FIELD: testing equipment. SUBSTANCE: invention refers to equipment testing various properties of sealing fluid medium hardening under action of shearing force used to seal underground strata in zone around bore hole or blocking hole in case of unintentional penetration of water into it. Gear includes means creating shearing force and at least one means measuring structural properties of sealing fluid medium hardening under action of shearing force. First means is manufactured in the form of cylinder with inlet and outlet holes, valves and piston sealed with respect to cylinder walls and pumping sealing fluid medium into cylinder through inlet hole and forcing it out through outlet hole, adjustable valve creating needed shearing force mounted behind outlet valve, aid measuring pressure difference across adjustable valve and collector of sealing fluid medium forced under pressure through adjustable valve mounted behind it. EFFECT: design of simple, reliable and efficient gear ensuring adjustment of shearing force which acts on fluid medium during test. 8 cl, 2 dwg
