The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2019
Filed:
Sep. 06, 2018
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, CN;
Jian Zheng, Beijing, CN;
Wenxuan Chen, Beijing, CN;
Qingyun Di, Beijing, CN;
Zili Wang, Beijing, CN;
Yuntao Sun, Beijing, CN;
Yongyou Yang, Beijing, CN;
Wenxiu Zhang, Beijing, CN;
Abstract
An azimuthally acoustic imaging logging while drilling (LWD) apparatus employs two sets of transmitting transducers to excite multipole mode waves. One set is high-frequency monopole and polarized pole transmitting transducers, and the other set is low-frequency dipole and quadrupole transmitting transducers. Separation of a high-frequency transmitting state from a low-frequency transmitting state is realized by using a dual-row transmission solution. Each set of transmitting transducers operates at transducer resonance points through a matching circuit, thereby greatly increasing the transmitted energy. An operation mode of the azimuthally acoustic imaging LWD apparatus includes four kinds of transmitting modes of monopole, dipole, quadrupole and polarized pole; in terms of a sound insulator, a combined sound insulation mode of inner notch groove and inner reducers and tungsten rods is adopted; and signal reception may be realized by employing a high-sensitivity receiving transducer, which can effectively realize the signal reception.