CN203403820U - Waterpower oscillator valve plate structure - Google Patents

Waterpower oscillator valve plate structure Download PDF

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Publication number
CN203403820U
CN203403820U CN201320435878.9U CN201320435878U CN203403820U CN 203403820 U CN203403820 U CN 203403820U CN 201320435878 U CN201320435878 U CN 201320435878U CN 203403820 U CN203403820 U CN 203403820U
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CN
China
Prior art keywords
valve
valve plate
rotor
hydroscillator
drive shaft
Prior art date
Application number
CN201320435878.9U
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Chinese (zh)
Inventor
祝兆清
常青忠
王端痒
Original Assignee
扬州天业石油机械有限公司
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Application filed by 扬州天业石油机械有限公司 filed Critical 扬州天业石油机械有限公司
Priority to CN201320435878.9U priority Critical patent/CN203403820U/en
Application granted granted Critical
Publication of CN203403820U publication Critical patent/CN203403820U/en

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Abstract

The utility model relates to the technical field of oil exploitation, in particular to a waterpower oscillator valve plate structure which applies pressure on a drill bit conveniently, improves well drilling efficiency and prevents drilling tools from sticking and blocking. The waterpower oscillator valve plate structure comprises a waterpower oscillator, the upper end of the waterpower oscillator is connected with a drill rod, and the waterpower oscillator comprises an upper connector, a stator, an outer shell and a lower connector in tight fitting in sequence. A rotor is arranged in the stator in a sleeved mode, the lower end of the rotor is connected with the valve plate structure, and the valve plate structure comprises a valve body, a movable valve plate and a fixed valve plate. The upper end of the valve body is in synchronous connection with the rotor through a transmission assembly, an annular space convenient for liquid to pass through is formed between the stator and the rotor, the valve body is provided with a valve cavity communicated with the annular space, and the movable valve plate is embedded inside the lower side of the valve cavity in a sealing mode and rotates synchronously with the valve body. The fixed valve plate is fixedly mounted at the upper end of the lower connector in an embedded mode, the movable valve plate and the opposite face of the fixed valve plate are tightly matched and connected, and the movable valve plate and the fixed valve plate are respectively provided with a sector channel which is larger than a semicircle respectively.

Description

A kind of hydroscillator valve board structure

Technical field

The present invention relates to technical field of petroleum extraction, particularly a kind of drill bit the pressure of the drill that effectively increases in the complex structural wells such as high angle hole, horizontal well are exploited is to improve the hydroscillator valve board structure of drilling speed and production efficiency.

Background technology

Along with the quantity increase of the complex structural wells such as China each elephant exploitation high angle hole, horizontal well and horizontal branch well, how effectively to drill bit, to apply the pressure of the drill becomes people's question of common concern.Drilling well at present is mainly crept into two kinds by compound drilling and the slip of well dynamic instrument and is crept into mode.Because these labyrinths increase along journey hydraulic loss, shaft bottom drill bit available water horsepower is quite low, is all generally to drill bit, to apply the pressure of the drill fractured rock by drill string own wt.Yet in the wellbore construction of high angle hole, extended reach well and horizontal well, these traditional pressuring methods are subject to certain restrictions, and the subject matter of its existence is:

1,, because hole deviation is larger, drill string own wt is little or be approximately zero at the component of well direction, is difficult to meet the pressure of the drill of design in advance;

2, in horizontal well, because drill string own wt is large to the normal pressure of the borehole wall, increase the frictional resistance of drilling tool on the borehole wall, thereby restricted on drill bit, applied effective the pressure of the drill;

3,, for horizontal well, because the horizontal segment of construction is more and more longer, yet in the large well section work progress of hole deviation, tend to occur the phenomenons such as backing pressure, sticky card;

4, for compound drilling, especially in well dynamic instrument slip drilling process, cannot guarantee to drill bit apply truly, effective the pressure of the drill, have a strong impact on full well average rate of penetration and drilling period.

Summary of the invention

The present invention is directed to the problems referred to above that prior art exists, provide a kind of being convenient to effectively to exert pressure, improve drilling efficiency to drill bit, and effectively prevent the hydroscillator valve board structure of bouncing of drilling tool in drilling process, backing pressure and sticky card, so that improve the drilling efficiency of high angle hole and horizontal well.

The object of the present invention is achieved like this, a kind of hydroscillator valve board structure, comprise hydroscillator, described hydroscillator upper end is connected with drilling rod, hydroscillator comprises the top connection being tightly connected successively, stator, shell and lower contact, in described stator, be arranged with rotor, described rotor lower end is connected with valve board structure, described valve board structure comprises valve body, move valve plate and determine valve plate, described valve body upper end is connected with rotor synchronous by drive disk assembly, between described stator and rotor, be provided with and be convenient to the annular space that liquid stream passes through, described valve body is provided with the valve pocket being communicated with annular space, described moving valve plate sealing is inlaid in valve pocket lower inner part and synchronizes and rotate with valve body, describedly determine valve plate and be fixedly inlaid in lower contact upper end, described moving valve plate is adjacent to and is connected with the opposite face of determining valve plate, described moving valve plate with determine on valve plate, to be respectively equipped with the sector channel that is greater than semicircle.

Hydroscillator valve board structure of the present invention, in use, top is connected with drilling rod by top connection, bottom is connected with drill string and drill bit by lower contact, in work, high pressure liquid drives rotor in drilling rod, and hydraulic fluid can be converted to mechanical energy, rotor synchronously rotates by drive disk assembly band moving valve and moving valve plate, move valve plate edge simultaneously and determine in the face that the is adjacent to rotation process of valve plate, both overlapped connections of sector channel, its overlapping area is from greatly to little, cyclically-varying from small to large again, make the also cyclically-varying of circulation area of high pressure liquid stream, the flow stream pressure on valve body top is periodically changed, the vibration of generation waterpower pulse, thereby realize the pulse pressurization to downhole drill bit, for downhole drill bit provides authentic and valid pressurization, to improve drilling efficiency.The drilling rod that hydroscillator valve board structure of the present invention top connects extends to well head and fixes by rotating disk, and the roofbolt end that bottom connects connects drill bit.The cross section overlaps when moving valve plate and the sector channel of determine valve plate are maximum, overflow section being the sector channel that overlaps completely, the liquid out-of-date pressure drop of circulating is minimum, and the flow direction of fluid is to be partial to sector open folk prescription simultaneously to mobile; Because fluid folk prescription is to when motion, moving valve plate with determine a radial component of valve plate place generation, now, whole drilling tool, hydroscillator and drill string are equivalent to a simply supported beam, rotating disk and drill bit are the fulcrum at simply supported beam two, simply supported beam produces hydraulic oscillation with determine the valve plate fluid course circulation area cycle under changing at the moving valve plate of valve board structure, and generation radially bends distortion under the effect of radial component; When moving valve plate overlaps with the sector channel of determining valve plate is minimum, when overflow section amasss the dumb-bell shape that is symmetrical, pressure drop is maximum, the flow direction of fluid is to flow along dumbbell opening direction is symmetrical, now, radial component disappearance drilling tool, hydroscillator and drill string, under the effect of elastic restoring force, restore to the original state; This periodic variation can prevent that whole drilling tool and drill string from sticky card phenomenon occurring, and the landwaste deposited phenomenon in the time of simultaneously also can preventing Transport of Drilling Cutting In A occurs.

For guaranteeing moving valve plate and determining valve plate and be adjacent to closely cooperating of face, described moving valve plate is smooth minute surface with the face of being adjacent to that coordinates of determining valve plate.

For improving moving valve plate and the anti-wear performance of determining valve plate, described moving valve plate is YG8 carbide alloy with the material of determining valve plate.

For guaranteeing the intensity of waterpower pulse vibration, the actual internal area of described rotor and stator annular space is S, and the sectional area of described sector channel is also S.

For ease of realizing being in transmission connection of rotor and valve body, described rotor eccentricity is arranged in stator, described drive disk assembly comprises universal drive shaft top connection, universal drive shaft and the universal drive shaft drive link connecting successively in end housing under rotor, described universal drive shaft drive link lower end periphery is connected by plain bearing element slipper seal with shell, described shell lower end inwall is connected with lower contact thread seal, and described universal drive shaft drive link lower end is connected by spline drived with valve body.

For ease of realizing the eccentric compound motion of rotor, guarantee the transmission of hydraulic torque, the peripheral, axial of described rotor twist, it is petal that radial section is, the waveform being axially centrosymmetric of described stator inner wall, it is identical with rotor lobe shape petal that radial section is, described rotor relative stator eccentric setting and when rotor rotation and when stator center revolves round the sun and the waveform inwall of stator non-interference, described rotor lower end is connected with universal drive shaft top connection upper end thread seal.

For ease of realizing the multiple heart motion of bias on top, change the concentric motion of bottom into, described plain bearing element comprise with the slip blind axle of the fixing suit of outer casing inner wall and be fixedly set in universal drive shaft drive link lower, outer perimeter and with the slip dynamic bearing of slip blind axle sliding connection, described slip blind axle inwall is fixed with the wear-resistant sleeve coordinating with the dynamic bearing that slides, and described slip blind axle and shell are connected and between face, are provided with sealing ring.

For ease of being in transmission connection of universal drive shaft, between described universal drive shaft and universal drive shaft top connection and universal drive shaft drive link, by universal joint, be connected respectively.

For ease of moment of torsion transmission, described valve body upper end extends upwardly in universal drive shaft drive link and by the guiding wear ring the being equipped with connection that reciprocatingly slides, described valve body lower portion periphery is connected by the spline drived being equipped with universal drive shaft drive link bottom.

Therefore hydroscillator valve board structure of the present invention has following beneficial effect:

1, by the valve board structure of hydroscillator, by hydraulic energy transfer, it is mechanical energy, and changed in the cycle of fluid course sectional area, produce waterpower pulse, and in pressure process, make drilling tool and drill string produce reciprocating elastic displacement, thereby avoid high angle hole, horizontal well the pressure of the drill to be subject to the impact of partical gravity, buoyancy and frictional resistance to obtain true, stable the pressure of the drill.

2, in fluid course cycle change procedure, drilling tool and drill bit are realized to waterpower pulse pressurization, and make drilling tool and drill string in moving valve plate and the junction of determining valve plate, produce the distortion that radially bends in cycle, prevent that drilling tool and drill string from sticky card phenomenon occurring.

3, in waterpower pulse oscillatory process, can effectively alleviate the horizontal and vertical vibration that drilling tool produces, thereby reduce the fatigue failure of drilling tool, extend the application life of drilling tool and drill bit.

4, in waterpower pulse oscillatory process, can reduce drilling tool and drill string frictional resistance, prevent backing pressure.

5, in waterpower pulse oscillatory process, can prevent bouncing of drilling tool, improve rate of penetration.

Accompanying drawing explanation

Fig. 1 is the hydroscillator structure chart of being furnished with hydroscillator valve board structure of the present invention.

Fig. 2 is the partial enlarged drawing of I section in Fig. 1.

Fig. 3 be valve board structure in moving valve plate and the sector channel overlapping area of determining valve plate schematic diagram hour.

Fig. 4 is that A-A in Fig. 3 is to sectional drawing.

Fig. 5 be valve board structure in moving valve plate with determine valve plate sector channel overlapping area maximum time schematic diagram.

Fig. 6 is that B-B in Fig. 5 is to sectional drawing.

Fig. 7 is the structure chart of moving valve plate and moving valve plate.

Fig. 8 is the C-C sectional drawing in Fig. 1.

Fig. 9 is the simply supported beam schematic diagram of moving valve plate whole drilling tool, hydroscillator and drill string composition when determine valve plate sector channel overlapping area maximum.

Figure 10 is the partial enlarged drawing at II place in Fig. 9.

Figure 11 for moving valve plate with determine the simply supported beam schematic diagram of hour whole drilling tool, hydroscillator and drill string composition of valve plate sector channel overlapping area.

Figure 12 is the partial enlarged drawing at III place in Figure 11.

Wherein, 1 top connection; 2 stators; 3 rotors; 4 universal drive shaft top connections; 5 shells; 6 universal drive shafts; 7 universal drive shaft drive links; 8 slip blind axles; 8a wear-resistant sleeve; 9 slip dynamic bearings; 10 valve bodies; 11 moving valve plates; 12 determine valve plate; 13 lower contacts; 14 sealing rings; 15 guiding wear rings; 16 drilling rods; 17 rotating disks; 18 drill strings; 19 drill bits.

The specific embodiment

If Fig. 1-Figure 12 is hydroscillator valve board structure of the present invention, comprise hydroscillator, hydroscillator upper end is connected with drilling rod, hydroscillator comprises the top connection 1 being tightly connected successively, stator 2, shell 5 and lower contact 13, in stator 2, be arranged with rotor 3, rotor 3 lower ends are connected with valve board structure, valve board structure comprises valve body 10, move valve plate 11 and determine valve plate 12, connection is synchronizeed in valve body 10 upper ends with rotor 3 by drive disk assembly, between stator 2 and rotor 3, be provided with and be convenient to the annular space that liquid stream passes through, valve body 10 is provided with the valve pocket being communicated with annular space, moving valve plate 11 sealings are inlaid in valve pocket lower inner part and synchronize rotation with valve body 10, determine valve plate 12 and be fixedly inlaid in lower contact 13 upper ends, moving valve plate 11 is adjacent to and is connected with the opposite face of determining valve plate 12, and moving valve plate is smooth minute surface with the face of being adjacent to that coordinates of determining valve plate, moving valve plate 11 with determine on valve plate 12, to be respectively equipped with the sector channel that is greater than semicircle, for improving moving valve plate 11 and the anti-wear performance of determining valve plate 12, moving valve plate 11 is YG8 carbide alloy with the material of determining valve plate 12, rotor 3 is S with the actual internal area of stator 2 annular spaces, and the sectional area of sector channel is also S.

For ease of realizing being in transmission connection of rotor 3 and valve body, rotor 3 eccentric settings are in stator 2, drive disk assembly comprises 5 universal drive shaft top connection 4, universal drive shaft 6 and the universal drive shaft drive links 7 that connect successively in 3 times end housings of rotor, universal drive shaft drive link 7 lower end peripheries are connected by plain bearing element slipper seal with shell 5, shell 5 lower end inwalls are connected with lower contact 13 thread seals, and universal drive shaft drive link 7 lower ends are connected by spline drived with valve body 10; The peripheral, axial of rotor 3 twist, as shown in Figure 8, it is petal that radial section is, the waveform being axially centrosymmetric of stator 2 inwalls, it is identical with rotor 3 lobe shapes petal that radial section is, rotor 3 relative stator 2 eccentric settings and when rotor 3 rotations and non-interference around the waveform inwall of 2 centers whens revolution of stator and stator 2, rotor 3 lower ends are connected with universal drive shaft top connection 4 upper end thread seals; For ease of realizing the multiple heart motion of bias on top, change the concentric motion of bottom into, as shown in Figure 2, plain bearing element comprise with the slip blind axle 8 of the fixing suit of shell 5 inwalls and be fixedly set in universal drive shaft drive link 7 lower, outer perimeter and with the slip dynamic bearing 9 of slip blind axle 8 sliding connections, slip blind axle 8 inwalls are fixed with the wear-resistant sleeve coordinating with the dynamic bearing 9 that slides, and slip blind axle 8 and shell 8 are connected and between face, are provided with sealing ring 14; For ease of being in transmission connection of universal drive shaft 6, universal drive shaft 6 is connected by universal joint respectively with 6 of universal drive shaft top connection 4 and universal drive shaft drive links; For ease of moment of torsion transmission, valve body 10 upper ends extend upwardly in universal drive shaft drive link 7 and by the guiding wear ring 10a the being equipped with connection that reciprocatingly slides, valve body 10 lower, outer perimeter are connected by the spline drived being equipped with universal drive shaft drive link 7 bottoms.

Hydroscillator valve board structure of the present invention, in use, as shown in Fig. 9-Figure 12, top is connected with drilling rod 16 by top connection 1, well head is provided with for the fixing rotating disk 17 of drilling rod 16, bottom is connected with drill string 1820 and drill bit 19 by lower contact 13, in work, highly pressurised liquid in drilling rod 16 can be converted to mechanical energy around stator center revolution by hydraulic fluid in rotation under the driving effect of screw hydraulic, rotor 3 drives universal drive shaft top connection 4 successively, universal drive shaft 6 and universal drive shaft drive link 6 rotate, and by plain bearing element, the eccentric compound motion on top is changed to concentric motion, universal drive shaft drive link 7 band moving valves 10 and moving valve plate 11 rotate, move valve plate 11 edges and determine in the face that the is adjacent to rotation process of valve plate 12, both overlapped connections of sector channel, its overlapping area is from greatly to little, cyclically-varying from small to large again, make the also cyclically-varying of circulation area of high pressure liquid stream, the flow stream pressure on valve body 10 tops is periodically changed, the vibration of generation waterpower pulse, thereby realize, downhole drill bit is realized to pulse pressurization, for downhole drill bit provides authentic and valid pressurization, and can prevent from occurring in drilling process backing pressure, bouncing of drilling tool phenomenon, improve drilling speed and drilling efficiency, extend the application life of drilling tool.When moving valve plate 11 with determine that valve plate 12 sector channels maximumly overlap, the sector channel of overflow section for overlapping completely, the liquid out-of-date pressure drop of circulating is minimum, the flow direction of fluid is to be partial to sector open folk prescription simultaneously to mobile; Because fluid folk prescription is to when motion, moving valve plate 11 with determine a radial component of valve plate 12 places' generations, now, whole drilling rod 17, hydroscillator and drill string 18 are equivalent to a simply supported beam, rotating disk 16, drill bit 19 are the fulcrum at simply supported beam two, simply supported beam produces hydraulic oscillation with determine the 12 fluid course circulation area cycles of valve plate under changing at the moving valve plate 11 of valve board structure, and generation radially bends distortion under the effect of radial component; When moving valve plate 11 overlaps with the sector channel of determining valve plate 12 is minimum, when overflow section amasss into symmetrical dumb-bell shape, pressure drop is maximum, the flow direction of fluid is to flow along dumbbell opening direction is symmetrical, now, radial component disappearance drilling tool, hydroscillator and drilling rod, under the effect of elastic restoring force, restore to the original state; This periodic variation can prevent that whole drilling rod 17 and drill string 18 from sticky card phenomenon occurring, and the landwaste deposited phenomenon in the time of simultaneously also can preventing Transport of Drilling Cutting In A occurs.

The present invention is not limited to above-described embodiment; every on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the scope of protection of the invention.

Claims (9)

1. a hydroscillator valve board structure, comprise hydroscillator, described hydroscillator upper end is connected with drilling rod, hydroscillator comprises the top connection being tightly connected successively, stator, shell and lower contact, in described stator, be arranged with rotor, it is characterized in that, described rotor lower end is connected with valve board structure, described valve board structure comprises valve body, move valve plate and determine valve plate, described valve body upper end is connected with rotor synchronous by drive disk assembly, between described stator and rotor, be provided with and be convenient to the annular space that liquid stream passes through, described valve body is provided with the valve pocket being communicated with annular space, described moving valve plate sealing is inlaid in valve pocket lower inner part and synchronizes and rotate with valve body, describedly determine valve plate and be fixedly inlaid in lower contact upper end, described moving valve plate is adjacent to and is connected with the opposite face of determining valve plate, described moving valve plate with determine on valve plate, to be respectively equipped with the sector channel that is greater than semicircle.
2. hydroscillator valve board structure according to claim 1, is characterized in that, described moving valve plate is smooth minute surface with the face of being adjacent to that coordinates of determining valve plate.
3. hydroscillator valve board structure according to claim 1, is characterized in that, described moving valve plate is YG8 carbide alloy with the material of determining valve plate.
4. hydroscillator valve board structure according to claim 1, is characterized in that, the actual internal area of described rotor and stator annular space is S, and the sectional area of described sector channel is also S.
5. hydroscillator valve board structure according to claim 1, it is characterized in that, described rotor eccentricity is arranged in stator, described drive disk assembly comprises universal drive shaft top connection, universal drive shaft and the universal drive shaft drive link connecting successively in end housing under rotor, described universal drive shaft drive link lower end periphery is connected by plain bearing element slipper seal with shell, described shell lower end inwall is connected with lower contact thread seal, and described universal drive shaft drive link lower end is connected by spline drived with valve body.
6. hydroscillator valve board structure according to claim 5, it is characterized in that, the peripheral, axial of described rotor twist, it is petal that radial section is, the waveform being axially centrosymmetric of described stator inner wall, it is identical with rotor lobe shape petal that radial section is, described rotor relative stator eccentric setting and when rotor rotation and when stator center revolves round the sun and the waveform inwall of stator non-interference, described rotor lower end is connected with universal drive shaft top connection upper end thread seal.
7. according to the hydroscillator valve board structure described in claim 5 or 6, it is characterized in that, described plain bearing element comprise with the slip blind axle of the fixing suit of outer casing inner wall and be fixedly set in universal drive shaft drive link lower, outer perimeter and with the slip dynamic bearing of slip blind axle sliding connection, described slip blind axle inwall is fixed with the wear-resistant sleeve coordinating with the dynamic bearing that slides, and described slip blind axle and shell are connected and between face, are provided with sealing ring.
8. according to the hydroscillator valve board structure described in claim 5 or 6, it is characterized in that, between described universal drive shaft and universal drive shaft top connection and universal drive shaft drive link, by universal joint, be connected respectively.
9. according to the hydroscillator valve board structure described in claim 5 or 6, it is characterized in that, described valve body upper end extends upwardly in universal drive shaft drive link and by the guiding wear ring the being equipped with connection that reciprocatingly slides, described valve body lower portion periphery is connected by the spline drived being equipped with universal drive shaft drive link bottom.
CN201320435878.9U 2013-07-22 2013-07-22 Waterpower oscillator valve plate structure CN203403820U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104405288A (en) * 2014-10-24 2015-03-11 缪宏 Hydraulic simple harmonic oscillator for well drilling
CN104989307A (en) * 2015-07-17 2015-10-21 东北石油大学 Hydraulic oscillation circumferential impactor
CN105937378A (en) * 2016-06-21 2016-09-14 中国石油天然气集团公司 Downhole screw motor two-way vibration cementing tool and method
CN106014316A (en) * 2016-05-26 2016-10-12 中国石油集团渤海钻探工程有限公司 Shock-resisting downhole screw type pulse generator
CN106574482A (en) * 2014-07-24 2017-04-19 高级技术有限责任公司 Fluid pulse valve
WO2018026849A1 (en) * 2016-08-02 2018-02-08 National Oilwell Varco, L.P. Drilling tool with non-synchronous oscillators and method of using same
CN109707313A (en) * 2019-01-08 2019-05-03 西南石油大学 Vane type multiple-pulse hydroscillator
CN111119740A (en) * 2019-11-14 2020-05-08 中石化石油工程技术服务有限公司 Hydraulic oscillator induction assembly
WO2020222890A1 (en) * 2019-05-02 2020-11-05 Rival Downhole Tools Lc Wear resistant vibration assembly and method

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106574482B (en) * 2014-07-24 2019-08-27 高级技术有限责任公司 Fluid pulse valve
CN106574482A (en) * 2014-07-24 2017-04-19 高级技术有限责任公司 Fluid pulse valve
CN104405288A (en) * 2014-10-24 2015-03-11 缪宏 Hydraulic simple harmonic oscillator for well drilling
CN104989307A (en) * 2015-07-17 2015-10-21 东北石油大学 Hydraulic oscillation circumferential impactor
CN106014316A (en) * 2016-05-26 2016-10-12 中国石油集团渤海钻探工程有限公司 Shock-resisting downhole screw type pulse generator
CN106014316B (en) * 2016-05-26 2019-09-13 中国石油集团渤海钻探工程有限公司 Shock resistance underground screw impulse generator
CN105937378A (en) * 2016-06-21 2016-09-14 中国石油天然气集团公司 Downhole screw motor two-way vibration cementing tool and method
CN105937378B (en) * 2016-06-21 2019-12-10 中国石油天然气集团有限公司 Downhole screw motor bidirectional vibration cementing tool and method
US10358872B2 (en) 2016-08-02 2019-07-23 National Oilwell DHT, L.P. Drilling tool with non-synchronous oscillators and method of using same
CN109790743A (en) * 2016-08-02 2019-05-21 国民油井Dht有限公司 Drilling tool and its application method with nonsynchronous vibrator
CN109790743B (en) * 2016-08-02 2020-05-12 国民油井Dht有限公司 Drilling tool with asynchronous oscillator and method of use thereof
WO2018026849A1 (en) * 2016-08-02 2018-02-08 National Oilwell Varco, L.P. Drilling tool with non-synchronous oscillators and method of using same
CN109707313A (en) * 2019-01-08 2019-05-03 西南石油大学 Vane type multiple-pulse hydroscillator
WO2020222890A1 (en) * 2019-05-02 2020-11-05 Rival Downhole Tools Lc Wear resistant vibration assembly and method
US10829993B1 (en) 2019-05-02 2020-11-10 Rival Downhole Tools Lc Wear resistant vibration assembly and method
CN111119740A (en) * 2019-11-14 2020-05-08 中石化石油工程技术服务有限公司 Hydraulic oscillator induction assembly

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EE01 Entry into force of recordation of patent licensing contract

Assignee: Yangzhou Kai Lin Yinyan Combustion Equipment Co Ltd

Assignor: Yangzhou Tianye Petroleum Machinery Co., Ltd.

Contract record no.: 2016320000116

Denomination of utility model: A kind of hydroscillator valve board structure

Granted publication date: 20140122

License type: Exclusive License

Record date: 20160321

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
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