公开(公告)号：US10012063B2

公开(公告)日：2018-07-03

申请号：US14208622

申请日：2014-03-13

Applicant: Chevron U.S.A. Inc.

Inventor： Stein J. Storslett ,  Rick B. Spielman

IPC: E21B43/26 ,  E21B28/00

CPC classification number: E21B43/26 ,  E21B28/00

Abstract: A method, system, and electrode assembly are disclosed that maximizes the lifetime of electrodes for high energy electrical discharges in water by arranging the electrodes in concentric rings or a stack of concentric rings. The radii and the thickness of the ring electrodes are optimized for electrical reliability, low jitter, and minimal erosion. In one embodiment, the electrode assembly is configured to be disposed in a subterranean dielectric medium, receive an electric current pulse having a length of time greater than 100 microseconds, and form an electric arc between the first electrode and the second electrode, thereby producing a pressure pulse axially away from the insulator.

公开(公告)号：US10077644B2

公开(公告)日：2018-09-18

申请号：US14208525

申请日：2014-03-13

Applicant: Chevron U.S.A. Inc.

Inventor： Stein J. Storslett ,  Rick B. Spielman

IPC: E21B43/26 ,  E21B28/00

CPC classification number: E21B43/26 ,  E21B28/00

Abstract: An apparatus and method for generating high-pressure pulses in a subterranean dielectric medium are provided. The method includes providing an electrode assembly in the medium, the electrode assembly having first and second electrodes that define a gap therebetween. A shaped electric current pulse is delivered to the electrode assembly. The electric current pulse has a duration greater than 100 μs so that an electric arc is formed between the first and second electrodes, thereby producing a pressure pulse in the medium.