Patent ID: 11933113
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A centralizer, comprising:
a body defining a central bore and a plurality of cavities fluidically coupled to the central bore and an exterior of the body, wherein the plurality of cavities are located between the central bore and an outer surface of the body and comprise a downhole cavity and an uphole cavity;
a plurality of springs with each housed in one of the plurality of cavities and comprising a downhole spring housed in the downhole cavity and an uphole spring housed in the uphole cavity;
a plurality of pistons with each housed in one of the plurality of cavities and abutting a respective spring in that cavity; and
a centralizer pad pivotally connected to each of the plurality of pistons and extending radially from a longitudinal axis of the body in response to bias from the plurality of springs.