Impeller type axial and circumferential compound impactor

Abstract

The invention provides an impeller type axial and circumferential compound impactor. The impeller type axial and circumferential compound impactor comprises a conversion adapter, a motor assembly andan impact assembly. The front end of the motor assembly is connected with the impact assembly; the rear end of the motor assembly is connected with the conversion adapter; liquid energy is converted into rotating mechanical energy through an impeller of the motor assembly so that a rotating valve of the impact assembly is driven to rotate; holes are formed in the rotating valve and a valve cover,so that drilling liquid enters a hammer head and a hammer body cylinder cavity periodically; the hammer head impacts a hammer body cylinder to produce circumferential vibration under the pushing of the liquid; meanwhile, axial holes of the rotating valve and the valve cover are staggered periodically to change the pressure of the liquid, so that high-frequency axial vibration is produced; axial and circumferential impact force is transferred to a drilling bit through a lower connector, a stick slip phenomenon is eliminated, and the drilling bit is protected, so that the rock breaking efficiency of the drilling bit is improved. According to the impeller type axial and circumferential compound impactor disclosed by the invention, axial and circumferential impact is produced by utilizing thedrilling liquid, so that the drilling efficiency can be effectively improved.

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 driller’s delivery is not timely or too fast, or due to the friction of the well wall, resulting in the application of 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 drills 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 limit is high. When drilling with conventional roller cone bits, the footage of a single bit is small, and multiple trips are required and the ROP is low. The life of the screw is relatively high, the life of the screw is low, and the use effect is not ideal; in addition, drilling with gas drilling technology can greatly increase the ROP, but it is easy to cause complex situations downhole when the formation is watery, and there are many supporting equipment for gas drilling. relatively large cost

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