Threaded rod type double-acting acceleration tool

Abstract

The invention provides a threaded rod type double-acting acceleration tool. The threaded rod type double-acting acceleration tool comprises a power assembly, a universal shaft assembly, a transmissionassembly and an impact assembly, wherein the power assembly converts liquid energy into rotary mechanical energy through a screw rod; so that a rotating valve of the impact assembly is driven by theuniversal shaft assembly and the transmission assembly to rotate; because holes are formed in the rotating valve and a valve cover, drilling fluid periodically enters into a hammer head and a cylindercavity of a hammer body, and the hammer head periodically impacts the hammer body cylinder under the pushing of liquid so as to generate circumferential shocking; meanwhile, axial holes of the rotating valve and the valve cover are periodically staggered to ensure that liquid pressure is changed, and high-frequency axial shocking is produced; axial and circumferential impact force is transmittedto a drilling head through a lower joint, so that the stick-slip phenomenon is eliminated and a drilling bit is protected, thereby improving the rock breaking efficiency of the drilling bit. Accordingto the threaded rod type double-acting acceleration tool disclosed by the invention, axial impact and circumferential impact are produced under the driving of the drilling fluid, so that the well drilling efficiency can be effectively improved.

Description

technical field [0001] The invention relates to a downhole tool used for oil drilling, in particular to a screw-type double-acting speed-increasing tool. 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 limit is hi...

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. Conventional roller cone bits are used for drilling. The footage of a single bit is small, and multiple trips are required and the ROP is low.

In addition, drilling with gas drilling technology can greatly increase the ROP, but it is easy to cause complex downhole situations in the case of formation water, and there are many supporting equipment for gas drilling, and the cost is relatively high

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