Downhole Turbine Powered Laser Drilling Tools

Abstract

The invention belongs to the field of petroleum drilling, in particular to an underground turbine power laser drilling tool. The underground turbine power laser drilling tool comprises a power source outer barrel, a stator blade, a rotor blade, a turbine shaft, sealing rings, a generator outer barrel, a stator, a rotor, a limit joint, a current transformer, an optical fiber laser, a combiner, an optical fiber, a drill bit body and a laser head. The stator blade and the rotor blade are connected with the turbine shaft and of an up-down two-stage structure, two O-shaped sealing rings are respectively arranged above and below the generator outer barrel, the stator and the rotor coact to produce electric energy, the current transformer is arranged at the lower part of the generator outer barrel, the optical fiber laser is arranged at the lower part of the limit joint, and laser produced by the combiner is transported to the laser head at the bottom of the drill bit body through the optical fiber. The underground turbine power laser drilling tool can provide a stable power supply for the optical fiber laser, high-energy laser transmission convergence is guaranteed, an existing drilling technology is not changed, laser and drill bit mechanical combined efficient rock breaking is realized, and petroleum drilling speed is effectively increased.

Description

technical field [0001] The invention relates to a downhole turbine power laser drilling tool, which belongs to the field of petroleum drilling. Background technique [0002] Improving the ROP of oil drilling is the eternal direction of drilling technology development. By increasing the ROP, drilling costs can be effectively reduced and the benefits of oil exploration and development can be improved. Laser rock-breaking drilling technology is a new type of high-efficiency rock-breaking drilling technology. This technology irradiates high-energy laser beams on the rock surface to form huge laser irradiation energy locally on the rock surface. The high-energy laser makes the rock surface heat up rapidly. The formed high temperature can Melt or vaporize the rock to form a multi-phase mixture of gas, solid and liquid, which is carried by fluid or other means to the wellhead. This technology can achieve efficient rock crushing. At the same time, this technology also has the functi...

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Problems solved by technology

However, there are still some problems in this technology at this stage, such as how to provide a stable laser energy source for downhole, how to achieve efficient laser convergence and transmission, how to achieve matching with existing drilling technology, how to achieve efficient rock breaking with laser and drill bit machinery, etc. These problems seriously restrict the promotion and application of laser drilling technology

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