Electronic devices for high temperature drilling operations
AssigneesSinopec Tech Houston, China Petroleum & Chemical Corporation
InventorsSheng ZHAN, Jinhai ZHAO, Herong ZHENG, Weiping XU
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Abstract
The present disclosure provides the printed circuit board assembly suitable for operating downhole at high temperatures. The printed circuit board assembly has a ceramic circuit board with a plurality of chips installed on it. At least one of the chips has an aluminum nitride or a silicon nitride substrate. In some of the chips, aluminum nitride is used as the oxide layer in a Si-on-Insulator configuration. In other chips, integrated circuits are fabricated on a substrate made from aluminum nitride, silicon nitride, silicon carbide, or sapphire.
Claims17
A drilling system, comprising:
- a drilling assembly comprising a drill bit and a drill collar;
- a plurality of drill strings;
- and
- a printed circuit board assembly installed in the drilling collar,
- wherein the printed circuit board assembly comprises a plurality of chips installed thereon, at least one of the chips comprises an integrated circuit fabricated on an aluminum nitride or a silicon nitride substrate.
A printed circuit board assembly, comprising:
- a plurality of chips installed on the printed circuit board assembly, wherein at least one of the chips comprises an integrated circuit fabricated on an aluminum nitride substrate or a silicon nitride substrate, and wherein the PCBA comprises a ceramic circuit board or a polyimide circuit board, wherein the printed circuit board assembly is suitable for operation in a downhole environment.
Dependencies are inferred from the claim text.