Testing device and method for testing performance of vibration well cementation type variable-diameter rigid centralizer

Abstract

The invention belongs to the field of oil and gas well engineering, and particularly relates to a testing device and method for testing the performance of a vibration well cementation type variable-diameter rigid centralizer. According to the testing device for testing the performance of the vibration well cementation type variable-diameter rigid centralizer, a double-axis acceleration sensor is used for being installed on a centralizing piece of the variable-diameter rigid centralizer, and a pull pressure sensor is installed in a simulation downhole mechanism; the air pump is connected with the dry cement storage box and used for blowing dry cement in the dry cement storage box into the cement slurry box. The first hydraulic pump is connected with the water tank and used for pumping water in the water tank into the cement paste tank. A stirring structure is arranged in the cement slurry box, and the cement slurry box is connected with the underground simulation mechanism through a cement slurry pump. According to the testing device, the performance of the variable-diameter rigid centralizer in the well cementation operation can be detected, and guidance and reference are provided for design, manufacturing and use of the variable-diameter rigid centralizer.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas well engineering, and specifically relates to a test device and method for testing the performance of a vibratory cementing type variable diameter rigid centralizer. Background Technology

[0002] In the cementing process of oil and gas wells, the use of casing centralizers ensures the centering of the casing and improves cementing quality. RFID technology is also being applied more and more widely in oil and gas wells. Furthermore, the theory of vibration cementing technology is becoming increasingly mature. Traditional casing centralizers have a relatively singular function, and with the development of cementing technology…

[0003] Chinese Patent Application Publication No. CN118008163A discloses a vibratory cementing type variable diameter rigid centralizer. The variable diameter rigid centralizer can store energy during the casing running process and release the vibration energy when the cement slurry is waiting to set, thereby accelerating the hydration of the cement slurry and improving the cementing efficiency.

[0004] The variable-diameter rigid centralizer needs to have its performance verified in actual cementing operations during design, manufacturing, and product quality inspection. This requires the creation of a test device to simulate actual downhole conditions and the establishment of a complete test procedure, which is an urgent problem to be solved.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention proposes a test device and method for testing the performance of a vibratory cementing variable diameter rigid centralizer. The test device of this invention can detect the performance of the variable diameter rigid centralizer in cementing operations and provide guidance and reference for the design, manufacture and use of the variable diameter rigid centralizer.

[0007] This invention includes the following technical solutions:

[0008] The first aspect of the present invention provides a test apparatus for testing the performance of a vibratory cementing type variable diameter rigid centralizer, comprising a simulated downhole mechanism, a cement slurry mechanism for injecting cement slurry into the simulated downhole mechanism, and a drilling fluid mechanism for injecting drilling fluid into the simulated downhole mechanism, and further comprising a biaxial acceleration sensor and a tensile and compressive force sensor, wherein the cement slurry mechanism comprises a dry cement storage tank, a water tank, a cement slurry tank, a cement slurry pump, an air pump, and a first hydraulic pump;

[0009] The dual-axis accelerometer is used to be installed on the centralizing plate of the variable-diameter rigid centralizer, and the tension and compression sensors are installed inside the simulated downhole mechanism;

[0010] The air pump is connected to the dry cement storage tank and is used to blow the dry cement in the dry cement storage tank into the cement slurry tank; the first hydraulic pump is connected to the water tank and is used to pump the water in the water tank into the cement slurry tank.

[0011] The cement slurry tank is equipped with a stirring structure, and the cement slurry tank is connected to the simulated downhole mechanism via a cement slurry pump.

[0012] Furthermore, the simulated downhole mechanism includes a simulated wellbore, a simulated casing, a temperature sensor, and a heating resistor. The simulated casing is installed inside the simulated wellbore, and the temperature sensor and heating resistor are installed on the simulated wellbore.

[0013] Furthermore, the drilling fluid mechanism includes a second hydraulic pump and a hopper, the simulated downhole mechanism is connected to the hopper, and the hopper is connected to the water tank via the second hydraulic pump.

[0014] Furthermore, the hopper includes a first inlet and a second inlet, the first inlet being used to inject drilling fluid into the simulated downhole mechanism, and the second inlet being used to inject cement slurry into the simulated downhole mechanism.

[0015] Furthermore, it also includes a frame, within which the simulated downhole mechanism is housed.

[0016] A second aspect of the present invention provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer, comprising the test apparatus described above, the test method comprising the following steps:

[0017] S100: The variable-diameter rigid centralizer is installed inside the simulated downhole mechanism;

[0018] S200: Heating the simulated downhole mechanism;

[0019] S300: Drilling fluid containing an RFID1 beacon chip is injected into the simulated downhole mechanism via the drilling fluid mechanism;

[0020] S400: Obtain the pressure value detected by the tension and compression sensors. When the detected pressure value no longer changes, it indicates that the variable diameter rigid centralizer has been fully deployed.

[0021] 7. The test method for a variable diameter rigid centralizer according to claim 7, characterized in that the test method further includes the following steps:

[0022] S500: Acquire the axial vibration signal from the dual-axis accelerometer and determine the straightening effect of the variable-diameter rigid straightener based on the acquired axial vibration signal.

[0023] Furthermore, the test method also includes the following steps:

[0024] S500: Expel drilling fluid from the simulated downhole mechanism;

[0025] S600: Cement slurry containing an RFID1 beacon chip is injected into the simulated downhole mechanism through the cement slurry mechanism to obtain the pressure value of the tension and compression sensor;

[0026] S700: Acquire the radial vibration signal from the dual-axis accelerometer and determine the signal transmission effect between the RFID2 beacon chip and the variable-diameter rigid centralizer based on the radial vibration signal.

[0027] A third aspect of the present invention provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer, comprising the test apparatus described above, the test method comprising the following steps:

[0028] The variable-diameter rigid centralizer is installed inside the simulated downhole mechanism;

[0029] The simulated downhole mechanism is heated to a preset temperature;

[0030] At the first preset time, drilling fluid containing an RFID1 beacon chip is injected into the simulated downhole mechanism through the drilling fluid mechanism;

[0031] According to the second preset time, cement slurry containing RFID2 beacon chips is injected into the simulated downhole mechanism through the cement slurry mechanism to obtain the first solidification time of the cement slurry;

[0032] Clean the simulated downhole mechanism;

[0033] Drilling fluid is injected into the simulated downhole mechanism via the drilling fluid mechanism at the first preset time.

[0034] According to the second preset time, cement slurry is injected into the simulated downhole mechanism through the cement slurry mechanism to obtain the second solidification time of the cement slurry.

[0035] The energy release performance of the variable diameter rigid centralizer is determined by the first and second solidification times.

[0036] A fourth aspect of the present invention provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer, comprising the test apparatus described above, the test method comprising the following steps:

[0037] A100: The variable-diameter rigid centralizer is installed inside the simulated downhole mechanism;

[0038] A200: Heat the simulated downhole mechanism to a preset temperature;

[0039] A300: Drilling fluid containing an RFID1 beacon chip is injected into the simulated downhole mechanism through the drilling fluid mechanism. When the pressure value detected by the tension and pressure sensor no longer changes, it indicates that the variable diameter rigid centralizer has been fully deployed.

[0040] A400: Cement slurry containing an RFID2 beacon chip is injected into the simulated downhole mechanism through the cement slurry mechanism to obtain the axial vibration signal of the dual-axis accelerometer and obtain the signal waveform through the vibration signal;

[0041] A500: Clean the simulated downhole mechanism, repeat steps A200-A400 until the signal waveform disappears; the preset heating temperature corresponding to the disappearance of the signal waveform is the optimal temperature for stable operation of the motor of the variable diameter rigid centralizer.

[0042] During the repetition of steps A200-A400, the preset heating temperature increases sequentially.

[0043] By adopting the above technical solution, the present invention has the following advantages:

[0044] 1. The test apparatus of the present invention can test the performance of variable diameter rigid centralizers in cementing operations and provide guidance and reference for the design, manufacture and use of variable diameter rigid centralizers.

[0045] 2. The hopper of the present invention includes a first feed inlet and a second feed inlet, which can avoid mutual interference between the RFID1 beacon chip and the RFID2 beacon chip and improve the accuracy of the test.

[0046] 3. The test method of the present invention can obtain the performance of the variable diameter rigid centralizer, which is beneficial to the manufacture and use of the variable diameter rigid centralizer.

[0047] 4. The test device of the present invention can better simulate the process of vibration generated by the deployment of the centralizer plate and the release of stored energy in the downhole centralizer, and has the advantage of high test accuracy.

[0048] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the structure of a test device for testing the performance of a vibratory cementing type variable diameter rigid centralizer, as described in an embodiment of the present invention. Figure 1 ;

[0051] Figure 2 This is a schematic diagram of the structure of a test device for testing the performance of a vibratory cementing type variable diameter rigid centralizer, as described in an embodiment of the present invention. Figure 2 ;

[0052] Figure 3 This is a schematic diagram of the simulated downhole mechanism in an embodiment of the present invention. Figure 1 ;

[0053] Figure 4 This is a schematic diagram of the simulated downhole mechanism in an embodiment of the present invention. Figure 2 ;

[0054] Figure 5 This is a schematic diagram of the simulated downhole mechanism in an embodiment of the present invention. Figure 3 ;

[0055] Figure 6 This is a schematic diagram of the frame structure in an embodiment of the present invention;

[0056] Figure 7 This is a schematic diagram of the connection structure of the tension and compression sensors in an embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the connection structure of the dual-axis accelerometer in an embodiment of the present invention;

[0058] Figure 9 This is a schematic diagram of the connection structure between the simulated downhole mechanism and the frame in an embodiment of the present invention;

[0059] Figure 10 for Figure 9 A schematic diagram of a partial structure;

[0060] In the diagram: 10-Simulated downhole mechanism, 11-Simulated wellbore, 111-Second slider, 12-Simulated casing, 13-Temperature sensor, 14-Heating resistor, 20-Cement slurry mechanism, 21-Dry cement storage tank, 22-Water tank, 23-Cement slurry tank, 24-Cement slurry pump, 25-Air pump, 26-First hydraulic pump, 30-Drilling fluid mechanism, 31-Second hydraulic pump, 32-Hopper, 321-First feed inlet, 322-Second feed inlet, 40-Dual-axis accelerometer, 50-Tension and compression sensor, 60-Frame, 61-First casing fixing buckle, 62-Second casing fixing buckle, 63-Moving guide rod, 631-First slider, 64-First chute, 70-Variable diameter rigid centralizer. Detailed Implementation

[0061] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] This embodiment provides a test apparatus for testing the performance of a vibratory cementing type variable diameter rigid centralizer 70, such as... Figure 1 As shown, it includes a simulated downhole mechanism 10, a cement slurry mechanism 20 for injecting cement slurry into the simulated downhole mechanism 10, and a drilling fluid mechanism 30 for injecting drilling fluid into the simulated downhole mechanism 10. It also includes a dual-axis acceleration sensor 40 and a tension / compression sensor 50.

[0064] like Figure 3 , Figure 4 , Figure 5 As shown, the simulated downhole mechanism 10 includes a simulated wellbore 11, a simulated casing 12, a temperature sensor 13, and a heating resistor 14. The simulated casing 12 is installed inside the simulated wellbore 11, and the temperature sensor 13 and the heating resistor 14 are installed on the simulated wellbore 11.

[0065] The simulated wellbore 11 includes an inner cylinder and an outer cylinder, with the outer cylinder located outside the inner cylinder. The heating resistor 14 is located between the inner and outer cylinders. The simulated wellbore 11 is heated by the heating resistor 14 to simulate the downhole temperature. The temperature sensor 13 can control the heating temperature. The temperature sensor 13 is preferably located on the inner cylinder and is connected to a terminal, which can be a computer.

[0066] The simulated well shaft 11 is equipped with a drain outlet, which is connected to a valve.

[0067] like Figure 1 As shown, the cement slurry mechanism 20 includes a dry cement storage tank 21, a water tank 22, a cement slurry tank 23, a cement slurry pump 24, an air pump 25, and a first hydraulic pump 26; the biaxial acceleration sensor 40 is used to be installed on the straightening plate of the variable diameter rigid straightener 70, as shown. Figure 3As shown, the tension and pressure sensor 50 is installed inside the simulated downhole mechanism 10. The position of the tension and pressure sensor 50 needs to ensure that the force of the centralizer unfolding can act on it. Therefore, when the variable diameter rigid centralizer 70 is sleeved on the simulated casing 12, its position needs to be adjusted. Preferably, the tension and pressure sensor 50 can be set on the centralizer, and the tension and pressure sensor 50 is located on the largest circle after the centralizer unfolds, which improves the test efficiency.

[0068] The air pump 25 is connected to the dry cement storage tank 21 and is used to blow the dry cement in the dry cement storage tank 21 into the cement slurry tank 23; the first hydraulic pump 26 is connected to the water tank 22 and is used to pump the water in the water tank 22 into the cement slurry tank 23; Figure 2 As shown, the cement slurry tank 23 is equipped with a stirring structure, and the cement slurry tank 23 is connected to the simulated downhole mechanism 10 through the cement slurry pump 24.

[0069] The dry cement storage tank 21 and water tank 22 in the cement slurry mechanism 20 can be prepared on the spot when cement slurry is needed, which can avoid the impact of pre-prepared cement slurry on the setting time of cement slurry.

[0070] The drilling fluid mechanism 30 includes a second hydraulic pump 31 and a hopper 32. The simulated downhole mechanism 10 is connected to the hopper 32, and the hopper 32 is connected to the water tank 22 through the second hydraulic pump 31.

[0071] Here, the drilling fluid unit 30 does not have a separate drilling fluid tank; instead, it shares a water tank 22 with the cement slurry unit 20. This not only reduces the number of devices used and lowers costs but also allows for on-site preparation of cement slurry. Of course, the drilling fluid unit 30 could have its own separate drilling fluid tank.

[0072] Among them, such as Figure 7 As shown, the tension / compression sensor 50 is connected to a signal amplifier, the signal amplifier is connected to a data acquisition unit, and the data acquisition unit is connected to a computer. It should be noted that all structures in the diagram are wired connections; however, these connections can also be wireless, via network communication. Figure 8 The dual-axis accelerometer 40 is connected to a signal conditioner, which is connected to a data acquisition card, which is connected to a computer. It should be noted that all the structures in the figure are wired, but the connection between the structures can also be wireless, through network communication.

[0073] Among them, the tension / compression sensor 50 (DYMH-106), signal amplifier (SRD-1004), tension / compression sensor 50 data acquisition unit (USB-3123), dual-axis accelerometer 40 (square control 500mv / g (10g)), signal conditioner (SRD-1104-I EPE), dual-axis accelerometer 40 data acquisition card (USB-3123), etc. can all be purchased and used directly.

[0074] Because RFID1 beacon chips need to be placed in the drilling fluid and RFID2 beacon chips need to be placed in the cement slurry respectively, further, such as Figure 1 As shown, the hopper 32 includes a first inlet 321 and a second inlet 322. The first inlet 321 is used to inject drilling fluid into the simulated downhole mechanism 10, and the second inlet 322 is used to inject cement slurry into the simulated downhole mechanism 10. This avoids interference between the deployment of RFID1 beacon chip and RFID2 beacon chip, improving the accuracy of the test.

[0075] Furthermore, such as Figure 1 , Figure 6 As shown, it also includes a frame 60, within which the simulated downhole mechanism 10 is installed. The upper end of the frame 60 is fixedly connected to the simulated sleeve 12, and the top end of the simulated sleeve 12 is fixedly connected to the hopper 32. Before the test, a variable diameter rigid stabilizer 70 is installed in the test device. Specifically, the variable diameter rigid stabilizer 70 is fitted onto the simulated sleeve 12, and then the simulated well shaft 11 is fitted over the simulated sleeve 12 and the variable diameter rigid stabilizer 70. During the actual use of the variable diameter rigid stabilizer 70 for straightening, the simulated sleeve 12 will move and be straightened. In the above structure, the simulated sleeve 12 is fixed, so the movement of its straightening process is transferred to the simulated well shaft 11. Therefore, the simulated well shaft 11 is movably installed inside the frame 60. Since the simulated well shaft 11 needs to be disassembled and moved, a connection hole is provided at the bottom of the frame 60. The simulated well shaft 11 is disassembled and fitted over the simulated sleeve 12 and the variable diameter rigid stabilizer 70 through this connection hole. This structure enables performance testing of the variable diameter rigid centralizer 70, and also allows for testing with different variable diameter rigid centralizers 70.

[0076] The simulated wellbore 11 is movable, which means it can be independent of the support or other structures. It only needs to be fitted over the simulated casing 12 and the variable-diameter rigid stabilizer 70, and it must not move vertically. Figure 1As shown, after the test device is placed, the simulated wellbore 11 does not move up and down under gravity. During the straightening process of the variable diameter rigid stabilizer 70, its straightening plates unfold and compress the simulated wellbore 11 to move radially. In this case, uneven force may cause the simulated wellbore 11 to tilt, resulting in poor straightening effect and poor test accuracy. Therefore, the movement of the simulated wellbore 11 is restricted, specifically:

[0077] like Figure 9 , Figure 10 As shown, the frame 60 is provided with a first sleeve fixing buckle 61, a second sleeve fixing buckle 62, and a moving guide rod 63; the first sleeve fixing buckle 61 and the second sleeve fixing buckle 62 are fixed to the simulated sleeve 12 by bolt pre-tightening. After the simulated sleeve 12 is fixed, the double-mouth hopper 32 is engaged with the simulated sleeve 12; the middle structural part of the moving guide rod 63 is a large ring, and the simulated sleeve 12 is set in the large ring.

[0078] The movable guide rod 63 is provided with first sliders 631 at both ends, and a corresponding first groove 64 is provided on the frame 60 to cooperate with the first sliders 631. The movable guide rod 63 can slide along the frame 60 through the cooperation of the first sliders 631 and the first groove 64. The upper end face of the simulated well barrel 11 is provided with a second slider 111 structure, and a corresponding second groove (not shown in the figure, but its specific position can be known by those skilled in the art based on the description of this embodiment) is provided on the movable guide rod 63. The simulated well barrel 11 can slide along the movable guide rod 63 through the cooperation of the first sliders 631 and the second slider 111. During the straightening process, the simulated well barrel 11 can move in four directions.

[0079] The performance of the variable diameter rigid centralizer 70 includes the signal transmission effect between the beacon chip (including RFID1 beacon chip and RFID2 beacon chip) and the variable diameter rigid centralizer 70, the effect of the energy release of the variable diameter rigid centralizer 70 on the cement slurry solidification effect, the centralizer plate unfolding effect, the maximum operating temperature of the motor of the variable diameter rigid centralizer 70, the centralizing effect, etc.

[0080] This embodiment also provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer 70, including the test apparatus described above, and the test method includes the following steps:

[0081] S100: The variable-diameter rigid centralizer 70 is installed inside the simulated downhole mechanism 10;

[0082] S200: Heating the simulated downhole mechanism 10;

[0083] S300: Drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism 10 via the drilling fluid mechanism 30;

[0084] S400: Obtain the pressure value detected by the tension / compression sensor 50. When the detected pressure value no longer changes, it indicates that the variable diameter rigid centralizer 70 has been fully deployed.

[0085] The pressure value that no longer changes is compared with the designed pressure value. If they are equal, it indicates that the variable diameter centralizer is effective. If it is smaller than the designed pressure value, it indicates that the deployment effect is poor.

[0086] This embodiment also provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer 70, including the test apparatus described above, and the test method includes the following steps:

[0087] S100: The variable-diameter rigid centralizer 70 is installed inside the simulated downhole mechanism 10;

[0088] S200: Heating the simulated downhole mechanism 10;

[0089] S300: Drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism 10 via the drilling fluid mechanism 30;

[0090] S400: Obtain the pressure value detected by the tension / compression sensor 50. When the detected pressure value no longer changes, it indicates that the variable diameter rigid stabilizer 70 has been fully deployed.

[0091] S500: Acquire the axial vibration signal from the dual-axis accelerometer 40, and determine the straightening effect of the variable-diameter rigid centralizer 70 based on the acquired axial vibration signal.

[0092] The waveform of the vibration can be obtained from the vibration signal. If the fluctuation of the waveform is small, it means that the variable diameter rigid centralizer 70 can ensure that the simulated sleeve 12 is stably centered.

[0093] This embodiment also provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer 70, including the test apparatus described above, and the test method includes the following steps:

[0094] S100: The variable-diameter rigid centralizer 70 is installed inside the simulated downhole mechanism 10;

[0095] S200: Heating the simulated downhole mechanism 10;

[0096] S300: Drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism 10 via the drilling fluid mechanism 30;

[0097] S400: Obtain the pressure value detected by the tension / compression sensor 50. When the detected pressure value no longer changes, it indicates that the variable diameter rigid stabilizer 70 has been fully deployed.

[0098] S500: Drilling fluid is removed from the simulated downhole mechanism 10;

[0099] S600: Cement slurry containing the RFID1 beacon chip is injected into the simulated downhole mechanism 10 through the cement slurry mechanism 20 to obtain the pressure value of the tension and compression sensor 50; if the pressure value of the pressure sensor increases and remains stable, it indicates that the straightening plate is successfully deployed under the information transmission of the RFID beacon chip 1, and the information transmission effect is good.

[0100] S700: Acquire the radial vibration signal from the dual-axis accelerometer 40, and determine the signal transmission effect between the RFID2 beacon chip and the variable-diameter rigid centralizer 70 based on the radial vibration signal. If a radial signal waveform can be obtained through the radial signal, and if the radial waveform has a certain peak value and a decreasing trend, it indicates that the vibration energy is released smoothly, and the information transmission effect of the RFID2 beacon chip is good.

[0101] This embodiment also provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer 70, including the test apparatus described above, and the test method includes the following steps:

[0102] The variable-diameter rigid centralizer 70 is installed inside the simulated downhole mechanism 10;

[0103] The simulated downhole mechanism 10 is heated to a preset temperature;

[0104] At the first preset time, drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism 10 through the drilling fluid mechanism 30;

[0105] According to the second preset time, the cement slurry containing the RFID2 beacon chip is injected into the simulated downhole mechanism 10 through the cement slurry mechanism 20 to obtain the first solidification time of the cement slurry;

[0106] Clean the simulated downhole mechanism 10 device;

[0107] According to the first preset time, drilling fluid is injected into the simulated downhole mechanism 10 through the drilling fluid mechanism 30;

[0108] According to the second preset time, cement slurry is injected into the simulated downhole mechanism 10 through the cement slurry mechanism 20 to obtain the second solidification time of the cement slurry.

[0109] The energy release performance of the variable diameter rigid centralizer 70 is determined by the first and second solidification times.

[0110] If the first setting time is less than the second setting time, it indicates that the vibration of the variable diameter rigid centralizer 70 can promote cement slurry solidification, thereby improving the cementing quality.

[0111] This embodiment also provides a test method for the performance of a vibratory cementing type variable diameter rigid centralizer 70, including the test apparatus described above, and the test method includes the following steps:

[0112] A100: The variable-diameter rigid centralizer 70 is installed inside the simulated downhole mechanism 10;

[0113] A200: Heat the simulated downhole mechanism 10 to the preset temperature;

[0114] A300: Drilling fluid containing an RFID1 beacon chip is injected into the simulated downhole mechanism 10 through the drilling fluid mechanism 30. When the pressure value detected by the tension and pressure sensor 50 no longer changes, it indicates that the variable diameter rigid centralizer 70 has been fully deployed.

[0115] A400: Cement slurry containing an RFID2 beacon chip is injected into the simulated downhole mechanism 10 through the cement slurry mechanism 20, and the axial vibration signal of the dual-axis accelerometer 40 is obtained. The signal waveform is obtained through the vibration signal.

[0116] A500: Clean the simulated downhole mechanism 10, repeat steps A200-A400 until the signal waveform disappears; the preset heating temperature corresponding to the disappearance of the signal waveform is the limit temperature for stable operation of the motor of the variable diameter rigid centralizer 70.

[0117] During the repetition of steps A200-A400, the preset heating temperature increases sequentially.

[0118] During the use of the variable diameter rigid centralizer 70, the temperature of its operating environment should be avoided to be greater than or equal to the limit temperature.

[0119] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0120] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of multiple components or the interaction between multiple components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0121] In the description of this invention, it should be understood that all terms used to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this invention.

[0122] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for testing performance of a vibrating cementing type variable diameter rigid centralizer, comprising a simulated downhole mechanism (10), a cement slurry mechanism (20) for injecting a cement slurry into the simulated downhole mechanism (10), and a drilling fluid mechanism (30) for injecting a drilling fluid into the simulated downhole mechanism (10), characterized in that, The cement slurry mechanism (20) comprises a dry cement storage tank (21), a water tank (22), a cement slurry tank (23), a cement slurry pump (24), an air pump (25) and a first hydraulic pump (26); The biaxial acceleration sensor (40) is arranged on the centralizing piece of the variable-diameter rigid centralizer, and the tensile and compressive force sensor (50) is arranged in the simulated downhole mechanism (10); The air pump (25) is connected to the dry cement storage tank (21) and is used to blow the dry cement in the dry cement storage tank (21) into the cement slurry tank (23); the first hydraulic pump (26) is connected to the water tank (22) and is used to pump the water in the water tank (22) into the cement slurry tank (23); The cement slurry tank (23) is provided with a stirring structure, and the cement slurry tank (23) is connected to the simulated downhole mechanism (10) through the cement slurry pump (24).

2. The test device for testing the performance of a vibration cementing variable diameter rigid centralizer according to claim 1, characterized in that, The simulated downhole mechanism (10) comprises a simulated wellbore (11), a simulated casing (12), a temperature sensor (13) and a heating resistor (14), and the simulated casing (12) is arranged in the simulated wellbore (11), and the temperature sensor (13) and the heating resistor (14) are arranged on the simulated wellbore (11).

3. The test device for testing the performance of a vibration cementing variable-diameter rigid centralizer according to claim 1 or 2, characterized in that, The drilling fluid mechanism (30) comprises a second hydraulic pump (31) and a hopper (32), the simulated downhole mechanism (10) is connected to the hopper (32), and the hopper (32) is connected to the water tank (22) through the second hydraulic pump (31).

4. The test device for testing the performance of a vibration cementing variable diameter rigid centralizer according to claim 3, characterized in that, The hopper (32) comprises a first feeding port (321) and a second feeding port (322), the first feeding port (321) is used to inject drilling fluid into the simulated downhole mechanism (10), and the second feeding port (322) is used to inject cement slurry into the simulated downhole mechanism (10).

5. The test device for testing the performance of a vibration cementing variable diameter rigid centralizer according to claim 1, characterized in that, The frame body (60) is provided with the simulated downhole mechanism (10).

6. A method for testing the performance of a vibrasie cementing variable diameter rigid centralizer, characterized in that, The test device comprises the test device according to any one of claims 1-5, and the test method comprises the following steps: S100: arranging the variable-diameter rigid centralizer in the simulated downhole mechanism (10); S200: heating the simulated downhole mechanism (10); S300: injecting drilling fluid containing an RFID1 beacon chip into the simulated downhole mechanism (10) through the drilling fluid mechanism (30); S400: obtaining a pressure value detected by the tensile and compressive force sensor (50), and when the detected pressure value no longer changes, it indicates that the variable-diameter rigid centralizer has been completely expanded.

7. The test method for the performance of a vibratory cementing type variable diameter rigid centralizer according to claim 6, characterized in that, The test method further comprises the following steps: S500: obtaining an axial vibration signal of the biaxial acceleration sensor (40), and judging the centralizing effect of the variable-diameter rigid centralizer according to the obtained axial vibration signal.

8. The test method for the performance of a vibratory cementing type variable diameter rigid centralizer according to claim 7, characterized in that, The test method further comprises the following steps: S500: removing the drilling fluid in the simulated downhole mechanism (10); S600: injecting the cement slurry containing the RFID1 beacon chip into the simulated downhole mechanism (10) through the cement slurry mechanism (20) to obtain the pressure value of the pull pressure sensor (50); S700: obtaining the radial vibration signal of the dual-axis acceleration sensor (40) and judging the signal transmission effect of the RFID2 beacon chip and the variable-diameter rigid centralizer through the radial vibration signal.

9. A method for testing the performance of a vibrasie cementing variable diameter rigid centralizer, characterized in that, The test method comprises the following steps: The variable-diameter rigid centralizer is arranged in the simulated downhole mechanism (10); The simulated downhole mechanism (10) is heated to a preset temperature; The drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism (10) through the drilling fluid mechanism (30) at a first preset time; The cement slurry containing the RFID2 beacon chip is injected into the simulated downhole mechanism (10) through the cement slurry mechanism (20) at a second preset time to obtain the first setting time of the cement slurry; The simulated downhole mechanism (10) is cleaned; The drilling fluid is injected into the simulated downhole mechanism (10) through the drilling fluid mechanism (30) at a first preset time; The cement slurry is injected into the simulated downhole mechanism (10) through the cement slurry mechanism (20) at a second preset time to obtain the second setting time of the cement slurry; The energy release performance of the variable-diameter rigid centralizer (70) is judged according to the obtained first setting time and second setting time.

10. A method of testing the performance of a vibrasie cementing variable gauge rigid centralizer, characterized in that, The test method comprises the following steps: A100: The variable-diameter rigid centralizer is arranged in the simulated downhole mechanism (10); A200: The simulated downhole mechanism (10) is heated to a preset temperature; A300: The drilling fluid containing the RFID1 beacon chip is injected into the simulated downhole mechanism (10) through the drilling fluid mechanism (30), and when the pressure value detected by the pull pressure sensor (50) no longer changes, it indicates that the variable-diameter rigid centralizer has been completely deployed; A400: The cement slurry containing the RFID2 beacon chip is injected into the simulated downhole mechanism (10) through the cement slurry mechanism (20) to obtain the axial vibration signal of the dual-axis acceleration sensor (40), and the signal waveform is obtained through the vibration signal; A500: The simulated downhole mechanism (10) is cleaned, and steps A200-A400 are repeated until the signal waveform disappears; the preset temperature of heating corresponding to the disappearance of the signal waveform is the optimal temperature for stable operation of the motor of the variable-diameter rigid centralizer (70); Wherein, when repeating steps A200-A400, the preset temperature of heating is increased in turn.

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