Ameriforge Group Inc.

Grant Prideco, Inc.

Fraczek, Justin

Gidman, Alex

Arthion, Randy

Kennedy, Roland

Walker, Stephen J.

Nance, Gilbert

Randy Arthion

Justin Fraczek

Alex Gidman

Roland Kennedy

Stephen John Walker

Gilbert Nance

This disclosure includes flow spool riser segment assemblies that are suitable for managed pressure drilling (MPD) and that can be lowered (e.g., when connected to other riser segment assemblies) through a rotary of a drilling rig. Some embodiments are configured to have portions of the flow spool connected (e.g., without welding) below the rotary.

MPD-capable flow spools

This disclosure includes auxiliary-line riser segment assemblies (e.g., with isolation units) that are suitable for managed pressure drilling (MPD) and that can be lowered (e.g., when connected to other riser segment assemblies) through a rotary of a drilling rig. Some embodiments are configured to have portions of the auxiliary lines connected (e.g., without welding) below the rotary.

Large width diameter riser segment lowerable through a rotary of a drilling rig

Large-width diameter riser segment lowerable through a rotary of a drilling rig

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.

Drilling riser assemblies

Large-width/diameter riser segment lowerable through a rotary of a drilling rig

Growing community of inventors

Houston, TX, United States of America

Randy Arthion