CN112593929A - Motor type mud pulse generator - Google Patents
Motor type mud pulse generator Download PDFInfo
- Publication number
- CN112593929A CN112593929A CN202011488086.9A CN202011488086A CN112593929A CN 112593929 A CN112593929 A CN 112593929A CN 202011488086 A CN202011488086 A CN 202011488086A CN 112593929 A CN112593929 A CN 112593929A
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- Prior art keywords
- assembly
- motor
- direct current
- ball screw
- current motor
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- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 14
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
- E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Acoustics & Sound (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a motor type mud pulse generator which comprises a power and transmission device, a pressure balance module and a lower assembly. The power and transmission device consists of a driver module, a brushless direct current motor, a speed reducer, a coupling, a ball screw, a locking nut and a spline shaft sleeve assembly shaft; the pressure balancing module consists of a balancing piston and a corresponding rod piece; the lower component consists of a valve body outer cylinder, a screen, a valve seat component, a large piston joint and a screw rod outer cylinder. The invention adopts the combination work of the DC brushless motor and the ball screw to replace the work of the electromagnetic valve, the motor is a rotary driving part, the ball screw can convert the rotary motion into the linear motion, the linear motion of pulling up and putting down the small valve head can be realized through the matching of the motor and the ball screw, and the working force can be greatly improved. Meanwhile, the motor lead screw has the characteristics of low current and low power consumption when working.
Description
Technical Field
The invention relates to the technical field of petroleum drilling engineering, in particular to a motor type mud pulse generator.
Background
During petroleum drilling, especially drilling of wells with complex structures such as horizontal wells, extended reach wells, branch wells and the like, various downhole parameters needing to be known in real time by well site personnel are completed by a Measurement While Drilling (MWD) system
At present, the information transmission method of measurement while drilling mainly has four methods: the cable method, the slurry pulse method, the acoustic wave method and the electromagnetic wave method have limitations and application ranges, and the slurry pulse method is most widely and reliably applied. The mud pulse method is divided into three transmission modes of negative pulse, positive pulse and continuous wave, and the most widely applied positive pulse transmission mode is adopted at present.
The transmission mode of the mud pulse determines the structural form of the pulser, wherein the hydraulic drive reciprocating signal generator with the pilot control is the most common form of the mud positive pulse transmission mode. In the traditional structure, a hydraulic control circuit drives a main throttle valve to reciprocate to generate a pressure pulse signal, and the medium of the hydraulic control circuit can be drilling fluid or hydraulic oil. The pilot valve action is accomplished by the electro-magnet mostly, and power consumption is big, and the fault rate is high.
The mud pulser is the most heavy of MWD, and the performance of the mud pulser is improved, so that the mud pulser has the advantages of simple structure, convenience in maintenance, energy conservation and durability, and is a necessary trend in instrument development.
Disclosure of Invention
The present invention is directed to a motor-type mud pulse generator, which solves the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a motor type mud pulse generator comprises a power and transmission device, a pressure balance module and a lower assembly, wherein the power and transmission device comprises a driver module, a brushless direct current motor, a coupler, a ball screw, a limiting joint assembly, a spline shaft assembly and a speed reducer; the motor comprises a shaft coupler, a spline shaft assembly, a driver module, a speed reducer, a brushless direct current motor, a driver module and a ball screw, wherein the shaft coupler is connected with the spline shaft assembly, the shaft coupler is in transmission connection with the ball screw, the spline shaft assembly is in transmission connection with the brushless direct current motor, the brushless direct current motor is in transmission connection with the speed reducer, the brushless direct current motor is installed in a motor outer barrel, the driver module is electrically connected with the brushless direct current motor, and;
the pressure balancing module consists of a balancing piston, a valve seat assembly and a valve rod assembly; the valve rod assembly is arranged on the valve seat assembly, and the balance piston is arranged outside a valve rod in the valve rod assembly;
the lower component comprises a valve body outer barrel, a screen, a large piston joint and a lead screw outer barrel, the large piston joint is installed at the end part of the valve body outer barrel, the screen is installed on the inner wall of the valve body outer barrel, and the lead screw outer barrel is connected with the valve body outer barrel through a limiting joint component.
Preferably, the screw outer cylinder is connected with the motor outer cylinder through a fixed joint component.
Preferably, the adjusting device further comprises an adjusting sleeve and a locking nut, wherein the locking nut is installed on the coupler, and the adjusting sleeve is installed outside the coupler.
Preferably, a lower plug assembly is installed between the motor outer cylinder and the pressure-bearing outer cylinder, a high-pressure-bearing sealing joint is installed on one side of the lower plug assembly, and an axial buffer is installed on one side of the high-pressure-bearing sealing joint.
Preferably, the driver module is connected to an external controller via a wiring assembly.
Preferably, the using method comprises the following steps:
A. when the instrument works normally at the bottom of a well, the driver module controls the brushless direct current motor to work, the ball screw converts the rotation of the direct current motor into linear motion, and the shaft coupling and the spline shaft assembly drive the valve rod assembly to act;
B. the mud enters the cavity of the lower component through the apertures of the screen and is moved by the balance piston to balance the oil chamber pressure. After a certain time, the driver module controls the brushless direct current motor to work, and the ball screw (9) converts the rotation of the direct current motor into linear motion;
C. the shaft coupling and the spline shaft component drive the valve rod component to act to plug the cavity of the lower valve seat component, and a cycle is completed.
Compared with the prior art, the invention has the beneficial effects that: the invention discloses a motor type mud pulse generator, wherein a motor drives transmission rotation, and a ball screw converts the rotation motion into linear motion. The ball screw has high transmission efficiency, is completely immersed in hydraulic oil, has smaller mechanical wear, and can realize maintenance-free operation under the reasonable service life. The setting of balanced piston not only can play the sealed effect of isolation mud, can also be with the leading-in pressure to the compression cylinder inside of mud, be inside and outside pressure balance, inside and outside pressure keeps unanimous basically, in order to keep somewhere enough big space for motor and other parts at the motor urceolus, under the less prerequisite of wall thickness, very big promotion compression cylinder's compressive capacity. Therefore, the wireless measurement-while-drilling device has the advantages of simple structure, reliable work, electric quantity saving, suitability for a wireless measurement-while-drilling system and capability of solving the problems of high fault rate and high electric power consumption of the measurement-while-drilling device.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1. big piston connects, 2, the disk seat subassembly, 3, the screen cloth, 4, the valve body urceolus, 5, balanced piston, 6, the valve rod subassembly, 7, spacing joint subassembly, 8, the lead screw urceolus, 9, ball, 10, fixed joint subassembly, 11, the adjusting collar, 12, lock nut, 13, the shaft coupling, 14, spline shaft housing subassembly, 15, the motor urceolus, 16, brushless DC motor, 17, the speed reducer, 18, lower end cap subassembly, 19, high pressure-bearing sealing joint, 20, axial buffer, 21, the pressure-bearing urceolus, 22, the driver module, 23, the wiring subassembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present invention provides a technical solution: a motor type mud pulse generator comprises a power and transmission device, a pressure balance module and a lower assembly, wherein the power and transmission device comprises a driver module 22, a brushless direct current motor 16, a coupler 13, a ball screw 9, a limit joint assembly 7, a spline shaft assembly 14 and a speed reducer 17; the shaft coupling 13 is connected with a spline shaft assembly 14, the shaft coupling 13 is in transmission connection with a ball screw 9, the spline shaft assembly 14 is in transmission connection with a brushless direct current motor 16, the brushless direct current motor 16 is in transmission connection with a speed reducer 17, the brushless direct current motor 16 is installed in a motor outer barrel 15, the driver module 22 is electrically connected with the brushless direct current motor 16, the driver module 22 is connected with an external controller through a wiring assembly 23, the ball screw 9 is installed in a screw outer barrel 8, and the screw outer barrel 8 is connected with the motor outer barrel 15 through a fixed joint assembly 10;
the pressure balancing module consists of a balancing piston 5, a valve seat assembly 2 and a valve rod assembly 6; the valve rod assembly 6 is arranged on the valve seat assembly 2, and the balance piston 5 is arranged outside a valve rod in the valve rod assembly 6; the pressure balance module balances the pressure inside and outside the valve body outer cylinder 4 and the balance piston 5, mud balances the pressure inside and outside the cavity through the screen 3, and the pressure balance piston 5 is filled with hydraulic oil.
The lower component is composed of a valve body outer barrel 4, a screen 3, a large piston joint 1 and a lead screw outer barrel 8, the large piston joint 1 is installed at the end part of the valve body outer barrel 4, the screen 3 is installed on the inner wall of the valve body outer barrel 4, and the lead screw outer barrel 8 is connected with the valve body outer barrel 4 through a limiting joint component 7.
The invention also comprises an adjusting sleeve 11 and a locking nut 12, wherein the locking nut is arranged on the coupler 13, and the adjusting sleeve 11 is arranged outside the coupler 13.
In the invention, a lower plug assembly 18 is arranged between a motor outer cylinder 15 and a pressure-bearing outer cylinder 21, a high pressure-bearing sealing joint 19 is arranged at one side of the lower plug assembly 18, and an axial buffer 20 is arranged at one side of the high pressure-bearing sealing joint 19.
In the invention, after the output shaft of the brushless direct current motor 16 passes through the coupler and the spline shaft assembly 14 through the speed reducer 17, the ball screw 9 converts the rotary motion into linear motion, and the ball screw is completely immersed in hydraulic oil.
The invention is arranged in a non-magnetic drill collar when working underground, and the using method comprises the following steps:
A. when the instrument works normally at the bottom of a well, the driver module 22 controls the brushless direct current motor 16 to work, the ball screw 9 converts the rotation of the direct current motor 16 into linear motion, and the shaft coupling 13 and the spline shaft assembly 14 drive the valve rod assembly 6 to act;
B. the mud enters the cavity of the lower assembly through the apertures of the screen 3 and is moved by the balance piston 5 to balance the oil chamber pressure. After a certain time, the driver module 22 controls the brushless direct current motor 16 to work, and the ball screw 9 converts the rotation of the direct current motor 16 into linear motion;
C. the shaft coupling 13 and the spline shaft assembly 14 drive the valve rod assembly 6 to act, so that the cavity of the lower valve seat assembly is blocked, and a cycle is completed.
When the method is applied, the method needs to work with other modules of the wireless measurement while drilling system. And generating mud pressure fluctuation, and decoding by the ground system according to the detected pressure fluctuation to obtain measurement while drilling and logging data.
In summary, in the motor-type mud pulse generator disclosed by the invention, the motor drives the transmission to rotate, and the ball screw converts the rotary motion into the linear motion. The ball screw has high transmission efficiency, is completely immersed in hydraulic oil, has smaller mechanical wear, and can realize maintenance-free operation under the reasonable service life. The setting of balanced piston not only can play the sealed effect of isolation mud, can also be with the leading-in pressure to the compression cylinder inside of mud, be inside and outside pressure balance, inside and outside pressure keeps unanimous basically, in order to keep somewhere enough big space for motor and other parts at the motor urceolus, under the less prerequisite of wall thickness, very big promotion compression cylinder's compressive capacity. Therefore, the wireless measurement-while-drilling device has the advantages of simple structure, reliable work, electric quantity saving, suitability for a wireless measurement-while-drilling system and capability of solving the problems of high fault rate and high electric power consumption of the measurement-while-drilling device.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. An electric machine mud pulser, said pulser comprising a power and transmission device, a pressure balancing module, and a lower assembly, wherein: the power and transmission device consists of a driver module (22), a brushless direct current motor (16), a coupler (13), a ball screw (9), a limiting joint assembly (7), a spline shaft assembly (14) and a speed reducer (17); the motor is characterized in that the coupler (13) is connected with a spline shaft assembly (14), the coupler (13) is in transmission connection with a ball screw (9), the spline shaft assembly (14) is in transmission connection with a brushless direct current motor (16), the brushless direct current motor (16) is in transmission connection with a speed reducer (17), the brushless direct current motor (16) is installed in a motor outer cylinder (15), the driver module (22) is electrically connected with the brushless direct current motor (16), and the ball screw (9) is installed in a screw outer cylinder (8);
the pressure balancing module consists of a balancing piston (5), a valve seat assembly (2) and a valve rod assembly (6); the valve rod assembly (6) is arranged on the valve seat assembly (2), and the balance piston (5) is arranged outside a valve rod in the valve rod assembly (6);
the lower part subassembly comprises valve body urceolus (4), screen cloth (3), big piston joint (1) and lead screw urceolus (8), install in valve body urceolus (4) tip big piston joint (1), screen cloth (3) are installed in valve body urceolus (4) inner wall, lead screw urceolus (8) are connected through spacing joint subassembly (7) with valve body urceolus (4).
2. An electromechanical mud pulser according to claim 1, wherein: the screw rod outer cylinder (8) is connected with the motor outer cylinder (15) through a fixed joint component (10).
3. An electromechanical mud pulser according to claim 1, wherein: the coupler is characterized by further comprising an adjusting sleeve (11) and a locking nut (12), wherein the locking nut is installed on the coupler (13), and the adjusting sleeve (11) is installed outside the coupler (13).
4. An electromechanical mud pulser according to claim 1, wherein: a lower plug assembly (18) is arranged between the motor outer cylinder (15) and the pressure-bearing outer cylinder (21), a high-pressure-bearing sealing joint (19) is arranged on one side of the lower plug assembly (18), and an axial buffer (20) is arranged on one side of the high-pressure-bearing sealing joint (19).
5. An electromechanical mud pulser according to claim 1, wherein: the driver module (22) is connected to an external controller via a connection assembly (23).
6. Use of an electromechanical mud pulse generator according to claim 1, characterized in that: the using method comprises the following steps:
A. when the instrument works normally at the bottom of a well, the driver module (22) controls the brushless direct current motor (16) to work, the ball screw (9) converts the rotation of the direct current motor (16) into linear motion, and the shaft coupling (13) and the spline shaft assembly (14) drive the valve rod assembly (6) to act;
B. the mud enters the cavity of the lower assembly through the apertures of the screen (3) and is moved by the balance piston (5) to balance the oil chamber pressure. After a certain time, the driver module (22) controls the brushless direct current motor (16) to work, and the ball screw (9) converts the rotation of the direct current motor (16) into linear motion;
C. the shaft coupling (13) and the spline shaft assembly (14) drive the valve rod assembly (6) to act to block the cavity of the lower valve seat assembly, and a cycle is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488086.9A CN112593929A (en) | 2020-12-16 | 2020-12-16 | Motor type mud pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488086.9A CN112593929A (en) | 2020-12-16 | 2020-12-16 | Motor type mud pulse generator |
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| Publication Number | Publication Date |
|---|---|
| CN112593929A true CN112593929A (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011488086.9A Pending CN112593929A (en) | 2020-12-16 | 2020-12-16 | Motor type mud pulse generator |
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| Country | Link |
|---|---|
| CN (1) | CN112593929A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389542A (en) * | 2021-06-08 | 2021-09-14 | 成都多贝石油工程技术有限公司 | Novel stratified water injection pulse generation system |
| CN113882847A (en) * | 2021-09-27 | 2022-01-04 | 辽宁天鑫石油设备科技有限公司 | Underground tool face adjusting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389542A (en) * | 2021-06-08 | 2021-09-14 | 成都多贝石油工程技术有限公司 | Novel stratified water injection pulse generation system |
| CN113882847A (en) * | 2021-09-27 | 2022-01-04 | 辽宁天鑫石油设备科技有限公司 | Underground tool face adjusting device |
| CN113882847B (en) * | 2021-09-27 | 2024-03-26 | 北京六合伟业科技股份有限公司 | Downhole tool face adjusting device |
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