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Directional sound wave logging while drilling device

A sound wave, azimuth technology, applied in the direction of earthwork drilling, wellbore/well components, etc., can solve problems such as incorrect measurement, and achieve the effect of reducing influencing factors

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is a transducer or a drill collar sound insulator, it will be affected by different conditions when realizing the measurement function, and one aspect cannot be considered separately, otherwise the measurement will be incorrect

Method used

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  • Directional sound wave logging while drilling device
  • Directional sound wave logging while drilling device
  • Directional sound wave logging while drilling device

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Embodiment Construction

[0022] Such as figure 1 As shown, the azimuth acoustic logging device while drilling includes: special drill collar 1, acoustic system (transmitting probe 10, receiving probe array 9), measurement and control circuit 3, power supply battery 4 and upper and lower diversion sleeves 5, 6. The special drill collar 1 is a non-magnetic drill collar with an outer diameter of 178mm. The center of the special drill collar 1 is a mud flow channel. In order to install the acoustic system, centralizers 7 and 8 are designed during the processing of the special drill collar 1 to ensure sufficient The sound system is installed at the position, and the sound system is placed through the slot on the side wall of the centralizer. The sound system communicates with the upper end measurement while drilling system MWD (Measurement While Drilling) through the upper and lower guide sleeves 5 and 6 respectively, and is connected with the power supply battery 4 and the measurement and control circuit. ...

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Abstract

A directional sound wave logging while drilling device comprises a drill collar special for the directional sound wave logging while drilling device and a directional sound wave while drilling sonic system installed on a drill collar upper centralizer and composed of a single-transmitting four-receiving probe, and adopts a groovy sound insulator on the drill collar to inhibit drill collar direct waves from a transmitting probe to a receiving probe, wherein the transmitting probe and the receiving probe are respectively powered on by a special power supply battery. A measurement and control circuit receives acquired waveform data to perform real-time calculation treatment, communication interfaces are provided for a measurement while drilling system (MWD) and a ground processing system, the power supply battery and the measurement and control circuit are arranged in a compression resistance barrel in a special drill collar mud flowing channel special for sound waves, and upper and lower flow guiding sleeves are connected with the sonic system. The stratum rock longitudinal and transverse sound velocity measured in the drilling process in real time can be used for lithological identification, porosity degree calculation, rock mechanical parameters, well opening stability prediction and the like.

Description

technical field [0001] The invention relates to an azimuth acoustic logging device while drilling in the field of logging devices. Background technique [0002] In recent years, acoustic logging technology has been successfully applied in the process of drilling while drilling. Acoustic logging while drilling uses the sliding wave measurement method to measure the changes in the sound velocity of longitudinal and shear waves in the formation rock in real time. By measuring the longitudinal and shear wave velocities of the formation, it can not only provide formation porosity, improve drilling safety factor through real-time formation pressure prediction, and pass and seismic data Combined with reducing the risk of geophysical exploration and improving the efficiency of geosteering, it can also analyze rock mechanical properties and predict drilling accidents. The sonic logging while drilling completes the sonic logging operation while drilling, which reduces the time occupi...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 杨锦舟肖红兵黄敬乔文孝鞠晓东施斌全赵红林
Owner CHINA PETROLEUM & CHEM CORP
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