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A horizontal well casing shaping and repairing method and device

A repair method and horizontal well technology, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of horizontal well casing blockage, prone to rupture at the projectile body, and insufficient strength, and achieve large diameter expansion force, Guarantee normal production operation and high energy release rate

Active Publication Date: 2018-07-03
NORTH SCHLUMBERGER OILFIELD TECH XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, explosive shaping technologies (such as patents CN92201437.X, CN2228971Y, CN2437843Y, CN 2437844Y, CN2532924Y, US3734018, US6536349, etc.) that use explosives as energy sources have the following disadvantages when used in horizontal wells. Falling objects cause blockage of casing in horizontal wells, and casing-less shaping bullets are prone to breakage accidents when running 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.

Method used

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  • A horizontal well casing shaping and repairing method and device
  • A horizontal well casing shaping and repairing method and device
  • A horizontal well casing shaping and repairing method and device

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Embodiment

[0048] like Figure 1-4 As shown, this embodiment provides a specific structure of a horizontal well casing shaping and repairing device, which includes an igniter 1, an integrated bore gauge 2, a shaping gun assembly 3, and a gun tail or a connecting joint 4 connected in sequence; , the shaping gun assembly includes a shaping gun 31, an energetic material main charge 32, an ignition transmission central tube assembly 33, an integrated bore gauge 2, an intermediate joint and a gun tail 4, and the energetic material main charge 32 is set at the point The central tube assembly 33 for fire transmission is placed inside the shaping gun 31 , and the integrated bore gauge 2 is provided with a pressure relief groove 21 .

[0049] The main charge of this embodiment is composite gunpowder (prescription: epoxy resin 30%, ammonium perchlorate 55%, aluminum powder 14%, burning rate regulator Fe 2 o 3 1%), the outer diameter of the main charge is 66mm, the inner diameter is 25mm, the len...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/10
CPCE21B29/10
Inventor 姚元文王宝兴汪长栓冯国富雷卫国谢明召冯卫东袁铁刚邱石异曹红砚刘雁安王健
Owner NORTH SCHLUMBERGER OILFIELD TECH XIAN
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