CN204299465U - Oil seal helicoid hydraulic motor - Google Patents
Oil seal helicoid hydraulic motor Download PDFInfo
- Publication number
- CN204299465U CN204299465U CN201420766798.6U CN201420766798U CN204299465U CN 204299465 U CN204299465 U CN 204299465U CN 201420766798 U CN201420766798 U CN 201420766798U CN 204299465 U CN204299465 U CN 204299465U
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- transmission shaft
- coil
- power transmission
- radial bearing
- hydraulic motor
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Abstract
The utility model provides a kind of oil seal helicoid hydraulic motor, comprise power transmission shaft and transmission shaft shell, power transmission shaft is arranged in transmission shaft shell, journal bearing moving-coil, cod and lower radial bearing moving-coil on power transmission shaft is provided with, upper journal bearing moving-coil is fixedly installed on above power transmission shaft, lower radial bearing moving-coil is fixedly installed on below power transmission shaft, and cod is arranged between journal bearing moving-coil and lower radial bearing moving-coil; The oil seal helicoid hydraulic motor of the application, analysing in depth and studying the open power transmission shaft operation principle of existing helicoid hydraulic motor and affecting on the basis of mechanism in service life, the structure of conventional open screw drill transmission shaft part is improved, at the top and bottom design and installation oil seal structure of power transmission shaft upper and lower two ends journal bearing, the axis and the journal bearing that realize power transmission shaft are lubricated by lubricating oil, each group of bearing is all worked under desirable lubricating status, thus reaches the object improving helicoid hydraulic motor service life.
Description
Technical field
The utility model belongs to oil, Gas Industry drilling well well dynamic instrument, particularly a kind of oil seal helicoid hydraulic motor.
Background technology
Helicoid hydraulic motor is widely used in oil, Natural Gas Drilling Operation, and it is the main well dynamic instrument of oil drilling and well workover.Helicoid hydraulic motor is using the high-pressure slurry that is pressed into through drill pipe bore from well head as power liquid, and the pressure energy of high-pressure slurry is converted to the mechanical energy of bit, it is the indispensable drilling tool of the special oil wells such as current brill directional well, cluster well, horizontal well.Along with the development of modern drilling technology, especially along with the popularization of modern combination drilling technology, the market demand of helicoid hydraulic motor increases sharply.The service life of helicoid hydraulic motor is the important indicator weighing helicoid hydraulic motor performance, the raising in helicoid hydraulic motor life-span, promotes minimizing, transfers drilling tool operations number and time, shortens drilling period, improve drilling efficiency, reduce drillng operation cost important role.
Helicoid hydraulic motor mainly comprises: by-pass valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly.By-pass valve assembly is positioned at motor assembly upper end, and allow mud to enter helicoid hydraulic motor by by-pass prot when lower brill, during trip-out, the mud in helicoid hydraulic motor gushes from by-pass prot, and mud is not overflow on drilling platforms.Motor assembly is made up of helical stator, helical rotor, the high-pressure slurry entering motor acts in the die cavity between stator and rotor, due to the change of volume, the helicoid of rotor produces rotating torque, drive rotor to do planetary motion in stator die cavity, realize high-pressure slurry pressure energy and be converted to rotor rotating mechanical energy.The effect of universal drive shaft assembly is the System of Rotating about Fixed Axis motion planetary motion of rotor being converted to power transmission shaft, and the motion of motor and moment of torsion are passed to power transmission shaft.The rotary motion that universal drive shaft transmission comes by driving-shaft assembly and moment of torsion export to the drill bit installed helicoid hydraulic motor lower end, this assembly subjects huge axis from drill bit and radial load, and driving-shaft assembly is most important in helicoid hydraulic motor just because of this is also the weakest parts.
Power transmission shaft is supported by upper and lower two groups of journal bearings and one group of middle cod, and these three groups of bearings carry huge drilling well shock loading while support power transmission shaft rotary motion.On the helicoid hydraulic motor of routine, these three groups of bearings work in high-pressure slurry, lubricated it by mud.Mud is while lubricate, and minute solid phase particle wherein also accelerates the wearing and tearing of bearing, and this operation principle of driving-shaft assembly is exactly the main cause causing its working life shorter.
Summary of the invention
Utility model object: the utility model provides a kind of oil seal helicoid hydraulic motor, its objective is the problem that the serious wear leaning on mud lubricate to cause existing for solution conventional screw drilling tool, working life are shorter.
Technical scheme:
A kind of oil seal helicoid hydraulic motor, comprise power transmission shaft and transmission shaft shell, power transmission shaft is arranged in transmission shaft shell, it is characterized in that: journal bearing moving-coil, cod and lower radial bearing moving-coil are installed on power transmission shaft, upper journal bearing moving-coil is fixedly installed on above power transmission shaft, lower radial bearing moving-coil is fixedly installed on below power transmission shaft, and cod is arranged between journal bearing moving-coil and lower radial bearing moving-coil; Upper journal bearing moving-coil arranged outside has the upper radial bearing static ring of drive fixing with transmission shaft shell, and lower radial bearing moving-coil arranged outside has the lower radial bearing Jing Quan fixing with transmission shaft shell; Power transmission shaft carry by the cooperation of each bearing sound circle in transmission shaft shell, form the lubricating cavity for oil lubrication between upper journal bearing moving-coil and upper radial bearing static ring of drive, between lower radial bearing Jing Quan and lower radial bearing moving-coil, form the lubricating cavity for oil lubrication; Top between upper journal bearing moving-coil and upper radial bearing static ring of drive or transmission shaft shell is provided with the upper end sealing device of lubricating cavity and outer wall being isolated, and is also provided with the lower end sealing device by lubricating cavity and external isolation between lower radial bearing moving-coil and the quiet circle of lower radial bearing.
Advantage and effect: the utility model provides a kind of oil seal helicoid hydraulic motor, the oil seal helicoid hydraulic motor of the application, analysing in depth and studying the open power transmission shaft operation principle of existing helicoid hydraulic motor and affecting on the basis of mechanism in service life, the structure of conventional open screw drill transmission shaft part is improved, at the top and bottom design and installation oil seal structure of power transmission shaft upper and lower two ends journal bearing, the axis and the journal bearing that realize power transmission shaft are lubricated by lubricating oil, each group of bearing is all worked under desirable lubricating status, thus reach the object improving helicoid hydraulic motor service life.
In this application, do not change the material of conventional open screw drill transmission shaft bearing pair, just on the basis of conventional open screw drill transmission shaft structure, on power transmission shaft, the upper end of journal bearing and lower radial bearing lower end are designed respectively, are installed two cover sealing devices, this two covers sealing device can prevent mud from entering on the bearing of driving-shaft assembly inside effectively, also can prevent leaking of internal lubrication oil, thus ensure that the inner three groups of bearings of power transmission shaft work under good lubricating condition, make it not by grinding and the corrosion of minute solid phase particle in mud.Reduced the wearing and tearing of bearing pair by this measure improving the work of power transmission shaft internal bearings and lubrication environment, improve the service life of driving-shaft assembly.
Oil seal transmission shaft service wear process and the advantageous effect of the utility model oil seal helicoid hydraulic motor are described as follows:
Initial shift: the following period of time that the true lubrication stage starts in new drilling tool drilling well work, sealing device is working properly, sealing effectiveness is good, and lubricating oil carries out normally good lubrication to each group of bearing pair in the annular seal space of driving-shaft assembly, and the wearing and tearing of bearing pair are very little;
Second working stage: the mixed lubrication stage is after drilling tool work a period of time, power transmission shaft is under huge drilling well impact force action, it axially damages sealing device with radial severe impact athletic meeting, when sealing device be in slightly leak, half failure state time, a small amount of slurry compounding is in the closed cavity of power transmission shaft, greasy filth mixed lubrication body is formed with lubricating oil original in inner chamber, now by mixed lubrication body, bearing pair is lubricated, though its lubricant effect is not as the true lubrication stage, also than the high lubricating effect in pure mud lubrication stage;
3rd working stage: mud lubrication stage helicoid hydraulic motor work on until sealing device entirely ineffective after, high-pressure slurry unobstructedly enters into closed cavity completely, the lubricant of bearing pair becomes pure mud, lubrication mechanism, the rate of wear of this stage bearing are completely identical with the situation of conventional screw drilling tool with service life, bearing wear speed.
As can be seen here, its lubrication mechanism under the state that oil seal screw drill transmission shaft of the present utility model lost efficacy at sealing device, the rate of wear are also identical with the situation of conventional screw drilling tool normal operating condition, in addition the initial shift that the rate of wear is less and the longer normal service life of the second working stage, visible oil seal helicoid hydraulic motor of the present utility model compares conventional screw drilling tool more long life and incomparable technical advantage.。
accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model.
In figure, 1-water cap; 2-power transmission shaft; The upper journal bearing moving-coil of 3-; The upper end sealing device of 4-; The upper radial bearing static ring of drive of 5-; 6-cod; 7-transmission shaft shell; 8-lower radial bearing Jing Quan; 9-lower radial bearing moving-coil; 10-lower end sealing device.
detailed description of the invention:below in conjunction with Fig. 1, the utility model is described further:
As shown in Figure 1, the utility model provides a kind of oil seal helicoid hydraulic motor, comprise power transmission shaft 2 and transmission shaft shell 7, power transmission shaft 2 is arranged in transmission shaft shell 7, power transmission shaft 2 is provided with journal bearing moving-coil 3, cod 6 and lower radial bearing moving-coil 9, upper journal bearing moving-coil 3 is fixedly installed on above power transmission shaft 2, and lower radial bearing moving-coil 9 is fixedly installed on below power transmission shaft 2, and cod 6 is arranged between journal bearing moving-coil 3 and lower radial bearing moving-coil 9; Upper journal bearing moving-coil 3 arranged outside has the upper radial bearing static ring of drive 5 fixing with transmission shaft shell 7, and lower radial bearing moving-coil 9 arranged outside has the lower radial bearing quiet circle 8 fixing with transmission shaft shell 7; Power transmission shaft 2 carry by the cooperation of each bearing sound circle in transmission shaft shell 7, form the lubricating cavity for oil lubrication between upper journal bearing moving-coil 3 and upper radial bearing static ring of drive 5, between the quiet circle 8 of lower radial bearing and lower radial bearing moving-coil 9, form the lubricating cavity for oil lubrication; Top between upper journal bearing moving-coil 3 and upper radial bearing static ring of drive 5 is provided with the upper end sealing device 4 of lubricating cavity and outer wall being isolated, and is also provided with the lower end sealing device 10 by lubricating cavity and external isolation between lower radial bearing moving-coil 9 and the quiet circle 8 of lower radial bearing.
As shown in Figure 1: the by-pass valve assembly 111 upper end stacks of helicoid hydraulic motor upper end, the high-pressure slurry in by-passing valve is entered through drill pipe bore, the rotor of CD-ROM drive motor assembly 222 carries out planetary motion, the planetary motion of rotor is converted to the System of Rotating about Fixed Axis motion of power transmission shaft 2 by universal drive shaft assembly 333, the motion of motor and moment of torsion are passed to power transmission shaft 2, and the rotary motion that universal drive shaft transmission comes by driving-shaft assembly and moment of torsion export to the drill bit installed helicoid hydraulic motor lower end.
The each bearing of high-pressure slurry and inside is isolated by sealing mechanism that on driving-shaft assembly, end sealing device 4 and lower end sealing device 10 form effectively, driving-shaft assembly inside is made to form closed cavity, in inner chamber, upper journal bearing moving-coil 3 forms journal bearing group with upper radial bearing static ring of drive 5, the quiet circle 8 of lower radial bearing forms lower radial bearing group with lower radial bearing moving-coil 9, these two groups of bearing group connection cods 6 totally three groups of bearings are lubricated by lubricating oil, reduce solid phase particles in high-pressure slurry to the wearing and tearing of each group of bearing and erosion speed, the normal service life of driving-shaft assembly is significantly improved, thus improve the whole service life of helicoid hydraulic motor.
The utility model is by the upper-lower seal apparatus structure of design oil seal transmission shaft assembly, the each bearing in driving-shaft assembly annular seal space is made to carry out work under good Oil Lubrication Condition, it is rational in infrastructure, sealing is reliable, power transmission shaft long service life, well solve each bearing wear existing for conventional open screw drill transmission shaft structure, the problems such as erosion speed fast and service life is short, the overall normal service life of helicoid hydraulic motor is increased, thus reduce lifting, transfer the drilling tool time, improve the operating efficiency of drilling well, shorten drilling period, reduce drillng operation cost, be suitable at oil, promote the use of in Natural Gas Drilling Operation.
Claims (1)
1. an oil seal helicoid hydraulic motor, comprise power transmission shaft (2) and transmission shaft shell (7), power transmission shaft (2) is arranged in transmission shaft shell (7), it is characterized in that: upper journal bearing moving-coil (3), cod (6) and lower radial bearing moving-coil (9) are installed on power transmission shaft (2), upper journal bearing moving-coil (3) is fixedly installed on power transmission shaft (2) top, lower radial bearing moving-coil (9) is fixedly installed on power transmission shaft (2) below, and cod (6) is arranged between journal bearing moving-coil (3) and lower radial bearing moving-coil (9); Upper journal bearing moving-coil (3) arranged outside has the upper radial bearing static ring of drive (5) fixing with transmission shaft shell (7), and lower radial bearing moving-coil (9) arranged outside has the lower radial bearing Jing Quan (8) fixing with transmission shaft shell (7); Power transmission shaft (2) carry by the cooperation of each bearing sound circle in transmission shaft shell (7), form the lubricating cavity for oil lubrication between upper journal bearing moving-coil (3) and upper radial bearing static ring of drive (5), between lower radial bearing Jing Quan (8) and lower radial bearing moving-coil (9), form the lubricating cavity for oil lubrication; Top between upper journal bearing moving-coil (3) and upper radial bearing static ring of drive (5) or transmission shaft shell (7) is provided with the upper end sealing device (4) of lubricating cavity and outer wall being isolated, and is also provided with the lower end sealing device (10) by lubricating cavity and external isolation between lower radial bearing moving-coil (9) and lower radial bearing Jing Quan (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766798.6U CN204299465U (en) | 2014-12-09 | 2014-12-09 | Oil seal helicoid hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420766798.6U CN204299465U (en) | 2014-12-09 | 2014-12-09 | Oil seal helicoid hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204299465U true CN204299465U (en) | 2015-04-29 |
Family
ID=53105011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420766798.6U Expired - Fee Related CN204299465U (en) | 2014-12-09 | 2014-12-09 | Oil seal helicoid hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204299465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533281A (en) * | 2014-12-09 | 2015-04-22 | 沈阳工业大学 | Oil seal PDM (positive displacement motor) drill |
-
2014
- 2014-12-09 CN CN201420766798.6U patent/CN204299465U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533281A (en) * | 2014-12-09 | 2015-04-22 | 沈阳工业大学 | Oil seal PDM (positive displacement motor) drill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20181209 |