US 11,674,621 B2
Hammer union connection and related methods of assembly
Tep Ungchusri, Conroe, TX (US); Paul A. Crawford, Houston, TX (US); William H. Garner, Houston, TX (US); Alan R. Killingsworth, The Woodlands, TX (US); and King F. Choi, Sugar Land, TX (US)
Assigned to FMC Technologies, Inc., Houston, TX (US)
Filed by FMC Technologies, Inc., Houston, TX (US)
Filed on Jul. 19, 2019, as Appl. No. 16/516,746.
Application 16/516,746 is a continuation of application No. 14/427,222, granted, now 10,393,294, previously published as PCT/US2012/055208, filed on Sep. 13, 2012.
Prior Publication US 2019/0338873 A1, Nov. 7, 2019
Int. Cl. F16L 19/02 (2006.01)
CPC F16L 19/0218 (2013.01) [F16L 19/0231 (2013.01); Y10T 29/49826 (2015.01)] 13 Claims
OG exemplary drawing
 
1. A hammer union having a threaded female sub, the threaded female sub comprising:
a conduit having a first end and a female end,
wherein the female end of the threaded female sub comprises:
an outer contact surface substantially perpendicular to a longitudinal axis of the threaded female sub, an outermost diameter of the outer contact surface being equidistant as a minor thread diameter of the threaded female sub from the longitudinal axis of the threaded female sub;
an inner contact surface substantially perpendicular to the longitudinal axis of the threaded female sub and having a different axial location along the longitudinal axis of the threaded female sub than the outer contact surface; and
an intermediate contact surface between the outer contact surface and the inner contact surface, the intermediate contact surface having at least a portion that is both non-parallel and non-perpendicular to the longitudinal axis of the threaded female sub, wherein the portion that is both non-parallel and non-perpendicular to the longitudinal axis of the threaded female sub extends from the inner contact surface to the outer contact surface; and
a seal pocket formed on an inner surface of the threaded female sub, wherein the seal pocket is radially inwardly adjacent the inner contact surface.