CASING VIBRATION SHOE Russian patent published in 1997 - IPC

FIELD: construction of oil and gas wells, more specifically, shoes of flow and intermediate casing strings. SUBSTANCE: casing vibration shoe includes turbodrive with shaft. Turbodrive body is connected with casing by sub. Secured to shaft is unbalanced mass. Shaft lower part protrudes from turbodrive body. Unbalanced mass is secured to shaft lower part. It protrudes from turbodrive body. Body is made with recess on its external surface. Recesses are made for connection with finishing set. Outer diameter of turbodrive body is smaller than inner diameter of casing string by 70-80 mm. Sub is made of aluminium alloy or bronze. EFFECT: higher quality of cementing of casing strings. 2 cl, 1 dwg