公开(公告)号：EP3492689A1

公开(公告)日：2019-06-05

申请号：EP19150229.3

申请日：2014-03-12

申请人： Ameriforge Group Inc. ,  Walker, Stephen J. ,  Nance, Gilbert ,  Arthion, Randy

发明人： Walker, Stephen J. ,  Nance, Gilbert ,  Arthion, Randy

IPC分类号： E21B17/08 ,  E21B17/01

摘要： A riser assembly is disclosed comprising: a main tube; two flanges coupled to the main tube, each flange comprising: a central lumen configured to be in fluid communication with the main tube; at least one choke/kill hole configured to receive a choke/kill line; at least one booster hole configured to receive a booster line; and a plurality of bolt holes, each bolt hole comprising a tapered portion and a dowel slot, where each bolt hole is configured to receive a nut, a bolt, and a dowel. In certain embodiments, riser strings comprising at least two riser assemblies coupled to each other are disclosed.