Shock absorption type pulse speed increaser and drill tool system

Abstract

The invention discloses a shock absorption type pulse speed increaser. The shock absorption type pulse speed increaser comprises a shell assembly, a bearing assembly, a pressure pulse mechanism and ashock absorbing and pressure stabilizing mechanism, and is characterized in that an upper transmission shaft in the pressure pulse mechanism rotates, but an adjusting disc is not moved through the fixation by the shell assembly, and the flow passing sectional area between an upper flow passing passage and a lower flow passing passage is periodically changed, so that the pressure energy of a drilling fluid flowing into an upper cavity is changed, the periodic axial pulsation impact force is generated, and the pulse rock breaking energy of a drill bit is increased; and when the drilling pressureis too large or insufficient, the axial shock of the drill bit is absorbed through the storage and release action of an elastic element in the shock absorbing and pressure stabilizing mechanism, andthe drilling pressure is maintained to be stable. According to the shock absorption type pulse speed increaser, through the connection with the power end of a screw drill tool or a turbine drill tool,the shock absorbing and pressure stabilizing function can be achieved, and the axial high-frequency pulsation impact energy can be generated, so that the purposes of improving the working environmentof the drill bit and increasing the rock breaking energy of the drill bit are achieved.

Description

technical field [0001] The invention relates to the technical fields of oil and gas exploration, geological exploration and geothermal well development, in particular to a shock-absorbing pulse speed booster. Background technique [0002] As oil and gas exploration and development expand toward deep and piedmont structural belts, igneous rock or glutenite formations are often encountered, and when drilling in such heterogeneous formations with high compressive strength, the outstanding performance is slow average ROP, The consumption of the drill bit is large, and the downhole drilling system often has the phenomenon of suffocating and skipping the drill, which may cause the drill bit to break and drop teeth, and the drill pipe may break and other problems. [0003] Nowadays, power drilling tools such as screw and turbine are widely used in the industry for speed-up operations due to their advantages such as high torque and high speed. But at the same time, on the one hand,...

AI Technical Summary

Problems solved by technology

But at the same time, on the one hand, there is no shock-absorbing mechanism inside the power drilling tools such as screw and turbine to stabilize the WOB fluctuation generated during the rock breaking process of the drill bit, which cannot effectively reduce the vicious vibration of the drill bit when drilling into igneous rock or conglomerate formations; on the other hand On the one hand, power drilling tools such as screw and turbine only rely on the output of large torque and high speed to assist the drill bit to break rocks. The rock breaking energy is limited, and the ROP in high compressive strength and heterogeneous formations cannot be effectively improved.

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