Torsional impact drilling acceleration tool

Abstract

The invention discloses a torsional impact drilling acceleration tool, which consists of a shell, a seat body, a flow guide unit, an impact unit and an anti-drop unit. A male buckle connected with a drill collar is arranged at the upper end of the tool. A female buckle connected with a drill bit is arranged at the lower end of the tool. The shell is connected with the seat body through splines. When the tool works, torque and bit pressure are transmitted through the splines. The flow guide unit comprises a sealing cover, a desanding sleeve and a screen pipe. A lateral passage for the upward return of fluid and a step for placing the desanding sleeve are arranged at the upper end of the sealing cover. The impact unit comprises a positioning sleeve, an impact hammer and a bearing. The impact hammer is provided with two starting hammerheads and two impact hammerheads. The anti-drop unit comprises an anti-drop block, a bolt, a spring and anti-drop grooves. Low-amplitude high-frequency torsional impact can be provided for the drilling drill bit, and is used for retarding the stick-slip vibration of a lower drilling tool combination in a drilling process, so that mechanical drilling speed is increased, and failures of a drilling tool are reduced.

Description

technical field [0001] The invention relates to a drilling speed-increasing tool in oil and gas exploration and development, in particular a torsional impact drilling speed-increasing tool that slows down the stick-slip vibration of the lower drilling tool to improve the utilization rate of rock-breaking energy and reduce the failure of the drilling tool so as to increase the mechanical speed of penetration . Background technique [0002] With the substantial increase in the country's demand for oil and gas, the exploration and development of oil and gas has been continuously intensified. The number of deep wells and ultra-deep wells is increasing, and the difficulty of drilling is also increasing. Stick-slip vibration is a common and important factor that easily causes the failure of drilling tools and reduces the rate of penetration in the process of drilling deep and ultra-deep wells, especially when drilling deep hard formations. The existing axial rotary percussion dr...

AI Technical Summary

Problems solved by technology

[0003] The existing patent US6742609B2 uses a turbine-driven impact mechanism to form a high-frequency torsional impact that is directly transmitted to the drill bit. Patent CN101463709B uses a screw motor to drive the impact mechanism. Both tools can achieve the purpose of forming a high-frequency torsional impact, but their disadvantages are geometric structures Faster wear for the impact part of the ratchet

[0004] Patent 201010511421.1 adopts another structure to form high-frequency torsional impact. Its shortcomings mainly include: (1) The drilling fluid contains various additives and barite, etc. The tool is not equipped with a sand removal device, which may easily lead to The impact unit cannot operate normally; (2) The impact of a single impact hammer on the seat body is likely to aggravate the whirl behavior of the lower drilling tool, thereby affecting the quality of the wellbore; The installation and disassembly of the spherical connecting body of the body; the drill bit may be stuck during the drilling operation, and the connecting body needs to withstand tens of tons or even greater lifting force of the drill string, and its safety is low

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