INVESTIGATION OF STABILITY LOSSES OF THE PACKER WITH A GIRDLE-CYLINDRICAL-CONICAL CONSTRUCTION

Abstract

In the paper stability losses of the packer with a girdle construction have been investigated by taking into account compactness mechanism. Expanding and constricting cases of conical surface of the packer with a girdle construction have been studied, stability problem of the packer has been solved via numerical estimation by using finite differences method. With this purpose, continuity condition of the deformation has been written for packer construction (cylindrical and conical surface of the packer) and added to stability losses condition. In the first approach the solution has been carried out in boundary and junction nodes of the packer (where cylindrical and conical surfaces combine), however, in the second approach by finite differences method. During packing process stability losses limit has been studied for the first time for a girdle construction. Keywords: packing, well packing, cylindrical-conical construction packing, mode of deformation, critical pressure in packing.