CN110646174A - Testing device and testing method for performance parameters of auxiliary drilling tool - Google Patents
Testing device and testing method for performance parameters of auxiliary drilling tool Download PDFInfo
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- CN110646174A CN110646174A CN201810589316.7A CN201810589316A CN110646174A CN 110646174 A CN110646174 A CN 110646174A CN 201810589316 A CN201810589316 A CN 201810589316A CN 110646174 A CN110646174 A CN 110646174A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
According to the present invention, there is provided a testing apparatus for performance parameters of an auxiliary drilling tool, comprising: a pressure measurement mechanism connected at a first end of the auxiliary drilling tool, comprising: the system comprises a simulation pressure generating unit used for simulating and generating drilling fluid weight on bit, a first force sensor and a first joint used for connecting the auxiliary drilling tool. And an impact force measuring mechanism connected at the second end of the auxiliary drill, comprising: the second joint is used for being connected with the auxiliary drilling tool, and the torque sensor, the second force sensor and the sensor anti-rotation shaft are connected with the second joint. Wherein the first joint and the second joint can form a closed loop with an auxiliary drilling tool so as to test the auxiliary drilling tool. The invention also provides a method for testing the performance parameters of the auxiliary drilling tool.
Description
Technical Field
The invention belongs to the technical field of petroleum industry machinery, and particularly relates to a performance parameter testing device for an auxiliary drilling tool. The invention also relates to a method for testing the performance parameters of the auxiliary drilling tool.
Background
With the continuous development of oil drilling technology, many drilling tools with different functions have appeared to meet the demands in the drilling engineering. With the rapid development of science and technology, the performance of the well drilling tool in the prior art is greatly improved.
However, under some special conditions, some problems still exist. For example, when the drill bit is constructed in a soft-hard staggered stratum or a hard stratum, the stratum has large lithological change or large strength, and the soft-hard staggered stratum easily induces the vibration of a downhole drilling tool in the drilling process, so that the drill bit is in a dynamic unstable working state for a long time. The instability of the working state of the drill bit can cause the underground drill string to be in the coupling state of axial vibration, transverse vibration and circumferential vibration, and the three underground vibration modes are mainly represented as tripping, whirling and stick-slip respectively. The vibration of the drill bit can not only reduce the rock breaking efficiency of the drill bit, but also cause the prior damage of the teeth or cutting teeth of the drill bit and the fatigue damage of a drilling tool, thereby further causing a series of problems of slow mechanical drilling speed, less drill bit footage, short service life of the drill bit, prior failure of the drilling tool, underground falling objects and the like which influence the drilling period and the drilling cost.
Therefore, the pressurizing, damping and stable-torsional-impact drilling speed-up tool is used in the drilling process, the effect of reducing the impact of the underground axial vibration on the drill bit can be achieved, meanwhile, the designed bit pressure can be applied to the drill bit, and therefore the impact force with the axial circumferential direction and the composite direction, which changes at high frequency, is provided for the drill bit. The rotary motion when exceeding the set torque is converted into linear motion, the drill string of the drill bit is prevented from stalling, and the problems that the drill bit is stuck and jumped in a hard formation and an interlayer, is sticky and slippery, stalls, is slow in mechanical drilling speed and the like are solved.
The pressurizing, damping, stable-torsion drilling and accelerating tool in the prior art mainly comprises three parts, namely an impact energy generating mechanism, an impact energy distribution mechanism and a damping and stable-torsion mechanism. The impact energy generating mechanism is used for converting the energy of the drilling fluid to generate axial impact energy. The impact energy distribution mechanism redistributes the axial impact energy into axial impact energy and circumferential impact energy. The damping and torsion stabilizing mechanism is used for absorbing and storing excessive torque in the drilling process and reducing vibration. The impact energy generating mechanism utilizes a plurality of groups of turbines to generate continuous high-torque rotating power, and the change of the flow area between the dynamic valve disc and the static valve disc generates periodic throttling pressure difference to generate axial oscillation so as to realize circumferential impact. Radial centralizing bearings are used for radial support centralization of energy generating units, the bearings need to withstand slurry scouring, while bearing rotation needs to be as smooth as possible to mitigate frictional kinetic energy losses. Thrust bearings primarily carry axial loads. The impact energy distribution unit is used for converting part of axial impact force generated by the impact energy generation unit into circumferential impact, and a mechanism of a screw pair is adopted to realize the function. The damping torque stabilizing mechanism consists of a disc spring and a screw pair, when stall occurs, a spindle of the screw pair rotates under the action of large torque and differential speed, the disc spring is compressed, and at the moment, a lower drilling tool can be lifted for a certain distance to release partial reactive torque. Therefore, the performance parameters of the pressurizing, damping, stable-torque-impact drilling and accelerating tool are tested, and the method is particularly important for improving the effect of the drilling tool.
However, in the prior art, no existing parameter testing device and method for the impact force of the pressurization, damping, torsion-stabilized drilling and acceleration tool exist.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to a testing apparatus for performance parameters of an auxiliary drilling tool, which is capable of simulating an applied weight-on-bit of a downhole drilling environment and measuring the magnitude of an impact force of the auxiliary drilling tool to be tested by a sensor. Meanwhile, the measuring device can continuously run for a long time, so that the service life of the auxiliary drilling tool is tested. In addition, the testing device has the advantages of simple structure, low processing and manufacturing cost, easiness in installation, simplicity and convenience in operation and capability of ensuring the accuracy of the testing structure.
The invention also provides a method for testing the performance parameters of the auxiliary drilling tool, which is used for testing the performance parameters of the auxiliary drilling tool by using the testing device for the performance parameters of the auxiliary drilling tool. The test method is simple and easy to operate, the accuracy of the test result is high, and the test efficiency of the simulation test can be improved.
According to a first aspect of the present invention, there is provided a testing apparatus for assisting in the testing of performance parameters of a drilling tool, comprising: a pressure measurement mechanism connected at a first end of the auxiliary drilling tool, the pressure measurement mechanism comprising: a simulated pressure generating unit for simulating and generating the bit pressure; a first force sensor for measuring the weight-on-bit reaction force; and a first joint for connecting the auxiliary drilling tool; and an impact force measuring mechanism connected at the second end of the auxiliary drilling tool, the impact force measuring mechanism comprising: a second joint for connecting the auxiliary drilling tool; the torque sensor is used for measuring circumferential impact force generated by the auxiliary drilling tool; the second force sensor is used for measuring the axial impact force generated by the auxiliary drilling tool; and a sensor rotation preventing shaft for preventing rotation of the torque sensor and the second force sensor; the first joint and the second joint are respectively provided with a first liquid return joint and a second liquid return joint, and the first liquid return joint and the second liquid return joint are both connected with a liquid storage tank so as to form a closed loop between the testing device and the auxiliary drilling tool, so that the auxiliary drilling tool is tested.
In a preferred embodiment, the analog pressure generating unit comprises a hydraulic cylinder, both ends of which are configured as openings, in which a piston is mounted in fixed connection with the first force sensor.
In a preferred embodiment, a push cylinder is fixedly connected to the hydraulic cylinder, and a push rod for adjusting the axial position of the push cylinder is arranged in the push cylinder and is in contact with the piston.
In a preferred embodiment, the piston is provided with a radial flange and forms a dynamic seal with the inner wall of the hydraulic cylinder, so that an annular first cavity is formed between the piston and the hydraulic cylinder, and a first hole for communicating with the atmosphere is formed in the outer wall of the hydraulic cylinder corresponding to the first cavity.
In a preferred embodiment, a plug is arranged between the hydraulic cylinder and the push cylinder, the plug is fixedly connected with the hydraulic cylinder and forms a seal, a dynamic seal is formed between the plug and the push rod, so that an annular second cavity is formed between the plug and the piston and between the hydraulic cylinder and the push rod, and a second hole for connecting a first hydraulic pump is arranged on the outer wall of the hydraulic cylinder, which corresponds to the second cavity.
In a preferred embodiment, a first baffle plate for fixedly connecting with a ground device is arranged on the periphery of the push cylinder and the periphery of the first joint.
In a preferred embodiment, the second fluid return joint is mounted to the second joint by a rotating sealing sleeve, and the rotating sealing sleeve is in sealing connection with the second fluid return joint.
In a preferred embodiment, the torque sensor is connected with the second joint and the second force sensor in a matched mode through a key connection mode.
In a preferred embodiment, a sensor rotation preventing sleeve is fixedly installed on the sensor rotation preventing shaft, and a second baffle plate fixedly connected with a ground device is fixedly installed on the sensor rotation preventing sleeve.
According to a second aspect of the present invention, there is provided a method for testing performance parameters of an auxiliary drilling tool, comprising the steps of:
connecting the first end and the second end of the auxiliary drilling tool with the first joint and the second joint respectively;
adjusting the position of a first baffle of the testing device, and fixing the testing device on a ground device through the first baffle and the second baffle;
connecting a second hole on the hydraulic cylinder with the first hydraulic pump for simulating the bit pressure reaction force of the well bottom on the auxiliary drilling tool, and/or connecting the first liquid return joint with a liquid storage tank through a second hydraulic pump and a pipeline, and directly connecting the second liquid return joint with the liquid storage tank through a pipeline, thereby simulating the flow of drilling liquid under the well; measurements are made by the first force sensor, the second force sensor and the torque sensor.
Drawings
The invention will now be described with reference to the accompanying drawings.
Fig. 1 shows the structure of a testing device for assisting performance parameters of a drilling tool according to the present invention.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
Fig. 1 shows the structure of a testing apparatus 100 for assisting performance parameters of a drilling tool according to the present invention. As shown in fig. 1, the testing apparatus 100 includes a pressure measuring mechanism 110 and an impact force measuring mechanism 120 for connecting to both ends of the auxiliary drilling tool to be tested, respectively. The pressure measuring mechanism 110 is used to connect to the upstream end of the auxiliary drilling tool to be tested, and the impact force measuring mechanism 120 is used to connect to the downstream end of the auxiliary drilling tool to be tested. The testing apparatus 100 is capable of measuring the performance of the auxiliary drilling tool and the parameters of the impact force thereof by installing the pressure measuring mechanism 110 and the impact force measuring mechanism 120 into the auxiliary drilling tool to be tested and by simulating the applied weight on bit of the downhole drilling environment. Therefore, reliable reference is provided for parameter design, material selection and production and processing procedure selection of the auxiliary drilling tool, so that the acceleration performance of the auxiliary drilling tool is enhanced, the working effect of the auxiliary drilling tool is improved, and the drilling efficiency of the drilling tool is effectively improved.
In this application, it is noted that the "auxiliary drilling tool" to be tested is a tool for assisting a downhole drilling tool to enhance the working performance of the drilling tool. The auxiliary drilling tool is a pressurized, shock-absorbing and stable-torque-impulse drilling acceleration tool, for example, see the chinese patent application 201810392282.2 entitled "a downhole auxiliary drilling tool" filed by the same applicant at 2018, 4, 27, which is incorporated herein by reference in its entirety. In addition, the end of the auxiliary drilling device where the drilling fluid enters is defined as the upstream end or the like during the test, and the end of the auxiliary drilling device where the drilling fluid exits is defined as the downstream end or the like.
As shown in fig. 1, the pressure measuring mechanism 110 includes a simulated pressure generating unit 50, and the simulated pressure generating unit 50 is used for simulating the generation of the first axial impact force of the bottom hole on the auxiliary drilling tool. The analog pressure generating unit 50 includes a cylindrical hydraulic cylinder 7, and a bottom surface is provided at a lower end of the hydraulic cylinder 7 and a circular through hole is provided in the bottom surface. A piston 8 is mounted in the hydraulic cylinder 7, and the piston 8 can move axially along the hydraulic cylinder 7. The piston 8 is a cylinder with a diameter equal to the diameter of the circular through hole on the bottom surface of the hydraulic cylinder 7. One end of the piston 8 is configured with a radial flange forming a dynamic seal with the inner wall of the cylinder 7. For example, a seal, such as a greige ring, is mounted between the radial flange of the piston 8 and the outer wall of the cylinder to ensure a seal between the radial flange and the cylinder 7. And the other end of the piston 8 passes through a circular through hole on the bottom surface of the hydraulic cylinder 7, and a seal is formed between the piston 8 and the hydraulic cylinder 7. Thereby, an annular first cavity 81 is formed between the piston 8 and the cylinder 7. A first hole 71 is provided on an outer wall of the hydraulic cylinder 7 corresponding to the first chamber 81 so as to communicate the first chamber 81 with the atmosphere. During the test, the first chamber 81 was filled with air so that the pressure at the lower end of the radial flange of the piston 8 was the same as atmospheric pressure.
According to the invention, the upper end of the hydraulic cylinder 7 is fixedly connected with the push cylinder 2 through the plug 3. An installation groove (not shown) is provided in the outer circumferential surface of the push cylinder 2, and a first baffle 13 is installed in the installation groove. The first baffle 13 is used for being fixedly connected with the ground device, so that the test device 100 can be effectively prevented from rotating. As shown in fig. 1, a push rod 1 is arranged in the axial direction of a push cylinder 2. Threads are processed on the outer surface of the push rod 1 and the inner surface of the upper end of the push cylinder 2, so that threaded connection is formed between the push rod 1 and the inner surface of the upper end of the push cylinder 2, and the lower end surface of the push rod 1 is in contact with the upper end surface of the piston 8. The push rod 1 can adjust the axial position of the push cylinder 2 and the first baffle 13, so that the test device 100 is stably installed with a ground device, and the installation stability of the test device 100 is ensured.
In the present embodiment, the plug 3 is disposed between the push cylinder 2 and the hydraulic cylinder 7. The upper end of the plug 3 is fixedly connected with the push cylinder 2 through thread fit, the lower end of the plug 3 is fixedly connected with the hydraulic cylinder 7 through thread fit, and a sealing element 5 is arranged between the plug 3 and the hydraulic cylinder 7. For example, an O-ring seal may be installed between the plug 3 and the cylinder 7 to seal the plug 3 and the cylinder 7. Meanwhile, the plug 3 is installed on the push rod 1, and dynamic sealing is formed between the plug 3 and the push rod 1. For example, several sets of O-rings 4 are mounted between the plug 3 and the push rod 1. The plug 3 and the piston 8 thus form a second, sealed annular chamber 82 between the cylinder 7 and the ram 1. A second hole 72 is provided on an inner wall of the hydraulic cylinder 7 corresponding to the second chamber 82, and the second hole 72 is used for connecting a first hydraulic pump.
During the test, the second port 72 of the hydraulic cylinder 7 is connected to the first hydraulic pump via a hydraulic line and is pressurized by the first hydraulic pump so that liquid enters and fills the second chamber 82, thereby providing pressure to the upper end face of the piston 8 and pushing the piston 8 to move downward. At this time, the air in the first cavity 71 is discharged from the first hole 71. Thereby, the applied weight-on-bit of the downhole drilling environment is simulated, i.e. the weight-on-bit reaction force generated by the well bottom to the auxiliary drilling tool is simulated. This force remained constant and was present throughout the test.
As shown in FIG. 1, the pressure testing mechanism 110 further includes a first force sensor 9. The first force sensor 9 is used to measure the weight on bit reaction of the simulated downhole weight on bit of the auxiliary tool. The first force sensor 9 is mounted at the lower end of the hydraulic cylinder 7 and is fixedly connected with the piston 8. In one embodiment, an axially inward circular hole is provided in the lower end surface of the piston 8, and the surface of the circular hole is threaded. The first force sensor 9 is fixedly connected to the piston 8 by means of a screw thread.
According to the invention, the pressure measuring means 110 further comprises a first connector 14 for connecting an auxiliary drilling tool. As shown in fig. 1, a first joint is arranged at the downstream end of the first force sensor 9. The first connector 14 is configured as a hollow cylinder, and the lower end of the first connector 14 is provided with a tapered connector, which is threaded for connection with an auxiliary drilling tool. A first through hole 141 is provided in a side wall of the first joint 14, and the first liquid return joint 12 is mounted in the first through hole 141. In one embodiment, the first liquid-returning connector 12 is connected to the first through hole 141 of the first connector 14 by soldering. During operation, the first fluid return connection 12 is connected to a reservoir via a line for providing simulated drilling fluid to the testing device 100. In this embodiment, a slider 10 is fixedly connected between the first force sensor 9 and the first tab 14. In one embodiment, the slider 10 is in a fixed connection with the first force sensor 9 and the first joint by means of a thread, and the slider 10 forms a seal with the first joint 14.
Further, a mounting groove (not shown) in which the first barrier 13 is mounted is processed on an outer side surface of the first joint 14. During installation, the first baffle 13 on the first joint 14 is fixedly connected with the ground device, so that the first joint 14 is prevented from rotating, and the stability of the pressure measuring mechanism 110 is ensured.
According to the invention, the impact force measuring means 120 comprises a second connector 15 for connecting an auxiliary drilling tool. As shown in fig. 1, the upper end of the second connector 15 is also provided with a tapered threaded connector button for connection with an auxiliary drill, and the lower end of the second connector 15 is axially closed. A rotating sealing sleeve 16 configured in a cylindrical shape is fitted over the outer surface of the second joint 15, and a seal 17, for example a gray ring, may be fitted between the second joint 15 and the rotating sealing sleeve 16, so that the second joint 15 forms a seal with the rotating sealing sleeve 16. A fixing nut 18 is provided at the lower end of the rotary sealing sleeve 16 to fix the rotary sealing sleeve 16 in the axial direction. The side wall of the rotary sealing sleeve 16 is provided with a mounting hole, and the side wall of the second joint 15 is provided with a second through hole (not shown), and the mounting hole on the rotary sealing sleeve 16 and the second through hole on the side wall of the second joint 15 are arranged to axially correspond to each other so as to be capable of communicating with each other. In one embodiment, a second liquid return joint 40 is connected to the mounting hole by welding. In operation, the second connector 15 is connected to the reservoir via a second fluid return connection 40, so that the simulated drilling fluid in the auxiliary drilling tool can be returned to the reservoir to form a circulation, thereby simulating the flow of drilling fluid downhole.
As shown in fig. 1, a torque sensor 20 is fixedly connected to a lower end of the second joint 15. In one embodiment, a key groove (not shown) is provided on the inner surface of the lower end of the second joint 15. In which a key 19 is mounted so that the torque sensor 20 is keyed into a mating connection with the second connector 15.
According to the present invention, a second force sensor 30 is fixedly connected to a lower end of the torque sensor 20. A sensor connection head 21 is provided between the torque sensor 20 and the second force sensor 30. In one embodiment, the torque sensor 20 is matingly connected to the sensor connector 21 by a keyed connection and the second force sensor 30 is fixedly connected to the sensor connector 21 by a thread. According to the working principle of the auxiliary drilling tool, the auxiliary drilling tool can generate composite impact force in the circumferential direction and the axial direction when in work. The torque sensor 20 and the second force sensor 30 are respectively used for measuring the circumferential impact force and the axial impact force generated by the auxiliary drilling tool, and are collected, analyzed and calculated through a collection module.
In order to prevent the second force sensor 30 from rotating, a sensor rotation preventing shaft 22 is fixedly coupled to a lower end of the second force sensor 30 by means of a screw. A sensor rotation preventing sleeve 24 is fixedly mounted on the outer peripheral surface of the sensor rotation preventing shaft 22. In one embodiment, a screw thread and a plurality of screw mounting holes are provided on the outer circumferential surface of the sensor anti-rotation shaft 22. Meanwhile, a corresponding thread and a thread mounting hole are provided on the sensor rotation preventing sleeve 24, so that the sensor rotation preventing sleeve 24 is fixedly mounted on the sensor rotation preventing shaft 22 by the thread and the set screw 25 mounted in the thread mounting hole. Further, the upper end periphery of the sensor rotation preventing sleeve 24 is provided in a square shape, and a mounting groove (not shown) is provided on the square surface of the sensor rotation preventing sleeve 24. A square hole baffle plate 23 is sleeved and mounted in the mounting groove, and the square baffle plate 23 is welded on a sensor anti-rotation sleeve 24. The square baffle 23 prevents the impact force measuring mechanism 120 from rotating by being fixedly connected with the ground device, thereby ensuring the stability of the testing device 100 during use.
According to another aspect of the present invention, there is also provided a testing method for performance parameters of an auxiliary drilling tool, the testing method being performed using the testing apparatus 100 according to the present invention. First, the testing apparatus 100 is connected, and the pressure measuring mechanism 110 and the impact force measuring mechanism 120 are connected to both ends of the auxiliary drilling tool to be tested through the first joint 14 and the second joint 15, respectively. Thereafter, the testing device 100 is fixedly installed, the position of the first baffle 13 on the push cylinder 2 is adjusted, and the testing device 100 is fixed on the floor apparatus through the two first baffles 13 and the second baffle 23 in the testing device 100. The downhole conditions are then simulated by connecting the second port 72 in the cylinder 7 to the first hydraulic pump and to a reservoir or other fluid storage device. At the same time, the first fluid return connection 12 of the first connection 14 is connected by a line to a hydraulic pump and/or, by a line to a reservoir, the second fluid return connection 40 of the second connection 15 is connected by a line to a reservoir, thereby forming a closed loop between the testing device 100 and the auxiliary drilling tool, simulating the flow of drilling fluid downhole. Finally, the measurement is performed by the first force sensor 9, the second force sensor 30 and the torque sensor 20, and the data analysis is performed on the measurement results, thereby completing the simulation test. Therefore, the impact force of the auxiliary drilling tool to be tested is tested. Meanwhile, the testing device 100 can run for a long time to test the service life of the auxiliary drilling tool to be tested.
The testing apparatus 100 for the performance parameters of the auxiliary drilling tool according to the present invention is configured by connecting a pressure measuring mechanism 110 and an impact force measuring mechanism 120 to both ends of the auxiliary drilling tool to be tested, respectively. In testing, the pressure measurement mechanism 110 can simulate the applied weight-on-bit of the downhole drilling environment, and the first connector 14, the second connector 15 and the auxiliary tool in the testing device 100 can form a closed loop, thereby simulating the flow of the downhole drilling fluid. And the testing device 100 measures the performance of the auxiliary drilling tool and parameters such as impact force thereof through the force sensor and the torque sensor. Meanwhile, the testing device 100 can be continuously operated for a long time, thereby testing the service life of the auxiliary drilling tool. Therefore, reliable reference is provided for parameter design, material selection and production and processing procedure selection of the auxiliary drilling tool. The design of the auxiliary drilling tool is optimized according to the test result so as to enhance the speed-up performance of the auxiliary drilling tool and improve the working effect of the auxiliary drilling tool, thereby effectively improving the drilling efficiency of the drilling tool. In addition, the testing device 100 is simple in structure, convenient to install, easy to operate, and low in processing and manufacturing costs. Meanwhile, according to the testing method for the performance parameters of the auxiliary drilling tool, which is provided by the invention, the testing device 100 is used, so that the operation process is simple and convenient, and the testing efficiency of the simulation test is improved.
Although the various components of the testing device 100 for assisting the performance parameters of a drilling tool according to the present invention have been described in detail above, it should be understood that not all of the components are necessary. Rather, some of the components may be omitted as long as the corresponding functional implementation of the testing device 100 for assisting performance parameters of a drilling tool according to the present invention is not affected.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A testing device for assisting in the performance parameters of a drilling tool, comprising:
a pressure measurement mechanism (110) connected at a first end of the auxiliary drilling tool, the pressure measurement mechanism comprising:
a simulated pressure generating unit (50) for simulating the generation of weight on bit;
a first force sensor (9) for measuring the weight-on-bit reaction force; and
a first joint (14) for connecting the auxiliary drilling tool; and
an impact force measuring mechanism (120) connected at a second end of the auxiliary drilling tool, the impact force measuring mechanism comprising:
a second joint (15) for connecting the auxiliary drilling tool;
a torque sensor (20) for measuring a circumferential impact force generated by the auxiliary drill;
a second force sensor (30) for measuring an axial impact force generated by the auxiliary drilling tool; and
a sensor anti-rotation shaft (22) for preventing rotation of the torque sensor (20) and the second force sensor (30);
the first joint and the second joint are respectively provided with a first liquid return joint (12) and a second liquid return joint (40), and the first liquid return joint and the second liquid return joint are both connected with a liquid storage tank so as to form a closed loop between the testing device and the auxiliary drilling tool, so that the auxiliary drilling tool is tested.
2. Testing device according to claim 1, characterized in that the analog pressure generating unit comprises a hydraulic cylinder (7) which is open at both ends and in which a piston (6) is mounted in fixed connection with the first force sensor.
3. A testing device according to claim 2, characterized in that a push cylinder (2) is fixedly connected to the hydraulic cylinder, in which push cylinder a push rod (1) is arranged for adjusting the axial position of the push cylinder, which push rod is in contact with the piston.
4. A testing device according to claim 2 or 3, characterized in that the piston is provided with a radial flange and forms a dynamic seal with the inner wall of the cylinder, so that an annular first chamber (81) is formed between the piston and the cylinder, and a first opening (71) for communication with the atmosphere is provided in the outer wall of the cylinder corresponding to the first chamber.
5. The testing device according to claim 3 or 4, characterized in that a plug (3) is arranged between the hydraulic cylinder and the push cylinder, the plug is fixedly connected with the hydraulic cylinder and forms a seal, a dynamic seal is formed between the plug and the push rod, so that the plug and the piston form an annular second cavity (82) between the hydraulic cylinder and the push rod, and a second hole (72) for connecting a first hydraulic pump is arranged on the outer wall of the hydraulic cylinder corresponding to the second cavity.
6. A test device according to any one of claims 3 to 5, wherein a first baffle (13) is mounted on the outer periphery of the push sleeve and the first joint for fixed connection with a ground device.
7. Testing device according to claim 1, characterized in that the second return connection is mounted to the second connection by means of a rotating sealing sleeve (16) which is in sealing connection with the second return connection.
8. The test device of claim 1 or 7, wherein the torque sensor is each matingly connected to the second fitting and the second force sensor by a keyed connection.
9. The device according to claim 1, characterized in that the sensor rotation-preventing shaft is fixedly provided with a sensor rotation-preventing sleeve (24), and a second baffle (23) for fixed connection with a ground device is fixedly arranged on the sensor rotation-preventing sleeve.
10. A method for testing performance parameters of an auxiliary drilling tool comprises the following steps:
connecting a first end and a second end of an auxiliary drilling tool to a first joint and a second joint, respectively, according to any one of claims 1 to 9;
adjusting the position of a first baffle of the testing device, and fixing the testing device on a ground device through the first baffle and the second baffle;
connecting a second hole on the hydraulic cylinder with the first hydraulic pump to simulate the reaction force of the well bottom to the bit pressure of the auxiliary drilling tool, and/or connecting the first liquid return joint with a liquid storage tank through a second hydraulic pump and a pipeline, and directly connecting the second liquid return joint with the liquid storage tank through a pipeline so as to simulate the flow of drilling liquid in the well;
measurements are made by the first force sensor, the second force sensor and the torque sensor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111122158A (en) * | 2020-01-09 | 2020-05-08 | 中国科学院地质与地球物理研究所 | Directional rotating guide tool focusing bearing testing device |
| CN111795794A (en) * | 2020-07-13 | 2020-10-20 | 姜春林 | Rub-impact mechanism and rub-impact parameter measuring sensor |
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