Downhole hollow type annular impulse generation nipple

Abstract

The invention discloses a downhole hollow type annular impulse generation nipple. An upper joint and a lower joint are in threaded connection at the upper and lower ends of a housing, a central tube is fixed in the housing, the upper joint and the lower joint are of the same structure, and each of the upper joint and the lower joint is provided with a through hole along the central axis and provided with multiple groups of side holes in the direction forming a certain angle with the central axis, so that a through hole with a certain diameter is formed in the upper joint, the central tube and the lower joint along the central axis; an external extension part is arranged at the middle-upper part of the central tube, and the section of the external extension part adopts fixed blades provided with multiple groups of fan-shaped channels, a turbine assembly is mounted on the central tube below the external extension part of the central tube, and blades of the turbine assembly can rotate around the central tube. The downhole hollow type annular impulse generation nipple is simple in structure and convenient to process, periodic pressure impulse produced by the nipple provides power for various drilling speed increasing tools such as a hydroscillator, a hydraulic impactor and the like, the though hole is formed in the nipple along the central axis, so that tools and auxiliary accessories with certain outer diameters can pass through, and the nipple has the characteristics of stable performance and wide application range.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a downhole hollow annular pulse generator sub-joint. Background technique [0002] With the increasing difficulty of oil and gas exploration and development, the requirements for oil and gas well drilling equipment continue to increase. During the drilling process of deep wells and complex structure wells, downhole speed-up tools can greatly increase the drilling speed of drilling machines and reduce drilling costs. Under the action of drilling fluid, the hydraulic pulse nipple produces periodic hydraulic pulses. It is an important part of various drilling speed-increasing tools such as hydraulic oscillators and hydraulic impactors, providing power for them. [0003] The existing hydraulic pulse sub joints rely on the rotation of the helical rotor to cause the periodic change of the valve to generate pressure pulses, which have high requirements for processing techno...

AI Technical Summary

Problems solved by technology

[0003] The existing hydraulic pulse sub joints rely on the rotation of the helical rotor to cause the periodic change of the valve to generate pressure pulses, which have high requirements for processing technology and material selection, and the internal pulse sub joints cannot be provided with through holes. When the downhole operating conditions change, such as sudden well When it is necessary to add large particles of plugging materials or throw a ball to open the downhole plugging valve while drilling, and the downhole measuring instrument needs to use cables, it cannot meet the production requirements, which limits the scope of use of drilling speed-increasing tools

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