Apparatus and method for use in injecting fluids in a well

Abstract

A removable injection valve insert assembly is disclosed for deploying in production tubing of a well casing. The production tubing includes a landing nipple with an inlet and a sliding side-door which covers and seals the inlet when in a closed position and uncovers the inlet when in an open position. The insert assembly controls the flow of flushing fluid that is injected into the inlet from an annular source between the casing and the production tubing. The valve directs the controlled flushing fluid to an injection line, which in turn injects the flushing fluid into the production stream of the well. Preferably, the injected flushing fluid is injected below the casing perforations. The insert assembly comprises a body having upper and lower ends, a first passage formed in the body for receiving the fluid from the inlet and a second passage in communication with the first passage for housing a flow control valve. The body also includes a by-pass passageway which allows production flow across the insert. The second passage extends to the lower end of the body and receives the injection line. The injection line extends down the production tubing to the casing perforations to inject flushing fluid into the production flow to reduce concentrations of salt and other elements in the production flow and to dislodge deposits that may build up in the perforations.