Multi-branch borehole ultra-short radius windowing sidetrack drilling orientation tool and using method

Abstract

The invention relates to a multi-branch borehole ultra-short radius windowing sidetrack drilling orientation tool and a using method, the windowing sidetrack drilling orientation tool comprises an oblique fixator, when an oblique device back-off rod and an oblique device centralizing ring in the oblique fixator are lifted out of a well, a guide slope of a guide slope body can be stacked with a recoverable positioner, and the recoverable positioner can be used for positioning the inclined slope of the guide slope body. The recoverable positioner is mainly composed of an upper positioning body, a centralizing body and a lower positioning body, the upper positioning body and the lower positioning body are respectively provided with a guide inclined face, the angle of the guide inclined face on the lower portion of the lower positioning body is the same as that of the guide inclined face of the guide inclined body in the inclined fixator, and a fishing thread is arranged in the upper positioning body. And the upper positioning body is sequentially connected with the positioner reversing rod and the positioner upper joint. And the guide inclined surface of the lower positioning body in the recoverable positioning device and the guide inclined body of the inclined fixer at the bottom of the windowing sidetrack drilling window can be stacked in a matched manner. According to the method, multi-window windowing can be achieved in the main borehole, the operation cost is reduced, and the remarkable development effect of reducing cost and improving efficiency can be achieved.

Description

technical field [0001] The invention relates to an ultra-short-radius window sidetracking directional device and a using method for a multi-lateral wellbore in the petroleum industry, in particular to a multi-lateral wellbore ultra-short-radius windowed sidetracking directional tool and a using method. Background technique [0002] At present, most of the old oilfields in my country have entered the middle and late stages of development. The pressure coefficient of the main blocks is getting lower and lower, and the economical exploitation of traditional drilling methods is getting worse and worse. The horizontal drilling of horizontal wells in the old wellbore is the most important part of today's oil exploration. It is one of the most economical means of increasing production. However, conventional sidetracking horizontal wells have long deviated sections and large front-target displacements, so the remaining oil around the old wells near the well cannot be effectively prod...

AI Technical Summary

Problems solved by technology

Chinese patent ZL2008101194691 discloses a radial horizontal drilling device, which uses a high-pressure hose to connect a jet drill bit, and the jet drill bit sprays high-pressure water jets to break rocks and form horizontal boreholes. This technology has the following problems: using this jet to break rocks and form The borehole diameter of the horizontal well is small, the channel is irregular and due to the reason of the hose, the trajectory of the hydraulic jet bit is uncontrollable, the formed well trajectory is irregular, the well trajectory cannot be measured, and there is a lack of suitable completion technology. Sand reservoirs cannot prevent sand, and the wellbore is easy to collapse and close because there is no support, and the production declines rapidly

[0016] The tilter itself must be equipped with a setting and unsealing mechanism, which increases the complexity of the tool, reduces the reliability of use, and has the risk of recovery failure;

[0017] After the recliner is recovered, another set of new recliners must be installed at different depths, and each time the recliner is set, a gyroscope needs to be lowered to determine the slope orientation of the recliner, which increases the construction period. And significantly increased the construction cost;

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