Simulated condition loading system for hydraulic oscillatorTechnical Field
The invention relates to the field of petroleum drilling and production equipment, in particular to a simulated working condition loading system for a hydraulic oscillator.
Background
In the field of petroleum and natural gas production, a hydraulic oscillator is a tool for improving the rapid drilling of a horizontal well, static friction between a drill string and a well wall is converted into sliding friction through the vibration of the hydraulic oscillator so as to reduce frictional resistance, and particularly in a horizontal section of a well hole, the phenomena of pressure supporting, stick-slip, tool surface loss and the like are easy to occur, so that the drilling speed is limited, and the length of the horizontal section is restricted. Chinese patent document CN203547713U describes a pipe string vibration friction resistance reduction test device, which is provided with a simulated shaft, and drilling fluid is injected into the simulated shaft to simulate downhole conditions, but in actual conditions, the side friction resistance is not caused by the drilling fluid, and more friction comes from the well wall such as pressure support or the like or the friction between the drilling tool and the pipe string, so the friction simulated by adopting the scheme cannot feed back the actual conditions. CN 104819837a describes a performance test experimental apparatus for a hydraulic oscillator, which can fix the hydraulic oscillator by a convenient method, but this scheme is mainly used to measure the non-interference performance of the hydraulic oscillator, and cannot display the performance in actual conditions. As for more relevant documents, 201510836342.1 a hydroscillator indoor test platform, 201520743231.1 downhole hydroscillator simulation test device for drilling, 201610712621.1 vibration-type drilling tool performance test device and its use, all fail to overcome the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a simulated working condition loading system for a hydraulic oscillator, which can simulate the actual working condition of the hydraulic oscillator underground as truly as possible, thereby providing reliable feedback data for research and development of the hydraulic oscillator and optimizing design.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a simulated working condition loading system for a hydraulic oscillator comprises a pressure loading device and a downhole working condition simulation platform, wherein the pressure loading device comprises a press machine and a pressure head, and the pressure head is connected with the press machine and used for applying radial pressure to the hydraulic oscillator or a simulation rod part connected with the hydraulic oscillator;
the underground working condition simulation platform is provided with a V-shaped pressure groove, and a simulated underground medium is arranged on the inclined plane of the V-shaped pressure groove;
the hydraulic oscillator is characterized by further comprising a pressure medium supply system, wherein the pressure medium supply system comprises a main pressure pump, a liquid inlet pipe and a liquid discharge pipe, and the liquid inlet pipe and the liquid discharge pipe are respectively used for being connected with two ends of the hydraulic oscillator so as to supply pressure medium through the main pressure pump.
In a preferable scheme, the bottom of the pressure head is provided with a loading part, and the loading part is connected with the pressure head in a sliding manner.
In the preferred scheme, a torque applying device is further arranged, the torque applying device is a through-core shaft motor, a through hole is formed in the shaft of the through-core shaft motor, and a pressure medium can axially penetrate through the shaft of the through-core shaft motor;
the through-spindle motor is connected with the hydraulic oscillator through an elastic coupling to drive the hydraulic oscillator to rotate.
In a preferable scheme, a sliding seat is arranged at the bottom of the penetrating shaft motor and arranged on a sliding rail along the axial direction of the hydraulic oscillator, so that the penetrating shaft motor can slide along the sliding rail.
In the preferred scheme, a penetrating rod loading hydraulic cylinder is further arranged, a piston rod of the penetrating rod loading hydraulic cylinder is provided with a through hole, a pressure medium can axially penetrate through the piston rod of the penetrating rod loading hydraulic cylinder, and the penetrating rod loading hydraulic cylinder is arranged between the liquid inlet pipe and the penetrating shaft motor so as to apply drilling pressure to the hydraulic oscillator.
In the preferred scheme, the loading end in the cylinder body of the through rod loading hydraulic cylinder is communicated with the loading pump, and the other end in the cylinder body is provided with a spring.
In a preferred scheme, a pressurizing device is further arranged in the liquid discharge pipe, a pressurizing spring or a hydraulic cylinder is arranged in the pressurizing device, and the pressurizing device is used for applying pressure to the pressure medium to simulate the underground lifting pressure of the pressure medium.
In a preferred embodiment, the supercharging device has the following structure: a piston is arranged in the pressure cylinder, the liquid inlet is arranged at the bottom of the pressure cylinder, the liquid outlet is positioned on the side face of the pressure cylinder, the liquid outlet is at a distance from the inner bottom face of the pressure cylinder, a pressure nut is arranged at the top of the pressure cylinder, and a pressure spring is arranged between the pressure nut and the piston.
In the preferred scheme, a supporting seat is arranged below the hydraulic oscillator, the supporting seat is provided with an adjustable base, a V-shaped groove is formed in the top of the adjustable base, and a supporting roller is arranged on the inclined surface of the V-shaped groove and used for supporting the hydraulic oscillator to slide along the axial direction.
In the preferred scheme, the hydraulic-power-driven underground working condition simulation platform is further provided with a simulation rod part, the simulation rod part is connected with the hydraulic oscillator, and the simulation rod part is positioned on the underground working condition simulation platform;
the underground working condition simulation platform is further fixedly connected with a detachable reaction frame, a dynamometer is arranged on the reaction frame, and the dynamometer is in contact with the end of the simulation rod part to measure the impact force of the conduction of the simulation rod part.
According to the simulated working condition loading system for the hydraulic oscillator, the underground working condition simulation platform is adopted, the simulated underground medium and the applied pressure are utilized, the pressure is transmitted to the simulated drill head part and is used for simulating the supporting pressure generated by the supporting pressure on the drill rod, so that the actual working condition of the hydraulic oscillator can be simulated really, and effective data feedback is provided for the design of the hydraulic oscillator. The scheme of the invention can guide the further optimization of the loading structure for underground working condition simulation, thereby simplifying the structure of the loading structure. The structure of the through-core shaft motor and the through-core rod loading hydraulic cylinder can conveniently load the drilling pressure and the torque to the hydraulic oscillator, and further simulate the real working condition of the hydraulic oscillator. And the volume of the whole experimental equipment can be further reduced, and the installation and the test are convenient. The pressurizing device arranged on the liquid discharge pipe can simulate the vertical pressure born by the pressure medium during circulating lifting more truly, so that the test data is closer to the real working environment. Compared with the prior art, the method can simulate the actual working condition of the hydraulic oscillator more truly, the obtained data has greater guiding significance for the research and development of new products, and the research and development time of the hydraulic oscillator can be greatly shortened.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic cross-sectional structure diagram of the downhole condition simulation platform of the present invention.
FIG. 3 is a schematic cross-sectional view of the supporting seat of the present invention.
Fig. 4 is a schematic structural view of the supercharging device of the present invention.
Fig. 5 is a schematic structural view of the elastic coupling in the present invention.
Fig. 6 is a schematic structural view of a through-center rod-loading hydraulic cylinder according to the present invention.
In the figure: a hydraulic oscillator 1, a support base 2, anadjustable base 201, alock nut 202, asupport roller 203, an elastic coupling 3, a first connectingpipe 31, a second connectingpipe 32, afirst flange 33, asecond flange 34, anelastic body 35, a through shaft motor 4, a slide rail 5, a through rod loading hydraulic cylinder 6, a throughpiston rod 61, acylinder body 62, aspring 63, a rotary joint 7, a simulation rod part 8, a downhole working condition simulation platform 9, a "V"pressure tank 91, asimulation downhole medium 92, apressure loading device 10, apress machine 101, apressure head 102, aloading part 103, a liquid inlet pipe 11, aliquid outlet pipe 12, a pressurizingdevice 13, a pressurizingnut 131, apiston 132, a pressurizingcylinder 133, aliquid inlet 134, aliquid outlet 135, a pressurizingspring 136, a pressure medium container 14, a main pressure pump 15, a first pressure sensor 16, afirst flow meter 17, a loading pump 18, anoil tank 19, a second pressure sensor 20, a second flow meter 21, avibration sensor 22, areaction frame 23, adynamometer 24.
Detailed Description
Example 1:
as shown in fig. 1-2, a simulated condition loading system for a hydraulic oscillator includes apressure loading device 10 and a downhole condition simulation platform 9, where thepressure loading device 10 includes apress machine 101 and apressure head 102, and thepressure head 102 is connected to thepress machine 101 and is used to apply radial pressure to the hydraulic oscillator 1 or a simulation rod 8 connected to the hydraulic oscillator 1;
the underground working condition simulation platform 9 is provided with a V-shaped pressure groove 91, and a simulatedunderground medium 92 is arranged on the inclined plane of the V-shaped pressure groove 91; such as a sample of downhole material, such as granite, limestone, shale, clay, or sand, made by insertion into a "V"pressure cell 91. Thereby simulating the back pressure at different media conditions.
As shown in fig. 1, a pressure medium supply system is further provided, and the pressure medium supply system comprises a main pressure pump 15, a liquid inlet pipe 11 and aliquid outlet pipe 12, wherein the liquid inlet pipe 11 and theliquid outlet pipe 12 are respectively used for connecting with two ends of the hydraulic oscillator 1, and a rotary joint 7 is arranged at the connecting position for inputting pressure medium through the main pressure pump 15. The pressure medium comprises water or slurry, the pressure medium container 14 is used for supplying the main pressure pump 15 with the pressure medium, and the pressure medium of theliquid discharge pipe 12 is discharged into the pressure medium container 14.
Preferably, as shown in fig. 2, aloading portion 103 is disposed at the bottom of thepressure head 102, the bottom of theloading portion 103 is an inverted "V" or flat plate structure, and theloading portion 103 is slidably connected to thepressure head 102. With this structure, the reciprocating motion of the hydraulic oscillator 1 is prevented from affecting thepress head 102 and thepress machine 101. Theloading portion 103 is preferably made of a material that reduces friction, such as polytetrafluoroethylene or manganese alloy steel, so as to reduce the friction generated by rotation between the dummy rod 8 or the hydroscillator 1 and theloading portion 103.
The preferable scheme is as shown in figure 1, a torque applying device is further arranged, the torque applying device is a through-core shaft motor 4, a through hole is formed in the shaft of the through-core shaft motor, and the pressure medium can axially penetrate through the shaft of the through-core shaft motor;
the through-spindle motor is connected with the hydraulic oscillator 1 through an elastic coupling 3 to drive the hydraulic oscillator 1 to rotate. The structure of the elastic coupling 3 is as shown in fig. 5, afirst flange 33 is provided at the end of the first connectingpipe 31, asecond flange 34 is provided at the end of the second connectingpipe 32, anelastic body 35 is provided between thefirst flange 33 and thesecond flange 34, a step is further provided between the first connectingpipe 31 and the second connectingpipe 32, and a seal is provided at the position of the step. A plurality of bolts are coupled to the nuts through thefirst flange 33, theelastic body 35, and thesecond flange 34. The through elastic coupling 3 can also buffer the influence of the hydraulic oscillator 1 on the through shaft motor 4 while conveying pressure media.
Preferably, as shown in fig. 1, a sliding seat is provided at the bottom of the through-shaft motor 4, and the sliding seat is provided on a sliding rail 5 along the axial direction of the hydroscillator 1, so that the through-shaft motor 4 can slide along the sliding rail 5. With this structure, damage to the through-spindle motor 4 is avoided.
According to the preferable scheme, as shown in fig. 1, a penetrating rod loading hydraulic cylinder 6 is further arranged, a piston rod of the penetrating rod loading hydraulic cylinder 6 is provided with a through hole, a pressure medium can axially penetrate through the piston rod of the penetrating rod loading hydraulic cylinder 6, and the penetrating rod loading hydraulic cylinder 6 is arranged between a liquid inlet pipe 11 and a penetrating shaft motor 4 to apply drilling pressure to the hydraulic oscillator 1.
In a preferred scheme, as shown in fig. 6, a loading end in acylinder body 62 of the feed-through rod loading hydraulic cylinder 6 is communicated with the loading pump 18, and aspring 63 is arranged at the other end in thecylinder body 62. Or both ends of thecylinder 62 are communicated with the loading pump 18 through a pipeline, and the flow direction of the hydraulic oil is switched through an electromagnetic valve arranged on the pipeline.
In a preferred embodiment, as shown in fig. 1 and 4, a pressurizingdevice 13 is further provided in thedischarge pipe 12, a pressurizingspring 136 or a hydraulic cylinder is provided in the pressurizingdevice 13, and the pressurizingdevice 13 is used for applying pressure to the pressure medium to simulate the downhole lifting pressure of the pressure medium.
In a preferred embodiment as shown in fig. 4, thesupercharging device 13 has a structure that: apiston 132 is provided in the pressurizingcylinder 133, aliquid inlet 134 is provided at the bottom of the pressurizingcylinder 133, aliquid outlet 135 is provided at the side of the pressurizingcylinder 133, and theliquid outlet 135 is spaced apart from the inner bottom surface of the pressurizingcylinder 133. A pressurizingnut 131 is arranged at the top of the pressurizingcylinder 133, a pressurizingspring 136 is arranged between the pressurizingnut 131 and thepiston 132, and the jacking pressure of thepiston 132 can be adjusted by adjusting the pressurizingnut 131. With this configuration, the pressure consumed by the pressure medium circulating from the downhole to the surface is simulated. Preferably, a first pressure sensor 16 and afirst flow meter 17 are provided on the inlet pipe 11, and a second pressure sensor 20 and a second flow meter 21 are provided on theoutlet pipe 12, in order to detect the pressure of the pressure medium and the pressure loss of the hydraulic oscillator 1.
In a preferred scheme, as shown in fig. 1 and 3, a support seat 2 is arranged below a hydraulic oscillator 1, the support seat 2 is provided with anadjustable base 201 for adjusting the height of the support seat 2, and is provided with alock nut 202 for locking the height position, the top of theadjustable base 201 is provided with a "V" -shaped groove, and the inclined surface of the "V" -shaped groove is provided with asupport roller 203 for supporting the hydraulic oscillator 1 to slide along the axial direction.
The preferable scheme is as shown in figures 1 and 2, the underground working condition simulation device is further provided with a simulation rod part 8, the simulation rod part 8 is connected with the hydraulic oscillator 1, and the simulation rod part 8 is positioned on an underground working condition simulation platform 9; the use of the dummy rod portion 8 can prevent damage to the hydroscillator 1 during the test. The hydraulic oscillator 1 or the analog rod part 8 is provided with avibration sensor 22, and thevibration sensor 22 comprises an acceleration sensor and/or a displacement sensor. Wherein the acceleration sensor is capable of accurately measuring the oscillation frequency of thevibration sensor 22 and the displacement sensor is capable of accurately measuring the amplitude of thevibration sensor 22.
The underground working condition simulation platform 9 is also fixedly connected with adetachable reaction frame 23, adynamometer 24 is arranged on thereaction frame 23, and thedynamometer 24 is in contact with the end of the simulation rod part 8 so as to measure the conducted impact force of the simulation rod part 8.
Example 2:
as shown in figure 1, when in work, the simulated underground medium 92 is made of one or a combination of more of stones, sand and clay according to geological conditions and is fixedly arranged on the underground working condition simulation platform 9. Different pressures are applied to theloading part 103 through thepress machine 101, and the pressure supporting parameters under different geological conditions are simulated.
In the preferred scheme, as shown in figure 1, a loading pump 18 drives a penetrating rod loading hydraulic cylinder 6 to apply bit pressure to the hydraulic oscillator 1; the bit pressure is transmitted to the hydraulic oscillator 1 through a sliding through shaft motor 4 and an elastic coupling 3;
the through shaft motor 4 rotates, applies torque to the hydraulic oscillator 1 through the elastic coupling 3, and drives the hydraulic oscillator 1 to rotate;
the main pressure pump 15 conveys the pressure medium in the pressure medium container 14 to the hydraulic oscillator 1 through the rotary joint 7, the piercingpiston rod 61 of the piercing rod loading hydraulic cylinder 6, the piercing shaft motor 4 and the elastic coupling 3 to drive the simulation drill bit part 8 to reciprocate, and the pressure medium is discharged to the pressure medium container 14 after passing through the simulation drill bit part 8 and theliquid discharge pipe 12;
a second pressure sensor 20 is arranged on theliquid discharge pipe 12, the input pressure is obtained through the first pressure sensor 16, and the output pressure is obtained through the second pressure sensor 20, so that pressure loss data is obtained;
acquiring the flow rate of the pressure medium through thefirst flowmeter 17; a second flow meter 21 is preferably also provided ondrain pipe 12.
Acquiring vibration frequency, amplitude and displacement data of the hydraulic oscillator 1 through thevibration sensor 22;
detecting the vibration impact of the hydroscillator 1 by means of adetachable dynamometer 24; usually, the vibration impact of the hydraulic oscillator 1 is measured separately from the vibration frequency, amplitude and displacement data of the hydraulic oscillator 1, and the vibration frequency, amplitude and displacement data are measured first and then the vibration impact data are measured.
Preferably, as shown in fig. 1, a pressure-increasingdevice 13 is provided on thedischarge pipe 12, which simulates the bottom-hole return pressure by increasing the pressure of the returned pressure medium and evaluates the influence of the return pressure of the pressure medium on the operating pressure of the main pressure pump 15, the operating state of the hydraulic oscillator 1 and the pressure medium flow.
Through the steps, data are collected under different geological conditions and different working depths according to the working conditions of the hydraulic oscillator 1, and therefore support is provided for further research and development.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention. For the sake of brevity, all the combinations of the embodiments are not exemplified, and therefore, the technical features of the embodiments can be combined with each other to generate more technical solutions without conflict.