-pressure gas generated from the gas booster is transported to the air intake end of the test air duct through high-pressure pipeline 2.

[0061] Maintaining the gas pressure in the test duct requires control by adjusting the gas outlet diameter using a control ball valve at the tail end. Although the inlet gas in the test duct is high-pressure gas, if the gas outlet is opened, the gas pressure inside the test duct cannot be maintained, making it difficult to simulate the bottom hole pressure conditions of gas drilling. Therefore, by adjusting the control ball valve, the gas pressure in the test duct is kept stable. At the same time, for the design of the air-driven turbine (turbine) of the precision turbine generator, the control ball valve is adjusted so that the pressure value of the inlet pressure gauge near the turbine in the test duct is consistent with the bottom hole pressure of gas drilling.

[0062] like Figure 2 As shown, in addition, the present invention also provides a method for testing the output performance of a drilling gas-driven turbine generator, based on the apparatus for testing the output performance of a drilling gas-driven turbine generator described in any one of the above claims, the method for testing the output performance of a drilling gas-driven turbine generator includes:

[0063] S1. The gas injection volume, pressure and temperature are adjusted one by one by the gas compressor, gas booster and electric heating belt to simulate the actual working conditions at the bottom of the well when the gas drilling is at different depths and gas volumes.

[0064] S2. Connect one end of different load resistors to the output terminal of the air-driven turbine generator in sequence, and measure the voltage value of the three-phase AC power output by the air-driven turbine generator under different load conditions at the other end of the load resistor.

[0065] S3. Based on the voltage values, analyze the load-bearing output performance of the air-driven turbine generator under different operating conditions.

[0066] The beneficial effects of adopting the technical solution of this invention are as follows: By using a ground testing device to adjust the pressure, temperature, and volume of the incoming gas, the actual working conditions of gas drilling at different well depths and with different gas volumes are simulated. Once the gas pressure and temperature are adjusted to be consistent with the working conditions at the bottom of the gas drilling well, the output performance of the gas-driven turbine generator is tested. By connecting various load resistors of different specifications to the output terminal of the gas-driven turbine generator, the voltage of the three-phase AC power output by the gas-driven turbine generator under different load conditions is measured. The output voltage is a power parameter for judging whether the gas drilling downhole measurement-while-drilling system can work normally. In addition, the output voltage combined with the load resistor can determine the output power of the gas-driven turbine generator, which is also a basic parameter of the output performance of the gas-driven turbine generator. The output power can be used to calculate the turbine speed of the gas-driven turbine generator. The turbine speed is related to the output voltage of the gas-driven turbine generator. The design speed of the gas-driven turbine generator is judged by the voltage value output under load. This facilitates testing whether the output voltage of the gas-driven turbine generator is within the allowable voltage range, and allows for the detection of the gas-driven turbine generator's load output under different pressures, temperatures, and gas volumes. This ensures that the output voltage of the gas-driven turbine generator meets both the high-power transmission requirements of the electromagnetic wave and microwave signal sources of the gas drilling downhole measurement-while-drilling system and the reliable operation of various power modules in the system.

[0067] By adjusting the gas pressure, temperature, and volume, the actual working conditions at the bottom of the well can be simulated at different depths and gas volumes during gas drilling on the ground, so as to test the load-bearing output performance of the gas-driven turbine generator under different working conditions.

[0068] Furthermore, step S3 is followed by:

[0069] S4. Measure the gas flow rate, inlet pressure, and outlet pressure one by one using a flow meter, inlet pressure gauge, and outlet pressure gauge.

[0070] S5. Calculate the pressure difference based on the intake pressure and the outlet pressure to provide data support for the design of the turbine shape.

[0071] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Inlet and outlet pressure gauges are installed at the front and rear ends of the gas-driven turbine generator in the test duct to verify the pressure loss data of the gas-driven turbine generator. This pressure loss data is used to determine how much of the pressure loss supplied to the drill bit is occupied by the gas-driven turbine generator, because only when the pressure loss supplied to the drill bit is sufficient can the normal operation of gas drilling be guaranteed. Setting a flow velocity measurement at the front end of the gas-driven turbine generator aims to accurately grasp the gas flow velocity through the turbine. Combined with the pressure monitoring value of the nearby front end, this provides basic data support for the turbine's shape design. The gas flow velocity required for the gas-driven turbine design can be measured by the flow meter at the turbine's front end. Combined with the pressure value of the inlet pressure gauge of the nearby turbine, the data required for turbine design calculations can be provided. During testing, if the output voltage under load does not meet the requirements, the turbine can be redesigned.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the output performance of a drilling-while-drilling gas-driven turbine generator, characterized in that, include: The test chamber includes a gas compressor for acquiring gas, a gas booster for pressurizing the gas, an electric heating belt for regulating the gas temperature, a test duct, a gas-driven turbine generator, a load resistor for applying variable load to the gas-driven turbine generator, and a control ball valve for regulating the gas pressure in the test duct. The gas compressor is connected to the gas booster, which is connected to one end of the test duct. The electric heating belt is fitted onto the outer wall of one end of the test duct. The gas-driven turbine generator is installed in the middle of the test duct. One end of the load resistor is connected to the output of the gas-driven turbine generator. The control ball valve is installed at the other end of the test duct; the load resistor is located outside the test duct, and the other end of the load resistor is provided with an output test point for measuring the load output voltage of the gas-driven turbine generator; there are multiple gas compressors, and all of the gas compressors are connected to the gas booster; the test duct is connected to a flow meter for measuring gas flow rate, an inlet pressure gauge for measuring inlet pressure, a thermometer for measuring gas temperature, and an outlet pressure gauge, and the gas-driven turbine generator is located between the inlet pressure gauge and the outlet pressure gauge.

2. The apparatus for testing the output performance of a drilling gas-driven turbine generator according to claim 1, characterized in that, The flow meter, the inlet pressure gauge, the thermometer, and the outlet pressure gauge are all located on the outside of the test air duct.

3. The apparatus for testing the output performance of a gas-driven turbine generator while drilling, as described in claim 1, is characterized in that... The test duct is made of metal.

4. The apparatus for testing the output performance of a drilling gas-driven turbine generator according to claim 1, characterized in that, The gas compressor is connected to the gas booster via a pipeline, and the gas booster is connected to one end of the test air duct via a pipeline.

5. The apparatus for testing the output performance of a gas-driven turbine generator while drilling, as described in claim 1, is characterized in that... The inner diameter of the test duct is matched with the inner diameter of the drill string.

6. A method for testing the output performance of a gas-driven turbine generator during drilling, characterized in that, Based on the apparatus for testing the output performance of a drilling gas-driven turbine generator according to any one of claims 1 to 5, the method for testing the output performance of a drilling gas-driven turbine generator includes: S1. The gas injection volume, pressure and temperature are adjusted one by one by the gas compressor, gas booster and electric heating belt to simulate the actual working conditions at the bottom of the well when the gas drilling is at different depths and gas volumes. S2. Connect one end of different load resistors to the output terminal of the air-driven turbine generator in sequence, and measure the voltage values ​​of the three-phase AC power output by the air-driven turbine generator under different load conditions at the other end of the load resistor. S3. Based on the voltage values, analyze the load-bearing output performance of the air-driven turbine generator under different operating conditions.

7. The method for testing the output performance of a drilling gas-driven turbine generator according to claim 6, characterized in that, Step S3 is followed by: S4. Measure the gas flow rate, inlet pressure, and outlet pressure one by one using a flow meter, inlet pressure gauge, and outlet pressure gauge. S5. Calculate the pressure difference based on the intake pressure and the outlet pressure to provide data support for the design of the turbine shape.

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