Ground test system for working characteristics of double-pendulum acceleration drilling tool

Abstract

The invention relates to a ground test system for working characteristics of a double-pendulum acceleration drilling tool. The ground test system comprises an electric rotary disc, a trapezoidal support, a sealing circulating sleeve, an eccentric block, a circulating tank, a supporting table, a fixed disc, a circulating pump, displacement sensors, a fixed rod and a data processing and display system, wherein the lower end of the supporting table is fixedly connected with the surface of the fixed disc, the lower end of the trapezoidal support is fixedly connected with the top of the supportingtable, the electric rotary disc is fixed to the top of the trapezoidal support, and the bottom end of the circulating tank is fixedly connected with the surface of the fixed disc and is in through connection with one end of a circulating pipeline; the circulating pump is arranged on the circulating pipeline, and the other end of the circulating pipeline is in through connection with the sealing circulating sleeve; the fixed rod is vertically located on the surface of the fixed disc and is movable on the surface of the fixed disc; and a plurality of displacement sensors are arranged on the fixed rod, and the data processing and display system is electrically connected with the displacement sensors and collects, stores and displays measured data. The ground test system disclosed by the invention can test working characteristics of the double-pendulum acceleration drilling tool under different conditions.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas drilling, and in particular relates to a ground testing system for the working characteristics of a double-pendulum speed-increasing drilling tool. Background technique [0002] In recent years, my country's deep oil and gas resources are being vigorously developed, but deep drilling faces the bottleneck of speed-up in hard formations, especially in the Xinqingyu area in the west. For example, sandy conglomerate and mudstone formations above 4,000 meters, and tight dolomite and mudstone formations above 6,000 meters have hard formations, poor drillability, low ROP, and short life of drill bits, which seriously restrict the speed-up of deep wells. [0003] The rock-breaking efficiency of the drill bit is the most direct factor affecting the drilling speed. During the drilling process in hard formations, the drill bit has to withstand vibrations in various directions, showing jump...

AI Technical Summary

Problems solved by technology

During the drilling process in hard formations, the drill bit has to withstand vibrations in various directions, showing jumping, swinging or whirling state. According to the measured data provided by the American Smith Company, the radial acceleration of the drill bit can reach 100G-200G, and the axial acceleration can reach 100G-200G. Up to 5-30G, converted into an instantaneous force equivalent to 8 tons in the radial direction and 1.2 tons in the axial direction, so the state of the drill bit is extremely unstable, the cutting teeth cannot fully penetrate the formation, and the vibration in all directions seriously affects the life of the drill bit. Drastically reduces drilling efficiency

Images