Vibration and pressure well drilling tool

Abstract

The invention discloses a vibration and pressure well drilling tool. An upper connector and a nozzle are arranged at the upper end of a sleeve; a driving rod is arranged at the lower end of the sleeve in a sliding manner; the lower end of the driving rod is fixedly connected with a lower connector; a plurality of stages of piston separation ring structures are arranged between the nozzle and the driving rod in the sleeve; each stage of piston separation ring structure comprises a piston approximately in a T-shaped structure, and a separation ring fixedly arranged in the sleeve and sleeved at a guide rod part of each piston; piston pressure transmitting holes communicated with a piston runner are arranged at the lower ends of the guide rod parts of the pistons; radial separation ring holes and axial separation ring holes are arranged in the separation rings; and sleeve flow guide holes are arranged in the sleeve, corresponding to the radial separation ring holes. According to the invention, shock vibration is innovatively introduced for ''stick-slip'' vibration of a drill bit, so that the stick-slip in the drilling process of the PDC (polycrystalline diamond compact) drill bit is eliminated, the PDC drill bit exerts a high-frequency and low-amplitude shock effect on the rock below, the stress status of the rock is improved, and the rock breaking efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of supporting devices for oil and natural gas drilling, in particular to a vibration pressurized drilling tool. Background technique [0002] PDC drill bit (English abbreviation for Polycrystalline Diamond Compact, polycrystalline diamond compact drill bit) is an efficient rock-breaking tool with fast drilling speed, long service life and good working stability. However, with the advancement of oil exploration and development to deep formations , the increase in hard formations, complex formations, and the complexity of drill tool structures has accelerated the damage and failure of the PDC bit, and the "stick-slip" vibration of the drill string (that is, the continuous accumulation and instantaneous release of the drill string torque) is the cause of the PDC The main cause of drill bit failure; conventional measures to eliminate the "stick-slip" vibration of PDC drill bits mainly include: increasing the dri...

AI Technical Summary

Problems solved by technology

[0002] PDC drill bit (English abbreviation for Polycrystalline Diamond Compact, polycrystalline diamond compact drill bit) is an efficient rock-breaking tool with fast drilling speed, long service life and good working stability. However, with the advancement of oil exploration and development to deep formations , the increase in hard formations, complex formations, and the complexity of drill tool structures has accelerated the damage and failure of the PDC bit, and the "stick-slip" vibration of the drill string (that is, the continuous accumulation and instantaneous release of the drill string torque) is the cause of the PDC The main cause of drill bit failure; conventional measures to eliminate the "stick-slip" vibration of PDC drill bits mainly include: increasing the drill string speed, optimizing the drill tool structure, increasing drilling fluid damping and top torque negative feedback, etc., but the above technical measures all exist Certain limitations, it is difficult to fundamentally solve the problem

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