A multi-working condition simulation test system and test method for downhole instruments and tools

Abstract

The present invention provides a multi-working condition simulation test system and test method for downhole instruments and tools, wherein the test system includes a fluid circulation module, a four-way interface, a flow meter, a pressure sensor, a signal transmission module, a centralized monitoring module, a test tool platform, a well depth simulation module, and a high-pressure simulation module. The test tool platform includes a vibration unit, a rotation unit, an axle load unit, a high-temperature unit, and a short circuit. The test method includes the steps of setting test parameters, adjusting the well depth length, vibration frequency and amplitude, drilling thrust, drilling rotation speed, simulated temperature, and simulated pressure, so that the circulating fluid circulates, the downhole instrument is tested, the flow and pressure data are collected and recorded, the test parameters are changed, and the test is repeated multiple times. The test system of the present invention can provide comprehensive simulation conditions such as circulation, high temperature, high pressure, rotation, and vibration. The test method of the present invention can test the operating conditions of downhole instruments and tools under different downhole working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of ground testing of downhole instruments and tools, and in particular to a multi-working condition simulation test system and a test method for downhole instruments and tools. Background Art

[0002] With the rapid development of drilling and completion technologies, a large number of downhole drilling and completion instrument and tool products have emerged both domestically and internationally. In order to meet the needs of drilling and completion for "deep, low, offshore, and non-deep" oil and gas resources, a large amount of research work has been carried out on new drilling and completion instrument and tool products. However, due to the lack of an intermediate test platform, the existing model for new drilling and completion products is: after the successful development of the product, it is directly put into field testing after only indoor testing. This model has exposed many problems during the research and development process. First, the existing equipment and downhole instruments (such as MWD / LWD, screws, etc.) cannot be tested in simulated downhole conditions before being put on site, which may result in the inability to work properly after entering the well. In addition, since the reliability and maturity of the instrument and tool products have not been tested, non-production operation time will be increased, and there may also be safety hazards.

[0003] Therefore, in order to improve the conversion efficiency of downhole instrument and tool products and shorten the R&D cycle, it is necessary to provide a downhole instrument and tool multi-condition simulation test system with rich simulation function. This simulation test system can carry out ground reliability testing of downhole instruments and tools under comprehensive simulation conditions such as circulation, high temperature, high pressure, rotation, and vibration.

[0004] Chinese patent application number CN201310449191.5, entitled "High-Temperature and High-Pressure Simulation Test Device and Test Method for Downhole Tools," discloses a high-temperature and high-pressure simulation test device for downhole tools and a method for using the device to simulate testing of downhole petroleum tools. The device includes a low-pressure drive system, a high-pressure oil system, a high-temperature circulation system, a temperature and pressure measurement system, a simulated wellbore, and a computer-controlled data acquisition and video monitoring system. The device can simulate the operating conditions of oil drilling and completion tools under high-temperature and high-pressure conditions downhole, providing a robust reference for field applications. However, the device's structure for simulating high-temperature and high-pressure conditions differs from that of the present application, and it lacks the ability to simulate well depth.

[0005] A Chinese patent application with application number "CN201910209884.4" and titled "A Simulation Test System for Downhole Tools" discloses a simulation test system for downhole tools related to the field of oil and gas field development technology. The simulation test system includes a test wellbore, a temperature control system, a pressure control system, a force loading system, and a measurement and control system. The simulation test system simulates downhole working conditions (including temperature, pressure, and load, etc.) by setting up a test wellbore, a temperature control system, a pressure control system, and a force loading system, and tests downhole tools under these conditions. The temperature in the test wellbore simulated by this test system can reach 200°C and the pressure can reach above 140MPa, which can meet the testing requirements of downhole tools and can be effectively used for subsequent testing and evaluation of downhole tools such as dividers, bridge plugs, sleeves, and chokes. However, this device has a different structure from the simulation unit or device for simulating high temperature, high pressure, and load in this application, and cannot simulate the operation of downhole instruments and tools under real vibration conditions downhole. Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention aims to address one or more of the above-mentioned problems. For example, one of the objectives of the present invention is to provide a multi-condition simulation test system and test method for downhole instruments and tools that can simulate different downhole operating conditions and test downhole instruments and tools.

[0007] In order to achieve the above-mentioned object, the present invention provides a multi-working condition simulation test system for downhole instruments and tools, which includes a fluid circulation module, a four-way interface, a flow meter, a pressure sensor, a signal transmission module, a centralized monitoring module, a test tool platform, a well depth simulation module and a high-pressure simulation module, wherein:

[0008] The fluid circulation module is configured to supply and circulate the recycled circulating fluid;

[0009] The first interface of the four-way interface is connected to the outlet of the fluid circulation module;

[0010] The inlet of the well depth simulation module is connected to the second interface of the four-way interface, and the outlet is connected to the inlet of the test tool platform. The well depth simulation module can simulate different cycle lengths;

[0011] The test tool platform is connected to the third interface of the four-way interface. The test tool platform includes a vibration unit, a rotation unit, an axle load unit, a high-temperature unit and a short circuit, and can simulate the vibration, rotation, bit pressure and high-temperature environment of the test instrument and tool, as well as monitor the internal status of the test instrument and tool;

[0012] The inlet of the high-pressure simulation module is connected to the outlet of the test tool platform, and the outlet is connected to the inlet of the fluid circulation module. The high-pressure simulation module can control the pressure of the test instrument tool to simulate a high-pressure environment;

[0013] The inlet of the signal transmission module is connected to the fourth interface of the four-way interface, and the outlet is connected to the inlet of the fluid circulation module. The signal transmission module can send a control command signal to the test instrument tool;

[0014] The pressure sensor and flow meter can monitor the pressure and flow at the corresponding position in real time;

[0015] The centralized monitoring module can monitor and collect the status parameters of the multi-condition simulation test system and the operating status parameters of the test instruments and tools during the test process.

[0016] According to an exemplary embodiment of an aspect of the present invention, the vibration unit may include a main platform, a lower platform, a Z-direction vibration mechanism, an X-direction vibration mechanism, a Y-direction vibration mechanism and a support column, wherein:

[0017] The support column is vertically arranged and has an adjustable height, and the lower platform is arranged on the support column and its bottom surface is slidably connected to the upper end of the support column;

[0018] One end of the Y-direction vibration mechanism is fixedly arranged on the ground, and the other end is hinged to one side of the lower platform to drive the lower platform to move in the Y direction to simulate Y-direction vibration;

[0019] The main platform is arranged above the lower platform and parallel to the lower platform, and the main platform is used to fix the test instruments and tools;

[0020] One end of the Z-direction vibration mechanism is fixed to the lower platform, and the other end is rotatably connected to the bottom surface of the main platform to drive the main platform to move in the Z direction to simulate Z-direction vibration;

[0021] One end of the X-direction vibration mechanism is fixed on the lower platform, and the other end is hinged to one side of the main platform to drive the main platform to move in the X-direction to simulate X-direction vibration.

[0022] According to an exemplary embodiment of one aspect of the present invention, the X-direction vibration mechanism may include a telescopic mechanism, a fixed rod, a triangular hinge mechanism and a rod hinge mechanism, wherein the fixed rod and the telescopic mechanism are vertically fixed on the upper end surface of the lower platform, a left corner of the triangular hinge mechanism is hinged to the upper end of the telescopic mechanism, a middle corner is hinged to the upper end of the fixed rod, a right corner is hinged to one end of the rod hinge mechanism, and the other end of the rod hinge mechanism is rotatably connected to the side of the main platform.

[0023] According to an exemplary embodiment of one aspect of the present invention, the Y-direction vibration mechanism may include a telescopic mechanism, a fixed rod, a triangular hinge mechanism and a rod hinge mechanism, wherein the fixed rod and the telescopic mechanism are vertically fixed on the ground, a left corner of the triangular hinge mechanism is hinged to the upper end of the telescopic mechanism, a middle corner is hinged to the upper end of the fixed rod, a right corner is hinged to one end of the rod hinge mechanism, and the other end of the rod hinge mechanism is rotatably connected to the side of the lower platform.

[0024] According to an exemplary embodiment of one aspect of the present invention, the Z-direction vibration mechanism may include a telescopic mechanism and a rotary hinge mechanism, wherein the telescopic mechanism is vertically fixed on the upper end surface of the lower platform, and one end of the rotary hinge mechanism is hinged to the upper end of the telescopic mechanism, and the other end is hinged to the lower end surface of the main platform.

[0025] According to an exemplary embodiment of one aspect of the present invention, a slide rail may be provided on the X-direction side surface of the main platform to ensure X-direction vibration of the main platform on a horizontal plane;

[0026] A slide rail may be provided on the Y-direction side surface of the lower platform to ensure the Y-direction vibration of the main platform on the horizontal plane.

[0027] According to an exemplary embodiment of an aspect of the present invention, the rotating unit may include a faucet, which is provided between the upstream end of the test instrument tool and the circulation pipeline and can control the rotation of the test instrument tool.

[0028] According to an exemplary embodiment of an aspect of the present invention, the short circuit may include a signal transmission short circuit, a signal reception short circuit and a power supply short circuit, wherein,

[0029] The signal sending short circuit and the signal receiving short circuit are arranged at the upstream end of the test instrument tool, and the signal sending short circuit and the signal receiving short circuit can realize the monitoring and control of the test instrument tool;

[0030] The power short circuit can provide electrical energy to the test instrument tool.

[0031] According to an exemplary embodiment of an aspect of the present invention, the high temperature unit may include a heat preservation mechanism and a heating mechanism, and the heating mechanism and the heat preservation mechanism are provided outside the test instrument tool to control the temperature of the test instrument tool.

[0032] According to an exemplary embodiment of an aspect of the present invention, the axle load unit may include a thrust bearing, a thrust block, a thrust rod mechanism and a control device, wherein:

[0033] The thrust bearings are arranged at both ends of the test instrument tool to ensure that the test instrument tool rotates horizontally;

[0034] The thrust block is arranged at the downstream end of the test instrument tool and is located on the right side of the thrust bearing;

[0035] A thrust rod mechanism and a control device are sequentially arranged on the right side of the thrust block. The thrust rod mechanism can apply axial thrust to the thrust block, and the control device can control the magnitude of the applied force.

[0036] According to an exemplary embodiment of one aspect of the present invention, the well depth simulation module may include a central pipeline and one or more coiled tubing coils, wherein each coiled tubing coil in the one or more coiled tubing coils is connected in series and its outlet is connected to the central pipeline, and an on / off valve is provided at the inlet and outlet of each coiled tubing coil;

[0037] The outlet of the collecting pipeline is communicated with the inlet of the test tool platform. A switch valve and a pressure sensor are provided on the collecting pipeline between the outlets of two adjacent continuous tubing coils.

[0038] According to an exemplary embodiment of one aspect of the present invention, the high-pressure simulation module may be a section of parallel pipelines, in which only a valve is provided on one pipeline of the parallel pipeline, and an automatic regulating valve and a valve are provided on the other pipeline. The automatic regulating valve can control the circulation flow rate to realize the simulation of the high-pressure conditions of the test instrument tool.

[0039] According to an exemplary embodiment of one aspect of the present invention, the flow meter may be provided on the outlet pipe of the high-pressure simulation module and the inlet pipe of the signal transmission module for real-time monitoring of the flow rate;

[0040] The pressure sensor can be arranged on the inlet pipeline and the outlet pipeline of the test tool platform and the inlet pipeline of the signal transmission module for real-time pressure monitoring.

[0041] According to an exemplary embodiment of an aspect of the present invention, the fluid circulation module may include a circulation tank, a filter, an injection pump, a slurry pump and a sedimentation tank, wherein:

[0042] The filter, the perfusion pump and the mud pump are sequentially arranged on the pipeline connecting the circulation tank and the first interface of the four-way interface, and the filter is close to the outlet of the circulation tank;

[0043] The sedimentation tank is arranged on the outlet pipeline of the high-pressure simulation module and the outlet pipeline of the signal transmission module.

[0044] Another aspect of the present invention provides a multi-condition simulation test method for downhole instruments and tools. The test method can be implemented by the multi-condition simulation test system for downhole instruments and tools as described above, and the test method includes the following steps:

[0045] Set various test parameters for testing downhole instruments and tools;

[0046] Adjust the corresponding well depth simulation length, vibration simulation frequency and amplitude, drilling simulation thrust, drilling simulation rotation speed, high temperature simulation temperature and high pressure simulation circulation pressure in the test system;

[0047] Make the circulating fluid circulate in the test system to conduct functionality and reliability tests on downhole instruments;

[0048] Collect and record the flow and pressure data on each pipeline during the test;

[0049] Change the test parameters, repeat the test multiple times, and record the test data.

[0050] Compared with the prior art, the present invention has the following advantages:

[0051] (1) The multi-condition simulation test system for downhole instruments and tools proposed in the present invention has rich simulation function and can carry out ground reliability tests on downhole instruments and tools under comprehensive simulation conditions such as circulation, high temperature, high pressure, rotation, and vibration;

[0052] (2) The multi-operating-condition simulation test system for downhole instruments and tools proposed in the present invention can improve the conversion efficiency of downhole instrument and tool products and shorten the R&D cycle;

[0053] (3) The multi-condition simulation test system for downhole instruments and tools proposed in the present invention can reduce non-productive operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and other objects and features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0055] Figure 1 A schematic structural diagram of an exemplary embodiment of a downhole instrument and tool multi-working condition simulation test system of the present invention is shown;

[0056] Figure 2 Shown Figure 1 Schematic diagram of the structure of the experimental tool platform.

[0057] Reference numerals:

[0058] 1- fluid circulation module, 101- circulation tank, 102- filter, 103- priming pump, 104- mud pump, 105- sedimentation tank;

[0059] 2-four-way interface;

[0060] 3-flow meter, 301-flow meter F1, 302-flow meter F2;

[0061] 4-pressure sensor, 401-pressure sensor PIA1, 402-pressure sensor PIA2, 403-pressure sensor PIA3, 404-pressure sensor PIA4, 405-pressure sensor PIA5, 406-pressure sensor PIA6, 407-pressure sensor PIA7, 408-pressure sensor PIA8;

[0062] 5-valve, 501-valve V1, 502-valve V2, 503-valve V3, 504-valve V4, 505-valve V5, 506-valve V6, 507-valve V7, 508-valve V8, 509-valve V9, 510-valve V10, 511-valve V11, 512-valve V12, 513-valve V13, 514-valve V14, 515-valve V15, 516-valve V16, 517-valve V17, 518-valve V18;

[0063] 6-Signal downlink device;

[0064] 7-Data centralized monitoring and control center;

[0065] 8-Test tool platform, 801-Main platform, 802-Lower platform, 803-Retractable mechanism, 804-Fixed rod, 805-Triangular hinge mechanism, 806-Rod hinge mechanism, 807-Rotary hinge mechanism, 808-Support column, 809-Slide rail, 810-Faucet, 811-Connecting joint, 812-High-pressure hose, 813-Thrust bearing, 814-Thrust block, 815-Thrust rod mechanism, 816-Control device, 817-Heating mechanism, 818-Insulation mechanism, 819-Signal sending short circuit, 820-Signal receiving short circuit, 821-Power supply short circuit, 822-Test instrument tools;

[0066] 9-Summary pipeline;

[0067] 10-Coiled tubing coil;

[0068] 11-Automatic regulating valve. DETAILED DESCRIPTION

[0069] Hereinafter, a downhole tool multi-operating condition simulation test system and test method of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0070] It should be noted that terms such as "first," "second," "third," "fourth," "fifth," "sixth," "V," "F," and "PIA" are used solely for ease of description and distinction and are not to be construed as indicating or implying relative importance. Terms such as "upper," "lower," "inner," "outer," "left," "right," "front," "back," "center," and "bottom" are used solely for ease of description and to establish relative orientations or positions, and are not to indicate or imply that the referenced components must have such specific orientations or positions.

[0071] Figure 1 A schematic structural diagram of an exemplary embodiment of a downhole instrument and tool multi-working condition simulation test system of the present invention is shown; Figure 2 Shown Figure 1 Schematic diagram of the structure of the experimental tool platform.

[0072] In the first exemplary embodiment of the present invention, the downhole instrument tool multi-condition simulation test system mainly includes a fluid circulation module, a four-way interface, a flow meter, a pressure sensor, a signal transmission module, a centralized monitoring module, a test tool platform, a well depth simulation module and a high-pressure simulation module. Figure 1 As shown in FIG, the fluid circulation module 1 is configured to supply and circulate a circulating fluid, and the outlet of the fluid circulation module is connected to the first interface of the four-way interface 2. Here, the circulating fluid can be clean water, mud, gas, or a two-phase flow of a mixture of gas and mud.

[0073] The inlet of the well depth simulation module is connected to the second interface of the four-way interface 2, and the outlet of the well depth simulation module is connected to the inlet of the test tool platform 8. The well depth simulation module can simulate different cycle lengths.

[0074] The test tool platform 8 is connected to the third port of the four-way interface 2 via valve V13513 for short-distance circulation. This pipeline can also be connected to other outlets via a tee for connecting other test modules. The test tool platform includes a vibration unit, a rotation unit, an axle load unit, a high-temperature unit, and a short circuit. It can simulate the complex vibration conditions, rotation, bit pressure, and high-temperature environments of test instruments and tools, as well as monitor the internal status of the test instruments and tools.

[0075] The inlet of the high-pressure simulation module is connected to the outlet of the test tool platform 8. A pressure-regulating valve is installed on the outlet pipeline of the test tool platform 8 to provide internal high-pressure conditions for the test instruments and tools, thereby simulating bottomhole working conditions. The outlet of the high-pressure simulation module is connected to the inlet of the fluid circulation module 1. The high-pressure simulation module can control the pressure of the test instruments and tools to simulate different high-pressure environments.

[0076] The inlet of the signal transmission module is connected to the fourth interface of the four-way interface 2, and the switch is controlled by valve V18518. The outlet of the signal transmission module is connected to the inlet of the fluid circulation module 1. The signal transmission module includes a signal transmission device 6, which can send control command signals to the test instrument and tool. All simulation condition parameters can be adjusted according to the working conditions of the simulated object. Specifically, the signal transmission device can release pressure of different frequencies or amplitudes on the main line through the relief valve in the device, which is reflected in the pressure fluctuations of different frequencies and amplitudes on the main line. The pressure fluctuations are transmitted forward to the test instrument and tool through the circulating fluid in the pipeline, so that the tool can receive the command signal transmitted from a long distance (simulating the wellhead transmitting the signal to the downhole tool instrument). The access position of the pipeline equipped with the signal transmission device can be any available position on the main line near the mud pump outlet.

[0077] The pressure sensor 4 and the flow meter 3 can monitor the pressure and flow at the corresponding positions in real time.

[0078] The centralized monitoring module includes a data centralized monitoring and control center 7, which is connected to the pressure sensor 4, flow meter 3 and valve 5 in the test system. It can monitor and collect the status parameters of the multi-condition simulation test system and the operating status parameters of the test instruments and tools during the test. All test parameters can be monitored, recorded and analyzed in real time.

[0079] In this exemplary embodiment, the test tool platform is a comprehensive test bench device for testing downhole instruments and tools, which can apply lateral, vertical and axial (X, Z, Y directions) vibration simulation loads to the test instruments and tools. The vibration unit of the test tool platform can simulate the operation of downhole instruments and tools under real vibration conditions in the well. The vibration unit may include a main platform, a lower platform, a Z-direction vibration mechanism, an X-direction vibration mechanism, a Y-direction vibration mechanism and a support column. Figure 2 As shown in , the support column 808 is vertically set on the ground and its height is adjustable. The lower platform 802 is set on the support column 808 and its bottom surface is slidably connected to the upper end of the support column. Here, a two-way rod hinge can be set on the upper part of the support column to connect with the lower platform. Multiple groups of support columns can be set under the lower platform, and adjacent support columns are spaced a certain distance apart. The main weight of the lower platform is borne by the lower support column. Figure 2As shown in , three groups of support columns 808 are arranged below the lower platform 802. One end of the Y-direction vibration mechanism is fixedly set on the ground, and the other end is hinged to one side of the lower platform 802 to drive the lower platform to move in the Y direction to simulate Y-direction vibration. The main platform 801 is arranged above the lower platform 802 and parallel to the lower platform, and the main platform is used to fix the test instrument tool 822. One end of the Z-direction vibration mechanism is fixed on the lower platform 802, and the other end is rotatably connected to the bottom surface of the main platform 801 to drive the main platform to move in the Z direction to simulate Z-direction vibration. One end of the X-direction vibration mechanism is fixed on the lower platform 802, and the other end is hinged to one side of the main platform 801 to drive the main platform to move in the X direction to simulate X-direction vibration. All vibration simulation parameters can be adjusted, and data monitoring is performed by an acceleration sensor. Here, the acceleration sensor can be arranged inside the test instrument tool.

[0080] In this exemplary embodiment, Figure 2 As shown in FIG, the X-axis vibration mechanism of the test tool platform may include a retractable mechanism 803, a fixed rod 804, a triangular hinge mechanism 805, and a rod hinge mechanism 806. Fixed rod 804 and retractable mechanism 803 are located on the left side of lower platform 802, with fixed rod 804 located on the right side of retractable mechanism 803. Both fixed rod 805 and retractable mechanism 803 are vertically fixed to the upper end surface of lower platform 802. The left corner of triangular hinge mechanism 805 is hinged to the upper end of retractable mechanism 803, the middle corner is hinged to the upper end of fixed rod 804, and the right corner is hinged to one end of rod hinge mechanism 806. The other end of rod hinge mechanism 806 is rotatably connected to the left side of main platform 801. X-axis vibration is achieved by rotating the triangular hinge mechanism through the vertical extension and contraction of the retractable mechanism, which in turn drives the main platform to move horizontally in the X direction via the rod hinge mechanism to simulate X-axis vibration. Here, multiple sets of X-axis vibration mechanisms may be located below the left side of the main platform.

[0081] In this exemplary embodiment, Figure 2 As shown in the figure, the Y-axis vibration mechanism of the test tool platform may include a retractable mechanism 803, a fixed rod 804, a triangular hinge mechanism 805, and a rod hinge mechanism 806. The fixed rod 804 and the retractable mechanism 803 are vertically fixed on the ground, with the fixed rod located behind the retractable mechanism. The fixed rod and the retractable mechanism are both located below the front side of the lower platform. Figure 2In the middle test tool platform, in the Y-direction vibration mechanism, a left corner of the triangular hinge mechanism 805 is hinged to the upper end of the telescopic mechanism 803, a middle corner is hinged to the upper end of the fixed rod 804, and a right corner is hinged to one end of the rod hinge mechanism 806. The other end of the rod hinge mechanism 806 is rotatably connected to the front side of the lower platform 802. The Y-direction vibration is achieved by driving the triangular hinge mechanism to rotate through the lifting and lowering of the telescopic mechanism, and driving the lower platform to move horizontally in the Y direction through the rod hinge mechanism to simulate the Y-direction vibration. The vertical telescopic movement of the telescopic mechanism can be converted into the Y-direction horizontal movement of the lower platform through the triangular hinge mechanism and the rod hinge mechanism to simulate the Y-direction vibration. Here, multiple groups of Y-direction vibration mechanisms can be set below the front side of the lower platform. As shown in FIG. Figure 2 As shown in FIG, three sets of Y-direction vibration mechanisms are provided below the front side of the lower platform 802.

[0082] In this exemplary embodiment, Figure 2 As shown in the figure, the Z-direction vibration mechanism of the test tool platform may include a retractable mechanism 803 and a rotary hinge mechanism 807. The retractable mechanism 803 is vertically fixed on the upper end surface of the lower platform 802. One end of the rotary hinge mechanism 807 is hinged to the upper end of the retractable mechanism 803, and the other end is hinged to the lower end surface of the main platform 801. Here, a hinge may be provided above the rotary hinge mechanism to form a two-way rod hinge (not shown in the figure) to ensure that the main platform can move along the X direction on the slide rail while vibrating along the Z direction. The vertical vibration of the main platform in the Z direction can be achieved by the telescopic movement of the retractable rod mechanism. By providing a rotary hinge mechanism, it is possible to ensure that the main platform is in a horizontal position while the test tool platform vibrates up and down.

[0083] In this exemplary embodiment, Figure 2 As shown in the figure, the X-direction side of the main platform 801 can be provided with a slide rail 809 to ensure the X-direction vibration of the main platform on the horizontal plane. The Y-direction side of the lower platform 802 can be provided with a slide rail 809. The slide rail provided on the lower platform is connected to the basic fixing device (not shown) and is kept horizontal to the ground, which can ensure the Y-direction vibration of the main platform on the horizontal plane. Here, the slide rail provided on the lower platform is connected to the basic fixing device to bear the weight of the lower platform, thereby achieving the support function of the support column.

[0084] In this exemplary embodiment, Figure 2 As shown in , the rotation unit of the test tool platform may include a faucet 810. The faucet 810 is connected to the upstream end of the test instrument tool 822 through a connecting joint 811. The faucet can apply a rotation speed to the test instrument tool to achieve rotation control of the test instrument tool. The faucet 810 can also guide the circulating fluid flowing from the circulation pipeline into the test instrument tool. Both ends of the test instrument tool 822 are connected to the external circulation pipeline through a high-pressure hose 812. Figure 1As shown in FIG, a valve V14514 is provided on the inlet pipeline of the test instrument tool to control the circulating fluid from entering the test instrument tool.

[0085] In this exemplary embodiment, Figure 2 As shown in , the short circuit of the test tool platform may include a signal sending short circuit 819, a signal receiving short circuit 820 and a power supply short circuit 821. Among them, the signal sending short circuit 819 and the signal receiving short circuit 820 are sequentially arranged at the upstream end of the test instrument tool 822, and the signal receiving short circuit 820 is connected to the test instrument tool 822. The signal sending short circuit 819 can remotely transmit parameter data to the signal receiving short circuit 820 to realize the monitoring of the internal state parameters of the test instrument tool 822. The signal receiving short circuit 820 can collect the operating state parameters of the test instrument tool 822 in real time and monitor the status of the test instrument tool 822 through Figure 1 The data in the monitoring and control center 7 is displayed and analyzed. The signal receiving short circuit 820 can also receive data from Figure 1 The control signal of the signal transmission device 6 in the signal transmission device 6 is received, and the corresponding state of the test instrument and tool is controlled by receiving the control signal. The power short-circuit 821 can provide electrical energy for the test instrument and tool 822, and realize the energized online operation of the test instrument and tool under the rotational vibration working condition by short-circuiting with external electric energy. The setting position of the power short-circuit does not need to be specifically limited, and can be located at any available position on the test tool platform, as long as it can realize the power supply to the test instrument and tool. Preferably, the power short-circuit 821 can be set at the downstream end of the test instrument and tool 822. Here, the power short-circuit can be a battery, or it can be a turbine generator and other short-circuit.

[0086] In this exemplary embodiment, Figure 2 As shown in , the high-temperature unit of the test tool platform may include a heat preservation mechanism 818 and a heating mechanism 817. The heating mechanism 817 is arranged on the outside of the test instrument tool 822 to provide temperature conditions for the outside of the test instrument tool. Here, the heating method of the heating mechanism can be various known and feasible heating methods such as electric heating, electromagnetic heating or steam heating. The heat preservation mechanism 818 is arranged on the outside of the heating mechanism 817 and can control the temperature of the test instrument tool. The heat preservation mechanism and the heating mechanism are used to control the temperature of the test instrument tool and realize the high-temperature environment simulation of the test instrument tool.

[0087] In this exemplary embodiment, the axle load unit of the test tool platform can apply a weight-on-bit load to the test instrument and tool to simulate downhole drilling conditions. Figure 2As shown in , the shaft load unit may include a thrust bearing 813, a thrust block 814, a thrust rod mechanism 815, and a control device 816. Multiple thrust bearings 813 may be provided, symmetrically arranged at both ends of the test instrument tool 822 to ensure horizontal rotation of the test instrument tool. The thrust block 814 is located at the downstream end of the test instrument tool 822 and to the right of the thrust bearing 813. A thrust rod mechanism 815 and a control device 816 are sequentially arranged to the right of the thrust block 814. The thrust rod mechanism 815 is capable of applying axial thrust to the thrust block 814, and the control device 816 is capable of controlling the magnitude of the force applied by the thrust rod mechanism 815. Through the thrust block 814, the axial thrust is ultimately applied to the test instrument tool 822, simulating the weight-on-bit load.

[0088] In this exemplary embodiment, Figure 1 As shown in , the well depth simulation module may include a collection pipeline 9 and one or more sets of continuous tubing coils 10. Among them, each set of continuous tubing coils in the more than one set of continuous tubing coils are connected in series with each other, and each set of continuous tubing coils is provided with an outlet, and each outlet is connected to the collection pipeline. The outlet of the collection pipeline 9 is connected to the inlet of the test tool platform 8. All the continuous tubing coils 10 pipelines are connected to the test tool platform 8 through the collection pipeline 9 for circulation testing. Here, the outlets of each set of continuous tubing coils can also be directly connected to the test tool platform for circulation testing. As shown in Figure 1 As shown in the figure, the well depth simulation module may include a collection pipeline 9 and six sets of coiled tubing coils 10. The outlet pipeline of the well depth simulation module is equipped with a valve V12512 to control the main line switch. The collection pipeline 9 located between the outlets of two adjacent coiled tubing coils 10 is also equipped with a switch valve and a pressure sensor 4. The pressure sensor 4 can monitor the pressure of different pipe sections in real time. Figure 1 As shown in FIG, a valve V3503 and a pressure sensor PIA4404 are installed on the pipeline connecting the outlets of the first and second coiled tubing coils; a valve V5505 and a pressure sensor PIA5405 are installed on the pipeline connecting the outlets of the second and third coiled tubing coils; a valve V7507 and a pressure sensor PIA6406 are installed on the pipeline connecting the outlets of the third and fourth coiled tubing coils; a valve V9509 and a pressure sensor PIA7407 are installed on the pipeline connecting the outlets of the fourth and fifth coiled tubing coils; and a valve V11511 and a pressure sensor PIA8408 are installed on the pipeline connecting the outlets of the fifth and sixth coiled tubing coils. On / off valves are installed at the inlet and outlet of each coiled tubing coil, as shown in FIG. Figure 1As shown in Figure 1, valve V1501 is installed on the inlet pipeline of the first coiled tubing coil, valve V2502 is installed on the inlet pipeline of the second coiled tubing coil (which also serves as the outlet pipeline of the previous coiled tubing coil), valve V4504 is installed on the inlet pipeline of the third coiled tubing coil, valve V6506 is installed on the inlet pipeline of the fourth coiled tubing coil, valve V8508 is installed on the inlet pipeline of the fifth coiled tubing coil, and valve V10510 is installed on the inlet pipeline of the sixth coiled tubing coil. By switching valves between coiled tubing coils, loop length requirements of varying distances can be met.

[0089] The long-distance circulation pipeline is composed of multiple sets of continuous tubing coils. The use of multiple sets of continuous tubing coils in series can meet the test requirements of different distance circulation lengths, thereby meeting the different well depth simulation circulation conditions of the test instruments and tools. Figure 1 As shown in , taking a set of continuous tubing coils with a length of 500 m as an example, if only a circulation distance of 500 m is required, the circulating fluid enters the well depth simulation module through valve V1501. After circulating 500 m through the first set of continuous tubing coils, since valves V2502, V4504, V6506, V8508 and V10510 are in the closed state, the circulating fluid directly enters the test tool platform 8 through the opened valves V3503, V5505, V7507, V9509, V11511 and V12512. To set a 1000m circulation distance, open valves V1501, V2502, V5505, V7507, V9509, V11511, and V12512, and close valves V3503, V4504, V6506, V8508, and V10510. To set a 1500m circulation distance, open valve V4504 and close valve V5505. Similarly, by opening or closing valves, you can switch between pipelines with different circulation distances.

[0090] In this exemplary embodiment, Figure 1 As shown in , the high-pressure simulation module can be a section of parallel piping. One section of the parallel piping is provided with valve V15515, which controls the opening and closing of the section. Another section of the parallel piping is provided with automatic regulating valve 11 and valve V16516, which are used to control the circulation flow rate and simulate the high-pressure environment of the test tool platform.

[0091] In this exemplary embodiment, Figure 1As shown in , the flow meter 3 can be set on the outlet pipe of the high-pressure simulation module and on the inlet pipe of the signal transmission module for real-time flow monitoring. A flow meter F1301 is set on the outlet pipe of the high-pressure simulation module, and a flow meter F2302 is set on the inlet pipe of the signal transmission device 6.

[0092] Pressure sensors 4 can be installed on the inlet and outlet pipelines of the test tool platform 8, as well as on the inlet pipeline of the signal transmission module, for real-time pressure monitoring. Pressure sensor PIA2402 and pressure sensor PIA1401 are installed on the inlet pipeline of the test tool platform 8. Pressure sensor PIA3403 is installed on the inlet pipeline of the signal transmission device 6.

[0093] In this exemplary embodiment, Figure 1 As shown in FIG, the fluid circulation module 1 may include a circulation tank 101, a filter 102, a perfusion pump 103, a mud pump 104, and a sedimentation tank 105. The filter 102, perfusion pump 103, and mud pump 104 are sequentially arranged on the pipeline connecting the circulation tank 101 and the first interface of the four-way interface 2, with the filter 102 being located near the outlet of the circulation tank 101. Two sedimentation tanks 105 may be provided, one on the outlet pipeline of the high-pressure simulation module and the other on the outlet pipeline of the signal downlink device 6, and the sedimentation tanks 105 are connected to the circulation tank 101.

[0094] The circulating fluid is stored in the circulation tank 101 and enters the mud pump 104 through the filter 102 and the priming pump 103. Valve V17517 controls the flow of circulating fluid into the mud pump 104. The circulating fluid of the test system is input into the pipeline through the mud pump 104. The outlet of the mud pump 104 is equipped with a four-way port 2. Through the four-way port 2, the circulating fluid can enter different test modules to perform different simulation tests on the test instruments and tools. After being discharged from the high-pressure simulation module and the signal transmission device 6, the circulating fluid flows into the sedimentation tank 105 for sedimentation before returning to the circulation tank 101 for the next cycle.

[0095] In a second exemplary embodiment of the present invention, the multi-condition simulation test method for downhole tools and instruments can be implemented by the multi-condition simulation test system for downhole tools and instruments described in the first exemplary embodiment, and the test method mainly includes the following steps:

[0096] Set various test parameters for testing downhole instruments and tools;

[0097] Adjust the corresponding well depth simulation length, vibration simulation frequency and amplitude, drilling simulation thrust, drilling simulation rotation speed, high temperature simulation temperature and high pressure simulation circulation pressure in the test system;

[0098] The circulating fluid is made to circulate in the test system to conduct reliability and functional tests on downhole instruments under complex working conditions simulating deep wells, such as long distance, high temperature, high pressure, rotation, vibration and bit pressure;

[0099] Collect and record the flow and pressure data on each pipeline during the test;

[0100] Change the test parameters, repeat the test multiple times, and record the test data.

[0101] In summary, the advantages proposed by the present invention include at least one of the following:

[0102] (1) The multi-condition simulation test system for downhole instruments and tools provided by the present invention can effectively simulate conditions such as high temperature and high pressure, rotation, vibration, and circulation, test the comprehensive reliability of downhole electronic circuit instruments and tools, and provide test conditions for the research and development and factory testing of instrument and tool products;

[0103] (2) The multi-condition simulation test system for downhole instruments and tools provided by the present invention can save the cost of field tests for downhole instruments and tools, reduce the safety risks of direct field tests, and increase the success rate of field applications of downhole instruments and tools;

[0104] (3) All test parameters in the multi-condition simulation test method for downhole instruments and tools provided by the present invention can be adjusted. The working status of downhole tools and instruments under different well depths (temperature, pressure and cycle length), different cycle displacements, different rotation speeds, different vibration types and intensities, and different drilling pressure conditions can be adjusted, and all test data can be monitored, recorded and analyzed in real time.

[0105] Although the above has described a multi-condition simulation test system and test method for downhole instruments and tools of the present invention in combination with exemplary embodiments, it should be clear to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A multi-working condition simulation test system for downhole instruments and tools, characterized in that: The test system includes a fluid circulation module, a four-way interface, a flow meter, a pressure sensor, a signal transmission module, a centralized monitoring module, a test tool platform, a well depth simulation module and a high-pressure simulation module, wherein: The fluid circulation module is configured to supply and circulate the recycled circulating fluid; The first interface of the four-way interface is connected to the outlet of the fluid circulation module; The inlet of the well depth simulation module is connected to the second interface of the four-way interface, and the outlet is connected to the inlet of the test tool platform. The well depth simulation module can simulate different cycle lengths; The test tool platform is connected to the third interface of the four-way interface. The test tool platform includes a vibration unit, a rotation unit, an axle load unit, a high-temperature unit and a short circuit, and can simulate the vibration, rotation, bit pressure and high-temperature environment of the test instrument and tool, as well as monitor the internal status of the test instrument and tool; The inlet of the high-pressure simulation module is connected to the outlet of the test tool platform, and the outlet is connected to the inlet of the fluid circulation module. The high-pressure simulation module can control the pressure of the test instrument tool to simulate a high-pressure environment; The inlet of the signal transmission module is connected to the fourth interface of the four-way interface, and the outlet is connected to the inlet of the fluid circulation module. The signal transmission module can send a control command signal to the test instrument tool; The pressure sensor and flow meter can monitor the pressure and flow at the corresponding position in real time; The centralized monitoring module can monitor and collect the status parameters of the multi-condition simulation test system and the operating status parameters of the test instruments and tools during the test process.

2. The downhole instrument and tool multi-condition simulation test system according to claim 1, characterized in that: The vibration unit includes a main platform, a lower platform, a Z-direction vibration mechanism, an X-direction vibration mechanism, a Y-direction vibration mechanism and a support column, wherein: The support column is vertically arranged and has an adjustable height, and the lower platform is arranged on the support column and its bottom surface is slidably connected to the upper end of the support column; One end of the Y-direction vibration mechanism is fixedly arranged on the ground, and the other end is hinged to one side of the lower platform to drive the lower platform to move in the Y direction to simulate Y-direction vibration; The main platform is arranged above the lower platform and parallel to the lower platform, and the main platform is used to fix the test instruments and tools; One end of the Z-direction vibration mechanism is fixed to the lower platform, and the other end is rotatably connected to the bottom surface of the main platform to drive the main platform to move in the Z direction to simulate Z-direction vibration; One end of the X-direction vibration mechanism is fixed on the lower platform, and the other end is hinged to one side of the main platform to drive the main platform to move in the X-direction to simulate X-direction vibration.

3. The downhole instrument and tool multi-condition simulation test system according to claim 2, characterized in that: The X-direction vibration mechanism includes a telescopic mechanism, a fixed rod, a triangular hinge mechanism and a rod hinge mechanism, wherein the fixed rod and the telescopic mechanism are vertically fixed on the upper end surface of the lower platform, a left corner of the triangular hinge mechanism is hinged to the upper end of the telescopic mechanism, a middle corner is hinged to the upper end of the fixed rod, a right corner is hinged to one end of the rod hinge mechanism, and the other end of the rod hinge mechanism is rotatably connected to the side of the main platform.

4. The downhole instrument and tool multi-condition simulation test system according to claim 2, characterized in that: The Y-direction vibration mechanism includes a telescopic mechanism, a fixed rod, a triangular hinge mechanism and a rod hinge mechanism, wherein the fixed rod and the telescopic mechanism are vertically fixed on the ground, a left corner of the triangular hinge mechanism is hinged to the upper end of the telescopic mechanism, a middle corner is hinged to the upper end of the fixed rod, a right corner is hinged to one end of the rod hinge mechanism, and the other end of the rod hinge mechanism is rotatably connected to the side of the lower platform.

5. The downhole instrument and tool multi-condition simulation test system according to claim 2, characterized in that: The Z-direction vibration mechanism includes a telescopic mechanism and a rotary hinge mechanism, wherein the telescopic mechanism is vertically fixed on the upper end surface of the lower platform, and one end of the rotary hinge mechanism is hinged to the upper end of the telescopic mechanism, and the other end is hinged to the lower end surface of the main platform.

6. The downhole instrument and tool multi-working condition simulation test system according to claim 2, characterized in that: A slide rail is provided on the X-direction side surface of the main platform to ensure the X-direction vibration of the main platform on the horizontal plane; A slide rail is provided on the Y-direction side surface of the lower platform to ensure the Y-direction vibration of the main platform on the horizontal plane.

7. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The rotating unit includes a faucet, which is arranged between the upstream end of the test instrument tool and the circulation pipeline and can control the rotation of the test instrument tool.

8. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The short circuit includes signal transmission short circuit, signal reception short circuit and power supply short circuit, wherein, The signal sending short circuit and the signal receiving short circuit are arranged at the upstream end of the test instrument tool, and the signal sending short circuit and the signal receiving short circuit can realize the monitoring and control of the test instrument tool; The power short circuit can provide electrical energy to the test instrument tool.

9. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The high temperature unit includes a heat preservation mechanism and a heating mechanism, and the heating mechanism and the heat preservation mechanism are arranged outside the test instrument tool to control the temperature of the test instrument tool.

10. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The axle load unit includes a thrust bearing, a thrust block, a thrust rod mechanism and a control device, wherein: The thrust bearings are arranged at both ends of the test instrument tool to ensure that the test instrument tool rotates horizontally; The thrust block is arranged at the downstream end of the test instrument tool and is located on the right side of the thrust bearing; A thrust rod mechanism and a control device are sequentially arranged on the right side of the thrust block. The thrust rod mechanism can apply axial thrust to the thrust block, and the control device can control the magnitude of the applied force.

11. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The well depth simulation module includes a collection pipeline and one or more sets of coiled tubing coils, wherein each set of the coiled tubing coils is connected in series and its outlet is connected to the collection pipeline, and each set of coiled tubing coils is provided with an on / off valve at its inlet and outlet; The outlet of the collecting pipeline is communicated with the inlet of the test tool platform. A switch valve and a pressure sensor are provided on the collecting pipeline between the outlets of two adjacent continuous tubing coils.

12. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The high-pressure simulation module is a section of parallel pipelines, one of which is only provided with a valve, and the other is provided with an automatic regulating valve and a valve. The automatic regulating valve can control the circulation flow rate to simulate the high-pressure conditions of the test instrument tool.

13. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The flow meter is provided on the outlet pipe of the high-pressure simulation module and the inlet pipe of the signal transmission module for real-time monitoring of flow; The pressure sensors are arranged on the inlet and outlet pipelines of the test tool platform and on the inlet pipeline of the signal transmission module for real-time pressure monitoring.

14. The downhole instrument and tool multi-working condition simulation test system according to claim 1, characterized in that: The fluid circulation module includes a circulation tank, a filter, an injection pump, a mud pump and a sedimentation tank, wherein: The filter, the perfusion pump and the mud pump are sequentially arranged on the pipeline connecting the circulation tank and the first interface of the four-way interface, and the filter is close to the outlet of the circulation tank; The sedimentation tank is arranged on the outlet pipeline of the high-pressure simulation module and the outlet pipeline of the signal transmission module.

15. A multi-condition simulation test method for downhole instruments and tools, characterized in that: The test method is implemented by the downhole instrument tool multi-condition simulation test system according to any one of claims 1 to 14, and the test method comprises the steps of: Set various test parameters for testing downhole instruments and tools; Adjust the corresponding well depth simulation length, vibration simulation frequency and amplitude, drilling simulation thrust, drilling simulation rotation speed, high temperature simulation temperature and high pressure simulation circulation pressure in the test system; Make the circulating fluid circulate in the test system to conduct functionality and reliability tests on downhole instruments; Collect and record the flow and pressure data on each pipeline during the test; Change the test parameters, repeat the test multiple times, and record the test data.

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