Torsion impact device

Abstract

The invention discloses a torsion impact device, and belongs to the field of petroleum drilling and rock and soil drilling. The torsion impact device is consisted of a top joint, an outer tube, an inner tube impact assembly and a suspension device. The upper end of the top joint is connected with a drilling tool, and the lower end of the top joint is connected with the outer tube through a thread;the inner tube impact assembly is arranged in the outer tube; and the suspension device is positioned on the inner side of the lower end of the inner tube impact assembly and fix the inner tube impact assembly to the outer tube, the suspension device is constituted by assembling together a spring seat, springs, a suspension pin, a control limiting sleeve and a semicircle card which are arranged from top to bottom, and the inner tube impact assembly is constituted by assembling a flow assigning core tube, a filtering tube, a hammer body, a swing hammer, a rotary valve and a throttle nozzle. According to the torsion impact device, a valve control method is adopted to assign flow, and the swing hammer is driven to swing to output impact torque to a PDC drill pit. The torsion impact device has the characteristic of being high in adaptability and functional reliability, and the impact torque and the impact frequency of the torsion impact device are drastically improved, so that the drilling efficiency is improved.

Description

technical field [0001] The invention relates to a torsion impactor, which belongs to the fields of petroleum drilling and geotechnical drilling. Background technique [0002] The torsion impactor is a speed-increasing tool used to solve the stick-slip problem in the drilling of PDC bits. Currently, the most mature and effective torsion impactor is the valve-controlled torsion impactor, but this valve-controlled torsion impactor The torsional impactor also has the following problems. [0003] 1. There are high requirements for drilling flushing fluid, solid phase content and particle size in the flushing fluid, so the adaptability to flushing fluid is poor and there are certain limitations in use; [0004] 2. The structure is relatively complicated. The flushing liquid entering the impactor is divided into two parts, one way enters the working chamber of the pendulum, and the other enters the valve control system, so there are many flushing liquid channels, especially switch...

AI Technical Summary

Problems solved by technology

[0003] 1. There are high requirements for drilling flushing fluid, solid phase content and particle size in the flushing fluid, so the adaptability to flushing fluid is poor and there are certain limitations in use;

[0004] 2. The structure is relatively complicated. The flushing liquid entering the impactor is divided into two parts, one way enters the working chamber of the pendulum, and the other enters the valve control system, so there are many flushing liquid channels, especially switching channels, and the probability of jamming is high. It affects the reliability of the torsion impactor;

[0005] 3. Since the flushing liquid entering the valve control system directly flows out of the torsion impactor, this is equivalent to shunting the amount of flushing liquid entering the pendulum working chamber of the torsion impactor, which will affect the impact torque and impact frequency output by the torsion impactor. have a greater impact;

[0006] 4. At present, the torsion impactor lacks the function of air defense, and can only suspend its impact working state by stopping the pump, which will also have a certain impact on the working life of the torsion impactor;

[0007] 5. The outlet water channel of the torsion impactor is narrow, which will cause a certain pressure loss

Images