A reciprocating borehole dredging tool

Abstract

The invention relates to a reciprocating type borehole dredging tool used in the process of drilling well-completion practice. The reciprocating type borehole dredging tool solves the problem of blocked drilling fluid in a sleeve and being difficult to lower a logging instrument. According to the technical scheme, the upper end of a cable is connected to a ground console, and a wire core of the lower end of the cable communicates with a wire connecting opening of a stepping motor; an output end of the stepping motor and a bearing seat are driven by a key; a drive screw sleeve is installed at the lower portion of the outer circle of a drive screw, and the lower portion of the outer circle of the drive screw sleeve is connected with a screw thread of the upper portion of the inner cavity ofa sliding sleeve; the lower end of the drive screw and an anti-falling-cap thread are tightened; the lower portion of the outer circle of the sliding sleeve is provided with a conical convex platform,and the lower end of the inner cavity of the sliding sleeve is connected with the upper end of the outer circle of stirring heads; and anchor claws are placed in radial step holes on centralizing wings of the outer circle of the anchor, cover plates are fixed with bolts b on the centralizing wings of the outer circle of the anchor, and the cover plates pass through grooves of the outer end facesof the anchor claws. The stepping motor is adopted to drive the reciprocating type borehole dredging tool, the control is simple, the reciprocating movement of the stirring heads is used, drilling fluid can be stirred effectively, the viscosity of the drilling fluid is reduced, and the borehole dredging operation is carried out effectively.

Description

technical field [0001] The invention relates to a reciprocating borehole dredging tool used in the process of drilling and completing wells. Background technique [0002] Drilling and completion operations are an important link in the process of oil and gas development, and the quality of drilling and completion operations directly affects oil and gas production efficiency. Drilling and completion operations are extremely complex, with high technical difficulty and high economic investment. In order to ensure the quality of drilling and completion operations, it is necessary to use a large number of logging instruments to monitor the downhole environment at all times to guide the drilling and completion operations in real time. During the well completion operation, the logging instrument is connected to the cable and lowered into the wellbore by the cable. During the lowering process, the logging instrument needs to pass through the drilling fluid in each layer of the casing...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a reciprocating borehole dredging tool in order to solve the problem of drilling fluid blockage in the casing and difficulty in lowering the logging instrument.

Images