Apparatuses and methods for testing wellbore fluids

摘要

An apparatus may be used to test the ability of a first fluid to remove a second fluid from a surface. The apparatus comprises a reservoir that contains the first fluid and a testing cell that contains the second fluid. The testing cell also contains a rotor within. The first fluid is pumped into the testing cell, thereby displacing the second fluid. The displaced second fluid flows to a collection vessel. The apparatus is particularly useful for determining the ability of a chemical wash or a spacer fluid to remove non-aqueous drilling fluids from a metallic surface.

主权项

1. An apparatus, comprising:
(i) a reservoir containing a piston and a piston rod; (ii) a testing cell; (iii) a rotor connected to a stirring apparatus with an adjustable rotational speed, the rotor and stirring apparatus placed inside of the testing cell; (iv) a collection vessel; (v) a pressurization system directly connected to the reservoir; (vi) a fluid transport system; (vii) a pressure gauge; and (viii) a piston displacement control system, wherein the piston rod is attached to the piston and the piston displacement control system, and the pressure gauge, the reservoir, the testing cell, and the collection vessel are connected to each other by the fluid transport system having at least one valve.