US 12,473,783 B2
Tubular string building system and method
Robert Benjamin Donnally, Houston, TX (US); and Xilin Liu, Houston, TX (US)
Assigned to National Oilwell Varco, L.P., Houston, TX (US)
Filed by National Oilwell Varco, L.P., Houston, TX (US)
Filed on Mar. 5, 2024, as Appl. No. 18/596,127.
Application 18/596,127 is a division of application No. 17/427,436, granted, now 11,952,844, previously published as PCT/US2020/016162, filed on Jan. 31, 2020.
Claims priority of provisional application 62/799,538, filed on Jan. 31, 2019.
Prior Publication US 2024/0209698 A1, Jun. 27, 2024
Int. Cl. E21B 19/15 (2006.01)
CPC E21B 19/155 (2013.01) 18 Claims
OG exemplary drawing
 
8. A well system, comprising:
a rig floor;
a first rig floor robot positioned on the rig floor, wherein the first rig floor robot is configured to guide a lower end of a pipe stand towards a setback position on the rig floor;
a mast extending from the rig floor, the mast comprising a plurality of legs;
a pipe transport assembly slidably coupled to one of the legs of the mast, wherein the pipe transport assembly comprises an elevator configured to transport the pipe stand and which is pivotable relative to the mast about both a first pivot axis and a separate second pivot axis, wherein the second pivot axis extends orthogonally relative to the first pivot axis; and
a winch coupled to the mast and configured to raise and lower the pipe transport assembly along the mast.