Patent ID: 7520334

Claim:
A subsurface lubricator for lubricating a long tool string into a cased wellbore, comprising: a hollow lubricator tube for housing the long tool string, the lubricator tube having a top end and a bottom end; a lubricator tube adaptor connected to the top end of the lubricator tube, the lubricator tube adaptor having a central passage that communicates with an interior of the hollow lubricator tube, a top flange for connection of equipment for controlling the long tool string, and a radially-oriented injector plate having at least four connection points; an anchor plate having a central passage through which the hollow lubricator tube reciprocates, a packing cavity that surrounds the central passage and accepts high-pressure packing for providing a high pressure fluid seal around an outer periphery of the lubricator tube, and at least four connection points; a pair of telescopic hydraulic cylinders to lubricate the lubricator tube through a wellhead and into a casing of the cased wellbore, each telescopic hydraulic cylinder being connected to one of the connection points on the injector plate and one of the connection points on the anchor plate; extension rods for connecting cylinder rod ends of the telescopic hydraulic cylinders to the connection points of the injector plate; stay rods having first and second ends for respective connection to a one of the connection points on the injector plate and a one of the connection points on the anchor plate, the stay rods used to secure the lubricator tube in a partially lubricated-in position while the telescopic hydraulic cylinders are being extended for reconnection to the injector plate; and a packoff tool connected to the bottom end of the lubricator tube provide a high pressure seal to isolate a wellhead of the cased wellbore from fluid pressure in the lubricator tube and the cased well bore below the packoff tool.