Underground water-hammer type pressure pulse generating tool

A technology of pressure pulse and water hammer, applied in drilling with liquid/gas jets, etc., can solve the problems of limited amplitude and frequency characteristics of hydraulic waves, limited amplitude and frequency characteristics, and no large-scale application, etc. The amplitude is adjustable, the drilling speed is improved, and the structure is simple.

CN101936135AInactive Publication Date: 2011-01-05CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-01-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a water-hammer type pressure pulse generating nipple comprising an external structure and an internal structure, wherein the external structure comprises an outer cylinder, an upper joint and a lower joint; and the internal structure comprises a flow guiding body, a valve wheel subassembly, a normally-open flow passage, a nozzle and two valve-control flow passages, wherein the flow guiding body is arranged at the upper end of the valve wheel subassembly, the valve wheel subassembly is arranged at the upper ends of the normally-open flow passage and the valve-control flow passages, the valve-control flow passages are periodically opened and closed through the valve wheel subassembly and are connected with the normally-open flow passage in parallel, and the nozzle is arranged at the lower end of the normally-open flow passage. In the invention, the valve-control flow passages are opened and closed by periodically rotating the valve wheels to generate water-hammer type pressure pulses.
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Description

technical field

[0001] The invention relates to the technical field of drilling in the petroleum industry, in particular to a water hammer pressure pulse generating tool. Background technique

[0002] Hydraulic pulse drilling is to use the hydraulic pulse generator installed at the bottom of the well to generate pressure pulse waves at the bottom of the well. The pressure pulse wave acts on the bottom of the well to help remove cuttings at the bottom of the well, form an instantaneous negative pressure at the bottom of the well, and increase the drilling speed. In principle, the hydraulic pulse generating device is divided into the following two types: hydraulic oscillation type and throttling type.

[0003] The hydraulic oscillating pressure wave generator generates pressure vibrations in the oscillating chamber through the structure of the fluid oscillating chamber. After the pressure vibration is amplified in the chamber, it is released through the outlet of the hydraulic...

Examples

Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] Among them, the "upper and lower" mentioned in this article are for figure 1 and figure 2 In terms of the positional relationship shown.

[0026] Such as figure 1 , Figures 1A-1C , figure 2 and Figure 2A-2B As shown, the water hammer pressure pulse generating device proposed by the present invention includes an outer cylinder 1, a guide body 2, a normally open flow channel 3, two valve control flow channels 4 and 5, and a valve Wheel assembly ...