CN108442883B - Underground hydraulic oscillator - Google Patents
Underground hydraulic oscillator Download PDFInfo
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- CN108442883B CN108442883B CN201810504863.0A CN201810504863A CN108442883B CN 108442883 B CN108442883 B CN 108442883B CN 201810504863 A CN201810504863 A CN 201810504863A CN 108442883 B CN108442883 B CN 108442883B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to an underground hydraulic oscillator, and belongs to the technical field of underground petroleum equipment. The vibrating nipple consists of a vibrating nipple and an oscillating nipple, wherein the vibrating nipple consists of a mandrel, an upper connector, a lower connector, an outer tube, an intermediate connector and a piston, the lower connector is arranged at one end of the outer tube, the upper connector is arranged at the other end of the outer tube in a threaded manner, the mandrel is arranged in the outer tube, one end of the mandrel extends to the outer end of the upper connector, and a disc spring is arranged on the mandrel in the outer tube through a spacer bush and a push plate. The underground hydraulic oscillator is simple in structure, convenient to install, small in radial size, good in horizontal drilling stability, capable of effectively preventing the problem of pressure supporting, reducing energy loss caused by friction, reducing friction resistance, and therefore improving the efficiency of horizontal well operation. Is especially suitable for long horizontal well, high inclination, multi-branch horizontal well and other operations.
Description
Technical Field
The invention relates to an underground hydraulic oscillator, and belongs to the technical field of underground petroleum equipment.
Background
In recent years, with the continuous deep exploration technology of various large oil fields, the problems of gradually increasing the structural complexity of oil well bodies, increasing the number of long horizontal wells, large inclination, multi-branch horizontal wells and the like, have put forward new practical requirements on drilling engineering, so that the development space and the requirements of tools such as hydraulic oscillators and the like are improved. How to increase the length of the horizontal section of the horizontal well and realize quick drilling is a focus of research related to the petroleum industry. The complex well structure not only puts higher requirements on the drilling technology and method, but also leads the friction resistance between the petroleum drill string and the well wall to be obviously increased by a larger well inclination angle, reduces the transmission efficiency of the weight on bit and influences the mechanical drilling speed. A great deal of research work is being carried out by students at home and abroad on how to improve the length of the horizontal section in the horizontal well and realize the problems of rapid drilling and the like. The underground power drilling tool such as a hydraulic oscillator has the advantages of improving the mechanical drilling speed, increasing the footage of a single drill bit, being convenient for directionally controlling the track of a borehole, converting static friction between a drill stem and a borehole wall into sliding friction when sliding drill feeding so as to reduce friction resistance and the like, so that the development space and the demand of the underground power drilling tool are greatly improved, and the underground power drilling tool is highly focused by vast scientific researchers.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the downhole hydraulic oscillator which can effectively reduce the friction resistance between a drill string and a well wall, avoid the occurrence of drill sticking accidents and further improve the drilling efficiency.
The technical scheme of the invention is as follows:
the utility model provides a hydraulic oscillator in pit, it comprises vibration nipple joint and vibration nipple joint, mutual threaded connection, its characterized in that between vibration nipple joint and the vibration nipple joint: the vibrating nipple consists of a mandrel, an upper joint, a lower joint, an outer tube, an intermediate joint and a piston, wherein the lower joint is arranged at one end of the outer tube through the thread of the intermediate joint, the upper joint is arranged at the other end of the outer tube through the thread of the intermediate joint, the mandrel is arranged in the outer tube, one end of the mandrel extends to the outer end of the upper joint, and a disc spring is arranged on the mandrel in the outer tube through a spacer bush and a push plate; the mandrel in the middle joint is provided with a piston through a joint in the mandrel and a joint under the mandrel, and the periphery of the piston is in sliding connection with the inner wall of the middle joint; the vibration nipple is in threaded connection with the vibration nipple through the lower connector.
The mandrel is a reducer tubular body, and the mandrel is in sliding connection with the upper joint.
The joint in the mandrel is in threaded connection with the mandrel; one end of the joint in the mandrel is in threaded connection with the lower joint of the mandrel, and the other end of the joint in the mandrel is in contact connection with the push plate.
The push plate is in sliding connection with the inner wall of the outer tube.
The upper joint is connected with the upper joint; balance holes are respectively arranged on the circumferences of the middle joints.
The oscillating nipple consists of an outer pipe body, a spline sleeve, an oscillating nipple joint, a jet element, a cylinder sleeve, a piston rod, an oscillating piston, a spline shaft, a rotary sleeve, an oscillating disc and a cylinder cover, wherein one end of the outer pipe body is in threaded connection with a lower joint of the oscillating nipple; the other end of the outer pipe body is provided with an oscillating nipple joint through a spline sleeve thread; one end in the outer tube body is fixedly provided with a jet element through a mounting seat, the outer tube body at one side of the jet element is internally provided with a piston rod through a cylinder sleeve and a cylinder cover, and one end head of the piston rod is provided with an oscillating piston through a fixing nut; the other end of the piston rod extends to the outer end of the cylinder cover; a spline shaft is arranged in the spline sleeve and the oscillating nipple joint through a rotating sleeve; a spiral trajectory is arranged on the inner wall of the rotary sleeve and the circumference of the spline shaft corresponding to the rotary sleeve, and a rotary steel ball is arranged in the spiral trajectory; a sliding steel ball is arranged on a spline shaft at one side of the rotating sleeve through a synchronous sleeve, and the spline shaft is in threaded connection with the piston rod.
The spline shaft is provided with a spline shaft center hole, a communication hole is radially formed in the circumference of the spline shaft at one end of the spline shaft center hole, and the communication hole is communicated with the spline shaft center hole.
The rotary sleeve is a cylindrical body, an oscillating disc is fixedly arranged on one end port of the rotary sleeve, and a liquid flow port is eccentrically arranged on the oscillating disc.
The central hole of the oscillating nipple joint at one side of the oscillating disk is internally provided with a blocking plate, the blocking plate is eccentrically provided with a liquid flow hole, and the liquid flow port is in sliding sealing connection with the liquid flow hole.
The jet flow element is rectangular and consists of a middle plate, a left side plate and a right side plate, wherein the left side plate is arranged on one side of the middle plate, a lower communication hole is formed in the left side plate, and the right side plate is arranged on the other side of the middle plate; an upper communication hole is formed in the right side plate; the middle plate, the left side plate and the right side plate are mutually fixed through screws.
The middle plate consists of a wedge, an upper middle plate and a lower middle plate, wherein the upper middle plate and the lower middle plate are arranged in an up-down mode, a horn-shaped liquid flow inlet is arranged at one end between the upper middle plate and the lower middle plate, a V-shaped liquid flow outlet is arranged at the other end, and the liquid flow inlet is communicated with the liquid flow outlet; the liquid outlet is internally provided with a wedge, the upper middle plate is provided with an upper liquid flow cavity, the upper liquid flow cavity is respectively communicated with an upper communication hole and the liquid outlet which are arranged on the right side plate, the upper middle plate on one side of the upper liquid flow cavity is provided with an upper feedback liquid flow cavity, the left side plate corresponding to the upper feedback liquid flow cavity is provided with an upper feedback flow channel, one end of the upper feedback flow channel is communicated with the upper feedback liquid flow cavity, and the other end of the upper feedback flow channel is communicated with the liquid outlet; the lower middle plate is provided with a lower liquid flow cavity, the lower liquid flow cavity is respectively communicated with a lower communication hole and a liquid flow outlet which are arranged on the left side plate, the lower middle plate on one side of the lower liquid flow cavity is provided with a lower feedback liquid flow cavity, the right side plate corresponding to the lower feedback liquid flow cavity is provided with a lower feedback flow channel, one end of the lower feedback flow channel is communicated with the lower feedback liquid flow cavity, and the other end of the lower feedback flow channel is communicated with the liquid flow outlet.
The cylinder sleeve is a cylinder, a piston cavity is arranged in the cylinder sleeve, an upper liquid inlet hole is formed in the cylinder sleeve at the front end of the piston cavity, and the piston cavity is communicated with a liquid flow outlet through the upper liquid inlet hole; a cylinder sleeve lower flow passage is arranged on the cylinder sleeve below the piston cavity, and one end of the cylinder sleeve lower flow passage is communicated with the liquid flow outlet; the other end of the lower runner of the cylinder sleeve is communicated with the piston cavity.
The cylinder sleeve is characterized in that a left runner is arranged on one side of the circumference of the cylinder sleeve and is communicated with a lower communication hole arranged on the left side plate, a right runner is arranged on the other side of the circumference of the cylinder sleeve and is communicated with an upper communication hole arranged on the right side plate.
The cylinder cover is characterized in that a rotary bearing is arranged between the cylinder cover and the piston rod, a sealing ring is arranged between the cylinder cover on one side of the rotary bearing and the piston rod, a left cylinder cover flow channel and a right cylinder cover flow channel are arranged on the circumference of the cylinder cover in a shape corresponding to the left flow channel and the right flow channel of the cylinder sleeve, the left flow channel is communicated with the left cylinder cover flow channel, and the right flow channel is communicated with the right cylinder cover flow channel.
The invention has the beneficial effects that:
the underground hydraulic oscillator is simple in structure, convenient to install, small in radial size, good in horizontal drilling stability, capable of effectively preventing the problem of pressure supporting, capable of achieving hydraulic axial vibration in cooperation with continuous pipe operation in the working process, capable of effectively reducing friction in horizontal well operation and improving efficiency of the horizontal well operation. Is especially suitable for long horizontal well, high inclination, multi-branch horizontal well and other operations.
Drawings
Figure 1 is a schematic view of the structure of the present invention,
figure 2 is a schematic structural view of the vibratory nipple of the present invention,
figure 3 is a schematic structural view of the oscillating nipple of the present invention,
figure 4 is a schematic cross-sectional view of a fluidic element of the present invention,
figure 5 is a schematic view of the cross-sectional structure of the a-a direction in figure 4,
figure 6 is a schematic view of the B-B cross-sectional structure of figure 4,
figure 7 is a schematic view of the C-C cross-sectional structure of figure 4,
figure 8 is a schematic cross-sectional view of the cylinder liner of the present invention,
figure 9 is a schematic cross-sectional view of figure 8,
figure 10 is a schematic cross-sectional view of the cylinder head of the present invention,
fig. 11 is a schematic sectional structure of a cylinder head.
In the figure: 1. vibration nipple, 2, vibration nipple, 3, mandrel, 4, upper joint, 5, lower joint, 6, outer tube, 7, middle joint, 8, piston, 9, spacer, 10, push plate, 11, disc spring, 12, mandrel middle joint, 13, mandrel lower joint, 14, balance hole, 15, outer tube, 16, spline housing, 17, vibration nipple joint, 18, cylinder sleeve, 19, piston rod, 20, vibration piston, 21, spline shaft, 22, rotating housing, 23, vibration disc, 24, cylinder cover, 25, mount pad, 26, middle plate, 27, left plate, 28, right plate, 29, lower communication hole, 30, upper communication hole, 31, wedge, 32, upper middle plate, 33, lower middle plate, 34, liquid inlet, 35, liquid outlet, 36, upper liquid flow chamber, 37, upper feedback liquid flow chamber, 38, upper feedback flow channel, 39, lower liquid flow chamber, 40, lower feedback liquid flow chamber, 41, lower feedback flow channel, 42, piston chamber, 43, upper liquid inlet, 44, cylinder liner lower flow channel, 45, left flow channel, 46, right flow channel, 47, swivel bearing, 48, cylinder head left flow channel, 49, cylinder head right flow channel, 50, spiral trajectory, 51, swivel steel ball, 52, synchronizing sleeve, 53, sliding steel ball, 54, liquid flow port, 55, spline shaft center hole, 56, communication hole, 57, liquid flow hole.
Detailed Description
The underground hydraulic oscillator consists of a vibration nipple 1 and an oscillation nipple 2, wherein the vibration nipple 1 and the oscillation nipple 2 are in threaded connection with each other, the vibration nipple 1 consists of a mandrel 3, an upper joint 4, a lower joint 5, an outer tube 6, an intermediate joint 7 and a piston 8, one end of the outer tube 6 is provided with the lower joint 5 through the intermediate joint 7 in a threaded manner, the other end of the outer tube 6 is provided with the upper joint 4 in a threaded manner, a mandrel 3 is arranged in the outer tube 6, one end of the mandrel 3 extends to the outer end of the upper joint 4, the mandrel 3 is a reducer tubular body, and the mandrel 3 is in sliding connection with the upper joint 4.
A disc spring 11 is arranged on the mandrel 3 in the outer tube 6 through a spacer bush 10 and a push plate 9; the push plate 11 is in sliding connection with the inner wall of the outer tube 6. The mandrel 3 in the middle joint 7 is provided with a piston 8 through a mandrel middle joint 12 and a mandrel lower joint 13, and the periphery of the piston 8 is in sliding connection with the inner wall of the middle joint 7; a sealing ring is arranged between the periphery of the piston 8 and the middle joint 7; to ensure tightness between the piston 8 and the intermediate joint 7. The central spindle joint 12 and the lower central spindle joint 13 are respectively tubular bodies, and the central spindle joint 12 is in threaded connection with the central spindle 3; one end of the joint 12 in the mandrel is in threaded connection with the lower joint 13 of the mandrel, and the other end of the joint 12 in the mandrel is in contact connection with the push plate 10. Balance holes 14 are provided on the circumferences of the upper joint 4 and the intermediate joint 7, respectively, to ensure pressure balance inside and outside the outer tube 6 in operation. The vibration nipple 1 is in threaded connection with the vibration nipple 2 through a lower joint 5.
The vibration nipple 2 consists of an outer pipe body 15, a spline sleeve 16, a vibration nipple joint 17, a jet flow element, a cylinder sleeve 18, a piston rod 19, a vibration piston 20, a spline shaft 21, a rotary sleeve 22, a vibration disc 23 and a cylinder cover 24, wherein one end of the outer pipe body 15 is in threaded connection with a lower joint 5 of the vibration nipple 1; the other end of the outer tube body 15 is provided with an oscillation nipple joint 17 through a spline housing 16 in a threaded manner; the inner end of the outer tube body 15 is fixedly provided with a mounting seat 25, and one side of the mounting seat 2 is fixedly provided with a jet element through a fixing bolt.
The jet flow element is rectangular and consists of a middle plate 26, a left side plate 27 and a right side plate 28, wherein the left side plate 27 is arranged on one side of the middle plate 26, a lower communication hole 29 is arranged on the left side plate 27, and the right side plate 28 is arranged on the other side of the middle plate 26; the right side plate 28 is provided with an upper communication hole 30; the middle plate 26, the left side plate 27 and the right side plate 28 are fixed to each other by screws.
The middle plate 26 is composed of a wedge 31, an upper middle plate 32 and a lower middle plate 33, the upper middle plate 32 and the lower middle plate 33 are arranged in an up-down mode, a horn-shaped liquid flow inlet 34 is arranged at one end between the upper middle plate 32 and the lower middle plate 33, a V-shaped liquid flow outlet 35 is arranged at the other end, and the liquid flow inlet 34 is communicated with the liquid flow outlet 35; the liquid outlet 35 is internally provided with the wedge 31, and the wedge 31 is in a conical shape, and the liquid flowing in can be split into an upper part and a lower part under the action of the conical wedge because the wedge 31 is arranged in the liquid outlet 35.
An upper liquid flow cavity 36 is arranged on the upper middle plate 32, the upper liquid flow cavity 36 is respectively communicated with an upper communication hole 30 and a liquid flow outlet 35 which are arranged on the right side plate 28, an upper feedback liquid flow cavity 37 is arranged on the upper middle plate 28 on one side of the upper liquid flow cavity 36, an upper feedback flow channel 38 is arranged on the left side plate 27 corresponding to the upper feedback liquid flow cavity 37, one end of the upper feedback flow channel 38 is communicated with the upper feedback liquid flow cavity 37, and the other end of the upper feedback flow channel 38 is communicated with the liquid flow outlet 35; an upper feedback fluid chamber 37 communicates with the trailing end of the fluid inlet 34.
The lower middle plate 33 is provided with a lower liquid flow cavity 39, the lower liquid flow cavity 39 is respectively communicated with a lower communication hole 29 and a liquid flow outlet 35 which are arranged on the left side plate 27, the lower middle plate 33 on one side of the lower liquid flow cavity 39 is provided with a lower feedback liquid flow cavity 40, the right side plate 28 corresponding to the lower feedback liquid flow cavity 40 is provided with a lower feedback flow channel 41, one end of the lower feedback flow channel 41 is communicated with the lower feedback liquid flow cavity 40, and the other end of the lower feedback flow channel 41 is communicated with the liquid flow outlet 35. A lower feedback fluid chamber 40 communicates with the trailing end of the fluid inlet 34.
The outer tube 15 on one side of the jet element is internally provided with a piston rod 19 through a cylinder sleeve 18 and a cylinder cover 24, the cylinder sleeve 18 is a cylinder, a piston cavity 42 is arranged in the cylinder sleeve 18, an upper liquid inlet 43 is arranged on the cylinder sleeve 18 at the front end of the piston cavity 42, and the front end of the piston cavity 42 is communicated with the liquid flow outlet 35 through the upper liquid inlet 43; a cylinder sleeve lower runner 44 is arranged on the cylinder sleeve 18 below the piston cavity 42, and one end of the cylinder sleeve lower runner 44 is communicated with the liquid flow outlet 35; the other end of the cylinder liner lower flow passage 35 communicates with the rear end of the piston chamber 42.
The cylinder liner 18 is provided with a left flow passage 45 on one side of the circumference thereof (the left flow passage 45 is formed by a groove on the left side of the circumference of the cylinder liner 18 being fitted with the inner wall of the outer tube body 15), the left flow passage 45 is communicated with the lower communication hole 29 provided on the left side plate 27, the cylinder liner 18 is provided with a right flow passage 46 on the other side of the circumference thereof (the right flow passage 46 is formed by a groove on the right side of the circumference of the cylinder liner 18 being fitted with the inner wall of the outer tube body 15), and the right flow passage 46 is communicated with the upper communication hole 30 provided on the right side plate 28.
An oscillating piston 20 is arranged at one end head of the piston rod 19 in the piston cavity 42 through a fixed nut; the other end of the piston rod 19 extends to the outer end of the cylinder cover 24; a rotary bearing 47 is arranged between the cylinder cover 24 and the piston rod 19, and a sealing ring is arranged between the cylinder cover 24 on one side of the rotary bearing 47 and the piston rod 19 so as to ensure the sealing in the cylinder sleeve 18. A left cylinder head flow passage 48 and a right cylinder head flow passage 49 are arranged on the circumference of the cylinder head 24 corresponding to the left flow passage 45 and the right flow passage 46 of the cylinder sleeve 18, the left flow passage 45 is communicated with the left cylinder head flow passage 48, and the right flow passage 46 is communicated with the right cylinder head flow passage 49.
A spline shaft 21 is arranged in the spline housing 16 and the oscillation nipple joint 17 at one side of the cylinder cover 24 through a rotating housing 22; a piston rod 19 extending to the outer end of the cylinder head 24 is screwed with the spline shaft 21. The spline shaft 21 is connected with the spline housing 16 by a sliding key; a spiral trajectory 50 is respectively arranged on the inner wall of the rotary sleeve 22 and the circumference of the spline shaft 21 corresponding to the inner wall, and a rotary steel ball 51 is arranged in the spiral trajectory 50; in order to maintain uniform arrangement of the rotating steel balls 51, the rotating steel balls 51 may be arranged by a cage to avoid the piling of the rotating steel balls 51 during operation. Ball bearings are arranged between the rotary sleeve 22 and the oscillation nipple joint 17 to ensure the flexibility of rotation of the rotary sleeve 22.
A sliding steel ball 53 is mounted on the spline shaft 21 at one side of the rotating sleeve 22 through a synchronizing sleeve 52 for supporting and sliding the spline shaft 21. The synchronizing sleeve 52 and the rotating sleeve 22 are respectively cylindrical bodies, mounting grooves are axially and uniformly distributed on the circumference of the synchronizing sleeve 52 and are used for mounting sliding steel balls 53, an oscillating disc 23 is fixedly arranged on one end port of the rotating sleeve 22, and a liquid flow port 54 is eccentrically arranged on the oscillating disc 23.
The spline shaft 21 is provided with a spline shaft center hole 55, a communication hole 56 is radially arranged on the circumference of the spline shaft 21 at one end of the spline shaft center hole 55, and the communication hole 56 is communicated with the spline shaft center hole 55. The communication hole 56 communicates with both the head left flow passage 48 and the head right flow passage 49.
A closure plate is arranged in the central hole of the oscillating nipple joint 17 at one side of the oscillating disk 23, a liquid flow hole 57 is eccentrically arranged on the closure plate, and the liquid flow hole 54 is in sliding sealing connection (intermittent contact connection) with the liquid flow hole 57.
When the downhole hydraulic oscillator works in cooperation with a coiled tubing, drilling fluid firstly enters the oscillating nipple 2 through a through hole in the middle of a mandrel 3 of the oscillating nipple 1, the drilling fluid entering the oscillating nipple 2 enters the jet element through a fluid inlet 34 of the jet element, and the drilling fluid enters the jet element in a horn shape due to the fact that the fluid inlet 34 is large, small and out, has a certain flow limiting function, forms high-pressure jet under the action of the fluid inlet 34, and then is ejected out through a fluid outlet 35. The drilling fluid at the upper part of the wedge 31 enters the piston cavity 42 at the front end of the oscillating piston 20 through the upper fluid inlet hole 43, the drilling fluid at the lower part of the wedge 31 is collected at the rear end face of the oscillating piston 20 through the cylinder sleeve lower flow passage 44 and forms pressure to act on the rear end face of the oscillating piston 20, meanwhile, as the volume of the cylinder sleeve lower flow passage 44 is small relative to the volume of the piston cavity 42, after the drilling fluid collected at the rear end face of the oscillating piston 20 is filled in the cavity, the pressure pushes the oscillating piston 20 to move forward (to the left end of the piston cavity 42); in this process, the front end surface of the oscillating piston 20 presses the drilling fluid in the piston chamber 42, forcing the drilling fluid in the piston chamber 42 to be discharged through the upper fluid intake hole 43.
While the drilling fluid is discharged from the upper fluid inlet hole 43 and the oscillating piston 20 moves forward, the oscillating piston 20 drives the spline shaft 21 to move forward through the piston rod 19, and as the spline shaft 21 is arranged on the oscillating nipple joint 17 through the rotary sleeve 22, a spiral trajectory 50 is respectively arranged on the inner wall of the rotary sleeve 22 and the circumference of the spline shaft 21 corresponding to the inner wall of the rotary sleeve 22, and a rotary steel ball 51 is arranged in the spiral trajectory 50; in the process of driving the spline shaft 21 to move forward by the piston rod 19, the rotary sleeve 22 starts to rotate under the action of the spiral trajectory 50 and the rotary steel ball 51 arranged in the spiral trajectory 50, so that the oscillating disc 23 is driven to rotate, and periodic closing and opening are generated between the liquid flow port 54 and the liquid flow hole 57.
During the forward movement of the oscillating piston 20, drilling fluid at the upper part of the wedge 31 does not enter the piston cavity 42 through the upper fluid inlet 43 any more; at this time, a part of the drilling fluid in the upper part of the wedge 31 and in the upper fluid inlet 43 enters the upper feedback fluid chamber 37 through the upper feedback flow channel 38, and another part of the drilling fluid enters the upper fluid chamber 36.
Because the upper feedback liquid flow cavity 37 is communicated with the tail end of the liquid flow inlet 34, after the drilling fluid entering the upper feedback liquid flow cavity 37 is converged with the drilling fluid continuously entering the liquid flow inlet 34, the drilling fluid is continuously converged at the rear end face of the oscillating piston 20 by the cylinder sleeve lower flow passage 44, so that the oscillating piston 20 continuously moves forward and moves to the extreme position.
Drilling fluid entering the upper liquid flow cavity 36 enters the center hole 55 of the spline shaft through the upper communication hole 30, the right runner 46, the cylinder cover right runner 49 and the communication hole 56; then is discharged through the liquid flow port 54 and the liquid flow hole 57, and the liquid flow port 54 and the liquid flow hole 57 are respectively arranged eccentrically; and the oscillating disk 23 rotates with the rotating sleeve 22; during the rotation of the oscillating disk 23, the liquid flow port 54 and the liquid flow hole 57 are periodically closed and opened; the flow area is thus periodically changed, so that a pressure pulse is formed, which can act against the vibration nipple 1 via the vibration nipple connection 17, the spline housing 16 and the outer tubular body 15.
In the process of periodically closing and opening the fluid flow port 54 and the fluid flow port 57, when the fluid flow port 54 and the fluid flow port 57 are closed (when the fluid flow port 54 and the fluid flow port 57 are in a dislocation state), the drilling fluid flow passage is integrally cut off; the drilling fluid in the vibration pup joint 1 is converged under the flow limiting effect of the fluid inlet 34 and acts on the right end face of the piston 8, and the piston 8 is pushed to move forwards (move rightwards) along with the pressure increase of the drilling fluid in the process; the piston 8 drives the joint 12 in the mandrel and the lower joint 13 of the mandrel to integrally move, so that the mandrel 3 is driven to extend out of the upper joint 4, and an axial impact force of the mandrel 3 is formed; the axial impact force is matched with the pressure pulse of the oscillation nipple 2 to drive the continuous oil pipe, so that static friction between the continuous oil pipe and a well wall can be converted into dynamic friction, and the friction direction is changed, thereby reducing energy loss caused by friction and playing a role in reducing friction resistance. The central spindle 3 extends out of the upper joint 4, and meanwhile, the joint 12 in the central spindle compresses the disc spring 11 through the push plate 9 to enable the disc spring 11 to elastically deform and store energy; when the disc spring 11 is compressed to a limit, the drilling fluid flow passage is integrally communicated when the fluid flow port 54 and the fluid flow hole 57 are opened (when the fluid flow port 54 and the fluid flow hole 57 are in a superposition state); drilling fluid enters the jet element again through the fluid inlet 34, at the moment, the drilling fluid pressure of the vibration nipple 1 is smaller than the tension of the disc spring 11, and the mandrel 3 is reset under the action of the disc spring 11.
The drilling fluid re-entering the jet element is split again into an upper part and a lower part under the action of the wedge 31. The drilling fluid at the lower part of the wedge 31 is in a full liquid state and does not enter the cylinder sleeve lower flow passage 44 any more, the drilling fluid at the upper part of the wedge 31 enters the piston cavity 42 through the upper liquid inlet hole 43 and acts on the front end face of the oscillating piston 20, and the oscillating piston 20 is pushed to return backward along with the increase of pressure, in the process of the oscillating piston 20, the rear end face of the oscillating piston 20 presses the drilling fluid in the piston cavity 42, so that the drilling fluid in the piston cavity 42 at the rear end of the oscillating piston 20 is forced to be discharged by the cylinder sleeve lower flow passage 44.
While the drilling fluid is discharged from the cylinder sleeve lower runner 44 and the oscillating piston 20 is reset in the backward direction, the oscillating piston 20 drives the spline shaft 21 to reset in the backward direction through the piston rod 19, and as the spline shaft 21 is arranged on the oscillating nipple joint 17 through the rotary sleeve 22, a spiral trajectory 50 is respectively arranged on the inner wall of the rotary sleeve 22 and the circumference of the spline shaft 21 corresponding to the inner wall of the rotary sleeve, and a rotary steel ball 51 is arranged in the spiral trajectory 50; in the process of driving the spline shaft 21 to move backwards by the piston rod 19, under the action of the spiral trajectory 50 and the rotating steel balls 51 arranged in the spiral trajectory 50, the rotating sleeve 22 starts to rotate reversely, so that the oscillating disc 23 is driven to rotate reversely, and periodic closing and opening are generated between the liquid flow port 54 and the liquid flow hole 57 again.
During the backward reset process of the oscillating piston 20, drilling fluid at the upper part of the wedge 31 continuously enters the piston cavity 42 through the upper fluid inlet 43; at this time, a part of the drilling fluid in the lower part of the wedge 31 and in the cylinder liner lower flow passage 44 enters the lower feedback flow chamber 40 through the lower feedback flow passage 41, and another part of the drilling fluid enters the lower flow chamber 39.
Because the lower fluid chamber 39 is communicated with the tail end of the fluid inlet 34, after the drilling fluid entering the lower fluid chamber 39 is converged with the drilling fluid continuously entering the fluid inlet 34, the drilling fluid enters through the upper fluid inlet 43 and is continuously converged in the piston chamber 42 at the front end of the oscillating piston 20, so that the oscillating piston 20 continuously moves backward and moves to the limit position.
Drilling fluid entering the lower fluid flow cavity 39 enters the spline shaft center hole 55 through the lower communication hole 29, the left flow passage 45, the cylinder cover left flow passage 48 and the communication hole 56; then is discharged through the liquid flow port 54 and the liquid flow hole 57, and the liquid flow port 54 and the liquid flow hole 57 are respectively arranged eccentrically; and the oscillating disk 23 rotates with the rotating sleeve 22; during the rotation of the oscillating disk 23, the liquid flow port 54 and the liquid flow hole 57 are periodically closed and opened; the flow area is thus periodically changed, so that a pressure pulse is formed, which can act against the vibration nipple 1 via the vibration nipple connection 17, the spline housing 16 and the outer tubular body 15, so that one working cycle is completed.
The underground hydraulic oscillator is simple in structure, convenient to install, small in radial size, good in horizontal drilling stability, capable of effectively preventing the problem of pressure supporting, capable of matching with a coiled tubing in the working process, capable of achieving hydraulic axial vibration under the double matching effect of the pressure pulse of the vibration nipple 2 and the axial impact of the vibration nipple 1, further capable of enabling static friction between the coiled tubing and a well wall to be converted into dynamic friction, capable of changing the friction direction, and therefore energy loss caused by friction is reduced, and therefore efficiency of horizontal well operation is improved. Is especially suitable for long horizontal well, high inclination, multi-branch horizontal well and other operations.
Claims (7)
1. The utility model provides a hydraulic oscillator in pit, it comprises vibration nipple joint (1) and vibration nipple joint (2), mutual threaded connection between vibration nipple joint (1) and the vibration nipple joint (2), vibration nipple joint (1) constitute by dabber (3), upper joint (4), lower joint (5), outer tube (6), intermediate head (7) and piston (8), lower joint (5) are installed through intermediate head (7) screw thread to one end of outer tube (6), upper joint (4) are installed to the other end screw thread of outer tube (6), be provided with dabber (3) in outer tube (6), one end of dabber (3) extends to the upper joint (4) outer end, dish spring (11) are installed through spacer bush (10) and push pedal (9) on dabber (3) in outer tube (6); a piston (8) is arranged on the mandrel (3) in the intermediate joint (7) through a mandrel middle joint (12) and a mandrel lower joint (13), and the periphery of the piston (8) is in sliding connection with the inner wall of the intermediate joint (7); vibration nipple joint (1) is through lower joint (5) and vibration nipple joint (2) threaded connection, its characterized in that: the vibration nipple (2) consists of an outer pipe body (15), a spline sleeve (16), a vibration nipple joint (17), a jet flow element, a cylinder sleeve (18), a piston rod (19), a vibration piston (20), a spline shaft (21), a rotating sleeve (22), an oscillating disc (23) and a cylinder cover (24), wherein one end of the outer pipe body (15) is in threaded connection with a lower joint (5) of the vibration nipple (1); the other end of the outer pipe body (15) is provided with an oscillating nipple joint (17) through a spline housing (16) in a threaded manner; a jet flow element is fixedly arranged at one end in the outer tube body (15) through a mounting seat (25), a piston rod (19) is arranged in the outer tube body (15) at one side of the jet flow element through a cylinder sleeve (18) and a cylinder cover (24), and an oscillating piston (20) is arranged at one end head of the piston rod (19) through a fixing nut; the other end of the piston rod (19) extends to the outer end of the cylinder cover (24); a spline shaft (21) is arranged in the spline sleeve (16) and the oscillation nipple joint (17) through a rotating sleeve (22); a spiral trajectory (50) is arranged on the inner wall of the rotary sleeve (22) and the circumference of the spline shaft (21) corresponding to the rotary sleeve, and a rotary steel ball (51) is arranged in the spiral trajectory (50); a sliding steel ball (53) is arranged on a spline shaft (21) at one side of the rotary sleeve (22) through a synchronous sleeve (52), and the spline shaft (21) is in threaded connection with the piston rod (19);
the spline shaft (21) is provided with a spline shaft center hole (55), a communication hole (56) is radially formed in the circumference of the spline shaft (21) at one end of the spline shaft center hole (55), and the communication hole (56) is communicated with the spline shaft center hole (55);
the rotary sleeve (22) is a cylindrical body, an oscillating disc (23) is fixedly arranged on one end port of the rotary sleeve (22), and a liquid flow port (54) is eccentrically arranged on the oscillating disc (23).
2. A downhole hydraulic oscillator according to claim 1, wherein: the mandrel (3) is a reducer tubular body, and the mandrel (3) is in sliding connection with the upper joint (4); balance holes (14) are respectively arranged on the circumferences of the upper joint (4) and the middle joint (12).
3. A downhole hydraulic oscillator according to claim 2, wherein: the joint (12) in the mandrel is in threaded connection with the mandrel (3); one end of the joint (12) in the mandrel is in threaded connection with the lower joint (13) of the mandrel, and the other end of the joint (12) in the mandrel is in contact connection with the push plate (9); the push plate (9) is in sliding connection with the inner wall of the outer tube (6).
4. A downhole hydraulic oscillator according to claim 1, wherein: a blocking plate is arranged in a central hole of the oscillating nipple joint (17) at one side of the oscillating disc (23), a liquid flow hole (57) is eccentrically arranged on the blocking plate, and the liquid flow hole (54) is in sliding sealing connection with the liquid flow hole (57).
5. A downhole hydraulic oscillator according to claim 1, wherein: the cylinder sleeve (18) is a cylinder, a piston cavity (42) is arranged in the cylinder sleeve (18), an upper liquid inlet hole (43) is formed in the cylinder sleeve (18) at the front end of the piston cavity (42), and the piston cavity (42) is communicated with a liquid flow outlet (35) of the jet element through the upper liquid inlet hole (43); a cylinder sleeve lower runner (44) is arranged on the cylinder sleeve (18) below the piston cavity (42), and one end of the cylinder sleeve lower runner (44) is communicated with the liquid flow outlet (35); the other end of the cylinder sleeve lower runner (44) is communicated with the piston cavity (42).
6. A downhole hydraulic oscillator according to claim 5, wherein: the cylinder sleeve (18) circumference one side be provided with left runner (45), left runner (45) and jet component's left side board (27) on lower intercommunicating pore (29) set up, cylinder sleeve (18) circumference opposite side is provided with right runner (46), right runner (46) and jet component's right side board (28) on upper intercommunicating pore (30) set up.
7. A downhole hydraulic oscillator according to claim 1, wherein: a rotary bearing (47) is arranged between the cylinder cover (24) and the piston rod (19), a sealing ring is arranged between the cylinder cover (24) on one side of the rotary bearing (47) and the piston rod (19), a cylinder cover left flow passage (48) and a cylinder cover right flow passage (49) are correspondingly arranged on the circumference of the cylinder cover (24) and correspond to the left flow passage (45) and the right flow passage (46) of the cylinder sleeve (18), the left flow passage (45) is communicated with the cylinder cover left flow passage (48), and the right flow passage (46) is communicated with the cylinder cover right flow passage (49).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810504863.0A CN108442883B (en) | 2018-05-24 | 2018-05-24 | Underground hydraulic oscillator |
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| CN201810504863.0A CN108442883B (en) | 2018-05-24 | 2018-05-24 | Underground hydraulic oscillator |
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| CN108442883B true CN108442883B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109779531B (en) * | 2019-03-07 | 2023-09-19 | 长江大学 | Jet oscillating bidirectional impactor |
| US11624240B2 (en) | 2020-08-25 | 2023-04-11 | Saudi Arabian Oil Company | Fluidic pulse activated agitator |
| CN112227956B (en) * | 2020-09-18 | 2023-01-24 | 长江大学 | Jet-type hydraulic pulse nipple |
| CN115247556B (en) * | 2022-08-03 | 2023-05-05 | 西南石油大学 | Oscillating pulse cavitation device |
| CN116201482B (en) * | 2023-02-27 | 2024-03-12 | 湖北龙脉宜和石油科技有限公司 | Screw type underground hydraulic oscillator |
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| US8627890B2 (en) * | 2007-07-27 | 2014-01-14 | Weatherford/Lamb, Inc. | Rotating continuous flow sub |
| CN102747958B (en) * | 2012-07-23 | 2015-01-07 | 中国石油大学(华东) | Compound vibrating well-drilling tool |
| CN107654193B (en) * | 2017-11-21 | 2023-09-19 | 长江大学 | Hydraulic control double-acting hydraulic oscillation drilling tool |
| CN208502663U (en) * | 2018-05-24 | 2019-02-15 | 长江大学 | A kind of downhole hydraulic oscillator |
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