Horizontal well bushing shaping repair method and device

Abstract

The invention relates to a horizontal well bushing shaping repair method and device. The method comprises putting energetic materials in a down-hole horizontal well tube sleeve to be shaped and repaired, and energy replaced by energetic materials is used for impacting on and loading the inner wall of the horizontal well tube sleeve to be shaped and repaired to enable the diameter of the horizontal well tube sleeve to be shaped and repaired to be expanded to recover the through diameter in the tube. The device comprises an igniter, an integrated drift diameter gauge, at least one shaping gun component and a gun tail. The energetic materials are one type of power sources. The method and the device have the advantages that the energy release speed is high, the diameter expanding force is large, ground rotation, lifting and down impact force are not needed, centering of the device is not required, no litters are produced, capable of solving the technical problem of horizontal well bushing shaping, meeting the current growing horizontal well bushing shaping repair requirement and applicable to shaping repair of various bushings of vertical wells, inclined wells, branch wells and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploitation, and relates to oil and gas well casing shaping and repairing technology, in particular to a horizontal well casing shaping and repairing method and device using energetic materials as a power source, which can be applied to horizontal wells, vertical wells, The plastic repair of various casings such as inclined wells or branch wells can also be applied to other fields of circular pipe diameter expansion and circular pipe compounding. Background technique [0002] Drilling horizontal wells to enhance oil recovery is a commonly used means of increasing oil production. At present, the total number of horizontal wells that have been drilled and put into production in China exceeds 10,000, and 2,000-3,000 new wells are added every year. After the continuous deepening of oilfield development, various problems have begun to appear in the existing horizontal wells. In rece...

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Problems solved by technology

[0004] At present, the explosion shaping technology (such as patents CN92201437.X, CN2228971Y, CN 2437843Y, CN 2437844Y, CN2532924Y, US3734018, US6536349, etc.) that uses explosives as energy has the following disadvantages in the use of horizontal wells. Casing blockage in horizontal wells caused by falling objects, and shell-less plastic bullets are prone to breakage accidents when they are lowered into horizontal wells due to insufficient strength

(2) Explosion shaping technology using explosives as the energy source produces an explosion pressure of up to gigapascals after detonation. Due to the mechanism of shock wave propagation and explosion action, the casing near the projectile is prone to rupture, while the casing far away from the projectile is not. Shaping effect, the energy is difficult to control, and cannot meet the shaping and repairing requirements of horizontal well casings. Due to the above reasons, there is no explosive shaping technology used in the shaping and repairing of horizontal well casings in construction practice.

[0005] In summary, none of the existing repair technologies can meet the technical requirements for casing shaping and repair in horizontal wells.

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