Laboratory experimental device for axial vibration and friction reduction characteristics of oil drilling string

Abstract

The invention discloses an indoor experimental device for antifriction resistance property of axial vibration of a petroleum drilling pipe column. The device comprises a simulated pipe column combination system, a loading system, a vibration system, a measurement system and a fixing system, wherein the simulated pipe column combination system comprises a simulated pipe column and a simulated shaft; the loading system comprises a loading hand wheel and a loading lead screw; the vibration system comprises a telescopic sleeve, a simulated vibration exciter and an impact baffle; the measurement system comprises pressure and displacement sensors, a data processing device, signal cables and a displacement sensor; the fixing system comprises a fixing bracket, fastening bolts, positioning bolts, a fixing piece, an experimental table and an open-groove bottom plate. The indoor experimental device can be used for researching the antifriction resistance property and mechanism of an axial vibration tool under the conditions of different wellbore curvatures, mounting positions, vibration amplitudes and frequencies, and provides a theoretical basis for design and field application of a special downhole tool for antifriction resistance of axial vibration.

Description

technical field [0001] The invention belongs to the field of oil drilling pipe string mechanics research, in particular to an indoor experimental device for axial vibration and friction reduction characteristics of oil drilling pipe strings. Background technique [0002] With the in-depth development of conventional oil and gas resources and the comprehensive development of unconventional oil and gas resources, the number of wells with complex structures such as highly deviated wells, horizontal wells, and multi-branch horizontal wells is increasing. During the drilling of these wells, especially during sliding drilling, due to factors such as the large contact surface between the pipe string and the well wall and the non-rotation of the pipe string, the friction between the pipe string and the well wall is very large, and the axial drilling pressure There are difficulties in down transmission and the drilling efficiency is reduced. And as the length of the horizontal secti...

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Problems solved by technology

The simulation process of this device has the following defects: (1) The length of the simulated wellbore and drill string of the experimental device is too short to overcome the influence of the end effect; (2) The simulated wellbore of the experimental device does not consider the influence of borehole tortuosity and vibration reduction. The influence of the position of the resistance tool

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