Novel internal single-action mechanism of drilling tool

Abstract

The invention relates to a novel internal single-action mechanism of a drilling tool. The novel internal single-action mechanism comprises a shaft. A first connector, a bearing block, an upper bearing, a shaft sleeve, a lower bearing and a lock nut are sequentially connected to the peripheral surface of the shaft from top to bottom. The shaft sleeve is arranged in a second connector. One end of the second connector is in threaded connection with the bearing block. The other end of the second connector is in threaded connection with an inner tube. The lower bearing and the shaft section, below the lower bearing, of the shaft are both located in the inner tube. Oil grooves are evenly distributed in the inner wall of the shaft sleeve in the axial direction. The shaft section between the lower bearing and the lock nut is sleeved with a spring and a gasket. The inner tube is provided with a radial oil hole which is communicated with an inner cavity of the inner tube. A bearing is arranged at the bottom of the inner cavity. The lock nut is arranged in the bearing. A gap is formed between the gasket and the lock nut. The spring is in a compression state. Through the utilization of the novel single-action mechanism, single action of the drilling tool can be achieved, and meanwhile the shaft, the shaft sleeve and the bearings in the single-action mechanism can be effectively protected. The novel internal single-action mechanism is long in service life and stable in performance.

Description

technical field [0001] The invention relates to a drilling tool for geological exploration, in particular to a single-action mechanism for separating inner and outer pipes in a single-action double-tube drilling tool. Background technique [0002] At present, the commonly used core drilling tools are mainly single-tube or double-tube single-action core drilling tools. high quality. Single-action double-tube drilling tools include socketed outer tube assembly and inner tube assembly. The outer tube assembly includes cartridge stopper, cartridge chamber, reamer, outer tube, drill bit and other components. The inner tube assembly includes Salvage mechanism, cartridge positioning mechanism, suspension mechanism, single-action mechanism, rock core breaking mechanism and other components, among which, the salvage mechanism consists of fishing spearhead, fishing spear seat, recovery tube, spring, etc., which are used to extract rock core; the cartridge positioning mechanism Inclu...

AI Technical Summary

Problems solved by technology

[0003] The single-action mechanism in the existing single-action double-tube drilling tool has the following defects: on the one hand, the oil tank is directly arranged on the rotating shaft, which seriously affects the strength of the shaft. Under special working conditions, it is easy to break when it is subjected to a large torque momentarily; On the other hand, there is no buffer mechanism on the shaft. When the shaft rotates, it is easy to cause vibration, and it is easy to damage the shaft and the bearing on the shaft. Moreover, because the shaft is long, only one pair of bearings supports the shaft. When running at high speed, The unbalanced radial force will accelerate the failure of the bearing. At the same time, the buffer mechanism is prone to frictional interference with the shaft, resulting in the scrapping of the single-acting mechanism.

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