Chemical treating system for oil wells
OwnerL. C. McClureinventor
Life of this patent
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Abstract
A chemical treating system for oil wells in the form of a chemical injector and well manifold for protecting down hole oil well equipment from corrosion by injecting a predetermined quantity of chemical additive into a circulating fluid. The equipment includes a supply tank or reservoir supported in elevated position above a calibrated measuring container which discharges into a mixing vessel communicated with pipes connected with the tubing and casing respectively of an oil well with valving arrangements being provided to enable the chemical additive to be injected into a circulating fluid and circulated through the tubing and casing and any down hole equipment associated therewith for a desired period of time.
Claims9
An oil well treating system in which the oil well includes a casing in the bore hole and a production tubing string in the casing, said system comprising a pipe communicated with the upper end of the production tubing string and a pipe communicated with the upper end of the casing, said pipes extending away from the oil well and disposed in spaced relation, a stand rigidly interconnecting said pipes and extending above the pipes, a supply tank for chemical additive supported by said stand, a measuring container supported by said stand below the supply tank for receiving a predetermined quantity of chemical additive therefrom, a mixing vessel supported from said stand below the mixing container and communicated therewith, said mixing vessel being disposed above said pipes, a bypass line extending from each of said pipes to said mixing vessel with valves in each of the bypass lines to enable circulation of fluid through the mixing vessel and pipes for flushing chemical additive in the mixing vessel into the oil well for treating down hole equipment in the well.
A device for injecting a quantity of additive into a fluid flow line comprising a pair of spaced pipe sections incorporated into a flow line and providing a flow path, a mixing vessel supported adjacent the pipe sections, bypass conduits connecting the pipe sections to the vessel, each bypass conduit including a valve to selectively communicate the vessel with the pipe sections, each pipe section including valve means to close at least one of the pipe sections and divert flow through the bypass conduits and the mixing vessel, and means supplying a predetermined quantity of additive to the mixing vessel when the bypass conduit valves are closed, the last-mentioned means including a measuring container having a gravity discharge to the mixing vessel, a valve in said gravity discharge, and a vent in said mixing vessel to exhaust said mixing vessel when the bypass conduit valves are closed, thereby enabling gravity discharge from the container to the vessel.
Dependencies are inferred from the claim text.