Drilling tool vibration experiment device and method

Abstract

The invention relates to the technical field of oil and gas drilling, and provides a drilling tool vibration experiment device and method.The drilling tool vibration experiment device comprises a first liquid supply part, a second liquid supply part, a driving part, a balance weight part and a drilling tool part; one end of the drilling tool part is communicated with the driving part, the other end of the drilling tool part is communicated with the balance weight part, so that the balance weight part is communicated with a flow channel of the drilling tool part to form an inner flow channel, the balance weight part is arranged at the joint of the driving part and the drilling tool part in a sleeving mode, one end of the drilling tool part is located in a well and penetrates through the well to be aligned with rock, and the balance weight part is located above the well; an outer flow channel is formed by the outer wall of the drilling tool part and the inner wall of the well, and the inlet end and the outlet end of the outer flow channel are both communicated with the second liquid supply part. Through the device, the impact acting force on the drilling tool part in the drilling fluid circulation process can be effectively simulated, the stress condition of each part is analyzed, the alternating stress of the drilling tool part caused by frequent and violent vibration is avoided, the fatigue fracture damage of the drilling tool part is avoided, and the economic loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas drilling, and in particular relates to a drilling tool vibration test device and method. Background Art

[0002] Drilling engineering is an important part of developing oil and natural gas resources, and the drill string is one of the core components of the drilling system, including the drill pipe and the bottom hole assembly (BHA). During the drilling process, the rotary table or top drive that continuously rotates on the ground inputs energy into the drill string system, and the energy is transmitted from the wellhead to the drill bit at the bottom of the well through the drill string. Under the action of the deadweight of the BHA, the impact force of the circulating drilling fluid, and the torque transmitted by the drill string, the drill bit directly contacts the formation, cuts the rock and forms a wellbore, and the rock cuttings broken by the drill bit are carried out of the wellbore by the drilling fluid, completing the drilling process.

[0003] Compared with on-site drilling experiments, the test bench starts from the dynamic equation of the drill string system and designs a scaled test bench through dimensional analysis. It can reproduce various phenomena in drilling operations. It is a more efficient, convenient, reliable and low-cost research method, and an important research method for studying the vibration characteristics of BHA. However, the existing test bench does not consider the impact of high-speed fluid on the vibration characteristics of BHA during the circulation of drilling fluid. As drilling projects enter the deep well and ultra-deep well stage, the kinetic energy required for drilling fluid circulation is stronger. Under the impact coupling of high-speed fluid, the vibration characteristics of BHA will change significantly, which will not only affect the construction efficiency of drilling, but also bring serious safety risks. Frequent and violent vibrations lead to alternating stress of the drill string, which will cause fatigue fracture damage of the drill string, thereby increasing construction costs and causing large economic losses. Summary of the invention

[0004] In view of the above problems, the present invention proposes a drilling tool vibration experimental device, comprising: a first liquid supply part, a second liquid supply part, a driving part, a counterweight part and a drilling tool part, one end of the first liquid supply part is connected with the second liquid supply part, and the other end is connected with the counterweight part so that the counterweight part and the flow channel of the drilling tool part are connected to form an inner flow channel, the counterweight part is sleeved at the connection between the driving part and the drilling tool part, one end of the drilling tool part is located in the well and passes through the well to be aligned with the rock, and the counterweight part is located above the well, the outer wall of the drilling tool part and the inner wall of the well form an outer flow channel, and the inlet end and the outlet end of the outer flow channel are both connected with the second liquid supply part.

[0005] Optionally, the drilling tool part includes a drill collar and a drill bit, one end of the drill collar is connected to the driving part and communicates with the flow channel of the counterweight part, the counterweight part is sleeved at the connection between the drill collar and the driving part, the other end of the drill collar passes through the well and is connected to the drill bit, and the external flow channel is formed between the outer wall of the drill collar and the inner wall of the well.

[0006] Optionally, the counterweight part includes a first water pipe, a first adapter, a second adapter and a stacked counterweight block, one end of the first water pipe is connected to the first liquid supply part, and the other end of the first water pipe passes through the first adapter, the second adapter and the counterweight block in sequence to be connected to the flow channel of the drilling tool part to form the internal flow channel, the first adapter is sleeved on the shaft of the driving part, the second adapter and the counterweight block are sleeved at the connection between the driving part and the drilling tool part, the first adapter is located above the second adapter, and the second adapter is arranged on the counterweight block.

[0007] Optionally, through holes are provided on the stacked counterweight blocks, and the through holes are aligned with each other, and the first water pipe extends into each through hole to communicate with the flow channel of the drilling tool part.

[0008] Optionally, the first liquid supply part includes a water storage tank, a first mud pump and a second water pipe which are connected in sequence, the second water pipe is connected to the flow channel of the counterweight part, and the water storage tank is connected to the second liquid supply part through a pipeline.

[0009] Optionally, the second liquid supply part includes a water reservoir, a second mud pump and a water hose, one end of the water hose passes through the inlet end of the well and extends into the outer flow channel, and the other end of the water hose is connected to the second mud pump. The second mud pump is placed in the water reservoir, the outlet end of the outer flow channel is connected to the water reservoir, the inner flow channel is connected to the water reservoir, and the rock is placed in the water reservoir.

[0010] Optionally, a pressure sensor is provided on the outer wall of the water reservoir, and the rock faces the pressure sensor.

[0011] Optionally, it also includes a supporting part, which includes an upper support and a lower support, the driving part is arranged on the upper support, the well and the first liquid supply part are respectively arranged on the lower support, the end of the drilling tool part passes through the well and the lower support in sequence, and the lower support is located above the second liquid supply part.

[0012] Optionally, it also includes a data acquisition unit and a detection unit connected to each other, wherein the data acquisition unit is arranged on the supporting end of the second liquid supply unit, a part of the detection unit is arranged on the end of the drilling tool unit, and the other part is arranged on the lower bracket.

[0013] Optionally, the detection unit includes an acceleration sensor and an angular displacement sensor, the acceleration sensor is arranged on the end of the drilling tool part, and the angular displacement sensor is provided on the lower bracket to detect the rotation speed of the drilling tool part.

[0014] Optionally, the driving part includes a driving motor and a spline sleeve, the spline sleeve is sleeved on the shaft of the driving motor, and the counterweight part is sleeved at the connection between the spline sleeve and the drilling tool part.

[0015] The present invention also provides a drilling tool vibration test method, the method comprising:

[0016] According to the communication between the first liquid supply part and the counterweight part, the counterweight part is connected with the flow channel of the drilling tool part to form an inner flow channel;

[0017] The counterweight part is sleeved at the connection between the driving part and the drilling tool part, and one end of the drilling tool part is located in the well and passes through the well to align with the rock;

[0018] An outer flow channel is formed according to the outer wall of the drilling tool part and the inner wall of the well, and the fluid flows into the outer flow channel through the inlet end of the outer flow channel.

[0019] The drilling tool vibration experimental device of the present invention has the other end of the first liquid supply part connected to the counterweight part so that the counterweight part can be connected to the flow channel of the drilling tool part to form an inner flow channel, the other end of the driving part passes through the counterweight part and is connected to one end of the drilling tool part, the drilling tool part is located in the well and passes through the well to align with the rock, thereby realizing the simulation of the inner flow channel, the liquid is transported from the first liquid supply part to the inner flow channel and finally to the end of the drilling tool part so as to impact the rock at the same time when drilling the rock, and the debris generated by drilling the rock is flushed into the second liquid supply part, the outer wall of the drilling tool part and the inner wall of the well form an outer flow channel, the inlet end and the outlet end of the outer flow channel are connected to each other. The mouth ends are connected with the second liquid supply part to realize the simulation of the external flow channel. The debris is transported to the external flow channel along with the liquid from the inlet end of the second liquid supply part to realize the simulation of the impact of two liquids of different densities on the inner and outer walls of the drill tool part. The debris liquid can also flow back to the second liquid supply part from the outlet end for recycling. The device can simulate the real drilling process and effectively simulate the impact force on the drill tool part during the circulation of the drilling fluid. By analyzing the stress conditions of each component, the alternating stress of the drill tool part caused by frequent and severe vibration can be avoided, fatigue fracture damage of the drill tool part can be avoided, and economic losses can be reduced.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a drilling tool vibration experiment device in an embodiment of the present invention is shown;

[0023] Figure 2 A front view of a drilling tool vibration test device in an embodiment of the present invention is shown;

[0024] Figure 3 A cross-sectional schematic diagram of a drilling tool vibration test device in an embodiment of the present invention is shown;

[0025] Figure 4 A schematic diagram showing a top view of a counterweight block of a drilling tool vibration test device in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram showing the flow directions of the inner and outer flow channels of the drilling tool vibration test device in an embodiment of the present invention is shown;

[0027] Figure 6 The experimental flow chart of the drilling tool vibration experimental device in the embodiment of the present invention is shown;

[0028] Figure 7 A flow chart of a drilling tool vibration test method in an embodiment of the present invention is shown.

[0029] In the figure, 1, the first liquid supply part; 11, the water tank; 12, the first mud pump; 13, the second water pipe; 2, the second liquid supply part; 21, the water reservoir; 22, the second mud pump; 23, the water hose; 3, the driving part; 30, the pressure sensor; 31, the driving motor; 32, the spline sleeve; 4, the counterweight part; 41, the first adapter; 42, the second adapter; 43, the counterweight block; 44, the first water pipe; 430, the through hole; 5, the drilling tool part; 50, the inner flow channel; 51, the drill collar; 52, the drill bit; 6, the supporting part; 60, the outer flow channel; 61, the upper bracket; 62, the lower bracket; 63, the connecting rod; 64, the support; 65, the angular displacement sensor; 7, the rock; 53, the acceleration sensor; 8, the well; 81, the inlet end; 82, the outlet end; 9, the data acquisition part. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1As shown, the present invention provides a drilling tool vibration experimental device, comprising: a first liquid supply part 1, a second liquid supply part 2, a driving part 3, a counterweight part 4 and a drilling tool part 5, one end of the first liquid supply part 1 is connected with the second liquid supply part 2, and the other end is connected with the counterweight part 4 so that the counterweight part 4 can be connected with the flow channel of the drilling tool part 5 to form an inner flow channel 50, the counterweight part 4 is sleeved at the connection between the driving part 3 and the drilling tool part 5, one end of the drilling tool part 5 is located in the well 8 and passes through the well 8 to align with the rock 7, and the counterweight part 4 is located above the well 8, through the simulated inner flow channel 50, the drilling fluid in the first liquid supply part 1 can be transported to the flow channel of the counterweight part 4 and finally flow into the flow channel of the drilling tool part 5, the drilling fluid can impact the rock 7 along with the drill bit 52 on the drilling tool part 5, and the drilled rock 7 fragments are flushed into the second liquid supply part 2 together with the drilling fluid, thereby realizing the drilling simulation of the inner flow channel 50. The outer wall of the drill tool part 5 and the inner wall of the well 8 form an outer flow channel 60, and the inlet end 81 and the outlet end 82 of the outer flow channel 60 are both connected to the second liquid supply part 2. By transporting the liquid from the inlet end 81 of the second liquid supply part 2 to the outer flow channel 60 and finally flowing back to the second liquid supply part 2 from the outlet end 82 for recycling, the simulation of the outer flow channel 60 is realized. The drilling fluid provided by the first liquid supply part 1 and the second liquid supply part 2 impacts the drill tool part 5 in both the inner flow channel 50 and the outer flow channel 60, so that the data of the impact on the drill tool part 5 can be collected for analysis, and then the fluid-solid coupling vibration law associated with it can be accurately understood, which will bring positive economic benefits and academic value to the drilling project. The liquid flowing down the inner flow channel 50 finally flows into the second liquid supply part 2, so that the debris formed after drilling the rock 7 can be easily flowed into the second liquid supply part 2. In addition, since the first liquid supply part 1 and the second liquid supply part 2 are connected, in order to prevent one of the liquid supply parts from being empty of liquid, the other liquid supply part is required to be able to transport liquid, so that there is liquid inside the first liquid supply part 1 and the second liquid supply part 2. Different drilling pressures can be applied to the drill tool part 5 through the counterweight part 4. Of course, the weight of the counterweight part 4 needs to be adjusted. The device can simulate the real drilling process and effectively simulate the impact force on the drill tool part 5 during the circulation of the drilling fluid. By analyzing the stress conditions of these components, the alternating stress of the drill tool part 5 caused by frequent and severe vibrations can be avoided, and fatigue fracture damage of the drill tool part 5 can be avoided, reducing economic losses.

[0032] In one embodiment, the drilling tool part 5 includes a drill collar 51 and a drill bit 52. One end of the drill collar 51 is connected to the driving part 3 and communicates with the flow channel of the counterweight part 4. The counterweight part 4 is sleeved at the connection between the drill collar 51 and the driving part 3. The other end of the drill collar 51 passes through the well 8 and the lower bracket 62 on the support part 6 in turn and is connected to the drill bit 52. The acceleration sensor 53 is arranged on the end of the drill collar 51. The outer flow channel 60 is formed between the outer wall of the drill collar 51 and the inner wall of the well 8. It should be noted that, if Figure 2As shown, the drill collar 51 has a flow channel inside, so the flow channel of the counterweight part 4 and the flow channel of the drill collar 51 together form an inner flow channel 50, so that by simulating the inner flow channel 50 and the outer flow channel 60, and providing drilling fluid to the inner flow channel 50 and the outer flow channel 60 respectively through the first liquid supply part 1 and the second liquid supply part 2, it is realized to simulate the real drilling process and effectively simulate the impact force on the drill tool part 5 during the circulation of the drilling fluid. The acceleration sensor 53 is used to collect the axial and lateral vibration acceleration of the drill collar 51 and analyze the axial and lateral vibration of the entire drill tool part 5. The drill collar 51 is driven to rotate by the driving part 3, and then the drill bit 52 is driven to rotate, so that the drill bit 52 drills through the rock 7. In addition, the drill collar 51 can be replaced with other types of drilling tools, and different types of drill bits 52 can also be used, and the two are connected by threads. The rotation speed required for drilling is provided by the driving part 3, and the counterweight part 4 is sleeved on the driving part 3 and the drill collar 51, so that the counterweight part 4 can provide drilling pressure to the drill collar 51 without being tight, and the flow channel of the counterweight part 4 can be connected with the flow channel of the drill collar 51. When the drilling fluid is provided, the drill bit 52 is driven by the rotation speed and drilling pressure transmitted by the drill collar 51 to break the rock 7. Optionally, the drill collar 51 is a thick-walled steel pipe with holes at both ends, and the hollow part inside the steel pipe is used as a drainage channel of the drill collar 51; after the drill bit 52 is connected to the drill collar 51, the function of the drainage channel of the drill collar 51 is not affected.

[0033] like Figure 1 As shown, in one embodiment, the counterweight part 4 includes a first water pipe 44, a first adapter 41, a second adapter 42 and a stacked counterweight 43, one end of the first water pipe 44 is connected to the first liquid supply part 1, and the other end passes through the first adapter 41, the second adapter 42 and the counterweight 43 in sequence to communicate with the flow channel of the drilling tool part 5 to form an inner flow channel 50, the first adapter 41 is sleeved on the shaft of the driving part 3, the second adapter 42 and the counterweight 43 are sleeved at the connection between the driving part 3 and the drilling tool part 5, the first adapter 41 is located above the second adapter 42, and the second adapter 42 is arranged on the counterweight 43. Optionally, the drilling pressure of the drill bit 52 can be adjusted by adjusting the number of stacked counterweights 43, and of course, the more the number of counterweights 43, the greater the drilling pressure. The first water pipe 44 passes through the stacked counterweights 43 to form a flow channel on the counterweight 43, and the first water pipe 44 can extend to or align with the drill collar 51 of the drilling tool part 5 to finally form an inner flow channel 50. The first adapter 41 and the second adapter 42 can rotate synchronously with the counterweight 43 to achieve stable flow of the drilling fluid provided by the first liquid supply part 1.

[0034] like Figure 4As shown, in one embodiment, through holes 430 are provided on the stacked counterweights 43, and the through holes 430 are aligned. The first water pipe 44 extends into each through hole 430 to communicate with the flow channel of the drilling tool part 5. It should be noted that each counterweight 43 has a through hole 430 extending in the axial direction, and the through holes 430 are aligned up and down. The flow channel is formed by arranging the first water pipe 44 in the through hole 430, and the first water pipe 44 is treated with glass glue to prevent water leakage in the through hole 430, forming a drainage channel of the counterweight 43.

[0035] In one embodiment, the first liquid supply part 1 includes a water storage tank 11, a first mud pump 12 and a second water pipe 13 which are connected in sequence, the second water pipe 13 is connected to the flow channel of the counterweight part 4, and the water storage tank 11 is connected to the second liquid supply part 2 through a pipeline. Optionally, the water storage tank 11 contains drilling fluid, which, under the action of the first mud pump 12, passes through the second water pipe 13 to the first water pipe 44 in the counterweight part 4, and finally flows out near the drill bit 52 and flows into the second liquid supply part 2. The second water pipe 13 is a large-diameter PVC water pipe, and the first water pipe 44 is a small-diameter PVC water pipe. The high-speed flow of drilling fluid is achieved through the first mud pump 12, the large-diameter second water pipe 13 with gradually decreasing diameter, and the small-diameter first water pipe 44 (when the flow rate is constant, the flow rate is inversely proportional to the cross-sectional area of ​​the water pipe).

[0036] like Figure 1 , Figure 3 As shown, in one embodiment, the second liquid supply part 2 includes a water reservoir 21, a second mud pump 22 and a water hose 23, one end of the water hose 23 passes through the lower bracket 60 of the support part 6 and the inlet end 81 of the well 8 in sequence and extends into the outer flow channel 60, and the other end thereof is connected with the second mud pump 22, the second mud pump 22 is placed in the water reservoir 21, the outlet end 82 of the outer flow channel 60 is connected with the water reservoir 21, the inner flow channel 50 is connected with the water reservoir 21, and the rock 7 is placed in the water reservoir. Optionally, the water reservoir 21 is a water reservoir 21 surrounded by a waterproof working surface. The second mud pump 22 transfers the rock 7 fragments in the water reservoir 21 to the outer flow channel 60 through the water hose 23. The drilling fluid impacts upward, passes through the outer flow channel 60, interacts with the outer wall of the drill collar 51, and then falls under the action of gravity, that is, after passing a certain height position in the outer flow channel 60, it falls back to the outlet end 82 of the outer flow channel 60, and finally flows into the water reservoir 21, flows into the water reservoir 21 to participate in the next circulation, and the high-speed flow of the drilling fluid is realized through the second mud pump 22.

[0037] In one embodiment, a pressure sensor 30 is provided on the outer wall of the water reservoir 21, and the rock 7 is directly opposite to the pressure sensor 30. It should be noted that a torque sensor is also provided on the outer wall of the water reservoir 21, and the pressure sensor 30 and the torque sensor are used to collect the drilling pressure and torque of the drill bit 52, respectively, and analyze the drilling energy and rock breaking efficiency through the drilling pressure and torque.

[0038] In one embodiment, it also includes a support part 6, which includes an upper support 61 and a lower support 62. The driving part 3 is arranged on the upper support 61, the well 8 and the first liquid supply part 1 are respectively arranged on the lower support 62, and the end of the drilling tool part 5 passes through the well 8 and the lower support 62 in sequence, and the lower support 62 is located above the second liquid supply part 2. Specifically, there is a limiting hole on the lower support 62, and the drill collar 51 in the drilling tool part 5 passes through the limiting hole and does not contact the limiting hole. Avoid the lower support 62 from affecting the vibration characteristics of the drilling tool part 5; when the experiment is out of control, the movement of the drill collar 51 is constrained at the limiting hole to maintain the stability of the experimental equipment and prevent the bench from overturning. The upper support 61 and the lower support 62 are connected by a connecting rod 63, and a support 64 is provided on the connecting rod 63, and the support 64 can fix the second water pipe 13.

[0039] In one embodiment, it also includes a data acquisition unit 9 and a detection unit. The data acquisition unit 9 is arranged on the support end of the second liquid supply unit 2 and is used to receive data from various sensors. A part of the detection unit is arranged on the end of the drilling tool unit 5 (that is, on the drill bit), and the other part is arranged on the lower bracket 62. The drilling pressure, torque, axial and lateral vibration acceleration of the drill collar 51 and the rotation speed of the drill collar 51 to the drill bit 52 can be received through the data acquisition unit 9. Through these data, the energy and rock breaking efficiency of drilling can be analyzed, the axial and lateral vibrations can be analyzed, and the torsional vibrations can be analyzed. The data acquisition unit 9 obtains the monitoring data of the above sensors through Bluetooth communication.

[0040] In one embodiment, the detection unit includes an acceleration sensor 53 and an angular displacement sensor 65. The acceleration sensor 53 is disposed on the end of the drilling tool 5, and the angular displacement sensor 65 is disposed on the lower bracket 62 to detect the rotation speed of the drilling tool 5. The rotation speed of the drill collar 51 in the drilling tool 5 is collected by angular displacement sensing, and the torsional acceleration is obtained in combination with the experimental time, so as to facilitate the analysis of the torsional vibration of the drilling tool 5.

[0041] Optionally, the driving part 3 includes a driving motor 31 and a spline sleeve 32, the spline sleeve 32 is sleeved on the shaft of the driving motor 31, the counterweight part 4 is sleeved at the connection between the spline sleeve 32 and the drilling tool part 5, and the driving motor 31 is arranged on the supporting part 6, so that the flow channel of the counterweight part 4 can be connected with the flow channel of the drilling tool part 5.

[0042] like Figure 6 As shown, the device of the present invention needs to be prepared as follows during the experiment:

[0043] The first step is to determine the composition of the bottom drilling tool 5 and appropriately scale it down, as well as the ratio of the drilling fluid, the type of rock 7, etc., because different bottom drilling tools 5 have different vibration characteristics under the action of drilling fluids and rocks 7 of different characteristics. Design the scaled-down drilling tool 5 according to the needs of the specific experiment, adjust the drilling fluid, and select the appropriate rock sample.

[0044] In the second step, different drilling pressures are applied to the drilling tool 5 by adjusting the number and density of the counterweights 43; different rotation speeds are applied to the drilling tool 5 by adjusting the power of the driving unit 3; the first mud pump 12 and the second mud pump 22 provide drilling fluids with different flow rates to the drilling tool 5 to conduct preliminary experiments. If the preliminary experimental results meet expectations, proceed to the third step; if the preliminary experimental results do not meet expectations, return to the first step and rearrange.

[0045] Specifically, before conducting the vibration test of the drilling tool 5, it is necessary to first conduct a preliminary experiment to verify the correctness of the design and construction of the test bench. According to the acceleration and rotation speed of the drilling tool 5 along the axial, lateral and torsional directions, the vibration intensity is calculated:

[0046]

[0047]

[0048] In the formula, a rms is the RMS acceleration of the drill bit, t d is the vibration duration, I C is the characteristic strength, and a(t) is the acceleration of the drill bit at time t. Based on this formula, the pressure and torque on the rock can be calculated to analyze whether the design of the test bench meets expectations.

[0049] The third step is to select a suitable design scheme, and after verification that it can achieve the expected purpose, formally carry out the vibration experiment of the drilling tool 5. During the experiment, if it is necessary to explore the influence of different drilling tool parts 5, drilling fluids, and rocks 7 on the vibration characteristics, return to the first step.

[0050] Specifically, after confirming that the design and construction of the rig are correct, the vibration characteristics of the drilling tool 5 can be analyzed by adjusting and measuring various drilling operation parameters:

[0051] Control and measurement of drilling pressure: By adjusting the number and density of the weights 43 , different drilling pressures are applied to the drilling tool 5 . The actual drilling pressure acting on the rock 7 can be measured by the pressure and torque sensor 30 .

[0052] Control and measurement of rotation speed and torque: By adjusting the power of the driving part 3, different rotation speeds are applied to the drilling tool part 5, and the actual torque acting on the rock 7 can be measured according to the pressure and torque sensor 30.

[0053] Control of drilling fluid flow rate and flow rate: The flow rate and flow rate of the drilling fluid can be controlled by adjusting the opening and closing degree of the flow valves of the first mud pump 12 and the second mud pump 22, or by replacing impellers of different shapes and sizes.

[0054] Through various sensors, the vibration data of the drill tool 5 along the axial, lateral and torsional directions under different operating parameters can be collected, and the vibration characteristics of the drill tool 5 under the impact of drilling fluid can be analyzed. Thus, the real drilling process can be simulated, and the impact force on the drill tool 5 during the circulation of drilling fluid can be effectively simulated. By analyzing the stress conditions of these components, the alternating stress of the drill tool 5 caused by frequent and severe vibrations can be avoided, and fatigue fracture damage of the drill tool 5 can be avoided, thereby reducing economic losses.

[0055] In summary, if Figure 5 As shown, the drilling fluid in the first liquid supply part 1 can be sequentially transported to the flow channels of the counterweight part 4 and the drill tool part 5, that is, transported to the inner flow channel 50, and finally flows to the drill bit 52 in the drill tool part 5, and flows to the second liquid supply part 2 through the drill bit 52. The drilling fluid in the second liquid supply part 2 is pumped into the outer flow channel 60, and after flowing through the outer flow channel 60 to a certain height, it flows out from the outlet end 82 of the second liquid supply part 2 into the second liquid supply part 2 due to gravity, wherein the driving part 3 drives the drill tool part 5 to rotate. Thus, the real drilling process can be simulated, and the impact force on the drill tool part 5 during the circulation of the drilling fluid can be effectively simulated. By analyzing the stress conditions of these components, the alternating stress of the drill tool part 5 caused by frequent and violent vibrations can be avoided, and fatigue fracture damage of the drill tool part 5 can be avoided, thereby reducing economic losses.

[0056] like Figure 7 As shown, the present invention also provides a drilling tool vibration test method, the method comprising:

[0057] Step S10, the first liquid supply part 11 is connected to the counterweight part 4 so that the flow channel of the counterweight part 4 and the drilling tool part 5 are connected to form an inner flow channel 50;

[0058] Step S20, the counterweight part 4 is sleeved at the connection between the driving part 3 and the drilling tool part 5, and one end of the drilling tool part 5 is located in the well 8 and passes through the well 8 to align with the rock 7;

[0059] Step S30, an outer flow channel 60 is formed according to the outer wall of the drill tool 5 and the inner wall of the well, and the fluid flows into the outer flow channel 60 through the inlet end 81 of the outer flow channel 60. The above steps can simulate the real drilling process, effectively simulate the impact force on the drill tool during the circulation of the drilling fluid, and analyze the stress conditions of each component to avoid frequent and severe vibrations that cause alternating stress in the drill tool, avoid fatigue fracture damage to the drill tool, and reduce economic losses.

[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A drilling tool vibration test device, characterized in that: include: A first liquid supply part (1), a second liquid supply part (2), a driving part (3), a counterweight part (4) and a drilling tool part (5); one end of the first liquid supply part (1) is connected to the second liquid supply part (2), and the other end is connected to the counterweight part (4) so ​​that the counterweight part (4) and the flow channel of the drilling tool part (5) are connected to form an inner flow channel (50); the counterweight part (4) is sleeved at the connection between the driving part (3) and the drilling tool part (5); one end of the drilling tool part (5) is located in the well (8) and passes through the well (8) to be aligned with the rock (7); and the counterweight part (4) is located above the well (8); the outer wall of the drilling tool part (5) and the inner wall of the well (8) form an outer flow channel (60); the inlet end (81) and the outlet end (82) of the outer flow channel (60) are both connected to the second liquid supply part (2).

2. The drilling tool vibration test device according to claim 1, characterized in that: The drilling tool part (5) comprises a drill collar (51) and a drill bit (52); one end of the drill collar (51) is connected to the driving part (3) and communicates with a flow channel of the counterweight part (4); the counterweight part (4) is sleeved at the connection between the drill collar (51) and the driving part (3); the other end of the drill collar (51) passes through the well (8) and is connected to the drill bit (52); and the outer flow channel (60) is formed between the outer wall of the drill collar (51) and the inner wall of the well (8).

3. The drilling tool vibration test device according to claim 1, characterized in that: The counterweight part (4) comprises a first water pipe (44), a first adapter (41), a second adapter (42) and a stacked counterweight block (43); one end of the first water pipe (44) is connected to the first liquid supply part (1); the other end of the first water pipe (44) passes through the first adapter (41), the second adapter (42) and the counterweight block (43) in sequence to be connected to the flow channel of the drilling tool part (5) to form the inner flow channel (50); the first adapter (41) is sleeved on the shaft of the driving part (3); the second adapter (42) and the counterweight block (43) are sleeved at the connection between the driving part (3) and the drilling tool part (5); the first adapter (41) is located above the second adapter (42); and the second adapter (42) is arranged on the counterweight block (43).

4. The drilling tool vibration test device according to claim 3, characterized in that: Through holes (430) are provided on the stacked counterweight blocks (43), and the through holes (430) are aligned. The first water pipe (44) extends into each of the through holes (430) to communicate with the flow channel of the drilling tool part (5).

5. The drilling tool vibration test device according to claim 1, characterized in that: The first liquid supply part (1) comprises a water storage tank (11), a first mud pump (12) and a second water pipe (13) which are connected in sequence, the second water pipe (13) is connected to the flow channel of the counterweight part (4), and the water storage tank (11) is connected to the second liquid supply part (2) through a pipeline.

6. The drilling tool vibration test device according to claim 1, characterized in that: The second liquid supply part (2) comprises a water reservoir (21), a second mud pump (22) and a water hose (23). One end of the water hose (23) passes through the inlet end (81) of the well (8) and extends into the outer flow channel (60). The other end of the water hose (23) is connected to the second mud pump (22). The second mud pump (22) is placed in the water reservoir (21). The outlet end (82) of the outer flow channel (60) is connected to the water reservoir (21). The inner flow channel (50) is connected to the water reservoir (21). The rock (7) is placed in the water reservoir.

7. The drilling tool vibration test device according to claim 6, characterized in that: A pressure sensor (30) is provided on the outer wall of the water reservoir (21), and the rock (7) faces the pressure sensor (30).

8. The drilling tool vibration test device according to any one of claims 1 to 7, characterized in that: The drilling tool (5) further comprises a support portion (6), wherein the support portion (6) comprises an upper support (61) and a lower support (62), wherein the driving portion (3) is arranged on the upper support (61), the well (8) and the first liquid supply portion (1) are respectively arranged on the lower support (62), and the end of the drilling tool portion (5) passes through the well (8) and the lower support (62) in sequence, and the lower support (62) is located above the second liquid supply portion (2).

9. The drilling tool vibration test device according to claim 8, characterized in that: It also comprises a data acquisition unit (9) and a detection unit connected to each other, wherein the data acquisition unit (9) is arranged on the supporting end of the second liquid supply unit (2), a part of the detection unit is arranged on the end of the drilling tool unit (5), and the other part is arranged on the lower support (62).

10. The drilling tool vibration test device according to claim 9, characterized in that: The detection unit comprises an acceleration sensor (53) and an angular displacement sensor (65); the acceleration sensor (53) is arranged on the end of the drilling tool unit (5); and the angular displacement sensor (65) is arranged on the lower bracket (62) to detect the rotation speed of the drilling tool unit (5).

11. The drilling tool vibration test device according to claim 1, characterized in that: The driving part (3) comprises a driving motor (31) and a spline sleeve (32), wherein the spline sleeve (32) is sleeved on the shaft of the driving motor (31), and the counterweight part (4) is sleeved at the connection between the spline sleeve (32) and the drilling tool part (5).

12. A drilling tool vibration test method, characterized in that: The method comprises: According to the communication between the first liquid supply part and the counterweight part, the counterweight part is connected with the flow channel of the drilling tool part to form an inner flow channel; The counterweight part is sleeved at the connection between the driving part and the drilling tool part, and one end of the drilling tool part is located in the well and passes through the well to align with the rock; An outer flow channel is formed according to the outer wall of the drilling tool part and the inner wall of the well, and the fluid flows into the outer flow channel through the inlet end of the outer flow channel.

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