Radial horizontal well drilling device and method

Abstract

The invention relates to a radial horizontal well drilling device and method. The device comprises a suspension feeding part, a dynamic supercharging part, a continuous drilling part and a sliding sealing part; the suspension feeding part can be movably arranged at a wellhead of a vertical shaft with the top sealed, the top of the dynamic supercharging part can be detachably connected to the suspension feeding part, the bottom of the dynamic supercharging part is communicated with the continuous drilling part with the flexible drilling function, and the dynamic supercharging part can increasethe pressure of fluid entering the continuous drilling part; the continuous drilling part is used for drilling a radial horizontal well, and the sliding sealing part can slidably seal and isolate theupper space of the continuous drilling part. According to the radial horizontal well drilling device and method, a discontinuous oil tube drilling operation mode adopted, the problems caused by operation of the continuous oil tube operation machine are avoided, the device is simple in structure and low in cost, the horizontal well construction process can be safely and efficiently completed, and wider application of the horizontal well technology can be obtained conveniently.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas exploitation, in particular to a radial horizontal well drilling device and a drilling method for discontinuous tubing drilling operations. Background technique [0002] my country is rich in unconventional energy sources (shale gas, coalbed methane, geothermal, etc.), and the accumulation mechanism of unconventional natural gas is different from that of conventional oil and gas, so conventional mining methods are not suitable; the development of geothermal resources is also in continuous research, but like Technical means such as hydraulic fracturing are not very effective, therefore, there is an urgent need for an efficient and economical technical means of mining. [0003] With the continuous development of drilling and completion technology, complex well types based on horizontal wells have been gradually developed, providing a theoretical basis for the exploitation of unconventiona...

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Problems solved by technology

[0006] The object of the present invention is to provide a radial horizontal well drilling device and its drilling method, which overcomes the problems of high operating cost, large length of coiled tubing and limited pressure of the coiled tubing machine in the prior art. The flat well drilling device and its drilling method adopt the non-continuous tubing drilling operation method to avoid the problems caused by the operation of the coiled tubing machine. The device structure is simple, the cost is low, and the horizontal well construction process can be completed safely and efficiently, which is beneficial to the horizontal well technology. be more widely used

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