Rotating impact acceleration device and method of power drilling tool

Abstract

The invention relates to a rotating impact acceleration device and a method of a power drilling tool. The device is characterized in that a rotor transmission shaft, a driving tooth-shaped impact hammer and a driven impact transmission joint are mounted at the inner side of a stator outer cylinder; the lower end of the rotor transmission shaft is in threaded connection with the driven impact transmission joint; the middle part of the rotor transmission shaft and the middle part of the stator outer cylinder are formed to a cylindrical cavity; an impact force accumulating spring is mounted in the cavity; the lower end of the impact force accumulating spring fits the driving tooth-shaped impact hammer; a tooth-shaped curved surface is arranged at the lower end of the driving tooth-shaped impact hammer, and is engaged with a tooth-shaped curved surface at the upper end of the driven impact transmission joint; the driven impact transmission joint is driven by the rotor transmission shaft to generate a rotating motion corresponding to the driving tooth-shaped impact hammer; and the driving tooth-shaped hammer and the impact force accumulating spring generate axial reciprocating impact on the driven impact transmission joint to realize the rotation and the impact. The device is simple in structure and shorter in length, and dose not influence the operations of the power drilling tool and a measuring tool while drilling.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to a device and method for speed-increasing by rotary impact of a power drilling tool. Background technique [0002] Directional wells are currently the most important well type for oil and gas field development. However, as the depth of oil and gas reservoirs continues to increase, the problem of slow drilling speed becomes more prominent. How to increase the speed in directional wells is one of the important research directions of petroleum engineering technology. The following problems exist in the speed-up in directional wells: (1) The drill bit is directly connected to the power drilling tool, and long-sized speed-up tools cannot be added in between; (2) The work of the speed-up tool cannot affect the use of the measurement-while-drilling tool; (3) The service life of the tool should not be too short , at least similar to the life of the power drilling tool; (4) When th...

AI Technical Summary

Problems solved by technology

The following problems exist in the speed-up in directional wells: (1) The drill bit is directly connected to the power drilling tool, and long-sized speed-up tools cannot be added in between; (2) The work of the speed-up tool cannot affect the use of the measurement-while-drilling tool; (3) The service life of the tool should not be too short , which is at least similar to the life of the power drilling tool; (4) When the tool has an accident, it cannot cause a downhole accident; (5) The use of the speed-up tool cannot provide a burden for the rotation of the power drilling tool

However, some of these tools have complex structures and short working life, which are difficult to meet the needs of the site; some are too large to match with power drilling tools, and some cannot be used together with measurement-while-drilling instruments. The above factors lead to the above-mentioned types of rotational impact Drilling tools have not been used in the field of speed increase in directional wells

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