Rapid continuous window sidetracking device

Abstract

The invention belongs to the field of petroleum drilling, and in particular relates to a rapid and continuous window sidetracking device, which includes a drill pipe, a drill bit, a casing and an oblique device. Both the drill pipe and the drill bit are provided with a drilling fluid passage cavity, and the top of the drill pipe is connected to the drilling mixture. Injection device, the drilling mixture injection device includes a mud pump, the mud pump is connected to the top of the drill pipe through the main line, the drill pipe is connected to the rotary drive device, the main line is equipped with an injection line that is connected to the main line at both ends, and a balance line is set on the injection line , the balance pipeline is connected to the steel grit injection tank, the steel grit injection tank is provided with a steel grit inlet, the bottom is provided with a steel grit outlet, the steel grit outlet is connected to the injection pipeline, the steel grit vibrator is installed at the bottom of the steel grit injection tank, and the two ends of the injection pipeline are connected to the main line Injection pipeline valves are set at the joints, and main line valves are set on the main line. There is no need to pull out the drill to replace the drill bit and the construction process, and can continue to use steel sand impact and drill bit to break rock together to complete the sidetracking operation, which can prevent well deviation and protect the drill bit.

Description

technical field [0001] The invention relates to a sidetracking device for rapidly and continuously opening windows, which belongs to the field of petroleum drilling. Background technique [0002] With the continuous development of oilfields, most oilfields in my country have entered the late stage of exploration and development. With the increase of production time, there are a large number of casing damaged wells, low-yield wells, production wells, and scrapped wells in the production process of oilfields, which seriously reduce the The output of the oilfield is reduced, which affects the benefits of oilfield exploration and development. In order to fully tap the potential of old wells, the sidetracking technology of oil well windows has been widely used. The window sidetracking technology can effectively reduce the development cost of the oil field, deeply excavate the oil reservoir resources in the old well, and can make full use of the original oil production gathering a...

AI Technical Summary

Problems solved by technology

Moreover, because the strength of the casing is much higher than the hardness of the drilling rock, it will often cause greater damage to the window drilling bit, and the cutting speed of the casing is slow, and the cost of casing window opening is high. If the drill bit is damaged during Serious, need to pull out the drill several times to replace the drill bit

Limited by the structure of the drill bit and the construction process, the sidetracking of the casing window is usually discontinuous. After the casing window operation is completed, it is necessary to re-trip the drill, replace the drill bit or the construction process, and repeatedly trip the drill, which will greatly increase the drilling time. The time of side drilling of the window increases the construction cost

Moreover, after repeated drilling, it is easy to affect the wellbore structure and the quality of the wellbore, and increase the probability of sidetracking failure.

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