Patent ID: 11913300
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 8:
9. A method comprising:
installing a valve assembly in an interior opening that spans an axial length of a mandrel by removably mating valve coupling threads on an outer surface of a first segment of the valve assembly with inner coupling threads on an inner surface of a portion of the interior opening;
positioning the mandrel with the valve assembly within a flange bore defined between a first end and a second, opposite end of an extension flange, wherein a portion of the mandrel resides within the flange bore and a remainder of the mandrel extends out of the extension flange, wherein outer coupling threads are formed on an outer surface of the remainder of the mandrel;
coupling the outer coupling threads formed on the outer surface of the remainder of the mandrel with counterpart threads in a tubing spool inlet of a wellhead installed at a surface of a wellbore formed through a subterranean zone; and
injecting chemicals through the mandrel and the valve assembly into the wellbore through the tubing spool inlet.