CN107476759B - Large-torque series motor equal-wall-thickness screw drilling tool - Google Patents
Large-torque series motor equal-wall-thickness screw drilling tool Download PDFInfo
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- CN107476759B CN107476759B CN201710926243.1A CN201710926243A CN107476759B CN 107476759 B CN107476759 B CN 107476759B CN 201710926243 A CN201710926243 A CN 201710926243A CN 107476759 B CN107476759 B CN 107476759B
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- 238000005553 drilling Methods 0.000 title claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000005060 rubber Substances 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 2
- 241001247986 Calotropis procera Species 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution 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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- 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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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a high-torque serial motor equal-wall-thickness screw drilling tool which mainly comprises a bypass valve assembly, an anti-drop assembly, a motor assembly, a universal shaft assembly I, a hollow rotor motor assembly, a universal shaft assembly II and a transmission shaft assembly.
Description
Technical Field
The invention relates to a large-torque series motor equal-wall-thickness screw drilling tool for well drilling, in particular to a large-torque series motor equal-wall-thickness screw drilling tool capable of transmitting large torque.
Background
In order to solve the torque problem of drilling deep wells, extended reach wells and horizontal wells, drilling workers begin to find a method for increasing the power and the torque of a screw drill for drilling hard formations. It has been found that this can be achieved by stringing together conventional 2-stage motors, thus creating a tandem motor, with the 1 st tandem motor driving both a conventional roller cone bit and a diamond bit at maximum rate of penetration. While the rate of penetration was increased, the life of roller cone drill bits decreased and the rate of use of tandem motors was low, polycrystalline diamond compact bits were developed in the early 80's of the 20 th century, and many companies developed low-speed, high-torque motors with individual power joints that more closely matched roller cone drill bits instead of the earlier high-speed, low-torque motors, but still encountered very difficult formations and sought to further increase the power and rotational speed of the drilling fluid motors, thus creating medium-speed motors with the required torque and rate of penetration to drive PDC bits.
The addition of another rotor-stator pair above the existing motor, which is connected by a high-strength transmission structure capable of bearing larger torque, forms the value of the series motor increased by the torque and power output of the original single motor, and connects 2 existing motors in series in proportion to the number of stages of the additional motor, which not only avoids expensive processing cost and does not need special transportation conditions, but also when in use on site, the single motor and the series motor need the same drilling fluid flow rate, and other operation parameters are basically similar except that the pressure of a vertical pipe needs to be slightly increased, therefore, the series motor is an economical and practical method for solving the problem of the high-power and large-torque motor, generally, the additional power stage of the series motor contains 2 or more stages, so that the torque and the power of the series motor are 50% higher than that of a single 4-stage motor, some designs couple 2 complete motors to achieve 2 times the output torque.
With the progress of the manufacturing technology of the screw drill, the processing and manufacturing of the lengthened motor rotor and the lengthened motor stator become possible, and a plurality of manufacturers make the whole screw to transmit and achieve the torque, but the whole lengthened motor replaces the motors connected in series, and the screw drill with high power and high torque output can be obtained. Because the stator and the rotor of the lengthened motor are longer, the lengthened motor belongs to a slender shaft processing product, the straightness and the ovality of a long rod piece processed by the existing deep hole boring machine and the deep hole drilling machine cannot meet the use requirements of a screw drilling tool, and in order to solve the problems of large torque and processing and manufacturing problems, a novel constant-wall-thickness series motor is provided and applied.
Disclosure of Invention
The purpose of the invention is: in order to solve the problems of high failure rate, low output torque and the like of the motor of the conventional screw drill, the large-torque series motor equal-wall-thickness screw drill is designed, can provide high power, high torque and high mechanical drilling speed, can work for a long time underground, reduces the drilling operation and drilling cost.
In order to achieve the purpose, the invention adopts the following technical scheme: a large-torque tandem motor equal-wall-thickness screw drilling tool mainly comprises a bypass valve assembly, an anti-drop assembly, a motor assembly, a universal shaft assembly I, a hollow rotor motor assembly, a universal shaft assembly II and a transmission shaft assembly, wherein the parts of a bypass valve shell, an anti-drop joint shell, a stator shell, a universal shaft shell and a transmission shaft shell are connected through improved double-shoulder NC56 buttons to enhance the connection strength of the shells, the tandem part comprises 2 motor assemblies with different stages and 2 universal shaft assemblies with the same size, the motor assembly is matched with a stator and a rotor with 3.5 stages, the hollow rotor motor assembly is matched with a stator and a rotor with 2 stages, and during working, the high-pressure drilling fluid consumes self water power to do work on the centering rotor and the idle rotor in the movement from the motor inlet to the motor outlet, the pressure energy of the drilling fluid is converted into the rotating mechanical energy of the hollow rotor, and the sensitivity of the output rotating speed to the bit pressure is reduced under the matching action of the solid rotor and the hollow rotor of the whole set of screw drilling tool.
The female buttons of the universal shaft upper and lower joints, the solid rotor and the hollow rotor of the universal shaft assembly I and the universal shaft upper and lower joints, the solid rotor and the hollow rotor of the large-torque serial motor equal-wall-thickness screw drilling tool are NC31 thread buttons, and 12 plug pin holes in the universal shaft assembly I and the universal shaft assembly II are formed by welding and polishing.
A series motor assembly part of big moment of torsion tandem motor equal wall thickness screw rod drilling tool is established ties by motor assembly and cavity rotor motor assembly and is constituteed, the motor assembly is by stator casing I, equal wall thickness rubber bush I, the rotor is constituteed, cavity rotor motor assembly is by stator casing II, equal wall thickness rubber bush II, the cavity rotor is constituteed, wherein stator casing I, the rotor, stator casing II, the cavity rotor is by 42CrMo machine-shaping, equal wall thickness rubber bush I, equal wall thickness rubber bush II is by hydrogenated nitrile butadiene rubber injection moulding, there is certain eccentricity e between stator casing I and rotor, stator casing II and the middle idle rotor.
A solid rotor and cavity rotor of wall thickness screw rod drilling tool such as big moment of torsion tandem motor are that the surface plates the steel screw rod of wear-resisting, corrosion resistant material, stator casing I, the processing of special type spiral lathe is passed through to the internal helicoid of stator casing II, wall thickness rubber bush II is made through special rubber when waiting, have high temperature resistant, the antifriction characteristic, the heat dispersion of rubber spare both can be improved to the bush structure of wall thickness, can increase the bonding strength of rubber surface and stator casing I and stator casing II again, even rubber can not fall to glue under great frictional force effect, fall the piece, the discharge capacity of fluid has obviously been increased simultaneously.
The hollow rotor motor assembly of the large-torque series motor equal-wall-thickness screw drilling tool is processed by a special process, and the length of a through hole in the middle of the hollow rotor motor assembly is less than 2000mm, so that the hollow rotor motor assembly can be processed by a common deep hole boring machine, and the manufacturing difficulty is reduced.
The invention has the beneficial effects that: (1) the novel drilling fluid motor is matched with a centralizer at the position close to a drill bit and is connected with the motor in series, and the drilling fluid can drill with high power, high torque and high mechanical drilling speed; (2) the second part of the invention is additionally provided with the hollow rotor for shunting, thereby increasing the total displacement of the whole machine while not increasing the rotating speed of the motor; (3) the sensitivity of the output rotating speed to the drilling pressure is reduced under the matching action of the solid rotor and the hollow rotor by the whole set of screw drilling tool, and the specific expression is as follows: the rotation speed of the motor cannot be very high without applying large drilling pressure, and the rotation speed of the motor cannot be very low when the drilling pressure is increased; (4) the invention considers the factor of prolonging the service life of the motor in the design, reduces the failure rate of the series motor compared with the conventional motor, is more reliable in use, reduces the operation of starting and running the drill, obviously reduces the drilling cost and has strong field applicability.
Drawings
Fig. 1 is a schematic structural diagram of a high-torque tandem motor equal-wall-thickness screw drill.
FIG. 2 is a schematic diagram of a motor assembly of a high torque tandem motor constant wall thickness progressive cavity drill.
FIG. 3 is a schematic diagram of a hollow motor assembly of a constant wall thickness auger drilling tool with a high torque tandem motor.
In the figure: 1. the motor comprises a bypass valve assembly, 2 a drop-proof assembly, 3 a motor assembly, 4 a universal shaft assembly I, 5 a hollow rotor motor assembly, 6 a universal shaft assembly II, 7 a transmission shaft assembly, 20 a stator shell I, 21 an equal-wall-thickness rubber bushing I, 22 a solid rotor, 23 a stator shell II, 24 an equal-wall-thickness rubber bushing II, 25 a hollow rotor.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, the present invention adopts the following technical solutions: a large-torque series hollow motor equal-wall-thickness screw drilling tool mainly comprises a bypass valve assembly 1, an anti-drop assembly 2, a motor assembly 3, a universal shaft assembly I4, a hollow rotor motor assembly 5, a universal shaft assembly II 6 and a transmission shaft assembly 7, wherein the bypass valve housing, the anti-drop joint shell, a stator shell, the universal shaft shell and the transmission shaft shell are connected in a buckled mode through improved double shoulders NC56 to enhance the connection strength of the shells, the series connection part comprises 2 motor assemblies in different stages and 2 universal shaft assemblies with the same size, the motor assembly 3 is matched with a 3.5-stage stator and a hollow rotor motor assembly 5 is matched with a 2-stage stator and a 2-stage rotor, when the large-torque series hollow motor drilling tool works on the hollow rotor 25 by consuming self water power in the process of moving from a motor inlet to an outlet, the pressure of the drilling fluid can be converted into rotary mechanical energy of the hollow rotor 25, and the sensitivity of output rotating speed to drilling pressure is reduced under the matching effect of the solid rotor 22 and the hollow rotor 25 of the whole set And the upper and lower universal shaft joints of the universal shaft assembly I4 and the universal shaft assembly II 6, the female buttons of the solid rotor 22 and the hollow rotor 25 are NC31 threaded buttons, and 12 plug pin holes in the universal shaft assembly I4 and the universal shaft assembly II 6 are formed by welding, grinding and molding.
As shown in fig. 2 and fig. 3, the series motor assembly is composed of a motor assembly 3 and a middle-idle rotor motor assembly 5 which are connected in series, the motor assembly 3 is composed of a stator housing I20, a rubber bushing I21 with equal wall thickness and a solid rotor 22, a hollow rotor motor assembly 5 is composed of a stator housing II 23, a rubber bushing II 24 with equal wall thickness and a hollow rotor 25, wherein the stator housing I20, the solid rotor 22, the stator housing II 23 and the hollow rotor 25 are formed by processing 42CrMo, the rubber bushing I22 with equal wall thickness and the rubber bushing II 24 with equal wall thickness are formed by injection molding of hydrogenated nitrile rubber, a certain eccentric distance e exists between the stator housing I20 and the solid rotor 22, between the stator housing II 23 and the middle-idle rotor 25, the solid rotor 22 and the hollow rotor 25 are steel screws with wear-resistant and corrosion-resistant materials plated on the surfaces, the inner screw surfaces of the stator housing I20 and the stator housing II 23 are processed by a special spiral machine, the equal-wall-thickness rubber bushing II 24 is made of special rubber and has high temperature resistance and friction resistance, the bushing structure with the equal wall thickness can improve the heat dissipation performance of a rubber part and increase the bonding strength of the rubber surface with the stator housing I20 and the stator housing II 23, and even if rubber does not fall off or block under the action of larger friction force, the discharge capacity of fluid is obviously increased.
As shown in fig. 3, the hollow rotor motor assembly 5 is processed by a special process, and since the length of the through hole in the middle of the hollow rotor 25 is less than 2000mm, the hollow rotor motor assembly can be processed by a common deep hole boring machine, thereby reducing the difficulty in manufacturing.
Claims (5)
1. The utility model provides a wall thickness screw rod drilling tool such as big moment of torsion tandem motor, on the whole, by bypass valve assembly (1), prevent falling assembly (2), motor assembly (3), cardan shaft assembly I (4), cavity rotor motor assembly (5), cardan shaft assembly II (6), transmission shaft assembly (7) are constituteed, bypass valve casing lower extreme and the anti-falling joint casing upper end of preventing falling assembly (2) of bypass valve assembly (1) are connected through improving two shoulders NC56 thread buckle, the anti-falling joint casing lower extreme of preventing falling assembly (2) and the stator casing I (20) upper end of motor assembly (3) are connected through improving two shoulders NC56 thread buckle, the stator casing I (20) lower extreme of motor assembly (3) and the cardan shaft casing upper end of cardan shaft assembly I (4) are connected through improving two shoulders NC56 thread buckle, the shaft casing lower extreme of cardan shaft assembly I (4) and the stator casing II (23) of rotor motor assembly (5) are through improving two shoulders NC56 The lower end of a stator shell II (23) of a hollow rotor motor assembly (5) is in threaded connection with the upper end of a universal shaft shell of a universal shaft assembly II (6) through an improved double-shoulder NC56 threaded buckle, the lower end of the universal shaft shell of the universal shaft assembly II (6) is in threaded connection with the upper end of a transmission shaft shell of a transmission shaft assembly (7) through an improved double-shoulder NC56 threaded buckle, the connection strength of the shell is enhanced, a series part comprises 2 motor assemblies (3) of different levels, a middle and middle rotor motor assembly (5), 2 universal shaft assemblies I (4) and universal shaft assemblies II (6) which are the same in size, the motor assemblies (3) are matched with a stator and a rotor of 3.5 levels, the hollow rotor motor assembly (5) is matched with a stator and a rotor of 2 levels, the motor assembly (3) comprises a stator shell I (20), a rubber bushing I (21) of equal wall thickness and a solid rotor (22), and the hollow rotor motor assembly (5) comprises a stator shell II (23), When the constant-wall-thickness rubber bushing II (24) and the hollow rotor (25) work, high-pressure drilling fluid consumes self water power to do work on the hollow rotor (25) in the process of moving from the motor inlet to the motor outlet, the pressure energy of the drilling fluid is converted into the rotary mechanical energy of the hollow rotor (25), and the sensitivity of the output rotating speed to the drilling pressure is reduced under the matching action of the solid rotor (22) and the hollow rotor (25) of the whole set of screw drilling tool.
2. The high-torque tandem motor equal-wall-thickness screw drill tool as claimed in claim 1, wherein: the female buttons of the solid rotor (22) and the hollow rotor (25), the upper joint and the lower joint of the universal shaft assembly I (4) and the universal shaft of the universal shaft assembly II (6) are both NC31 threaded buttons, and 12 plug pin holes in the universal shaft assembly I (4) and the universal shaft assembly II (6) are formed by welding and polishing.
3. The high-torque tandem motor equal-wall-thickness screw drill tool as claimed in claim 1, wherein: the stator comprises a stator shell I (20) and a solid rotor (22), wherein the stator shell II (23) and the hollow rotor (25) are formed by processing 42CrMo, and a certain eccentric distance e exists between the stator shell I (20) and the solid rotor (22) and between the stator shell II (23) and the hollow rotor (25).
4. A high torque tandem motor constant wall thickness screw drill according to claim 1 or claim 3, wherein: the solid rotor (22) and the hollow rotor (25) are steel screws with surfaces plated with wear-resistant and corrosion-resistant materials, and the rubber bushing I (21) with the same wall thickness and the rubber bushing II (24) with the same wall thickness are both formed by injection molding of hydrogenated nitrile rubber.
5. The high-torque tandem motor equal-wall-thickness screw drill tool as claimed in claim 1, wherein: the length of the through hole in the middle of the hollow rotor motor assembly (5) is less than 2000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710926243.1A CN107476759B (en) | 2017-10-06 | 2017-10-06 | Large-torque series motor equal-wall-thickness screw drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710926243.1A CN107476759B (en) | 2017-10-06 | 2017-10-06 | Large-torque series motor equal-wall-thickness screw drilling tool |
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| CN107476759A CN107476759A (en) | 2017-12-15 |
| CN107476759B true CN107476759B (en) | 2020-02-07 |
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| CN201710926243.1A Active CN107476759B (en) | 2017-10-06 | 2017-10-06 | Large-torque series motor equal-wall-thickness screw drilling tool |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109236559B (en) * | 2018-08-20 | 2021-04-30 | 中海石油(中国)有限公司上海分公司 | Screw motor and underground power drilling tool |
| CN110005336A (en) * | 2019-04-09 | 2019-07-12 | 盐城华亚石油机械制造有限公司 | A kind of coal bed gas Special wear-resistant efficient screw drill tool and processing technology |
| AU2020323312A1 (en) | 2019-07-31 | 2022-02-17 | Anderson, Charles Abernethy | Modified torque generator and methods of use |
| CN111188576A (en) * | 2020-03-26 | 2020-05-22 | 成都佳琛石油机械有限公司 | Low-energy-consumption hydraulic oscillator |
| CN111810049A (en) * | 2020-08-04 | 2020-10-23 | 西南石油大学 | Positive displacement fixed-shaft rotary underground power motor |
| CN114673444B (en) * | 2022-03-31 | 2024-02-13 | 中国石油大学(北京) | Flexible screw drilling tool and drilling method |
| CN115030654B (en) * | 2022-06-15 | 2024-01-12 | 大庆市佰昂石油科技有限公司 | Adjustable flexible screw drilling tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1430491A1 (en) * | 1983-03-25 | 1988-10-15 | Всесоюзный Научно-Исследовательский Институт Буровой Техники | Versions of hole-bottom screw-type motor |
| CN2163860Y (en) * | 1993-06-07 | 1994-05-04 | 潍坊市坊子鑫得利石油钻探成套公司 | Screw drilling tool |
| CN201526278U (en) * | 2009-09-22 | 2010-07-14 | 山东陆海石油装备有限公司 | Low-speed large-torque screw drill tool |
| CN103806832B (en) * | 2012-11-08 | 2016-03-09 | 中国石油天然气集团公司 | Well dynamic metal motor assembly |
| CN203383727U (en) * | 2013-07-17 | 2014-01-08 | 西南石油大学 | Screw drill tool with long service life and high performance |
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Effective date of registration: 20201207 Address after: 065000 No. 118 Furuo Road, Longhe Economic Development Zone, Anci District, Langfang City, Hebei Province Patentee after: Orient Energy & Technologies Co.,Ltd. Address before: No. 8 Road, Xindu Xindu District of Chengdu city of Sichuan Province in 610500 Patentee before: SOUTHWEST PETROLEUM University |
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Denomination of invention: A high torque series motor equal wall thickness screw drilling tool Effective date of registration: 20230324 Granted publication date: 20200207 Pledgee: Cangzhou Bank Co.,Ltd. Bazhou Branch Pledgor: ORIENT ENERGY & TECHNOLOGIES Co.,Ltd. Registration number: Y2023980036202 |