公开(公告)号：US20140265304A1

公开(公告)日：2014-09-18

申请号：US14169399

申请日：2014-01-31

申请人： Sharewell Energy Services, LLC

发明人： Craig MacDonald ,  Mark Miller

IPC分类号： E21B17/02

CPC分类号： E21B17/003 ,  E21B47/122

摘要： A non-conductive composite insert is provided between conductive portions, useful, for example, in downhole EM telemetry applications as an external “gap sub” in a drill collar, or as a sonde-based internal gap. In a preferred embodiment, the composite is made from a glass-fiber reinforced plastic, and separates non-magnetic conductive portions made from stainless steel. The composite insert provides a slanted or tapered transition into the conductive portions at either or both ends of the insert. The transitions on the composite insert may comprise one or more tapered surfaces, which may be male or female in configuration with respect to matching transitions on the conductive portions. The transitions may be bonded together by adhesive, or alternatively may be threaded.

摘要翻译： 在导电部分之间提供非导电复合插入件，例如在井下EM遥测应用中可用作钻铤中的外部“间隙”，或者作为基于探空仪的内部间隙。 在优选实施例中，复合材料由玻璃纤维增​​强塑料制成，并分离由不锈钢制成的非磁性导电部分。 复合插入件在插入件的任一端或两端提供向导电部分的倾斜或锥形过渡。 复合插入物上的跃迁可以包括一个或多个锥形表面，其相对于导电部分上的匹配转变可以是凸形或阴形。 转移可以通过粘合剂粘合在一起，或者可以是带螺纹的。

公开(公告)号：US20140049036A1

公开(公告)日：2014-02-20

申请号：US13858690

申请日：2013-04-08

申请人： SHAREWELL ENERGY SERVICES, LLC

发明人： Mark Miller ,  Craig MacDonald ,  Michael Doan

IPC分类号： F16L25/02

CPC分类号： F16L25/021 ,  E21B17/003 ,  E21B17/042 ,  E21B47/122

摘要： A gap sub comprises at least one, and in a preferred embodiment, two electrically isolating threaded joints in a conductive tubular collar. The threads of the joints are isolated by a non-conductive coating in accordance with the prior art. The shoulders of the joints are separated by an isolating ring. Annular faces on the ring make contact with the shoulders in the joints. The ring is made of conductive material with a non-conductive coating deployed on (1) at least one, and advantageously both, of the ring's annular faces, and (2) the interior surface of the ring. An annular recess in the collar prevents electrical contact between collar sections nearby the ring either side of each threaded joint.

摘要翻译： 间隙子部分包括至少一个，并且在一个优选的实施例中是导电管状套环中的两个电绝缘螺纹接头。 根据现有技术，接头的螺纹由非导电涂层隔离。 接头的肩部由隔离环隔开。 环上的环形面与接头处的肩部接触。 环由导电材料制成，其中非导电涂层部署在（1）环的环形面中的至少一个且有利地两个上，以及（2）环的内表面。 套环中的环形凹部防止每个螺纹接头的任一侧的环附近的套环部分之间的电接触。