Intelligent drilling angular difference measurement device and angular different measurement method

Abstract

The invention relates to an intelligent drilling angular difference measurement device and an angular difference measurement method. The measurement device comprises a geomagnetic field signal acquisition unit arranged in an annular cavity, wherein a level calibration unit for calibrating the geomagnetic field signal acquisition unit is also arranged in the annular cavity; the geomagnetic field signal acquisition unit is connected with a geomagnetic field signal preprocessing unit; the geomagnetic field signal preprocessing unit is connected with an angular difference measurement unit. According to the device and the method, the position of a starting point of a dial is regulated to be aligned with a zero point of MWD (measurement while drilling) or a zero point of a drilling tool, and an angular difference value is obtained by the steps of acquisition and preprocessing of a geomagnetic field signal, calculation and the like; a level gauge is arranged, so that an angular difference is only required to be measured twice under the condition of ensuring the levelness of the device, convenience in measurement is ensured, the number of measurement times is greatly reduced, the efficiency is improved, and measurement errors are reduced.

Description

technical field [0001] The invention relates to the technical field of drilling tool angle difference measurement tools used in directional wells and horizontal wells in petroleum drilling, and relates to an intelligent drilling angle difference measurement device and an angle difference measurement method. Background technique [0002] In the process of oil drilling, drilling technologies such as directional wells and horizontal wells have broad application prospects in the field of oil industry, and have become one of the development trends of the world oil industry. One of its key technologies is the precise control of borehole trajectory. Measurement-while-drilling technology is widely used in directional wells and horizontal wells as a tool for real-time monitoring of borehole trajectory. [0003] In the actual drilling process, since the measurement zero point of the measurement while drilling MWD system and the zero point of the downhole power drilling tool cannot com...

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Problems solved by technology

The above inventions have all improved the accuracy of angle difference measurement to a certain extent, but there are problems that in the aiming method, the calculation of the angle difference needs to be calculated manually, and the compass method is difficult to adjust the orientation on site, while the laser light source method is used. Among them, the dial needs to be manually rotated. Since the drill string is not fixed, there is a certain error in a single measurement, and it is time-consuming and laborious, and the efficiency is low. The automatic measurement function of the angle difference has not been realized.

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