Underground acoustic wave testing device
A testing device and sound wave technology, applied in the directions of measurement, wellbore/well components, earthwork drilling and production, etc., can solve the problems of poor adaptability, low efficiency of cable testing, high cost, etc., and achieve the effect of convenient fixing and unsealing
Active Publication Date: 2016-04-06
PETROCHINA CO LTD
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Problems solved by technology
However, wireline testing has the characteristics of low efficiency and high cost, especially for directional wells, deviated wells and horizontal wells, and its adaptability is poor
Using the oil casing as the signal transmission channel and the sound wave as the carrier, it is one of the options to realize the wireless control of the downhole, but the transmission characteristics of the sound wave in the real well are not yet clear.
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0019] In the present invention, the matching pusher is the core. In the actual test process, it is carried down into the oil casing through the cable, and the ground controls it to be integrated with the oil casing. The ground emits sound waves, and the pusher and the oil casing Vibrating together, the acceleration sensor of the pusher measures the acoustic wave signal at any position, which is used for the analysis of the transmission characteristics.
[002...
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The invention provides an underground acoustic wave testing device, comprising a ground acoustic wave generator, a ground controller, an oil casing, and a sidewall contact device which enters downward in the oil casing by a cable. The sidewall contact device is integrally pushed against the oil casing on a selected position underground according to instructions sent out by the ground controller. The ground acoustic wave generator generates acoustic signals. The sidewall contact device and the oil casing vibrate together. The ground controller receives vibration signals through the cable, and the signals are compared with the acoustic signals generated by the ground acoustic wave generator, the transmission characteristics of the selected position are obtained. The underground acoustic wave testing device can be fixed on any position in the oil casing through a set of sidewall contact device, so as to measure the acoustic signals on any position, and compare the signals with the acoustic signals transmitted from ground, and then actual underground acoustic transmission characteristics are obtained. The sidewall contact device and the oil casing are convenient to fix and unseal, and operation is convenient and fast.
Description
technical field [0001] The invention belongs to the field of oil production engineering, and in particular relates to an electronically controlled downhole acoustic wave testing device. Background technique [0002] In the process of oilfield development, downhole signal transmission is one of the key technologies to realize downhole monitoring and control. Currently, the cable test is widely used, that is, the cable is inserted to realize signal transmission. However, wireline testing has the characteristics of low efficiency and high cost, especially for directional wells, deviated wells and horizontal wells, and its adaptability is poor. Using the oil and casing as the signal transmission channel and the sound wave as the carrier to realize downhole wireless control is one of the possible directions, but the transmission characteristics of the sound wave in the real well are not yet clear. Contents of the invention [0003] In order to verify the transmission characte...
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IPC IPC(8): E21B47/16
CPCE21B47/16
Inventor 孙福超裴晓含金旭俞佳庆郑立臣刘合
Owner PETROCHINA CO LTD