DEVICE FOR PRESSURISATION OF TUBE SPACE Russian patent published in 2009 - IPC E21B33/16 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and it is implemented at stabilisation of wells and is designed for pressurisation of tube space. The device consists of a cylinder case, and of a bushing with upper and lower side apertures; a partition equipped with seats is located between the side apertures. A cone with the central aperture is installed on the upper end of the bushing, while the lower end is made conic. The invention facilitates reliability of this device operation in casing tube string of any size. Also there is achieved decreasing of device dimensions, capability of device application in combination with any other elements, accuracy of determination of completion moment at forcing grout mix through without using a squeezing plug, simplification of device internal parts drilling out at putting the well into operation.

EFFECT: decreasing of device dimensions, capability of device application in combination with any other elements, accuracy of determination of completion moment at forcing grout mix through without using squeezing plug, simplification of device internal parts drilling out at putting well into operation.

1 cl, 2 dwg