CN114382404A - Hollow inverted screw drill - Google Patents
Hollow inverted screw drill Download PDFInfo
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- CN114382404A CN114382404A CN202011116357.8A CN202011116357A CN114382404A CN 114382404 A CN114382404 A CN 114382404A CN 202011116357 A CN202011116357 A CN 202011116357A CN 114382404 A CN114382404 A CN 114382404A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 77
- 239000011435 rock Substances 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims description 61
- 239000013307 optical fiber Substances 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims 3
- 230000000750 progressive effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
- 239000003208 petroleum Substances 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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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
- E21B4/003—Bearing, sealing, lubricating details
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a hollow inverted screw drill which comprises an outer barrel main body, a transmission shaft, a first universal shaft and a stator, wherein the transmission shaft, the first universal shaft and the stator can do planetary swing in the outer barrel main body are sequentially connected from top to bottom; the transmission shaft, the first universal shaft and the stator are respectively provided with a first energy channel, a second energy channel and a third energy channel which are sequentially communicated along the axial direction, and the first universal shaft is also provided with a liquid passing hole which is communicated with the second energy channel and the first gap. The invention solves the technical problem that the screw drill cannot mechanically break rock and can transmit directional energy.
Description
Technical Field
The invention relates to the field of downhole power drilling tools, in particular to a downhole power drilling tool combining directional energy assistance and mechanical rock breaking, and particularly relates to a hollow reverse screw drilling tool.
Background
In recent years, due to the increasing difficulty and depth of drilling, novel rock breaking modes are also emerging in the drilling process, such as the application of technologies such as plasma rock breaking, electron beam rock breaking, laser rock breaking and the like. These technologies are regarded as revolutionary technologies in the field of 21 st century drilling and are valued by petroleum workers in various countries around the world.
Taking laser rock breaking as an example: the basic principle is that high-energy laser beam is used to directly act on rock, so that the rock is locally and rapidly heated to a molten and gasified state to form a gas-liquid two-phase mixture, and then the gas-liquid two-phase mixture is carried away and removed by high-speed auxiliary gas flow. The combined rock breaking method combining the directional energy assistance and the mechanical rock breaking can obviously improve the mechanical drilling speed by 2 to 4 times, reduce the drilling pressure and the torque by more than 90 percent, and reduce the drilling cost by 10 to 20 percent, so the combined rock breaking method combining the directional energy assistance and the mechanical rock breaking is a high-efficiency new rock breaking method and a new technology. The combined rock breaking and drilling combined with the directional energy assistance and the mechanical rock breaking is to convey the directional energy from the ground to the bottom of a well on the basis of the original drilling equipment, so that a screw drilling tool used as a power tool for the original drilling needs to provide a channel of a directional energy channel and ensure the performance of the output drilling power of the screw drilling tool. However, no screw drill tool capable of matching with the directional energy assisting and mechanical rock breaking exists at the present stage, and the existing screw drill tool cannot meet the requirements of mechanical rock breaking and directional energy transfer to complete directional energy assisted rock breaking, so that the development of a combined rock breaking method combining directional energy assisting and mechanical rock breaking is limited.
Aiming at the problem that a screw drill in the related technology cannot mechanically break rock and can transmit directional energy, an effective solution is not provided at present.
Therefore, the inventor provides the hollow reverse screw drill by virtue of experience and practice of related industries for many years so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a hollow inverted screw drill tool which can combine directional energy assistance and mechanical rock breaking, a drilling medium can flow through the interior of the screw drill tool, a passable hollow channel can be provided for energy equipment such as optical fibers and the like, hydraulic energy is converted into mechanical energy to drive a drill bit to drill, and meanwhile directional energy can be conveyed to the bottom of a well to perform combined rock breaking operation with the drill bit, so that the drilling efficiency is improved.
The purpose of the invention can be realized by adopting the following technical scheme:
the invention provides a hollow inverted screw drill which is arranged at the bottom of a drill string and is lowered to a preset position in a well along with the drill string, and the hollow inverted screw drill comprises an outer cylinder main body, a transmission shaft, a first universal shaft and a stator capable of performing planetary swing in the outer cylinder main body, wherein:
the transmission shaft, the first universal shaft and the stator are sequentially connected from top to bottom, the outer cylinder main body can be rotatably sleeved on the outer sides of the transmission shaft, the first universal shaft and the stator, a drill bit is arranged at the bottom end of the outer cylinder main body, the top end of the transmission shaft is connected with the drill string, the transmission shaft is rotatably connected with the outer cylinder main body, a first clearance and a spiral second clearance which are communicated with each other are respectively reserved between the first universal shaft and the stator and between the outer cylinder main body and the outer cylinder main body, and a fourth energy channel communicated with the second clearance is formed in the drill bit; a first energy channel, a second energy channel and a third energy channel which are sequentially communicated are respectively arranged on the transmission shaft, the first universal shaft and the stator along the axial direction, and a liquid passing hole which is communicated with the second energy channel and the first gap is also arranged on the first universal shaft; an energy supply cable sequentially passes through the first energy channel, the second energy channel, the third energy channel and the fourth energy channel and is connected with a directional energy rock breaking device in the well, and a drilling medium sequentially passes through the first energy channel, the liquid passing hole, the first gap, the second gap and the fourth energy channel and is discharged into the well;
when the drilling medium passes through the second gap, the drilling medium pushes the stator to perform planetary swing in the outer cylinder main body, and the outer cylinder main body performs circumferential rotation.
In a preferred embodiment of the present invention, a first bearing and a third bearing for bearing a radial load of the transmission shaft and a second bearing for bearing an axial load of the transmission shaft are disposed between the transmission shaft and the outer cylinder main body, the first bearing, the second bearing and the third bearing are all sleeved on the transmission shaft, an inner wall of the first bearing, an inner wall of the second bearing and an inner wall of the third bearing are all connected to an outer wall of the transmission shaft, and an outer wall of the first bearing, an outer wall of the second bearing and an outer wall of the third bearing are all connected to an inner wall of the outer cylinder main body.
In a preferred embodiment of the present invention, the first bearing, the second bearing and the third bearing are sequentially arranged from top to bottom.
In a preferred embodiment of the present invention, the first bearing and the third bearing are both radial bearings; the second bearing is a thrust bearing.
In a preferred embodiment of the present invention, the top end of the transmission shaft extends above the outer cylinder main body and is connected to the bottom of the drill string, and a fishing boss capable of being engaged with a fishing tool is disposed on the outer wall of the transmission shaft above the outer cylinder main body.
In a preferred embodiment of the present invention, the number of the liquid passing holes is multiple, each of the liquid passing holes is located at an upper portion of the first universal shaft, and the liquid passing holes are uniformly arranged along a circumferential direction of the first universal shaft.
In a preferred embodiment of the present invention, the first cardan shaft is a flexible shaft cardan shaft.
In a preferred embodiment of the present invention, a plurality of spiral first bosses are uniformly distributed on an outer wall of the stator in a circumferential direction, a plurality of spiral second bosses are uniformly distributed on an inner wall of the outer cylinder body in a position opposite to the stator in the circumferential direction, a spiral direction of the first bosses is the same as a spiral direction of the second bosses, and the number of the first bosses is smaller than that of the second bosses, so that the second gap is formed between the inner wall of the outer cylinder body and the outer wall of the stator.
In a preferred embodiment of the present invention, a rock breaking device joint is disposed below the stator, and a top end of the rock breaking device joint is connected to the energy supply cable, and a bottom end of the rock breaking device joint passes through the fourth energy channel and is connected to the directional energy rock breaking device.
In a preferred embodiment of the invention, a fourth gap is left between the outer wall of the rock breaking device joint and the inner wall of the fourth energy channel for the drilling medium to pass through.
In a preferred embodiment of the present invention, a second universal shaft is disposed between the stator and the rock breaking device joint, a top end of the second universal shaft is connected to a bottom end of the stator, a bottom end of the second universal shaft is connected to a top end of the rock breaking device joint, the second universal shaft is provided with a fifth energy channel communicated with the third energy channel, and the third energy channel is communicated with the fourth energy channel through the fifth energy channel.
In a preferred embodiment of the present invention, the second cardan shaft is a flexible shaft cardan shaft.
In a preferred embodiment of the present invention, the outer cylinder main body includes a transmission shaft housing, a universal shaft housing, a rotor housing, and a drill bit joint housing, which are sequentially connected from top to bottom, the transmission shaft housing, the universal shaft housing, the rotor housing, and the drill bit joint housing are all vertically arranged cylindrical structures with openings at two ends, the transmission shaft is located in the transmission shaft housing, the first universal shaft is located in the universal shaft housing, the stator is located in the rotor housing, and the second universal shaft and the upper portion of the rock breaking device joint are both located in the drill bit joint housing.
In a preferred embodiment of the present invention, the energy supply cable is an optical fiber.
In a preferred embodiment of the present invention, the directional energy rock breaking device is a fiber laser or an ultrasonic generator.
From the above, the hollow inverted screw drill of the invention has the characteristics and advantages that:
the bottom of urceolus main part is provided with the drill bit, the inside of urceolus main part has from top to bottom connected with the transmission shaft in proper order, first universal shaft and stator, and at the transmission shaft, set up the first energy passageway of order intercommunication respectively on first universal shaft and the stator, second energy passageway and third energy passageway, the fourth energy passageway has been seted up on the drill bit, thereby can provide energy passageway for energy supply cables such as optic fibre, provide the energy for the broken rock device of directional energy in the pit, guarantee going on smoothly of the supplementary broken rock of directional energy.
The transmission shaft can be rotationally connected with the outer barrel main body, a first gap and a second gap which are communicated with each other are respectively reserved between the first universal shaft and the outer barrel main body and between the stator and the outer barrel main body, a liquid passing hole which is communicated with the second energy channel and the first gap is formed in the first universal shaft, the fourth energy channel is communicated with the second gap, and the drilling medium can push the stator to do planetary swing in the outer barrel main body in the process of passing through the second gap.
The stator sets up in the inside of urceolus main part, the planet swing is only done in the inside of urceolus main part to the stator in operation process, and do not do circumferential direction, the urceolus main part drives the drill bit and does circumferential direction, the energy supply cables such as the optic fibre of not only being convenient for are in proper order through first energy passageway, the second energy passageway, third energy passageway and fourth energy passageway, and can not cause the influence to the normal operation of drill bit, it is reasonable with directional energy destruction stratum and mechanical drilling, the technological effect of effective combination to have reached, further improve the drilling speed, improve well drilling operating efficiency greatly.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Wherein:
FIG. 1: is a schematic structural diagram of the hollow inverted screw drill.
FIG. 2: which is a partial enlargement of the position a in fig. 1.
FIG. 3: which is a partial enlarged view of the position B in fig. 1.
FIG. 4: a partial enlarged view of the position C in fig. 1.
FIG. 5: the invention is a schematic view of a connecting structure of a stator and a rotor shell in a hollow inverted screw drill.
FIG. 6: a partial enlarged view of the position D in fig. 1.
The reference numbers in the invention are:
1. an outer cylinder body; 101. A drive shaft housing;
102. a cardan shaft housing; 103. A rotor housing;
1031. a second boss; 104. A bit sub housing;
2. a drill bit; 3. A drive shaft;
301. fishing the boss; 302. A first energy channel;
4. a first bearing; 5. A third bearing;
6. a second bearing; 7. A first universal shaft;
701. a liquid passing hole; 702. A first gap;
703. a second energy channel; 8. A stator;
801. a first boss; 802. A second gap;
803. a third energy channel; 9. A second cardan shaft;
901. a third gap; 902. A fifth energy channel;
10. a rock breaking device joint; 1001. And a fourth energy channel.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 to 5, the present invention provides a hollow inverted screw drill which is disposed at the bottom of a drill string and is lowered into a predetermined position in a well while drilling the drill string. This cavity is put screw rod drilling tool upside down includes urceolus main part 1, transmission shaft 3, planet wobbling stator 8 is done along the circumference of urceolus main part 1 to first cardan shaft 7 and ability in urceolus main part 1, transmission shaft 3, first cardan shaft 7 and stator 8 are connected from top to bottom in proper order, and be connected through the helicitic texture cooperation respectively between the bottom of transmission shaft 3 and the top of first cardan shaft 7 and the bottom of first cardan shaft 7 and the top of stator 8, though transmission shaft 3, connect through helicitic texture respectively between first cardan shaft 7 and the stator 8, first cardan shaft 7 is under the fixed state in top, planet wobbling can be done to its bottom, and then guarantee that the stator 8 of being connected with the bottom of first cardan shaft 7 also can carry out planet wobbling. The outer cylinder main body 1 is a cylindrical structure which is arranged along the vertical direction and has two open ends, the outer cylinder main body 1 can be rotatably sleeved on the outer sides of the transmission shaft 3, the first universal shaft 7 and the stator 8, the bottom end of the outer cylinder body 1 is provided with a drill bit 2, the top end of the drill bit 2 is in matched connection with the bottom end of the outer cylinder body 1 through a threaded structure, the top end of a transmission shaft 3 is in matched connection with the bottom end of a drill string through a threaded structure, the outer wall of the transmission shaft 3 is rotatably connected with the inner wall of the outer cylinder body 1, an annular first gap 702 is reserved between the outer wall of a first universal shaft 7 and the inner wall of the outer cylinder body 1, a spiral second gap 802 is reserved between the outer wall of a stator 8 and the inner wall of the outer cylinder body, a fourth energy channel 1001 penetrating through the drill bit 2 is vertically arranged in the drill bit 2, and the first gap 702, the second gap 802 and the fourth energy channel 1001 are sequentially communicated from top to bottom; a first energy channel 302 penetrating through the transmission shaft 3 is formed in the transmission shaft 3 along the vertical direction, a second energy channel 703 penetrating through the first universal shaft 7 is formed in the first universal shaft 7 along the vertical direction, a third energy channel 803 penetrating through the stator 8 is formed in the stator 8 along the vertical direction, the first energy channel 302, the second energy channel 703, the third energy channel 803 and the fourth energy channel 1001 are sequentially communicated from top to bottom, and a liquid passing hole 701 communicating the second energy channel 703 with the first gap 702 is further formed in the first universal shaft 7; an energy supply cable on the ground can sequentially pass through the first energy channel 302, the second energy channel 703, the third energy channel 803 and the fourth energy channel 1001 and is connected with a directional energy rock breaking device in the well, and a drilling medium introduced from the ground can sequentially pass through the first energy channel 302, the liquid passing hole 701, the first gap 702, the second gap 802 and the fourth energy channel 1001 and is discharged into the well; when the drilling medium passes through the second gap 802, the drilling medium pushes the stator 8 to make planetary oscillation in the inner part of the outer cylinder body 1, and the outer cylinder body 1 makes circumferential rotation.
According to the invention, the drill bit 2 is arranged at the bottom of the outer cylinder body 1, the transmission shaft 3, the first universal shaft 7 and the stator 8 are sequentially connected inside the outer cylinder body 1 from top to bottom, the transmission shaft 3, the first universal shaft 7 and the stator 8 are respectively provided with the first energy channel 302, the second energy channel 703 and the third energy channel 803 which are sequentially communicated from top to bottom, and the drill bit 2 is provided with the fourth energy channel 1001, so that energy channels can be provided for energy supply cables such as optical fibers and the like, energy can be provided for an underground directional energy rock breaking device, and the smooth proceeding of directional energy assisted rock breaking is ensured. In addition, the transmission shaft 3 is rotatably connected with the outer cylinder body 1, a first gap 702 and a second gap 802 which are communicated with each other are respectively reserved between the first universal shaft 7 and the outer cylinder body 1 and between the stator 8 and the outer cylinder body 1, a liquid passing hole 701 which is communicated with the second energy channel 703 and the first gap 702 is arranged on the first universal shaft 7, a drilling medium introduced from the ground can smoothly pass through the outer cylinder body 1, and in the process that the drilling medium passes through the second gap 802, the stator 8 can be pushed to do planetary swing in the outer cylinder body 1, because the transmission shaft 3 is connected with the drill rod, the stator 8 is connected with the transmission shaft 3 through the first universal shaft 7, the drill rod does not circumferentially rotate per se under the working state, the stator 8 only does planetary swing in the outer cylinder body 1 under the thrust action of the drilling medium, the outer cylinder body 1 is pushed to do circumferential rotation, and the drill bit 2 at the bottom is further driven to rotate by the outer cylinder body 1, the smooth operation of mechanical rock breaking is ensured.
In the invention, because the stator 8 is arranged inside the outer cylinder body 1, the stator 8 only performs planetary swing inside the outer cylinder body 1 but does not perform circumferential rotation in the operation process, the outer cylinder body 1 drives the drill bit 2 to perform circumferential rotation, so that energy supply cables such as optical fibers and the like can conveniently and smoothly enter the underground through the first energy channel 302, the second energy channel 703, the third energy channel 803 and the fourth energy channel 1001 in sequence and are connected with the directional energy rock breaking device, the normal operation of the drill bit 2 cannot be influenced, the technical effect of reasonably and effectively combining the directional energy destructive stratum and mechanical drilling is achieved, the drilling speed is further improved, and the drilling operation efficiency is greatly improved.
Further, the drilling medium may be, but is not limited to, mud.
Further, the energy supply cable may be, but is not limited to, an optical fiber.
Further, the directional energy rock breaking device can be, but is not limited to, a fiber laser or an ultrasonic generator, and of course, other devices capable of performing directional energy rock breaking operation can be used.
In an alternative embodiment of the present invention, as shown in fig. 1 and fig. 2, the transmission shaft 3 is a cylindrical structure that is arranged along a vertical direction and has two open ends, a first bearing 4, a second bearing 6 and a third bearing 5 are sequentially arranged between the transmission shaft 3 and the outer cylinder body 1 from top to bottom, the first bearing 4 and the third bearing 5 are used for bearing a radial load of the transmission shaft 3, and the second bearing 6 is used for bearing an axial load of the transmission shaft 3, so as to ensure the stability of the connection between the transmission shaft 3 and the outer cylinder body 1, and at the same time, the outer cylinder body 1 is limited, so that the outer cylinder body 1 can only rotate along a circumferential direction and cannot swing along with the stator 8.
Further, the first bearing 4 and the third bearing 5 are both radial bearings; the second bearing 6 is a thrust bearing.
Specifically, as shown in fig. 1 and 2, the first bearing 4, the second bearing 6, and the third bearing 5 are all sleeved on the transmission shaft 3, an inner wall of the first bearing 4, an inner wall of the second bearing 6, and an inner wall of the third bearing 5 are all connected to an outer wall of the transmission shaft 3, and an outer wall of the first bearing 4, an outer wall of the second bearing 6, and an outer wall of the third bearing 5 are all connected to an inner wall of the outer cylinder body 1.
Further, as shown in fig. 1 and 2, the top end of the transmission shaft 3 extends to the upper side of the outer cylinder main body 1 and is connected with the bottom of the drill string in a matching manner through a threaded structure, an annular fishing boss 301 is arranged on the outer wall of the transmission shaft 3 above the outer cylinder main body 1 along the circumferential direction of the transmission shaft 3, and the fishing boss 301 can be clamped with a fishing tool in a matching manner, so that the screw drill can be conveniently fished.
In an optional embodiment of the present invention, as shown in fig. 1 and 3, the first universal shaft 7 is disposed in a vertical direction, the number of the liquid passing holes 701 on the first universal shaft 7 is multiple, each liquid passing hole 701 is located at the upper portion of the first universal shaft 7, and the liquid passing holes 701 are uniformly arranged along the circumferential direction of the first universal shaft 7, so as to ensure that a drilling medium can uniformly flow into the first gap 702 through each liquid passing hole 701, and further, the stator 8 can be smoothly pushed to make a planetary swing and the outer barrel body 1 can smoothly make a circumferential rotation.
Furthermore, the first universal shaft 7 is a flexible shaft universal shaft (i.e. a flexible shaft).
In an alternative embodiment of the present invention, as shown in fig. 1, 4, and 5, a plurality of spiral first bosses 801 are uniformly distributed on the outer wall of the stator 8 along the circumferential direction of the stator 8, a plurality of spiral second bosses 1031 are uniformly distributed on the inner wall of the outer cylinder main body 1 along the circumferential direction of the outer cylinder main body 1 at positions opposite to the stator 8, the spiral direction of the first bosses 801 is the same as the spiral direction of the second bosses 1031, and the number of the first bosses 801 is less than the number of the second bosses 1031, so as to form a spiral second gap 802 between the inner wall of the outer cylinder main body 1 and the outer wall of the stator 8. According to the structure, in a conventional application state, the outer cylinder main body 1 is fixed, the stator 8 can perform planetary swing in the outer cylinder main body 1 and can also perform circumferential rotation, the outer cylinder main body 1 can rotate along the circumferential direction, the stator 8 is limited through the first universal shaft 7, so that the stator 8 can only perform planetary swing in the outer cylinder main body 1, the outer cylinder main body 1 rotates along the circumferential direction under the thrust action of a drilling medium, and therefore the purpose that the outer cylinder main body 1 is driven to rotate through the planetary swing of the stator 8 is achieved, and the drill bit 2 is driven to rotate.
Specifically, as shown in fig. 5, the number of the first bosses 801 is 5, and the number of the second bosses 1031 is 6.
In an alternative embodiment of the present invention, as shown in fig. 1 and 6, the hollow reverse screw drill further includes a rock breaking device joint 10, the rock breaking device joint 10 is disposed below the stator 8, the energy supply cable sequentially passes through the first energy channel 302, the second energy channel 703 and the third energy channel 803 and then is connected to the top end of the rock breaking device joint 10, and the bottom end of the rock breaking device joint 10 passes through the fourth energy channel 1001 and is connected to the directional energy rock breaking device.
Further, a fourth gap for a drilling medium to pass through is reserved between the outer wall of the rock breaking device joint 10 and the inner wall of the fourth energy channel 1001, so that the drilling medium passing through the outer cylinder body 1 can be smoothly discharged.
Further, as shown in fig. 1 and 6, a second cardan shaft 9 is arranged between the stator 8 and the rock breaking device joint 10 in the vertical direction, the top end of the second cardan shaft 9 is connected with the bottom end of the stator 8 in a matching manner through a threaded structure, the bottom end of the second cardan shaft 9 is connected with the top end of the rock breaking device joint 10 in a matching manner through a threaded structure, a fifth energy channel 902 communicated with a third energy channel 803 is formed in the second cardan shaft 9, and the third energy channel 803 is communicated with a fourth energy channel 1001 through the fifth energy channel 902. Through the setting of second cardan shaft 9, can eliminate the planet swing of stator 8, avoid being located broken rock device joint 10 of stator 8 below and do the planet swing along with stator 8, and then guarantee that broken rock device joint 10 can break rock device stable connection with directional ability.
Further, the second universal shaft 9 is a flexible shaft (i.e., a flexible shaft).
In an alternative embodiment of the present invention, as shown in fig. 1 to 6, the outer cylinder body 1 includes a transmission shaft housing 101, a universal shaft housing 102, a rotor housing 103, and a bit joint housing 104, which are connected in sequence from top to bottom, the transmission shaft housing 101, the universal shaft housing 102, the rotor housing 103, and the bit joint housing 104 are all cylindrical structures that are arranged along a vertical direction and open at two ends, the transmission shaft 3 is located in the transmission shaft housing 101, and the first bearing 4, the second bearing 6, and the third bearing 5 are located between the transmission shaft 3 and the transmission shaft housing 101; the first cardan shaft 7 is located within the cardan shaft housing 102; the stator 8 is located in the rotor housing 103, and each second boss 1031 is disposed on the inner wall of the rotor housing 103; the second cardan shaft 9 as well as the upper part of the breaking device joint 10 are located inside the drill bit joint housing 104.
Further, the bottom of transmission shaft shell 101 is connected through the helicitic texture cooperation with the top of cardan shaft shell 102, and the bottom of cardan shaft shell 102 is connected through the helicitic texture cooperation with the top of rotor shell 103, and the bottom of rotor shell 103 is connected through the helicitic texture cooperation with the top of drill bit joint shell 104, and drill bit 2 is located the below of drill bit joint shell 104, and the top of drill bit 2 is connected through the helicitic texture cooperation with the bottom of drill bit joint shell 104.
The diameter of the middle and outer cylinder main body 1 is larger than that of a traditional screw drill, and the energy supply cables such as drilling media, optical fibers and the like can be simultaneously passed. Because the stator 8 loops through the first cardan shaft 7 and the transmission shaft 3 and is connected with the drill string, after the drilling medium is introduced into the outer barrel body 1 from the ground, under the thrust action of the drilling medium, the stator 8 can not rotate circumferentially and only swings in a planetary manner, and the rotor housing 103 can rotate circumferentially under the thrust action of the drilling medium, because the stator 8 is provided with the third energy channel 803, and the stator 8 does not rotate circumferentially, the passage of energy supply cables such as optical fibers is facilitated. Because rotor housing 103 is connected with transmission shaft housing 101 through cardan shaft housing 102, transmission shaft housing 101 can be connected with transmission shaft 3 with rotating, can make rotor housing 103 and transmission shaft housing 101 do coaxial rotation, and then replaced the circumferential direction of stator 8 through the circumferential direction of rotor housing 103, realized also can carry out the planet swing by oneself when stator 8 does not do circumferential direction, rotor housing 103 drives drill bit 2 through bit joint shell 104 and rotates. Stator 8 passes through second cardan shaft 9 and is connected with broken rock device joint 10, eliminates stator 8's planet swing through second cardan shaft 9, guarantees smooth the passing through of energy supply cables such as optic fibre and broken rock device joint 10 and the directional stable connection that can break the rock device, realizes that the directional ability destroys the stratum and combines together with mechanical drilling.
The hollow inverted screw drill has the characteristics and advantages that:
the hollow inverted screw drilling tool is characterized in that a drill bit 2 is arranged at the bottom of an outer cylinder body 1, an energy channel for an energy supply cable such as an optical fiber to pass through is formed in the outer cylinder body 1, energy can be guaranteed to be smoothly supplied to an underground directional energy rock breaking device, and the directional energy can assist in smoothly breaking rock.
The transmission shaft 3 and the outer cylinder body 1 can be rotatably connected in the hollow reverse screw drilling tool, a stator 8 capable of swinging in a planet mode is arranged inside the outer cylinder body 1, a drilling medium can push the stator 8 to swing in the planet mode in the process of passing through the outer cylinder body 1, the outer cylinder body 1 rotates in the circumferential direction, and then the drill bit 2 at the bottom is driven to rotate through the outer cylinder body 1, and smooth mechanical rock breaking is guaranteed.
Third, this cavity is put screw rod drilling tool upside down is at the operation in-process, stator 8 only does the planet swing, and does not do circumferential direction, urceolus main part 1 drives drill bit 2 and does circumferential direction, and energy supply cables such as the optic fibre of not only being convenient for pass through down to the pit smoothly, can not cause the influence to the normal operation of drill bit 2 in addition, has reached and can destroy the technical effect that stratum and mechanical drilling are reasonable, effectively combine with the orientation, further improves the drilling rate, improves well drilling operating efficiency greatly, is suitable for using widely.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (15)
1. The utility model provides a cavity is turned over and is put screw rod drilling tool, its sets up in the bottom of drilling string to along with the drilling string is gone into preset position in the well, its characterized in that, cavity is turned over and is put screw rod drilling tool and is included urceolus main part, transmission shaft, first universal shaft and can do planet wobbling stator in the urceolus main part, wherein:
the transmission shaft, the first universal shaft and the stator are sequentially connected from top to bottom, the outer cylinder main body can be rotatably sleeved on the outer sides of the transmission shaft, the first universal shaft and the stator, a drill bit is arranged at the bottom end of the outer cylinder main body, the top end of the transmission shaft is connected with the drill string, the transmission shaft is rotatably connected with the outer cylinder main body, a first clearance and a spiral second clearance which are communicated with each other are respectively reserved between the first universal shaft and the stator and between the outer cylinder main body and the outer cylinder main body, and a fourth energy channel communicated with the second clearance is formed in the drill bit; a first energy channel, a second energy channel and a third energy channel which are sequentially communicated are respectively arranged on the transmission shaft, the first universal shaft and the stator along the axial direction, and a liquid passing hole which is communicated with the second energy channel and the first gap is also arranged on the first universal shaft; an energy supply cable sequentially passes through the first energy channel, the second energy channel, the third energy channel and the fourth energy channel and is connected with a directional energy rock breaking device in the well, and a drilling medium sequentially passes through the first energy channel, the liquid passing hole, the first gap, the second gap and the fourth energy channel and is discharged into the well;
when the drilling medium passes through the second gap, the drilling medium pushes the stator to perform planetary swing in the outer cylinder main body, and the outer cylinder main body performs circumferential rotation.
2. The hollow inverted screw drill according to claim 1, wherein a first bearing and a third bearing for bearing radial load of the transmission shaft and a second bearing for bearing axial load of the transmission shaft are provided between the transmission shaft and the outer cylinder body, the first bearing, the second bearing and the third bearing are all sleeved on the transmission shaft, an inner wall of the first bearing, an inner wall of the second bearing and an inner wall of the third bearing are all connected with an outer wall of the transmission shaft, and an outer wall of the first bearing, an outer wall of the second bearing and an outer wall of the third bearing are all connected with an inner wall of the outer cylinder body.
3. The hollow inverted screw drill according to claim 2, wherein the first bearing, the second bearing and the third bearing are arranged in order from top to bottom.
4. The hollow inverted screw drill of claim 2, wherein the first bearing and the third bearing are both radial bearings; the second bearing is a thrust bearing.
5. The hollow inverted screw drill according to claim 1, wherein the top end of the transmission shaft extends above the outer cylinder body and is connected with the bottom of the drill string, and a fishing boss capable of being matched and clamped with a fishing tool is arranged on the outer wall of the transmission shaft above the outer cylinder body.
6. The hollow inverted screw drill according to claim 1, wherein the number of the fluid passing holes is plural, each fluid passing hole is located at an upper portion of the first universal shaft, and the fluid passing holes are uniformly arranged in a circumferential direction of the first universal shaft.
7. The hollow inverted screw drill of claim 1, wherein the first universal shaft is a flex shaft universal shaft.
8. The hollow inverted screw drill according to claim 1, wherein a plurality of spiral first bosses are uniformly distributed on an outer wall of the stator in a circumferential direction, a plurality of spiral second bosses are uniformly distributed on an inner wall of the outer cylinder body in a position opposite to the stator in the circumferential direction, a spiral direction of the first bosses is the same as a spiral direction of the second bosses, and the number of the first bosses is smaller than that of the second bosses, so that the second gap is formed between the inner wall of the outer cylinder body and the outer wall of the stator.
9. The hollow reverse screw drill according to claim 1, wherein a rock breaking device joint is arranged below the stator, the top end of the rock breaking device joint is connected with the energy supply cable, and the bottom end of the rock breaking device joint penetrates through the fourth energy channel and is connected with the directional energy rock breaking device.
10. The hollow inverted screw drill according to claim 9, wherein a fourth gap is left between the outer wall of the lithotripter joint and the inner wall of the fourth energy channel for the passage of drilling medium.
11. The hollow reverse screw drill according to claim 9, wherein a second cardan shaft is provided between the stator and the rock breaking device joint, the top end of the second cardan shaft is connected to the bottom end of the stator, the bottom end of the second cardan shaft is connected to the top end of the rock breaking device joint, a fifth energy passage communicated with the third energy passage is provided on the second cardan shaft, and the third energy passage is communicated with the fourth energy passage through the fifth energy passage.
12. The hollow inverted screw drill of claim 11, wherein said second cardan shaft is a flexible shaft cardan shaft.
13. The hollow inverted screw drill according to claim 11, wherein the outer barrel body comprises a transmission shaft housing, a universal shaft housing, a rotor housing and a drill bit joint housing which are sequentially connected from top to bottom, the transmission shaft housing, the universal shaft housing, the rotor housing and the drill bit joint housing are vertically arranged and are of cylindrical structures with two open ends, the transmission shaft is located in the transmission shaft housing, the first universal shaft is located in the universal shaft housing, the stator is located in the rotor housing, and the second universal shaft and the upper portion of the rock breaking device joint are both located in the drill bit joint housing.
14. The hollow inverted progressive cavity drill of claim 1, wherein said energy supply cable is an optical fiber.
15. The hollow inverted screw drill according to claim 1, wherein the directional energy rock breaking device is a fiber laser or an ultrasonic generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116357.8A CN114382404A (en) | 2020-10-19 | 2020-10-19 | Hollow inverted screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116357.8A CN114382404A (en) | 2020-10-19 | 2020-10-19 | Hollow inverted screw drill |
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| Publication Number | Publication Date |
|---|---|
| CN114382404A true CN114382404A (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011116357.8A Pending CN114382404A (en) | 2020-10-19 | 2020-10-19 | Hollow inverted screw drill |
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| CN (1) | CN114382404A (en) |
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