A perforating bullet with uniform perforation diameter for oil and gas wells
A consistent, oil and gas well technology, applied in the direction of warheads, ammunition, projectiles, etc., can solve problems such as high cost and poor effect, and achieve the effect of improving utilization rate and reasonable distribution
Active Publication Date: 2018-07-13
WUHUA ENERGY TECH CO LTD
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Problems solved by technology
Continued pressurization and consumption of more fluid to effectively press open small-bore channels is costly and ineffective
Method used
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Embodiment Construction
[0020] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0021] The embodiment of the present invention is composed of the following structures, including: a drug-shaped cover 9 , a housing 12 and a high-energy explosive 13 . The drug-shaped cover 9 is a metal drug-shaped cover, and the inner surface 10 and the outer surface 11 all have three sections of upper, middle and lower coaxial circular surfaces of different sizes connected to form. Wherein, the inner surface cover top 2 of the inner surface 10 is an arc-shaped structure, the upper section 3 of the inner surface and the middle section 4 of the inner surface are coaxial conical surface structures, and the lower section 5 of the inner surface is the same as the upper section 3 of the inner surface and the middle section 4 of the inner surface. The arc surface structure of the shaft; the outer surface cover top 1 of the outer surface 11 is an arc-shaped structure,...
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The invention relates to a perforating bullet with consistent perforating aperture for oil and gas wells, which is used to solve the problems caused by hydraulic pressure due to the different sizes of holes formed on the casing due to the misalignment of the perforator during the perforation process of the traditional perforating bullet in the cased well. The technical problem of unsatisfactory fracturing effect. The invention mainly includes a drug-type cover, a casing and a high-energy explosive. The drug-shaped cover is a metal drug-shaped cover, and the inner surface and the outer surface are composed of upper, middle and lower three sections of coaxial circular surfaces of different sizes. The shell is a metal shell, the lower part of the inner cavity is cylindrical, and the middle and upper parts are truncated cones. The high-energy explosive is composed of a booster charge and a main charge, and is located between the drug cover and the shell. In the perforating operation process of the cased well, the perforator can form holes with good consistency on the casing when the perforator is not centered, and has the characteristics of large aperture and deep penetration. Its popularization and application will help increase the effect of hydraulic fracturing after perforation, greatly improve the efficiency of oil and gas recovery, and increase oil and gas production.
Description
technical field [0001] The invention relates to a perforating bullet for oil and gas wells, in particular to a perforating bullet for oil and gas wells with consistent perforation apertures. Background technique [0002] During the perforation and completion construction, the perforation string is not completely centered in oil and gas wells, especially in highly deviated wells and horizontal wells. After perforation, holes of different sizes are formed in the casing. For oil and gas wells that require hydraulic fracturing after perforation, when fracturing, the injection pressure of the largest pore diameter first reaches the fracture pressure of the reservoir, so that the large pore diameter is opened first. aisle. With the increase of fractures, the fracturing pressure of the reservoir gradually decreases, and small-diameter channels cannot be effectively pressed open, and large-angle channels and bridges are easy to form. In order to effectively press open the small ap...
Claims
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IPC IPC(8): F42B12/10F42B33/00E21B43/116
CPCE21B43/116F42B12/10F42B33/00
Inventor 鲁坤李必红赵云涛王喜徐文新雷竹峰段嘉庆李万全李尚杰周明黎涛鲁超
Owner WUHUA ENERGY TECH CO LTD