CN112943096A - Screw drilling tool anti-torque damper - Google Patents
Screw drilling tool anti-torque damper Download PDFInfo
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- CN112943096A CN112943096A CN202110261159.9A CN202110261159A CN112943096A CN 112943096 A CN112943096 A CN 112943096A CN 202110261159 A CN202110261159 A CN 202110261159A CN 112943096 A CN112943096 A CN 112943096A
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- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 238000013016 damping Methods 0.000 claims abstract description 129
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/006—Mechanical motion converting means, e.g. reduction gearings
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of oil and gas drilling, in particular to a screw drill reaction torque damper. The device is characterized in that the lower end of an upper rotary joint is inserted into an assembly shell, the lower end of the assembly shell is in threaded connection with a lower joint, the inner wall of the lower end of the upper rotary joint is in threaded connection with a central damping torsion bar, a plurality of sliding grooves are axially and uniformly distributed on the outer wall of the upper part of the central damping torsion bar, and the outer wall of the central damping torsion bar at the lower end of each sliding groove is in a polyhedral shape. The invention realizes that other upper drilling tools can normally rotate except the wireless measurement while drilling instrument and the screw drilling tool do not rotate in the directional drilling process, and can ensure that the unstably changed screw reaction torque can be effectively controlled by the invention, so that the directional technology of the screw drilling tool is greatly leaped, the drilling cost is greatly reduced, the underground accidents are reduced, the drilling capability is extended, and the drilling technology is promoted to be developed to a higher technical field.
Description
The technical field is as follows:
the invention relates to the technical field of oil and gas drilling, in particular to a screw drill reaction torque damper.
Background art:
at present, in petroleum and natural gas drilling, a screw drill is still used as a main technical means for directional drilling. In recent years, although the rotary steering drilling system is developed rapidly, the cost is high, the technical operation difficulty is high, once the well is fallen, the economic loss is serious, and the like, the rotary steering drilling system is still not suitable for large-scale popularization and application. The most important defect of the existing commonly used screw drilling tool orientation technology is that in the orientation process, a drilling tool in the whole borehole can not rotate and can only slide to drill, so that the problems of difficult downward placement of the drilling tool, slow mechanical drilling speed, poor rock debris carrying effect, unsmooth borehole and the like are caused. Over a decade ago, the idea or solution of not rotating the screw drill and Measurement While Drilling (MWD) tool during screw orientation, but other downhole tools, has been proposed in an attempt to eliminate or solve the above-mentioned problems. However, since a reactive torque which changes with the change of the bit pressure and the change of the drilling fluid displacement always exist in the working process of the screw drill, the elimination or balance of the dynamically changed reactive torque becomes a key point or core technology for solving the technology. However, the magnitude of the reaction torque of the screw drill is different according to the level and the character of an operator, well type and well condition, tool manufacturer and model, and the reaction torque is influenced by variable factors which cannot be uniformly controlled. Therefore, the problem is not effectively solved all the time, and the directional drilling technology of the screw drill still stays at the original state and level.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a screw drill tool counter-torque damper, which realizes that other upper drilling tools can normally rotate except a wireless measurement while drilling instrument and a screw drill tool do not rotate in the directional drilling process, and can ensure that the unstably changed screw tool counter-torque can be effectively controlled by the damper, so that the screw drill tool directional technology is greatly improved, the drilling cost is greatly reduced, underground accidents are reduced, the drilling capacity is extended, and the drilling technology is promoted to be developed to a higher technical field. The defect that the existing screw drill in the orientation technology of the screw drill is difficult to balance due to the inherent reaction torque is overcome.
The technical scheme adopted by the invention is as follows: a screw drilling tool anti-torque damper comprises an upper rotary joint, an assembly shell and a lower joint; the lower end of the upper rotary joint is inserted into the assembly shell, the lower end of the assembly shell is in threaded connection with a lower joint, the inner wall of the lower end of the upper rotary joint is in threaded connection with a central damping torsion bar, a plurality of sliding grooves are axially and uniformly distributed on the outer wall of the upper part of the central damping torsion bar, and the outer wall of the central damping torsion bar at the lower end of each sliding groove is in a polyhedral shape;
a pressurizing thrust bearing is arranged between the outer wall of the upper part of the central damping torsion bar and the inner wall of the assembly shell, the inner wall of the assembly shell is connected with an upper anti-torque damping fixed block in a threaded manner, the bottom surface of the upper anti-torque damping fixed block is provided with a plurality of spiral arc grooves I which are equal in length and are connected end to end, the lower end of the upper anti-torque damping fixed block is provided with an upper anti-torque damping power block, the upper end surface of the upper anti-torque damping power block is provided with a plurality of spiral arc grooves II which are the same in number and shape as the spiral arc grooves I on the bottom surface of the upper anti-torque damping fixed block, damping balls are arranged between the spiral arc grooves I and the spiral arc grooves II, the upper anti-torque damping power block is symmetrically provided with a plurality of pre-tightening notches in the circumferential direction, pre-tightening spring fixing, the lower end of the pre-tightening spring is provided with a pre-tightening spring ball seat, the bottom end of the pre-tightening spring ball seat is provided with a pre-tightening ball, and the pre-tightening ball extends out of the pre-tightening notch under the action of the spring force of the pre-tightening spring and is arranged in the chute;
the lower end of the upper anti-torque damping power block is provided with a torque thrust bearing, the torque thrust bearing is installed between the outer wall of the central damping torsion bar and the inner wall of the assembly shell, the lower end of the torque thrust bearing is provided with a follow-up cushion block on the damping spring, the lower end of the follow-up cushion block on the damping spring is connected with the damping spring, the lower end of the damping spring is connected with the lower anti-torque friction power block, the follow-up cushion block on the damping spring and the inner wall of the lower anti-torque friction power block are both designed to be in an inner polyhedral shape matched with the polyhedral outer wall of the central damping torsion bar, the lower end of the lower anti-torque friction power block is provided with a lower anti-torque friction fixed block, the lower anti-torque friction fixed block is in threaded connection with the lower connecting joint, the bottom.
The inner wall of the assembly shell is sealed with the outer wall of the upper connecting rotary joint through a sealing ring, and the lower reaction torque friction fixing block is sleeved on the central damping torsion bar and is sealed with the central damping torsion bar through the sealing ring.
The cross section of the sliding groove is a circular arc surface, the radius of the circular arc surface is the same as that of the pre-tightening ball, the number of the sliding grooves is 12-32, and the groove depth of the sliding groove is 2-5 mm.
The polyhedral outer wall of the central damping torsion bar is a hexagonal outer wall.
The outer end face of the bottom ring of the pressurizing thrust bearing is in close fit with the inner wall face of the assembly shell, the inner end face of the bottom ring of the pressurizing thrust bearing is in clearance fit with the outer wall face of the central damping torsion bar, the outer end face of the top ring of the pressurizing thrust bearing is in clearance fit with the inner wall face of the assembly shell, and the inner end face of the top ring of the pressurizing thrust bearing is in close fit with the outer wall face of the central damping torsion bar.
2-4 cooling grooves are arranged on the upper end surface of the lower reaction torque friction fixing block.
Go up anti-torque damping fixed block bottom surface and set up 4 spiral cambered surface grooves I, the cross section radius of this spiral cambered surface groove I is the same with damping ball radius, and this spiral cambered surface groove I revolves to being the levogyration, and the pitch of 4 spiral cambered surface grooves I is the same.
Go up anti-torque damping power piece circumference symmetry and be equipped with 6 pretension notches, every pretension notch internal axial is provided with 2 pretension spring fixed screw holes.
The top end face of the pre-tightening spring fixing sleeve is provided with a hexagonal hole.
The invention has the beneficial effects that: the invention realizes that other upper drilling tools can normally rotate except the wireless measurement while drilling instrument and the screw drilling tool do not rotate in the directional drilling process, and can ensure that the unstably changed screw reaction torque can be effectively controlled by the invention, so that the directional technology of the screw drilling tool is greatly leaped, the drilling cost is greatly reduced, the underground accidents are reduced, the drilling capability is extended, and the drilling technology is promoted to be developed to a higher technical field.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a structural schematic diagram of a central damping torsion bar.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a sectional view taken along line B-B of fig. 2.
Fig. 5 is a schematic structural diagram of an upper anti-torque damping fixed block and an upper anti-torque damping power block.
Fig. 6 is a cross-sectional view taken along line C-C of fig. 5.
Fig. 7 is a structural schematic diagram of an upper anti-torque damping fixing block.
Fig. 8 is a structural schematic diagram of a spiral cambered surface groove I of an upper anti-torque damping fixed block.
FIG. 9 is a schematic structural diagram of an upper anti-torque damping power block.
FIG. 10 is a structural schematic diagram of a spiral cambered surface groove II of the upper anti-torque damping power block.
FIG. 11 is a schematic cross-sectional view of a follower pad on a damping spring.
FIG. 12 is a cross-sectional schematic view of a lower anti-torque friction power block.
FIG. 13 is a cross-sectional view of a lower anti-torque friction mount.
Fig. 14 is a cross-sectional view taken along line D-D of fig. 13.
The specific implementation mode is as follows:
as shown in fig. 1, 2, 3 and 4, a screw drill anti-torque damper comprises an upper rotary joint 1, an assembly shell 2 and a lower joint 3; the lower end of an upper rotary joint 1 is inserted into an assembly shell 2, the upper rotary joint 1 is in clearance fit with the assembly shell 2 and can rotate, the upper rotary joint 1 and the assembly shell 2 form sealing through a Y-shaped sealing ring, the lower end of the assembly shell 2 is in threaded connection with a lower joint 3, the inner wall of the lower end of the upper rotary joint 1 is in threaded connection with a central damping torsion bar 4, a plurality of sliding grooves 19 are axially and uniformly distributed on the outer wall of the upper part of the central damping torsion bar 4, and the outer wall of the central damping torsion bar 4 at the lower end of the;
as shown in fig. 5, 6, 7, 8, 9 and 10, a pressurizing thrust bearing 9 is installed between the outer wall of the upper part of a central damping torsion bar 4 and the inner wall of an assembly shell 2, the inner wall of the assembly shell 2 is connected with an upper anti-torque damping fixed block 6 in a threaded manner, a plurality of spiral cambered surface grooves I20 which are equal in length and are connected end to end are arranged on the bottom surface of the upper anti-torque damping fixed block 6, an upper anti-torque damping power block 7 is arranged at the lower end of the upper anti-torque damping fixed block 6, spiral cambered surface grooves II 21 which are the same as the spiral cambered surface grooves I20 on the bottom surface of the upper anti-torque damping fixed block 6 in number and shape are arranged on the upper end surface of the upper anti-torque damping power block 7, damping balls 18 are arranged between the spiral cambered surface grooves I20 and the spiral cambered surface grooves II 21, a plurality of pre-tightening notches are symmetrically arranged in the circumferential direction of the upper anti-torque damping power block 7, a pre-tightening spring 15 is arranged in the pre-tightening spring fixing sleeve 14, a pre-tightening spring ball seat 16 is arranged at the lower end of the pre-tightening spring 15, a pre-tightening ball 17 is arranged at the bottom end of the pre-tightening spring ball seat 16, and the pre-tightening ball 17 extends out of a pre-tightening notch under the action of the spring force of the pre-tightening spring 15 and is arranged in the sliding chute;
as shown in fig. 11, 12, 13 and 14, the lower end of the upper anti-torque damping power block 7 is provided with a torque thrust bearing 8, the torque thrust bearing 8 is installed between the outer wall of the central damping torsion bar 4 and the inner wall of the assembly housing 2, the lower end of the torque thrust bearing 8 is provided with a damping spring upper follow-up pad 10, the lower end of the damping spring upper follow-up pad 10 is connected with a damping spring 11, the lower end of the damping spring 11 is connected with a lower anti-torque friction power block 12, the inner walls of the damping spring upper follow-up pad 10 and the lower anti-torque friction power block 12 are both designed into inner polyhedral shapes matched with the polyhedral outer wall of the central damping torsion bar 4, the damping spring upper follow-up pad 10 and the lower anti-torque friction power block 12 can slide up and down along the central damping torsion bar 4 and can rotate synchronously with the central damping torsion bar 4, the lower anti-torque friction power block 12 is provided with a lower anti-torque, the lower anti-torque friction fixing block 13 is inserted on a smooth cylindrical surface at the lower end of the central damping rod torsion 4, a Y-shaped sealing groove is formed in the inner surface of the lower anti-torque friction fixing block 13 and is sealed with the central damping torsion rod 4 through a Y-shaped sealing ring, the lower anti-torque friction fixing block 13 and the central damping rod torsion 4 can rotate but can also form rotary sealing, the bottom end of the central damping torsion rod 4 is connected with the lower anti-drop nut 5, and the lower anti-drop nut 5 is limited by the lower end surface of the lower anti-torque friction fixing block 13 and the inner wall step surface of the lower connecting joint 3.
The cross section of the sliding groove 19 is a circular arc surface, the radius of the circular arc surface is the same as that of the pre-tightening ball 17, the number of the sliding grooves 19 is 12-32, and the groove depth of the sliding grooves 19 is 2-5 mm.
The polyhedral outer wall of the central damping torsion bar 4 is a hexagonal outer wall.
The outer end face of the bottom ring of the pressurizing thrust bearing 9 is in close fit with the inner wall face of the assembly shell 2, the inner end face of the bottom ring of the pressurizing thrust bearing 9 is in clearance fit with the outer wall face of the central damping torsion bar 4, the outer end face of the top ring of the pressurizing thrust bearing 9 is in clearance fit with the inner wall face of the assembly shell 2, and the inner end face of the top ring of the pressurizing thrust bearing 9 is in close fit with the outer wall face of the central damping torsion bar 4.
2-4 cooling grooves 22 are arranged on the upper end face of the lower reactive torque friction fixed block 13, so that overheating and damage during rotary friction are prevented, and frictional contact matching is formed between the upper end face of the lower reactive torque friction fixed block and the lower end face of the reactive torque friction power block 12.
Go up 6 bottoms of anti-torque damping fixed block and set up 4 spiral cambered surface grooves I20, the cross section radius of this spiral cambered surface groove I20 is the same with 18 radiuses of damping ball, and this spiral cambered surface groove I20 revolves to being the levogyration, and the pitch of 4 spiral cambered surface grooves I20 is the same.
Go up 7 circumference symmetries of anti-torque damping power piece and be equipped with 6 pretension notches, every pretension notch internal axial is provided with 2 pretension spring fixed screw holes.
The top end face of the pre-tightening spring fixing sleeve 14 is provided with a hexagonal hole. The pre-tightening spring fixing sleeve 14 can be screwed into the pre-tightening spring fixing threaded hole of the upper anti-torque damping power block 7 by rotating the hexagonal hole. The pretensioning balls 17 are in surface contact with the grooves 19 on the central damping torsion bar 4, the contact force being determined by the geometry of the pretensioning spring 15 and the thickness of the pretensioning spring ball seat 16.
When the drill bit is used, the male thread at the lower end of the lower joint 3 is connected with a non-rotating drilling tool part in directional drilling (namely, an infinite measurement while drilling instrument, a screw drilling tool and a drill bit), and the female thread on the upper rotary joint 1 at the upper end of the drill bit is connected with an upper drilling tool which needs to rotate in the directional drilling.
And before directional drilling begins, a drilling mud pump is started to circulate. At the moment, under the hydraulic action of drilling fluid, the rotor of the screw drill starts to rotate in a clockwise direction (namely, right-handed rotation), and meanwhile, a stator part (a shell part) of the screw drill is also subjected to a reaction force with equal magnitude and opposite direction, so that the screw shell is driven to rotate in a counterclockwise direction (namely, left-handed rotation), and the reaction force of the reverse rotation is called as a reaction torque force. The reaction torque is uploaded to the wireless measurement-while-drilling instrument and the device, and the wireless measurement-while-drilling instrument and the device are driven to synchronously rotate in the same direction. Once a model and specification of a progressive cavity drill, bit type, and drilling fluid displacement are fixed, the magnitude of this reactive torque force is related only to the weight on bit applied to the bit, i.e., the greater the weight on bit, the greater the reactive torque.
The assembly shell 2 starts to rotate leftwards under the action of the counter torque, and simultaneously drives the upper counter torque damping fixed block 6 to synchronously rotate, the damping ball 18 in the spiral arc surface groove I20 on the bottom surface of the upper counter torque damping fixed block 6 starts to roll along the groove, and the spiral arc surface groove I20 is spiral, so that once the damping ball 18 starts to roll, a downward pressure is generated and is transmitted to the upper counter torque damping power block 7, the torque thrust bearing 8, the follow-up cushion block 10 on the damping spring and the damping spring 11 below, the pressure is transmitted to the lower counter torque friction power block 12 and the lower counter torque friction fixed block 13 through the damping spring 11, and the lower counter torque friction fixed block 13 is fixed on the lower joint 3, so that the force is finally converted into a system internal force, and the system automatically counteracts. Obviously, under the condition that the central damping torsion bar 4 is not moved, the larger the rotation angle of the assembly housing 2 is, the longer the rolling distance of the damping ball 18 along the spiral cambered groove i 20 is, or the higher the climbing height of the damping ball 18 is, the larger the generated downward displacement is, the larger the compression distance to the damping spring 11 is, and the larger the elastic force generated by the damping spring 11 to the two ends is. When the reaction torque value reaches the maximum value, the compression distance of the damping spring 11 also reaches the maximum compression amount, and the elastic force also reaches the maximum value. Conversely, the reaction torque value is reduced, and the elastic force is also reduced. This process is a process that is constantly changing dynamically as weight on bit changes. The function of offsetting the reaction torque force of the screw drill by the elastic force (compression force) of the spring is realized. Therefore, the purpose that the screw drill cannot be continuously reversed after being reversed to a certain position is achieved, and the relatively stable state of the directional tool surface of the screw drill is ensured.
In this process, the above-mentioned object is achieved and the screw drill is relatively stable in the orientation tool face in order to ensure that the upper drill is rotated. A pre-tightening spring fixing sleeve 14, a pre-tightening spring 15, a pre-tightening spring ball seat 16 and a pre-tightening ball 17 are installed in the upper anti-torque damping power block 7, a pre-tightening force is given in advance during installation, the force ensures that the damping ball 18 and a spiral arc surface groove II 21 of the upper anti-torque damping power block 7 can roll relatively without generating a follow-up phenomenon, and simultaneously the force ensures that the pre-tightening ball 17 can roll smoothly between adjacent sliding grooves 19 on the central damping torsion bar 4 when the central damping torsion bar rotates, and the clamping phenomenon cannot be caused. Under the installation premise, when the upper rotary joint 1 is rotated, the central damping torsion bar 4, the top ring of the pressurizing thrust bearing 9, the bottom ring of the torque thrust bearing 8, the follow-up cushion block 10 on the damping spring, the damping spring 11, the lower anti-torque friction power block 12 and the lower anti-falling cap 5 also rotate along with the rotation. As described above, the pre-tightening balls 17 between the upper anti-torque damping power block 7 and the central damping torsion bar 4 can only roll along the circumferential direction of the sliding grooves 19 on the central damping torsion bar 4, and the pre-tightening rolling friction force cannot drive the upper anti-torque damping power block 7 to synchronously rotate. The lower reaction torque friction power block 12 is in surface contact with the lower reaction torque friction fixed block 13, and the spring elastic force converted from the reaction torque force of the screw drill is completely acted between the lower reaction torque friction power block and the lower reaction torque friction fixed block, and the friction force between the lower reaction torque friction power block and the lower reaction torque friction fixed block is the force converted from the reaction torque of the screw drill. When the central damping torsion bar 4 rotates, the lower counter-torque friction power block 12 also rotates synchronously, and the friction is converted from static friction to dynamic friction, which is converted into the torque force of the central damping torsion bar 4. Therefore, after the reaction torque force of the screw drilling tool is converted by the device, the reaction torque force is finally uploaded to the ground power turntable through the upper drilling tool and is born by ground power equipment.
Therefore, through the description, in the directional drilling process, the drilling tool on the drill rod can normally rotate, the drilling tool below the drill rod can still keep a non-rotating state, the directional operation of the conventional screw drilling tool can be realized without being influenced by the change of the bit pressure, and the application range is very wide.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (9)
1. A screw drilling tool anti-torque damper comprises an upper rotary joint (1), an assembly shell (2) and a lower joint (3); the method is characterized in that: the lower end of the upper rotary joint (1) is inserted into the assembly shell (2), the lower end of the assembly shell (2) is in threaded connection with the lower joint (3), the inner wall of the lower end of the upper rotary joint (1) is in threaded connection with the central damping torsion bar (4), a plurality of sliding grooves (19) are axially and uniformly distributed on the outer wall of the upper part of the central damping torsion bar (4), and the outer wall of the central damping torsion bar (4) at the lower end of the sliding grooves (19) is in a polyhedral shape;
a pressurizing thrust bearing (9) is arranged between the outer wall of the upper part of the central damping torsion bar (4) and the inner wall of the assembly shell (2), the inner wall of the assembly shell (2) is connected with an upper anti-torque damping fixed block (6) in a threaded manner, a plurality of spiral cambered surface grooves I (20) which are equal in length and are connected end to end are arranged on the bottom surface of the upper anti-torque damping fixed block (6), an upper anti-torque damping power block (7) is arranged at the lower end of the upper anti-torque damping fixed block (6), spiral cambered surface grooves II (21) which are the same as the spiral cambered surface grooves I (20) on the bottom surface of the upper anti-torque damping fixed block (6) in number and shape are arranged on the upper end surface of the upper anti-torque damping power block (7), damping balls (18) are arranged between the spiral cambered surface grooves I (20) and the spiral cambered surface grooves II (21), a plurality of pre-tightening notches are, the pre-tightening spring fixing sleeve (14) is in threaded connection with the side wall of the pre-tightening spring fixing threaded hole, a pre-tightening spring (15) is arranged in the pre-tightening spring fixing sleeve (14), a pre-tightening spring ball seat (16) is arranged at the lower end of the pre-tightening spring (15), a pre-tightening ball (17) is arranged at the bottom end of the pre-tightening spring ball seat (16), and the pre-tightening ball (17) extends out of a pre-tightening notch under the action of spring force of the pre-tightening spring (15;
the lower end of an upper anti-torque damping power block (7) is provided with a torque thrust bearing (8), the torque thrust bearing (8) is arranged between the outer wall of a central damping torsion bar (4) and the inner wall of an assembly shell (2), the lower end of the torque thrust bearing (8) is provided with a damping spring upper follow-up cushion block (10), the lower end of the damping spring upper follow-up cushion block (10) is connected with a damping spring (11), the lower end of the damping spring (11) is connected with a lower anti-torque friction power block (12), the inner walls of the damping spring upper follow-up cushion block (10) and the lower anti-torque friction power block (12) are both designed into an inner polyhedral shape matched with the polyhedral outer wall of the central damping torsion bar (4), the lower end of the lower anti-torque friction power block (12) is provided with a lower anti-torque friction fixing block (13), the lower anti-torque friction fixing block (13) is in threaded connection with a, the lower anti-falling screw cap (5) is limited by the lower end surface of the lower anti-torque friction fixing block (13) and the step surface of the inner wall of the lower connecting joint (3).
2. The screw drill anti-torque damper of claim 1, wherein: the inner wall of the assembly shell (2) is sealed with the outer wall of the upper connecting rotary joint (1) through a sealing ring, and the lower reaction torque friction fixing block (13) is sleeved on the central damping torsion bar (4) and is sealed with the central damping torsion bar (4) through the sealing ring.
3. The screw drill anti-torque damper of claim 1, wherein: the cross section of the sliding groove (19) is a circular arc surface, the radius of the circular arc surface is the same as that of the pre-tightening ball (17), the number of the sliding grooves (19) is 12-32, and the groove depth of the sliding grooves (19) is 2-5 mm.
4. The screw drill anti-torque damper of claim 1, wherein: the polyhedral outer wall of the central damping torsion bar (4) is a hexagonal outer wall.
5. The screw drill anti-torque damper of claim 1, wherein: the outer end face of the bottom ring of the pressurizing thrust bearing (9) is in tight fit with the inner wall face of the assembly shell (2), the inner end face of the bottom ring of the pressurizing thrust bearing (9) is in clearance fit with the outer wall face of the central damping torsion bar (4), the outer end face of the top ring of the pressurizing thrust bearing (9) is in clearance fit with the inner wall face of the assembly shell (2), and the inner end face of the top ring of the pressurizing thrust bearing (9) is in tight fit with the outer wall face of the central damping torsion bar (4).
6. The screw drill anti-torque damper of claim 1, wherein: and 2-4 cooling grooves (22) are arranged on the upper end face of the lower reaction torque friction fixed block (13).
7. The screw drill anti-torque damper of claim 1, wherein: go up anti-torque damping fixed block (6) bottom surface and set up 4 spiral cambered surface grooves I (20), the cross section radius of this spiral cambered surface groove I (20) is the same with damping ball (18) radius, and this spiral cambered surface groove I (20) revolve to be the levogyration, and the pitch of 4 spiral cambered surface grooves I (20) is the same.
8. The screw drill anti-torque damper of claim 1, wherein: the upper anti-torque damping power block (7) is circumferentially and symmetrically provided with 6 pre-tightening notches, and 2 pre-tightening spring fixing threaded holes are axially formed in each pre-tightening notch.
9. The screw drill anti-torque damper of claim 1, wherein: the top end face of the pre-tightening spring fixing sleeve (14) is provided with a hexagonal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110261159.9A CN112943096B (en) | 2021-03-10 | 2021-03-10 | Screw drilling tool reactive torque damper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117145386A (en) * | 2023-09-07 | 2023-12-01 | 西南石油大学 | Downhole reactive torque self-adaptive balancing tool |
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