Patent
Fracture eccentric locating detector for mechanical horizontal well casing
Zhu Yinghui,Zhang Quansheng,Zhang Feng,Tian Yugang,Weikai Yi,Yang Hui,Shengkui Wen,An Shenfa +7 more
- 02 Jan 2013
1
TL;DR: In this article, a fracture eccentric locating detector for a mechanical horizontal well casing, which is suitable for horizontal wells with fractured oilfield casings and is used for detecting fracturing directions and fracturing degrees of the casings.
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Abstract: The invention provides a fracture eccentric locating detector for a mechanical horizontal well casing, which is suitable for horizontal wells with fractured oilfield casings and is used for detecting fracturing directions and fracturing degrees of the casings. The detector comprises a lead mold and an oil pipe joint, wherein an eccentric counterweight locating device is connected between the oil pipe joint and the lead mold; a counterweight mounting vertical slot is formed in the inner circle of a locating inner cylinder of the eccentric counterweight locating device; and a counterweight strip is mounted in the counterweight mounting vertical slot. As the counterweight strip is mounted, after being put into a horizontal well section, one side of the fracture eccentric locating detector mounted with the counterweight strip is always positioned on downside, so that the fracturing direction of the casing can be distinguished after the fracture eccentric locating detector is lifted out of the ground. The fracture eccentric locating detector for the mechanical horizontal well casing, provided by the invention, has the advantages of simple structure, working reliability, complete function, credible detection information, wide applicability, low cost, low requirement on use condition, convenience in field application and lower technical requirement on construction team; the construction step of the fracture eccentric locating detector is as same as the conventional printing process; and the direction and fracturing degree of the fractured casing in the underground horizontal section can be effectively detected, so that the operation time is saved and workover efficiency and quality are enhanced.
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Citations
Patent
Casing breaking position detecting method
Pang Yunwei
- 01 Apr 2015
TL;DR: In this paper, a gyro inclinometer and an electromagnetic detector are disposed below a casing breaking point from a wellhead, and the electromagnetic detector is used for detecting a displacement and a direction of a broken lower casing relative to electromagnetic detector.
1
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Yinghui Zhu,Zhang Quansheng,Tian Yugang,Guiying Wang,Yubao Li,Shengkui Wen,Ren Jiamin,Jianguo Dong,Haitao Li,Juanhua Yang +9 more
- 01 Aug 2012
TL;DR: In this article, the utility model provides a correcting and repairing integrated tool for casing-broken horizontal wells, which structurally comprises a bottom expansion working chamber, an expansion combined sealing device, a propelling hydraulic cylinder device and an upper anchoring device connected from bottom to top sequentially integrally.
5
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