CN210564366U - Aperiodic coupling hydraulic induced vibration type coiled tubing resistance reducing device - Google Patents
Aperiodic coupling hydraulic induced vibration type coiled tubing resistance reducing device Download PDFInfo
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- CN210564366U CN210564366U CN201921653098.5U CN201921653098U CN210564366U CN 210564366 U CN210564366 U CN 210564366U CN 201921653098 U CN201921653098 U CN 201921653098U CN 210564366 U CN210564366 U CN 210564366U
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Abstract
The aperiodic coupling hydraulic induced vibration type coiled tubing drag reduction device comprises an upper joint, a periodic mechanical vibration module, an aperiodic fluid vibration module and a lower joint; the top connection is connected with one end of the hydraulic cylinder through the taper threads, the other end of the hydraulic cylinder is connected with one end of the sealing base through the pipe threads, the other end of the sealing base is connected with one end of the outer shell of the vortex street vibration chamber through the threads, the other end of the outer shell of the vortex street vibration chamber is connected with one end of the outer shell of the wall-attached vibration chamber through the taper threads, and the other end of the outer shell of the wall-attached vibration chamber is connected with the lower. The utility model discloses a periodic vibration between each part, aperiodic vibration's instantaneous coupling effect produce and last reliable vibration and turn into the stiction power with the stiction between coiled tubing and the wall of a well to reduce the wearing between coiled tubing and the wall of a well and hinder, remove coiled tubing "lock" phenomenon even, the coupling effect of attenuator axial vibration and radial vibration has improved the comprehensive drag reduction effect of attenuator.
Description
Technical Field
The utility model relates to a resistance absorber technical field, in particular to aperiodic coupling water conservancy lures formula coiled tubing fairing that shakes.
Background
China has abundant shale gas, but the research is late. Shale gas is special in reservoir conditions and physical properties, difficult to mine and needs to adopt a new drilling technology and a new mining process.
At present, the coiled tubing technology is widely applied to the field of petroleum exploration and development, shows good development prospect, and becomes one of the characteristic technologies of the petroleum engineering technology. In recent years, with the gradual increase of the number of horizontal wells, extended reach wells and multilateral wells and the development of slim hole drilling technology, the advantages of the coiled tubing technology in the operation of the wells are more and more obvious, and the application is more and more extensive. However, because the coiled tubing has the characteristics of relatively small size, relatively large flexibility, no rotation, difficulty in pressurization and the like, the frictional resistance between the coiled tubing and the well wall is large, and the effective bit pressure transmitted to a drill bit is small. In the process of putting the continuous pipe into the well, under the combined action of the injection force and the well bottom friction force, buckling is easy to occur, and even the continuous pipe is locked, so that the application of the continuous pipe in a large-displacement well and a horizontal well is limited. The coiled tubing drag reducer is used as one of coiled tubing downhole tool combinations, and can effectively reduce the frictional resistance between a coiled tubing and a well wall, improve the mechanical drilling speed, shorten the operation period, improve the coiled tubing drilling efficiency and prolong the running extension size of the coiled tubing. At present, various underground coiled tubing drag reducers are developed abroad, good application effects are achieved in the actual operation of coiled tubing, and the research in China is in the starting stage, so that the underground coiled tubing drag reducer has practical significance for the research of the underground coiled tubing drag reducers.
The drag reducer applied to the operation of the continuous oil pipe can be divided into the following parts according to the drag reduction vibration direction: axial drag reduction, radial drag reduction; according to its working principle can be divided into: mechanical vibration damping devices, fluid vibration damping devices. At present, the following are the drag reducers widely used in oil fields. The roller drag reducer utilizes the roller to convert static friction into dynamic friction, but the roller is easy to wear and needs to be periodically checked and replaced. Hydraulic flow reducers utilize a variable flow valve to create a change in the volume of the fluid flowing through the drill string, creating a hydraulic pulse, but are significantly affected by the properties of the drilling fluid. The E-line Agitator, a coiled tubing drilling drag reduction tool developed by National Oilwell Varco, was modified from the drag reducer used in large bore drilling, with the pressure effect of the drilling fluid being greater.
Disclosure of Invention
In order to solve the technical problem, the utility model aims to provide an aperiodic coupling water conservancy lures formula coiled tubing fairing that shakes, through periodic vibration between each part, aperiodic vibration's instantaneous coupling effect produces and lasts reliable vibration and turns into the kinetic friction power with the static friction power between coiled tubing and the wall of a well to reduce the friction between coiled tubing and the wall of a well, relieve coiled tubing "lock" phenomenon even, the coupling effect of attenuator axial vibration and radial vibration has improved the synthetic drag reduction effect of attenuator.
In order to realize the purpose, the utility model discloses a technical scheme is:
the aperiodic coupling hydraulic induced vibration type coiled tubing drag reduction device comprises an upper joint 1, a periodic mechanical vibration module, an aperiodic fluid vibration module and a lower joint 16;
the upper joint 1 is connected with one end of a hydraulic cylinder 2 through conical threads, the other end of the hydraulic cylinder 2 is connected with one end of a sealing base 7 through pipe threads, the other end of the sealing base 7 is connected with one end of a vortex street vibration chamber outer shell 9 through threads, the other end of the vortex street vibration chamber outer shell 9 is connected with one end of an attached wall vibration chamber outer shell 12 through conical threads, and the other end of the attached wall vibration chamber outer shell 12 is connected with a lower joint 16 through conical threads.
Periodic mechanical vibration module include pneumatic cylinder 2, the inside cavity of pneumatic cylinder 2, piston 4 has been arranged in the annular space of 2 inside of pneumatic cylinder, piston 4 and 2 inner wall interference fit of pneumatic cylinder, and seal through O type sealing washer, it presses valve 6 and four pressure inlet holes 5 to have arranged two accuse on 2 inner walls of pneumatic cylinder, the accuse presses valve 6 to weld on 2 inner walls of pneumatic cylinder, 7 both ends of seal base are the screw thread, seal base 7 has arranged the annular through groove that allows piston rod 8 to pass through, and arranged O type sealing washer.
The pressure control valve 6 comprises a cone 17, a disc spring 18 and a valve body 19, wherein the cone 17 and the conical groove of the valve body 19 are assembled in a clearance fit mode, and the disc spring 18 is arranged in the cylindrical groove of the valve body 19.
The non-periodic fluid vibration module comprises an attaching wall vibration chamber and a vortex street vibration chamber.
The vortex street vibration chamber comprises a hollow shaft 11 and a vortex street excitation cylinder 10, the number of the vortex street excitation cylinders 10 is three, the vortex street excitation cylinders are fixed on the hollow shaft 11 in an interference fit and gluing mode, and the hollow shaft 11 and the vortex street excitation cylinder 10 are suspended and are not restricted to be arranged in an outer shell 9 of the vortex street vibration chamber.
The vortex street excitation cylinder 10 is made of a cylindrical rubber rod, and the size of the vortex street excitation cylinder is close to the inner diameter of the outer shell 9 of the vortex street vibration chamber.
The wall-attached vibration chamber comprises a bionic volute 13 and a shaft 15, the bionic volute 13 is fixed on the shaft 15 in a gluing mode, and the shaft 15 is fixedly restrained at two ends by a hollow support 14.
The bionic volute 13 is made of rubber and is of a conical structure.
The hollow support 14 is provided with a circular hole in the middle, the shaft 15 penetrates through the hole, and round holes are arranged around the hole at equal intervals.
The utility model has the advantages that:
(1) the design is based on the karman vortex street effect and the coanda effect in fluid mechanics, and the non-periodic fluid vibration chamber which is a vortex street vibration chamber and a coanda vibration chamber and has a simple structure and a reliable vibration principle is innovatively designed.
(2) The design of the wall-attached vibration chamber adopts a bionic volute design scheme, and the design of the vortex street vibration chamber adopts a non-uniform and multi-row streaming cylinder design.
(3) Axial vibration generated by the periodic mechanical vibration module is coupled with axial vibration generated by the non-periodic fluid vibration chamber, and main power for reducing resistance of the resistance reducer is provided; the radial vibration excited by the wall-attached vibration chamber is coupled with the radial vibration excited by the vortex street vibration chamber, so that the auxiliary power for reducing the resistance of the resistance reducer is provided.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the periodic mechanical vibration module of the present invention.
Fig. 3 is the structural schematic diagram of the pressure control valve of the present invention.
Fig. 4 is a schematic view of the vortex street vibration chamber of the present invention.
Fig. 5 is a schematic view of the wall-attached vibration chamber of the present invention.
Fig. 6 is a schematic view of the hollow support structure of the present invention.
Fig. 7 is a flow chart of the scheme of the periodic mechanical vibration module of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2: the aperiodic coupling hydraulic induced vibration type coiled tubing drag reduction device mainly comprises an upper joint 1, periodic mechanical vibration modules 2-8, aperiodic fluid vibration modules 9-15 (comprising an attached wall vibration chamber 12-15 and a vortex street vibration chamber 9-11) and a lower joint 16.
The upper joint 1 and the hydraulic cylinder 2 of the periodic mechanical vibration module are connected through conical threads, the hydraulic cylinder 2 and the sealing base 7 are connected through pipe threads, the sealing base 7 and the vortex street vibration chamber outer shell 9 are connected through threads, the vortex street vibration chamber outer shell 9 is connected with the wall-attached vibration chamber outer shell 12 through conical threads, and the lower joint 16 and the wall-attached vibration chamber outer shell 12 are connected through conical threads.
The periodic mechanical vibration module is composed of a hydraulic cylinder 2, a disc spring 3, a sealing base 7, a piston 4, a piston rod 8 and a pressure control valve 6. 2 inside hollows of pneumatic cylinder, piston 4 has been arranged in 2 inside annular spaces of pneumatic cylinder, 2 inner wall interference fit of piston 4 and pneumatic cylinder, and seal through O type sealing washer, it presses valve 6 and four pressure inlet hole 5 to have arranged two accuses on 2 inner walls of pneumatic cylinder, the accuse presses valve 6 to weld on 2 inner walls of pneumatic cylinder, 7 both ends of seal base are the screw thread, play sealed and connected effect, seal base 7 has arranged the annular through groove that allows piston rod 8 to pass through, and arranged O type sealing washer, in order to prevent pressure leakage.
As shown in fig. 3: the pressure control valve 6 consists of a cone 17, a disc spring 18 and a valve body 19. The cone 17 is assembled with the conical groove of the valve body 19 through clearance fit, and the disc spring 18 is arranged in the cylindrical groove of the valve body 19.
As shown in fig. 4: the vortex street vibration chamber 9-11 is composed of a vortex street vibration chamber outer shell 9, a vortex street excitation cylinder 10 and a hollow shaft 11. The vortex street excitation cylinder 10 is made of a cylindrical rubber rod, the size of the vortex street excitation cylinder is close to the inner diameter of the outer shell 9 of the vortex street vibration chamber, and the number of the vortex street excitation cylinders 10 is three, and the vortex street excitation cylinders are fixed on the hollow shaft 11 in an interference fit and gluing mode. The hollow shaft 11 and the vortex street excitation column 10 are suspended and are not restricted to be arranged in the outer shell 9 of the vortex street vibration chamber.
As shown in fig. 5: the coanda vibration chamber 12-15 is composed of a coanda vibration chamber outer shell 12, a bionic volute 13, a hollow support 14 and a shaft 15. The bionic volute 13 is made of rubber, is enlarged according to a certain proportion according to an actual volute, and is fixed on a shaft 15 in a cementing mode, and the shaft 15 is fixedly restrained at two ends by a hollow support 14. The concrete structure of the hollow support is shown in fig. 6.
(1) Upper joint 1, lower joint 16
Because the coiled tubing cannot rotate in the working process and the specifications of the coiled tubing in actual operation are different, special coiled tubing joints with different specifications must be configured to be connected with the coiled tubing conveniently. The coiled tubing drag reduction device in the design is provided with the upper joint 1 and the lower joint 16 of different specifications, so that the applicability of the drag reduction device is greatly improved.
(2) Periodic mechanical vibration module
The periodic mechanical vibration module mainly comprises a hydraulic cylinder 2, a piston rod 8, a pressure control valve 6 and the like. The periodic mechanical vibration is generated under the action of the pressure difference through the hydraulic cylinder 2, the pressure control valve 6, the piston rod 8 and the like. The hydraulic cylinder 2 is driven mainly by the well fluid, which generates pressure in the hydraulic cylinder 2 as driving power for the mechanical oscillating part. The pressure control valve 6 is a core working mechanism for pressure regulation, energy storage control and pressure relief of the periodic mechanical vibration module. The main function of the pressure control valve 6 is to control the increase and instantaneous decrease of the fluid pressure in the hydraulic cylinder. The hydraulic cylinder 2 is suppressed under the action of a fluid medium in the well, when the liquid pressure reaches a threshold value, the cone 17 of the pressure control valve 6 is opened, the pressure is instantly released, and the kinetic energy is transmitted to the piston rod 8 by the disc spring 3. The piston rod 8 mainly has the effects that impact force generated by the hydraulic cylinder 2 is transmitted to the shell, fluid generates pressure in the hydraulic cylinder, pressure is relieved through the pressure control valve 6, pressure difference is generated, kinetic energy accumulated in the compression process is released onto the piston rod 8 by the disc spring 3, and the kinetic energy is transmitted to the shell 8 through the piston rod 8.
The periodic mechanical vibration module mainly utilizes the opening and closing of the pressure control valve to generate pressure difference, and drives a mechanical structure to generate periodic vibration under the action of the pressure difference, and the specific principle is shown in fig. 7. The well fluid enters the hydraulic cylinder 2 from the pressure inlet hole 5, the pressure in the hydraulic cylinder 2 continuously rises along with the continuous inflow of the fluid, the piston is pushed to move upwards, the disc spring 3 is compressed, and when the spring is compressed to the limit position, the stored energy is the largest. When fluid pressure reaches the pressure relief pressure threshold of the pressure control valve 6, the pressure control valve 6 is opened, fluid in a well flows out of the pressure control valve 6, the pressure in the hydraulic cylinder 2 suddenly drops, the disc spring 3 starts to release stored energy to act on the piston 4 and the piston rod 8 and convert the energy into kinetic energy of the piston rod 8, and the piston rod 8 impacts the shell 9 to generate axial impact. After the pressure control valve 6 releases the pressure in the hydraulic cylinder 2, after the piston rod 8 finishes one-time impact, one working cycle is finished, at the moment, the pressure inlet hole 5 enters fluid, the next working cycle is repeated, and periodic continuous axial impact is generated.
(3) Non-periodic fluid vibration module
The aperiodic fluid vibration module mainly comprises an attached wall vibration chamber and a vortex street vibration chamber. The two vibration chambers are designed by innovatively utilizing the wall attachment vibration effect and the Karman vortex street vibration effect in fluid mechanics, and coupled vibration is generated through the two fluid vibration chambers.
The coanda vibration chamber is mainly designed according to the coanda effect principle in fluid mechanics, because the curvature of the surface of the shell 12 of the coanda vibration chamber is constantly changed, when fluid flows through the designed coanda effect vibration chamber, the fluid is attached to the surface of the chamber and flows, when the fluid flows through the curvature change position, the speed and the direction of the fluid can be changed, the curvature of the surface of the chamber is constantly changed, the speed of the fluid can be constantly changed, and continuous vibration is induced; in addition, the bionic volute 13 is in a conical structure in the design of the coanda vibration chamber, so that the pressure of fluid flowing through the chamber can be changed, and the vibration generated by the coanda effect is more obvious.
The vortex street vibration chamber is mainly designed according to the karman vortex street principle in hydrodynamics, when fluid in a well bypasses the vortex street induction cylinder 10, two sides of the vortex street induction cylinder 10 can periodically fall off double-row line vortexes with opposite rotation directions and regular arrangement, and after nonlinear action, the karman vortex street is formed. When fluid flows through the vortex street inducing cylinder, vortex is generated non-periodically and falls off, so that non-periodic axial vibration is excited, and the vibration is transmitted to the drag reducer shell to achieve the aim of drag reduction.
(4) Principle of non-periodic coupled vibration
The mechanism capable of generating and inducing structural vibration of the aperiodic coupling hydraulic vibration inducing type coiled tubing damping device mainly comprises a periodic mechanical vibration module, an attached wall vibration chamber and a vortex street vibration chamber.
The periodic mechanical vibration module mainly depends on a mechanical mechanism to generate periodic axial vibration. The 'coanda vibrating chamber' mainly depends on axial vibration and weak radial vibration generated by the action of fluid on the inner surface of the coanda effect vibrating chamber with the change of curvature. The vortex street vibration chamber mainly utilizes the Karman vortex street effect to generate vortex and the pressure change when the vortex falls off to excite axial vibration and radial vibration.
The aperiodic coupling hydraulic induced vibration type coiled tubing damping device has three levels of coupling vibration: the coupling of the axial vibration generated by the periodic mechanical vibration module and the axial vibration generated by the non-periodic fluid vibration chamber is the main power for the resistance reduction of the resistance reducer; the coupling of the radial vibration excited by the coanda vibration chamber and the radial vibration excited by the vortex street vibration chamber is the auxiliary power for the resistance reduction of the resistance reducer; the coupling effect of the axial vibration and the radial vibration of the resistance reducer is the comprehensive reflection of the resistance reducing effect of the resistance reducer.
Claims (9)
1. The aperiodic coupling hydraulic induced vibration type coiled tubing drag reduction device is characterized by comprising an upper joint (1), a periodic mechanical vibration module, a non-periodic fluid vibration module and a lower joint (16);
the upper joint (1) is connected with one end of the hydraulic cylinder (2) through conical threads, the other end of the hydraulic cylinder (2) is connected with one end of the sealing base (7) through pipe threads, the other end of the sealing base (7) is connected with one end of the outer shell (9) of the vortex street vibration chamber through threads, the other end of the outer shell (9) of the vortex street vibration chamber is connected with one end of the outer shell (12) of the attached wall vibration chamber through conical threads, and the other end of the outer shell (12) of the attached wall vibration chamber is connected with the lower joint (16) through conical threads.
2. An aperiodic coupling hydraulic vibration-inducing type coiled tubing drag-reducing device according to claim 1, wherein the periodic mechanical vibration module comprises a hydraulic cylinder (2), the hydraulic cylinder (2) is hollow inside, a piston (4) is arranged in an annular space inside the hydraulic cylinder (2), the piston (4) is in interference fit with the inner wall of the hydraulic cylinder (2) and is sealed through an O-shaped sealing ring, two pressure control valves (6) and four pressure inlet holes (5) are arranged on the inner wall of the hydraulic cylinder (2), the pressure control valves (6) are welded on the inner wall of the hydraulic cylinder (2), two ends of a sealing base (7) are threaded, an annular through groove allowing a piston rod (8) to pass through is arranged on the sealing base (7), and the O-shaped sealing ring is arranged.
3. An aperiodic coupled hydraulic vibration-inducing coiled tubing drag reduction device according to claim 2, characterized in that the pressure control valve (6) comprises a cone (17), a disc spring (18) and a valve body (19), the cone (17) and the conical groove of the valve body (19) are assembled by clearance fit, and the disc spring (18) is placed in the cylindrical groove of the valve body (19).
4. The non-periodically coupled hydraulic induced vibration coiled tubing drag reduction device of claim 1, wherein the non-periodic fluid vibration module comprises a coanda vibration chamber and a vortex street vibration chamber.
5. The aperiodic coupling hydraulic induced vibration type coiled tubing damping device according to claim 4, wherein the vortex street vibration chamber comprises three vortex street excitation cylinders (10) and a hollow shaft (11), the three vortex street excitation cylinders (10) are fixed on the hollow shaft (11) in an interference fit and cementing manner, and the hollow shaft (11) and the vortex street excitation cylinders (10) are suspended and are placed in the outer shell (9) of the vortex street vibration chamber without constraint.
6. An aperiodic coupled hydraulic induced vibration coiled tubing drag reduction device according to claim 5, characterized in that the vortex street excitation cylinder (10) is made of a cylindrical rubber rod with dimensions close to the inner diameter of the outer shell (9) of the vortex street vibration chamber.
7. The aperiodic coupled hydraulic induced vibration coiled tubing fairing as recited in claim 4, wherein the coanda vibration chamber comprises a bionic volute (13) and a shaft (15), the bionic volute (13) is fixed on the shaft (15) by gluing, and the shaft (15) is fixedly constrained at both ends by hollow supports (14).
8. An aperiodic coupled hydraulic vibration-inducing coiled tubing drag reduction device as recited in claim 7, wherein said bionic volute (13) is made of rubber and has a conical structure.
9. An aperiodic coupled hydraulic induced vibration coiled tubing drag reduction device according to claim 7, characterized in that the hollow support (14) is provided with a circular hole in the middle, the shaft (15) passes through the hole, and circular holes are arranged around the hole at equal intervals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921653098.5U CN210564366U (en) | 2019-09-30 | 2019-09-30 | Aperiodic coupling hydraulic induced vibration type coiled tubing resistance reducing device |
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| CN201921653098.5U CN210564366U (en) | 2019-09-30 | 2019-09-30 | Aperiodic coupling hydraulic induced vibration type coiled tubing resistance reducing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485928A (en) * | 2019-09-30 | 2019-11-22 | 西安石油大学 | Aperiodicity coupling waterpower lures vibration formula coiled tubing resistance absorber |
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2019
- 2019-09-30 CN CN201921653098.5U patent/CN210564366U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485928A (en) * | 2019-09-30 | 2019-11-22 | 西安石油大学 | Aperiodicity coupling waterpower lures vibration formula coiled tubing resistance absorber |
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