CN111173443A - Double-liquid-drive rotary percussion drilling impactor and double-liquid-drive rotary percussion drilling method - Google Patents
Double-liquid-drive rotary percussion drilling impactor and double-liquid-drive rotary percussion drilling method Download PDFInfo
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- CN111173443A CN111173443A CN202010084676.9A CN202010084676A CN111173443A CN 111173443 A CN111173443 A CN 111173443A CN 202010084676 A CN202010084676 A CN 202010084676A CN 111173443 A CN111173443 A CN 111173443A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
Abstract
The invention discloses a double-hydraulic drive rotary percussion drilling impactor, which comprises an outer pipe, a percussion hammer, an anvil and a mud motor, wherein the mud motor is arranged in the outer pipe; the oil pressure system component is arranged in the outer pipe and comprises an oil tank and an oil pump; the output shaft of the hydraulic motor is connected with the transmission shaft of the oil pump; the oil pump is communicated with an oil inlet channel of the cylinder body through an oil channel to generate driving force for driving the piston, and an oil return channel is arranged on the cylinder body to be communicated with the cylinder body and the oil tank; the impact hammer is connected to the piston; the anvil is arranged below the punch hammer; and the flushing fluid channel is isolated from an oil way of the sealed oil pressure system assembly and penetrates from the upper end of the outer pipe to the lower end of the outer pipe. The mud motor is driven by flushing fluid, the oil pump in the closed oil pipe is driven by the mud motor, the piston is driven by the oil pump to reciprocate to drive the impact hammer outside the hydraulic system component to strike the anvil, the rotary valve piston moves by being immersed in oil, the service life of the piston component is prolonged, the requirement of drilling and drilling intervals can be met, and the superiority of the rotary percussion drilling can be fully exerted.
Description
Technical Field
The invention relates to an impactor for well drilling, in particular to a double-fluid (flushing fluid and hydraulic oil) rotary-percussion well drilling impactor and a rotary-percussion drilling method.
Background
In the drilling operation of geological or petroleum exploration, the upper part of a drill bit is connected with an impactor, a hammer of the impactor moves up and down to impact an anvil to generate impact kinetic energy, namely, rotary drilling and axial impact are combined, so that the drill bit breaks rock under the action of impact force and rotary shearing force, and the drilling mode is called as rotary percussion drilling. The rotary percussion drilling can greatly improve the drilling speed, and has the advantages of anti-inclination effect, prolonged service life of the drill bit and the like. The rotary percussion drilling can be widely applied to drilling of hard rock stratum, stratum with easy hole deviation and stratum with strong abrasiveness. In addition, in the horizontal drilling process, the friction force between a drilling tool and the stratum can be overcome, and the problem of over-low drilling pressure of the drill bit is solved. The method can be applied to petroleum drilling, coal bed gas shale gas drilling and geothermal drilling, and can meet the requirement of ultra-deep drilling and speed-up drilling.
CN203296693U discloses a "drilling tool that can produce axial impact vibration", has related to an impacter, by outer tube, inner tube, impact hammer and hammering block, the outer tube upper end is through the top connection drilling string, the hammering block passes through the lower clutch connection drill bit or lower drill column, the impact hammer slides and sets up in the outer tube, utilize the change of high-pressure flush fluid action area difference when acting on the upper and lower terminal surface of impact hammer, promote the impact hammer in the outer tube up-and-down reciprocating motion, realize hitting the hammering block, give the drill bit with the drill string through the outer tube with the torque tradition, transmit the impact vibration that the hammering block received to the drill bit. However, the impactor has the following disadvantages: the flushing liquid, namely the slurry, is used as a power medium, particles in the flushing liquid enter a gap between a piston structure of the impact hammer and an outer pipe, abrasion is increased, the service life of the impactor is shortened, the requirement of a drill lifting interval cannot be met (generally, the underground working time is required to be more than 120 hours), the application of the spin drilling technology is limited, and the advantages of the spin drilling technology cannot be fully exerted.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
In view of the above problems of the conventional drilling with rotary percussion, an object of the present invention is to provide a dual-fluid driven percussion drilling impactor, so as to reduce the abrasion of flushing fluid to the impactor, improve the service life, and further meet the requirement of drilling interval.
The technical scheme of the invention is as follows:
a dual-fluid driven rotary percussion drilling impactor comprises an outer tube, a percussion hammer, an anvil and a rotary hammer
The mud motor is arranged in the outer pipe and is used for being driven by the flushing liquid to output rotary power;
the sealed oil pressure system component comprises an oil tank and an oil pump, wherein the oil pump is used for pressurizing hydraulic oil, and a transmission shaft of the oil pump is connected with an output shaft of the hydraulic motor; the oil pump is communicated with an oil inlet channel of the cylinder body through an oil channel to generate a driving force for driving the piston, and an oil return channel on the cylinder body is communicated with the cylinder body and an oil tank;
the impact hammer is positioned in the outer pipe and connected to the piston;
the anvil is arranged at the lower end of the outer pipe and is positioned below the punch hammer;
and the flushing liquid channel is isolated from an oil way of the sealed oil pressure system component in the outer pipe and penetrates from the upper end of the outer pipe to the lower end of the outer pipe.
The oil tank both can be an independent oil tank, the oil-out connect in oil pump oil inlet, the oil return opening connect in cylinder body oil return passageway. In order to reduce pipelines and improve the structural tightness, the oil tank is a section of oil storage pipe filled with hydraulic oil, the oil pump is immersed in the hydraulic oil in the oil storage pipe, and a transmission shaft used as power input of the oil pump penetrates through the upper end cover of the oil storage pipe to be connected to an output shaft of the mud motor. The oil pump inlet does not need a connecting pipeline, the structure is compact, and the utilization rate of the inner space of the outer pipe is improved.
In the invention, the piston and the cylinder body of the sealed oil pressure system component can adopt the structure and the driving mode of the traditional impactor, and only the flushing liquid is changed into hydraulic oil. In the present invention, as a preferred embodiment, a more advanced structure is adopted: the lower end of the oil storage pipe is connected with a piston cylinder body, a rotary valve piston is arranged in a piston cylinder body, an output shaft of the mud motor or a shaft of the oil pump further penetrates through an upper end cover of the piston cylinder body and is inserted into the rotary valve piston through a key, a spline or a non-circular cross section to drive the rotary valve piston to rotate, a plurality of oil channels are arranged on the rotary valve piston and respectively communicated with the upper end surface and the lower end surface of the piston, the oil channels are respectively communicated with an oil inlet channel and an oil return channel on the piston cylinder body through oil ports in a piston stroke range, the oil inlet channel is communicated with an oil pump outlet. The rotary valve piston is a component which can generate up-and-down reciprocating motion and is a part of the oil way switching valve, the structure is simple, the rotary valve piston is always in a high-pressure area at one end, a low-pressure area is at the other end, and sufficient pressure difference between an upper cavity and a lower cavity at two ends of the piston is ensured.
The oil passage on the rotary valve piston can be a hole on the piston, is convenient to process for simplifying the structure, especially can adopt axial oil through grooves uniformly distributed along the side wall of the piston to ensure that the oil passage and the oil return passage on the piston cylinder are simply and conveniently communicated, the oil through grooves lead to the upper end surface of the piston and lead to the lower end of the piston are alternately arranged, and when the oil passage on the piston cylinder and the oil outlet passage are arranged at a corresponding oil through groove leading to the lower end surface of the rotary valve piston, the other oil through groove corresponding to the upper end surface of the rotary valve piston.
Further, the mud motor is a turbine motor or a screw motor or a gear motor.
In order to simplify the structure, further, the output shaft of the mud motor is connected with a transmission shaft penetrating through the oil pump, and the lower end of the transmission shaft is inserted into the piston so as to drive the oil pump and the piston to rotate simultaneously.
The invention also provides a double-liquid driving rotary percussion drilling method, which comprises the following steps: the drill rod is utilized to provide rotary torque for the drill bit to drill, meanwhile, the slurry motor in the underground outer pipe is driven through flushing fluid, the oil pump of the sealed oil pressure system is driven through the slurry motor in the underground outer pipe, high-pressure hydraulic oil generated by the oil pump drives the piston to reciprocate, the piston drives the impact hammer to strike the anvil connected with the drill bit through the connecting rod passing through the lower portion of the sealed oil pressure system, and pulse impact kinetic energy is provided for the drill bit.
In the invention, the double liquid of the double-liquid driving rotary percussion drilling impactor is used for flushing liquid in full-hole circulation and hydraulic oil in the impactor in closed circulation.
The invention utilizes the flushing fluid to drive the mud motor, the mud motor drives the oil pump in the sealed oil pressure system component, the oil pump drives the piston to generate reciprocating motion to drive the impact hammer outside the sealed oil pressure system component, because the piston generating impact power is driven by hydraulic oil instead of flushing fluid, and the oil pressure system is in a closed system and is isolated from the flushing fluid, the service life of the piston component is prolonged, the problems that the service life of the existing impactor directly driven by the flushing fluid is low, and the requirement of a drill lifting interval cannot be met (generally, the underground working time is required to be more than 120 hours) are solved, and the superiority of rotary percussion drilling is fully exerted.
Drawings
FIG. 1 is a schematic diagram of a dual fluid driven rotary percussion drilling impactor according to the present invention in state one.
FIG. 2 is a schematic diagram of a dual fluid-driven rotary percussion drilling impactor configuration two.
Fig. 3 is a schematic structural diagram of the power section.
FIG. 4 is a schematic diagram of a piston upstroke condition of the impulse section;
FIG. 5 is a schematic diagram of a second structure of the piston descending state of the impulse section;
FIG. 6 is a schematic view of another embodiment of an impulse section;
FIG. 7 is a schematic view of the structure of the impact section;
3 FIG. 3 8 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 7 3; 3
In the figure: 1. an upper joint, 2, an outer pipe I, 3, a motor upper joint, 4, a screw motor, 5, a motor lower joint, 6, a motor output shaft, 7, a transmission shaft, 8, a middle joint, 9, a slurry through chamber, 10, a slurry channel, 11, an upper end cover, 12, an oil storage pipe, 13, an outer pipe II, 14, an oil pump, 15, an annular gap, 16, an energy accumulator, 17, an upper chamber, 18, an oil inlet channel, 19, an oil return channel, 20, a lower chamber oil through groove, 21, an upper chamber oil through groove, 22, a piston cylinder body, 23, a rotary valve piston, 24, a lower chamber, 25, a valve piston cover, 26, a hammer chamber, 27, a hammer, 28, an outer pipe III, 29, a centering ring, 30, a centering joint, 31, an anvil, 32, a sliding shaft sleeve, 33, an adjusting pad, 34, a lower joint, 35, an inner cylinder, 36, a piston
100. Power section, 200, impulse section, 300, impulse section, 400, anvil section
Detailed Description
The invention is further described below in conjunction with the drawings and the detailed description of the invention to assist in understanding the content of the invention.
Referring to fig. 1 and 2, a preferred embodiment of a dual fluid driven, rotary percussion drill impactor in accordance with the present invention is shown. The shell is an external circular tube structure (called as an 'outer tube' for short), the upper end of the shell is connected with an upper connector 1 through threads so as to be connected with a drill rod conveniently, the lower end of the shell is provided with a lower connector 34, and the lower connector 34 is used for being directly connected with a drill bit or a core tube.
For convenience of processing and assembly, the outer pipe is assembled by three sections, namely the first outer pipe 2, the second outer pipe 13 and the third outer pipe 28, and each section of the outer pipe is assembled with different components to form different functional sections. The outer pipe I2 and the outer pipe II 13 are connected in an engaged mode through an intermediate joint 8, the outer pipe III 28 is connected with a centering joint 30 through threads, an anvil 31 connected with a lower joint 34 is arranged in the centering joint 30 and a sliding shaft sleeve 32, and each joint is also a section of outer pipe in nature.
The first outer pipe 2 is internally provided with a screw motor 4 (or a turbine motor or a gear motor) as the screw motor 4 driven by the flushing liquid to generate primary power, and thus the part is the power section 100. An oil pressure system component is arranged in the outer pipe II 13, a mud motor of the power section 100 is used as a power source, the oil pump 14 is driven to generate high-pressure oil, and then the piston is driven to reciprocate to form an impact action, namely an impact section 200. The third outer tube 28 is a movement space section of the hammer 27, which is an impact section 300, and the lower end is an anvil section 400 where the anvil 31 is installed. The following is a detailed description of each segment with reference to the drawings.
The power section is as shown in fig. 3, and inside outer tube 2, have screw motor 4 to fix through the motor top connection 3 and the installation of motor lower clutch 5 at both ends inside outer tube 2, motor top connection 3 and motor lower clutch 5 are the flange, push up tightly through the flat or sloping shoulder at outer tube 2 both ends and with top connection 1 and the middle joint 8 of outer tube both ends threaded connection and block, and this kind of mounting means is simple and convenient, firm and the dismouting is swift. The flushing liquid entering the upper joint 1 and the outer pipe one 2 after driving the screw motor 4 enters the mud pass-through chamber 9 in the middle joint 8 through the central channel of the motor output shaft 6 and is further conveyed downwards through the mud channel 10. The screw motor 4 can also be replaced by a turbine motor or a gear motor, and the hydraulic motors of the type drive the output shaft to rotate through high-pressure slurry, and as the prior art, the specific structure of the slurry motor is not described.
The output shaft of the screw motor 4 is inserted into the drive shaft 7 through a spline or a torque-transmitting coupling structure such as a regular polygon as shown in fig. 8, and the coupling position is provided at the position of the intermediate joint 8 for assembly.
The structure of the impulse section is shown in fig. 4, and in the second outer pipe 13, the key component for generating the impulse kinetic energy is a set of oil pressure system components. An oil storage pipe 12 is coaxially arranged in the second outer pipe 13, hydraulic oil is filled in the oil storage pipe as an oil tank, the upper end of the oil storage pipe 12 is sealed through an upper end cover 11, the upper end cover 11 is in threaded connection with the oil storage pipe 12 and is pressed and abutted against the inner wall of the second outer pipe 13 through a middle joint 8 in the figure 3 through a flange of the oil storage pipe, a through hole is annularly arranged on the flange of the upper end cover 11 to form a slurry channel 10, so that slurry on the upper portion of the upper end cover 11 enters an annular gap 15 between the second outer pipe 13 and the oil storage pipe 12 through the slurry channel 10 and is further conveyed downwards, and meanwhile, the slurry also has a cooling effect on the oil. The lower end of the oil storage tube 12 is connected with a piston cylinder 22 through screw threads, and the piston cylinder 22 is connected with a valve body piston cover 25 through screw threads to seal the lower end of the piston cylinder 22. The valve body piston cap 25 is held tight by the outer tube three 28 and has through holes around its periphery to allow slurry in the annular gap 15 to enter the outer tube three 28.
The core oil pressure medium power component of the invention, as a specific scheme of a preferred embodiment, is as follows: the oil storage pipe 12 is internally provided with hydraulic oil and an oil pump 14, the piston cylinder 22 is internally provided with a rotary valve piston 23, and the rotary valve piston 23 is a valve for switching oil ways through rotation and also forms a piston for realizing up-and-down reciprocating motion under the action of pressure difference of the hydraulic oil, which is the ingenious point of the invention. The transmission shaft 7 penetrating the upper end cover 11 is used as an input shaft of the oil pump 14, penetrates through the oil pump 14 and is inserted into an inner cavity of the piston cylinder 22, and a seal is arranged between the transmission shaft 7 and the upper end cover 11 to isolate hydraulic oil from slurry. In order to ensure the pressure of the upper cavity 17 for pushing the rotary valve piston 23 to move downwards, a seal, a packing seal or an O-shaped sealing ring and the like are also arranged between the transmission shaft 7 and the upper end of the piston cylinder body 22. The oil outlet of the oil pump 14 is communicated to the oil inlet channel 18 of the piston cylinder 22 after being stored by the energy accumulator 16, so as to introduce high-pressure hydraulic oil into the inner cavity of the piston cylinder 22, an oil return channel 19 is arranged in the piston cylinder 22 and is communicated with the middle part of the cavity of the piston cylinder 22 and the oil storage space of the oil storage pipe 12, in this embodiment, the oil pump 14 is directly immersed in the hydraulic oil of the oil storage pipe 12, namely, the hydraulic oil directly enters the oil pump 14 from the oil storage cavity of the oil storage pipe 12, therefore, the oil return channel 19 only needs to be communicated to the oil storage space of the oil storage pipe 12, and does not need. The rotary valve piston 23 is sleeved at the lower end of the transmission shaft 7 and transmits torque through a spline or a regular polygon structure, namely, the transmission shaft 7 can transmit torque to the rotary valve piston 23 to enable the rotary valve piston 23 to rotate so as to switch the oil inlet and outlet directions of an oil path, and the rotary valve piston 23 can reciprocate up and down along the transmission shaft 7 in a cavity of the piston cylinder body 22. An axial lower cavity oil through groove 20 is formed in the outer side wall of the rotary valve piston 23 and communicated to a lower cavity 24, and an axial upper cavity oil through groove 21 is formed in the upper cavity 17 at the upper part of the upper end surface of the rotary valve piston 23, in the embodiment, the oil inlet channel 18 on the piston cylinder body 22 is arranged symmetrically with the oil return channel 19, and similarly, the lower cavity oil through groove 20 and the upper cavity oil through groove 21 on the rotary valve piston 23 are also arranged symmetrically and alternately. Thus, as shown in fig. 4, when the high-pressure hydraulic oil generated by the oil pump 14 is stored and buffered by the accumulator 16, and enters the lower cavity 24 below the rotary valve piston 23 through the lower cavity oil channel 20 on the side wall of the rotary valve piston 23 along the oil inlet channel 18 of the piston cylinder 22, the upper cavity 17 above the rotary valve piston 23 is communicated to the oil return channel 19 of the piston cylinder 22 through the upper cavity oil channel 21 on the side wall of the rotary valve piston, so as to communicate with the cavity of the oil storage tube, i.e., the oil tank.
In the state shown in fig. 4, the lower chamber 24 is filled with the high-pressure hydraulic oil pressurized by the oil pump 14, the upper chamber 17 is at normal pressure due to communication with the oil tank, the high-pressure hydraulic oil continuously filled into the lower chamber 24 under the action of pressure difference rapidly pushes the rotary valve piston 23 to move upward, and meanwhile, the hydraulic oil in the upper chamber 17 returns to the oil tank formed by the oil storage pipe 12 through the upper chamber oil through groove 21 and the oil return passage 19, so that the circulation of the hydraulic oil is realized.
Because the rotary valve piston 23 is driven to rotate by the transmission shaft 7 in the upward movement process, after rotating a certain angle, as shown in fig. 5, the upper cavity oil through groove 21 on the rotary valve piston 23 is communicated with the oil inlet channel 18 on the piston cylinder body, and the lower cavity oil through groove 20 is communicated with the oil return channel 19, which is equivalent to the completion of the reversing switching of the piston oil path. At this time, the high-pressure hydraulic oil enters the upper chamber 17 to change the upper chamber 17 into high pressure, the lower chamber 24 is changed into normal pressure due to the communication with the oil tank, and the rotary valve piston 23 rapidly moves downwards under the action of pressure difference. When the rotary valve piston 23 continuously rotates under the driving of the transmission shaft 7, the upper cavity 17 and the lower cavity 24 realize the alternate conversion of high pressure and normal pressure, so the rotary valve piston 23 reciprocates up and down in the piston cylinder 22, and the connecting rod passing through the valve body piston cover 25 drives the impact hammer 27 to do reciprocating impact motion.
According to the structure of the preferred embodiment, the number of the upper cavity oil through grooves 21 and the lower cavity oil through grooves 20 on the rotary valve piston 23 is set, and the rotating speed of the rotary valve piston 23 is matched, so that the change of the oil circuit switching times in unit time can be realized, and different impact frequencies are designed. By matching the output pressure of the oil pump 14, the end surface areas of the rotary valve piston 23 in the upper chamber 17 and the lower chamber 24 are designed to have different impact kinetic energies.
In order to generate a damping force when the rotary valve piston 23 moves upward to reach the top of the stroke, and to avoid hard collision between the rotary valve piston 23 and the piston cylinder 22, as shown in fig. 4 and 5, an annular boss is provided on the upper end surface of the rotary valve piston 23, an annular groove is correspondingly formed on the piston cylinder 22 around the transmission shaft, and when the rotary valve piston 23 moves upward to form a closed oil chamber when the boss is inserted into the groove, an oil pad generated by hydraulic oil in the groove plays a role in damping.
In fig. 6, another embodiment of the hydraulic system components is shown in the outer tube two 13. An inner cylinder 35 is fixedly arranged in the oil storage pipe 12, an oil inlet channel 18 is arranged in the middle of the inner cylinder 35, a piston 36 is arranged between the inner cylinder 35 and the oil storage pipe 12, a throttling bulge is arranged in the middle of the upper surface of the piston 36 corresponding to the oil inlet channel 18 of the inner cylinder 35, a limiting boss is arranged at the lower part of the piston, the oil inlet channel on the piston is communicated with an upper cavity 17 and a lower cavity 24, an oil return channel 19 is communicated with the inner space of the lower cavity 24 and the oil storage pipe 12, the flow section of the oil return channel 19 on the piston 36 is smaller than the total flow section of the oil inlet channel, the piston 36 is also connected with a punch hammer through a connecting rod, and the. The outlet of the oil pump 14 driven by the transmission shaft 7 is connected with the oil inlet channel 18 of the inner cylinder 35, high-pressure hydraulic oil generated by the oil pump 14 enters the lower cavity 24 below the piston through the oil inlet channel on the piston 36, the pressure of the lower cavity 24 below the piston 36 is increased due to the throttling effect caused by the fact that the flow cross section of the oil return channel of the piston 36 is smaller than the total flow cross section of the oil inlet channel, the area of the piston 36 in the lower cavity 24 is larger than that in the upper cavity 17, the piston 36 is subjected to upward pressure and larger than downward pressure, the piston 36 is pushed to rise by pressure difference to overcome gravity and resistance, when a throttling bulge on the piston 36 enters the jet orifice of the oil inlet channel 18 of the inner cylinder 35, the flow area of the hydraulic oil is reduced, the oil hammering effect is generated, and the piston 36 moves downwards.
The structure of the ram section is shown in fig. 7, and is connected to the inside of the outer tube three 28 at the lower end of the outer tube two 13, which is a ram cavity 26. Because the impact hammer 27 is a counterweight, the inertia force is improved through the mass, and the impact resistance is improved through the mechanical property of the material, the impact hammer 27 ensures that the impact hammer does not swing in the operation process through a centering ring 29, and an enough annular gap is formed between the impact hammer 27 and the inner wall of the outer pipe III 28, so that the impact hammer and the outer pipe III are not contacted and rubbed except being used as a channel for conveying mud to a drill bit, and the service life of the impact hammer 27 is prolonged. The centralizing ring 29 is provided with through holes uniformly distributed in an annular manner to form a slurry channel. Due to the presence of the hammer centralizing ring 29, the hammer remains centered against downward deflection under gravity even if the impactor is horizontal or inclined, and can be used for horizontal drilling.
In fig. 7, the lower end of the outer tube three 28 is connected with a sliding sleeve 32 through a centering joint 30 which is connected with the lower end of the outer tube three through threads, an anvil 31 is arranged in the centering joint 30 and the sliding sleeve 32, and the lower end of the anvil 31 is connected with a lower joint 34 through threads. The upper end of the anvil 31, which is located at the inner part of the centering joint 30, has a large diameter and is provided with an O-shaped ring, the lower end of the anvil, which passes through the sliding sleeve 32, has a small diameter, and correspondingly, the inner diameter of the sliding sleeve 32 is also small, so that a lower-limit anti-falling structure is formed by a shoulder on the anvil 31 and the upper edge of the sliding sleeve 32. An adjusting pad 33 is arranged between the sliding shaft sleeve and the lower joint 34 so as to adjust the stroke of the hammer. The anvil 31 has a mud passage in the center to provide access to the drill bit.
In order to facilitate the discharge of the slurry when the punch 27 moves up and down, the upper and lower ends of the punch 27 are designed to be chamfered or rounded. The middle part of the upper end of the anvil 31 adopts a mushroom head bulge, and the root part of the mushroom head bulge is an inclined hole and is communicated with a slurry channel in the middle part. The mode can improve the force bearing area of the impact part without influencing the flow of slurry, and the impact part can be made of high impact resistant materials.
The torque transmission between the anvil 31 and the sliding sleeve 32 is achieved by a polygonal cross-section, as shown in figure 8.
According to the above principle, it can be understood that the double-liquid drive rotary percussion drilling method of the invention comprises the following steps: the drill rod is utilized to provide rotary torque for the drill bit to drill, meanwhile, the slurry motor in the underground outer pipe is driven through flushing fluid, the underground slurry motor is utilized to drive an oil pump of the sealed oil pressure system, high-pressure hydraulic oil generated by the oil pump drives a piston to reciprocate, and the piston drives a punching hammer to strike an anvil connected with the drill bit through a connecting rod penetrating through the sealed oil pressure system, so that pulse vibration kinetic energy is provided for the drill bit.
The invention adopts two-way circulating systems, one is mud circulation, and the other is oil pressure circulation. And (3) slurry circulation: the drilling mud drives the mud motor to rotate, the working mud passes through the periphery of a hydraulic oil tank (oil storage pipe) to play a role of cooling the hydraulic oil tank, then enters an impact area of a hammer cavity 26 through an annular gap 15 between the outer pipe and the piston cylinder body, and then flows to a hole bottom drill bit through an anvil water drain hole. Oil pressure circulation: the screw motor or the turbine motor drives the oil pump in a rotating mode, high-pressure hydraulic oil pumped out by the oil pump enters the cylinder body through the oil inlet channel, a pushing force for pushing the piston is generated by utilizing the pressure and area difference between the upper cavity and the lower cavity of the upper end and the lower end of the piston, the piston is made to reciprocate up and down, and return oil returns to the oil tank through the oil return channel. The whole hydraulic oil system is completely closed and circulated and is not contacted with mud.
Claims (10)
1. The utility model provides a biliquid drive rotary-percussion well drilling impacter, includes outer tube, impact hammer and hammering block, its characterized in that still includes:
the mud motor is arranged in the outer pipe and is used for being driven by the flushing liquid to output rotary power; the sealed oil pressure system component is arranged in the outer pipe and comprises an oil tank and an oil pump, and an output shaft of the slurry motor is connected with a transmission shaft of the oil pump; the oil pump is communicated with an oil inlet channel of the cylinder body through an oil channel to generate a driving force for driving the piston, and an oil return channel is arranged on the cylinder body and communicated with the cylinder body and an oil tank;
the impact hammer is positioned in the outer pipe and connected to the piston;
the anvil is arranged at the lower end of the outer pipe and is positioned below the punch hammer;
and the flushing fluid channel is isolated from an oil way of the sealed oil pressure system assembly and penetrates from the upper end of the outer pipe to the lower end of the outer pipe.
2. The dual fluid drive rotary percussion drill impactor of claim 1, wherein: the oil tank is a section of oil storage pipe filled with hydraulic oil, the oil pump is immersed in the hydraulic oil in the oil storage pipe, and the transmission shaft used as power input of the oil pump penetrates through the upper end cover of the oil storage pipe to be connected to the output shaft of the mud motor.
3. The dual fluid drive rotary percussion drill impactor of claim 2, wherein: the mud motor is characterized in that the lower end of the oil storage pipe is connected with a piston cylinder body, a rotary valve piston is arranged in a piston cylinder body, an output shaft of a mud motor or a shaft of an oil pump further penetrates through an upper end cover of the piston cylinder body and is inserted into the rotary valve piston through a key, a spline or a non-circular cross section to drive the rotary valve piston to rotate, a plurality of oil channels communicated to the upper end surface and the lower end surface of the piston are arranged on the rotary valve piston respectively, the oil channels are communicated with an oil inlet channel and an oil return channel on the piston cylinder body through oil ports respectively, the oil inlet channel is communicated with an oil pump outlet.
4. The dual fluid drive rotary percussion drill impactor of claim 3, wherein: the oil channel on the rotary valve piston is an axial oil through groove which is uniformly distributed along the side wall of the piston, the oil through grooves which are led to the upper end surface of the piston and led to the lower end of the piston are alternately arranged, and when the oil inlet channel and the oil outlet channel on the piston cylinder body are arranged at positions which correspond to the oil through groove which is led to the lower end surface of the rotary valve piston, the other oil through groove which is led to the upper end surface of the rotary valve piston is correspondingly arranged.
5. The dual fluid drive rotary percussion drill impactor of claim 3, wherein: an annular boss is arranged on the upper end face of the rotary valve piston around the transmission shaft, and an annular groove is correspondingly formed in the piston cylinder body.
6. The dual fluid drive rotary percussion drill impactor of claim 2, wherein: the output shaft of the mud motor is connected with a transmission shaft penetrating through the oil pump, and the lower end of the transmission shaft is inserted into the piston so as to drive the oil pump and the piston to rotate simultaneously.
7. The dual fluid drive rotary percussion drill impactor of claim 1, wherein: a righting ring is arranged between the impact hammer and the outer pipe.
8. The dual fluid drive rotary percussion drill impactor of claim 1, wherein: the middle part of the upper end of the anvil adopts a mushroom head bulge, and the root part of the mushroom head bulge is provided with an inclined hole which is communicated with a slurry channel in the middle part.
9. The dual fluid drive rotary percussion drill impactor of claim 1, wherein: the lower end of the outer pipe is connected with a centering joint and a sliding shaft sleeve, the anvil is arranged in the centering joint and the sliding shaft sleeve, the lower end of the anvil is connected with a lower joint, the part of the upper end of the anvil, which is positioned in the centering joint, is large in diameter and is provided with an O-shaped ring, the part of the lower end of the anvil, which penetrates through the sliding shaft sleeve, is small in diameter, the inner diameter of the sliding shaft sleeve is correspondingly small, and an adjusting pad is arranged between the sliding shaft sleeve and the lower joint.
10. A double-liquid drive rotary-percussion drilling method comprises the following steps: the drill rod is utilized to provide rotary torque for the drill bit to drill, meanwhile, the slurry motor in the underground outer pipe is driven through flushing fluid, the oil pump of the sealed oil pressure system is driven through the slurry motor in the outer pipe, high-pressure hydraulic oil generated by the oil pump drives the piston to reciprocate, the piston drives the impact hammer to strike the anvil connected with the drill bit through the connecting rod penetrating through the sealed oil pressure system, and pulse impact kinetic energy is provided for the drill bit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084676.9A CN111173443A (en) | 2020-02-10 | 2020-02-10 | Double-liquid-drive rotary percussion drilling impactor and double-liquid-drive rotary percussion drilling method |
| PCT/CN2020/089956 WO2021159620A1 (en) | 2020-02-10 | 2020-05-13 | Double-liquid driven rotary percussion drilling impactor and double-liquid driven rotary percussion drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084676.9A CN111173443A (en) | 2020-02-10 | 2020-02-10 | Double-liquid-drive rotary percussion drilling impactor and double-liquid-drive rotary percussion drilling method |
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| CN111173443A true CN111173443A (en) | 2020-05-19 |
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| CN (1) | CN111173443A (en) |
| WO (1) | WO2021159620A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627721A (en) * | 2020-12-19 | 2021-04-09 | 李永和 | Continuous axial impact rock breaking hammer |
| CN113445903A (en) * | 2021-08-11 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Self-closing double-oil-passage drill rod connecting structure |
| CN113445902A (en) * | 2021-08-11 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Self-closing multichannel high-pressure drill rod |
| SE2130146A1 (en) * | 2021-05-28 | 2022-11-29 | Per Gustafsson | Rotary unit for drilling |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024018015A1 (en) * | 2022-07-21 | 2024-01-25 | Mincon International Limited | Hybrid hydraulic down-the-hole hammer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2866785Y (en) * | 2005-01-19 | 2007-02-07 | 李国民 | Rotary valve type hydraulic percussion device |
| CN201031614Y (en) * | 2007-04-11 | 2008-03-05 | 中国石化集团中原石油勘探局钻井工程技术研究院 | Hydraulic impacter for well drilling |
| RU2534116C1 (en) * | 2013-08-30 | 2014-11-27 | Сергей Александрович Ерилин | Method and arrangement of hydram for bottomhole formation area and well development |
| CN106050129B (en) * | 2016-06-06 | 2018-06-01 | 西南石油大学 | A kind of drilling tool that rotary impact is realized using turbine |
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2020
- 2020-02-10 CN CN202010084676.9A patent/CN111173443A/en active Pending
- 2020-05-13 WO PCT/CN2020/089956 patent/WO2021159620A1/en active Application Filing
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627721A (en) * | 2020-12-19 | 2021-04-09 | 李永和 | Continuous axial impact rock breaking hammer |
| CN112627721B (en) * | 2020-12-19 | 2022-11-01 | 盘锦卓汇钻井技术开发有限责任公司 | Continuous axial impact rock breaking hammer |
| SE2130146A1 (en) * | 2021-05-28 | 2022-11-29 | Per Gustafsson | Rotary unit for drilling |
| SE544866C2 (en) * | 2021-05-28 | 2022-12-13 | Per Gustafsson | Rotary unit for drilling |
| CN113445903A (en) * | 2021-08-11 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Self-closing double-oil-passage drill rod connecting structure |
| CN113445902A (en) * | 2021-08-11 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | Self-closing multichannel high-pressure drill rod |
| CN113445903B (en) * | 2021-08-11 | 2023-09-19 | 中煤科工集团重庆研究院有限公司 | Self-closing double-oil-duct drill rod connecting structure |
| CN113445902B (en) * | 2021-08-11 | 2023-09-19 | 中煤科工集团重庆研究院有限公司 | Self-closing multichannel high-pressure drill rod |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021159620A1 (en) | 2021-08-19 |
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