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Oscillating jet type pressure pulse generating device

A technology of pressure pulse and generating device, which is applied in the direction of vibration generating device, drilling with vibration, wellbore/well components, etc. It can solve the problems of many vulnerable parts, limited service life, complex structure, etc., and achieve easy processing and manufacturing. Simple, easy to adjust frequency and fluctuation range

Active Publication Date: 2021-12-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an oscillating jet pressure pulse generating device, the purpose of which is to solve the problems of complex structures, many vulnerable parts and limited service life of existing various pressure pulse generating devices

Method used

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  • Oscillating jet type pressure pulse generating device
  • Oscillating jet type pressure pulse generating device
  • Oscillating jet type pressure pulse generating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1 to Figure 4 As shown, the embodiment of the present invention provides an oscillating jet pressure pulse generator, including: outer tube II, upper joint I, lower joint IV and vortex jet oscillator III, the upper joint I and lower joint IV The central fluid channel 1 of the upper joint and the central fluid channel 2 of the lower joint are respectively opened, and the two ends of the outer pipe II are respectively connected with the upper joint I and the lower joint IV through threads, and the vortex jet oscillator III is set at In the outer tube II, the two ends of the vortex jet oscillator III are connected to the upper joint I and the lower joint IV respectively, and the upper end of the vortex jet oscillator III is in contact with the upper joint I and passed through The sealing ring is sealed, the lower end of the vortex jet oscillator III is in contact with the lower joint IV and pressed tightly; the vortex jet oscillator III is provided with a j...

Embodiment 2

[0042] The structure of this embodiment is similar to that of Embodiment 1, the difference is that the special-shaped guide block 13, the second vortex cavity 14 and the second vortex cavity outlet 15 are added. In this embodiment, the fluid channel of the vortex jet oscillator III is set as follows Image 6 shown.

[0043] Compared with Embodiment 1, the vortex jet oscillator III of this embodiment adds a special-shaped guide block 13 and a second vortex chamber 14 sequentially below the vortex chamber 7, and the special-shaped guide block 13 will be connected with the substrate V and The cover plate VI forms a second left control channel 16a and a second right control channel 16b; a second vortex chamber outlet 15 is additionally added on the base plate V and the cover plate VI; as an improvement of this embodiment, the vortex chamber 7 and In the second vortex chamber 14 , an outlet of the vortex chamber can be re-set in at least one cavity to communicate with the emptying ...

Embodiment 3

[0047] The working principle of this embodiment is basically the same as that of the vortex jet oscillator III in Embodiment 2. Such as Figure 7 As shown, compared with Embodiment 2, the difference of this embodiment is that the shape of the special-shaped guide block 13 is changed, and a central control channel 17 is added on the special-shaped guide block 13, and the central control channel 17 communicates with The pressure waveform of the vortex chamber 7 and the second vortex chamber 14 in Embodiment 3 is as follows Figure 8 shown. According to different usage conditions, the outlet of the vortex chamber can also be selectively provided at the position of the vortex chamber 7 according to the actual situation. The vortex type oscillating jet pressure pulse generating device provided in this embodiment has the characteristics of low frequency and long pressure duration near the peak value, can form a nearly trapezoidal pressure pulse waveform, and has a high utilization...

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PUM

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Abstract

The invention provides an oscillating jet type pressure pulse generating device which comprises an upper connector and a lower connector, wherein the upper connector and the lower connector are provided with an upper connector center fluid channel and a lower connector center fluid channel respectively, and two ends of an outer pipe are connected with the upper connector and the lower connector through threads respectively. The vortex type jet flow oscillator is arranged in the outer pipe and is in butt joint with the upper connector and the lower connector. The vortex type jet flow oscillator is provided with a jet flow oscillator inlet and connected with a jet flow oscillation cavity, two flow guide blocks are arranged below the jet flow oscillation cavity, vortex cavity inlets are formed in the inner sides of the two flow guide blocks, control channels are arranged on the outer sides of the two flow guide blocks, and vortex cavities are arranged below the vortex cavity inlets. The vortex cavity is provided with a vortex cavity outlet communicated with the lower connector center fluid channel. The structure is simple, no extra mechanism is needed, and periodic pressure fluctuation can be generated through self-excitation only by means of the arrangement of an internal fluid channel; no movable part is arranged, it is convenient to process and manufacture, and firmness and durability are achieved.

Description

technical field [0001] The invention relates to the technical field of construction tools in drilling, in particular to an oscillating jet pressure pulse generating device. Background technique [0002] Because of its safety, reliability and high efficiency, coiled tubing operations have been involved in all conventional and unconventional tubing operations. However, during the drilling process of horizontal wells or directional wells, coiled tubing drilling tools have serious dragging pressure, especially in the wellbore with large curvature or long horizontal section, which will generate large friction and cannot provide sufficient drilling pressure. Large frictional resistance and difficult transmission of drilling pressure not only lead to low drilling efficiency, but also easily cause complex downhole accidents such as sticking. In response to these problems, adding pressure pulse oscillation drag reduction tools to downhole drilling tools is an effective measure commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/24E21B28/00
CPCE21B7/24E21B28/00F15B21/12E21B31/005B01F23/2366B01F31/81B01F23/2373B01F23/238F15C1/22
Inventor 张鑫鑫吴章辉张绍和谭静强孙平贺吴冬宇
Owner CENT SOUTH UNIV
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