US 11,952,844 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)
Appl. No. 17/427,436
Filed by National Oilwell Varco, L.P., Houston, TX (US)
PCT Filed Jan. 31, 2020, PCT No. PCT/US2020/016162
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2020/160440, PCT Pub. Date Aug. 6, 2020.
Claims priority of provisional application 62/799,538, filed on Jan. 31, 2019.
Prior Publication US 2022/0127917 A1, Apr. 28, 2022
Int. Cl. E21B 19/15 (2006.01)
CPC E21B 19/155 (2013.01) 18 Claims
OG exemplary drawing
 
1. A well system, comprising:
a well platform comprising a rig floor;
a first rig floor robot and a second 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 and the second rig floor robot is configured to guide a first pipe joint of the pipe stand laterally across the rig floor and into a first mouse hole formed in the rig floor;
a mast extending from the rig floor;
a racking board coupled to the mast, the racking board configured to secure an upper end of the pipe stand between a pair of finger boards of the racking board; and
a racking board robot positioned on the racking board and configured to position the upper end of the pipe stand between the pair of finger boards.