A magnetic source beacon for downhole drilling positioning

Abstract

The invention relates to an underground magnetic positioning guiding tool, and especially relates to a magnetic source beacon used for underground drilling positioning and a use method thereof. The technical scheme is that the magnetic source beacon comprises a cable joint, an instrument cabin, a power supply connecting short section, an alternating magnetic field signal generation short section, a guiding piece connecting short section, a waterpower plug seat, a waterpower plug, and a metal guiding head. The lower part of the instrument cabin is connected with the cable joint. The upper part of the instrument cabin is connected with the power supply connecting short section, the alternating magnetic field signal generation short section, and the guiding piece connecting short section in sequence. The upper part of the guiding piece connecting short section is connected with the waterpower plug seat. The waterpower plug seat fixes the waterpower plug through a waterpower plug pin. The waterpower plug is connected with the metal guiding head. Beneficial effects of the method are that magnetic source beacon can be effectively realized, the magnetic source beacon is good in controllability, high in positioning precision, simple in structure, convenient in operation, and low in influence on well drilling technology.

Description

technical field [0001] The invention relates to an underground magnetic positioning and guiding tool, in particular to a magnetic source beacon for underground drilling and positioning. Background technique [0002] As oil and gas development gradually shifts from large integrated oilfields and conventional reservoirs to low-permeability, low-pressure, low-productivity reservoirs and unconventional reservoirs, the number of wells with various complex structures, such as interconnected wells and double-horizontal wells, is gradually increasing. , these complex structure wells put forward extremely high requirements on the ranging accuracy of directional well construction. Complex structure wells are cutting-edge technologies that can greatly increase the production and ultimate recovery of oil and gas wells. The core of complex structure well technology lies in the control and guidance of wellbore trajectory. Sensors such as gyroscopes measure trajectory parameters such as i...

AI Technical Summary

Problems solved by technology

Complex structure wells are cutting-edge technologies that can greatly increase the production and ultimate recovery of oil and gas wells. The core of complex structure well technology lies in the control and guidance of wellbore trajectory. Sensors such as gyroscopes measure trajectory parameters such as inclination angle and azimuth angle. During the drilling process, the control of the wellbore trajectory is based on the measurement of the current drilling direction. From the perspective of the system formed by the wellbore to be drilled and the target point, this This type of method belongs to open-loop control, and does not consider the guiding ability of the target point to treat the drilling hole. With the continuous improvement of the drilling steering accuracy, the traditional geometric steering positioning technology has been unable to meet the high-precision requirements of the wellbore trajectory.

At the same time, the conventional measurement while drilling system, the factors that affect the accuracy of the measurement data of the borehole trajectory parameters (the accuracy of the inclinometer itself, whether the measurement environment interferes with the measurement of the instrument, the accuracy of the position of the measuring point, whether the axis of the inclinometer and the axis of the borehole There is a certain error in the direction of coincidence, etc., it is difficult to avoid the accumulation of errors, and it cannot meet the needs of high-precision guidance

[0003] In order to solve the problem of low steering precision when the existing geometric steering positioning technology is applied to the drilling of complex structure wells, the active magnetic steering technology is introduced into the construction of complex structure wells, in which the effective alternating magnetic field signal generated by the magnetic source beacon is the key to downhole positioning and guidance. The key component of the system, when the measurement is required, the magnetic source beacon is lowered into the corresponding position, and the magnetic source beacon generates an effective alternating magnetic field signal and transmits the inclinometer data to the ground, thereby providing the necessary data for positioning and guidance calculations, so the development The development of magnetic source beacons with strong controllability, high positioning accuracy, simple structure, easy operation and little impact on drilling technology is an inevitable requirement for high-precision downhole positioning and steering technology

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