CENTRALISER FOR CENTERING AUXILIARY CASING PIPE INSIDE MAJOR CASING PIPE AND METHOD FOR MANUFACTURING THEREOF Russian patent published in 2010 - IPC E21B17/10 

FIELD: oil and gas production.

SUBSTANCE: centraliser for centering an auxiliary casing pipe inside a major casing pipe comprises a body with edges fixed on its surface. The body represents two split collars coaxially cut directed and fixed on the ends of the longitudinal edges, two of which are fixed at the cut edges, designed to be fixed in relation to each other when installing on the surface of the auxiliary casing pipe and cut compression. The method of manufacturing the centraliser involves making the body with edges and fixing on the surface of the auxiliary casing pipe lowered in the major casing pipe. The offered centraliser for centering an auxiliary casing pipe and the method of manufacturing thereof allows reducing materials consumption once as a body, it uses two split collars, and reduction of the sectional area ensures to apply them in an auxiliary inserted joint casing with preserving greater flow section diametre of the well.

EFFECT: higher throughput capacity of the intefin pass, reduced flow resistance of injected cement and improved cementation.

2 dwg, 2 cl