A new overhung pulse generator

By using the conical fit between the large mushroom head and the flow-limiting ring, and the elastic reset mechanism of the floating piston, the problems of high flow channel occupancy, stringent cleanliness requirements, and complex structure of the upper-suspended pulse generator are solved, achieving stable and reliable pressure pulse generation and low-cost drilling operations.

CN122407170APending Publication Date: 2026-07-17BEIJING TUOERFENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING TUOERFENG TECH CO LTD
Filing Date
2026-06-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing top-suspended pulse generators suffer from problems such as high flow channel occupancy, stringent requirements for mud cleanliness, complex structure, and high maintenance costs.

Method used

It adopts a conical structure with a large mushroom head and a flow-limiting ring, combined with an elastic reset mechanism of a floating piston and a compression spring. It utilizes the impact and elastic force of drilling fluid to drive the rapid adjustment of the mud flow channel area and the generation of stable pressure pulses, eliminating the need for hydraulic transmission or rotary blade drive.

Benefits of technology

The simplified drive structure reduces energy consumption, improves operational reliability, reduces failure rate and maintenance costs, expands mud adaptability, and meets the stability and durability requirements of high-temperature and high-pressure drilling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a novel upper suspension pulse generator, which comprises a shell, a large mushroom head, a small mushroom head, a floating piston and a driving assembly. The inner side of the shell is provided with the floating piston, the floating piston divides the inner side of the shell into an upper space and a lower space, the large mushroom head is arranged in the upper space of the shell, and the driving assembly and the small mushroom head are arranged in the lower space of the shell. The inner cavity of the shell is provided with a mud flow channel extending in the axial direction, the inner side of the upper space of the shell is fixedly installed with a flow limiting ring, the flow limiting ring is arranged at the bottom of the large mushroom head, and the inner side of the lower space of the shell is provided with a piston cavity in communication with the floating piston. The application is provided with a taper surface matching structure formed by the large mushroom head and the flow limiting ring, the large mushroom head is assembled above the flow limiting ring, the impact force of the drilling fluid from top to bottom is used to push the large mushroom head to move downward to reduce the flow gap, the quick adjustment of the area of the mud flow channel is realized, and the effect that stable pressure pulses can be generated without hydraulic transmission or rotating blades is achieved.
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