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While-drilling sonic probe with sound insulation structure

A sound wave probe and sound insulation technology, which is used in earth-moving drilling, surveying, wellbore/well components, etc. The effect of reducing the impact

Inactive Publication Date: 2014-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the acoustic wave probe used in wireline logging cannot be copied to the logging while drilling. The domestic patents of the acoustic logging while drilling mainly involve the content of the acoustic wave transducer or the sound insulation body of the drill collar. The pole transducer can be used in the production of acoustic probes, but the patent does not consider sound insulation and shock absorption, which will have a great impact on the measurement of acoustic waves while drilling

Method used

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  • While-drilling sonic probe with sound insulation structure
  • While-drilling sonic probe with sound insulation structure
  • While-drilling sonic probe with sound insulation structure

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The while-drilling acoustic wave probe with sound insulation structure, the receiving and transmitting probes adopt a modular structure, that is, several layers of piezoelectric vibrator modules are horizontally stacked and arranged inside a "U"-shaped probe compartment, and the probe compartment is filled with silicone oil and sealed. The cover plate is sealed, and a sound-transmitting window is preset in the middle of the sealing cover plate. The probe chamber wall is equipped with a high-voltage sealing plug. The positive and negative leads of the piezoelectric vibrator module are drawn out through the high-voltage sealing plug. The number of transmitting and receiving probes is matched by 1:4. .

Embodiment 2

[0029] The while-drilling acoustic wave probe with sound insulation structure, the receiving and transmitting probes adopt a modular structure, that is, several layers of piezoelectric vibrator modules are horizontally stacked and arranged inside a "U"-shaped probe compartment, and the probe compartment is filled with silicone oil and sealed. The cover plate is sealed, and a sound-transmitting window is preset in the middle of the sealing cover plate. The probe chamber wall is equipped with a high-voltage sealing plug. The positive and negative leads of the piezoelectric vibrator module are drawn out through the high-voltage sealing plug. The number of transmitting and receiving probes is matched by 1:4. .

[0030] The piezoelectric vibrator module is composed of a piezoelectric vibrator and two splints. The piezoelectric vibrator is inserted into the grooves of the splints on both sides, and the two parts are bonded together with high-temperature adhesive.

[0031] Each layer...

Embodiment 3

[0032] Embodiment 3 A typical embodiment

[0033] Refer to attached figure 1 , 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 batt...

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Abstract

The invention provides a while-drilling sonic probe with a sound insulation structure. Receiving probe bodies and transmitting probe bodies are respectively of a modularized structure, in other words, a plurality of piezoelectric vibrator modules are horizontally stacked and distributed in a U-shaped probe warehouse, the probe warehouse is filled with silicon oil and sealed through a sealing cover plate, a sound transmitting window is arranged in the middle of the sealing cover plate in advance, high-pressure sealing plugs are arranged on the wall of the probe warehouse, positive electrode leads and negative electrode leads of the piezoelectric vibrator modules are led out through the high-pressure sealing plugs, and the ratio of the number of the receiving probe bodies to the number of the transmitting probe bodies is 1:4. The while-drilling sonic probe with the sound insulation structure has the advantages that design and installation of the piezoelectric vibrator modules, match between the piezoelectric vibrator modules and the probe warehouse, and match between a drill bit and a drill collar are taken into full consideration, influences of noise of the probe on sonic logging while drilling are reduced as mush as possible, and accurate stratum rock longitudinal and transverse wave sound speed can be obtained. Besides, through the modularized structures, the probe modules are easy to detach and replace, the probe modules can be independently tested and functions can be checked.

Description

technical field [0001] The invention relates to an acoustic wave probe while drilling in the technical field of well logging, in particular to an acoustic wave probe while drilling with a sound insulation structure. 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 drillin...

Claims

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Application Information

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IPC IPC(8): E21B47/14E21B49/00
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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