Patent ID: 8627901
Filing Date: 2014-01-14
Classification: E21B

Abstract:
1. A laser bottom hole assembly comprising: a. an end having an opening for receiving a fluid flow and a means for providing a laser beam having at least 5 kW of power; b. a means for separating the fluid flow and conveying the means for providing the laser beam, the means for separating the fluid flow and conveying the means for providing a laser beam in fluid communication with the fluid flow, a first fluid path and a second fluid path, whereby in operation the fluid flow is separated into the first fluid path and the second fluid path; c. an external housing comprising a rotating section, a non-rotating section, and an external rotational transition zone, the rotating section of the external housing comprising rotating and non-rotating internal components; d. the means for separating the fluid flow and conveying the means for providing a laser beam, and the first and second fluid paths positioned within the external housing; e. a means for providing rotational movement comprising a non-rotating screw member, at least a portion of the second fluid path contained within the screw member and at least a portion of the means for providing a laser beam within the screw member; f. an internal rotational transition zone within the rotating section of the external housing, whereby a transition from the non-rotating internal components to the rotating internal components occurs; and, g. an exhaust port in the rotating section of the external housing, the exhaust port in fluid communication with the first fluid path and positioned above the internal rotational transition zones.