US 12,326,047 B2
Pipe connection
Martin Ward, Norwich (GB); and Andrew Potts, Norwich (GB)
Assigned to Aquaterra Energy Limited, Norwich (GB)
Filed by Aquaterra Energy Limited, Norwich (GB)
Filed on Nov. 16, 2022, as Appl. No. 17/987,912.
Claims priority of application No. 2116500 (GB), filed on Nov. 16, 2021.
Prior Publication US 2023/0151912 A1, May 18, 2023
Int. Cl. E21B 17/043 (2006.01); E21B 17/046 (2006.01); F16L 15/08 (2006.01); F16L 25/06 (2006.01)
CPC E21B 17/043 (2013.01) [E21B 17/046 (2013.01); F16L 15/08 (2013.01); F16L 25/065 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pipe joint formed between a pin section and a box section, the pipe joint comprising:
the pin and box sections each having a tubular pipe section, engaging at respective first ends in end-to-end arrangement and having a seal element partially therebetween;
the box section including a box stress collar extending from the first end, the box stress collar being generally cylindrical, axially aligned with the tubular box pipe section and having an inner diameter of the same size as the outer diameter of the pin section, enabling the box stress collar to be placed about the pin section;
the pin and the box sections being secured together via one or more dogs housed in the box collar;
wherein the one or more dogs, responsive to exertion of radial pressure thereon, engage corresponding portions of the pin and thereby cause the pin and box to be sealed together; and
the pin section including a circumferential collar located to engage a profiled end surface of the box stress collar on make-up of the joint, the circumferential collar including a circumferential pin channel defined by a pin edge rim, the profiled end surface of the box section including a box channel defined by an inner rim and an outer rim, the circumferential pin channel housing the inner rim of the box and the box channel housing the pin edge rim.