Chemical stick receiving pressure vessel includes a housing having a body portion. Body portion forming a first opening at a first end and forming a second opening at a second end. Cap operable to close the first opening, wherein the cap forms an outlet. Plurality of stick receiving tubes mounted inside the body portion, wherein the stick receiving tubes are operable to receive chemical treatment sticks; a base portion being coupled to the second opening, wherein the base portion is operable to be placed on the ground and within a predefined proximity to a wellhead. Inlet formed on the side surface of the base portion. Fluid enters the inlet from the well-head and passes through the plurality of stick receiving tubes before exiting through the outlet to be placed in the annulus between the casing and tubing of the wellbore.