CN112855019A - Experimental device and method for simulating regulation and control mode of static pushing type rotary steering tool - Google Patents
Experimental device and method for simulating regulation and control mode of static pushing type rotary steering tool Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The invention provides an experimental device for simulating a regulation and control mode of a static pushing type rotary steering tool, which comprises an experimental table, a pressurizing device, a simulating device and a drill bit stress monitoring device, wherein the pressurizing device is arranged on the experimental table; the pressurizing device comprises a pressurizing hand wheel and a pressure loading plate, the simulating device comprises a simulating shaft, a simulating drill rod, a simulating rotary guiding tool, a simulating drill bit and a rock core, the simulating drill rod, the simulating rotary guiding tool and the simulating drill bit are sequentially connected, the simulating drill rod and the simulating rotary guiding tool are sleeved in the simulating shaft, the simulating drill rod penetrates through a servo motor to be connected with the pressurizing device, the drill bit stress monitoring device comprises a rotary hand wheel and a stress monitoring plate provided with a lateral force and a pressure sensor, and the simulating drill bit and the stress monitoring plate are tightly attached to the surface of the rock core. The invention also provides an experimental method for simulating the regulation and control mode of the static pushing type rotary steering tool, and provides a basis for improving the regulation and control precision of the rotary steering tool by researching the influence of each drilling parameter on the stress of the rotary steering tool.
Description
Technical Field
The invention relates to the field of mechanical experiments of petroleum drilling pipe columns, in particular to an experimental device and method for simulating a regulation and control mode of a static pushing type rotary steering tool.
Background
As a new automatic drilling technology in the current drilling technology, compared with other drilling systems, the rotary steering drilling technology has the advantages of small friction resistance, high drilling speed, high precision and strong controllability of well track in the drilling process. The rotary steering drilling technology can not only improve the drilling success rate and reduce accidents, but also reduce the drilling cost on the whole, and especially has remarkable advantages in the offshore large-displacement drilling technology. There are many commercially available rotary steerable drilling systems and various rotary steerable tools in the world, among which the working principle of the static push rotary steerable system is: under the rotation state of the drill string, the guide wing ribs on the non-rotating sleeve push against the well wall to generate a guide force, so that the drilling direction of the drill bit is controlled. In field tests, the fact that the tool surface regulation error is too large due to incomplete equivalence of the guiding force and eccentric displacement regulation is found; the method comprises the steps of giving a regulation and control instruction before a drill string rotates and then drilling, wherein the drill string rotates firstly and then is added with drilling pressure during working, and the rotation of the drill string is not considered in the lower instruction and the actual working process so that the guiding force and the eccentric displacement are redistributed to cause the actual drilling track to deviate from the designed track.
At present, because conditions are limited, full-scale experiments on the static pushing type rotary steering tool cannot be carried out indoors, although part of students adopt a static model to calculate the steering characteristics of the static pushing type rotary steering drilling tool assembly, the static model cannot reflect the dynamic influence generated in the rotary motion of the bottom drilling tool assembly, and although the dynamic theoretical model has more comprehensive factors, part of calculation parameters need to be selected by experience. Therefore, it is necessary to provide an experimental apparatus and method for simulating the regulation and control manner of the static push-type rotary steering tool, so as to study the influence rules of different bottom hole assembly structures, drilling pressures and rotation speeds on the regulation and control manner of the push-type rotary steering tool, determine the deviation between the steering force regulation and control mode and the eccentric displacement regulation and control mode, and optimize the regulation and control mode to make the drilling tool drill along the designed borehole trajectory.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an experimental device and method for simulating a regulation and control mode of a static pushing type rotary guide tool.
In order to achieve the purpose, the invention adopts the following technical scheme:
an experimental device for simulating a regulation and control mode of a static pushing type rotary steering tool is characterized by comprising an experimental table, a pressurizing device, a simulating device and a drill bit stress monitoring device;
the pressurizing device, the simulating device and the drill stress monitoring device are sequentially arranged on the top surface of the experiment table, and an adjusting device is arranged on one side of the experiment table;
the pressurizing device comprises a pressurizing hand wheel and a pressure loading plate, the pressure loading plate is arranged in the movable base, the top surface of the pressure loading plate is provided with a pressure sensor, and the bottom surface of the pressure loading plate is connected with the pressurizing hand wheel through a loading screw rod;
the simulation device comprises a simulation shaft, a simulation drill rod, a simulation rotary guide tool, a simulation drill bit and a rock core, wherein the rock core is arranged in a rock core base, one end of the simulation rotary guide tool is connected with the simulation drill bit tightly attached to the surface of the rock core, the other end of the simulation rotary guide tool is connected with the bottom end of the simulation drill rod, the simulation rotary guide tool and the outer side of the simulation drill rod are both sleeved with the simulation shaft, rotary sealing sleeves are arranged at two ends of the simulation rotary guide tool and are sealed with the simulation shaft to form a closed space, the top end of the simulation drill rod penetrates through a servo motor to be contacted with the bottom surface of a pressure loading plate;
the drill stress monitoring device comprises a rotating hand wheel and a stress monitoring plate, the stress monitoring plate is arranged in the movable base, the rotating hand wheel is connected with the top surface of the stress monitoring plate through a loading screw rod, a lateral force sensor and a pressure sensor are arranged on the bottom surface of the stress monitoring plate, and the lateral force sensor and the pressure sensor are tightly attached to the surface of the rock core;
the simulated rotary guiding tool comprises a rotary mandrel, a non-rotary sleeve and a lower main shaft short section, wing rib grooves are arranged at the middle position of the non-rotary sleeve at equal intervals along the circumferential direction, a round hole is arranged at the center of each wing rib groove, a disc spring is embedded in the round hole, wing ribs are stacked on the top of the disc spring and arranged in the wing rib grooves, inner steps of the non-rotary sleeve are arranged on the inner sides of the two ends of the non-rotary sleeve, the outer side of the simulation drill bit is provided with a thrust combined needle bearing, the thrust combined needle bearing close to the simulation drill bit is fixed between a lower main shaft short section and an inner step of a non-rotating sleeve, the thrust combined needle bearing far away from the simulation drill bit is fixed between an upper main shaft step and the inner step of the non-rotating sleeve, the bottom end of a rotating mandrel sequentially penetrates through the upper main shaft step and the thrust combined needle bearing to be connected with the top end of the lower main shaft short section, the bottom end of the lower main shaft short section is connected with the simulation drill bit, and the top end of the rotating;
the simulated shaft is provided with an eyelet corresponding to the circular hole of the rib groove of the non-rotating sleeve wing of the simulated rotating guide tool, and the displacement sensor is embedded in the eyelet and is in contact with the wing rib.
Preferably, the simulation drill pipe comprises a plurality of drill pipes, and adjacent drill pipes are connected through threads.
Preferably, the simulation shaft comprises a plurality of transparent shafts, and adjacent transparent shafts are connected through flanges.
Preferably, the simulated well bore is a thickened well bore corresponding to the position of the simulated rotary steerable tool.
Preferably, the simulated wellbore is fixed to the top surface of the experiment table through a wellbore support.
Preferably, the rib grooves on the non-rotating sleeve of the simulated rotary steerable tool are circumferentially spaced by 120 °.
An experimental method for simulating a regulation and control mode of a static push-type rotary steering tool adopts the experimental device, and specifically comprises the following steps:
step 1, a pressurizing device, a simulation device and a drill bit stress monitoring device are sequentially arranged on the top surface of a test bench along a straight line, and the height and the inclination angle of the test bench are adjusted by using a test bench adjusting device according to the inclination angle of a simulated shaft;
step 3, pushing a pressure loading plate to apply pressure to the simulated drill bit by using a loading lead screw through rotating a pressurizing hand wheel of a pressurizing device until the reading of a pressure sensor on the pressure loading plate reaches the set simulated drill bit drilling pressure;
step 6, changing the bit pressure of the simulated drill bit, setting the rest drilling parameters as initial values, and repeating the steps 3 to 5 to respectively obtain the eccentric displacement of the simulated rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the bit pressure of the simulated drill bit;
changing the rotating speed of the servo motor, setting other drilling parameters as initial values, and repeating the steps 3 to 5 to respectively obtain the eccentric displacement of the simulated rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the rotating speed of the simulated drill rod;
changing the thrust force borne by the wing rib of the simulated rotary steering tool, setting other drilling parameters as initial values, adjusting a disc spring of the simulated rotary steering tool, repeating the steps from 3 to 5, and respectively obtaining the eccentric displacement of the simulated rotary steering tool, the resultant guiding force borne by the wing rib, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the thrust force borne by the wing rib of the simulated rotary steering tool;
step 7, respectively rotating the simulated shaft by 90 degrees, 180 degrees and 270 degrees clockwise, repeating the step 6 to obtain the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs and the magnitude and direction of the lateral force borne by the simulated drill bit in different shaft directions, and respectively obtaining the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the direction of the simulated shaft;
and 8, closing the servo motor and ending the experiment.
Preferably, the number of the flexible short sections connected with the simulation drill rod and the size of the centralizer are respectively changed, the steps 3 to 5 are repeated, the eccentric displacement of the simulation rotary steering tool, the guiding resultant force borne by the wing ribs and the magnitude and direction of the lateral force borne by the simulation drill bit under different drilling tool combined structure conditions are obtained, and the change rules of the eccentric displacement of the simulation rotary steering tool, the guiding resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulation drill bit and the direction of the lateral force borne by the simulation drill bit in the drilling tool combined structure are determined.
The invention has the following beneficial technical effects:
1. the invention provides an experimental device for simulating a regulation and control mode of a static push-pull type rotary steering tool, which realizes the simulation of the actual drilling process working condition of the static push-pull type rotary steering tool by converting a complex drilling field experiment into an indoor experiment, reduces the experiment cost and has strong operability.
2. The invention provides an experimental method for simulating a regulation and control mode of a static push-type rotary steering tool, which comprehensively researches influence laws of various drilling parameters on lateral force, resultant guiding force at wing positions and deviation of eccentric displacement of a drill bit of the static push-type rotary steering tool by simulating working states of the static push-type rotary steering tool under various drilling parameter conditions, and also researches influence laws of different drill tool combination structures on lateral force, resultant guiding force at wing positions and deviation of eccentric displacement of the drill bit of the static push-type rotary steering tool by changing a drill tool combination, is favorable for determining deviation between a guide force regulation and control mode and an eccentric displacement regulation and control mode of the static push-type rotary steering tool, and provides a basis for improving regulation and control precision of the static push-type rotary steering tool.
Drawings
Fig. 1 is a schematic structural diagram of a static pushing type rotary steering tool regulation and control mode simulation experiment device.
FIG. 2 is a schematic view of a simulated rotary steerable tool according to the present invention.
FIG. 3 is a schematic structural diagram of the centralizer and the flexible short section.
In the figure, 1, a laboratory bench adjusting device, 2, a pressurizing hand wheel, 3, a pressure sensor, 4, a servo motor, 5, a rotating speed sensor, 6, a simulation shaft, 7, a simulation drill rod, 8, a shaft support, 9, a simulation rotary guiding tool, 10, a displacement sensor, 11, a thickening shaft, 12, a simulation drill bit, 13, a core base, 14, a stress monitoring plate, 15, a rotary hand wheel, 16, a rotary mandrel, 17, an upper main shaft step, 18, a thrust combination needle bearing, 19, a non-rotary sleeve, 20, a wing rib groove, 21, a non-rotary sleeve inner step, 22, a lower main shaft short section, 23, a flexible short section, 24 and a centralizer are arranged.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention discloses an experimental device for simulating a regulation and control mode of a static pushing type rotary steering tool, which comprises an experimental table, a pressurizing device, a simulating device and a drill bit stress monitoring device as shown in figure 1.
Pressure device, analogue means and drill bit atress monitoring devices set up in proper order along the straight line in the laboratory bench top surface, and laboratory bench one side is provided with adjusting device 1 that is used for adjusting the laboratory bench height and inclination, utilizes adjusting device 1 to adjust the laboratory bench angle and personally submit certain inclination with the level, realizes the simulation to the multiple work scene of static formula rotary steering instrument that leans on.
The pressurizing device comprises a pressurizing hand wheel 2 and a pressure loading plate, the pressure loading plate is arranged in the movable base, a pressure sensor 3 used for displaying loading pressure is arranged on the top surface of the pressure loading plate, the bottom surface of the pressure loading plate is connected with the pressurizing hand wheel 2 through a loading screw rod, the loading screw rod drives the pressure loading plate to move along the axial direction of the simulation drill rod, the pressure hand wheel 2 is rotated to control the loading screw rod to apply pressure to the simulation drill rod 7, and the pressure applied to the simulation drill bit is controlled.
The simulation device comprises a simulation shaft 6, a simulation drill rod 7, a simulation rotary guiding tool 9, a simulation drill bit 12 and a rock core, wherein the simulation drill rod 7 is formed by connecting a plurality of drill rods in a threaded manner, the simulation shaft 6 is formed by connecting a plurality of shaft flanges made of organic glass, the simulation shaft 6 is fixed on the top surface of the experiment table through a shaft support 8, the simulation shaft 6 is transparent and visible, an experimenter can observe the motion state of the simulation drill rod 7 in the experiment process conveniently, and in order to place the simulation rotary guiding tool 9 in a matched manner, a thickened shaft 11 with a larger inner diameter is selected for the simulation shaft 6 sleeved on the outer side of the simulation rotary guiding tool 9; the core is arranged in the core base 13 and is fixed on the top surface of the experiment table, and is used for simulating the actual stratum condition, one end of a simulation rotary guiding tool 9 is connected with a simulation drill bit 12, the other end of the simulation rotary guiding tool is connected with the bottom end of a simulation drill rod 7, the simulation drill bit 12 is tightly attached to the surface of the core, the simulation rotary guiding tool 9 and the simulation drill rod 7 are both sleeved in a simulation shaft 6, rotary sealing sleeves are arranged at two ends of the simulation rotary guiding tool 9 and are sealed with the simulation shaft 6 to form a sealed space, the top end of the simulation drill rod 7 penetrates through a servo motor 4 to be contacted with the bottom surface of a pressure loading plate, the servo motor 4 is used for driving the simulation drill rod 7 to rotate, a rotating speed sensor 5 is arranged on the simulation drill rod 7 close.
The drill bit stress monitoring device comprises a rotary hand wheel 15 and a stress monitoring plate 14; the stress monitoring plate 14 is arranged in a movable base which can be fixed on the top surface of the experiment table or can move on the top surface of the experiment table, a rotary hand wheel 15 is connected with the top surface of the stress monitoring plate 14 through a loading screw rod, a lateral force sensor and a pressure sensor are arranged on the bottom surface of the stress monitoring plate 14, the lateral force sensor and the pressure sensor are both tightly attached to the surface of a rock core and are used for measuring lateral pushing force applied by a simulation drill bit 12 in the experiment process, the simulation drill bit 12 has the characteristics of meeting the indoor experiment operation compared with an actual drilling tool, meanwhile, when the pressurizing device is damaged and cannot normally work, the drill bit stress monitoring device can be used for replacing the pressurizing device to apply pressure to the simulation drill bit 12, the rotary hand wheel 15 extrudes the loading screw rod to drive the stress monitoring plate to axially move along a simulation drill rod, and extrudes, instead of the pressurizing means, pressure is applied to the mock drill bit 12.
The simulated rotary guiding tool 9 comprises a rotary mandrel 16, a non-rotary sleeve 19 and a lower main shaft short section 22; three wing rib grooves 20 are axially arranged at the middle position of the non-rotating sleeve 19, and the circumferential spacing degrees of the wing rib grooves 20 are distributed at equal intervals and are 120 degrees; the center of the wing rib groove 20 is provided with a round hole, the disc spring is embedded in the round hole, the wing rib is placed in the wing rib groove 20 and is tightly attached to the top of the disc spring, the disc spring is adopted to replace a hydraulic unit to apply pushing force, different pushing force is applied by replacing a disc spring combination, the requirement that different pushing force is applied by the simulated rotary guiding tool 9 is met, and the effect of applying the pushing force by replacing the hydraulic device is realized while the complex hydraulic device is simplified by the disc spring; the inner sides of two ends of the non-rotating sleeve 19 are provided with non-rotating sleeve inner steps 21, the outer sides of the two ends of the non-rotating sleeve 19 are provided with thrust combined needle roller bearings 18, the thrust combined needle roller bearings 18 meet the axial load required in the experimental process and are used for isolating the relative motion of the rotating mandrel 16 and the non-rotating sleeve 19, so that when the rotating mandrel 16 is driven by the simulation drill rod 7 to rotate, the non-rotating sleeve 19 keeps the original state and does not rotate along with the rotating mandrel 16, meanwhile, the thrust combined needle roller bearing 18 close to one end of the simulation drill bit 12 is fixed between the lower main shaft short section 22 and the non-rotating sleeve inner steps 21, the thrust combined needle roller bearing 18 far away from one end of the simulation drill bit 12 is fixed between the upper main shaft step 17 and the non-rotating sleeve inner steps 21, the bottom end of the rotating mandrel 16 sequentially penetrates through the upper main shaft step 17 and the thrust combined needle roller bearings 18, the upper main shaft step 17 prevents the thrust combined needle roller bearing 18 from sliding along with the rotation of the rotating mandrel 16, and the inner step 21 of the non-rotating sleeve prevents the thrust combined needle roller bearing 18 from sliding to the inner side of the non-rotating sleeve 19 along the rotating mandrel 16; the bottom end of the lower main shaft short section 22 is connected with the simulation drill bit 12, the top end of the rotary mandrel 16 is connected with the simulation drill rod 7 sequentially through the centralizer 24 and the flexible short section 23, the centralizer 24 and the flexible short section 23 are in threaded connection with the simulation drill rod 7, the disassembly and the replacement are convenient, the maintenance and the reutilization of an experimental device are facilitated, and the experimental cost is saved.
The simulated shaft 6 is provided with holes corresponding to the round holes of the 19 wing rib grooves 20 of the non-rotating sleeve of the simulated rotating guide tool 9, in the embodiment, the simulated shaft 6 is provided with three holes, the positions of the holes correspond to the positions of the round holes of the 20 round holes of the 19 wing rib grooves of the non-rotating sleeve of the simulated rotating guide tool 9, the holes are embedded with contact type displacement sensors 10, and the contact type displacement sensors 10 are tightly attached to the wing ribs of the simulated rotating guide tool 9 and used for measuring the radial displacement of the wing ribs of the simulated rotating guide tool 9 in the experimental process.
The invention also provides an experimental method for simulating the regulation and control mode of the static pushing type rotary guiding tool, and the experimental device for simulating the regulation and control mode of the static pushing type rotary guiding tool comprises the following steps:
step 1, a pressurizing device, a simulation device and a drill bit stress monitoring device are sequentially arranged on the top surface of a test bench along a straight line, and the height and the inclination angle of the test bench are adjusted by using a test bench adjusting device 1 according to the inclination angle of a simulated shaft;
step 3, pushing a pressure loading plate to apply pressure to the simulated drill bit 12 by using a loading lead screw through rotating a pressurizing hand wheel 2 of the pressurizing device until the reading of a pressure sensor 3 on the pressure loading plate reaches the set simulated drill bit drilling pressure;
step 6, changing the bit pressure of the simulated drill bit 12, setting the rest drilling parameters as initial values, and repeating the steps 3 to 5 to respectively obtain the eccentric displacement of the simulated rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the bit pressure of the simulated drill bit;
changing the rotating speed of the servo motor 4, setting other drilling parameters as initial values, and repeating the steps 3 to 5 to respectively obtain the eccentric displacement of the simulated rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the rotating speed of the simulated drill rod;
changing the thrust force borne by the wing rib of the simulated rotary guiding tool 9, setting other drilling parameters as initial values, adjusting the disc spring of the simulated rotary guiding tool 9, repeating the steps 3 to 5, and respectively obtaining the eccentric displacement of the simulated rotary guiding tool, the resultant guiding force borne by the wing rib, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the thrust force borne by the wing rib of the simulated rotary guiding tool;
step 7, respectively rotating the simulated shaft 6 by 90 degrees, 180 degrees and 270 degrees clockwise, repeating the step 6 to obtain the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs and the magnitude and direction of the lateral force borne by the simulated drill bit in different shaft directions, and respectively obtaining the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the direction of the simulated shaft;
and 8, closing the servo motor 4 and ending the experiment.
Meanwhile, the method also comprises the step 3 to the step 5 by changing the number of the flexible short sections 23 connected with the simulation drill rod 7 and the size of the centralizer 24, so that the eccentric displacement of the simulation rotary steering tool, the guiding resultant force borne by the wing ribs and the magnitude and the direction of the lateral force borne by the simulation drill bit under different drilling tool combined structure conditions are obtained, and the change rule of the eccentric displacement of the simulation rotary steering tool, the guiding resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulation drill bit and the change rule of the direction of the lateral force borne by the simulation drill bit along with the drilling tool combined structure are determined.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. An experimental device for simulating a regulation and control mode of a static pushing type rotary steering tool is characterized by comprising an experimental table, a pressurizing device, a simulating device and a drill bit stress monitoring device;
the pressurizing device, the simulating device and the drill bit stress monitoring device are sequentially arranged on the top surface of the experiment table, and one side of the experiment table is provided with the adjusting device (1);
the pressurizing device comprises a pressurizing hand wheel (2) and a pressure loading plate, the pressure loading plate is arranged in the movable base, the top surface of the pressure loading plate is provided with a pressure sensor (3), and the bottom surface of the pressure loading plate is connected with the pressurizing hand wheel (2) through a loading screw rod;
the simulation device comprises a simulation shaft (6), a simulation drill rod (7), a simulation rotary guide tool (9), a simulation drill bit (12) and a rock core, wherein the rock core is arranged in a rock core base (13), one end of the simulation rotary guide tool (9) is connected with the simulation drill bit (12) tightly attached to the surface of the rock core, the other end of the simulation rotary guide tool is connected with the bottom end of the simulation drill rod (7), the simulation shaft (6) is sleeved on the outer sides of the simulation rotary guide tool (9) and the simulation drill rod (7), rotary sealing sleeves are arranged at two ends of the simulation rotary guide tool (9), the simulation drill pipe is sealed with a simulation shaft (6) to form a closed space, the top end of a simulation drill pipe (7) penetrates through a servo motor (4) to be in contact with the bottom surface of a pressure loading plate, the servo motor (4) drives the simulation drill pipe (7) to rotate, and a rotating speed sensor (5) is arranged on one side, close to the servo motor (4), of the simulation drill pipe (7);
the drill stress monitoring device comprises a rotary hand wheel (15) and a stress monitoring plate (14), the stress monitoring plate (14) is arranged in a movable base, the rotary hand wheel (15) is connected with the top surface of the stress monitoring plate (14) through a loading screw rod, a lateral force sensor and a pressure sensor are arranged on the bottom surface of the stress monitoring plate (14), and the lateral force sensor and the pressure sensor are tightly attached to the surface of a rock core;
the simulated rotary guiding tool (9) comprises a rotary mandrel (16), a non-rotary sleeve (19) and a lower main shaft short section (22), wing rib grooves (20) are arranged at the middle position of the non-rotary sleeve (19) at equal intervals along the circumferential direction, a round hole is formed in the center of each wing rib groove (20), a disc spring is embedded in the round hole, wing ribs are stacked on the top of the disc spring and arranged in the wing rib grooves (20), non-rotary sleeve inner steps (21) are arranged on the inner sides of two ends of the non-rotary sleeve (19), thrust combined needle bearings (18) are arranged on the outer sides of the non-rotary sleeve (20), the thrust combined needle bearings (18) close to the simulated drill bit (12) are fixed between the lower main shaft short section (22) and the non-rotary sleeve inner steps (21), the thrust combined needle bearings (18) far away from the simulated drill bit (12) are fixed between the upper main shaft step (17) and the non-rotary sleeve inner steps (21), and the bottom end of the rotary mandrel (16) sequentially penetrates The bottom end of a lower main shaft short section (22) is connected with a simulation drill bit (12), and the top end of a rotary mandrel (16) is connected with a simulation drill rod (7) through a centralizer (24) and a flexible short section (23) in sequence;
and a hole is formed in the position, corresponding to a circular hole of a wing rib groove (20) of a non-rotating sleeve (19) of the simulated rotating guide tool, of the simulated shaft (6), and the displacement sensor (10) is embedded in the hole and is in contact with a wing rib.
2. The experimental device for simulating the regulation and control mode of the static push-type rotary steering tool as claimed in claim 1, wherein the simulation drill rod (7) comprises a plurality of drill rods, and the adjacent drill rods are connected through threads.
3. The experimental facility for simulating the regulation and control of a static push-against rotary steerable tool according to claim 1, characterized in that the simulated wellbore (6) comprises a plurality of transparent wellbores, and adjacent transparent wellbores are connected by flanges.
4. The experimental facility for simulating the regulation and control of a static push-against rotary steerable tool according to claim 3, characterized in that the simulated wellbore (6) is a thickened wellbore (11) at the location corresponding to the simulated rotary steerable tool (9).
5. The experimental facility for simulating the manipulation of a static push-against rotary steerable tool according to claim 1, characterized in that the simulated wellbore (6) is fixed to the top surface of the laboratory bench by a wellbore support (8).
6. The experimental device for simulating the regulation and control mode of the static push-pull type rotary steerable tool according to claim 1, characterized in that the circumferential spacing degrees of the wing rib grooves (20) on the non-rotary sleeve (19) of the simulated rotary steerable tool (9) are 120 degrees.
7. An experimental method for simulating a regulation and control mode of a static push-type rotary steering tool, which is characterized in that the experimental device of claim 1 is adopted, and the experimental method specifically comprises the following steps:
step 1, a pressurizing device, a simulation device and a drill bit stress monitoring device are sequentially arranged on the top surface of a test bench along a straight line, and the height and the inclination angle of the test bench are adjusted by using a test bench adjusting device (1) according to the inclination angle of a simulated shaft;
step 2, adjusting the position of a displacement sensor (10) in the hole of the simulated shaft (6) to enable the displacement sensor to be tightly attached to a wing rib of the simulated rotary guiding tool (9), measuring the initial radial displacement of the wing rib of the simulated rotary guiding tool (9) by using the displacement sensor (10), setting the simulated drill bit drilling pressure, the simulated drill rod rotating speed and the thrust force borne by the wing rib of the simulated rotary guiding tool as drilling parameters, and setting the simulated drill bit drilling pressure, the simulated drill rod rotating speed and the initial value of the thrust force borne by the wing rib of the simulated rotary guiding tool;
step 3, pushing a pressure loading plate to apply pressure to the simulated drill bit (12) by using a loading lead screw through rotating a pressurizing hand wheel (2) of the pressurizing device until the reading of a pressure sensor (3) on the pressure loading plate reaches the set simulated drill bit pressure;
step 4, starting the servo motor (4), driving the simulation drill rod (7) and the simulation rotary guiding tool rotary mandrel (16) to rotate, and adjusting the rotating speeds of the simulation drill rod (7) and the simulation rotary guiding tool rotary mandrel (16) according to the reading of the rotating speed sensor (5);
step 5, in the rotating process of the simulation drill rod (7) and the rotary mandrel (16) of the simulation rotary guiding tool, measuring by using a lateral force sensor on a stress monitoring plate (14) of a drill stress monitoring device to obtain the magnitude and the direction of the lateral force borne by the simulation drill (12), measuring the radial displacement of the wing rib of the simulation rotary guiding tool (9) at the moment by using a displacement sensor (10), obtaining the eccentric displacement of the simulation rotary guiding tool by combining the initial radial displacement of the wing rib, and determining the guiding resultant force borne by the wing rib based on the eccentric displacement of the simulation rotary guiding tool;
step 6, changing the bit pressure of the simulation drill bit (12), setting other drilling parameters as initial values, repeating the steps 3 to 5, and respectively obtaining the eccentric displacement of the simulation rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulation drill bit and the change rule of the direction of the lateral force borne by the simulation drill bit along with the bit pressure of the simulation drill bit;
changing the rotating speed of the servo motor (4), setting other drilling parameters as initial values, and repeating the steps 3 to 5 to respectively obtain the eccentric displacement of the simulated rotary steering tool, the steering resultant force borne by the wing ribs, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the rotating speed of the simulated drill rod;
changing the thrust force borne by the wing rib of the simulated rotary guiding tool (9), setting other drilling parameters as initial values, adjusting a disc spring of the simulated rotary guiding tool (9), repeating the steps 3 to 5, and respectively obtaining the eccentric displacement of the simulated rotary guiding tool, the resultant guiding force borne by the wing rib, the magnitude of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the thrust force borne by the wing rib of the simulated rotary guiding tool;
step 7, respectively rotating the simulated shaft (6) by 90 degrees, 180 degrees and 270 degrees clockwise, repeating the step 6 to obtain the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs and the size and direction of the lateral force borne by the simulated drill bit in different shaft directions, and respectively obtaining the eccentric displacement of the simulated rotary steering tool, the guiding resultant force borne by the wing ribs, the size of the lateral force borne by the simulated drill bit and the change rule of the direction of the lateral force borne by the simulated drill bit along with the direction of the simulated shaft;
and 8, closing the servo motor (4) and ending the experiment.
8. The experimental method for simulating the regulation and control mode of the static push-pull type rotary steerable tool according to claim 7, characterized in that the number of the flexible short sections (23) connected with the simulation drill rod (7) and the size of the centralizer (24) are respectively changed, and the steps 3 to 5 are repeated to obtain the eccentric displacement of the simulation rotary steerable tool, the resultant guiding force applied to the wing ribs and the magnitude and direction of the lateral force applied to the simulation drill bit under different drilling tool composite structure conditions, and determine the change rules of the eccentric displacement of the simulation rotary steerable tool, the resultant guiding force applied to the wing ribs, the magnitude of the lateral force applied to the simulation drill bit and the direction of the lateral force applied to the simulation drill bit along with the drilling tool composite structure.
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