METHOD OF PREPARATION OF CEMENT SLURRY AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: method of preparation of cement slurry using the cement mixing machine, cementing unit (CU) and cement surge tank comprises the cement mixing in grouting fluid. The obtained solution is pumped by the pump of the cementing unit through high-pressure injection hydroline into the cement surge tank. The obtained cement slurry solution is injected into the well through the high-pressure injection hydroline using another cementing unit. Meanwhile in one of the high-pressure injection hydrolines the hydromechanically acting cement slurry activator of the type "jet-to-jet" is connected. Jets flowing from two side conical hydromonitor attachments are facing to each other and form at contact the hydraulic shield. The central spray flowing from the conical attachment, equipped with insert, is directed perpendicularly to the hydraulic shield. Meanwhile the named hydromechanically acting cement slurry activator is connected to the high-pressure injection hydroline for pumping of cement slurry into the cement surge tank. And the insert of the central attachment of the hydromechanically acting cement slurry activator is selected with the possibility of forming of the centripetal flow. the subs equipped with the quick-detachable joint elements are screwed into connecting threads of the bushing and smaller stage of the housing.

EFFECT: increase of set strength, decrease of cement setting time.

3 cl, 4 dwg