초록 ▼

An inductor assembly is disclosed for protecting electronic circuitry in a downhole equipment string. The inductor assembly includes a plurality of modular inductors coupled to one another in series to provide the desired inductance. The modular inductors are supported by a support structure in a pr

An inductor assembly is disclosed for protecting electronic circuitry in a downhole equipment string. The inductor assembly includes a plurality of modular inductors coupled to one another in series to provide the desired inductance. The modular inductors are supported by a support structure in a protective housing, such as in a common housing with the electronic circuitry. The inductor assembly is electrically isolated from the housing. The support structure may include insulative end members and rail members extending between the end members to which the inductors are secured. One or more insulative covers are provided around the inductors to further isolate the inductors from the housing. The inductor assembly dissipates energy in the event of certain failure modes of power supply circuitry or lines extending from the earth's surface. The inductor may be secured electrically between a neutral node in a Y-wound motor to prevent high voltage ac waveforms from damaging the electronic circuitry. Insulation of the inductors inhibits arcing with the housing, thereby inhibiting damage to the inductors or the electronic circuitry during such failure modes.

대표청구항 ▼

[ What is claimed is:] [1.] An inductor system for an equipment string configured to be deployed in a well, the equipment string including at least one powered component coupled to a power cable extending between the earth's surface and the equipment string when deployed, and a direct current circui

[ What is claimed is:] [1.] An inductor system for an equipment string configured to be deployed in a well, the equipment string including at least one powered component coupled to a power cable extending between the earth's surface and the equipment string when deployed, and a direct current circuit receiving power via the power cable, the inductor system being configured to be coupled between the powered component and the direct current circuit, the inductor system comprising:an inductor including a conductive coil and a ferromagnetic core;an electrically insulative support structure including an support portion configured to contact and retain the inductor, and an interface portion coupled to the support portion for supporting the inductor in a conductive housing, the support structure electrically isolating the inductor from the conductive housing; andan insulative covering extending over the inductor to isolate the inductor and the support portion from surrounding conductive surfaces within the housing, the support portion including a plurality of support rails secured to the inductor and the insulative covering including at least one insulative jacket disposed around the support rails and the inductor.