Patent ID: 9217291
Filing Date: 2015-12-22
Classification: E21B

Abstract:
1. A downhole laser tool for penetrating a hydrocarbon bearing formation, the downhole laser tool comprising: a laser surface unit configured to generate a high power laser beam, the laser surface unit in electrical communication with a fiber optic cable, the fiber optic cable configured to conduct the high power laser beam, the fiber optic cable comprising an insulation cable configured to resist high temperature and high pressure, a protective laser fiber cable configured to conduct the high power laser beam, a laser surface end configured to receive the high power laser beam, a laser cable end configured to emit a raw laser beam from the fiber optic cable; an outer casing placed within an existing wellbore wherein the existing wellbore extends within a hydrocarbon bearing formation; a hard case placed within the outer casing, wherein the fiber optic cable is contained within the hard case; and a rotational system positioned within the outer casing, the rotational system comprising a rotational casing coupled to the end of the hard case, a rotational head extending from the rotational casing, wherein the rotational system is configured to rotate around the axis of the hard case, wherein the downhole laser tool head comprises a first cover lens proximate to the focusing system, a laser muzzle positioned to discharge the collimated laser beam from the downhole laser tool head, a fluid knife proximate to the laser muzzle side of the first cover lens, a purging nozzle within the downhole laser tool proximate to the laser muzzle, a vacuum nozzle proximate with the laser muzzle, and a temperature sensor adjacent to the laser muzzle,