Testing device for testing friction and torque of drilling column

Abstract

The invention provides a testing device for testing friction and torque of a drilling column. The testing device comprises a drilling pressure loading system, a rotary system, a well body simulation system and a detection system, wherein the drilling pressure loading system comprises a servo motor I; the servo motor I is connected with a synchronous belt through a synchronous wheel so as to drivea ball screw to rotate; the ball screw is connected with a sliding platform; the sliding platform moves up and down along the ball screw; the rotary system comprises a servo motor II arranged on the sliding platform; the servo motor II is connected with the drilling column through a shaft coupler so as to drive the drilling column to rotate and move; the well body simulation system comprises the drilling column; the bottom of the drilling column is connected with one end of a shaft; the other end of the shaft is connected with a drilling bit; the detection system comprises a displacement sensor and a compression force sensor which are mounted on a horizontal section of the drilling column, and a dynamic torque sensor and a pull pressure sensor which are arranged on a vertical section and the horizontal section of the drilling column; and a drillable device is arranged at the end part of the drilling bit. The testing device has the characteristics of simplicity in operation and easinessfor realization.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas drilling, in particular to a drilling string friction torque testing device. Background technique [0002] Drill string friction torque is the main factor affecting the drilling efficiency of horizontal wells and extended reach wells. Accurate friction torque is the key to optimize drilling operation parameters and achieve efficient, fast and successful drilling. However, due to many assumptions in the existing friction torque theoretical model, the calculated value is quite different from the real value, and the model cannot accurately reflect the mechanical behavior of the drill string. Therefore, experimental research has become an important way to promote the continuous improvement of the theoretical model and obtain the real static, kinematic and dynamic behavior of the drill string. The existing test equipment only considers the interaction between the drill string and the wellb...

AI Technical Summary

Problems solved by technology

The existing test equipment only considers the interaction between the drill string and the wellbore in the horizontal well section, and ignores the influence of the interaction between the drill string and the wellbore in the vertical and curved well sections on the mechanical behavior of the drill string. There is an urgent need for a drill string friction torque test device that can simulate a complete wellbore

Images