STUDY AND APPLICATION OF CEMENTING TECHNOLOGY WITH ROTATING LINER

A rotating liner hunger and centralizer assembly of multistage bearing load support type were innovated in reference of micro-shoulder hunger to solve the problem of inferior quality of liner cementing. Using this device in cementing job in Jingbei and Dujiashan burial hill reservoirs, it changed the flow direction of the fluid, eliminated fluid dead zones, spread out cuttings, reduced cutting plugging effect and resulted in formation of a good and uniform cement mantle.