localization of compounds for use in devices with a coiled rohrstrang

摘要

An apparatus for locating joints in coiled tubing operations, and for use during reverse circulating and fracturing operations, has a central passageway (72) for fluids, a collar locator module (28), a one-way valve (82) coupled to the central passageway to allow for the flow of fluids in one direction but not the other, a port (83) coupled to the central passageway to allow fluids to exit when the one-way valve is functioning, a movable cover module (84) to cover the port to build up pressure in the central passageway, and a flow diverting module (85) for permanently diverting the flow of fluids from the port to the central passageway. IMAGE