Wellhead tubing and casing packer and installation and removal tool

Abstract From the Canadian patent

In the area of oilfield wellhead equipment and, specifically the wellhead valve known as the master valve on the wellhead array, a novel packer is described which can be put into place in a section of well tubing or casing close to the master valve using a novel tool. This packer will isolate the master valve from the well fluids and pressure, allow it to be taken off and replaced or, other equipment to be installed in its place and also, allow the master valve, its connections or other, equipment thus put on the well to be pressure tested prior, to removing the packer from the well tubing or casing and restoring the gas or fluid pressure to the wellhead array.