Fast and continuous window sidetracking drilling device

Abstract

The invention belongs to the field of petroleum drilling, and particularly relates to a fast and continuous window sidetracking drilling device. The fast and continuous window sidetracking drilling device comprises a drill rod, a drill bit, a sleeve and a whipstock, and drilling fluid passing cavities are formed in the drill rod and the drill bit respectively; the top of the drill rod is connected with a drilling mixture injecting device, the drilling mixture injecting device comprises a slush pump, the slush pump is connected with the top of the drill rod through a main pipeline, the drill rod is connected with a rotary driving device, and an injecting pipeline with the two ends communicated with the main pipeline is arranged on the main pipeline and provided with a balance pipeline; the balance pipeline is connected with a steel shot injecting tank, a steel shot inlet is formed in the upper portion of the steel shot injecting tank, a steel shot outlet is formed in the bottom of the steel shot injecting tank and connected with the injecting pipeline, a steel shot vibrator is arranged under the steel shot injecting tank, injecting pipeline valves are arranged at the positions, connected with the main pipeline, of the two ends of the injecting pipeline respectively, and a main pipeline valve is arranged on the main pipeline. Steel shot impact and the drill bit can continue to be used for rock breaking together to complete sidetracking operation without replacing the drill bit by pulling the drill bit out or adopting a construction technology, well deviation can be prevented, and the drill bit can be protected.

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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