Perforating device for horizontal wells

US11359466B2 · kind B2 · utility

Assignees

• SINOPEC OILFIELD SERVICE CORPORATION · CN
• SINOPEC OILFIELD SERVICE JIANGHAN CORPORATION · CN
• LOGGING COMPANY, SINOPEC OILFIELD SERVICE JIANGHAN CORPORATION · CN

Inventors

• Guosheng YANG · Beijing, CN
• Yong Liao · Qianjiang, CN
• Zhihua Zhang · Lo Wu, CN
• Liang Ye · Longbeilingcun, CN
• Jiang Zhu · Cupertino, US
• Haitao Rao · Qianjiang, CN
• Jinguo Pan · Qianjiang, CN
• Siping Chen · Ningbo City, CN
• Yuanhui Shi · Qianjiang, CN
• Yijiang Feng · Qianjiang, CN
• Peiwen Gu · Qianjiang, CN
• Chao LU · Beijing, CN
• Zhongxin Fan · Qianjiang, CN
• Zhi-Yang Li · Kunshan, CN
• Chaohui Zhang · Foster City, US

Key dates

• Filing date: Sep 6, 2020
• Grant date: Jun 14, 2022
• Expiry date: Sep 6, 2040

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B47/092
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A perforating device includes a release sub, a rotating segment, a first centralizer, a braking segment, a casing collar locator, a traction mechanism, a second centralizer, a flex joint, a power supply segment, a shock absorber, a perforator, and a tail segment, which are in threaded connection sequentially to each other. The first joint assembly includes a first joint, a guide key, a connecting sleeve including a locking groove, a second joint, and an outer pipe; the first joint of the first joint assembly is in threaded connection to the cable bridle, and the second joint is in threaded connection to the outer pipe. The connecting sleeve is disposed inside the outer pipe and is connected to the first joint through the guide key. The second joint assembly includes a plurality of locking claws, a third joint, and a head.