公开(公告)号：US10724332B2

公开(公告)日：2020-07-28

申请号：US15856834

申请日：2017-12-28

Applicant: CHEVRON U.S.A. INC.

Inventor： Robert C. Henschel, Jr. ,  Samuel E. Herod ,  Paul R. Boriack ,  Shane W. Pfaff ,  Thomas G. Hill, Jr. ,  Jason C. Mailand

IPC: E21B34/06 ,  E21B34/00

Abstract: A subsurface safety valve system for a wellbore is described. The system can include a tubular housing disposed within the wellbore having a cavity running in a longitudinal direction therethrough. The system can also include an electromagnetic device configured to receive electric power to create a magnetic field, and a flapper operative to open and close the cavity in response to the electric power received by the electromagnetic device. The flapper may open in response to the electric power exceeding a first electric power value and remain open in response to the electric power exceeding a second electric power value which is lower than the first electric power value.