Inventor
ZHANG XICHANG
US9 patents
⚠️ This page may combine multiple inventors who share the name “ZHANG XICHANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES OILFIELD OPERATIONS LLC
6 patentsUS11851971B2Dec 26, 2023
System and method for hanger and packoff lock ring actuation
BAKER HUGHES OILFIELD OPERATIONS LLC3 citations71
US11649689B1May 16, 2023
Sequential retrieval mechanism for bi-directional wellhead annulus packoff
BAKER HUGHES OILFIELD OPERATIONS LLC3 citations71
US12163397B2Dec 10, 2024
System and method for hanger and packoff lock ring actuation
BAKER HUGHES OILFIELD OPERATIONS LLC0 citations61
US11851972B2Dec 26, 2023
Bi-directional wellhead annulus packoff with integral seal and hanger lockdown ring
BAKER HUGHES OILFIELD OPERATIONS LLC1 citations61
US11512799B2Nov 29, 2022
System and method for anti-rotation between tubulars
BAKER HUGHES OILFIELD OPERATIONS LLC0 citations55
US11459833B2Oct 4, 2022
System and method for anti-rotation between tubulars
BAKER HUGHES OILFIELD OPERATIONS LLC0 citations53