Deep well drilling execution mechanism with drill column based on dual-speed variable-torque drill bit

Abstract

The invention belongs to the technical field of drilling, and particularly relates to a deep well drilling execution mechanism with a drill column based on a dual-speed variable-torque drill bit. The deep well drilling execution mechanism comprises a drill bit drill rod, a pressing support plate, a pressing electromagnetic telescopic rod, a connection mechanism, a drill bit, a positioning bracket, a second positioning mechanism, a first positioning mechanism and a drill column, wherein the drill bit is arranged on the drill bit drill rod; the drill bit drill rod is arranged on the pressing support plate through a bearing; the pressing electromagnetic telescopic rod is arranged on the positioning mechanism; the positioning mechanism is used for adjusting the radial distance of a positioning contact on the positioning mechanism through a positioning electromagnetic telescopic rod to ensure that the drill column is positioned on the center line of a well body; moreover, the positioning mechanism can be fixed relative to the well body; a mounting platform is provided for a fixing part of the drill bit; the distance between the drill bit and the positioning mechanism is variable under the pressure of the pressing support plate; the connection structure has the characteristics of transmission function and adjustable length, so that smooth running of transmission can be ensured. The deep well drilling execution mechanism has good practical effects on the aspects of structure and well positioning.

Description

[0001] Technical field [0002] The invention belongs to the technical field of drilling, and in particular relates to a deep well drilling actuator with a drill string based on a double-speed variable-torque drill bit. Background technique [0003] At present, drilling equipment often uses uphole power output, and the power is transmitted to the downhole drill bit through the drill string. When the drilling depth is required to be very deep, an ultra-long drill string is required, which is often formed by splicing multiple drill strings. When the deep well drilled is directional drilling, the axis of the wellbore will have one or more inflection points, and it is difficult to ensure that the drill string works on the centerline of the wellbore, which will lead to the deviation of the drilling bit. It is necessary to keep the drill string on the centerline of the wellbore, or just the drillstring near the connection to the bit, on the centerline of the wellbore. [0004] For...

AI Technical Summary

Problems solved by technology

On the one hand, the former requires a motor to drive the oil pump to produce hydraulic oil with pressure. Because of the oil pressure, oil leakage is often prone to occur, and the requirements for oil cylinder technology and sealing technology are relatively high, resulting in high cost and complicated mechanism; for the latter, use Driven by a motor, the structure is simpler than the former, but because of the meshing transmission between the gear and the screw, when the load changes suddenly, it is easy to cause fatal damage to the push rod, that is, the range of use is narrow

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