Systems devices and methods for the transmission of 1 kW or more of laser energy deep into the earth and for the suppression of associated nonlinear phenomena. Systems, devices and methods for the laser perforation of a borehole in the earth. These systems can deliver high power laser energy down a
Systems devices and methods for the transmission of 1 kW or more of laser energy deep into the earth and for the suppression of associated nonlinear phenomena. Systems, devices and methods for the laser perforation of a borehole in the earth. These systems can deliver high power laser energy down a deep borehole, while maintaining the high power to perforate such boreholes.
대표청구항▼
1. A high power laser perforating system for providing high power laser energy to locations in a borehole to perforate a casing, the system comprising: a. a source for high powered laser energy capable of providing a high power laser beam having a power greater than about 10 kW;b. an optical fiber f
1. A high power laser perforating system for providing high power laser energy to locations in a borehole to perforate a casing, the system comprising: a. a source for high powered laser energy capable of providing a high power laser beam having a power greater than about 10 kW;b. an optical fiber for transmitting the laser beam from the high power laser to a perforation location in a borehole;c. the optical fiber in optical communication with a bottom hole assembly for delivering the laser beam to the location on a casing in a borehole to be perforated; and,d. the optical fiber having a means to suppress Stimulated Brillouin Scattering arising from the transmission of the greater than 10 kW laser beam;e. whereby, substantially all power of the high power laser beam is delivered from the bottom hole assembly to the perforation location on the casing. 2. The high power laser perforating system of claim 1, wherein the deep borehole is at least 1,000 feet and the numeric aperture of the fiber is from about 0.1 to about 0.6. 3. The high power laser perforating system of claim 1, wherein the deep borehole is at least 5,000 feet and the source of high power laser energy comprises a fiber laser and a chiller. 4. The high power laser perforating system of claim 3, wherein the source for high power laser energy is at least 20 kW. 5. A high power laser perforating system for providing high power laser energy to locations in a borehole to perforate the borehole, the system comprising: a. a high powered laser source, capable of providing a high power laser beam, having at least about 10 kW of power;b. a means for suppressing nonlinear scattering phenomena from the high power laser beam; and,c. a means for transmitting the laser beam from the high power laser source to a perforating location in the borehole;d. whereby, the high power laser beam is delivered to the perforating location in the borehole. 6. The laser perforating system of claim 5, wherein the nonlinear scattering phenomena is Stimulated Brillouin Scattering and the means for transmitting the laser beam has a length of at least about 1,000 feet. 7. The laser perforating system of claim 5, wherein the means for suppressing comprises a means for varying a linewidth of the laser source, whereby a Brillouin gain factor is decreased and the means for transmitting the laser beam has a length of at least about 2,000 feet. 8. The laser perforating system of claim 5, wherein the high power laser source is a solid-state laser, capable of providing a high power laser beam characterized by a power of at least about 15 kW. 9. The laser perforating system of claim 8, wherein the laser beam is characterized by a varying linewidth, wherein a gain function is suppressed, and whereby a nonlinear phenomena is suppressed. 10. The laser perforating system of claim 5, wherein the high power laser source comprises a combination of a plurality of laser sources capable of providing a combined high power laser beam characterized by a combined wavelength having a wavelength range; wherein each laser source from the plurality of laser sources is capable of providing a high power laser beam characterized by a source wavelength, having a source wavelength range; and wherein the means for suppressing comprises the combined wavelength range being broader than a source wavelength and the means for transmitting the laser beam has a length of at least about 1,000 feet. 11. A laser perforating system for providing high power laser energy to a location in a well, the system comprising: a. a high powered laser, capable of providing a high power laser beam having at least about 10 kW of power;b. a first means for suppressing nonlinear scattering phenomena arising from the transmission of the at least about 10 kW laser beam, in association with the high power laser;c. a means for transmitting the laser beam from the high power laser to a location in a well to perform a perforating operation in the well; and,d. a second means for suppressing nonlinear scattering phenomena arising from the transmission of the at least about 10 kW laser beam, in association with the means for transmitting;e. whereby, the high power laser energy is delivered to the location in the well to perform the perforating operation. 12. The system of claim 11, wherein the high power laser source comprises a combination of a plurality of laser sources, wherein each laser source of the combination is capable of providing a high power laser beam characterized by a linewidth; wherein the first means for suppressing comprises a combination of the laser beams from the plurality of laser sources, and a combined laser beam characterized by an effective linewidth greater than the linewidth of a laser beam from a laser source from the plurality of laser sources; and wherein the combined beam is characterized by having a power of at least about 40 kW.
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