CN104632978B - Drilling machine drilling buffering device - Google Patents
Drilling machine drilling buffering device Download PDFInfo
- Publication number
- CN104632978B CN104632978B CN201510060080.4A CN201510060080A CN104632978B CN 104632978 B CN104632978 B CN 104632978B CN 201510060080 A CN201510060080 A CN 201510060080A CN 104632978 B CN104632978 B CN 104632978B
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- piston
- coil
- working cylinder
- piston rod
- discharge orifice
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/46—Maintenance
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a drilling machine drilling buffering device which comprises a working cylinder and a piston rod. A piston with the T-shaped longitudinal section is connected to the tail end of the piston rod in a threaded mode. Two semicircular baffles are hinged to the tail end of the vertical portion of the piston. A plurality of upper drainage holes are formed in the horizontal portion of the piston. The two baffles are provided with a plurality of lower drainage holes corresponding to the upper drainage holes. The diameter of the upper drainage holes is gradually increased from the middle to the two ends. A coil is arranged in the middle of the piston. During working, the diameter of the drainage holes is gradually increased from the middle to the two ends, so that the middles of the drainage holes are necked down, the grasping force of magnetorheological fluid at the upper and lower ends of the necking-down part on the piston is increased, and meanwhile the starting and stopping motion of the piston inside the working cylinder is achieved through rapid conversion of external voltage; due to the fact that no throttling valves with the variable throttling area is installed, the mechanical wear resistance of the drilling machine drilling buffering device is greatly improved, and the service life of the drilling machine drilling buffering device is prolonged.
Description
Technical field
The present invention relates to a kind of damping device, specifically refer to a kind of rig and creep into buffer unit.
Background technology
In oil drilling, drive drilling tool fractured rock, creep into underground, get out the well of prescribed depth, obtain oil or natural gas for oil production machine or gas production machine.One conventional oilRigMainly it is made up of engine, driver, working machine and auxiliary equipment.In order to hoist and transfer drilling tool, setting of casing and control the pressure of the drill, be sent into drilling tool, drilling tool is equipped with hoisting system；Hoisting system includes the various instruments such as winch, auxiliary brake, overhead traveling crane, tourist bus, hook, steel wire rope and suspension ring, elevator, tongs, slips.When hoisting, winch drum lay winding wire ropes, overhead traveling crane and tourist bus composition auxiliary pulley group, hook rises through the instrument such as suspension ring, elevator and realizes the lifting of drilling tool；When transferring, drilling tool or casing string decline by deadweight, by braking mechanism and the lowering velocity of auxiliary brake control hook of winch.When normally creeping into, being realized the lifting of drilling tool by the instrument such as suspension ring, elevator, when transferring, drilling tool or casing string decline by deadweight, by braking mechanism and the lowering velocity of auxiliary brake control hook of winch；When normally creeping into, controlled the feed rate of drilling tool by braking mechanism, a part for drilling tool weight is applied on drill bit realize broken rock as the pressure of the drill.
For alleviating the workload of drilling tool further; damping device is installed between drill body and motive power outputting apparatus; applied stress is reduced when the lithosphere that drilling tool and hardness are bigger interacts to facilitate; reach to protect the purpose of drilling tool; but during general damping device uses; it mostly is passive control, i.e. uses oil gas or the amortisseur of fluid spring structure, the most adjustable.These adjustable shock absorbers change flow area by the openings of sizes of regulation throttle orifice, carry out damping adjusting coefficient with this, and the damping force of output changes with the stroke of amortisseur upper piston；But must realize by reducing the stroke of restriction and increase piston when tackling bigger impact, result makes the drilling tool quality when creeping into increase；And during long-term use, when reaching the service life of coil, existing damping device is typically directly directly to be changed by whole piston portion, though simply direct, replacement cost is relatively big, is unfavorable for using and promotes.
Summary of the invention
It is an object of the invention to provide a kind of rig and creep into buffer unit so that it is there is good damping characteristic to adapt to its fast drilling of oil well in complicated geological stratification, facilitate the Maintenance and Repair of coil simultaneously.
The purpose of the present invention is achieved through the following technical solutions:
A kind of rig creeps into buffer unit, the piston rod that the working cylinder airtight including two ends and end cap and its end through working cylinder are placed in working cylinder, at the threaded piston having longitudinal section to be T-shape of described piston-rod end, the vertical portion end of piston is hinged with two semicircular baffle plates, and in piston upper end, packing ring is installed, in piston, the nut for fixed piston and baffle plate is installed, the horizontal part of piston has discharge orifice on multiple, two baffle plates have the lower discharge orifice that multiple and upper discharge orifice is corresponding, the aperture of described upper discharge orifice is incremented by two ends by middle part, the middle part of piston is provided with coil, it is provided with cage ring on online ring outer wall, the inner hollow of piston rod, the connection wire of coil is connected through the inside of piston rod with extraneous power supply；Also including floating piston, described floating piston will be separated into liquid chambers and air cavity inside working cylinder, is filled with magnetic flow liquid in liquid chambers, is filled with the nitrogen of compression in air cavity.nullWhen the present invention works，The upper end of piston rod is connected with fixing with motive power outputting apparatus，And the lower end of working cylinder is fixed with drilling tool and is connected，When drilling tool works，Coil is connected with external power source by wire，By the regulation of electric current，Coil produces changes of magnetic field at liquid chamber，Have an effect with the magnetic flow liquid in liquid chambers in the magnetic field of change，And then change by the viscosity of the magnetic flow liquid in the upper discharge orifice of piston upper end entrance，And then change the size of damping force，Reach the purpose of drilling tool damping，And owing to the stroke of piston rod is less，The bottom of working cylinder floating piston is installed and by working cylinder inside be separated into two parts，I.e. liquid chambers and air cavity，The compressed nitrogen with certain initial pressure it is filled with in air cavity，Can the change in volume of effective replenisher body cavity，Make it have good damping characteristic to adapt to its fast drilling of oil well in complicated geological stratification，Reach to protect the purpose of drilling tool；
Wherein, the aperture of described upper discharge orifice is incremented by two ends by middle part, existing damping device then changes flow area by the openings of sizes of regulation throttle orifice, damping adjusting coefficient is carried out with this, the damping force of output changes with the stroke of amortisseur upper piston, but must realize by reducing the stroke of restriction and increase piston when tackling bigger impact, result makes the drilling tool quality when creeping into increase；nullWhen the present invention works，Magnetic flow liquid flows through the two ends up and down of piston by upper discharge orifice，I.e. realize magnetic flow liquid circulation in liquid chambers，Under extraneous power supply regulation and control，Coil is made to produce changes of magnetic field in liquid chambers，And changes of magnetic field causes the viscosity of magnetic flow liquid，And the aperture of upper discharge orifice is incremented by two ends by middle part，I.e. realize the middle reducing of upper discharge orifice，The grasp of piston is increased at the upper and lower two ends of reducing by magnetic flow liquid，Lower discharge orifice is then common through hole，Make piston smooth outflow in magnetic flow liquid，Reduce piston movement in liquid chambers and pause and transition in rhythm or melody sense occurs，Ensure piston quick stop motion in liquid chambers，Simultaneously by the rapid conversion of external voltage，Realize piston start and stop campaign in working cylinder，And then realize the shock-absorbing function of drilling tool，The choke valve variable owing to not installing orifice size，And then substantially increase the mechanical wear resistance energy of device，Extend the service life of the present invention；nullThe piston bottom end chain connection that the present invention is "T"-shaped in longitudinal section has two baffle plates，Coil and cage ring are then set on the vertical portion of piston，Threaded engagement by nut Yu piston rod end，Coil and cage ring are fixed by two baffle plates，And on baffle plate, have the lower discharge orifice corresponding with upper discharge orifice，During piston moves down with piston rod magnetic flow liquid by discharge orifice gap between the vertical portion and working cylinder inwall of piston flow under in discharge orifice，Under the control of external voltage，Changes of magnetic field is produced after coil is charged，To increase or to reduce piston damping force in liquid chambers，When the useful life of coil expires or is impaired，Can directly open end cap to be taken out by piston，Make baffle plate parallel with the vertical portion of piston by rotating nut，Quickly coil can be taken out and change，And then avoid piston integral replacing directly，Greatly reduce the use cost of this device.
Described coil includes first coil and the second coil being electrically connected to each other, and is provided with spacing block between first coil and the second coil.nullCoil is operationally，Coil produce the magnetic line of force from one end of piston through magnetic flow liquid，Pass through working cylinder，Piston is returned to from the other end of piston，Form the flux loop of a Guan Bi，In whole loop，The magnetic line of force is perpendicular to magnetic flow liquid and is parallel to working cylinder，The magnetic flux density now worked is higher，The relatively low easy generation magnetic flux supersaturation of pcrmeability due to work，The magnetic field intensity affecting whole magnetic circuit increases，The magnetic induction scope of magnetic flow liquid job requirement cannot be met，The present invention is provided with two coils that are identical and that be electrically connected to each other，I.e. first coil and the second coil，And between first coil with the second coil, be equipped with spacing block superpose to reduce the magnetic flux line between two coils，Make the Distribution of Magnetic Field around piston uniform，Prevent piston in damping environment the damping force stress raisers that are subject to and cause piston impaired，And then improve the service life of piston.
Described first coil is contrary with the direction of winding of described second coil.As preferably, first coil is set to contrary with the direction of winding of the second coil, make in the two ends up and down of liquid chambers inner carrier are in two different magnetic field environments, it is ensured that in the start and stop motor process of piston, be rapidly achieved stable duty, improve the damping performance of drilling tool.
Also including upper lift ring and lower lift ring, and upper lift ring is fixed on piston rod upper end, lower lift ring is fixed on the bottom of working cylinder.By upper lift ring and lower lift ring so that shock-damping structure is rapidly secured on drilling tool and motive power outputting apparatus, and facilitates the dismounting of shock-damping structure to overhaul, reduce the working strength of workman, reduce the consumption of non-working time.
Also including sealing ring and O grommet type seal, described sealing ring is arranged on the inwall of end cap the axial seal for piston rod, and described O grommet type seal is arranged on floating piston the isolation for air cavity Yu liquid chambers.For preventing the leakage of magnetic flow liquid, the part contacted with working cylinder when piston axially-movable is provided with sealing gasket, avoid causing the viscosity in liquid chambers to be not enough to support piston because magnetic flow liquid runs off, the O grommet type seal installed on floating piston can prevent magnetic flow liquid to be snapped down to air cavity by liquid chambers, improves the compressed nitrogen support degree to floating piston in air cavity.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the aperture of the upper discharge orifice of the present invention is incremented by two ends by middle part, i.e. realize the middle reducing of upper discharge orifice, the grasp of piston is increased at the upper and lower two ends of reducing by magnetic flow liquid, ensure piston quick stop motion in liquid chambers, simultaneously by the rapid conversion of external voltage, realize piston start and stop campaign in working cylinder, and then realize the shock-absorbing function of drilling tool, the choke valve variable owing to not installing orifice size, and then substantially increase the mechanical wear resistance energy of device, extend the service life of the present invention；
2, the present invention is provided with two coils that are identical and that be electrically connected to each other, i.e. first coil and the second coil, and between first coil with the second coil, be equipped with spacing block superpose to reduce the magnetic flux line between two coils, make the Distribution of Magnetic Field around piston uniform, prevent piston in damping environment the damping force stress raisers that are subject to and cause piston impaired, and then improve the service life of piston；
3, first coil is set to contrary with the direction of winding of the second coil by the present invention, make in the two ends up and down of liquid chambers inner carrier are in two different magnetic field environments, ensure to be rapidly achieved stable duty in the start and stop motor process of piston, improve the damping performance of drilling tool.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Labelling and corresponding parts title in accompanying drawing:
Discharge orifice, 18-baffle plate under 1-upper lift ring, 2-end cap, 3-sealing ring, 4-working cylinder, 5-piston rod, 6-packing ring, the upper discharge orifice of 7-, 8-cage ring, 9-coil, 10-piston, 11-nut, 12-magnetic flow liquid, 13-O grommet type seal, 14-floating piston, 15-air cavity, 16-lower lift ring, 17-.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment
nullAs shown in Figure 1，The present embodiment includes the piston rod 5 that the airtight working cylinder 4 in two ends and end cap 2 and its end through working cylinder 4 are placed in working cylinder 4，The piston 10 having longitudinal section to be T-shape is connected in described piston rod 5 end thread，The vertical portion end of piston 10 is hinged with two semicircular baffle plates 18，And in piston 10 upper end, packing ring 6 is installed，In piston 10 lower end, the nut 11 for fixed piston 10 and baffle plate 18 is installed，The horizontal part of piston 10 has discharge orifice 7 on multiple，Two baffle plates 18 have the lower discharge orifice 17 that multiple and upper discharge orifice 7 is corresponding，The aperture of described upper discharge orifice 7 is incremented by two ends by middle part，The middle part of piston 10 is provided with coil 9，Coil 9 outer wall is provided with cage ring 8，The inner hollow of piston rod 5，The connection wire of coil 9 is connected through the inside of piston rod 5 with extraneous power supply；Also including floating piston 14, described floating piston 14 is separated into liquid chambers and air cavity 15 by internal for working cylinder 4, is filled with magnetic flow liquid 12, is filled with the nitrogen of compression in air cavity 15 in liquid chambers；Also including upper lift ring 1 and lower lift ring 16, and upper lift ring 1 is fixed on piston rod 5 upper end, lower lift ring 16 is fixed on the bottom of working cylinder 4；Also including sealing ring 3 and O grommet type seal 13, described sealing ring 3 is arranged on the axial seal on the inwall of end cap 2 for piston rod 5, and described O grommet type seal 13 is arranged on floating piston 14 isolation for air cavity 15 with liquid chambers；Described piston rod 5 and piston 10 threaded engagement, and in piston 10 upper end, packing ring 6 is installed, in piston 10 lower end, nut 11 is installed.
nullWhen the present invention works，By upper lift ring 1 and lower lift ring 16，Shock-damping structure is rapidly secured on drilling tool and motive power outputting apparatus，And the dismounting facilitating shock-damping structure is overhauled，Reduce the working strength of workman，Reduce the consumption of non-working time，When drilling tool works，Coil 9 is connected with external power source by wire，By the regulation of electric current，Coil 9 produces changes of magnetic field at liquid chamber，Have an effect with the magnetic flow liquid 12 in liquid chambers in the magnetic field of change，And then change by the viscosity of the magnetic flow liquid 12 in the upper discharge orifice 7 of piston about 10 two ends entrance，And then change the size of damping force，Reach the purpose of drilling tool damping，And owing to the stroke of piston rod 5 is less，The bottom of working cylinder 4 floating piston 14 is installed and by working cylinder 4 inside be separated into two parts，I.e. liquid chambers and air cavity 15，The compressed nitrogen with certain initial pressure it is filled with in air cavity 15，Can the change in volume of effective replenisher body cavity，Make it have good damping characteristic to adapt to its fast drilling of oil well in complicated geological stratification，Reach to protect the purpose of drilling tool；
Wherein, the aperture of described upper discharge orifice 7 is incremented by two ends by middle part, existing damping device then changes flow area by the openings of sizes of regulation throttle orifice, damping adjusting coefficient is carried out with this, the damping force of output changes with the stroke of amortisseur upper piston 10, but must realize by reducing the stroke of restriction and increase piston 10 when tackling bigger impact, result makes the drilling tool quality when creeping into increase；nullWhen the present invention works，Magnetic flow liquid 12 flows through the two ends up and down of piston 10 by upper discharge orifice 7，I.e. realize the magnetic flow liquid 12 circulation in liquid chambers，Under extraneous power supply regulation and control，Coil 9 is made to produce changes of magnetic field in liquid chambers，And changes of magnetic field causes the viscosity of magnetic flow liquid 12，And the aperture of upper discharge orifice 7 is incremented by two ends by middle part，I.e. realize the middle reducing of upper discharge orifice 7，The grasp of piston 10 is increased at the upper and lower two ends of reducing by magnetic flow liquid 12，Lower discharge orifice 17 is then common through hole，Make piston 10 smooth outflow in magnetic flow liquid，Reduce the piston 10 movement in liquid chambers and pause and transition in rhythm or melody sense occurs，Ensure piston 10 quick stop motion in liquid chambers，Simultaneously by the rapid conversion of external voltage，Realize the piston 10 start and stop campaign in working cylinder 4，And then realize the shock-absorbing function of drilling tool，The choke valve variable owing to not installing orifice size，And then substantially increase the mechanical wear resistance energy of device，Extend the service life of the present invention；nullThe piston 10 bottom chain connection that the present invention is "T"-shaped in longitudinal section has two baffle plates 18，Coil 9 and cage ring 8 are then set on the vertical portion of piston 10，Threaded engagement by nut 11 with piston rod 5 end，Coil 9 and cage ring 8 are fixed by two baffle plates 18，And on baffle plate 18, have the lower discharge orifice 17 corresponding with upper discharge orifice 7，During piston 10 moves down with piston rod 5 magnetic flow liquid by the discharge orifice 7 gap between the vertical portion and working cylinder 4 inwall of piston 10 flow under in discharge orifice 17，Under the control of external voltage，Changes of magnetic field is produced after coil 9 is charged，To increase or to reduce the piston 10 damping force in liquid chambers，When the useful life of coil 9 expires or is impaired，Can directly open end cap 2 to be taken out by piston 10，Make baffle plate 18 parallel with the vertical portion of piston 10 by rotating nut 11，Quickly coil 9 can be taken out replacing，And then avoid piston integral replacing directly，Greatly reduce the use cost of this device.
Further, for preventing the leakage of magnetic flow liquid 12, the part contacted with working cylinder 4 when piston 10 axially-movable is provided with sealing gasket, avoid causing because magnetic flow liquid 12 runs off the viscosity in liquid chambers to be not enough to support piston 10, the O grommet type seal 13 installed on floating piston 14 can prevent magnetic flow liquid 12 to be snapped down to air cavity 15 by liquid chambers, improves the compressed nitrogen support degree to floating piston 14 in air cavity 15.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (1)
- null1. a rig creeps into buffer unit，The piston rod (5) that the working cylinder (4) airtight including two ends and end cap (2) and its end through working cylinder (4) are placed in working cylinder (4)，It is characterized in that: connect the piston (10) having longitudinal section to be T-shape in described piston rod (5) end thread，The vertical portion end of piston (10) is hinged with two semicircular baffle plates (18)，And in piston (10) upper end, packing ring (6) is installed，Nut (11) for fixed piston (10) and baffle plate (18) is installed in piston (10) lower end，The horizontal part of piston (10) has multiple upper discharge orifice (7)，Two baffle plates (18) have the lower discharge orifice (17) that multiple and upper discharge orifice (7) is corresponding，The aperture of described upper discharge orifice (7) is incremented by two ends by middle part，The middle part of piston (10) is provided with coil (9)，Coil (9) outer wall is provided with cage ring (8)，The inner hollow of piston rod (5)，The connection wire of coil (9) is connected through the inside of piston rod (5) with extraneous power supply；Also including floating piston (14), described floating piston (14) is separated into liquid chambers and air cavity (15) by internal for working cylinder (4), is filled with magnetic flow liquid (12), is filled with the nitrogen of compression in air cavity (15) in liquid chambers；Also including upper lift ring (1) and lower lift ring (16), and upper lift ring (1) is fixed on piston rod (5) upper end, lower lift ring (16) is fixed on the bottom of working cylinder (4)；Also include sealing ring (3) and O grommet type seal (13), described sealing ring (3) is arranged on the inwall of end cap (2) axial seal for piston rod (5), and described O grommet type seal (13) is arranged on the upper isolation for air cavity (15) with liquid chambers of floating piston (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060080.4A CN104632978B (en) | 2015-02-05 | 2015-02-05 | Drilling machine drilling buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510060080.4A CN104632978B (en) | 2015-02-05 | 2015-02-05 | Drilling machine drilling buffering device |
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| Publication Number | Publication Date |
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| CN104632978A CN104632978A (en) | 2015-05-20 |
| CN104632978B true CN104632978B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510060080.4A Active CN104632978B (en) | 2015-02-05 | 2015-02-05 | Drilling machine drilling buffering device |
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| CN (1) | CN104632978B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015224811A1 (en) * | 2015-12-10 | 2017-06-14 | Zf Friedrichshafen Ag | Vibration damper for a motor vehicle |
| CN111749627B (en) * | 2020-07-06 | 2021-12-14 | 云南铜业矿产资源勘查开发有限公司 | Drilling rod vibration damper for exploration |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220517A (en) * | 1962-10-30 | 1965-11-30 | Best available copy | |
| GB1369895A (en) * | 1972-02-02 | 1974-10-09 | Vetco Offshore Ind Inc | Apparatus for maintaining a predetermined stress in a running strin for wells |
| US4449854A (en) * | 1981-02-12 | 1984-05-22 | Nl Industries, Inc. | Motion compensator system |
| US6386343B1 (en) * | 2001-04-30 | 2002-05-14 | Delphi Technologies, Inc. | Temperature compensating flux ring |
| US6637556B1 (en) * | 2002-08-05 | 2003-10-28 | Delphi Technologies, Inc. | Magneto-rheological damper with grooved fluid passages |
| CN203926577U (en) * | 2014-06-27 | 2014-11-05 | 四川工程职业技术学院 | Magnetorheological fluid shock absorber |
| CN204113993U (en) * | 2014-08-29 | 2015-01-21 | 万向钱潮股份有限公司 | The magnetorheological front vibration damper of a kind of double-deck single cylinder gas compensation formula |
| CN204572897U (en) * | 2015-02-05 | 2015-08-19 | 成都北方石油勘探开发技术有限公司 | A kind of vibration damper for oil well drilling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010015647A1 (en) * | 2008-08-06 | 2010-02-11 | Basf Se | Magnetorheological valve |
-
2015
- 2015-02-05 CN CN201510060080.4A patent/CN104632978B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3220517A (en) * | 1962-10-30 | 1965-11-30 | Best available copy | |
| GB1369895A (en) * | 1972-02-02 | 1974-10-09 | Vetco Offshore Ind Inc | Apparatus for maintaining a predetermined stress in a running strin for wells |
| US4449854A (en) * | 1981-02-12 | 1984-05-22 | Nl Industries, Inc. | Motion compensator system |
| US6386343B1 (en) * | 2001-04-30 | 2002-05-14 | Delphi Technologies, Inc. | Temperature compensating flux ring |
| US6637556B1 (en) * | 2002-08-05 | 2003-10-28 | Delphi Technologies, Inc. | Magneto-rheological damper with grooved fluid passages |
| CN203926577U (en) * | 2014-06-27 | 2014-11-05 | 四川工程职业技术学院 | Magnetorheological fluid shock absorber |
| CN204113993U (en) * | 2014-08-29 | 2015-01-21 | 万向钱潮股份有限公司 | The magnetorheological front vibration damper of a kind of double-deck single cylinder gas compensation formula |
| CN204572897U (en) * | 2015-02-05 | 2015-08-19 | 成都北方石油勘探开发技术有限公司 | A kind of vibration damper for oil well drilling |
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| Publication number | Publication date |
|---|---|
| CN104632978A (en) | 2015-05-20 |
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