Method and apparatus for cementing a casing

摘要: Method and apparatus for cementing a casing in borehole two distinct stages by connecting the tool of invention series relationship respective to running entire string downhole into borehole. The which connects upper lower strings together includes coupling member actuated relative movement between strings. always captures one another when is unlatched lifted, lateral flow passageway opened enables cement be pumped laterally directly annulus. therefore along an isolated path bottom borehole, thereafter down from mid-portion annulus causing uphole towards surface ground, again moved string, thereby closing passageway, whereupon becomes permanent part string.