Downhole torodial generator with central passage

• Main Authors: DAHLGREN SCOTT S, HALL DAVID R
• Format: Patent
• Language: English
• Published: 16.04.2013
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATION; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

What is claimed is a downhole tool string component comprising a generator. The generator may comprise a toroidal stator comprising an interior channel formed between inward extending stator poles. A coil of wire is disposed within the interior channel, and a plurality of magnets are rotatably disposed proximate each pole. A downhole tool string component comprises a bore to receive a flow of drilling fluid comprising a central passage and at least one peripheral passage. A compliant member is disposed within the bore and forms an internal diameter of the central passage, and at least one opening. The at least one opening comprises an internal area within the compliant member to divert the flow of drilling fluid into the at least one peripheral passage. The compliant member comprises a compliant property allowing the internal area of the at least one opening to change thus changing the amount of diverted drilling fluid.