CN111794673A - Power drilling tool with power generation function - Google Patents
Power drilling tool with power generation function Download PDFInfo
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- CN111794673A CN111794673A CN202010476631.6A CN202010476631A CN111794673A CN 111794673 A CN111794673 A CN 111794673A CN 202010476631 A CN202010476631 A CN 202010476631A CN 111794673 A CN111794673 A CN 111794673A
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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
- E21B4/02—Fluid rotary type drives
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C2/00—Rotary-piston engines
- F03C2/08—Rotary-piston engines of intermeshing-engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a power drilling tool with a power generation function. The technical scheme is as follows: one end of the motor is connected with the bypass valve, the other end of the motor is connected with the universal shaft, the other end of the universal shaft is connected with the generator through the radial bearing and the rectifying circuit, and the other end of the generator is sequentially connected with the thrust bearing and the transmission shaft; the bypass valve is arranged at the end part of the motor, and when the drill pipe is drilled, drilling fluid in a well hole is introduced into the drill pipe column through the bypass valve, so that the resistance in the drilling process is reduced, and the pressure of the fluid columns inside and outside the drill pipe is balanced; when the drilling is started, the drilling fluid flows into the annular space from the inside of the drill string through the side valve hole of the bypass valve, so that the drilling fluid cannot overflow the well platform; the generator is used as an independent unit to be connected in series in the power drilling tool. The invention has the beneficial effects that: firstly, the power drilling tool has the function of an underground generator on the basis of completing the original function of the power drilling tool by adding the generator; secondly, the applicable electric power can be transmitted to the instrument through a rectifying circuit and a power transmission line; can effectively replace lithium batteries for power supply.
Description
Technical Field
The invention relates to the technical field of well drilling, in particular to a power drilling tool with a power generation function.
Background
With the development of the petroleum drilling industry, in the process of drilling deep wells, horizontal wells and multilateral wells under complex geological conditions, underground measurement while drilling instruments, rotary steering instruments and the like play a vital role, the functions of the underground measurement while drilling instruments and the rotary steering instruments are stronger and stronger, and more sensors and control execution mechanisms are used. In the working process of the instrument, power is generally required to be supplied to a downhole electronic measurement assembly and a guide control module in a rotary guide system. One conventional way is to use a high temperature resistant lithium battery, and another preferred way is to use a mud generator.
The existing lithium battery power supply has the defects of poor high temperature resistance, small output electric power, possible explosion when the operation is improper and the like; the slurry generator is monopolized by foreign technologies, is high in price, is immature in the technology of the domestic slurry generator, is low in product power and short in service life, cannot meet the requirements of more underground measuring instruments and long in measuring time, and lacks a safe and reliable power supply means for supplying power to the underground instruments.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a power drilling tool with a power generation function, wherein a power drilling tool rotor is used for driving a generator rotor to generate power, so that the problems that the lithium battery has poor high-temperature resistance in power supply, the output electric power is small, the lithium battery can explode when the operation is improper, the foreign technology of a slurry generator is monopolized, the domestic slurry generator technology is immature, the product power is low, and the service life is short are solved.
The invention provides a power drilling tool with a power generation function, which adopts the technical scheme that: the power generation device comprises a bypass valve (1), a motor (2), a universal shaft (3), a radial bearing (4), a rectifying circuit (5), a power generator (6), a thrust bearing (7), a transmission shaft (8) and a power transmission line (16), wherein one end of the motor (2) is connected with the bypass valve (1), the other end of the motor is connected with the universal shaft (3), the other end of the universal shaft (3) is connected to the power generator (6) through the radial bearing (4) and the rectifying circuit (5), and the other end of the power generator (6) is sequentially connected with the thrust bearing (7) and the transmission;
the bypass valve (1) is arranged at the end part of the motor (2), and when the drill pipe is drilled down, drilling fluid in a well is introduced into a drill pipe column through the bypass valve (1), so that the resistance in the drilling down process is reduced, and the pressures of an inner liquid column and an outer liquid column of the drill pipe are balanced; when drilling, drilling fluid flows into the annular space from the inside of the drill string through the side valve hole of the bypass valve (1), so that the drilling fluid cannot overflow the well platform; when the drilling tool works, high-pressure drilling fluid flows through the bypass valve (1) to convert pressure energy into mechanical energy;
the motor (2) consists of a motor shell (21), a motor rotor (22) and stator rubber (23), wherein the motor rotor (22) is a left-handed screw, the stator rubber (23) is a rubber-lined steel pipe, an inner hole of the stator rubber (23) is spiral, the motor rotor (22) is arranged in the inner hole of the stator rubber (23), and the motor rotor (22) is forced to continuously move in the stator rubber (23) under the action of liquid with pressure energy;
the universal shaft (3) comprises a universal shaft shell (31) and a universal shaft shell lining layer (32), and the eccentric motion of the motor is converted into the fixed shaft rotation of the transmission shaft, and meanwhile, the torque is transmitted to the transmission shaft, so that the aim of drilling is fulfilled;
the generator (6) is composed of a generator stator (52), a generator rotor (54) and a generator sealing shell (56) and is connected in series in a power drilling tool as an independent unit, the generator rotor (54) is mainly composed of a conductive rotor winding and a magnetic conductive iron core and is connected with a transmission shaft, the outer wall of the generator stator (52) is connected with the generator sealing shell (56), the generator sealing shell (56) plays the roles of isolating mud, protecting the generator and a rectifying circuit, and the cooling of the generator is realized by flowing mud;
the rectifying circuit (5) is a circuit for converting alternating current energy into direct current energy, is arranged in a sealed shell (56) of the generator and is respectively connected with the generator and the power transmission line (16), alternating current led out from an electric brush of the generator enters the power transmission line (16) after being rectified, and the power transmission line is transmitted to a joint of the power drill and an underground instrument along the shell of the power drill.
Preferably, the bypass valve (1) consists of a valve body (11), a valve core (12), a side valve hole (13), a spring (14) and a valve sleeve (15), the valve core (12) is arranged in an inner cavity of the valve body (11), the lower side of the valve core (12) is matched with the valve sleeve (15) through the spring (14), the side valve hole (13) is formed in the valve body (11) on the outer side of the valve core (12), and high-pressure mud can enter the side valve hole (13) to push the valve core (12) away and enter the inner cavity of the valve body (11).
Preferably, the generator (6) can be connected in series at any position where the power drill motor reaches the drill bit.
Preferably, the connection mode of the generator rotor of the generator (6) and the transmission shaft can be that an independent unit is connected with the transmission shaft or sleeved on the transmission shaft of the power drilling tool, and the mode that the generator rotor is sleeved on the transmission shaft can be any one or combination of a plurality of modes of threads, splines and polygons.
Preferably, the connection mode of the generator stator of the generator (6) and the sealed shell can be any one or combination of a plurality of modes of threads, splines and polygons;
the connection mode of the generator sealed shell and the transmission shaft shell can be that an independent unit is connected with the transmission shaft shell, and the generator sealed shell can also be embedded in the transmission shaft shell, and the embedding mode can be any one or combination of a plurality of modes of threads, splines and polygons.
Preferably, the material of the generator sealing shell of the generator (6) can be steel, plastic or ceramic, and the generator sealing shell can play a role in isolating mud to protect the generator and the rectifying circuit.
Preferably, the cooling of the generator (6) is achieved by flowing slurry, the slurry flowing through the centre of the drive shaft cools the rotor of the generator, and the slurry flowing back between the seal housing and the drive shaft housing and over the annular space cools the stator of the generator.
Preferably, the power transmission line (16) is embedded between a radial bearing static ring (41) and a shell of the transmission shaft (8) at a radial bearing (4), an interlayer between a universal shaft shell (31) and a universal shaft shell lining (32) of the universal shaft (3) is embedded at the universal shaft (3), a stator rubber (23) is embedded at a motor (2), the power transmission line is embedded at a bypass valve (1) through an axial drilling hole of a valve body (11), and a joint end face (71) at the end part is connected by adopting an electrode (72) or a contact (73) with a double-ring structure.
Preferably, the motor may be a screw drill or a turbine drill.
The invention has the following beneficial effects:
firstly, the power drilling tool has the function of an underground generator on the basis of completing the original function of the power drilling tool by adding the generator;
secondly, the applicable electric power can be transmitted to the instrument through a rectifying circuit and a power transmission line;
thirdly, the power drilling tool has good reliability as a mature product, and the problems of immature technology, low product power and short service life of the underground generator can be effectively solved by using the power drilling tool to drive the generator to generate electricity, so that reliable guarantee is provided for the work of an underground instrument;
fourthly, the lithium battery can be effectively replaced for power supply, and the problems of poor high temperature resistance, small output electric power and possible explosion when the operation is improper are solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of the bypass valve construction;
FIG. 3 is a schematic view of the motor construction;
FIG. 4 is a schematic structural view of a cardan shaft;
FIG. 5 is a schematic structural view of a drive shaft;
FIG. 6 is a schematic cross-sectional view of a generator;
FIG. 7 is a schematic diagram of a double-ring structure electrode of a joint end face of a power transmission line;
FIG. 8 is a schematic view of a contact structure electrode on the end face of a joint of a power transmission line;
in the upper diagram: a bypass valve 1, a motor 2, a universal shaft 3, a radial bearing 4, a rectification circuit 5, a generator 6, a thrust bearing 7 and a transmission shaft 8,
a valve body 11, a valve core 12, a valve hole 13, a spring 14, a valve sleeve 15, a power transmission line 16,
The transmission shaft comprises a transmission shaft shell 51, a generator stator 52, a slurry channel 53, a generator rotor 54, a generator sealing shell 56, a transmission shaft center hole 57, a joint end face 71, an electrode 72 and a contact 73.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
the bypass valve 1 is arranged at the end part of the motor 2, and when the drill pipe is drilled down, drilling fluid in a well is introduced into a drill pipe column through the bypass valve 1, so that the resistance in the drilling down process is reduced, and the pressure of an inner liquid column and an outer liquid column of the drill pipe is balanced; when drilling, drilling fluid flows into the annular space from the drill string through the side valve hole of the bypass valve 1, so that the drilling fluid cannot overflow the well platform; when the drilling tool works, high-pressure drilling fluid flows through the bypass valve 1 to convert pressure energy into mechanical energy;
the motor 2 consists of a motor shell 21, a motor rotor 22 and stator rubber 23, wherein the motor rotor 22 is a left-handed screw, the stator rubber 23 is a rubber-lined steel pipe, an inner hole of the stator rubber 23 is spiral, the motor rotor 22 is arranged in the inner hole of the stator rubber 23, and the motor rotor 22 is forced to continuously move in the stator rubber 23 under the action of liquid with pressure energy;
the universal shaft 3 comprises a universal shaft shell 31 and a universal shaft shell lining 32, and the eccentric motion of a motor is converted into the fixed shaft rotation of a transmission shaft, and simultaneously, the torque is transmitted to the transmission shaft, so that the aim of drilling is fulfilled;
the generator 6 is composed of a generator stator 52, a generator rotor 54 and a generator sealing shell 56, and is used as an independent unit to be connected in series in a power drilling tool, the generator rotor 54 is mainly composed of a conductive rotor winding and a magnetic conductive iron core and is connected with a transmission shaft, the outer wall of the generator stator 52 is connected with the generator sealing shell 56, the generator sealing shell 56 plays the roles of isolating mud and protecting a generator and a rectifying circuit, and the cooling of the generator is realized by flowing mud;
the rectifying circuit 5 is a circuit for converting alternating current electric energy into direct current electric energy, is arranged in a sealed shell 56 of the generator, is respectively connected with the generator and the power transmission line 16, alternating current led out from an electric brush of the generator enters the power transmission line 16 after being rectified, and the power transmission line is transmitted to a joint of a power drill and an underground instrument along a shell of the power drill.
Referring to the attached figure 2, the bypass valve 1 provided by the invention comprises a valve body 11, a valve core 12, a side valve hole 13, a spring 14 and a valve sleeve 15, wherein the inner cavity of the valve body 11 is provided with the valve core 12, the lower side of the valve core 12 is matched with the valve sleeve 15 through the spring 14, the valve body 11 on the outer side of the valve core 12 is provided with the side valve hole 13, and high-pressure slurry can enter the side valve hole 13 to push away the valve core 12 and enter the inner cavity of the valve body.
Preferably, the generator sealing housing of the generator 6 may be made of steel, plastic or ceramic, and may function to isolate the slurry from protecting the generator and the rectifying circuit.
Preferably, the cooling of the generator 6 is achieved by flowing slurry through the centre of the drive shaft to cool the rotor of the generator and through the space between the seal housing and the drive shaft housing and back up the annulus to cool the stator of the generator.
Referring to fig. 2-4, the power transmission line 16 of the present invention is embedded between the radial bearing stationary ring 41 and the casing of the transmission shaft 8 at the radial bearing 4, is embedded in the interlayer between the universal shaft casing shell 31 and the universal shaft casing lining 32 of the universal shaft 3 at the universal shaft 3, is embedded in the stator rubber 23 at the motor 2, is embedded in the by-pass valve 1 through the axial drilling of the valve body 11, and adopts the electrode 72 with a double-ring structure at the joint end face 71 at the end, referring to fig. 7.
Preferably, the motor may be a screw drill or a turbine drill.
The double-layer universal shaft shell consists of a shell and a lining, and the shell has the functions of bearing strength, protecting the universal shaft, controlling deflection orientation and the like; the outer shell is respectively connected with the lower end of the motor stator shell and the upper end of the transmission shaft shell through upper and lower threads, and the lining layer protects and fixes the power transmission line and prevents the power transmission line from being eroded by slurry and is connected with the outer shell;
the thrust bearing consists of a seat ring, a shaft ring and a steel ball and is used for bearing the combined force of the drilling pressure in the working state, the axial force generated by the pressure drop of a motor and a drill bit and the axial force of the weight of a rotor, a universal shaft, a transmission shaft and the like.
The transmission shaft comprises a water cap, a transmission shaft shell, a radial bearing, a generator and a thrust bearing group, and is used for transmitting the rotating torque of the motor to the drill bit and simultaneously bearing the axial load and the radial load generated by the bit pressure;
the radial bearings are divided into an upper group and a lower group, the main function is to bear the bending load caused by the planetary motion of the rotor and the lateral force generated when the drill bit rotates, the upper radial bearing has the function of limiting the flow of the drilling fluid, and the upper radial bearing allows a proper amount of drilling fluid to flow out of the motor to pass through the bearing assembly, so that the bearings are cooled and lubricated.
The using process of the invention is as follows:
in the drilling process, high-pressure mud from a ground mud pump is conveyed to a bypass valve 1 of a power drilling tool through a drill string, a valve core 12 moves downwards under the action of mud pressure by the bypass valve 1 to close a side valve hole 13, the mud enters a motor 2 at the moment, when pressure fluid with certain energy enters a sealed cavity formed by a motor rotor 22 and stator rubber 23, the motor rotor 22 rotates around the axis of the stator rubber 23 under the driving of the pressure mud to finish the conversion of liquid pressure energy into mechanical energy, a universal shaft 33 connects the motor rotor 22 which performs planetary motion with a transmission shaft 8 which performs fixed shaft rotation, the plane planetary motion of the motor rotor 22 is converted into the fixed shaft rotation of the transmission shaft 8, and the output torque and the rotating speed of the motor 2 are transmitted to a drill bit through the transmission shaft 8; meanwhile, as the hollow hexagon of the generator rotor 54 is sleeved on the transmission shaft 8, and the excircle hexagon of the generator stator 52 is connected with the transmission shaft shell 51, the generator stator 52 does not rotate in the rotation process of the generator rotor 54, the winding of the generator rotor 54 cuts the magnetic force lines of the magnet of the generator stator 52 to generate current, the current is transmitted to the rectifying circuit 5 through the electric brush to be rectified into direct current, the direct current is transmitted to the joint end face through the electric transmission line 16, the electrode 72 of the joint end face is contacted with the electrode of the joint end face of the measuring instrument, and the electric power output by the generator.
the bypass valve 1 is arranged at the end part of the motor 2, and when the drill pipe is drilled down, drilling fluid in a well is introduced into a drill pipe column through the bypass valve 1, so that the resistance in the drilling down process is reduced, and the pressure of an inner liquid column and an outer liquid column of the drill pipe is balanced; when drilling, drilling fluid flows into the annular space from the drill string through the side valve hole of the bypass valve 1, so that the drilling fluid cannot overflow the well platform; when the drilling tool works, high-pressure drilling fluid flows through the bypass valve 1 to convert pressure energy into mechanical energy;
the motor 2 consists of a motor shell 21, a motor rotor 22 and stator rubber 23, wherein the motor rotor 22 is a left-handed screw, the stator rubber 23 is a rubber-lined steel pipe, an inner hole of the stator rubber 23 is spiral, the motor rotor 22 is arranged in the inner hole of the stator rubber 23, and the motor rotor 22 is forced to continuously move in the stator rubber 23 under the action of liquid with pressure energy;
the universal shaft 3 comprises a universal shaft shell 31 and a universal shaft shell lining 32, and the eccentric motion of a motor is converted into the fixed shaft rotation of a transmission shaft, and simultaneously, the torque is transmitted to the transmission shaft, so that the aim of drilling is fulfilled;
the generator 6 is composed of a generator stator 52, a generator rotor 54 and a generator sealing shell 56, and is used as an independent unit to be connected in series in a power drilling tool, the generator rotor 54 is mainly composed of a conductive rotor winding and a magnetic conductive iron core and is connected with a transmission shaft, the outer wall of the generator stator 52 is connected with the generator sealing shell 56, the generator sealing shell 56 plays the roles of isolating mud and protecting a generator and a rectifying circuit, and the cooling of the generator is realized by flowing mud;
the rectifying circuit 5 is a circuit for converting alternating current electric energy into direct current electric energy, is arranged in a sealed shell 56 of the generator, is respectively connected with the generator and the power transmission line 16, alternating current led out from an electric brush of the generator enters the power transmission line 16 after being rectified, and the power transmission line is transmitted to a joint of a power drill and an underground instrument along a shell of the power drill.
The difference from example 1 is that: referring to fig. 8, the power transmission line 16 of the invention is embedded between the radial bearing static ring 41 and the casing of the transmission shaft 8 at the radial bearing 4, is embedded in an interlayer between the universal shaft casing shell 31 and the universal shaft casing lining 32 of the universal shaft 3 at the universal shaft 3, is embedded in the stator rubber 23 at the motor 2, is embedded in the bypass valve 1 through an axial drilling hole of the valve body 11, and adopts a contact 73 structure on the joint end face 71 of the end, referring to fig. 8.
The using process of the invention is as follows:
in the drilling process, high-pressure mud from a ground mud pump is conveyed to a bypass valve 1 of a power drilling tool through a drill string, a valve core 12 moves downwards under the action of mud pressure by the bypass valve 1 to close a side valve hole 13, the mud enters a motor 2 at the moment, when pressure fluid with certain energy enters a sealed cavity formed by a motor rotor 22 and stator rubber 23, the motor rotor 22 rotates around the axis of the stator rubber 23 under the driving of the pressure mud to finish the conversion of liquid pressure energy into mechanical energy, a universal shaft 33 connects the motor rotor 22 which performs planetary motion with a transmission shaft 8 which performs fixed shaft rotation, the plane planetary motion of the motor rotor 22 is converted into the fixed shaft rotation of the transmission shaft 8, and the output torque and the rotating speed of the motor 2 are transmitted to a drill bit through the transmission shaft 8; meanwhile, as the hollow hexagon of the generator rotor 54 is sleeved on the transmission shaft 8, and the excircle hexagon of the generator stator 52 is connected with the transmission shaft shell 51, the generator stator 52 does not rotate in the rotation process of the generator rotor 54, the winding of the generator rotor 54 cuts the magnetic force lines of the magnet of the generator stator 52 to generate current, the current is transmitted to the rectifying circuit 5 through the electric brush to be rectified into direct current, the direct current is transmitted to the joint end face through the electric transmission line 16, the electrode 72 of the joint end face is contacted with the contact 73 of the joint end face of the measuring instrument, and the electric power output by the generator.
referring to fig. 6, the generator 6 of the present invention can be connected in series to any position where the power drill motor reaches the drill bit, and the connection mode of the generator rotor of the generator 6 and the transmission shaft can be an independent unit connected with the transmission shaft or sleeved on the power drill transmission shaft, and the mode of the generator rotor sleeved on the transmission shaft can be any one or a combination of several modes of threads, splines and polygons.
In addition, the connection mode of the generator stator of the generator 6 and the sealed shell can be any one or combination of a plurality of modes of screw threads, splines and polygons;
the connection mode of the generator sealed shell and the transmission shaft shell can be that an independent unit is connected with the transmission shaft shell, and the generator sealed shell can also be embedded in the transmission shaft shell, and the embedding mode can be any one or combination of a plurality of modes of threads, splines and polygons.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a power drilling tool with power generation function, characterized by: the power generation device comprises a bypass valve (1), a motor (2), a universal shaft (3), a radial bearing (4), a rectifying circuit (5), a power generator (6), a thrust bearing (7), a transmission shaft (8) and a power transmission line (16), wherein one end of the motor (2) is connected with the bypass valve (1), the other end of the motor is connected with the universal shaft (3), the other end of the universal shaft (3) is connected to the power generator (6) through the radial bearing (4) and the rectifying circuit (5), and the other end of the power generator (6) is sequentially connected with the thrust bearing (7) and the transmission;
the bypass valve (1) is arranged at the end part of the motor (2), and when the drill pipe is drilled down, drilling fluid in a well is introduced into a drill pipe column through the bypass valve (1), so that the resistance in the drilling down process is reduced, and the pressures of an inner liquid column and an outer liquid column of the drill pipe are balanced; when drilling, drilling fluid flows into the annular space from the inside of the drill string through the side valve hole of the bypass valve (1), so that the drilling fluid cannot overflow the well platform; when the drilling tool works, high-pressure drilling fluid flows through the bypass valve (1) to convert pressure energy into mechanical energy;
the motor (2) consists of a motor shell (21), a motor rotor (22) and stator rubber (23), wherein the motor rotor (22) is a left-handed screw, the stator rubber (23) is a rubber-lined steel pipe, an inner hole of the stator rubber (23) is spiral, the motor rotor (22) is arranged in the inner hole of the stator rubber (23), and the motor rotor (22) is forced to continuously move in the stator rubber (23) under the action of liquid with pressure energy;
the universal shaft (3) comprises a universal shaft shell (31) and a universal shaft shell lining layer (32), and the eccentric motion of the motor is converted into the fixed shaft rotation of the transmission shaft, and meanwhile, the torque is transmitted to the transmission shaft, so that the aim of drilling is fulfilled;
the generator (6) is composed of a generator stator (52), a generator rotor (54) and a generator sealing shell (56) and is connected in series in a power drilling tool as an independent unit, the generator rotor (54) is mainly composed of a conductive rotor winding and a magnetic conductive iron core and is connected with a transmission shaft, the outer wall of the generator stator (52) is connected with the generator sealing shell (56), the generator sealing shell (56) plays the roles of isolating mud, protecting the generator and a rectifying circuit, and the cooling of the generator is realized by flowing mud;
the rectifying circuit (5) is a circuit for converting alternating current energy into direct current energy, is arranged in a sealed shell (56) of the generator and is respectively connected with the generator and the power transmission line (16), alternating current led out from an electric brush of the generator enters the power transmission line (16) after being rectified, and the power transmission line is transmitted to a joint of the power drill and an underground instrument along the shell of the power drill.
2. The power drill with the power generating function as claimed in claim 1, wherein: the bypass valve (1) is composed of a valve body (11), a valve core (12), a side valve hole (13), a spring (14) and a valve sleeve (15), the valve core (12) is arranged in an inner cavity of the valve body (11), the lower side of the valve core (12) is matched with the valve sleeve (15) through the spring (14), the side valve hole (13) is formed in the valve body (11) on the outer side of the valve core (12), and high-pressure mud can enter the side valve hole (13) to push the valve core (12) away and enter the inner cavity of the valve body (11).
3. The power drill with the power generating function as claimed in claim 1, wherein: the generator (6) can be connected in series at any position where the power drill motor reaches the drill bit.
4. The power drill with the power generating function as claimed in claim 1, wherein: the connection mode of the generator rotor of the generator (6) and the transmission shaft can be that an independent unit is connected with the transmission shaft or sleeved on the transmission shaft of the power drilling tool, and the mode that the generator rotor is sleeved on the transmission shaft can be any one or the combination of a plurality of modes of threads, splines and polygons.
5. The power drill with the power generating function as claimed in claim 1, wherein: the connection mode of the generator stator of the generator (6) and the sealed shell can be any one or combination of a plurality of modes of threads, splines and polygons;
the connection mode of the generator sealed shell and the transmission shaft shell can be that an independent unit is connected with the transmission shaft shell, and the generator sealed shell can also be embedded in the transmission shaft shell, and the embedding mode can be any one or combination of a plurality of modes of threads, splines and polygons.
6. The power drill with the power generating function as claimed in claim 1, wherein: the material of the generator sealing shell of the generator (6) can be steel, plastic or ceramic, and the effect of isolating mud to protect the generator and the rectifying circuit can be achieved.
7. The power drill with the power generation function as claimed in any one of claims 3 to 6, wherein: the cooling of the generator (6) is realized by flowing slurry, the slurry flowing through the center of the transmission shaft cools the rotor of the generator, and the slurry flowing through the space between the sealed shell and the transmission shaft shell and returning on the annular space cools the stator of the generator.
8. The power drill with the power generating function as claimed in claim 1, wherein: the power transmission line (16) is embedded between a radial bearing static ring (41) and a shell of a transmission shaft (8) at a radial bearing (4), an interlayer between a universal shaft shell (31) of a universal shaft (3) and a universal shaft shell lining (32) is embedded at the universal shaft (3), a stator rubber (23) is embedded at a motor (2), the side-through valve (1) is embedded through an axial drilling hole of a valve body (11), and a joint end face (71) at the end part is connected by adopting an electrode (72) or a contact (73) with a double-circular-ring structure.
9. The power drill with the power generating function as claimed in claim 1, wherein: the motor can be a screw drill or a turbine drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010476631.6A CN111794673A (en) | 2020-05-29 | 2020-05-29 | Power drilling tool with power generation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010476631.6A CN111794673A (en) | 2020-05-29 | 2020-05-29 | Power drilling tool with power generation function |
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| Publication Number | Publication Date |
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| CN111794673A true CN111794673A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010476631.6A Pending CN111794673A (en) | 2020-05-29 | 2020-05-29 | Power drilling tool with power generation function |
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| CN (1) | CN111794673A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302855A (en) * | 2020-11-02 | 2021-02-02 | 长江大学 | Underground power generation device and power generation method |
| CN114499040A (en) * | 2020-11-11 | 2022-05-13 | 中国石油天然气股份有限公司 | Underground power generation and flow measurement integrated device for wireless layered water injection |
-
2020
- 2020-05-29 CN CN202010476631.6A patent/CN111794673A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302855A (en) * | 2020-11-02 | 2021-02-02 | 长江大学 | Underground power generation device and power generation method |
| CN112302855B (en) * | 2020-11-02 | 2022-02-15 | 长江大学 | Underground power generation device and power generation method |
| CN114499040A (en) * | 2020-11-11 | 2022-05-13 | 中国石油天然气股份有限公司 | Underground power generation and flow measurement integrated device for wireless layered water injection |
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Effective date of registration: 20220130 Address after: 100029 Chaoyang District, Beijing Hui Xin Street six, Twelfth level. Applicant after: SINOPEC OILFIELD SERVICE Corp. Applicant after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant after: Sinopec Jingwei Co.,Ltd. Applicant after: Shengli directional well company of Sinopec Jingwei Co.,Ltd. Address before: 100101 twelfth floor, No. 16, Huixin East Street, Chaoyang District, Beijing Applicant before: SINOPEC OILFIELD SERVICE Corp. Applicant before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant before: DRILLING WELL ENGINEERING TECHNOLOGY COMPANY OF SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. |
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