A small-diameter downhole rock slag cleaning tool in deep well section

Abstract

A small-diameter downhole rock slag cleaning tool for deep well sections belongs to the technical field of drilling equipment, and solves the problem that the deep well section small caliber downhole rock slag cleaning tool has a small amount of slag in a single time, low slag removal efficiency, and coarse rock slag cannot be cleaned. Problem, the solution is: a thrust bearing is installed on the water diversion joint, and the support spring is installed on the thrust bearing through the support spring joint, and the rock slag holding pipe is fixedly installed on the lower end surface of the support spring joint; the drive shaft The upper end of the supporting spring piece passes through the lower joint of the supporting spring piece, the thrust bearing, the upper joint of the supporting spring piece and extends to the water distribution joint, the lower end of the driving shaft passes through the lower joint of the supporting spring piece and extends to the rock slag holding pipe, and the lower end of the driving shaft is connected to the lower joint of the supporting spring piece. The upper end of the driven shaft is fixedly connected, and the other end of the driven shaft is fixedly connected with the screw rod of the helical wing drill bit through a coupling. The invention has the advantages of large amount of clearing at one time, high clearing efficiency, simple operation, and relatively reduced number of lifting and lowering drills.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, and in particular relates to a small-diameter downhole rock slag cleaning tool in a deep well section. Background technique [0002] During the full-scale drilling of small-caliber deep hole sections with complete leakage, the carved slag cannot be effectively brought out of the ground by the circulating flushing fluid, and sinks to the bottom of the well after stopping the pump, which is likely to cause buried drilling accidents, and then bring to huge economic losses. In order to ensure the safety of drilling and prevent accidents in the well, it must be cleaned in time to ensure that the bottom of the hole is clean. [0003] However, traditional rock slag cleaning tools have the following disadvantages: [0004] 1. The shape of the rock slag holding space: the "concentric annular space" formed by the central drill pipe and the outer slag pipe. Its disadvantages are: the diameter ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies in the prior art and solve the technical problems of small slag removal tools in the deep well section, the single slag removal rate is low, the slag removal efficiency is low, and the coarse slag cannot be completely removed. Water flushing deep well section small diameter downhole rock slag cleaning tool

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