CN110644969B - Device for testing pressure and/or torque and displacement relation of auxiliary drilling tool - Google Patents
Device for testing pressure and/or torque and displacement relation of auxiliary drilling tool Download PDFInfo
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- CN110644969B CN110644969B CN201810587138.4A CN201810587138A CN110644969B CN 110644969 B CN110644969 B CN 110644969B CN 201810587138 A CN201810587138 A CN 201810587138A CN 110644969 B CN110644969 B CN 110644969B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/04—Automatic control of the tool feed in response to the torque of the drive ; Measuring drilling torque
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/06—Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/08—Automatic control of the tool feed in response to the amplitude of the movement of the percussion tool, e.g. jump or recoil
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
Abstract
According to the present invention there is provided a pressure and/or torque versus displacement testing apparatus for an auxiliary drilling tool, comprising: a pressure measurement mechanism connected at a first end of the auxiliary drilling tool, comprising: the simulation pressure generation unit is used for simulating and generating axial impact force of the well bottom to the auxiliary drilling tool; a force sensor; and a first joint for connecting the auxiliary drilling tool; and a torque measuring mechanism connected at a second end of the auxiliary drill, comprising: a second joint for connecting the auxiliary drilling tool; a torque sensor and a torque joint; the testing device can measure the relationship between the pressure and the torque under the condition of the current screw pair parameters of the auxiliary drilling tool and the compression amount of the spring of the auxiliary drilling tool. The invention also provides a method for testing the relation between the pressure and/or the torque and the displacement of the auxiliary drilling tool.
Description
Technical Field
The invention belongs to the technical field of petroleum industry machinery, and particularly relates to a device for testing the relation between pressure and/or torque and displacement of an auxiliary drilling tool. The invention also relates to a method for testing the pressure and/or torque and displacement relation of the auxiliary drilling tool.
Background
With the continuous development of oil drilling technology, many drilling tools with different functions have emerged in order to meet the demands in the drilling engineering. Meanwhile, with the rapid development of science and technology, the performance of the drilling tool in the prior art is greatly improved.
However, under some special operating conditions, some problems still exist. For example, when the drill bit is constructed in a soft and hard staggered stratum or a hard stratum, the stratum has large lithological change or strength, and the soft and 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 a 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, falling objects in the well and the like which influence the drilling period and the drilling cost.
Therefore, the auxiliary drilling tool, such as a pressurizing, damping and torsion-stabilizing drilling speed-increasing tool, can be used for reducing the impact of the underground axial vibration on the drill bit during the drilling process, and meanwhile, the designed bit pressure can be applied to the drill bit, so that the drill bit is provided with impact force with high-frequency change and axial and circumferential composite directions. The rotary motion when exceeding the set torque is converted into linear motion, the drill column of the drill bit is prevented from stalling, and the problems of the drill bit in a hard stratum and an interlayer such as suppressed tripping, stick slip, "stalling" and slow mechanical drilling speed are solved.
In the prior art, a damping and torsion stabilizing mechanism in a pressurizing, damping and torsion stabilizing drilling and accelerating tool comprises a spring (such as a disc spring), a screw pair and other parts. When stall occurs, the spindle of the screw pair rotates under the action of large torque and differential speed, the spring is compressed, and at the moment, the lower drilling tool is lifted for a certain distance to release part of reaction torque. In addition, when the drilling tool just contacts the bottom of the well, the axial vibration generated greatly damages the drill bit, the spiral auxiliary mandrel moves upwards to compress the spring, the damage energy of the vibration can be stored in the spring, the impact is effectively reduced, and the damage to the drill bit is reduced. Therefore, the screw pair structure plays a great role in a pressurizing, damping, stable-torsion and percussion drilling speed-up tool, relevant parameters such as tooth shapes, the number of screw heads, a helix angle, a friction coefficient between materials and the like of the screw pair have great influence on the performance of the tool, and the type of the spring is determined. Therefore, it is important to correctly design the drilling tool to improve the performance of the drilling tool to test the pressure-to-displacement relationship and/or the torque-to-displacement relationship of the auxiliary drilling tool (e.g., a pressurized shock-absorbing steady-twist-percussion drilling acceleration tool), wherein the displacement refers to the compression amount of the spring in the auxiliary drilling tool, i.e., the relationship between the pressure and/or torque of the auxiliary drilling tool and the compression amount of the spring.
Disclosure of Invention
In view of at least some of the above-mentioned technical problems, the present invention aims to provide a testing device for assisting the pressure and/or torque versus displacement of a drill. The testing device can simulate the applied bit pressure of the underground drilling environment, can measure the relation between the pressure and the spring compression amount of the auxiliary drilling tool under the condition of the screw pair parameter of the auxiliary drilling tool through the force sensor, and can measure the relation between the torque and the spring compression amount under the condition of the screw pair parameter through the torque sensor. The relationship between a plurality of groups of pressure and torque and the compression amount of the spring can be measured by changing the parameters of the screw pair of the auxiliary drilling tool. 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 a testing result.
According to a first aspect of the present invention there is provided a test apparatus for assisting the pressure and/or torque versus displacement of a drill tool, comprising: a pressure measurement mechanism connected at a first end of the auxiliary drilling tool, the pressure measurement mechanism comprising: the generating unit is used for simulating and generating reaction force of the bit pressure on the auxiliary drilling tool; a force sensor for measuring the reaction force of the weight on bit to the auxiliary drilling tool; the first connector is used for connecting the auxiliary drilling tool and is connected with the liquid storage tank through a first liquid return connector; and a torque measuring mechanism connected at a second end of the auxiliary drill, the torque measuring mechanism comprising: the second joint is used for connecting the auxiliary drilling tool and is connected with the liquid storage tank through a second liquid return joint; a torque sensor; and a torque joint for receiving a torque applied at the time of testing and transmitting the torque to the second joint.
In a preferred embodiment, the torque joint is connected with a fixed seat, wherein a groove is formed in an end surface of the torque joint, an axial protrusion is formed at one end of the fixed seat, and the axial protrusion of the fixed seat is mounted in the groove of the torque joint through a bearing.
In a preferred embodiment, a mounting sleeve is provided on the outer circumference of the connection region between the torque connection and the fastening seat.
In a preferred embodiment, a first baffle plate for fixedly connecting with a ground device is arranged on the fixed seat.
In a preferred embodiment, the torque sensor is connected with the second joint and the torque joint in a matching way in a key connection mode and is located between the second joint and the torque 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 analog pressure generating unit comprises a hydraulic cylinder with both ends configured as openings, in which a piston is mounted in fixed connection with the 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 second baffle plate fixedly connected with a ground device is arranged on the periphery of the push cylinder and the periphery of the first joint.
According to a second aspect of the present invention, there is provided a method for testing the pressure and/or torque versus displacement of an auxiliary drill, 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 positions of a first baffle and a second 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 the drilling fluid in the well;
and measuring through the force sensor and the torque sensor to obtain the relationship between the spring compression amount, the pressure and the torque of the auxiliary drilling tool.
Drawings
The present invention will be described below with reference to the accompanying drawings.
Fig. 1 shows the structure of a test device for assisting the pressure and/or torque versus displacement of a drill 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 test device 100 for assisting the pressure and/or torque versus displacement of a drill tool according to the present invention. As shown in fig. 1, the testing apparatus 100 includes a pressure measuring mechanism 110 and a torque measuring mechanism 120 for connecting to both ends of an auxiliary drilling tool to be tested, respectively. Wherein the pressure measuring mechanism 110 is used for connecting with the upstream end of the auxiliary drilling tool to be measured, and the torque measuring mechanism 120 is used for connecting with the downstream end of the auxiliary drilling tool to be measured. The testing apparatus 100 is capable of measuring the relationship between the pressure and/or torque and the displacement of the auxiliary drilling tool (i.e. the compression amount of the spring of the auxiliary drilling tool) under the condition of the given screw pair parameters (such as screw pair tooth form, screw head number, helix angle and material) by installing the pressure measuring mechanism 110 and the torque measuring mechanism 120 in the auxiliary drilling tool to be tested and simulating the applied bit pressure of the underground drilling environment through a sensor. Thus, the test apparatus 100 may be used to test the relationship between pressure and spring compression of the auxiliary drill, torque and spring compression, or both. Meanwhile, the relationship between a plurality of groups of pressure and torque and the compression amount of the spring can be measured by changing the parameters of the screw pair 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, 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 the downhole drilling tool to enhance the working performance of the drilling tool. The auxiliary drilling tool is particularly a pressurized damping stable-torsion percussion drilling acceleration tool and comprises an impact energy generator, an impact energy distributor and a damping stable-torsion device arranged between the impact energy generator and the impact energy distributor, wherein the damping stable-torsion device comprises an axially telescopic spring (such as a disc spring). A specific example of such an auxiliary drilling tool is found in chinese patent application 201810392282.2 entitled "a downhole auxiliary drilling tool" filed by the same applicant on 27.4.2018, 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 and generating the reaction force of the drilling pressure of the well bottom to 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. A seal (for example, a greige ring) is mounted between the radial flange of the piston 8 and the inner wall of the cylinder to ensure a seal between the radial flange and the cylinder 7. And the end of the piston 8 which is not provided with the radial flange passes through the 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 inner 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 a plug. A mounting groove (not shown) is formed in the outer circumferential surface of the push cylinder 2, a second baffle 13 is mounted in the mounting groove, and the second baffle 13 is used for being fixedly connected with a 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 second 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 this 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 threaded fit, the lower end of the plug 3 is fixedly connected with the hydraulic cylinder 7 through threaded 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. Sealing elements 4, for example, several sets of O-rings, are installed 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 cavity 82, and the second hole 72 is used for connecting a first hydraulic pump.
During the test, the second hole 72 in the hydraulic cylinder 7 is connected to the first hydraulic pump via a hydraulic line and is pressurized by the 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.
As shown in fig. 1, the pressure testing mechanism 110 further includes a force sensor 9. The force sensor 9 is used to measure the weight on bit reaction force of the bottom hole to the auxiliary drilling tool generated by simulation. The force sensor 9 is installed at the lower end of the hydraulic cylinder 7 and is fixedly connected with the piston 8. In one embodiment, a circular hole is provided axially inwardly in the lower end surface of the piston 8, and the surface of the circular hole is threaded. The force sensor 9 is fixedly connected to the piston 8 by means of a thread.
According to the invention, the pressure measuring means 110 further comprises a first connector 14 for connecting an auxiliary drill. As shown in fig. 1, the first joint is arranged at the downstream end of the 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 coupling button 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 the present embodiment, the slider 10 is fixedly connected between the force sensor 9 and the first joint 14. In one embodiment, the slider 10 is in a fixed connection with the force sensor 9 and the first joint by means of a thread, and the slider 10 forms a seal with the first joint 14.
In addition, a mounting groove (not shown) in which the second barrier 13 is mounted is processed on an outer side surface of the first joint 14. During installation, the second 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 torque measuring means 120 comprises a second joint 15 for connecting an auxiliary drill. As shown in fig. 1, the upper end of the second connector 15 is also provided with a tapered coupling screw threaded 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 fluid return connection 40 is connected to the mounting hole of the rotary sealing sleeve 16 by welding. In operation, the second connector 15 is connected to the reservoir via the second fluid return connector 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 downstream 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 torque joint 21 is connected to the downstream end of the torque sensor 20. In one embodiment, the torque sensor 20 and the torque connector 21 form a mating connection by way of a keyed connection. In the test of measuring the relationship between the torque and the compression amount of the spring of the auxiliary drill, the torque is applied to the torque connector 21, so that the torque connector 21 drives the torque sensor 20 and the second connector 15 to rotate, thereby driving the auxiliary drill to rotate. Therefore, under the action of the screw pair of the auxiliary drilling tool, the spring of the auxiliary drilling tool is compressed, and the relation between the torque and the spring compression amount is measured under the condition of the current screw pair parameters.
In the present embodiment, a fixing seat 24 is connected to a lower end of the torque joint 21. As shown in fig. 1, the end surface of the torque connector 21 is provided with an axially inward recess, and one end of the fixing seat 24 is provided with an axial projection. When the torque connector is installed and connected, the roller bearing 23 is installed on the axial protrusion of the fixed seat 24, and then the axial protrusion of the fixed seat 24 is installed in the groove of the torque connector 21. The roller bearing 23 is effective to reduce friction between the torque joint 21 and the fixed seat 24. The torque connector 21 and the fixed seat 24 are axially connected through a mounting sleeve 22, and the mounting sleeve 22 is mounted on the outer surface of the connection position of the torque connector 21 and the fixed seat 24. The inner surface of the mounting sleeve 22 is threaded, and a first step protruding radially inward is formed inside one end of the mounting sleeve 22. The outer surface of the lower end of the torque joint 21 is provided with a section of thread, and the end surface of the fixed seat 24 connected with the torque joint 21 is provided with a second step protruding radially outwards. The screw thread on the mounting sleeve 22 is in fit connection with the screw thread on the torque connector 21, and the first step of the mounting sleeve 22 is in fit installation with the second step of the fixed seat 24, so that fit connection is formed between the torque connector 21 and the fixed seat 24. When pressure is applied to the torque connector 21, the rolling bearing 23 is installed between the torque connector 21 and the fixed seat 24, and the fixed seat 24 is fixedly connected with the ground device through the second baffle 13. The connection structure of the torque joint 21 and the fixed seat 24 can effectively reduce the loss of the torque applied in the test.
In addition, in order to prevent the torque measuring mechanism 120 from rotating, a first blocking plate 30 is installed on the outer surface of the fixed seat 24. Through installing first baffle 30 on the ground device to effectively prevent that testing arrangement 100 from taking place to rotate, guarantee testing arrangement 100's stability, ensure the accuracy of test result.
According to another aspect of the present invention, there is also provided a method for testing the pressure and/or torque versus displacement of an auxiliary drill tool, the testing method being tested using the testing apparatus 100 according to the present invention. First, the testing apparatus 100 is connected, and the pressure measuring means 110 and the torque measuring means 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. Then, the position of the second baffle 13 on the push cylinder 2 is adjusted, and both the second baffle 13 and the first baffle 30 in the testing device 100 are fixedly mounted on the ground device, so that the testing device 100 is fixedly mounted. The downhole conditions are then simulated and the second bore 72 in the cylinder 7 is connected to the first hydraulic pump and to a reservoir or other fluid storage device. The first fluid return joint 12 on the first joint 14 is connected with the second hydraulic pump and is connected with the liquid storage tank through a pipeline, and the second fluid return joint 40 on the second joint 15 is directly connected with the liquid storage tank through a pipeline, so that a closed loop is formed between the testing device 100 and the auxiliary drilling tool, and the flow of the underground drilling fluid is simulated. Therefore, the reaction force of the bottom of the well on the bit pressure generated by the auxiliary drilling tool in the drilling process is simulated in the hydraulic cylinder 7, so that the spring is compressed under the action of the spiral pair of the auxiliary drilling tool, and the relation between the pressure and the compression amount of the spring under the condition of the current parameters of the spiral pair can be measured. When torque is applied to the torque connector 22, the spring is compressed under the action of the screw pair of the auxiliary drilling tool, so that the relationship between the torque and the spring compression under the condition of the current screw pair parameters can be measured. By changing the parameters of the screw pair, the relationship between a plurality of groups of pressure and torque and the compression amount of the spring can be measured. The testing device can also simultaneously measure the relation between the pressure and the torque under the condition of the screw pair parameters and the compression amount of the spring. And finally, analyzing and summarizing test results to finish the test.
The testing device 100 for the pressure and/or torque versus displacement of the auxiliary drilling tool according to the present invention is configured by connecting a pressure measuring mechanism 110 and a torque 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 drilling working condition is simulated, so that the spring is compressed under the action of the spiral pair of the auxiliary drilling tool, and the relation between the pressure and the spring compression amount under the conditions of the current spiral pair parameter and the spring parameter can be measured. When torque is applied to the torque joint 22, the spring is compressed under the action of the screw pair of the auxiliary drilling tool, so that the force sensor 9, the torque sensor 20 and the ruler can measure the relationship between the torque and the spring compression under the conditions of current screw pair parameters and spring parameters. In addition, by changing the parameters of the screw pair and the spring parameters, the relationship between multiple groups of pressure and torque and the spring compression amount can be measured. The testing device can also simultaneously measure the relationship between the pressure and the torque of the screw pair parameters and the spring compression amount. 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 method for testing the relation between the pressure and/or the torque and the displacement 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 is improved.
Although the various components of the test apparatus 100 for assisting the pressure and/or torque versus displacement of a drill tool according to the present invention have been described in detail above, it should be understood that not all of the components are required. Rather, some of the components may be omitted as long as the corresponding functional implementation of the testing device 100 for assisting the pressure and/or torque versus displacement relationship of a drill 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 constitute any limitation to 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 (8)
1. A test apparatus for assisting the pressure and torque versus displacement of a drill tool, comprising:
a pressure measurement mechanism (110) connected at a first end of the auxiliary drilling tool, the pressure measurement mechanism comprising:
a generating unit (50) for simulating the generation of reaction force of weight on bit to the auxiliary tool;
a force sensor (9) for measuring the reaction force of the weight on bit to the auxiliary tool; and
a first connector (14) for connecting the auxiliary drilling tool, wherein the first connector (14) is connected with a liquid storage tank through a first liquid return connector (12); and
a torque measuring mechanism (120) connected at a second end of the auxiliary drill, the torque measuring mechanism comprising:
a second connector (15) for connecting the auxiliary drilling tool, wherein the second connector (15) is connected with the liquid storage tank through a second liquid return connector (40);
a torque sensor (20); and
a torque joint (21) for taking up the torque applied during the test and transmitting said torque to said second joint (15),
the generating unit comprises a hydraulic cylinder (7) with two ends both constructed into openings, a piston (8) fixedly connected with the force sensor is installed in the hydraulic cylinder, a push cylinder (2) is fixedly connected with the hydraulic cylinder, a push rod (1) used for adjusting the axial position of the push cylinder is arranged in the push cylinder, the push rod is in contact with the piston, the piston is provided with a radial flange and forms dynamic seal with the inner wall of the hydraulic cylinder, so that an annular first cavity (81) is formed between the piston and the hydraulic cylinder, a first hole (71) communicated with the atmosphere is formed in the outer wall of the hydraulic cylinder corresponding to the first cavity, a plug (3) is arranged between the hydraulic cylinder and the push cylinder, the plug is fixedly connected with the hydraulic cylinder and forms seal, and seal is formed between the plug and the push rod, so that an annular second cavity (an annular second cavity) is formed between the plug and the piston between the hydraulic cylinder and the push rod 82) And a second hole (72) for connecting a first hydraulic pump is formed in the outer wall of the hydraulic cylinder corresponding to the second cavity.
2. The testing device according to claim 1, characterized in that the torque joint is connected with a fixing seat (24), wherein the end surface of the torque joint is provided with a groove, one end of the fixing seat is provided with an axial projection, and the axial projection of the fixing seat is mounted in the groove of the torque joint through a bearing (23).
3. Testing device according to claim 2, characterized in that a mounting sleeve (22) is provided on the periphery of the connection area between the torque joint and the holder.
4. A testing device according to claim 2 or 3, wherein a first baffle (30) is provided on the holder for fixed connection to a floor means.
5. The testing device of any one of claims 1 to 3, wherein the torque sensor is keyed to and between the second fitting and the torque fitting, respectively.
6. Testing device according to any one of claims 1 to 3, characterized in that the second return connection is mounted to the second connection by means of a rotary sealing sleeve (16) which is sealingly connected to the second return connection.
7. The test device according to claim 1, wherein a second baffle (13) is mounted on the outer circumference of the push cylinder and the first joint for fixed connection with a ground device.
8. The test method for the relationship between the pressure and the torque of the auxiliary drilling tool and the displacement comprises the following steps:
connecting the first and second ends of the auxiliary drilling tool to the first and second joints, respectively, of the testing device according to any one of claims 1 to 7;
adjusting the positions of a first baffle and a second 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 reaction force of the well bottom on the drilling bit of the auxiliary drilling tool, 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 downhole drilling fluid;
and measuring through the force sensor and the torque sensor to obtain the relation between the pressure and the torque of the auxiliary drilling tool and the displacement.
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| CN111122158B (en) * | 2020-01-09 | 2021-06-01 | 中国科学院地质与地球物理研究所 | Directional rotating guide tool focusing bearing testing device |
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| US4515011A (en) * | 1983-05-06 | 1985-05-07 | Baker Oil Tools, Inc. | Torque transmitting and indicating device for well drilling apparatus |
| JPS61186617A (en) * | 1985-02-13 | 1986-08-20 | Konoike Constr Ltd | Method of managing execution of excavation of spread bottom drive-in-place pile |
| CN2700558Y (en) * | 2004-01-05 | 2005-05-18 | 辽河石油勘探局 | Down-hole mechanical parameter measuring instrument for directional drilling |
| CN104563908A (en) * | 2015-01-19 | 2015-04-29 | 西南石油大学 | Friction decreasing and resistance reducing torque clutch device and method thereof |
| CN106837311A (en) * | 2017-02-21 | 2017-06-13 | 中石化石油机械股份有限公司江钻分公司 | A kind of downhole testing device of anti-brake tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050284659A1 (en) * | 2004-06-28 | 2005-12-29 | Hall David R | Closed-loop drilling system using a high-speed communications network |
| US8875810B2 (en) * | 2006-03-02 | 2014-11-04 | Baker Hughes Incorporated | Hole enlargement drilling device and methods for using same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4515011A (en) * | 1983-05-06 | 1985-05-07 | Baker Oil Tools, Inc. | Torque transmitting and indicating device for well drilling apparatus |
| JPS61186617A (en) * | 1985-02-13 | 1986-08-20 | Konoike Constr Ltd | Method of managing execution of excavation of spread bottom drive-in-place pile |
| CN2700558Y (en) * | 2004-01-05 | 2005-05-18 | 辽河石油勘探局 | Down-hole mechanical parameter measuring instrument for directional drilling |
| CN104563908A (en) * | 2015-01-19 | 2015-04-29 | 西南石油大学 | Friction decreasing and resistance reducing torque clutch device and method thereof |
| CN106837311A (en) * | 2017-02-21 | 2017-06-13 | 中石化石油机械股份有限公司江钻分公司 | A kind of downhole testing device of anti-brake tool |
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