Hydraulic control type reaming tool during drilling

Abstract

The invention relates to a hydraulic control type reaming tool during drilling. The hydraulic control type reaming tool during drilling is used for enlarging the diameter of a wellbore in the petroleum and natural gas industry and solves the problem of wellbore diameter reduction generated in the well drilling process. According to the technical scheme of the hydraulic control type reaming tool during drilling, the upper end of an upper shaft body and the lower end of an upper joint are in screwed connection, and the lower end of the upper shaft body and the upper end of a lower shaft body are in screwed connection; one end of a connecting rod is hinged to the lower end of a reamer wing, and the other end of the connecting rod is hinged to a corresponding hinging support at the outer portion of a reamer wing seat; the three hinging supports at the outer portion of the reamer wing seat are installed in three grooves in the middle portion of the upper shaft body, the reamer wing is installed on a slope of the middle groove of the upper shaft body, and a piston cylinder is installed at the upper portion of an inner cavity of the lower shaft body; a center pipe is installed in inner cavities of the upper shaft body and the lower shaft body; and one ends of two sliding pins are fixed to two threaded holes in the lower portion of the lower shaft body, and the other ends of the two sliding pins are inserted in sliding groove rails at the lower end of the center pipe. By the adoption of the hydraulic control type reaming tool during drilling, well drilling fluid is used for control, operation is easy, control is effective, wellbore diameter enlarging can be effectively conducted, the quality of an oil and gas well is improved, and the well drilling cost is greatly reduced.

Description

technical field [0001] The invention relates to a liquid-controlled reaming-while-drilling tool for enlarging the borehole diameter in the petroleum and natural gas industry. Background technique [0002] With the continuous advancement of oil and gas well development technology in the oil and gas industry, the drilling depth is getting deeper and deeper, the oil and gas structure is becoming more and more complex, and various well conditions and accidents are becoming more and more diverse and complex. In the field of drilling engineering, due to the narrowing of the wellbore, the tripping operation is blocked and stuck. If it is not handled properly, accidents such as drilling tools buried and large sections of the wellbore scrapped may occur, causing serious economic losses. Under the action of circulation and bubbling of the drilling fluid, the diameter of the wellbore shrinks due to water dispersion and water absorption expansion. At the same time, the cuttings are disp...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulically controlled reaming tool while drilling in order to solve the problem of borehole diameter shrinkage during drilling

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