Impeller type axial and circumferential compound impactor

Abstract

The invention provides an impeller type axial and circumferential compound impactor, which includes a conversion joint, a motor assembly and an impact assembly. The front end of the motor assembly is connected to the impact assembly, and the rear end is connected to the conversion joint. The impeller of the motor assembly converts the liquid energy into rotational mechanical energy, thereby driving the rotary valve of the impact assembly to rotate. There are holes, so that the drilling fluid periodically enters the hammer head and the hammer body barrel cavity, and the hammer head periodically hits the hammer body barrel under the push of the liquid to produce circumferential shocks, and at the same time, the axial holes of the rotary valve and the valve cover are periodically dislocated. Change the liquid pressure to generate high-frequency axial vibration, and transmit the axial and circumferential impact force to the drill bit through the lower joint to eliminate the stick-slip phenomenon, protect the drill bit, and improve the rock-breaking efficiency of the drill bit. The impeller-type axial and circumferential composite impactor of the present invention uses drilling fluid to generate two impacts, axial and circumferential, and can effectively improve drilling efficiency.

Description

technical field [0001] The invention relates to a downhole tool used for oil drilling, in particular to an impeller type axial and circumferential compound impactor. Background technique [0002] In conventional oil well drilling, PDC drill bits are widely used. In field operation, due to the driller’s technical and experience problems, the drilling is not timely or too fast, or due to the friction of the well wall. The WOB to the drill bit is unstable, which affects the rock breaking efficiency, and may even damage the drill bit or crack the cutting teeth of the drill bit due to the sudden increase of the WOB, affecting the drilling speed. On the other hand, when the PDC drill bit is drilling hard or abrasive formations, it usually does not have enough torque to break the rock, resulting in the phenomenon of pipe sticking, and the torque release of the downhole drill pipe causes the drill bit to fail. The rock in the deep formation of the oil field is hard and the grinding...

AI Technical Summary

Problems solved by technology

[0002] In conventional oil well drilling, PDC drill bits are widely used. In field operation, due to the driller’s technical and experience problems, the drilling is not timely or too fast, or due to the friction of the well wall. The drilling pressure to the drill bit is unstable, which affects the rock breaking efficiency, and may even damage the drill bit or crack the cutting teeth of the drill bit due to the sudden increase of the drilling pressure, which affects the drilling speed

On the other hand, when the PDC drill bit is drilling hard or abrasive formations, it usually does not have enough torque to break the rock, resulting in the phenomenon of pipe sticki

Images