A three-dimensional vibration hydraulic oscillator

Abstract

The invention relates to a three-dimensional vibration hydraulic oscillator, which belongs to the technical field of oil exploitation equipment. The oscillator comprises a central pipe, an upper connector, a lower connector, a turbine main shaft, a rotor shaft and an adjusting connector. The upper connector is arranged on one end of the central pipe; the lower connector is arranged on the other end of the central pipe; the turbine main shaft is arranged in the central pipe through an alignment bearing A and an alignment bearing B which are arranged symmetrically; a thrust bearing is arranged on the turbine main shaft at one side of the alignment bearing B; a shunting sleeve and a current-limiting sleeve are arranged on the turbine main shaft at one side of the thrust bearing. The oscillator can enable a pipe column to produce high-frequency radial and axial vibration, and change static friction to kinetic friction, so that the frictional coefficient of an outer wall of the pipe column and a well wall is effectively reduced, effective bit-weight can be acquired at a drill part, and the problem of fake pressurization caused by gravity force component, buoyancy force and frictional force in the pressurization of a horizontal well and a highly-deviated well can be solved.

Description

technical field [0001] The invention relates to a three-dimensional vibration hydraulic oscillator, which belongs to the technical field of petroleum exploitation equipment. Background technique [0002] With the increasing number of complex wells such as highly deviated wells, horizontal wells and horizontal lateral wells developed in major oilfields in my country, how to effectively apply WOB to the drill bit has become a common concern. At present, there are two main ways of drilling: compound drilling and sliding drilling with downhole power drilling tools. Due to the complex structure of these wells, the hydraulic loss increases along the way, and the available water horsepower of the bottom hole bit is quite low. Generally, the weight of the drill string is applied to the drill bit to break the rock. However, in the drilling construction of deviated wells, horizontal wells and horizontal wells, these traditional pressurization methods are subject to certain limitation...

AI Technical Summary

Problems solved by technology

However, in the drilling construction of deviated wells, horizontal wells and horizontal wells, these traditional pressurization methods are subject to certain limitations. The main problem is: due to the large well deviation, the weight of the drill string itself in the empirical direction In horizontal wells, due to the large positive pressure of the drill string on the well wall, the friction of the drilling tool on the well wall is increased, thus restricting the effective application of the drill bit. WOB; as the horizontal section of the construction is getting longer and longer, however, in the construction process of the section with large well deviation, underpressure and sticking often occur; for compound drilling, especially when the downhole power drilling tool slides During the drilling process, it is impossible to ensure that the real and effective WOB is applied to the drill bit, which seriously affects the average ROP of the whole well and the drilling cycle

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