High-efficiency anti-depressurization rotating impact screw drilling tool

Abstract

The invention relates to the technical field of oilfield drilling equipment, in particular to a high-efficiency anti-depressurization rotating impact screw drilling tool. The high-efficiency anti-depressurization rotating impact screw drilling tool comprises a drill rod internally provided with a transmission shaft and a drill bit, the tail end of the drill bit is assembled on the bottom end of the transmission shaft through a drill bit connecting body; a rotary hammering device is assembled in the lower end of the transmission shaft, and the rotary hammering device is located between the bottom port of the inner hole of the transmission shaft and the tail port of the drill bit connecting body; and the rotary hammering device comprises a hammer body and a rotating sleeve body. The high-efficiency anti-depressurization rotating impact screw drilling tool provided by the invention not only eliminates one or more vibration phenomena that may occur when the drill bit moves underground, butalso keeps the torque of the whole drill string stable and balanced, and skillfully converts the fluid energy of the drilling fluid into a twisted, high frequency, uniform and stable mechanical impact energy and directly transmit to the PDC drill bit, so the drill bit and a shaft bottom can keep well continuous; moreover, the mechanical drilling speed is increased greatly, the stick-slip phenomenon is eliminated well and the life of the drill bit and other drills is prolonged.

Description

technical field [0001] The invention relates to the technical field of oil field drilling equipment, in particular to a high-efficiency anti-pressure depressurization rotary impact screw drilling tool. Background technique [0002] Downhole, the movement of the PDC bit is extremely disordered, including lateral, longitudinal, and torsional vibrations and combinations of these types of vibrations, and downhole vibration can damage a single PDC cutter, resulting in reduced life of the bit and irregular wells eye, reducing the wellbore quality. In addition, the stick-slip phenomenon will also lead to the early damage of the PDC drill bit. Specifically, when the drill bit is just drilled into the formation, the torque is insufficient, the drill bit will temporarily stop, the drill bit is suspended, and the turntable is rotating, then the energy of the torque is accumulated. On the entire drill pipe, the drill pipe is in a twisted state. When the torsional stress on the drill pi...

AI Technical Summary

Problems solved by technology

[0002] Downhole, the movement of the PDC bit is extremely disordered, including lateral, longitudinal, and torsional vibrations and combinations of these types of vibrations, and downhole vibration can damage a single PDC cutter, resulting in reduced life of the bit and irregular wells eye, reducing wellbore quality

In addition, the stick-slip phenomenon will also lead to the early damage of the PDC drill bit. Specifically, when the drill bit is just drilled into the formation, the torque is insufficient, the drill bit will temporarily stop, the drill bit is suspended, and the turntable is rotating, then the energy of the torque is accumulated. On the entire drill pipe, the drill pipe is in a twisted state. When the torsional stress on the drill pipe is suddenly released, the drill bit suddenly accelerates, and the drill bit rotates suddenly, which is easy to cause damage to the drill bit.

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