Wall-attached bidirectional vibration coiled tubing drag reducer
By designing the main nozzle, side wall, feedback channel and arc-shaped groove structure in the drag reducer, the return and vortex flow are formed, and the problem of instability of periodic pressure difference in the prior art is solved, and the drag reduction effect and use are improved life.
Patent Information
- Application Number
- CN202420902988.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The existing shale gas development double-action coupled continuous oil pipe drag reducer in the long-term work. Because the interior of the upper vibration chamber and the lower vibration chamber are a single cavity, the extrusion effect is poor, and the stability of the wall effect is reduced, so it cannot be Achieve a more stable periodic pressure difference.
A wall-mounted bidirectional vibration continuous tube drag reducer is designed, by setting the main nozzle, side wall, feedback channel and shunt in the shell, and a pair of arc grooves are provided on the side of shunt near the main nozzle. , the groove depths are different, forming reflux and vortex current, improving the stability of the attached wall and the stability of the periodic pressure difference.
It effectively improves the drag reduction effect and service life of the drag reduction device, ensures a more stable periodic pressure difference, and enhances the stability of the wall-mounted effect and corrosion resistance.
Smart Images
Figure CN222276627U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drag reducer equipment, in particular to a wall-attached bidirectional vibrating continuous tube drag reducer. Background Art
[0002] Drag reducers are mainly used in deep horizontal drilling processes. Specifically, they are used to solve the application defects of continuous tubing, such as large friction force of tubing bending, difficult extension, insufficient power, and the problem that the hydraulic vibration tools that are feasible and commonly used on site are complex in structure and easy to damage. The invention patent with publication number CN108678674B publicly authorized the double-acting coupled continuous tubing drag reducer for shale gas development. It constructs a vibration coupling foundation in different directions by setting up a turbine power source, an upper vibration chamber and a lower vibration chamber, and uses bidirectional vibration to form a periodic pressure difference, which can enhance the drag reduction effect.
[0003] However, in the actual use of the above-mentioned shale gas development double-acting coupled coiled tubing drag reducer, since the interior of the upper vibration chamber and the lower vibration chamber is a single cavity, and the vortex shedding ball and the lower shell with a changing inner wall surface curvature form a wall attachment effect, this makes the upper vibration chamber and the lower vibration chamber have poor squeezing effect during long-term operation, thereby reducing the stability of the wall attachment effect, and ultimately failing to obtain a more stable periodic pressure difference. Utility Model Content
[0004] The utility model aims to overcome the above technical deficiencies, propose a wall-attached bidirectional vibrating coiled tube drag reducer, and solve the technical problem of unstable periodic pressure difference in the prior art.
[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:
[0006] In the first aspect, the utility model provides a wall-attached bidirectional oscillating continuous tube drag reducer, comprising a shell, a bidirectional oscillating element and a splitter; the bidirectional oscillating element is arranged in the shell, and the bidirectional oscillating element comprises a main nozzle, one side of the main nozzle is provided with a side wall and an output channel in sequence along the axial direction, the two sides of the side wall are provided with a feedback flow channel, and the feedback flow channel is connected to the side opposite to the side wall and the main nozzle; the splitter is provided with a pair of arc-shaped grooves on the side close to the main nozzle, and the groove depths of the two arc-shaped grooves are different.
[0007] In some embodiments, a guide section is connected between the main nozzle and the side wall.
[0008] In some embodiments, the length of the guide section is 2-3 times the width of the main nozzle.
[0009] In some embodiments, the arc-shaped groove has rounded corners at its notch.
[0010] In some embodiments, the side walls are arranged in pairs, and the sides of the two side walls away from the main nozzle are narrowed.
[0011] In some embodiments, the narrow opening of the side wall has an inclination angle of 11°.
[0012] In some embodiments, an upper connector is detachably connected to one side of the shell.
[0013] In some embodiments, the upper joint is connected to one side of the shell by a tapered thread.
[0014] In some embodiments, the bidirectional oscillation element is fixedly connected to the inner wall of the shell.
[0015] In some embodiments, the housing is tubular, and an axial length of the housing is greater than an axial length of the bidirectional oscillating element.
[0016] In a second aspect, the utility model also provides a wall-attached bidirectional vibration coiled tube drag reducer,
[0017] Compared with the prior art, the utility model provides a wall-attached bidirectional vibrating continuous tube drag reducer, which constructs a basic oscillation structure by arranging a main nozzle, a side wall and a feedback flow channel; further, a splitter is arranged and a pair of arc-shaped grooves are provided on the side of the splitter close to the main nozzle, and the groove depths of the two arc-shaped grooves are different, so that the splitter can form a backflow and a vortex under the impact of the jet, especially the two arc-shaped grooves can effectively improve the stability and service life of the wall, and can effectively improve the stability of the periodic pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a cross-sectional view of the internal structure of a wall-attached bidirectional vibrating coiled tube drag reducer provided by an embodiment of the utility model;
[0019] Figure 2 yes Figure 1 A magnified schematic diagram of center A.
[0020] Description of reference numerals:
[0021] 100, shell; 200, two-way oscillation element; 210, main nozzle; 220, side wall; 230, output channel; 240, feedback channel; 250, guide section; 300, splitter; 310, arc groove; 320, fillet; 400, upper joint. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0023] In order to solve the technical problem that the periodic pressure difference is not stable enough, the utility model provides a wall-attached bidirectional vibrating coiled tube drag reducer, which can provide a more stable periodic pressure difference.
[0024] It should be noted that the wall-attached bidirectional vibrating coiled tube drag reducer described in the utility model is used for but not limited to deep horizontal section drilling, etc. For the convenience of explanation, in the utility model, only the application of a wall-attached bidirectional vibrating coiled tube drag reducer to deep horizontal section drilling is used as an example for explanation, and the principle of applying a wall-attached bidirectional vibrating coiled tube drag reducer to other types of equipment is substantially the same as the principle of applying it to deep horizontal section drilling, which will not be described one by one here.
[0025] See also Figure 1 - Figure 2 ,in Figure 1 The present invention is a schematic structural diagram of a wall-attached bidirectional oscillating coiled tube drag reducer in one embodiment of the utility model. The wall-attached bidirectional oscillating coiled tube drag reducer comprises a shell 100, a bidirectional oscillating element 200 and a splitter 300; the bidirectional oscillating element 200 is arranged in the shell 100, and the bidirectional oscillating element 200 comprises a main nozzle 210, one side of the main nozzle 210 is provided with a side wall 220 and an output channel 230 in sequence along the axial direction, and feedback channels 240 are provided on opposite sides of the side wall 220, and the side of the feedback channel 240 opposite to the side wall 220 and the main nozzle 210 are connected to each other; a pair of arc-shaped grooves 310 are provided on the side of the splitter 300 close to the main nozzle 210, and the groove depths of the two arc-shaped grooves 310 are different.
[0026] In this embodiment, liquid is first introduced through one side of the housing 100 to form a jet; then, the jet enters the side wall 220 and the feedback channel 240 successively through the main nozzle 210. Due to the friction and viscosity of the side wall 220 and the entrainment effect of the jet, the pressure on both sides is reduced, and due to the turbulence and the complexity of the fluid flow, the entrainment amount of the liquid on both sides is different, which makes the pressure difference on both sides inconsistent. Under the effect of the pressure difference on both sides, the jet will be deflected and finally stably attached to the feedback channel 240 on one side. Since the bidirectional oscillation element 200 is provided, that is, there are oscillations in both the axial and radial directions, and a periodic pressure difference is generated after coupling, the drag reduction effect of the drag reducer is effectively improved; in particular, the design of a pair of arc-shaped grooves 310 of the splitter chopper 300 makes the splitter chopper 300 produce backflow and form a stronger vortex under the impact of the jet, and the vortex will produce a more stable squeezing effect on the main jet (i.e., the jet mentioned above), thereby improving the wall adhesion stability of the jet itself, and then ensuring the stability of the periodic pressure difference; in addition, due to the design of the double arc-shaped grooves 310 of the splitter chopper 300, it also has the effect of corrosion resistance and impact resistance, that is, the stability is indirectly improved by increasing the service life of the splitter chopper 300.
[0027] In one embodiment, see Figure 1 A guide section 250 is connected between the main nozzle 210 and the side wall 220 .
[0028] In this embodiment, the design of the flow guide section 250 helps to ensure the stability of the jet.
[0029] In one embodiment, see Figure 1 The length of the guide section 250 is 2-3 times the width of the main nozzle 210 .
[0030] In this embodiment, the length design of the guide section 250 can reduce the loss of water energy as much as possible while ensuring the stability of the jet.
[0031] In one embodiment, see Figure 1 - Figure 2 A rounded corner 320 is provided at the notch of the arc-shaped groove 310 .
[0032] In this embodiment, the design of the rounded corners 320 can increase the impact resistance and help to increase the service life of the splitter 300.
[0033] In one embodiment, see Figure 1 The side walls 220 are arranged in pairs, and the side of the side walls 220 away from the main nozzle 210 is narrowed.
[0034] In this embodiment, the two side walls 220 that are away from the main nozzle 210 are narrowed, which can help form a high-speed jet, thereby accelerating the jet rotation and forming a vortex.
[0035] In one embodiment, see Figure 1 The narrow opening of the side wall 220 has an inclination angle of 11°.
[0036] In this embodiment, the narrow opening of the side wall 220 has an inclination angle of 11°, so that the jet follows the angle of the side wall 220 and is shot at the inlet of the feedback channel 240 on this side and makes the liquid in the feedback channel 240 have a certain initial velocity.
[0037] In one embodiment, see Figure 1 An upper connector 400 is detachably connected to one side of the housing 100 .
[0038] In this embodiment, the upper connector 400 is used to deliver liquid into the housing 100 .
[0039] In one embodiment, see Figure 1 The upper connector 400 is connected to one side of the housing 100 by a tapered thread.
[0040] In this embodiment, the tapered thread connection method can make the upper connector 400 easy to disassemble and have a self-locking function.
[0041] In one embodiment, see Figure 1 The bidirectional oscillating element 200 is fixedly connected to the inner wall of the housing 100 .
[0042] In one embodiment, see Figure 1 The housing 100 is tubular, and the axial length of the housing 100 is greater than the axial length of the bidirectional oscillation element 200.
[0043] In order to better understand the present invention, the following Figure 1 to Figure 2 The technical solution of the utility model is described in detail:
[0044] First, the upper joint 400 is connected to the conical thread at one end of the shell 100; then, liquid is injected into the shell 100 through the upper joint 400; then, the liquid enters the side wall 220 and the feedback channel 240 through the main nozzle 210 and the guide section 250 in turn. Since the liquid forms a jet after passing through the guide section 250, the jet immediately forms a vortex under the action of the splitter 300 and the arc groove 310, and a small part of the jet will enter the single-sided feedback channel 240, and enter between the two side walls 220 again, and then impact the area between the guide section 250 and the side wall 220, forcing the jet to turn, thereby forming a periodic jet deflection. Due to the design of the splitter 300 and the two arc grooves 310, the turbine is formed and produces a stronger squeezing effect on the original jet, thereby improving the wall attachment stability of the jet, that is, it helps to obtain a more stable periodic pressure difference. It should be noted that the bidirectional oscillating element 200 mentioned above includes two axial and radial oscillating elements, which can be designed as an integrated unit or connected in sections. The only difference between the two axial and radial oscillating elements is that the opening shape of the output channel 230 is different.
[0045] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.
Claims
1. A wall-attached bidirectional vibrating coiled tube drag reducer, characterized in that: include: case; A two-way oscillating element, the two-way oscillating element is arranged in the housing, the two-way oscillating element comprises a main nozzle, one side of the main nozzle is provided with a side wall and an output channel in sequence along the axial direction, two opposite sides of the side wall are provided with feedback channels, and the feedback channel is connected to the side opposite to the side wall and the main nozzle; and A splitter chopper is provided with a pair of arc-shaped grooves on one side of the splitter chopper close to the main nozzle, and the groove depths of the two arc-shaped grooves are different.
2. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: A flow guide section is connected between the main nozzle and the side wall.
3. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 2, characterized in that: The length of the guide section is 2-3 times the width of the main nozzle.
4. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: The notch of the arc-shaped groove is provided with a rounded corner.
5. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: The side walls are arranged in pairs, and the sides of the two side walls away from the main nozzle are narrowed.
6. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 5, characterized in that: The narrow opening of the side wall has an inclination angle of 11°.
7. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: An upper joint is detachably connected to one side of the shell.
8. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 7, characterized in that: The upper joint is connected to one side of the shell by a tapered thread.
9. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: The bidirectional oscillating element is fixedly connected to the inner wall of the shell.
10. The wall-attached bidirectional vibrating coiled tube drag reducer according to claim 1, characterized in that: The shell is tubular, and the axial length of the shell is greater than the axial length of the bidirectional oscillating element.