公开(公告)号：US20220243583A1

公开(公告)日：2022-08-04

申请号：US17164067

申请日：2021-02-01

Applicant: Saudi Arabian Oil Company

Inventor： Huseyin Rahmi Seren ,  Max Deffenbaugh ,  Mohamed Larbi Zeghlache

IPC: E21B47/092 ,  E21B23/00

Abstract: A downhole tool includes a body configured to move in a wellbore formed from a terranean surface to a subterranean formation in a direction downhole of the terranean surface independent of a downhole conveyance attached to the body; one or more sensors positioned in the body, the one or more sensors configured to measure a value associated with at least one of the wellbore or the terranean surface; and at least one mass positioned in the body and configured to adjust an orientation of the body in response to one or more forces acting on the body as the downhole tool moves in the wellbore in the direction downhole of the terranean surface.

公开(公告)号：US11333015B2

公开(公告)日：2022-05-17

申请号：US16436160

申请日：2019-06-10

Applicant: Saudi Arabian Oil Company

Inventor： Huseyin Rahmi Seren ,  Miguel Gonzalez ,  Sebastian Csutak ,  Max Deffenbaugh

IPC: E21B47/06 ,  E21B47/04 ,  E21B23/10

Abstract: An apparatus for determining properties of an uncharacterized downhole fluid. The apparatus comprises an oscillation driver circuit comprising an amplifier having an output and an input, a feedback loop between the output and input of an amplifier or a logic gate, an electromechanical resonator disposed within the feedback loop such that a the resonator is driven by the oscillation driver circuit, wherein a resonant frequency of the resonator defines an oscillation frequency of the oscillator circuit, and a switch device for causing the oscillator circuit to stop driving the resonator, which thereby enables observation of a decay rate of the oscillation of the electromechanical resonator within the uncharacterized fluid. The electromechanical resonator is enclosed in a conductive layer to protect the resonator against capacitive effects of the downhole fluid.