Device for correcting well wall and enhancing drill gauge protection effect through rolling

Abstract

The invention discloses a device for correcting a well wall and enhancing a drill gauge protection effect through rolling. The device comprises a roller base (2) and a roller (4), wherein the roller base (2) is installed on a gauge-protection cutting surface of a drill (12) through a screw (1), the roller (4) is rotatably installed on the roller base (2) through a pin roll (3), the roller (4) is sleeved on the pin roll (3), and two ends of the pin roll (3) are installed on the roller base (2). The device has the advantages that the well wall is corrected through rolling, the friction between the roller and the well wall is reduced, the effective abrasion volume is increased, and the gauge protection effect is enhanced; simultaneously, a gauge protection unit can roll or roll and slide relative to the well wall and has well reaming and well wall smoothening functions, so that the well quality is improved; the reaction torque during drilling is reduced, and the drill stability is improved; and by the aid of the device, the well track is ordered, the reaction torque during drilling can be reduced in highly-deviated wells and horizontal wells, the drill rotation probability is reduced, the drill service life is prolonged, and the mechanical drilling speed is accelerated.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling equipment, in particular to a device for correcting the well wall by rolling action and enhancing the effect of drill bit diameter protection. Background technique [0002] During the drilling process, the drill bit directly contacts the rock, and breaks the rock through cutting and punching. Drilling abrasive formations such as quartzite, hard dolomite, chert, etc. will accelerate the wear of the cutting teeth of the drill bit, especially the outer row of cutting teeth. As the diameter of the outer row of teeth decreases, the diameter of the drill bit decreases, and the diameter of the wellbore also decreases. The narrowing of the wellbore makes it difficult to drill again, and due to a large amount of frictional heat and large torque, the damage of the drill bit will be accelerated. [0003] The existing drill bit with stepped gauge structure is mainly composed of steel body, PDC c...

AI Technical Summary

Problems solved by technology

[0011] In recent years, with the development of directional technology in drilling engineering, the rotary steerable tools have required the drill bit to have a strong lateral cutting ability, but simply improving the lateral cutting ability of the crown of the drill bit will cause excessive torque

Images