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

Claim 0:
1. A wellbore chemical injection assembly comprising:
an extension flange comprising a first end and a second end opposite the first end, the extension flange defining a flange bore between the first end and the second end, the first end configured to be fluidically coupled to a tubing spool inlet of a wellhead installed at a surface of a wellbore formed through a subterranean zone, the second end configured to be fluidically coupled to a chemical reservoir from which chemical is injected through the flange bore into the tubing spool;
a mandrel positioned within the extension flange, a portion of the mandrel residing within the flange bore, a remainder of the mandrel extending out of the extension flange, the mandrel defining an interior opening spanning an axial length of the mandrel;
outer coupling threads formed on an outer surface of the remainder of the mandrel, the outer coupling threads configured to removably mate with counterpart threads in the tubing spool inlet;
inner coupling threads formed on an inner surface of a portion of the interior opening; and
a valve assembly removably seated in the interior opening, the valve assembly comprising valve coupling threads on an outer surface of the valve assembly, the valve coupling threads configured to removably mate with the inner coupling threads formed on the inner surface of the portion of the interior opening.